/* Definitions of target machine for GNU compiler, for MMIX.
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/* Definitions of target machine for GNU compiler, for MMIX.
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Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
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Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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Contributed by Hans-Peter Nilsson (hp@bitrange.com)
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Contributed by Hans-Peter Nilsson (hp@bitrange.com)
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This file is part of GCC.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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any later version.
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GCC is distributed in the hope that it will be useful,
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "config.h"
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#include "system.h"
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#include "system.h"
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#include "coretypes.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "tm.h"
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#include "rtl.h"
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#include "rtl.h"
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#include "regs.h"
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#include "regs.h"
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#include "hard-reg-set.h"
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#include "hard-reg-set.h"
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#include "hashtab.h"
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#include "hashtab.h"
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#include "insn-config.h"
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#include "insn-config.h"
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#include "output.h"
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#include "output.h"
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#include "flags.h"
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#include "flags.h"
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#include "tree.h"
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#include "tree.h"
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#include "function.h"
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#include "function.h"
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#include "expr.h"
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#include "expr.h"
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#include "toplev.h"
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#include "toplev.h"
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#include "recog.h"
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#include "recog.h"
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#include "ggc.h"
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#include "ggc.h"
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#include "dwarf2.h"
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#include "dwarf2.h"
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#include "debug.h"
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#include "debug.h"
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#include "tm_p.h"
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#include "tm_p.h"
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#include "integrate.h"
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#include "integrate.h"
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#include "target.h"
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#include "target.h"
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#include "target-def.h"
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#include "target-def.h"
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#include "real.h"
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#include "real.h"
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/* First some local helper definitions. */
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/* First some local helper definitions. */
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#define MMIX_FIRST_GLOBAL_REGNUM 32
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#define MMIX_FIRST_GLOBAL_REGNUM 32
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/* We'd need a current_function_has_landing_pad. It's marked as such when
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/* We'd need a current_function_has_landing_pad. It's marked as such when
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a nonlocal_goto_receiver is expanded. Not just a C++ thing, but
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a nonlocal_goto_receiver is expanded. Not just a C++ thing, but
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mostly. */
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mostly. */
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#define MMIX_CFUN_HAS_LANDING_PAD (cfun->machine->has_landing_pad != 0)
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#define MMIX_CFUN_HAS_LANDING_PAD (cfun->machine->has_landing_pad != 0)
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/* We have no means to tell DWARF 2 about the register stack, so we need
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/* We have no means to tell DWARF 2 about the register stack, so we need
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to store the return address on the stack if an exception can get into
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to store the return address on the stack if an exception can get into
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this function. FIXME: Narrow condition. Before any whole-function
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this function. FIXME: Narrow condition. Before any whole-function
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analysis, regs_ever_live[] isn't initialized. We know it's up-to-date
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analysis, regs_ever_live[] isn't initialized. We know it's up-to-date
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after reload_completed; it may contain incorrect information some time
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after reload_completed; it may contain incorrect information some time
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before that. Within a RTL sequence (after a call to start_sequence,
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before that. Within a RTL sequence (after a call to start_sequence,
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such as in RTL expanders), leaf_function_p doesn't see all insns
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such as in RTL expanders), leaf_function_p doesn't see all insns
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(perhaps any insn). But regs_ever_live is up-to-date when
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(perhaps any insn). But regs_ever_live is up-to-date when
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leaf_function_p () isn't, so we "or" them together to get accurate
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leaf_function_p () isn't, so we "or" them together to get accurate
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information. FIXME: Some tweak to leaf_function_p might be
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information. FIXME: Some tweak to leaf_function_p might be
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preferable. */
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preferable. */
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#define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \
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#define MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS \
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(flag_exceptions \
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(flag_exceptions \
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&& ((reload_completed && regs_ever_live[MMIX_rJ_REGNUM]) \
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&& ((reload_completed && regs_ever_live[MMIX_rJ_REGNUM]) \
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|| !leaf_function_p ()))
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|| !leaf_function_p ()))
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#define IS_MMIX_EH_RETURN_DATA_REG(REGNO) \
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#define IS_MMIX_EH_RETURN_DATA_REG(REGNO) \
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(current_function_calls_eh_return \
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(current_function_calls_eh_return \
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&& (EH_RETURN_DATA_REGNO (0) == REGNO \
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&& (EH_RETURN_DATA_REGNO (0) == REGNO \
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|| EH_RETURN_DATA_REGNO (1) == REGNO \
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|| EH_RETURN_DATA_REGNO (1) == REGNO \
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|| EH_RETURN_DATA_REGNO (2) == REGNO \
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|| EH_RETURN_DATA_REGNO (2) == REGNO \
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|| EH_RETURN_DATA_REGNO (3) == REGNO))
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|| EH_RETURN_DATA_REGNO (3) == REGNO))
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/* For the default ABI, we rename registers at output-time to fill the gap
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/* For the default ABI, we rename registers at output-time to fill the gap
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between the (statically partitioned) saved registers and call-clobbered
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between the (statically partitioned) saved registers and call-clobbered
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registers. In effect this makes unused call-saved registers to be used
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registers. In effect this makes unused call-saved registers to be used
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as call-clobbered registers. The benefit comes from keeping the number
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as call-clobbered registers. The benefit comes from keeping the number
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of local registers (value of rL) low, since there's a cost of
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of local registers (value of rL) low, since there's a cost of
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increasing rL and clearing unused (unset) registers with lower numbers.
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increasing rL and clearing unused (unset) registers with lower numbers.
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Don't translate while outputting the prologue. */
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Don't translate while outputting the prologue. */
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#define MMIX_OUTPUT_REGNO(N) \
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#define MMIX_OUTPUT_REGNO(N) \
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(TARGET_ABI_GNU \
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(TARGET_ABI_GNU \
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|| (int) (N) < MMIX_RETURN_VALUE_REGNUM \
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|| (int) (N) < MMIX_RETURN_VALUE_REGNUM \
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|| (int) (N) > MMIX_LAST_STACK_REGISTER_REGNUM \
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|| (int) (N) > MMIX_LAST_STACK_REGISTER_REGNUM \
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|| cfun == NULL \
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|| cfun == NULL \
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|| cfun->machine == NULL \
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|| cfun->machine == NULL \
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|| cfun->machine->in_prologue \
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|| cfun->machine->in_prologue \
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? (N) : ((N) - MMIX_RETURN_VALUE_REGNUM \
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? (N) : ((N) - MMIX_RETURN_VALUE_REGNUM \
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+ cfun->machine->highest_saved_stack_register + 1))
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+ cfun->machine->highest_saved_stack_register + 1))
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/* The %d in "POP %d,0". */
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/* The %d in "POP %d,0". */
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#define MMIX_POP_ARGUMENT() \
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#define MMIX_POP_ARGUMENT() \
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((! TARGET_ABI_GNU \
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((! TARGET_ABI_GNU \
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&& current_function_return_rtx != NULL \
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&& current_function_return_rtx != NULL \
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&& ! current_function_returns_struct) \
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&& ! current_function_returns_struct) \
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? (GET_CODE (current_function_return_rtx) == PARALLEL \
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? (GET_CODE (current_function_return_rtx) == PARALLEL \
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? GET_NUM_ELEM (XVEC (current_function_return_rtx, 0)) : 1) \
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? GET_NUM_ELEM (XVEC (current_function_return_rtx, 0)) : 1) \
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: 0)
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: 0)
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/* The canonical saved comparison operands for non-cc0 machines, set in
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/* The canonical saved comparison operands for non-cc0 machines, set in
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the compare expander. */
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the compare expander. */
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rtx mmix_compare_op0;
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rtx mmix_compare_op0;
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rtx mmix_compare_op1;
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rtx mmix_compare_op1;
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/* Declarations of locals. */
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/* Declarations of locals. */
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/* Intermediate for insn output. */
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/* Intermediate for insn output. */
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static int mmix_output_destination_register;
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static int mmix_output_destination_register;
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static void mmix_output_shiftvalue_op_from_str
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static void mmix_output_shiftvalue_op_from_str
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(FILE *, const char *, HOST_WIDEST_INT);
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(FILE *, const char *, HOST_WIDEST_INT);
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static void mmix_output_shifted_value (FILE *, HOST_WIDEST_INT);
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static void mmix_output_shifted_value (FILE *, HOST_WIDEST_INT);
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static void mmix_output_condition (FILE *, rtx, int);
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static void mmix_output_condition (FILE *, rtx, int);
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static HOST_WIDEST_INT mmix_intval (rtx);
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static HOST_WIDEST_INT mmix_intval (rtx);
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static void mmix_output_octa (FILE *, HOST_WIDEST_INT, int);
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static void mmix_output_octa (FILE *, HOST_WIDEST_INT, int);
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static bool mmix_assemble_integer (rtx, unsigned int, int);
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static bool mmix_assemble_integer (rtx, unsigned int, int);
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static struct machine_function *mmix_init_machine_status (void);
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static struct machine_function *mmix_init_machine_status (void);
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static void mmix_encode_section_info (tree, rtx, int);
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static void mmix_encode_section_info (tree, rtx, int);
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static const char *mmix_strip_name_encoding (const char *);
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static const char *mmix_strip_name_encoding (const char *);
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static void mmix_emit_sp_add (HOST_WIDE_INT offset);
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static void mmix_emit_sp_add (HOST_WIDE_INT offset);
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static void mmix_target_asm_function_prologue (FILE *, HOST_WIDE_INT);
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static void mmix_target_asm_function_prologue (FILE *, HOST_WIDE_INT);
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static void mmix_target_asm_function_end_prologue (FILE *);
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static void mmix_target_asm_function_end_prologue (FILE *);
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static void mmix_target_asm_function_epilogue (FILE *, HOST_WIDE_INT);
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static void mmix_target_asm_function_epilogue (FILE *, HOST_WIDE_INT);
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static void mmix_reorg (void);
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static void mmix_reorg (void);
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static void mmix_asm_output_mi_thunk
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static void mmix_asm_output_mi_thunk
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(FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree);
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(FILE *, tree, HOST_WIDE_INT, HOST_WIDE_INT, tree);
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static void mmix_setup_incoming_varargs
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static void mmix_setup_incoming_varargs
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(CUMULATIVE_ARGS *, enum machine_mode, tree, int *, int);
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(CUMULATIVE_ARGS *, enum machine_mode, tree, int *, int);
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static void mmix_file_start (void);
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static void mmix_file_start (void);
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static void mmix_file_end (void);
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static void mmix_file_end (void);
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static bool mmix_rtx_costs (rtx, int, int, int *);
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static bool mmix_rtx_costs (rtx, int, int, int *);
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static rtx mmix_struct_value_rtx (tree, int);
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static rtx mmix_struct_value_rtx (tree, int);
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static bool mmix_pass_by_reference (const CUMULATIVE_ARGS *,
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static bool mmix_pass_by_reference (const CUMULATIVE_ARGS *,
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enum machine_mode, tree, bool);
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enum machine_mode, tree, bool);
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/* Target structure macros. Listed by node. See `Using and Porting GCC'
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/* Target structure macros. Listed by node. See `Using and Porting GCC'
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for a general description. */
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for a general description. */
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/* Node: Function Entry */
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/* Node: Function Entry */
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#undef TARGET_ASM_BYTE_OP
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#undef TARGET_ASM_BYTE_OP
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#define TARGET_ASM_BYTE_OP NULL
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#define TARGET_ASM_BYTE_OP NULL
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#undef TARGET_ASM_ALIGNED_HI_OP
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#undef TARGET_ASM_ALIGNED_HI_OP
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#define TARGET_ASM_ALIGNED_HI_OP NULL
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#define TARGET_ASM_ALIGNED_HI_OP NULL
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#undef TARGET_ASM_ALIGNED_SI_OP
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#undef TARGET_ASM_ALIGNED_SI_OP
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#define TARGET_ASM_ALIGNED_SI_OP NULL
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#define TARGET_ASM_ALIGNED_SI_OP NULL
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#undef TARGET_ASM_ALIGNED_DI_OP
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#undef TARGET_ASM_ALIGNED_DI_OP
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#define TARGET_ASM_ALIGNED_DI_OP NULL
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#define TARGET_ASM_ALIGNED_DI_OP NULL
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#undef TARGET_ASM_INTEGER
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#undef TARGET_ASM_INTEGER
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#define TARGET_ASM_INTEGER mmix_assemble_integer
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#define TARGET_ASM_INTEGER mmix_assemble_integer
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#undef TARGET_ASM_FUNCTION_PROLOGUE
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#undef TARGET_ASM_FUNCTION_PROLOGUE
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#define TARGET_ASM_FUNCTION_PROLOGUE mmix_target_asm_function_prologue
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#define TARGET_ASM_FUNCTION_PROLOGUE mmix_target_asm_function_prologue
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#undef TARGET_ASM_FUNCTION_END_PROLOGUE
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#undef TARGET_ASM_FUNCTION_END_PROLOGUE
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#define TARGET_ASM_FUNCTION_END_PROLOGUE mmix_target_asm_function_end_prologue
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#define TARGET_ASM_FUNCTION_END_PROLOGUE mmix_target_asm_function_end_prologue
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#undef TARGET_ASM_FUNCTION_EPILOGUE
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#undef TARGET_ASM_FUNCTION_EPILOGUE
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#define TARGET_ASM_FUNCTION_EPILOGUE mmix_target_asm_function_epilogue
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#define TARGET_ASM_FUNCTION_EPILOGUE mmix_target_asm_function_epilogue
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#undef TARGET_ENCODE_SECTION_INFO
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#undef TARGET_ENCODE_SECTION_INFO
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#define TARGET_ENCODE_SECTION_INFO mmix_encode_section_info
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#define TARGET_ENCODE_SECTION_INFO mmix_encode_section_info
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#undef TARGET_STRIP_NAME_ENCODING
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#undef TARGET_STRIP_NAME_ENCODING
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#define TARGET_STRIP_NAME_ENCODING mmix_strip_name_encoding
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#define TARGET_STRIP_NAME_ENCODING mmix_strip_name_encoding
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#undef TARGET_ASM_OUTPUT_MI_THUNK
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#undef TARGET_ASM_OUTPUT_MI_THUNK
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#define TARGET_ASM_OUTPUT_MI_THUNK mmix_asm_output_mi_thunk
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#define TARGET_ASM_OUTPUT_MI_THUNK mmix_asm_output_mi_thunk
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#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
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#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
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#define TARGET_ASM_CAN_OUTPUT_MI_THUNK default_can_output_mi_thunk_no_vcall
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#define TARGET_ASM_CAN_OUTPUT_MI_THUNK default_can_output_mi_thunk_no_vcall
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#undef TARGET_ASM_FILE_START
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#undef TARGET_ASM_FILE_START
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#define TARGET_ASM_FILE_START mmix_file_start
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#define TARGET_ASM_FILE_START mmix_file_start
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#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
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#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
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#undef TARGET_ASM_FILE_END
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#undef TARGET_ASM_FILE_END
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#define TARGET_ASM_FILE_END mmix_file_end
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#define TARGET_ASM_FILE_END mmix_file_end
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#undef TARGET_RTX_COSTS
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#undef TARGET_RTX_COSTS
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#define TARGET_RTX_COSTS mmix_rtx_costs
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#define TARGET_RTX_COSTS mmix_rtx_costs
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#undef TARGET_ADDRESS_COST
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#undef TARGET_ADDRESS_COST
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#define TARGET_ADDRESS_COST hook_int_rtx_0
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#define TARGET_ADDRESS_COST hook_int_rtx_0
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#undef TARGET_MACHINE_DEPENDENT_REORG
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#undef TARGET_MACHINE_DEPENDENT_REORG
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#define TARGET_MACHINE_DEPENDENT_REORG mmix_reorg
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#define TARGET_MACHINE_DEPENDENT_REORG mmix_reorg
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#undef TARGET_PROMOTE_FUNCTION_ARGS
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#undef TARGET_PROMOTE_FUNCTION_ARGS
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#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_tree_true
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#define TARGET_PROMOTE_FUNCTION_ARGS hook_bool_tree_true
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#if 0
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#if 0
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/* Apparently not doing TRT if int < register-size. FIXME: Perhaps
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/* Apparently not doing TRT if int < register-size. FIXME: Perhaps
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FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
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FUNCTION_VALUE and LIBCALL_VALUE needs tweaking as some ports say. */
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#undef TARGET_PROMOTE_FUNCTION_RETURN
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#undef TARGET_PROMOTE_FUNCTION_RETURN
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#define TARGET_PROMOTE_FUNCTION_RETURN hook_bool_tree_true
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#define TARGET_PROMOTE_FUNCTION_RETURN hook_bool_tree_true
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#endif
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#endif
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#undef TARGET_STRUCT_VALUE_RTX
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#undef TARGET_STRUCT_VALUE_RTX
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#define TARGET_STRUCT_VALUE_RTX mmix_struct_value_rtx
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#define TARGET_STRUCT_VALUE_RTX mmix_struct_value_rtx
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#undef TARGET_SETUP_INCOMING_VARARGS
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#undef TARGET_SETUP_INCOMING_VARARGS
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#define TARGET_SETUP_INCOMING_VARARGS mmix_setup_incoming_varargs
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#define TARGET_SETUP_INCOMING_VARARGS mmix_setup_incoming_varargs
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#undef TARGET_PASS_BY_REFERENCE
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#undef TARGET_PASS_BY_REFERENCE
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#define TARGET_PASS_BY_REFERENCE mmix_pass_by_reference
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#define TARGET_PASS_BY_REFERENCE mmix_pass_by_reference
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#undef TARGET_CALLEE_COPIES
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#undef TARGET_CALLEE_COPIES
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#define TARGET_CALLEE_COPIES hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
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#define TARGET_CALLEE_COPIES hook_bool_CUMULATIVE_ARGS_mode_tree_bool_true
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#undef TARGET_DEFAULT_TARGET_FLAGS
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#undef TARGET_DEFAULT_TARGET_FLAGS
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#define TARGET_DEFAULT_TARGET_FLAGS TARGET_DEFAULT
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#define TARGET_DEFAULT_TARGET_FLAGS TARGET_DEFAULT
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|
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struct gcc_target targetm = TARGET_INITIALIZER;
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struct gcc_target targetm = TARGET_INITIALIZER;
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/* Functions that are expansions for target macros.
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/* Functions that are expansions for target macros.
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See Target Macros in `Using and Porting GCC'. */
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See Target Macros in `Using and Porting GCC'. */
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/* OVERRIDE_OPTIONS. */
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/* OVERRIDE_OPTIONS. */
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|
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void
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void
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mmix_override_options (void)
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mmix_override_options (void)
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{
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{
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/* Should we err or should we warn? Hmm. At least we must neutralize
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/* Should we err or should we warn? Hmm. At least we must neutralize
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it. For example the wrong kind of case-tables will be generated with
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it. For example the wrong kind of case-tables will be generated with
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PIC; we use absolute address items for mmixal compatibility. FIXME:
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PIC; we use absolute address items for mmixal compatibility. FIXME:
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They could be relative if we just elide them to after all pertinent
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They could be relative if we just elide them to after all pertinent
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labels. */
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labels. */
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if (flag_pic)
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if (flag_pic)
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{
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{
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warning (0, "-f%s not supported: ignored", (flag_pic > 1) ? "PIC" : "pic");
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warning (0, "-f%s not supported: ignored", (flag_pic > 1) ? "PIC" : "pic");
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flag_pic = 0;
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flag_pic = 0;
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}
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}
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}
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}
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/* INIT_EXPANDERS. */
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/* INIT_EXPANDERS. */
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|
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void
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void
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mmix_init_expanders (void)
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mmix_init_expanders (void)
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{
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{
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init_machine_status = mmix_init_machine_status;
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init_machine_status = mmix_init_machine_status;
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}
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}
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/* Set the per-function data. */
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/* Set the per-function data. */
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static struct machine_function *
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static struct machine_function *
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mmix_init_machine_status (void)
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mmix_init_machine_status (void)
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{
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{
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return ggc_alloc_cleared (sizeof (struct machine_function));
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return ggc_alloc_cleared (sizeof (struct machine_function));
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}
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}
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|
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/* DATA_ALIGNMENT.
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/* DATA_ALIGNMENT.
|
We have trouble getting the address of stuff that is located at other
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We have trouble getting the address of stuff that is located at other
|
than 32-bit alignments (GETA requirements), so try to give everything
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than 32-bit alignments (GETA requirements), so try to give everything
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at least 32-bit alignment. */
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at least 32-bit alignment. */
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|
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int
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int
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mmix_data_alignment (tree type ATTRIBUTE_UNUSED, int basic_align)
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mmix_data_alignment (tree type ATTRIBUTE_UNUSED, int basic_align)
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{
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{
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if (basic_align < 32)
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if (basic_align < 32)
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return 32;
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return 32;
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|
|
return basic_align;
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return basic_align;
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}
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}
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|
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/* CONSTANT_ALIGNMENT. */
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/* CONSTANT_ALIGNMENT. */
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|
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int
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int
|
mmix_constant_alignment (tree constant ATTRIBUTE_UNUSED, int basic_align)
|
mmix_constant_alignment (tree constant ATTRIBUTE_UNUSED, int basic_align)
|
{
|
{
|
if (basic_align < 32)
|
if (basic_align < 32)
|
return 32;
|
return 32;
|
|
|
return basic_align;
|
return basic_align;
|
}
|
}
|
|
|
/* LOCAL_ALIGNMENT. */
|
/* LOCAL_ALIGNMENT. */
|
|
|
int
|
int
|
mmix_local_alignment (tree type ATTRIBUTE_UNUSED, int basic_align)
|
mmix_local_alignment (tree type ATTRIBUTE_UNUSED, int basic_align)
|
{
|
{
|
if (basic_align < 32)
|
if (basic_align < 32)
|
return 32;
|
return 32;
|
|
|
return basic_align;
|
return basic_align;
|
}
|
}
|
|
|
/* CONDITIONAL_REGISTER_USAGE. */
|
/* CONDITIONAL_REGISTER_USAGE. */
|
|
|
void
|
void
|
mmix_conditional_register_usage (void)
|
mmix_conditional_register_usage (void)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (TARGET_ABI_GNU)
|
if (TARGET_ABI_GNU)
|
{
|
{
|
static const int gnu_abi_reg_alloc_order[]
|
static const int gnu_abi_reg_alloc_order[]
|
= MMIX_GNU_ABI_REG_ALLOC_ORDER;
|
= MMIX_GNU_ABI_REG_ALLOC_ORDER;
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
reg_alloc_order[i] = gnu_abi_reg_alloc_order[i];
|
reg_alloc_order[i] = gnu_abi_reg_alloc_order[i];
|
|
|
/* Change the default from the mmixware ABI. For the GNU ABI,
|
/* Change the default from the mmixware ABI. For the GNU ABI,
|
$15..$30 are call-saved just as $0..$14. There must be one
|
$15..$30 are call-saved just as $0..$14. There must be one
|
call-clobbered local register for the "hole" that holds the
|
call-clobbered local register for the "hole" that holds the
|
number of saved local registers saved by PUSHJ/PUSHGO during the
|
number of saved local registers saved by PUSHJ/PUSHGO during the
|
function call, receiving the return value at return. So best is
|
function call, receiving the return value at return. So best is
|
to use the highest, $31. It's already marked call-clobbered for
|
to use the highest, $31. It's already marked call-clobbered for
|
the mmixware ABI. */
|
the mmixware ABI. */
|
for (i = 15; i <= 30; i++)
|
for (i = 15; i <= 30; i++)
|
call_used_regs[i] = 0;
|
call_used_regs[i] = 0;
|
|
|
/* "Unfix" the parameter registers. */
|
/* "Unfix" the parameter registers. */
|
for (i = MMIX_RESERVED_GNU_ARG_0_REGNUM;
|
for (i = MMIX_RESERVED_GNU_ARG_0_REGNUM;
|
i < MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS;
|
i < MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS;
|
i++)
|
i++)
|
fixed_regs[i] = 0;
|
fixed_regs[i] = 0;
|
}
|
}
|
|
|
/* Step over the ":" in special register names. */
|
/* Step over the ":" in special register names. */
|
if (! TARGET_TOPLEVEL_SYMBOLS)
|
if (! TARGET_TOPLEVEL_SYMBOLS)
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
if (reg_names[i][0] == ':')
|
if (reg_names[i][0] == ':')
|
reg_names[i]++;
|
reg_names[i]++;
|
}
|
}
|
|
|
/* LOCAL_REGNO.
|
/* LOCAL_REGNO.
|
All registers that are part of the register stack and that will be
|
All registers that are part of the register stack and that will be
|
saved are local. */
|
saved are local. */
|
|
|
int
|
int
|
mmix_local_regno (int regno)
|
mmix_local_regno (int regno)
|
{
|
{
|
return regno <= MMIX_LAST_STACK_REGISTER_REGNUM && !call_used_regs[regno];
|
return regno <= MMIX_LAST_STACK_REGISTER_REGNUM && !call_used_regs[regno];
|
}
|
}
|
|
|
/* PREFERRED_RELOAD_CLASS.
|
/* PREFERRED_RELOAD_CLASS.
|
We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */
|
We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */
|
|
|
enum reg_class
|
enum reg_class
|
mmix_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, enum reg_class class)
|
mmix_preferred_reload_class (rtx x ATTRIBUTE_UNUSED, enum reg_class class)
|
{
|
{
|
/* FIXME: Revisit. */
|
/* FIXME: Revisit. */
|
return GET_CODE (x) == MOD && GET_MODE (x) == DImode
|
return GET_CODE (x) == MOD && GET_MODE (x) == DImode
|
? REMAINDER_REG : class;
|
? REMAINDER_REG : class;
|
}
|
}
|
|
|
/* PREFERRED_OUTPUT_RELOAD_CLASS.
|
/* PREFERRED_OUTPUT_RELOAD_CLASS.
|
We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */
|
We need to extend the reload class of REMAINDER_REG and HIMULT_REG. */
|
|
|
enum reg_class
|
enum reg_class
|
mmix_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED,
|
mmix_preferred_output_reload_class (rtx x ATTRIBUTE_UNUSED,
|
enum reg_class class)
|
enum reg_class class)
|
{
|
{
|
/* FIXME: Revisit. */
|
/* FIXME: Revisit. */
|
return GET_CODE (x) == MOD && GET_MODE (x) == DImode
|
return GET_CODE (x) == MOD && GET_MODE (x) == DImode
|
? REMAINDER_REG : class;
|
? REMAINDER_REG : class;
|
}
|
}
|
|
|
/* SECONDARY_RELOAD_CLASS.
|
/* SECONDARY_RELOAD_CLASS.
|
We need to reload regs of REMAINDER_REG and HIMULT_REG elsewhere. */
|
We need to reload regs of REMAINDER_REG and HIMULT_REG elsewhere. */
|
|
|
enum reg_class
|
enum reg_class
|
mmix_secondary_reload_class (enum reg_class class,
|
mmix_secondary_reload_class (enum reg_class class,
|
enum machine_mode mode ATTRIBUTE_UNUSED,
|
enum machine_mode mode ATTRIBUTE_UNUSED,
|
rtx x ATTRIBUTE_UNUSED,
|
rtx x ATTRIBUTE_UNUSED,
|
int in_p ATTRIBUTE_UNUSED)
|
int in_p ATTRIBUTE_UNUSED)
|
{
|
{
|
if (class == REMAINDER_REG
|
if (class == REMAINDER_REG
|
|| class == HIMULT_REG
|
|| class == HIMULT_REG
|
|| class == SYSTEM_REGS)
|
|| class == SYSTEM_REGS)
|
return GENERAL_REGS;
|
return GENERAL_REGS;
|
|
|
return NO_REGS;
|
return NO_REGS;
|
}
|
}
|
|
|
/* CONST_OK_FOR_LETTER_P. */
|
/* CONST_OK_FOR_LETTER_P. */
|
|
|
int
|
int
|
mmix_const_ok_for_letter_p (HOST_WIDE_INT value, int c)
|
mmix_const_ok_for_letter_p (HOST_WIDE_INT value, int c)
|
{
|
{
|
return
|
return
|
(c == 'I' ? value >= 0 && value <= 255
|
(c == 'I' ? value >= 0 && value <= 255
|
: c == 'J' ? value >= 0 && value <= 65535
|
: c == 'J' ? value >= 0 && value <= 65535
|
: c == 'K' ? value <= 0 && value >= -255
|
: c == 'K' ? value <= 0 && value >= -255
|
: c == 'L' ? mmix_shiftable_wyde_value (value)
|
: c == 'L' ? mmix_shiftable_wyde_value (value)
|
: c == 'M' ? value == 0
|
: c == 'M' ? value == 0
|
: c == 'N' ? mmix_shiftable_wyde_value (~value)
|
: c == 'N' ? mmix_shiftable_wyde_value (~value)
|
: c == 'O' ? (value == 3 || value == 5 || value == 9
|
: c == 'O' ? (value == 3 || value == 5 || value == 9
|
|| value == 17)
|
|| value == 17)
|
: 0);
|
: 0);
|
}
|
}
|
|
|
/* CONST_DOUBLE_OK_FOR_LETTER_P. */
|
/* CONST_DOUBLE_OK_FOR_LETTER_P. */
|
|
|
int
|
int
|
mmix_const_double_ok_for_letter_p (rtx value, int c)
|
mmix_const_double_ok_for_letter_p (rtx value, int c)
|
{
|
{
|
return
|
return
|
(c == 'G' ? value == CONST0_RTX (GET_MODE (value))
|
(c == 'G' ? value == CONST0_RTX (GET_MODE (value))
|
: 0);
|
: 0);
|
}
|
}
|
|
|
/* EXTRA_CONSTRAINT.
|
/* EXTRA_CONSTRAINT.
|
We need this since our constants are not always expressible as
|
We need this since our constants are not always expressible as
|
CONST_INT:s, but rather often as CONST_DOUBLE:s. */
|
CONST_INT:s, but rather often as CONST_DOUBLE:s. */
|
|
|
int
|
int
|
mmix_extra_constraint (rtx x, int c, int strict)
|
mmix_extra_constraint (rtx x, int c, int strict)
|
{
|
{
|
HOST_WIDEST_INT value;
|
HOST_WIDEST_INT value;
|
|
|
/* When checking for an address, we need to handle strict vs. non-strict
|
/* When checking for an address, we need to handle strict vs. non-strict
|
register checks. Don't use address_operand, but instead its
|
register checks. Don't use address_operand, but instead its
|
equivalent (its callee, which it is just a wrapper for),
|
equivalent (its callee, which it is just a wrapper for),
|
memory_operand_p and the strict-equivalent strict_memory_address_p. */
|
memory_operand_p and the strict-equivalent strict_memory_address_p. */
|
if (c == 'U')
|
if (c == 'U')
|
return
|
return
|
strict
|
strict
|
? strict_memory_address_p (Pmode, x)
|
? strict_memory_address_p (Pmode, x)
|
: memory_address_p (Pmode, x);
|
: memory_address_p (Pmode, x);
|
|
|
/* R asks whether x is to be loaded with GETA or something else. Right
|
/* R asks whether x is to be loaded with GETA or something else. Right
|
now, only a SYMBOL_REF and LABEL_REF can fit for
|
now, only a SYMBOL_REF and LABEL_REF can fit for
|
TARGET_BASE_ADDRESSES.
|
TARGET_BASE_ADDRESSES.
|
|
|
Only constant symbolic addresses apply. With TARGET_BASE_ADDRESSES,
|
Only constant symbolic addresses apply. With TARGET_BASE_ADDRESSES,
|
we just allow straight LABEL_REF or SYMBOL_REFs with SYMBOL_REF_FLAG
|
we just allow straight LABEL_REF or SYMBOL_REFs with SYMBOL_REF_FLAG
|
set right now; only function addresses and code labels. If we change
|
set right now; only function addresses and code labels. If we change
|
to let SYMBOL_REF_FLAG be set on other symbols, we have to check
|
to let SYMBOL_REF_FLAG be set on other symbols, we have to check
|
inside CONST expressions. When TARGET_BASE_ADDRESSES is not in
|
inside CONST expressions. When TARGET_BASE_ADDRESSES is not in
|
effect, a "raw" constant check together with mmix_constant_address_p
|
effect, a "raw" constant check together with mmix_constant_address_p
|
is all that's needed; we want all constant addresses to be loaded
|
is all that's needed; we want all constant addresses to be loaded
|
with GETA then. */
|
with GETA then. */
|
if (c == 'R')
|
if (c == 'R')
|
return
|
return
|
GET_CODE (x) != CONST_INT && GET_CODE (x) != CONST_DOUBLE
|
GET_CODE (x) != CONST_INT && GET_CODE (x) != CONST_DOUBLE
|
&& mmix_constant_address_p (x)
|
&& mmix_constant_address_p (x)
|
&& (! TARGET_BASE_ADDRESSES
|
&& (! TARGET_BASE_ADDRESSES
|
|| (GET_CODE (x) == LABEL_REF
|
|| (GET_CODE (x) == LABEL_REF
|
|| (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_FLAG (x))));
|
|| (GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_FLAG (x))));
|
|
|
if (GET_CODE (x) != CONST_DOUBLE || GET_MODE (x) != VOIDmode)
|
if (GET_CODE (x) != CONST_DOUBLE || GET_MODE (x) != VOIDmode)
|
return 0;
|
return 0;
|
|
|
value = mmix_intval (x);
|
value = mmix_intval (x);
|
|
|
/* We used to map Q->J, R->K, S->L, T->N, U->O, but we don't have to any
|
/* We used to map Q->J, R->K, S->L, T->N, U->O, but we don't have to any
|
more ('U' taken for address_operand, 'R' similarly). Some letters map
|
more ('U' taken for address_operand, 'R' similarly). Some letters map
|
outside of CONST_INT, though; we still use 'S' and 'T'. */
|
outside of CONST_INT, though; we still use 'S' and 'T'. */
|
if (c == 'S')
|
if (c == 'S')
|
return mmix_shiftable_wyde_value (value);
|
return mmix_shiftable_wyde_value (value);
|
else if (c == 'T')
|
else if (c == 'T')
|
return mmix_shiftable_wyde_value (~value);
|
return mmix_shiftable_wyde_value (~value);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* DYNAMIC_CHAIN_ADDRESS. */
|
/* DYNAMIC_CHAIN_ADDRESS. */
|
|
|
rtx
|
rtx
|
mmix_dynamic_chain_address (rtx frame)
|
mmix_dynamic_chain_address (rtx frame)
|
{
|
{
|
/* FIXME: the frame-pointer is stored at offset -8 from the current
|
/* FIXME: the frame-pointer is stored at offset -8 from the current
|
frame-pointer. Unfortunately, the caller assumes that a
|
frame-pointer. Unfortunately, the caller assumes that a
|
frame-pointer is present for *all* previous frames. There should be
|
frame-pointer is present for *all* previous frames. There should be
|
a way to say that that cannot be done, like for RETURN_ADDR_RTX. */
|
a way to say that that cannot be done, like for RETURN_ADDR_RTX. */
|
return plus_constant (frame, -8);
|
return plus_constant (frame, -8);
|
}
|
}
|
|
|
/* STARTING_FRAME_OFFSET. */
|
/* STARTING_FRAME_OFFSET. */
|
|
|
int
|
int
|
mmix_starting_frame_offset (void)
|
mmix_starting_frame_offset (void)
|
{
|
{
|
/* The old frame pointer is in the slot below the new one, so
|
/* The old frame pointer is in the slot below the new one, so
|
FIRST_PARM_OFFSET does not need to depend on whether the
|
FIRST_PARM_OFFSET does not need to depend on whether the
|
frame-pointer is needed or not. We have to adjust for the register
|
frame-pointer is needed or not. We have to adjust for the register
|
stack pointer being located below the saved frame pointer.
|
stack pointer being located below the saved frame pointer.
|
Similarly, we store the return address on the stack too, for
|
Similarly, we store the return address on the stack too, for
|
exception handling, and always if we save the register stack pointer. */
|
exception handling, and always if we save the register stack pointer. */
|
return
|
return
|
(-8
|
(-8
|
+ (MMIX_CFUN_HAS_LANDING_PAD
|
+ (MMIX_CFUN_HAS_LANDING_PAD
|
? -16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? -8 : 0)));
|
? -16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? -8 : 0)));
|
}
|
}
|
|
|
/* RETURN_ADDR_RTX. */
|
/* RETURN_ADDR_RTX. */
|
|
|
rtx
|
rtx
|
mmix_return_addr_rtx (int count, rtx frame ATTRIBUTE_UNUSED)
|
mmix_return_addr_rtx (int count, rtx frame ATTRIBUTE_UNUSED)
|
{
|
{
|
return count == 0
|
return count == 0
|
? (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS
|
? (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS
|
/* FIXME: Set frame_alias_set on the following. (Why?)
|
/* FIXME: Set frame_alias_set on the following. (Why?)
|
See mmix_initial_elimination_offset for the reason we can't use
|
See mmix_initial_elimination_offset for the reason we can't use
|
get_hard_reg_initial_val for both. Always using a stack slot
|
get_hard_reg_initial_val for both. Always using a stack slot
|
and not a register would be suboptimal. */
|
and not a register would be suboptimal. */
|
? validize_mem (gen_rtx_MEM (Pmode, plus_constant (frame_pointer_rtx, -16)))
|
? validize_mem (gen_rtx_MEM (Pmode, plus_constant (frame_pointer_rtx, -16)))
|
: get_hard_reg_initial_val (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM))
|
: get_hard_reg_initial_val (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM))
|
: NULL_RTX;
|
: NULL_RTX;
|
}
|
}
|
|
|
/* SETUP_FRAME_ADDRESSES. */
|
/* SETUP_FRAME_ADDRESSES. */
|
|
|
void
|
void
|
mmix_setup_frame_addresses (void)
|
mmix_setup_frame_addresses (void)
|
{
|
{
|
/* Nothing needed at the moment. */
|
/* Nothing needed at the moment. */
|
}
|
}
|
|
|
/* The difference between the (imaginary) frame pointer and the stack
|
/* The difference between the (imaginary) frame pointer and the stack
|
pointer. Used to eliminate the frame pointer. */
|
pointer. Used to eliminate the frame pointer. */
|
|
|
int
|
int
|
mmix_initial_elimination_offset (int fromreg, int toreg)
|
mmix_initial_elimination_offset (int fromreg, int toreg)
|
{
|
{
|
int regno;
|
int regno;
|
int fp_sp_offset
|
int fp_sp_offset
|
= (get_frame_size () + current_function_outgoing_args_size + 7) & ~7;
|
= (get_frame_size () + current_function_outgoing_args_size + 7) & ~7;
|
|
|
/* There is no actual offset between these two virtual values, but for
|
/* There is no actual offset between these two virtual values, but for
|
the frame-pointer, we have the old one in the stack position below
|
the frame-pointer, we have the old one in the stack position below
|
it, so the offset for the frame-pointer to the stack-pointer is one
|
it, so the offset for the frame-pointer to the stack-pointer is one
|
octabyte larger. */
|
octabyte larger. */
|
if (fromreg == MMIX_ARG_POINTER_REGNUM
|
if (fromreg == MMIX_ARG_POINTER_REGNUM
|
&& toreg == MMIX_FRAME_POINTER_REGNUM)
|
&& toreg == MMIX_FRAME_POINTER_REGNUM)
|
return 0;
|
return 0;
|
|
|
/* The difference is the size of local variables plus the size of
|
/* The difference is the size of local variables plus the size of
|
outgoing function arguments that would normally be passed as
|
outgoing function arguments that would normally be passed as
|
registers but must be passed on stack because we're out of
|
registers but must be passed on stack because we're out of
|
function-argument registers. Only global saved registers are
|
function-argument registers. Only global saved registers are
|
counted; the others go on the register stack.
|
counted; the others go on the register stack.
|
|
|
The frame-pointer is counted too if it is what is eliminated, as we
|
The frame-pointer is counted too if it is what is eliminated, as we
|
need to balance the offset for it from STARTING_FRAME_OFFSET.
|
need to balance the offset for it from STARTING_FRAME_OFFSET.
|
|
|
Also add in the slot for the register stack pointer we save if we
|
Also add in the slot for the register stack pointer we save if we
|
have a landing pad.
|
have a landing pad.
|
|
|
Unfortunately, we can't access $0..$14, from unwinder code easily, so
|
Unfortunately, we can't access $0..$14, from unwinder code easily, so
|
store the return address in a frame slot too. FIXME: Only for
|
store the return address in a frame slot too. FIXME: Only for
|
non-leaf functions. FIXME: Always with a landing pad, because it's
|
non-leaf functions. FIXME: Always with a landing pad, because it's
|
hard to know whether we need the other at the time we know we need
|
hard to know whether we need the other at the time we know we need
|
the offset for one (and have to state it). It's a kludge until we
|
the offset for one (and have to state it). It's a kludge until we
|
can express the register stack in the EH frame info.
|
can express the register stack in the EH frame info.
|
|
|
We have to do alignment here; get_frame_size will not return a
|
We have to do alignment here; get_frame_size will not return a
|
multiple of STACK_BOUNDARY. FIXME: Add note in manual. */
|
multiple of STACK_BOUNDARY. FIXME: Add note in manual. */
|
|
|
for (regno = MMIX_FIRST_GLOBAL_REGNUM;
|
for (regno = MMIX_FIRST_GLOBAL_REGNUM;
|
regno <= 255;
|
regno <= 255;
|
regno++)
|
regno++)
|
if ((regs_ever_live[regno] && ! call_used_regs[regno])
|
if ((regs_ever_live[regno] && ! call_used_regs[regno])
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
fp_sp_offset += 8;
|
fp_sp_offset += 8;
|
|
|
return fp_sp_offset
|
return fp_sp_offset
|
+ (MMIX_CFUN_HAS_LANDING_PAD
|
+ (MMIX_CFUN_HAS_LANDING_PAD
|
? 16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? 8 : 0))
|
? 16 : (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS ? 8 : 0))
|
+ (fromreg == MMIX_ARG_POINTER_REGNUM ? 0 : 8);
|
+ (fromreg == MMIX_ARG_POINTER_REGNUM ? 0 : 8);
|
}
|
}
|
|
|
/* Return an rtx for a function argument to go in a register, and 0 for
|
/* Return an rtx for a function argument to go in a register, and 0 for
|
one that must go on stack. */
|
one that must go on stack. */
|
|
|
rtx
|
rtx
|
mmix_function_arg (const CUMULATIVE_ARGS *argsp,
|
mmix_function_arg (const CUMULATIVE_ARGS *argsp,
|
enum machine_mode mode,
|
enum machine_mode mode,
|
tree type,
|
tree type,
|
int named ATTRIBUTE_UNUSED,
|
int named ATTRIBUTE_UNUSED,
|
int incoming)
|
int incoming)
|
{
|
{
|
/* Last-argument marker. */
|
/* Last-argument marker. */
|
if (type == void_type_node)
|
if (type == void_type_node)
|
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS)
|
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS)
|
? gen_rtx_REG (mode,
|
? gen_rtx_REG (mode,
|
(incoming
|
(incoming
|
? MMIX_FIRST_INCOMING_ARG_REGNUM
|
? MMIX_FIRST_INCOMING_ARG_REGNUM
|
: MMIX_FIRST_ARG_REGNUM) + argsp->regs)
|
: MMIX_FIRST_ARG_REGNUM) + argsp->regs)
|
: NULL_RTX;
|
: NULL_RTX;
|
|
|
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS
|
return (argsp->regs < MMIX_MAX_ARGS_IN_REGS
|
&& !targetm.calls.must_pass_in_stack (mode, type)
|
&& !targetm.calls.must_pass_in_stack (mode, type)
|
&& (GET_MODE_BITSIZE (mode) <= 64
|
&& (GET_MODE_BITSIZE (mode) <= 64
|
|| argsp->lib
|
|| argsp->lib
|
|| TARGET_LIBFUNC))
|
|| TARGET_LIBFUNC))
|
? gen_rtx_REG (mode,
|
? gen_rtx_REG (mode,
|
(incoming
|
(incoming
|
? MMIX_FIRST_INCOMING_ARG_REGNUM
|
? MMIX_FIRST_INCOMING_ARG_REGNUM
|
: MMIX_FIRST_ARG_REGNUM)
|
: MMIX_FIRST_ARG_REGNUM)
|
+ argsp->regs)
|
+ argsp->regs)
|
: NULL_RTX;
|
: NULL_RTX;
|
}
|
}
|
|
|
/* Returns nonzero for everything that goes by reference, 0 for
|
/* Returns nonzero for everything that goes by reference, 0 for
|
everything that goes by value. */
|
everything that goes by value. */
|
|
|
static bool
|
static bool
|
mmix_pass_by_reference (const CUMULATIVE_ARGS *argsp, enum machine_mode mode,
|
mmix_pass_by_reference (const CUMULATIVE_ARGS *argsp, enum machine_mode mode,
|
tree type, bool named ATTRIBUTE_UNUSED)
|
tree type, bool named ATTRIBUTE_UNUSED)
|
{
|
{
|
/* FIXME: Check: I'm not sure the must_pass_in_stack check is
|
/* FIXME: Check: I'm not sure the must_pass_in_stack check is
|
necessary. */
|
necessary. */
|
if (targetm.calls.must_pass_in_stack (mode, type))
|
if (targetm.calls.must_pass_in_stack (mode, type))
|
return true;
|
return true;
|
|
|
if (MMIX_FUNCTION_ARG_SIZE (mode, type) > 8
|
if (MMIX_FUNCTION_ARG_SIZE (mode, type) > 8
|
&& !TARGET_LIBFUNC
|
&& !TARGET_LIBFUNC
|
&& (!argsp || !argsp->lib))
|
&& (!argsp || !argsp->lib))
|
return true;
|
return true;
|
|
|
return false;
|
return false;
|
}
|
}
|
|
|
/* Return nonzero if regno is a register number where a parameter is
|
/* Return nonzero if regno is a register number where a parameter is
|
passed, and 0 otherwise. */
|
passed, and 0 otherwise. */
|
|
|
int
|
int
|
mmix_function_arg_regno_p (int regno, int incoming)
|
mmix_function_arg_regno_p (int regno, int incoming)
|
{
|
{
|
int first_arg_regnum
|
int first_arg_regnum
|
= incoming ? MMIX_FIRST_INCOMING_ARG_REGNUM : MMIX_FIRST_ARG_REGNUM;
|
= incoming ? MMIX_FIRST_INCOMING_ARG_REGNUM : MMIX_FIRST_ARG_REGNUM;
|
|
|
return regno >= first_arg_regnum
|
return regno >= first_arg_regnum
|
&& regno < first_arg_regnum + MMIX_MAX_ARGS_IN_REGS;
|
&& regno < first_arg_regnum + MMIX_MAX_ARGS_IN_REGS;
|
}
|
}
|
|
|
/* FUNCTION_OUTGOING_VALUE. */
|
/* FUNCTION_OUTGOING_VALUE. */
|
|
|
rtx
|
rtx
|
mmix_function_outgoing_value (tree valtype, tree func ATTRIBUTE_UNUSED)
|
mmix_function_outgoing_value (tree valtype, tree func ATTRIBUTE_UNUSED)
|
{
|
{
|
enum machine_mode mode = TYPE_MODE (valtype);
|
enum machine_mode mode = TYPE_MODE (valtype);
|
enum machine_mode cmode;
|
enum machine_mode cmode;
|
int first_val_regnum = MMIX_OUTGOING_RETURN_VALUE_REGNUM;
|
int first_val_regnum = MMIX_OUTGOING_RETURN_VALUE_REGNUM;
|
rtx vec[MMIX_MAX_REGS_FOR_VALUE];
|
rtx vec[MMIX_MAX_REGS_FOR_VALUE];
|
int i;
|
int i;
|
int nregs;
|
int nregs;
|
|
|
/* Return values that fit in a register need no special handling.
|
/* Return values that fit in a register need no special handling.
|
There's no register hole when parameters are passed in global
|
There's no register hole when parameters are passed in global
|
registers. */
|
registers. */
|
if (TARGET_ABI_GNU
|
if (TARGET_ABI_GNU
|
|| GET_MODE_BITSIZE (mode) <= BITS_PER_WORD)
|
|| GET_MODE_BITSIZE (mode) <= BITS_PER_WORD)
|
return
|
return
|
gen_rtx_REG (mode, MMIX_OUTGOING_RETURN_VALUE_REGNUM);
|
gen_rtx_REG (mode, MMIX_OUTGOING_RETURN_VALUE_REGNUM);
|
|
|
if (COMPLEX_MODE_P (mode))
|
if (COMPLEX_MODE_P (mode))
|
/* A complex type, made up of components. */
|
/* A complex type, made up of components. */
|
cmode = TYPE_MODE (TREE_TYPE (valtype));
|
cmode = TYPE_MODE (TREE_TYPE (valtype));
|
else
|
else
|
{
|
{
|
/* Of the other larger-than-register modes, we only support
|
/* Of the other larger-than-register modes, we only support
|
scalar mode TImode. (At least, that's the only one that's
|
scalar mode TImode. (At least, that's the only one that's
|
been rudimentally tested.) Make sure we're alerted for
|
been rudimentally tested.) Make sure we're alerted for
|
unexpected cases. */
|
unexpected cases. */
|
if (mode != TImode)
|
if (mode != TImode)
|
sorry ("support for mode %qs", GET_MODE_NAME (mode));
|
sorry ("support for mode %qs", GET_MODE_NAME (mode));
|
|
|
/* In any case, we will fill registers to the natural size. */
|
/* In any case, we will fill registers to the natural size. */
|
cmode = DImode;
|
cmode = DImode;
|
}
|
}
|
|
|
nregs = ((GET_MODE_BITSIZE (mode) + BITS_PER_WORD - 1) / BITS_PER_WORD);
|
nregs = ((GET_MODE_BITSIZE (mode) + BITS_PER_WORD - 1) / BITS_PER_WORD);
|
|
|
/* We need to take care of the effect of the register hole on return
|
/* We need to take care of the effect of the register hole on return
|
values of large sizes; the last register will appear as the first
|
values of large sizes; the last register will appear as the first
|
register, with the rest shifted. (For complex modes, this is just
|
register, with the rest shifted. (For complex modes, this is just
|
swapped registers.) */
|
swapped registers.) */
|
|
|
if (nregs > MMIX_MAX_REGS_FOR_VALUE)
|
if (nregs > MMIX_MAX_REGS_FOR_VALUE)
|
internal_error ("too large function value type, needs %d registers,\
|
internal_error ("too large function value type, needs %d registers,\
|
have only %d registers for this", nregs, MMIX_MAX_REGS_FOR_VALUE);
|
have only %d registers for this", nregs, MMIX_MAX_REGS_FOR_VALUE);
|
|
|
/* FIXME: Maybe we should handle structure values like this too
|
/* FIXME: Maybe we should handle structure values like this too
|
(adjusted for BLKmode), perhaps for both ABI:s. */
|
(adjusted for BLKmode), perhaps for both ABI:s. */
|
for (i = 0; i < nregs - 1; i++)
|
for (i = 0; i < nregs - 1; i++)
|
vec[i]
|
vec[i]
|
= gen_rtx_EXPR_LIST (VOIDmode,
|
= gen_rtx_EXPR_LIST (VOIDmode,
|
gen_rtx_REG (cmode, first_val_regnum + i),
|
gen_rtx_REG (cmode, first_val_regnum + i),
|
GEN_INT ((i + 1) * BITS_PER_UNIT));
|
GEN_INT ((i + 1) * BITS_PER_UNIT));
|
|
|
vec[nregs - 1]
|
vec[nregs - 1]
|
= gen_rtx_EXPR_LIST (VOIDmode,
|
= gen_rtx_EXPR_LIST (VOIDmode,
|
gen_rtx_REG (cmode, first_val_regnum + nregs - 1),
|
gen_rtx_REG (cmode, first_val_regnum + nregs - 1),
|
const0_rtx);
|
const0_rtx);
|
|
|
return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nregs, vec));
|
return gen_rtx_PARALLEL (VOIDmode, gen_rtvec_v (nregs, vec));
|
}
|
}
|
|
|
/* FUNCTION_VALUE_REGNO_P. */
|
/* FUNCTION_VALUE_REGNO_P. */
|
|
|
int
|
int
|
mmix_function_value_regno_p (int regno)
|
mmix_function_value_regno_p (int regno)
|
{
|
{
|
return regno == MMIX_RETURN_VALUE_REGNUM;
|
return regno == MMIX_RETURN_VALUE_REGNUM;
|
}
|
}
|
|
|
/* EH_RETURN_DATA_REGNO. */
|
/* EH_RETURN_DATA_REGNO. */
|
|
|
int
|
int
|
mmix_eh_return_data_regno (int n)
|
mmix_eh_return_data_regno (int n)
|
{
|
{
|
if (n >= 0 && n < 4)
|
if (n >= 0 && n < 4)
|
return MMIX_EH_RETURN_DATA_REGNO_START + n;
|
return MMIX_EH_RETURN_DATA_REGNO_START + n;
|
|
|
return INVALID_REGNUM;
|
return INVALID_REGNUM;
|
}
|
}
|
|
|
/* EH_RETURN_STACKADJ_RTX. */
|
/* EH_RETURN_STACKADJ_RTX. */
|
|
|
rtx
|
rtx
|
mmix_eh_return_stackadj_rtx (void)
|
mmix_eh_return_stackadj_rtx (void)
|
{
|
{
|
return gen_rtx_REG (Pmode, MMIX_EH_RETURN_STACKADJ_REGNUM);
|
return gen_rtx_REG (Pmode, MMIX_EH_RETURN_STACKADJ_REGNUM);
|
}
|
}
|
|
|
/* EH_RETURN_HANDLER_RTX. */
|
/* EH_RETURN_HANDLER_RTX. */
|
|
|
rtx
|
rtx
|
mmix_eh_return_handler_rtx (void)
|
mmix_eh_return_handler_rtx (void)
|
{
|
{
|
return gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
|
return gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM);
|
}
|
}
|
|
|
/* ASM_PREFERRED_EH_DATA_FORMAT. */
|
/* ASM_PREFERRED_EH_DATA_FORMAT. */
|
|
|
int
|
int
|
mmix_asm_preferred_eh_data_format (int code ATTRIBUTE_UNUSED,
|
mmix_asm_preferred_eh_data_format (int code ATTRIBUTE_UNUSED,
|
int global ATTRIBUTE_UNUSED)
|
int global ATTRIBUTE_UNUSED)
|
{
|
{
|
/* This is the default (was at 2001-07-20). Revisit when needed. */
|
/* This is the default (was at 2001-07-20). Revisit when needed. */
|
return DW_EH_PE_absptr;
|
return DW_EH_PE_absptr;
|
}
|
}
|
|
|
/* Make a note that we've seen the beginning of the prologue. This
|
/* Make a note that we've seen the beginning of the prologue. This
|
matters to whether we'll translate register numbers as calculated by
|
matters to whether we'll translate register numbers as calculated by
|
mmix_reorg. */
|
mmix_reorg. */
|
|
|
static void
|
static void
|
mmix_target_asm_function_prologue (FILE *stream ATTRIBUTE_UNUSED,
|
mmix_target_asm_function_prologue (FILE *stream ATTRIBUTE_UNUSED,
|
HOST_WIDE_INT framesize ATTRIBUTE_UNUSED)
|
HOST_WIDE_INT framesize ATTRIBUTE_UNUSED)
|
{
|
{
|
cfun->machine->in_prologue = 1;
|
cfun->machine->in_prologue = 1;
|
}
|
}
|
|
|
/* Make a note that we've seen the end of the prologue. */
|
/* Make a note that we've seen the end of the prologue. */
|
|
|
static void
|
static void
|
mmix_target_asm_function_end_prologue (FILE *stream ATTRIBUTE_UNUSED)
|
mmix_target_asm_function_end_prologue (FILE *stream ATTRIBUTE_UNUSED)
|
{
|
{
|
cfun->machine->in_prologue = 0;
|
cfun->machine->in_prologue = 0;
|
}
|
}
|
|
|
/* Implement TARGET_MACHINE_DEPENDENT_REORG. No actual rearrangements
|
/* Implement TARGET_MACHINE_DEPENDENT_REORG. No actual rearrangements
|
done here; just virtually by calculating the highest saved stack
|
done here; just virtually by calculating the highest saved stack
|
register number used to modify the register numbers at output time. */
|
register number used to modify the register numbers at output time. */
|
|
|
static void
|
static void
|
mmix_reorg (void)
|
mmix_reorg (void)
|
{
|
{
|
int regno;
|
int regno;
|
|
|
/* We put the number of the highest saved register-file register in a
|
/* We put the number of the highest saved register-file register in a
|
location convenient for the call-patterns to output. Note that we
|
location convenient for the call-patterns to output. Note that we
|
don't tell dwarf2 about these registers, since it can't restore them
|
don't tell dwarf2 about these registers, since it can't restore them
|
anyway. */
|
anyway. */
|
for (regno = MMIX_LAST_STACK_REGISTER_REGNUM;
|
for (regno = MMIX_LAST_STACK_REGISTER_REGNUM;
|
regno >= 0;
|
regno >= 0;
|
regno--)
|
regno--)
|
if ((regs_ever_live[regno] && !call_used_regs[regno])
|
if ((regs_ever_live[regno] && !call_used_regs[regno])
|
|| (regno == MMIX_FRAME_POINTER_REGNUM && frame_pointer_needed))
|
|| (regno == MMIX_FRAME_POINTER_REGNUM && frame_pointer_needed))
|
break;
|
break;
|
|
|
/* Regardless of whether they're saved (they might be just read), we
|
/* Regardless of whether they're saved (they might be just read), we
|
mustn't include registers that carry parameters. We could scan the
|
mustn't include registers that carry parameters. We could scan the
|
insns to see whether they're actually used (and indeed do other less
|
insns to see whether they're actually used (and indeed do other less
|
trivial register usage analysis and transformations), but it seems
|
trivial register usage analysis and transformations), but it seems
|
wasteful to optimize for unused parameter registers. As of
|
wasteful to optimize for unused parameter registers. As of
|
2002-04-30, regs_ever_live[n] seems to be set for only-reads too, but
|
2002-04-30, regs_ever_live[n] seems to be set for only-reads too, but
|
that might change. */
|
that might change. */
|
if (!TARGET_ABI_GNU && regno < current_function_args_info.regs - 1)
|
if (!TARGET_ABI_GNU && regno < current_function_args_info.regs - 1)
|
{
|
{
|
regno = current_function_args_info.regs - 1;
|
regno = current_function_args_info.regs - 1;
|
|
|
/* We don't want to let this cause us to go over the limit and make
|
/* We don't want to let this cause us to go over the limit and make
|
incoming parameter registers be misnumbered and treating the last
|
incoming parameter registers be misnumbered and treating the last
|
parameter register and incoming return value register call-saved.
|
parameter register and incoming return value register call-saved.
|
Stop things at the unmodified scheme. */
|
Stop things at the unmodified scheme. */
|
if (regno > MMIX_RETURN_VALUE_REGNUM - 1)
|
if (regno > MMIX_RETURN_VALUE_REGNUM - 1)
|
regno = MMIX_RETURN_VALUE_REGNUM - 1;
|
regno = MMIX_RETURN_VALUE_REGNUM - 1;
|
}
|
}
|
|
|
cfun->machine->highest_saved_stack_register = regno;
|
cfun->machine->highest_saved_stack_register = regno;
|
}
|
}
|
|
|
/* TARGET_ASM_FUNCTION_EPILOGUE. */
|
/* TARGET_ASM_FUNCTION_EPILOGUE. */
|
|
|
static void
|
static void
|
mmix_target_asm_function_epilogue (FILE *stream,
|
mmix_target_asm_function_epilogue (FILE *stream,
|
HOST_WIDE_INT locals_size ATTRIBUTE_UNUSED)
|
HOST_WIDE_INT locals_size ATTRIBUTE_UNUSED)
|
{
|
{
|
/* Emit an \n for readability of the generated assembly. */
|
/* Emit an \n for readability of the generated assembly. */
|
fputc ('\n', stream);
|
fputc ('\n', stream);
|
}
|
}
|
|
|
/* TARGET_ASM_OUTPUT_MI_THUNK. */
|
/* TARGET_ASM_OUTPUT_MI_THUNK. */
|
|
|
static void
|
static void
|
mmix_asm_output_mi_thunk (FILE *stream,
|
mmix_asm_output_mi_thunk (FILE *stream,
|
tree fndecl ATTRIBUTE_UNUSED,
|
tree fndecl ATTRIBUTE_UNUSED,
|
HOST_WIDE_INT delta,
|
HOST_WIDE_INT delta,
|
HOST_WIDE_INT vcall_offset ATTRIBUTE_UNUSED,
|
HOST_WIDE_INT vcall_offset ATTRIBUTE_UNUSED,
|
tree func)
|
tree func)
|
{
|
{
|
/* If you define TARGET_STRUCT_VALUE_RTX that returns 0 (i.e. pass
|
/* If you define TARGET_STRUCT_VALUE_RTX that returns 0 (i.e. pass
|
location of structure to return as invisible first argument), you
|
location of structure to return as invisible first argument), you
|
need to tweak this code too. */
|
need to tweak this code too. */
|
const char *regname = reg_names[MMIX_FIRST_INCOMING_ARG_REGNUM];
|
const char *regname = reg_names[MMIX_FIRST_INCOMING_ARG_REGNUM];
|
|
|
if (delta >= 0 && delta < 65536)
|
if (delta >= 0 && delta < 65536)
|
fprintf (stream, "\tINCL %s,%d\n", regname, (int)delta);
|
fprintf (stream, "\tINCL %s,%d\n", regname, (int)delta);
|
else if (delta < 0 && delta >= -255)
|
else if (delta < 0 && delta >= -255)
|
fprintf (stream, "\tSUBU %s,%s,%d\n", regname, regname, (int)-delta);
|
fprintf (stream, "\tSUBU %s,%s,%d\n", regname, regname, (int)-delta);
|
else
|
else
|
{
|
{
|
mmix_output_register_setting (stream, 255, delta, 1);
|
mmix_output_register_setting (stream, 255, delta, 1);
|
fprintf (stream, "\tADDU %s,%s,$255\n", regname, regname);
|
fprintf (stream, "\tADDU %s,%s,$255\n", regname, regname);
|
}
|
}
|
|
|
fprintf (stream, "\tJMP ");
|
fprintf (stream, "\tJMP ");
|
assemble_name (stream, XSTR (XEXP (DECL_RTL (func), 0), 0));
|
assemble_name (stream, XSTR (XEXP (DECL_RTL (func), 0), 0));
|
fprintf (stream, "\n");
|
fprintf (stream, "\n");
|
}
|
}
|
|
|
/* FUNCTION_PROFILER. */
|
/* FUNCTION_PROFILER. */
|
|
|
void
|
void
|
mmix_function_profiler (FILE *stream ATTRIBUTE_UNUSED,
|
mmix_function_profiler (FILE *stream ATTRIBUTE_UNUSED,
|
int labelno ATTRIBUTE_UNUSED)
|
int labelno ATTRIBUTE_UNUSED)
|
{
|
{
|
sorry ("function_profiler support for MMIX");
|
sorry ("function_profiler support for MMIX");
|
}
|
}
|
|
|
/* Worker function for TARGET_SETUP_INCOMING_VARARGS. For the moment,
|
/* Worker function for TARGET_SETUP_INCOMING_VARARGS. For the moment,
|
let's stick to pushing argument registers on the stack. Later, we
|
let's stick to pushing argument registers on the stack. Later, we
|
can parse all arguments in registers, to improve performance. */
|
can parse all arguments in registers, to improve performance. */
|
|
|
static void
|
static void
|
mmix_setup_incoming_varargs (CUMULATIVE_ARGS *args_so_farp,
|
mmix_setup_incoming_varargs (CUMULATIVE_ARGS *args_so_farp,
|
enum machine_mode mode,
|
enum machine_mode mode,
|
tree vartype,
|
tree vartype,
|
int *pretend_sizep,
|
int *pretend_sizep,
|
int second_time ATTRIBUTE_UNUSED)
|
int second_time ATTRIBUTE_UNUSED)
|
{
|
{
|
/* The last named variable has been handled, but
|
/* The last named variable has been handled, but
|
args_so_farp has not been advanced for it. */
|
args_so_farp has not been advanced for it. */
|
if (args_so_farp->regs + 1 < MMIX_MAX_ARGS_IN_REGS)
|
if (args_so_farp->regs + 1 < MMIX_MAX_ARGS_IN_REGS)
|
*pretend_sizep = (MMIX_MAX_ARGS_IN_REGS - (args_so_farp->regs + 1)) * 8;
|
*pretend_sizep = (MMIX_MAX_ARGS_IN_REGS - (args_so_farp->regs + 1)) * 8;
|
|
|
/* We assume that one argument takes up one register here. That should
|
/* We assume that one argument takes up one register here. That should
|
be true until we start messing with multi-reg parameters. */
|
be true until we start messing with multi-reg parameters. */
|
if ((7 + (MMIX_FUNCTION_ARG_SIZE (mode, vartype))) / 8 != 1)
|
if ((7 + (MMIX_FUNCTION_ARG_SIZE (mode, vartype))) / 8 != 1)
|
internal_error ("MMIX Internal: Last named vararg would not fit in a register");
|
internal_error ("MMIX Internal: Last named vararg would not fit in a register");
|
}
|
}
|
|
|
/* TRAMPOLINE_SIZE. */
|
/* TRAMPOLINE_SIZE. */
|
/* Four 4-byte insns plus two 8-byte values. */
|
/* Four 4-byte insns plus two 8-byte values. */
|
int mmix_trampoline_size = 32;
|
int mmix_trampoline_size = 32;
|
|
|
|
|
/* TRAMPOLINE_TEMPLATE. */
|
/* TRAMPOLINE_TEMPLATE. */
|
|
|
void
|
void
|
mmix_trampoline_template (FILE *stream)
|
mmix_trampoline_template (FILE *stream)
|
{
|
{
|
/* Read a value into the static-chain register and jump somewhere. The
|
/* Read a value into the static-chain register and jump somewhere. The
|
static chain is stored at offset 16, and the function address is
|
static chain is stored at offset 16, and the function address is
|
stored at offset 24. */
|
stored at offset 24. */
|
/* FIXME: GCC copies this using *intsize* (tetra), when it should use
|
/* FIXME: GCC copies this using *intsize* (tetra), when it should use
|
register size (octa). */
|
register size (octa). */
|
fprintf (stream, "\tGETA $255,1F\n\t");
|
fprintf (stream, "\tGETA $255,1F\n\t");
|
fprintf (stream, "LDOU %s,$255,0\n\t",
|
fprintf (stream, "LDOU %s,$255,0\n\t",
|
reg_names[MMIX_STATIC_CHAIN_REGNUM]);
|
reg_names[MMIX_STATIC_CHAIN_REGNUM]);
|
fprintf (stream, "LDOU $255,$255,8\n\t");
|
fprintf (stream, "LDOU $255,$255,8\n\t");
|
fprintf (stream, "GO $255,$255,0\n");
|
fprintf (stream, "GO $255,$255,0\n");
|
fprintf (stream, "1H\tOCTA 0\n\t");
|
fprintf (stream, "1H\tOCTA 0\n\t");
|
fprintf (stream, "OCTA 0\n");
|
fprintf (stream, "OCTA 0\n");
|
}
|
}
|
|
|
/* INITIALIZE_TRAMPOLINE. */
|
/* INITIALIZE_TRAMPOLINE. */
|
/* Set the static chain and function pointer field in the trampoline.
|
/* Set the static chain and function pointer field in the trampoline.
|
We also SYNCID here to be sure (doesn't matter in the simulator, but
|
We also SYNCID here to be sure (doesn't matter in the simulator, but
|
some day it will). */
|
some day it will). */
|
|
|
void
|
void
|
mmix_initialize_trampoline (rtx trampaddr, rtx fnaddr, rtx static_chain)
|
mmix_initialize_trampoline (rtx trampaddr, rtx fnaddr, rtx static_chain)
|
{
|
{
|
emit_move_insn (gen_rtx_MEM (DImode, plus_constant (trampaddr, 16)),
|
emit_move_insn (gen_rtx_MEM (DImode, plus_constant (trampaddr, 16)),
|
static_chain);
|
static_chain);
|
emit_move_insn (gen_rtx_MEM (DImode,
|
emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (trampaddr, 24)),
|
plus_constant (trampaddr, 24)),
|
fnaddr);
|
fnaddr);
|
emit_insn (gen_sync_icache (validize_mem (gen_rtx_MEM (DImode,
|
emit_insn (gen_sync_icache (validize_mem (gen_rtx_MEM (DImode,
|
trampaddr)),
|
trampaddr)),
|
GEN_INT (mmix_trampoline_size - 1)));
|
GEN_INT (mmix_trampoline_size - 1)));
|
}
|
}
|
|
|
/* We must exclude constant addresses that have an increment that is not a
|
/* We must exclude constant addresses that have an increment that is not a
|
multiple of four bytes because of restrictions of the GETA
|
multiple of four bytes because of restrictions of the GETA
|
instruction, unless TARGET_BASE_ADDRESSES. */
|
instruction, unless TARGET_BASE_ADDRESSES. */
|
|
|
int
|
int
|
mmix_constant_address_p (rtx x)
|
mmix_constant_address_p (rtx x)
|
{
|
{
|
RTX_CODE code = GET_CODE (x);
|
RTX_CODE code = GET_CODE (x);
|
int addend = 0;
|
int addend = 0;
|
/* When using "base addresses", anything constant goes. */
|
/* When using "base addresses", anything constant goes. */
|
int constant_ok = TARGET_BASE_ADDRESSES != 0;
|
int constant_ok = TARGET_BASE_ADDRESSES != 0;
|
|
|
switch (code)
|
switch (code)
|
{
|
{
|
case LABEL_REF:
|
case LABEL_REF:
|
case SYMBOL_REF:
|
case SYMBOL_REF:
|
return 1;
|
return 1;
|
|
|
case HIGH:
|
case HIGH:
|
/* FIXME: Don't know how to dissect these. Avoid them for now,
|
/* FIXME: Don't know how to dissect these. Avoid them for now,
|
except we know they're constants. */
|
except we know they're constants. */
|
return constant_ok;
|
return constant_ok;
|
|
|
case CONST_INT:
|
case CONST_INT:
|
addend = INTVAL (x);
|
addend = INTVAL (x);
|
break;
|
break;
|
|
|
case CONST_DOUBLE:
|
case CONST_DOUBLE:
|
if (GET_MODE (x) != VOIDmode)
|
if (GET_MODE (x) != VOIDmode)
|
/* Strange that we got here. FIXME: Check if we do. */
|
/* Strange that we got here. FIXME: Check if we do. */
|
return constant_ok;
|
return constant_ok;
|
addend = CONST_DOUBLE_LOW (x);
|
addend = CONST_DOUBLE_LOW (x);
|
break;
|
break;
|
|
|
case CONST:
|
case CONST:
|
/* Note that expressions with arithmetic on forward references don't
|
/* Note that expressions with arithmetic on forward references don't
|
work in mmixal. People using gcc assembly code with mmixal might
|
work in mmixal. People using gcc assembly code with mmixal might
|
need to move arrays and such to before the point of use. */
|
need to move arrays and such to before the point of use. */
|
if (GET_CODE (XEXP (x, 0)) == PLUS)
|
if (GET_CODE (XEXP (x, 0)) == PLUS)
|
{
|
{
|
rtx x0 = XEXP (XEXP (x, 0), 0);
|
rtx x0 = XEXP (XEXP (x, 0), 0);
|
rtx x1 = XEXP (XEXP (x, 0), 1);
|
rtx x1 = XEXP (XEXP (x, 0), 1);
|
|
|
if ((GET_CODE (x0) == SYMBOL_REF
|
if ((GET_CODE (x0) == SYMBOL_REF
|
|| GET_CODE (x0) == LABEL_REF)
|
|| GET_CODE (x0) == LABEL_REF)
|
&& (GET_CODE (x1) == CONST_INT
|
&& (GET_CODE (x1) == CONST_INT
|
|| (GET_CODE (x1) == CONST_DOUBLE
|
|| (GET_CODE (x1) == CONST_DOUBLE
|
&& GET_MODE (x1) == VOIDmode)))
|
&& GET_MODE (x1) == VOIDmode)))
|
addend = mmix_intval (x1);
|
addend = mmix_intval (x1);
|
else
|
else
|
return constant_ok;
|
return constant_ok;
|
}
|
}
|
else
|
else
|
return constant_ok;
|
return constant_ok;
|
break;
|
break;
|
|
|
default:
|
default:
|
return 0;
|
return 0;
|
}
|
}
|
|
|
return constant_ok || (addend & 3) == 0;
|
return constant_ok || (addend & 3) == 0;
|
}
|
}
|
|
|
/* Return 1 if the address is OK, otherwise 0.
|
/* Return 1 if the address is OK, otherwise 0.
|
Used by GO_IF_LEGITIMATE_ADDRESS. */
|
Used by GO_IF_LEGITIMATE_ADDRESS. */
|
|
|
int
|
int
|
mmix_legitimate_address (enum machine_mode mode ATTRIBUTE_UNUSED,
|
mmix_legitimate_address (enum machine_mode mode ATTRIBUTE_UNUSED,
|
rtx x,
|
rtx x,
|
int strict_checking)
|
int strict_checking)
|
{
|
{
|
#define MMIX_REG_OK(X) \
|
#define MMIX_REG_OK(X) \
|
((strict_checking \
|
((strict_checking \
|
&& (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
|
&& (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
|
|| (reg_renumber[REGNO (X)] > 0 \
|
|| (reg_renumber[REGNO (X)] > 0 \
|
&& reg_renumber[REGNO (X)] <= MMIX_LAST_GENERAL_REGISTER))) \
|
&& reg_renumber[REGNO (X)] <= MMIX_LAST_GENERAL_REGISTER))) \
|
|| (!strict_checking \
|
|| (!strict_checking \
|
&& (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
|
&& (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \
|
|| REGNO (X) >= FIRST_PSEUDO_REGISTER \
|
|| REGNO (X) >= FIRST_PSEUDO_REGISTER \
|
|| REGNO (X) == ARG_POINTER_REGNUM)))
|
|| REGNO (X) == ARG_POINTER_REGNUM)))
|
|
|
/* We only accept:
|
/* We only accept:
|
(mem reg)
|
(mem reg)
|
(mem (plus reg reg))
|
(mem (plus reg reg))
|
(mem (plus reg 0..255)).
|
(mem (plus reg 0..255)).
|
unless TARGET_BASE_ADDRESSES, in which case we accept all
|
unless TARGET_BASE_ADDRESSES, in which case we accept all
|
(mem constant_address) too. */
|
(mem constant_address) too. */
|
|
|
|
|
/* (mem reg) */
|
/* (mem reg) */
|
if (REG_P (x) && MMIX_REG_OK (x))
|
if (REG_P (x) && MMIX_REG_OK (x))
|
return 1;
|
return 1;
|
|
|
if (GET_CODE(x) == PLUS)
|
if (GET_CODE(x) == PLUS)
|
{
|
{
|
rtx x1 = XEXP (x, 0);
|
rtx x1 = XEXP (x, 0);
|
rtx x2 = XEXP (x, 1);
|
rtx x2 = XEXP (x, 1);
|
|
|
/* Try swapping the order. FIXME: Do we need this? */
|
/* Try swapping the order. FIXME: Do we need this? */
|
if (! REG_P (x1))
|
if (! REG_P (x1))
|
{
|
{
|
rtx tem = x1;
|
rtx tem = x1;
|
x1 = x2;
|
x1 = x2;
|
x2 = tem;
|
x2 = tem;
|
}
|
}
|
|
|
/* (mem (plus (reg?) (?))) */
|
/* (mem (plus (reg?) (?))) */
|
if (!REG_P (x1) || !MMIX_REG_OK (x1))
|
if (!REG_P (x1) || !MMIX_REG_OK (x1))
|
return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x);
|
return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x);
|
|
|
/* (mem (plus (reg) (reg?))) */
|
/* (mem (plus (reg) (reg?))) */
|
if (REG_P (x2) && MMIX_REG_OK (x2))
|
if (REG_P (x2) && MMIX_REG_OK (x2))
|
return 1;
|
return 1;
|
|
|
/* (mem (plus (reg) (0..255?))) */
|
/* (mem (plus (reg) (0..255?))) */
|
if (GET_CODE (x2) == CONST_INT
|
if (GET_CODE (x2) == CONST_INT
|
&& CONST_OK_FOR_LETTER_P (INTVAL (x2), 'I'))
|
&& CONST_OK_FOR_LETTER_P (INTVAL (x2), 'I'))
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x);
|
return TARGET_BASE_ADDRESSES && mmix_constant_address_p (x);
|
}
|
}
|
|
|
/* LEGITIMATE_CONSTANT_P. */
|
/* LEGITIMATE_CONSTANT_P. */
|
|
|
int
|
int
|
mmix_legitimate_constant_p (rtx x)
|
mmix_legitimate_constant_p (rtx x)
|
{
|
{
|
RTX_CODE code = GET_CODE (x);
|
RTX_CODE code = GET_CODE (x);
|
|
|
/* We must allow any number due to the way the cse passes works; if we
|
/* We must allow any number due to the way the cse passes works; if we
|
do not allow any number here, general_operand will fail, and insns
|
do not allow any number here, general_operand will fail, and insns
|
will fatally fail recognition instead of "softly". */
|
will fatally fail recognition instead of "softly". */
|
if (code == CONST_INT || code == CONST_DOUBLE)
|
if (code == CONST_INT || code == CONST_DOUBLE)
|
return 1;
|
return 1;
|
|
|
return CONSTANT_ADDRESS_P (x);
|
return CONSTANT_ADDRESS_P (x);
|
}
|
}
|
|
|
/* SELECT_CC_MODE. */
|
/* SELECT_CC_MODE. */
|
|
|
enum machine_mode
|
enum machine_mode
|
mmix_select_cc_mode (RTX_CODE op, rtx x, rtx y ATTRIBUTE_UNUSED)
|
mmix_select_cc_mode (RTX_CODE op, rtx x, rtx y ATTRIBUTE_UNUSED)
|
{
|
{
|
/* We use CCmode, CC_UNSmode, CC_FPmode, CC_FPEQmode and CC_FUNmode to
|
/* We use CCmode, CC_UNSmode, CC_FPmode, CC_FPEQmode and CC_FUNmode to
|
output different compare insns. Note that we do not check the
|
output different compare insns. Note that we do not check the
|
validity of the comparison here. */
|
validity of the comparison here. */
|
|
|
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
|
if (GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT)
|
{
|
{
|
if (op == ORDERED || op == UNORDERED || op == UNGE
|
if (op == ORDERED || op == UNORDERED || op == UNGE
|
|| op == UNGT || op == UNLE || op == UNLT)
|
|| op == UNGT || op == UNLE || op == UNLT)
|
return CC_FUNmode;
|
return CC_FUNmode;
|
|
|
if (op == EQ || op == NE)
|
if (op == EQ || op == NE)
|
return CC_FPEQmode;
|
return CC_FPEQmode;
|
|
|
return CC_FPmode;
|
return CC_FPmode;
|
}
|
}
|
|
|
if (op == GTU || op == LTU || op == GEU || op == LEU)
|
if (op == GTU || op == LTU || op == GEU || op == LEU)
|
return CC_UNSmode;
|
return CC_UNSmode;
|
|
|
return CCmode;
|
return CCmode;
|
}
|
}
|
|
|
/* REVERSIBLE_CC_MODE. */
|
/* REVERSIBLE_CC_MODE. */
|
|
|
int
|
int
|
mmix_reversible_cc_mode (enum machine_mode mode)
|
mmix_reversible_cc_mode (enum machine_mode mode)
|
{
|
{
|
/* That is, all integer and the EQ, NE, ORDERED and UNORDERED float
|
/* That is, all integer and the EQ, NE, ORDERED and UNORDERED float
|
compares. */
|
compares. */
|
return mode != CC_FPmode;
|
return mode != CC_FPmode;
|
}
|
}
|
|
|
/* TARGET_RTX_COSTS. */
|
/* TARGET_RTX_COSTS. */
|
|
|
static bool
|
static bool
|
mmix_rtx_costs (rtx x ATTRIBUTE_UNUSED,
|
mmix_rtx_costs (rtx x ATTRIBUTE_UNUSED,
|
int code ATTRIBUTE_UNUSED,
|
int code ATTRIBUTE_UNUSED,
|
int outer_code ATTRIBUTE_UNUSED,
|
int outer_code ATTRIBUTE_UNUSED,
|
int *total ATTRIBUTE_UNUSED)
|
int *total ATTRIBUTE_UNUSED)
|
{
|
{
|
/* For the time being, this is just a stub and we'll accept the
|
/* For the time being, this is just a stub and we'll accept the
|
generic calculations, until we can do measurements, at least.
|
generic calculations, until we can do measurements, at least.
|
Say we did not modify any calculated costs. */
|
Say we did not modify any calculated costs. */
|
return false;
|
return false;
|
}
|
}
|
|
|
/* REGISTER_MOVE_COST. */
|
/* REGISTER_MOVE_COST. */
|
|
|
int
|
int
|
mmix_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
|
mmix_register_move_cost (enum machine_mode mode ATTRIBUTE_UNUSED,
|
enum reg_class from,
|
enum reg_class from,
|
enum reg_class to)
|
enum reg_class to)
|
{
|
{
|
return (from == GENERAL_REGS && from == to) ? 2 : 3;
|
return (from == GENERAL_REGS && from == to) ? 2 : 3;
|
}
|
}
|
|
|
/* Note that we don't have a TEXT_SECTION_ASM_OP, because it has to be a
|
/* Note that we don't have a TEXT_SECTION_ASM_OP, because it has to be a
|
compile-time constant; it's used in an asm in crtstuff.c, compiled for
|
compile-time constant; it's used in an asm in crtstuff.c, compiled for
|
the target. */
|
the target. */
|
|
|
/* DATA_SECTION_ASM_OP. */
|
/* DATA_SECTION_ASM_OP. */
|
|
|
const char *
|
const char *
|
mmix_data_section_asm_op (void)
|
mmix_data_section_asm_op (void)
|
{
|
{
|
return "\t.data ! mmixal:= 8H LOC 9B";
|
return "\t.data ! mmixal:= 8H LOC 9B";
|
}
|
}
|
|
|
static void
|
static void
|
mmix_encode_section_info (tree decl, rtx rtl, int first)
|
mmix_encode_section_info (tree decl, rtx rtl, int first)
|
{
|
{
|
/* Test for an external declaration, and do nothing if it is one. */
|
/* Test for an external declaration, and do nothing if it is one. */
|
if ((TREE_CODE (decl) == VAR_DECL
|
if ((TREE_CODE (decl) == VAR_DECL
|
&& (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl)))
|
&& (DECL_EXTERNAL (decl) || TREE_PUBLIC (decl)))
|
|| (TREE_CODE (decl) == FUNCTION_DECL && TREE_PUBLIC (decl)))
|
|| (TREE_CODE (decl) == FUNCTION_DECL && TREE_PUBLIC (decl)))
|
;
|
;
|
else if (first && DECL_P (decl))
|
else if (first && DECL_P (decl))
|
{
|
{
|
/* For non-visible declarations, add a "@" prefix, which we skip
|
/* For non-visible declarations, add a "@" prefix, which we skip
|
when the label is output. If the label does not have this
|
when the label is output. If the label does not have this
|
prefix, a ":" is output if -mtoplevel-symbols.
|
prefix, a ":" is output if -mtoplevel-symbols.
|
|
|
Note that this does not work for data that is declared extern and
|
Note that this does not work for data that is declared extern and
|
later defined as static. If there's code in between, that code
|
later defined as static. If there's code in between, that code
|
will refer to the extern declaration, and vice versa. This just
|
will refer to the extern declaration, and vice versa. This just
|
means that when -mtoplevel-symbols is in use, we can just handle
|
means that when -mtoplevel-symbols is in use, we can just handle
|
well-behaved ISO-compliant code. */
|
well-behaved ISO-compliant code. */
|
|
|
const char *str = XSTR (XEXP (rtl, 0), 0);
|
const char *str = XSTR (XEXP (rtl, 0), 0);
|
int len = strlen (str);
|
int len = strlen (str);
|
char *newstr;
|
char *newstr;
|
|
|
/* Why is the return type of ggc_alloc_string const? */
|
/* Why is the return type of ggc_alloc_string const? */
|
newstr = (char *) ggc_alloc_string ("", len + 1);
|
newstr = (char *) ggc_alloc_string ("", len + 1);
|
|
|
strcpy (newstr + 1, str);
|
strcpy (newstr + 1, str);
|
*newstr = '@';
|
*newstr = '@';
|
XSTR (XEXP (rtl, 0), 0) = newstr;
|
XSTR (XEXP (rtl, 0), 0) = newstr;
|
}
|
}
|
|
|
/* Set SYMBOL_REF_FLAG for things that we want to access with GETA. We
|
/* Set SYMBOL_REF_FLAG for things that we want to access with GETA. We
|
may need different options to reach for different things with GETA.
|
may need different options to reach for different things with GETA.
|
For now, functions and things we know or have been told are constant. */
|
For now, functions and things we know or have been told are constant. */
|
if (TREE_CODE (decl) == FUNCTION_DECL
|
if (TREE_CODE (decl) == FUNCTION_DECL
|
|| TREE_CONSTANT (decl)
|
|| TREE_CONSTANT (decl)
|
|| (TREE_CODE (decl) == VAR_DECL
|
|| (TREE_CODE (decl) == VAR_DECL
|
&& TREE_READONLY (decl)
|
&& TREE_READONLY (decl)
|
&& !TREE_SIDE_EFFECTS (decl)
|
&& !TREE_SIDE_EFFECTS (decl)
|
&& (!DECL_INITIAL (decl)
|
&& (!DECL_INITIAL (decl)
|
|| TREE_CONSTANT (DECL_INITIAL (decl)))))
|
|| TREE_CONSTANT (DECL_INITIAL (decl)))))
|
SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;
|
SYMBOL_REF_FLAG (XEXP (rtl, 0)) = 1;
|
}
|
}
|
|
|
static const char *
|
static const char *
|
mmix_strip_name_encoding (const char *name)
|
mmix_strip_name_encoding (const char *name)
|
{
|
{
|
for (; (*name == '@' || *name == '*'); name++)
|
for (; (*name == '@' || *name == '*'); name++)
|
;
|
;
|
|
|
return name;
|
return name;
|
}
|
}
|
|
|
/* TARGET_ASM_FILE_START.
|
/* TARGET_ASM_FILE_START.
|
We just emit a little comment for the time being. */
|
We just emit a little comment for the time being. */
|
|
|
static void
|
static void
|
mmix_file_start (void)
|
mmix_file_start (void)
|
{
|
{
|
default_file_start ();
|
default_file_start ();
|
|
|
fputs ("! mmixal:= 8H LOC Data_Section\n", asm_out_file);
|
fputs ("! mmixal:= 8H LOC Data_Section\n", asm_out_file);
|
|
|
/* Make sure each file starts with the text section. */
|
/* Make sure each file starts with the text section. */
|
switch_to_section (text_section);
|
switch_to_section (text_section);
|
}
|
}
|
|
|
/* TARGET_ASM_FILE_END. */
|
/* TARGET_ASM_FILE_END. */
|
|
|
static void
|
static void
|
mmix_file_end (void)
|
mmix_file_end (void)
|
{
|
{
|
/* Make sure each file ends with the data section. */
|
/* Make sure each file ends with the data section. */
|
switch_to_section (data_section);
|
switch_to_section (data_section);
|
}
|
}
|
|
|
/* ASM_OUTPUT_SOURCE_FILENAME. */
|
/* ASM_OUTPUT_SOURCE_FILENAME. */
|
|
|
void
|
void
|
mmix_asm_output_source_filename (FILE *stream, const char *name)
|
mmix_asm_output_source_filename (FILE *stream, const char *name)
|
{
|
{
|
fprintf (stream, "# 1 ");
|
fprintf (stream, "# 1 ");
|
OUTPUT_QUOTED_STRING (stream, name);
|
OUTPUT_QUOTED_STRING (stream, name);
|
fprintf (stream, "\n");
|
fprintf (stream, "\n");
|
}
|
}
|
|
|
/* OUTPUT_QUOTED_STRING. */
|
/* OUTPUT_QUOTED_STRING. */
|
|
|
void
|
void
|
mmix_output_quoted_string (FILE *stream, const char *string, int length)
|
mmix_output_quoted_string (FILE *stream, const char *string, int length)
|
{
|
{
|
const char * string_end = string + length;
|
const char * string_end = string + length;
|
static const char *const unwanted_chars = "\"[]\\";
|
static const char *const unwanted_chars = "\"[]\\";
|
|
|
/* Output "any character except newline and double quote character". We
|
/* Output "any character except newline and double quote character". We
|
play it safe and avoid all control characters too. We also do not
|
play it safe and avoid all control characters too. We also do not
|
want [] as characters, should input be passed through m4 with [] as
|
want [] as characters, should input be passed through m4 with [] as
|
quotes. Further, we avoid "\", because the GAS port handles it as a
|
quotes. Further, we avoid "\", because the GAS port handles it as a
|
quoting character. */
|
quoting character. */
|
while (string < string_end)
|
while (string < string_end)
|
{
|
{
|
if (*string
|
if (*string
|
&& (unsigned char) *string < 128
|
&& (unsigned char) *string < 128
|
&& !ISCNTRL (*string)
|
&& !ISCNTRL (*string)
|
&& strchr (unwanted_chars, *string) == NULL)
|
&& strchr (unwanted_chars, *string) == NULL)
|
{
|
{
|
fputc ('"', stream);
|
fputc ('"', stream);
|
while (*string
|
while (*string
|
&& (unsigned char) *string < 128
|
&& (unsigned char) *string < 128
|
&& !ISCNTRL (*string)
|
&& !ISCNTRL (*string)
|
&& strchr (unwanted_chars, *string) == NULL
|
&& strchr (unwanted_chars, *string) == NULL
|
&& string < string_end)
|
&& string < string_end)
|
{
|
{
|
fputc (*string, stream);
|
fputc (*string, stream);
|
string++;
|
string++;
|
}
|
}
|
fputc ('"', stream);
|
fputc ('"', stream);
|
if (string < string_end)
|
if (string < string_end)
|
fprintf (stream, ",");
|
fprintf (stream, ",");
|
}
|
}
|
if (string < string_end)
|
if (string < string_end)
|
{
|
{
|
fprintf (stream, "#%x", *string & 255);
|
fprintf (stream, "#%x", *string & 255);
|
string++;
|
string++;
|
if (string < string_end)
|
if (string < string_end)
|
fprintf (stream, ",");
|
fprintf (stream, ",");
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* Target hook for assembling integer objects. Use mmix_print_operand
|
/* Target hook for assembling integer objects. Use mmix_print_operand
|
for WYDE and TETRA. Use mmix_output_octa to output 8-byte
|
for WYDE and TETRA. Use mmix_output_octa to output 8-byte
|
CONST_DOUBLEs. */
|
CONST_DOUBLEs. */
|
|
|
static bool
|
static bool
|
mmix_assemble_integer (rtx x, unsigned int size, int aligned_p)
|
mmix_assemble_integer (rtx x, unsigned int size, int aligned_p)
|
{
|
{
|
if (aligned_p)
|
if (aligned_p)
|
switch (size)
|
switch (size)
|
{
|
{
|
/* We handle a limited number of types of operands in here. But
|
/* We handle a limited number of types of operands in here. But
|
that's ok, because we can punt to generic functions. We then
|
that's ok, because we can punt to generic functions. We then
|
pretend that aligned data isn't needed, so the usual .<pseudo>
|
pretend that aligned data isn't needed, so the usual .<pseudo>
|
syntax is used (which works for aligned data too). We actually
|
syntax is used (which works for aligned data too). We actually
|
*must* do that, since we say we don't have simple aligned
|
*must* do that, since we say we don't have simple aligned
|
pseudos, causing this function to be called. We just try and
|
pseudos, causing this function to be called. We just try and
|
keep as much compatibility as possible with mmixal syntax for
|
keep as much compatibility as possible with mmixal syntax for
|
normal cases (i.e. without GNU extensions and C only). */
|
normal cases (i.e. without GNU extensions and C only). */
|
case 1:
|
case 1:
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
{
|
{
|
aligned_p = 0;
|
aligned_p = 0;
|
break;
|
break;
|
}
|
}
|
fputs ("\tBYTE\t", asm_out_file);
|
fputs ("\tBYTE\t", asm_out_file);
|
mmix_print_operand (asm_out_file, x, 'B');
|
mmix_print_operand (asm_out_file, x, 'B');
|
fputc ('\n', asm_out_file);
|
fputc ('\n', asm_out_file);
|
return true;
|
return true;
|
|
|
case 2:
|
case 2:
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
{
|
{
|
aligned_p = 0;
|
aligned_p = 0;
|
break;
|
break;
|
}
|
}
|
fputs ("\tWYDE\t", asm_out_file);
|
fputs ("\tWYDE\t", asm_out_file);
|
mmix_print_operand (asm_out_file, x, 'W');
|
mmix_print_operand (asm_out_file, x, 'W');
|
fputc ('\n', asm_out_file);
|
fputc ('\n', asm_out_file);
|
return true;
|
return true;
|
|
|
case 4:
|
case 4:
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
{
|
{
|
aligned_p = 0;
|
aligned_p = 0;
|
break;
|
break;
|
}
|
}
|
fputs ("\tTETRA\t", asm_out_file);
|
fputs ("\tTETRA\t", asm_out_file);
|
mmix_print_operand (asm_out_file, x, 'L');
|
mmix_print_operand (asm_out_file, x, 'L');
|
fputc ('\n', asm_out_file);
|
fputc ('\n', asm_out_file);
|
return true;
|
return true;
|
|
|
case 8:
|
case 8:
|
/* We don't get here anymore for CONST_DOUBLE, because DImode
|
/* We don't get here anymore for CONST_DOUBLE, because DImode
|
isn't expressed as CONST_DOUBLE, and DFmode is handled
|
isn't expressed as CONST_DOUBLE, and DFmode is handled
|
elsewhere. */
|
elsewhere. */
|
gcc_assert (GET_CODE (x) != CONST_DOUBLE);
|
gcc_assert (GET_CODE (x) != CONST_DOUBLE);
|
assemble_integer_with_op ("\tOCTA\t", x);
|
assemble_integer_with_op ("\tOCTA\t", x);
|
return true;
|
return true;
|
}
|
}
|
return default_assemble_integer (x, size, aligned_p);
|
return default_assemble_integer (x, size, aligned_p);
|
}
|
}
|
|
|
/* ASM_OUTPUT_ASCII. */
|
/* ASM_OUTPUT_ASCII. */
|
|
|
void
|
void
|
mmix_asm_output_ascii (FILE *stream, const char *string, int length)
|
mmix_asm_output_ascii (FILE *stream, const char *string, int length)
|
{
|
{
|
while (length > 0)
|
while (length > 0)
|
{
|
{
|
int chunk_size = length > 60 ? 60 : length;
|
int chunk_size = length > 60 ? 60 : length;
|
fprintf (stream, "\tBYTE ");
|
fprintf (stream, "\tBYTE ");
|
mmix_output_quoted_string (stream, string, chunk_size);
|
mmix_output_quoted_string (stream, string, chunk_size);
|
string += chunk_size;
|
string += chunk_size;
|
length -= chunk_size;
|
length -= chunk_size;
|
fprintf (stream, "\n");
|
fprintf (stream, "\n");
|
}
|
}
|
}
|
}
|
|
|
/* ASM_OUTPUT_ALIGNED_COMMON. */
|
/* ASM_OUTPUT_ALIGNED_COMMON. */
|
|
|
void
|
void
|
mmix_asm_output_aligned_common (FILE *stream,
|
mmix_asm_output_aligned_common (FILE *stream,
|
const char *name,
|
const char *name,
|
int size,
|
int size,
|
int align)
|
int align)
|
{
|
{
|
/* This is mostly the elfos.h one. There doesn't seem to be a way to
|
/* This is mostly the elfos.h one. There doesn't seem to be a way to
|
express this in a mmixal-compatible way. */
|
express this in a mmixal-compatible way. */
|
fprintf (stream, "\t.comm\t");
|
fprintf (stream, "\t.comm\t");
|
assemble_name (stream, name);
|
assemble_name (stream, name);
|
fprintf (stream, ",%u,%u ! mmixal-incompatible COMMON\n",
|
fprintf (stream, ",%u,%u ! mmixal-incompatible COMMON\n",
|
size, align / BITS_PER_UNIT);
|
size, align / BITS_PER_UNIT);
|
}
|
}
|
|
|
/* ASM_OUTPUT_ALIGNED_LOCAL. */
|
/* ASM_OUTPUT_ALIGNED_LOCAL. */
|
|
|
void
|
void
|
mmix_asm_output_aligned_local (FILE *stream,
|
mmix_asm_output_aligned_local (FILE *stream,
|
const char *name,
|
const char *name,
|
int size,
|
int size,
|
int align)
|
int align)
|
{
|
{
|
switch_to_section (data_section);
|
switch_to_section (data_section);
|
|
|
ASM_OUTPUT_ALIGN (stream, exact_log2 (align/BITS_PER_UNIT));
|
ASM_OUTPUT_ALIGN (stream, exact_log2 (align/BITS_PER_UNIT));
|
assemble_name (stream, name);
|
assemble_name (stream, name);
|
fprintf (stream, "\tLOC @+%d\n", size);
|
fprintf (stream, "\tLOC @+%d\n", size);
|
}
|
}
|
|
|
/* ASM_OUTPUT_LABEL. */
|
/* ASM_OUTPUT_LABEL. */
|
|
|
void
|
void
|
mmix_asm_output_label (FILE *stream, const char *name)
|
mmix_asm_output_label (FILE *stream, const char *name)
|
{
|
{
|
assemble_name (stream, name);
|
assemble_name (stream, name);
|
fprintf (stream, "\tIS @\n");
|
fprintf (stream, "\tIS @\n");
|
}
|
}
|
|
|
/* ASM_OUTPUT_INTERNAL_LABEL. */
|
/* ASM_OUTPUT_INTERNAL_LABEL. */
|
|
|
void
|
void
|
mmix_asm_output_internal_label (FILE *stream, const char *name)
|
mmix_asm_output_internal_label (FILE *stream, const char *name)
|
{
|
{
|
assemble_name_raw (stream, name);
|
assemble_name_raw (stream, name);
|
fprintf (stream, "\tIS @\n");
|
fprintf (stream, "\tIS @\n");
|
}
|
}
|
|
|
/* ASM_DECLARE_REGISTER_GLOBAL. */
|
/* ASM_DECLARE_REGISTER_GLOBAL. */
|
|
|
void
|
void
|
mmix_asm_declare_register_global (FILE *stream ATTRIBUTE_UNUSED,
|
mmix_asm_declare_register_global (FILE *stream ATTRIBUTE_UNUSED,
|
tree decl ATTRIBUTE_UNUSED,
|
tree decl ATTRIBUTE_UNUSED,
|
int regno ATTRIBUTE_UNUSED,
|
int regno ATTRIBUTE_UNUSED,
|
const char *name ATTRIBUTE_UNUSED)
|
const char *name ATTRIBUTE_UNUSED)
|
{
|
{
|
/* Nothing to do here, but there *will* be, therefore the framework is
|
/* Nothing to do here, but there *will* be, therefore the framework is
|
here. */
|
here. */
|
}
|
}
|
|
|
/* ASM_WEAKEN_LABEL. */
|
/* ASM_WEAKEN_LABEL. */
|
|
|
void
|
void
|
mmix_asm_weaken_label (FILE *stream ATTRIBUTE_UNUSED,
|
mmix_asm_weaken_label (FILE *stream ATTRIBUTE_UNUSED,
|
const char *name ATTRIBUTE_UNUSED)
|
const char *name ATTRIBUTE_UNUSED)
|
{
|
{
|
fprintf (stream, "\t.weak ");
|
fprintf (stream, "\t.weak ");
|
assemble_name (stream, name);
|
assemble_name (stream, name);
|
fprintf (stream, " ! mmixal-incompatible\n");
|
fprintf (stream, " ! mmixal-incompatible\n");
|
}
|
}
|
|
|
/* MAKE_DECL_ONE_ONLY. */
|
/* MAKE_DECL_ONE_ONLY. */
|
|
|
void
|
void
|
mmix_make_decl_one_only (tree decl)
|
mmix_make_decl_one_only (tree decl)
|
{
|
{
|
DECL_WEAK (decl) = 1;
|
DECL_WEAK (decl) = 1;
|
}
|
}
|
|
|
/* ASM_OUTPUT_LABELREF.
|
/* ASM_OUTPUT_LABELREF.
|
Strip GCC's '*' and our own '@'. No order is assumed. */
|
Strip GCC's '*' and our own '@'. No order is assumed. */
|
|
|
void
|
void
|
mmix_asm_output_labelref (FILE *stream, const char *name)
|
mmix_asm_output_labelref (FILE *stream, const char *name)
|
{
|
{
|
int is_extern = 1;
|
int is_extern = 1;
|
|
|
for (; (*name == '@' || *name == '*'); name++)
|
for (; (*name == '@' || *name == '*'); name++)
|
if (*name == '@')
|
if (*name == '@')
|
is_extern = 0;
|
is_extern = 0;
|
|
|
asm_fprintf (stream, "%s%U%s",
|
asm_fprintf (stream, "%s%U%s",
|
is_extern && TARGET_TOPLEVEL_SYMBOLS ? ":" : "",
|
is_extern && TARGET_TOPLEVEL_SYMBOLS ? ":" : "",
|
name);
|
name);
|
}
|
}
|
|
|
/* ASM_OUTPUT_DEF. */
|
/* ASM_OUTPUT_DEF. */
|
|
|
void
|
void
|
mmix_asm_output_def (FILE *stream, const char *name, const char *value)
|
mmix_asm_output_def (FILE *stream, const char *name, const char *value)
|
{
|
{
|
assemble_name (stream, name);
|
assemble_name (stream, name);
|
fprintf (stream, "\tIS ");
|
fprintf (stream, "\tIS ");
|
assemble_name (stream, value);
|
assemble_name (stream, value);
|
fputc ('\n', stream);
|
fputc ('\n', stream);
|
}
|
}
|
|
|
/* PRINT_OPERAND. */
|
/* PRINT_OPERAND. */
|
|
|
void
|
void
|
mmix_print_operand (FILE *stream, rtx x, int code)
|
mmix_print_operand (FILE *stream, rtx x, int code)
|
{
|
{
|
/* When we add support for different codes later, we can, when needed,
|
/* When we add support for different codes later, we can, when needed,
|
drop through to the main handler with a modified operand. */
|
drop through to the main handler with a modified operand. */
|
rtx modified_x = x;
|
rtx modified_x = x;
|
int regno = x != NULL_RTX && REG_P (x) ? REGNO (x) : 0;
|
int regno = x != NULL_RTX && REG_P (x) ? REGNO (x) : 0;
|
|
|
switch (code)
|
switch (code)
|
{
|
{
|
/* Unrelated codes are in alphabetic order. */
|
/* Unrelated codes are in alphabetic order. */
|
|
|
case '+':
|
case '+':
|
/* For conditional branches, output "P" for a probable branch. */
|
/* For conditional branches, output "P" for a probable branch. */
|
if (TARGET_BRANCH_PREDICT)
|
if (TARGET_BRANCH_PREDICT)
|
{
|
{
|
x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
|
x = find_reg_note (current_output_insn, REG_BR_PROB, 0);
|
if (x && INTVAL (XEXP (x, 0)) > REG_BR_PROB_BASE / 2)
|
if (x && INTVAL (XEXP (x, 0)) > REG_BR_PROB_BASE / 2)
|
putc ('P', stream);
|
putc ('P', stream);
|
}
|
}
|
return;
|
return;
|
|
|
case '.':
|
case '.':
|
/* For the %d in POP %d,0. */
|
/* For the %d in POP %d,0. */
|
fprintf (stream, "%d", MMIX_POP_ARGUMENT ());
|
fprintf (stream, "%d", MMIX_POP_ARGUMENT ());
|
return;
|
return;
|
|
|
case 'B':
|
case 'B':
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x);
|
fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x);
|
fprintf (stream, "%d", (int) (INTVAL (x) & 0xff));
|
fprintf (stream, "%d", (int) (INTVAL (x) & 0xff));
|
return;
|
return;
|
|
|
case 'H':
|
case 'H':
|
/* Highpart. Must be general register, and not the last one, as
|
/* Highpart. Must be general register, and not the last one, as
|
that one cannot be part of a consecutive register pair. */
|
that one cannot be part of a consecutive register pair. */
|
if (regno > MMIX_LAST_GENERAL_REGISTER - 1)
|
if (regno > MMIX_LAST_GENERAL_REGISTER - 1)
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
|
|
/* This is big-endian, so the high-part is the first one. */
|
/* This is big-endian, so the high-part is the first one. */
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]);
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]);
|
return;
|
return;
|
|
|
case 'L':
|
case 'L':
|
/* Lowpart. Must be CONST_INT or general register, and not the last
|
/* Lowpart. Must be CONST_INT or general register, and not the last
|
one, as that one cannot be part of a consecutive register pair. */
|
one, as that one cannot be part of a consecutive register pair. */
|
if (GET_CODE (x) == CONST_INT)
|
if (GET_CODE (x) == CONST_INT)
|
{
|
{
|
fprintf (stream, "#%lx",
|
fprintf (stream, "#%lx",
|
(unsigned long) (INTVAL (x)
|
(unsigned long) (INTVAL (x)
|
& ((unsigned int) 0x7fffffff * 2 + 1)));
|
& ((unsigned int) 0x7fffffff * 2 + 1)));
|
return;
|
return;
|
}
|
}
|
|
|
if (GET_CODE (x) == SYMBOL_REF)
|
if (GET_CODE (x) == SYMBOL_REF)
|
{
|
{
|
output_addr_const (stream, x);
|
output_addr_const (stream, x);
|
return;
|
return;
|
}
|
}
|
|
|
if (regno > MMIX_LAST_GENERAL_REGISTER - 1)
|
if (regno > MMIX_LAST_GENERAL_REGISTER - 1)
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
|
|
/* This is big-endian, so the low-part is + 1. */
|
/* This is big-endian, so the low-part is + 1. */
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno) + 1]);
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno) + 1]);
|
return;
|
return;
|
|
|
/* Can't use 'a' because that's a generic modifier for address
|
/* Can't use 'a' because that's a generic modifier for address
|
output. */
|
output. */
|
case 'A':
|
case 'A':
|
mmix_output_shiftvalue_op_from_str (stream, "ANDN",
|
mmix_output_shiftvalue_op_from_str (stream, "ANDN",
|
~(unsigned HOST_WIDEST_INT)
|
~(unsigned HOST_WIDEST_INT)
|
mmix_intval (x));
|
mmix_intval (x));
|
return;
|
return;
|
|
|
case 'i':
|
case 'i':
|
mmix_output_shiftvalue_op_from_str (stream, "INC",
|
mmix_output_shiftvalue_op_from_str (stream, "INC",
|
(unsigned HOST_WIDEST_INT)
|
(unsigned HOST_WIDEST_INT)
|
mmix_intval (x));
|
mmix_intval (x));
|
return;
|
return;
|
|
|
case 'o':
|
case 'o':
|
mmix_output_shiftvalue_op_from_str (stream, "OR",
|
mmix_output_shiftvalue_op_from_str (stream, "OR",
|
(unsigned HOST_WIDEST_INT)
|
(unsigned HOST_WIDEST_INT)
|
mmix_intval (x));
|
mmix_intval (x));
|
return;
|
return;
|
|
|
case 's':
|
case 's':
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
(unsigned HOST_WIDEST_INT)
|
(unsigned HOST_WIDEST_INT)
|
mmix_intval (x));
|
mmix_intval (x));
|
return;
|
return;
|
|
|
case 'd':
|
case 'd':
|
case 'D':
|
case 'D':
|
mmix_output_condition (stream, x, (code == 'D'));
|
mmix_output_condition (stream, x, (code == 'D'));
|
return;
|
return;
|
|
|
case 'e':
|
case 'e':
|
/* Output an extra "e" to make fcmpe, fune. */
|
/* Output an extra "e" to make fcmpe, fune. */
|
if (TARGET_FCMP_EPSILON)
|
if (TARGET_FCMP_EPSILON)
|
fprintf (stream, "e");
|
fprintf (stream, "e");
|
return;
|
return;
|
|
|
case 'm':
|
case 'm':
|
/* Output the number minus 1. */
|
/* Output the number minus 1. */
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
{
|
{
|
fatal_insn ("MMIX Internal: Bad value for 'm', not a CONST_INT",
|
fatal_insn ("MMIX Internal: Bad value for 'm', not a CONST_INT",
|
x);
|
x);
|
}
|
}
|
fprintf (stream, HOST_WIDEST_INT_PRINT_DEC,
|
fprintf (stream, HOST_WIDEST_INT_PRINT_DEC,
|
(HOST_WIDEST_INT) (mmix_intval (x) - 1));
|
(HOST_WIDEST_INT) (mmix_intval (x) - 1));
|
return;
|
return;
|
|
|
case 'p':
|
case 'p':
|
/* Store the number of registers we want to save. This was setup
|
/* Store the number of registers we want to save. This was setup
|
by the prologue. The actual operand contains the number of
|
by the prologue. The actual operand contains the number of
|
registers to pass, but we don't use it currently. Anyway, we
|
registers to pass, but we don't use it currently. Anyway, we
|
need to output the number of saved registers here. */
|
need to output the number of saved registers here. */
|
fprintf (stream, "%d",
|
fprintf (stream, "%d",
|
cfun->machine->highest_saved_stack_register + 1);
|
cfun->machine->highest_saved_stack_register + 1);
|
return;
|
return;
|
|
|
case 'r':
|
case 'r':
|
/* Store the register to output a constant to. */
|
/* Store the register to output a constant to. */
|
if (! REG_P (x))
|
if (! REG_P (x))
|
fatal_insn ("MMIX Internal: Expected a register, not this", x);
|
fatal_insn ("MMIX Internal: Expected a register, not this", x);
|
mmix_output_destination_register = MMIX_OUTPUT_REGNO (regno);
|
mmix_output_destination_register = MMIX_OUTPUT_REGNO (regno);
|
return;
|
return;
|
|
|
case 'I':
|
case 'I':
|
/* Output the constant. Note that we use this for floats as well. */
|
/* Output the constant. Note that we use this for floats as well. */
|
if (GET_CODE (x) != CONST_INT
|
if (GET_CODE (x) != CONST_INT
|
&& (GET_CODE (x) != CONST_DOUBLE
|
&& (GET_CODE (x) != CONST_DOUBLE
|
|| (GET_MODE (x) != VOIDmode && GET_MODE (x) != DFmode
|
|| (GET_MODE (x) != VOIDmode && GET_MODE (x) != DFmode
|
&& GET_MODE (x) != SFmode)))
|
&& GET_MODE (x) != SFmode)))
|
fatal_insn ("MMIX Internal: Expected a constant, not this", x);
|
fatal_insn ("MMIX Internal: Expected a constant, not this", x);
|
mmix_output_register_setting (stream,
|
mmix_output_register_setting (stream,
|
mmix_output_destination_register,
|
mmix_output_destination_register,
|
mmix_intval (x), 0);
|
mmix_intval (x), 0);
|
return;
|
return;
|
|
|
case 'U':
|
case 'U':
|
/* An U for unsigned, if TARGET_ZERO_EXTEND. Ignore the operand. */
|
/* An U for unsigned, if TARGET_ZERO_EXTEND. Ignore the operand. */
|
if (TARGET_ZERO_EXTEND)
|
if (TARGET_ZERO_EXTEND)
|
putc ('U', stream);
|
putc ('U', stream);
|
return;
|
return;
|
|
|
case 'v':
|
case 'v':
|
mmix_output_shifted_value (stream, (HOST_WIDEST_INT) mmix_intval (x));
|
mmix_output_shifted_value (stream, (HOST_WIDEST_INT) mmix_intval (x));
|
return;
|
return;
|
|
|
case 'V':
|
case 'V':
|
mmix_output_shifted_value (stream, (HOST_WIDEST_INT) ~mmix_intval (x));
|
mmix_output_shifted_value (stream, (HOST_WIDEST_INT) ~mmix_intval (x));
|
return;
|
return;
|
|
|
case 'W':
|
case 'W':
|
if (GET_CODE (x) != CONST_INT)
|
if (GET_CODE (x) != CONST_INT)
|
fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x);
|
fatal_insn ("MMIX Internal: Expected a CONST_INT, not this", x);
|
fprintf (stream, "#%x", (int) (INTVAL (x) & 0xffff));
|
fprintf (stream, "#%x", (int) (INTVAL (x) & 0xffff));
|
return;
|
return;
|
|
|
case 0:
|
case 0:
|
/* Nothing to do. */
|
/* Nothing to do. */
|
break;
|
break;
|
|
|
default:
|
default:
|
/* Presumably there's a missing case above if we get here. */
|
/* Presumably there's a missing case above if we get here. */
|
internal_error ("MMIX Internal: Missing %qc case in mmix_print_operand", code);
|
internal_error ("MMIX Internal: Missing %qc case in mmix_print_operand", code);
|
}
|
}
|
|
|
switch (GET_CODE (modified_x))
|
switch (GET_CODE (modified_x))
|
{
|
{
|
case REG:
|
case REG:
|
regno = REGNO (modified_x);
|
regno = REGNO (modified_x);
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
internal_error ("MMIX Internal: Bad register: %d", regno);
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]);
|
fprintf (stream, "%s", reg_names[MMIX_OUTPUT_REGNO (regno)]);
|
return;
|
return;
|
|
|
case MEM:
|
case MEM:
|
output_address (XEXP (modified_x, 0));
|
output_address (XEXP (modified_x, 0));
|
return;
|
return;
|
|
|
case CONST_INT:
|
case CONST_INT:
|
/* For -2147483648, mmixal complains that the constant does not fit
|
/* For -2147483648, mmixal complains that the constant does not fit
|
in 4 bytes, so let's output it as hex. Take care to handle hosts
|
in 4 bytes, so let's output it as hex. Take care to handle hosts
|
where HOST_WIDE_INT is longer than an int.
|
where HOST_WIDE_INT is longer than an int.
|
|
|
Print small constants +-255 using decimal. */
|
Print small constants +-255 using decimal. */
|
|
|
if (INTVAL (modified_x) > -256 && INTVAL (modified_x) < 256)
|
if (INTVAL (modified_x) > -256 && INTVAL (modified_x) < 256)
|
fprintf (stream, "%d", (int) (INTVAL (modified_x)));
|
fprintf (stream, "%d", (int) (INTVAL (modified_x)));
|
else
|
else
|
fprintf (stream, "#%x",
|
fprintf (stream, "#%x",
|
(int) (INTVAL (modified_x)) & (unsigned int) ~0);
|
(int) (INTVAL (modified_x)) & (unsigned int) ~0);
|
return;
|
return;
|
|
|
case CONST_DOUBLE:
|
case CONST_DOUBLE:
|
/* Do somewhat as CONST_INT. */
|
/* Do somewhat as CONST_INT. */
|
mmix_output_octa (stream, mmix_intval (modified_x), 0);
|
mmix_output_octa (stream, mmix_intval (modified_x), 0);
|
return;
|
return;
|
|
|
case CONST:
|
case CONST:
|
output_addr_const (stream, modified_x);
|
output_addr_const (stream, modified_x);
|
return;
|
return;
|
|
|
default:
|
default:
|
/* No need to test for all strange things. Let output_addr_const do
|
/* No need to test for all strange things. Let output_addr_const do
|
it for us. */
|
it for us. */
|
if (CONSTANT_P (modified_x)
|
if (CONSTANT_P (modified_x)
|
/* Strangely enough, this is not included in CONSTANT_P.
|
/* Strangely enough, this is not included in CONSTANT_P.
|
FIXME: Ask/check about sanity here. */
|
FIXME: Ask/check about sanity here. */
|
|| GET_CODE (modified_x) == CODE_LABEL)
|
|| GET_CODE (modified_x) == CODE_LABEL)
|
{
|
{
|
output_addr_const (stream, modified_x);
|
output_addr_const (stream, modified_x);
|
return;
|
return;
|
}
|
}
|
|
|
/* We need the original here. */
|
/* We need the original here. */
|
fatal_insn ("MMIX Internal: Cannot decode this operand", x);
|
fatal_insn ("MMIX Internal: Cannot decode this operand", x);
|
}
|
}
|
}
|
}
|
|
|
/* PRINT_OPERAND_PUNCT_VALID_P. */
|
/* PRINT_OPERAND_PUNCT_VALID_P. */
|
|
|
int
|
int
|
mmix_print_operand_punct_valid_p (int code ATTRIBUTE_UNUSED)
|
mmix_print_operand_punct_valid_p (int code ATTRIBUTE_UNUSED)
|
{
|
{
|
/* A '+' is used for branch prediction, similar to other ports. */
|
/* A '+' is used for branch prediction, similar to other ports. */
|
return code == '+'
|
return code == '+'
|
/* A '.' is used for the %d in the POP %d,0 return insn. */
|
/* A '.' is used for the %d in the POP %d,0 return insn. */
|
|| code == '.';
|
|| code == '.';
|
}
|
}
|
|
|
/* PRINT_OPERAND_ADDRESS. */
|
/* PRINT_OPERAND_ADDRESS. */
|
|
|
void
|
void
|
mmix_print_operand_address (FILE *stream, rtx x)
|
mmix_print_operand_address (FILE *stream, rtx x)
|
{
|
{
|
if (REG_P (x))
|
if (REG_P (x))
|
{
|
{
|
/* I find the generated assembly code harder to read without
|
/* I find the generated assembly code harder to read without
|
the ",0". */
|
the ",0". */
|
fprintf (stream, "%s,0", reg_names[MMIX_OUTPUT_REGNO (REGNO (x))]);
|
fprintf (stream, "%s,0", reg_names[MMIX_OUTPUT_REGNO (REGNO (x))]);
|
return;
|
return;
|
}
|
}
|
else if (GET_CODE (x) == PLUS)
|
else if (GET_CODE (x) == PLUS)
|
{
|
{
|
rtx x1 = XEXP (x, 0);
|
rtx x1 = XEXP (x, 0);
|
rtx x2 = XEXP (x, 1);
|
rtx x2 = XEXP (x, 1);
|
|
|
if (REG_P (x1))
|
if (REG_P (x1))
|
{
|
{
|
fprintf (stream, "%s,", reg_names[MMIX_OUTPUT_REGNO (REGNO (x1))]);
|
fprintf (stream, "%s,", reg_names[MMIX_OUTPUT_REGNO (REGNO (x1))]);
|
|
|
if (REG_P (x2))
|
if (REG_P (x2))
|
{
|
{
|
fprintf (stream, "%s",
|
fprintf (stream, "%s",
|
reg_names[MMIX_OUTPUT_REGNO (REGNO (x2))]);
|
reg_names[MMIX_OUTPUT_REGNO (REGNO (x2))]);
|
return;
|
return;
|
}
|
}
|
else if (GET_CODE (x2) == CONST_INT
|
else if (GET_CODE (x2) == CONST_INT
|
&& CONST_OK_FOR_LETTER_P (INTVAL (x2), 'I'))
|
&& CONST_OK_FOR_LETTER_P (INTVAL (x2), 'I'))
|
{
|
{
|
output_addr_const (stream, x2);
|
output_addr_const (stream, x2);
|
return;
|
return;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
if (TARGET_BASE_ADDRESSES && mmix_legitimate_constant_p (x))
|
if (TARGET_BASE_ADDRESSES && mmix_legitimate_constant_p (x))
|
{
|
{
|
output_addr_const (stream, x);
|
output_addr_const (stream, x);
|
return;
|
return;
|
}
|
}
|
|
|
fatal_insn ("MMIX Internal: This is not a recognized address", x);
|
fatal_insn ("MMIX Internal: This is not a recognized address", x);
|
}
|
}
|
|
|
/* ASM_OUTPUT_REG_PUSH. */
|
/* ASM_OUTPUT_REG_PUSH. */
|
|
|
void
|
void
|
mmix_asm_output_reg_push (FILE *stream, int regno)
|
mmix_asm_output_reg_push (FILE *stream, int regno)
|
{
|
{
|
fprintf (stream, "\tSUBU %s,%s,8\n\tSTOU %s,%s,0\n",
|
fprintf (stream, "\tSUBU %s,%s,8\n\tSTOU %s,%s,0\n",
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_OUTPUT_REGNO (regno)],
|
reg_names[MMIX_OUTPUT_REGNO (regno)],
|
reg_names[MMIX_STACK_POINTER_REGNUM]);
|
reg_names[MMIX_STACK_POINTER_REGNUM]);
|
}
|
}
|
|
|
/* ASM_OUTPUT_REG_POP. */
|
/* ASM_OUTPUT_REG_POP. */
|
|
|
void
|
void
|
mmix_asm_output_reg_pop (FILE *stream, int regno)
|
mmix_asm_output_reg_pop (FILE *stream, int regno)
|
{
|
{
|
fprintf (stream, "\tLDOU %s,%s,0\n\tINCL %s,8\n",
|
fprintf (stream, "\tLDOU %s,%s,0\n\tINCL %s,8\n",
|
reg_names[MMIX_OUTPUT_REGNO (regno)],
|
reg_names[MMIX_OUTPUT_REGNO (regno)],
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_STACK_POINTER_REGNUM],
|
reg_names[MMIX_STACK_POINTER_REGNUM]);
|
reg_names[MMIX_STACK_POINTER_REGNUM]);
|
}
|
}
|
|
|
/* ASM_OUTPUT_ADDR_DIFF_ELT. */
|
/* ASM_OUTPUT_ADDR_DIFF_ELT. */
|
|
|
void
|
void
|
mmix_asm_output_addr_diff_elt (FILE *stream,
|
mmix_asm_output_addr_diff_elt (FILE *stream,
|
rtx body ATTRIBUTE_UNUSED,
|
rtx body ATTRIBUTE_UNUSED,
|
int value,
|
int value,
|
int rel)
|
int rel)
|
{
|
{
|
fprintf (stream, "\tTETRA L%d-L%d\n", value, rel);
|
fprintf (stream, "\tTETRA L%d-L%d\n", value, rel);
|
}
|
}
|
|
|
/* ASM_OUTPUT_ADDR_VEC_ELT. */
|
/* ASM_OUTPUT_ADDR_VEC_ELT. */
|
|
|
void
|
void
|
mmix_asm_output_addr_vec_elt (FILE *stream, int value)
|
mmix_asm_output_addr_vec_elt (FILE *stream, int value)
|
{
|
{
|
fprintf (stream, "\tOCTA L:%d\n", value);
|
fprintf (stream, "\tOCTA L:%d\n", value);
|
}
|
}
|
|
|
/* ASM_OUTPUT_SKIP. */
|
/* ASM_OUTPUT_SKIP. */
|
|
|
void
|
void
|
mmix_asm_output_skip (FILE *stream, int nbytes)
|
mmix_asm_output_skip (FILE *stream, int nbytes)
|
{
|
{
|
fprintf (stream, "\tLOC @+%d\n", nbytes);
|
fprintf (stream, "\tLOC @+%d\n", nbytes);
|
}
|
}
|
|
|
/* ASM_OUTPUT_ALIGN. */
|
/* ASM_OUTPUT_ALIGN. */
|
|
|
void
|
void
|
mmix_asm_output_align (FILE *stream, int power)
|
mmix_asm_output_align (FILE *stream, int power)
|
{
|
{
|
/* We need to record the needed alignment of this section in the object,
|
/* We need to record the needed alignment of this section in the object,
|
so we have to output an alignment directive. Use a .p2align (not
|
so we have to output an alignment directive. Use a .p2align (not
|
.align) so people will never have to wonder about whether the
|
.align) so people will never have to wonder about whether the
|
argument is in number of bytes or the log2 thereof. We do it in
|
argument is in number of bytes or the log2 thereof. We do it in
|
addition to the LOC directive, so nothing needs tweaking when
|
addition to the LOC directive, so nothing needs tweaking when
|
copy-pasting assembly into mmixal. */
|
copy-pasting assembly into mmixal. */
|
fprintf (stream, "\t.p2align %d\n", power);
|
fprintf (stream, "\t.p2align %d\n", power);
|
fprintf (stream, "\tLOC @+(%d-@)&%d\n", 1 << power, (1 << power) - 1);
|
fprintf (stream, "\tLOC @+(%d-@)&%d\n", 1 << power, (1 << power) - 1);
|
}
|
}
|
|
|
/* DBX_REGISTER_NUMBER. */
|
/* DBX_REGISTER_NUMBER. */
|
|
|
int
|
int
|
mmix_dbx_register_number (int regno)
|
mmix_dbx_register_number (int regno)
|
{
|
{
|
/* Adjust the register number to the one it will be output as, dammit.
|
/* Adjust the register number to the one it will be output as, dammit.
|
It'd be nice if we could check the assumption that we're filling a
|
It'd be nice if we could check the assumption that we're filling a
|
gap, but every register between the last saved register and parameter
|
gap, but every register between the last saved register and parameter
|
registers might be a valid parameter register. */
|
registers might be a valid parameter register. */
|
regno = MMIX_OUTPUT_REGNO (regno);
|
regno = MMIX_OUTPUT_REGNO (regno);
|
|
|
/* We need to renumber registers to get the number of the return address
|
/* We need to renumber registers to get the number of the return address
|
register in the range 0..255. It is also space-saving if registers
|
register in the range 0..255. It is also space-saving if registers
|
mentioned in the call-frame information (which uses this function by
|
mentioned in the call-frame information (which uses this function by
|
defaulting DWARF_FRAME_REGNUM to DBX_REGISTER_NUMBER) are numbered
|
defaulting DWARF_FRAME_REGNUM to DBX_REGISTER_NUMBER) are numbered
|
0 .. 63. So map 224 .. 256+15 -> 0 .. 47 and 0 .. 223 -> 48..223+48. */
|
0 .. 63. So map 224 .. 256+15 -> 0 .. 47 and 0 .. 223 -> 48..223+48. */
|
return regno >= 224 ? (regno - 224) : (regno + 48);
|
return regno >= 224 ? (regno - 224) : (regno + 48);
|
}
|
}
|
|
|
/* End of target macro support functions.
|
/* End of target macro support functions.
|
|
|
Now the MMIX port's own functions. First the exported ones. */
|
Now the MMIX port's own functions. First the exported ones. */
|
|
|
/* Wrapper for get_hard_reg_initial_val since integrate.h isn't included
|
/* Wrapper for get_hard_reg_initial_val since integrate.h isn't included
|
from insn-emit.c. */
|
from insn-emit.c. */
|
|
|
rtx
|
rtx
|
mmix_get_hard_reg_initial_val (enum machine_mode mode, int regno)
|
mmix_get_hard_reg_initial_val (enum machine_mode mode, int regno)
|
{
|
{
|
return get_hard_reg_initial_val (mode, regno);
|
return get_hard_reg_initial_val (mode, regno);
|
}
|
}
|
|
|
/* Nonzero when the function epilogue is simple enough that a single
|
/* Nonzero when the function epilogue is simple enough that a single
|
"POP %d,0" should be used even within the function. */
|
"POP %d,0" should be used even within the function. */
|
|
|
int
|
int
|
mmix_use_simple_return (void)
|
mmix_use_simple_return (void)
|
{
|
{
|
int regno;
|
int regno;
|
|
|
int stack_space_to_allocate
|
int stack_space_to_allocate
|
= (current_function_outgoing_args_size
|
= (current_function_outgoing_args_size
|
+ current_function_pretend_args_size
|
+ current_function_pretend_args_size
|
+ get_frame_size () + 7) & ~7;
|
+ get_frame_size () + 7) & ~7;
|
|
|
if (!TARGET_USE_RETURN_INSN || !reload_completed)
|
if (!TARGET_USE_RETURN_INSN || !reload_completed)
|
return 0;
|
return 0;
|
|
|
for (regno = 255;
|
for (regno = 255;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno--)
|
regno--)
|
/* Note that we assume that the frame-pointer-register is one of these
|
/* Note that we assume that the frame-pointer-register is one of these
|
registers, in which case we don't count it here. */
|
registers, in which case we don't count it here. */
|
if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
&& regs_ever_live[regno] && !call_used_regs[regno]))
|
&& regs_ever_live[regno] && !call_used_regs[regno]))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
return 0;
|
return 0;
|
|
|
if (frame_pointer_needed)
|
if (frame_pointer_needed)
|
stack_space_to_allocate += 8;
|
stack_space_to_allocate += 8;
|
|
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
stack_space_to_allocate += 16;
|
stack_space_to_allocate += 16;
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
stack_space_to_allocate += 8;
|
stack_space_to_allocate += 8;
|
|
|
return stack_space_to_allocate == 0;
|
return stack_space_to_allocate == 0;
|
}
|
}
|
|
|
|
|
/* Expands the function prologue into RTX. */
|
/* Expands the function prologue into RTX. */
|
|
|
void
|
void
|
mmix_expand_prologue (void)
|
mmix_expand_prologue (void)
|
{
|
{
|
HOST_WIDE_INT locals_size = get_frame_size ();
|
HOST_WIDE_INT locals_size = get_frame_size ();
|
int regno;
|
int regno;
|
HOST_WIDE_INT stack_space_to_allocate
|
HOST_WIDE_INT stack_space_to_allocate
|
= (current_function_outgoing_args_size
|
= (current_function_outgoing_args_size
|
+ current_function_pretend_args_size
|
+ current_function_pretend_args_size
|
+ locals_size + 7) & ~7;
|
+ locals_size + 7) & ~7;
|
HOST_WIDE_INT offset = -8;
|
HOST_WIDE_INT offset = -8;
|
|
|
/* Add room needed to save global non-register-stack registers. */
|
/* Add room needed to save global non-register-stack registers. */
|
for (regno = 255;
|
for (regno = 255;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno--)
|
regno--)
|
/* Note that we assume that the frame-pointer-register is one of these
|
/* Note that we assume that the frame-pointer-register is one of these
|
registers, in which case we don't count it here. */
|
registers, in which case we don't count it here. */
|
if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
if ((((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
&& regs_ever_live[regno] && !call_used_regs[regno]))
|
&& regs_ever_live[regno] && !call_used_regs[regno]))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
stack_space_to_allocate += 8;
|
stack_space_to_allocate += 8;
|
|
|
/* If we do have a frame-pointer, add room for it. */
|
/* If we do have a frame-pointer, add room for it. */
|
if (frame_pointer_needed)
|
if (frame_pointer_needed)
|
stack_space_to_allocate += 8;
|
stack_space_to_allocate += 8;
|
|
|
/* If we have a non-local label, we need to be able to unwind to it, so
|
/* If we have a non-local label, we need to be able to unwind to it, so
|
store the current register stack pointer. Also store the return
|
store the current register stack pointer. Also store the return
|
address if we do that. */
|
address if we do that. */
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
stack_space_to_allocate += 16;
|
stack_space_to_allocate += 16;
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
/* If we do have a saved return-address slot, add room for it. */
|
/* If we do have a saved return-address slot, add room for it. */
|
stack_space_to_allocate += 8;
|
stack_space_to_allocate += 8;
|
|
|
/* Make sure we don't get an unaligned stack. */
|
/* Make sure we don't get an unaligned stack. */
|
if ((stack_space_to_allocate % 8) != 0)
|
if ((stack_space_to_allocate % 8) != 0)
|
internal_error ("stack frame not a multiple of 8 bytes: %wd",
|
internal_error ("stack frame not a multiple of 8 bytes: %wd",
|
stack_space_to_allocate);
|
stack_space_to_allocate);
|
|
|
if (current_function_pretend_args_size)
|
if (current_function_pretend_args_size)
|
{
|
{
|
int mmix_first_vararg_reg
|
int mmix_first_vararg_reg
|
= (MMIX_FIRST_INCOMING_ARG_REGNUM
|
= (MMIX_FIRST_INCOMING_ARG_REGNUM
|
+ (MMIX_MAX_ARGS_IN_REGS
|
+ (MMIX_MAX_ARGS_IN_REGS
|
- current_function_pretend_args_size / 8));
|
- current_function_pretend_args_size / 8));
|
|
|
for (regno
|
for (regno
|
= MMIX_FIRST_INCOMING_ARG_REGNUM + MMIX_MAX_ARGS_IN_REGS - 1;
|
= MMIX_FIRST_INCOMING_ARG_REGNUM + MMIX_MAX_ARGS_IN_REGS - 1;
|
regno >= mmix_first_vararg_reg;
|
regno >= mmix_first_vararg_reg;
|
regno--)
|
regno--)
|
{
|
{
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
HOST_WIDE_INT stack_chunk
|
HOST_WIDE_INT stack_chunk
|
= stack_space_to_allocate > (256 - 8)
|
= stack_space_to_allocate > (256 - 8)
|
? (256 - 8) : stack_space_to_allocate;
|
? (256 - 8) : stack_space_to_allocate;
|
|
|
mmix_emit_sp_add (-stack_chunk);
|
mmix_emit_sp_add (-stack_chunk);
|
offset += stack_chunk;
|
offset += stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
}
|
}
|
|
|
/* These registers aren't actually saved (as in "will be
|
/* These registers aren't actually saved (as in "will be
|
restored"), so don't tell DWARF2 they're saved. */
|
restored"), so don't tell DWARF2 they're saved. */
|
emit_move_insn (gen_rtx_MEM (DImode,
|
emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)),
|
offset)),
|
gen_rtx_REG (DImode, regno));
|
gen_rtx_REG (DImode, regno));
|
offset -= 8;
|
offset -= 8;
|
}
|
}
|
}
|
}
|
|
|
/* Store the frame-pointer. */
|
/* Store the frame-pointer. */
|
|
|
if (frame_pointer_needed)
|
if (frame_pointer_needed)
|
{
|
{
|
rtx insn;
|
rtx insn;
|
|
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
HOST_WIDE_INT stack_chunk
|
HOST_WIDE_INT stack_chunk
|
= stack_space_to_allocate > (256 - 8 - 8)
|
= stack_space_to_allocate > (256 - 8 - 8)
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
|
|
mmix_emit_sp_add (-stack_chunk);
|
mmix_emit_sp_add (-stack_chunk);
|
|
|
offset += stack_chunk;
|
offset += stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
}
|
}
|
|
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)),
|
offset)),
|
hard_frame_pointer_rtx);
|
hard_frame_pointer_rtx);
|
RTX_FRAME_RELATED_P (insn) = 1;
|
RTX_FRAME_RELATED_P (insn) = 1;
|
insn = emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
|
insn = emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
|
stack_pointer_rtx,
|
stack_pointer_rtx,
|
GEN_INT (offset + 8)));
|
GEN_INT (offset + 8)));
|
RTX_FRAME_RELATED_P (insn) = 1;
|
RTX_FRAME_RELATED_P (insn) = 1;
|
offset -= 8;
|
offset -= 8;
|
}
|
}
|
|
|
if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
{
|
{
|
rtx tmpreg, retreg;
|
rtx tmpreg, retreg;
|
rtx insn;
|
rtx insn;
|
|
|
/* Store the return-address, if one is needed on the stack. We
|
/* Store the return-address, if one is needed on the stack. We
|
usually store it in a register when needed, but that doesn't work
|
usually store it in a register when needed, but that doesn't work
|
with -fexceptions. */
|
with -fexceptions. */
|
|
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
HOST_WIDE_INT stack_chunk
|
HOST_WIDE_INT stack_chunk
|
= stack_space_to_allocate > (256 - 8 - 8)
|
= stack_space_to_allocate > (256 - 8 - 8)
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
|
|
mmix_emit_sp_add (-stack_chunk);
|
mmix_emit_sp_add (-stack_chunk);
|
|
|
offset += stack_chunk;
|
offset += stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
}
|
}
|
|
|
tmpreg = gen_rtx_REG (DImode, 255);
|
tmpreg = gen_rtx_REG (DImode, 255);
|
retreg = gen_rtx_REG (DImode, MMIX_rJ_REGNUM);
|
retreg = gen_rtx_REG (DImode, MMIX_rJ_REGNUM);
|
|
|
/* Dwarf2 code is confused by the use of a temporary register for
|
/* Dwarf2 code is confused by the use of a temporary register for
|
storing the return address, so we have to express it as a note,
|
storing the return address, so we have to express it as a note,
|
which we attach to the actual store insn. */
|
which we attach to the actual store insn. */
|
emit_move_insn (tmpreg, retreg);
|
emit_move_insn (tmpreg, retreg);
|
|
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)),
|
offset)),
|
tmpreg);
|
tmpreg);
|
RTX_FRAME_RELATED_P (insn) = 1;
|
RTX_FRAME_RELATED_P (insn) = 1;
|
REG_NOTES (insn)
|
REG_NOTES (insn)
|
= gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
|
= gen_rtx_EXPR_LIST (REG_FRAME_RELATED_EXPR,
|
gen_rtx_SET (VOIDmode,
|
gen_rtx_SET (VOIDmode,
|
gen_rtx_MEM (DImode,
|
gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)),
|
offset)),
|
retreg),
|
retreg),
|
REG_NOTES (insn));
|
REG_NOTES (insn));
|
|
|
offset -= 8;
|
offset -= 8;
|
}
|
}
|
else if (MMIX_CFUN_HAS_LANDING_PAD)
|
else if (MMIX_CFUN_HAS_LANDING_PAD)
|
offset -= 8;
|
offset -= 8;
|
|
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
{
|
{
|
/* Store the register defining the numbering of local registers, so
|
/* Store the register defining the numbering of local registers, so
|
we know how long to unwind the register stack. */
|
we know how long to unwind the register stack. */
|
|
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
/* Get 8 less than otherwise, since we need to reach offset + 8. */
|
HOST_WIDE_INT stack_chunk
|
HOST_WIDE_INT stack_chunk
|
= stack_space_to_allocate > (256 - 8 - 8)
|
= stack_space_to_allocate > (256 - 8 - 8)
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
? (256 - 8 - 8) : stack_space_to_allocate;
|
|
|
mmix_emit_sp_add (-stack_chunk);
|
mmix_emit_sp_add (-stack_chunk);
|
|
|
offset += stack_chunk;
|
offset += stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
}
|
}
|
|
|
/* We don't tell dwarf2 about this one; we just have it to unwind
|
/* We don't tell dwarf2 about this one; we just have it to unwind
|
the register stack at landing pads. FIXME: It's a kludge because
|
the register stack at landing pads. FIXME: It's a kludge because
|
we can't describe the effect of the PUSHJ and PUSHGO insns on the
|
we can't describe the effect of the PUSHJ and PUSHGO insns on the
|
register stack at the moment. Best thing would be to handle it
|
register stack at the moment. Best thing would be to handle it
|
like stack-pointer offsets. Better: some hook into dwarf2out.c
|
like stack-pointer offsets. Better: some hook into dwarf2out.c
|
to produce DW_CFA_expression:s that specify the increment of rO,
|
to produce DW_CFA_expression:s that specify the increment of rO,
|
and unwind it at eh_return (preferred) or at the landing pad.
|
and unwind it at eh_return (preferred) or at the landing pad.
|
Then saves to $0..$G-1 could be specified through that register. */
|
Then saves to $0..$G-1 could be specified through that register. */
|
|
|
emit_move_insn (gen_rtx_REG (DImode, 255),
|
emit_move_insn (gen_rtx_REG (DImode, 255),
|
gen_rtx_REG (DImode,
|
gen_rtx_REG (DImode,
|
MMIX_rO_REGNUM));
|
MMIX_rO_REGNUM));
|
emit_move_insn (gen_rtx_MEM (DImode,
|
emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx, offset)),
|
plus_constant (stack_pointer_rtx, offset)),
|
gen_rtx_REG (DImode, 255));
|
gen_rtx_REG (DImode, 255));
|
offset -= 8;
|
offset -= 8;
|
}
|
}
|
|
|
/* After the return-address and the frame-pointer, we have the local
|
/* After the return-address and the frame-pointer, we have the local
|
variables. They're the ones that may have an "unaligned" size. */
|
variables. They're the ones that may have an "unaligned" size. */
|
offset -= (locals_size + 7) & ~7;
|
offset -= (locals_size + 7) & ~7;
|
|
|
/* Now store all registers that are global, i.e. not saved by the
|
/* Now store all registers that are global, i.e. not saved by the
|
register file machinery.
|
register file machinery.
|
|
|
It is assumed that the frame-pointer is one of these registers, so it
|
It is assumed that the frame-pointer is one of these registers, so it
|
is explicitly excluded in the count. */
|
is explicitly excluded in the count. */
|
|
|
for (regno = 255;
|
for (regno = 255;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno--)
|
regno--)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
&& regs_ever_live[regno] && ! call_used_regs[regno])
|
&& regs_ever_live[regno] && ! call_used_regs[regno])
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
{
|
{
|
rtx insn;
|
rtx insn;
|
|
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
HOST_WIDE_INT stack_chunk
|
HOST_WIDE_INT stack_chunk
|
= (stack_space_to_allocate > (256 - offset - 8)
|
= (stack_space_to_allocate > (256 - offset - 8)
|
? (256 - offset - 8) : stack_space_to_allocate);
|
? (256 - offset - 8) : stack_space_to_allocate);
|
|
|
mmix_emit_sp_add (-stack_chunk);
|
mmix_emit_sp_add (-stack_chunk);
|
offset += stack_chunk;
|
offset += stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
stack_space_to_allocate -= stack_chunk;
|
}
|
}
|
|
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
insn = emit_move_insn (gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)),
|
offset)),
|
gen_rtx_REG (DImode, regno));
|
gen_rtx_REG (DImode, regno));
|
RTX_FRAME_RELATED_P (insn) = 1;
|
RTX_FRAME_RELATED_P (insn) = 1;
|
offset -= 8;
|
offset -= 8;
|
}
|
}
|
|
|
/* Finally, allocate room for outgoing args and local vars if room
|
/* Finally, allocate room for outgoing args and local vars if room
|
wasn't allocated above. */
|
wasn't allocated above. */
|
if (stack_space_to_allocate)
|
if (stack_space_to_allocate)
|
mmix_emit_sp_add (-stack_space_to_allocate);
|
mmix_emit_sp_add (-stack_space_to_allocate);
|
}
|
}
|
|
|
/* Expands the function epilogue into RTX. */
|
/* Expands the function epilogue into RTX. */
|
|
|
void
|
void
|
mmix_expand_epilogue (void)
|
mmix_expand_epilogue (void)
|
{
|
{
|
HOST_WIDE_INT locals_size = get_frame_size ();
|
HOST_WIDE_INT locals_size = get_frame_size ();
|
int regno;
|
int regno;
|
HOST_WIDE_INT stack_space_to_deallocate
|
HOST_WIDE_INT stack_space_to_deallocate
|
= (current_function_outgoing_args_size
|
= (current_function_outgoing_args_size
|
+ current_function_pretend_args_size
|
+ current_function_pretend_args_size
|
+ locals_size + 7) & ~7;
|
+ locals_size + 7) & ~7;
|
|
|
/* The first address to access is beyond the outgoing_args area. */
|
/* The first address to access is beyond the outgoing_args area. */
|
HOST_WIDE_INT offset = current_function_outgoing_args_size;
|
HOST_WIDE_INT offset = current_function_outgoing_args_size;
|
|
|
/* Add the space for global non-register-stack registers.
|
/* Add the space for global non-register-stack registers.
|
It is assumed that the frame-pointer register can be one of these
|
It is assumed that the frame-pointer register can be one of these
|
registers, in which case it is excluded from the count when needed. */
|
registers, in which case it is excluded from the count when needed. */
|
for (regno = 255;
|
for (regno = 255;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno >= MMIX_FIRST_GLOBAL_REGNUM;
|
regno--)
|
regno--)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
&& regs_ever_live[regno] && !call_used_regs[regno])
|
&& regs_ever_live[regno] && !call_used_regs[regno])
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
stack_space_to_deallocate += 8;
|
stack_space_to_deallocate += 8;
|
|
|
/* Add in the space for register stack-pointer. If so, always add room
|
/* Add in the space for register stack-pointer. If so, always add room
|
for the saved PC. */
|
for the saved PC. */
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
stack_space_to_deallocate += 16;
|
stack_space_to_deallocate += 16;
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
/* If we have a saved return-address slot, add it in. */
|
/* If we have a saved return-address slot, add it in. */
|
stack_space_to_deallocate += 8;
|
stack_space_to_deallocate += 8;
|
|
|
/* Add in the frame-pointer. */
|
/* Add in the frame-pointer. */
|
if (frame_pointer_needed)
|
if (frame_pointer_needed)
|
stack_space_to_deallocate += 8;
|
stack_space_to_deallocate += 8;
|
|
|
/* Make sure we don't get an unaligned stack. */
|
/* Make sure we don't get an unaligned stack. */
|
if ((stack_space_to_deallocate % 8) != 0)
|
if ((stack_space_to_deallocate % 8) != 0)
|
internal_error ("stack frame not a multiple of octabyte: %wd",
|
internal_error ("stack frame not a multiple of octabyte: %wd",
|
stack_space_to_deallocate);
|
stack_space_to_deallocate);
|
|
|
/* We will add back small offsets to the stack pointer as we go.
|
/* We will add back small offsets to the stack pointer as we go.
|
First, we restore all registers that are global, i.e. not saved by
|
First, we restore all registers that are global, i.e. not saved by
|
the register file machinery. */
|
the register file machinery. */
|
|
|
for (regno = MMIX_FIRST_GLOBAL_REGNUM;
|
for (regno = MMIX_FIRST_GLOBAL_REGNUM;
|
regno <= 255;
|
regno <= 255;
|
regno++)
|
regno++)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
if (((regno != MMIX_FRAME_POINTER_REGNUM || !frame_pointer_needed)
|
&& regs_ever_live[regno] && !call_used_regs[regno])
|
&& regs_ever_live[regno] && !call_used_regs[regno])
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
|| IS_MMIX_EH_RETURN_DATA_REG (regno))
|
{
|
{
|
if (offset > 255)
|
if (offset > 255)
|
{
|
{
|
mmix_emit_sp_add (offset);
|
mmix_emit_sp_add (offset);
|
stack_space_to_deallocate -= offset;
|
stack_space_to_deallocate -= offset;
|
offset = 0;
|
offset = 0;
|
}
|
}
|
|
|
emit_move_insn (gen_rtx_REG (DImode, regno),
|
emit_move_insn (gen_rtx_REG (DImode, regno),
|
gen_rtx_MEM (DImode,
|
gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)));
|
offset)));
|
offset += 8;
|
offset += 8;
|
}
|
}
|
|
|
/* Here is where the local variables were. As in the prologue, they
|
/* Here is where the local variables were. As in the prologue, they
|
might be of an unaligned size. */
|
might be of an unaligned size. */
|
offset += (locals_size + 7) & ~7;
|
offset += (locals_size + 7) & ~7;
|
|
|
/* The saved register stack pointer is just below the frame-pointer
|
/* The saved register stack pointer is just below the frame-pointer
|
register. We don't need to restore it "manually"; the POP
|
register. We don't need to restore it "manually"; the POP
|
instruction does that. */
|
instruction does that. */
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
if (MMIX_CFUN_HAS_LANDING_PAD)
|
offset += 16;
|
offset += 16;
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
else if (MMIX_CFUN_NEEDS_SAVED_EH_RETURN_ADDRESS)
|
/* The return-address slot is just below the frame-pointer register.
|
/* The return-address slot is just below the frame-pointer register.
|
We don't need to restore it because we don't really use it. */
|
We don't need to restore it because we don't really use it. */
|
offset += 8;
|
offset += 8;
|
|
|
/* Get back the old frame-pointer-value. */
|
/* Get back the old frame-pointer-value. */
|
if (frame_pointer_needed)
|
if (frame_pointer_needed)
|
{
|
{
|
if (offset > 255)
|
if (offset > 255)
|
{
|
{
|
mmix_emit_sp_add (offset);
|
mmix_emit_sp_add (offset);
|
|
|
stack_space_to_deallocate -= offset;
|
stack_space_to_deallocate -= offset;
|
offset = 0;
|
offset = 0;
|
}
|
}
|
|
|
emit_move_insn (hard_frame_pointer_rtx,
|
emit_move_insn (hard_frame_pointer_rtx,
|
gen_rtx_MEM (DImode,
|
gen_rtx_MEM (DImode,
|
plus_constant (stack_pointer_rtx,
|
plus_constant (stack_pointer_rtx,
|
offset)));
|
offset)));
|
offset += 8;
|
offset += 8;
|
}
|
}
|
|
|
/* We do not need to restore pretended incoming args, just add back
|
/* We do not need to restore pretended incoming args, just add back
|
offset to sp. */
|
offset to sp. */
|
if (stack_space_to_deallocate != 0)
|
if (stack_space_to_deallocate != 0)
|
mmix_emit_sp_add (stack_space_to_deallocate);
|
mmix_emit_sp_add (stack_space_to_deallocate);
|
|
|
if (current_function_calls_eh_return)
|
if (current_function_calls_eh_return)
|
/* Adjust the (normal) stack-pointer to that of the receiver.
|
/* Adjust the (normal) stack-pointer to that of the receiver.
|
FIXME: It would be nice if we could also adjust the register stack
|
FIXME: It would be nice if we could also adjust the register stack
|
here, but we need to express it through DWARF 2 too. */
|
here, but we need to express it through DWARF 2 too. */
|
emit_insn (gen_adddi3 (stack_pointer_rtx, stack_pointer_rtx,
|
emit_insn (gen_adddi3 (stack_pointer_rtx, stack_pointer_rtx,
|
gen_rtx_REG (DImode,
|
gen_rtx_REG (DImode,
|
MMIX_EH_RETURN_STACKADJ_REGNUM)));
|
MMIX_EH_RETURN_STACKADJ_REGNUM)));
|
}
|
}
|
|
|
/* Output an optimal sequence for setting a register to a specific
|
/* Output an optimal sequence for setting a register to a specific
|
constant. Used in an alternative for const_ints in movdi, and when
|
constant. Used in an alternative for const_ints in movdi, and when
|
using large stack-frame offsets.
|
using large stack-frame offsets.
|
|
|
Use do_begin_end to say if a line-starting TAB and newline before the
|
Use do_begin_end to say if a line-starting TAB and newline before the
|
first insn and after the last insn is wanted. */
|
first insn and after the last insn is wanted. */
|
|
|
void
|
void
|
mmix_output_register_setting (FILE *stream,
|
mmix_output_register_setting (FILE *stream,
|
int regno,
|
int regno,
|
HOST_WIDEST_INT value,
|
HOST_WIDEST_INT value,
|
int do_begin_end)
|
int do_begin_end)
|
{
|
{
|
if (do_begin_end)
|
if (do_begin_end)
|
fprintf (stream, "\t");
|
fprintf (stream, "\t");
|
|
|
if (mmix_shiftable_wyde_value ((unsigned HOST_WIDEST_INT) value))
|
if (mmix_shiftable_wyde_value ((unsigned HOST_WIDEST_INT) value))
|
{
|
{
|
/* First, the one-insn cases. */
|
/* First, the one-insn cases. */
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
(unsigned HOST_WIDEST_INT)
|
(unsigned HOST_WIDEST_INT)
|
value);
|
value);
|
fprintf (stream, " %s,", reg_names[regno]);
|
fprintf (stream, " %s,", reg_names[regno]);
|
mmix_output_shifted_value (stream, (unsigned HOST_WIDEST_INT) value);
|
mmix_output_shifted_value (stream, (unsigned HOST_WIDEST_INT) value);
|
}
|
}
|
else if (mmix_shiftable_wyde_value (-(unsigned HOST_WIDEST_INT) value))
|
else if (mmix_shiftable_wyde_value (-(unsigned HOST_WIDEST_INT) value))
|
{
|
{
|
/* We do this to get a bit more legible assembly code. The next
|
/* We do this to get a bit more legible assembly code. The next
|
alternative is mostly redundant with this. */
|
alternative is mostly redundant with this. */
|
|
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
-(unsigned HOST_WIDEST_INT)
|
-(unsigned HOST_WIDEST_INT)
|
value);
|
value);
|
fprintf (stream, " %s,", reg_names[regno]);
|
fprintf (stream, " %s,", reg_names[regno]);
|
mmix_output_shifted_value (stream, -(unsigned HOST_WIDEST_INT) value);
|
mmix_output_shifted_value (stream, -(unsigned HOST_WIDEST_INT) value);
|
fprintf (stream, "\n\tNEGU %s,0,%s", reg_names[regno],
|
fprintf (stream, "\n\tNEGU %s,0,%s", reg_names[regno],
|
reg_names[regno]);
|
reg_names[regno]);
|
}
|
}
|
else if (mmix_shiftable_wyde_value (~(unsigned HOST_WIDEST_INT) value))
|
else if (mmix_shiftable_wyde_value (~(unsigned HOST_WIDEST_INT) value))
|
{
|
{
|
/* Slightly more expensive, the two-insn cases. */
|
/* Slightly more expensive, the two-insn cases. */
|
|
|
/* FIXME: We could of course also test if 0..255-N or ~(N | 1..255)
|
/* FIXME: We could of course also test if 0..255-N or ~(N | 1..255)
|
is shiftable, or any other one-insn transformation of the value.
|
is shiftable, or any other one-insn transformation of the value.
|
FIXME: Check first if the value is "shiftable" by two loading
|
FIXME: Check first if the value is "shiftable" by two loading
|
with two insns, since it makes more readable assembly code (if
|
with two insns, since it makes more readable assembly code (if
|
anyone else cares). */
|
anyone else cares). */
|
|
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
mmix_output_shiftvalue_op_from_str (stream, "SET",
|
~(unsigned HOST_WIDEST_INT)
|
~(unsigned HOST_WIDEST_INT)
|
value);
|
value);
|
fprintf (stream, " %s,", reg_names[regno]);
|
fprintf (stream, " %s,", reg_names[regno]);
|
mmix_output_shifted_value (stream, ~(unsigned HOST_WIDEST_INT) value);
|
mmix_output_shifted_value (stream, ~(unsigned HOST_WIDEST_INT) value);
|
fprintf (stream, "\n\tNOR %s,%s,0", reg_names[regno],
|
fprintf (stream, "\n\tNOR %s,%s,0", reg_names[regno],
|
reg_names[regno]);
|
reg_names[regno]);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* The generic case. 2..4 insns. */
|
/* The generic case. 2..4 insns. */
|
static const char *const higher_parts[] = {"L", "ML", "MH", "H"};
|
static const char *const higher_parts[] = {"L", "ML", "MH", "H"};
|
const char *op = "SET";
|
const char *op = "SET";
|
const char *line_begin = "";
|
const char *line_begin = "";
|
int insns = 0;
|
int insns = 0;
|
int i;
|
int i;
|
HOST_WIDEST_INT tmpvalue = value;
|
HOST_WIDEST_INT tmpvalue = value;
|
|
|
/* Compute the number of insns needed to output this constant. */
|
/* Compute the number of insns needed to output this constant. */
|
for (i = 0; i < 4 && tmpvalue != 0; i++)
|
for (i = 0; i < 4 && tmpvalue != 0; i++)
|
{
|
{
|
if (tmpvalue & 65535)
|
if (tmpvalue & 65535)
|
insns++;
|
insns++;
|
tmpvalue >>= 16;
|
tmpvalue >>= 16;
|
}
|
}
|
if (TARGET_BASE_ADDRESSES && insns == 3)
|
if (TARGET_BASE_ADDRESSES && insns == 3)
|
{
|
{
|
/* The number three is based on a static observation on
|
/* The number three is based on a static observation on
|
ghostscript-6.52. Two and four are excluded because there
|
ghostscript-6.52. Two and four are excluded because there
|
are too many such constants, and each unique constant (maybe
|
are too many such constants, and each unique constant (maybe
|
offset by 1..255) were used few times compared to other uses,
|
offset by 1..255) were used few times compared to other uses,
|
e.g. addresses.
|
e.g. addresses.
|
|
|
We use base-plus-offset addressing to force it into a global
|
We use base-plus-offset addressing to force it into a global
|
register; we just use a "LDA reg,VALUE", which will cause the
|
register; we just use a "LDA reg,VALUE", which will cause the
|
assembler and linker to DTRT (for constants as well as
|
assembler and linker to DTRT (for constants as well as
|
addresses). */
|
addresses). */
|
fprintf (stream, "LDA %s,", reg_names[regno]);
|
fprintf (stream, "LDA %s,", reg_names[regno]);
|
mmix_output_octa (stream, value, 0);
|
mmix_output_octa (stream, value, 0);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Output pertinent parts of the 4-wyde sequence.
|
/* Output pertinent parts of the 4-wyde sequence.
|
Still more to do if we want this to be optimal, but hey...
|
Still more to do if we want this to be optimal, but hey...
|
Note that the zero case has been handled above. */
|
Note that the zero case has been handled above. */
|
for (i = 0; i < 4 && value != 0; i++)
|
for (i = 0; i < 4 && value != 0; i++)
|
{
|
{
|
if (value & 65535)
|
if (value & 65535)
|
{
|
{
|
fprintf (stream, "%s%s%s %s,#%x", line_begin, op,
|
fprintf (stream, "%s%s%s %s,#%x", line_begin, op,
|
higher_parts[i], reg_names[regno],
|
higher_parts[i], reg_names[regno],
|
(int) (value & 65535));
|
(int) (value & 65535));
|
/* The first one sets the rest of the bits to 0, the next
|
/* The first one sets the rest of the bits to 0, the next
|
ones add set bits. */
|
ones add set bits. */
|
op = "INC";
|
op = "INC";
|
line_begin = "\n\t";
|
line_begin = "\n\t";
|
}
|
}
|
|
|
value >>= 16;
|
value >>= 16;
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
if (do_begin_end)
|
if (do_begin_end)
|
fprintf (stream, "\n");
|
fprintf (stream, "\n");
|
}
|
}
|
|
|
/* Return 1 if value is 0..65535*2**(16*N) for N=0..3.
|
/* Return 1 if value is 0..65535*2**(16*N) for N=0..3.
|
else return 0. */
|
else return 0. */
|
|
|
int
|
int
|
mmix_shiftable_wyde_value (unsigned HOST_WIDEST_INT value)
|
mmix_shiftable_wyde_value (unsigned HOST_WIDEST_INT value)
|
{
|
{
|
/* Shift by 16 bits per group, stop when we've found two groups with
|
/* Shift by 16 bits per group, stop when we've found two groups with
|
nonzero bits. */
|
nonzero bits. */
|
int i;
|
int i;
|
int has_candidate = 0;
|
int has_candidate = 0;
|
|
|
for (i = 0; i < 4; i++)
|
for (i = 0; i < 4; i++)
|
{
|
{
|
if (value & 65535)
|
if (value & 65535)
|
{
|
{
|
if (has_candidate)
|
if (has_candidate)
|
return 0;
|
return 0;
|
else
|
else
|
has_candidate = 1;
|
has_candidate = 1;
|
}
|
}
|
|
|
value >>= 16;
|
value >>= 16;
|
}
|
}
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Returns zero if code and mode is not a valid condition from a
|
/* Returns zero if code and mode is not a valid condition from a
|
compare-type insn. Nonzero if it is. The parameter op, if non-NULL,
|
compare-type insn. Nonzero if it is. The parameter op, if non-NULL,
|
is the comparison of mode is CC-somethingmode. */
|
is the comparison of mode is CC-somethingmode. */
|
|
|
int
|
int
|
mmix_valid_comparison (RTX_CODE code, enum machine_mode mode, rtx op)
|
mmix_valid_comparison (RTX_CODE code, enum machine_mode mode, rtx op)
|
{
|
{
|
if (mode == VOIDmode && op != NULL_RTX)
|
if (mode == VOIDmode && op != NULL_RTX)
|
mode = GET_MODE (op);
|
mode = GET_MODE (op);
|
|
|
/* We don't care to look at these, they should always be valid. */
|
/* We don't care to look at these, they should always be valid. */
|
if (mode == CCmode || mode == CC_UNSmode || mode == DImode)
|
if (mode == CCmode || mode == CC_UNSmode || mode == DImode)
|
return 1;
|
return 1;
|
|
|
if ((mode == CC_FPmode || mode == DFmode)
|
if ((mode == CC_FPmode || mode == DFmode)
|
&& (code == GT || code == LT))
|
&& (code == GT || code == LT))
|
return 1;
|
return 1;
|
|
|
if ((mode == CC_FPEQmode || mode == DFmode)
|
if ((mode == CC_FPEQmode || mode == DFmode)
|
&& (code == EQ || code == NE))
|
&& (code == EQ || code == NE))
|
return 1;
|
return 1;
|
|
|
if ((mode == CC_FUNmode || mode == DFmode)
|
if ((mode == CC_FUNmode || mode == DFmode)
|
&& (code == ORDERED || code == UNORDERED))
|
&& (code == ORDERED || code == UNORDERED))
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* X and Y are two things to compare using CODE. Emit a compare insn if
|
/* X and Y are two things to compare using CODE. Emit a compare insn if
|
possible and return the rtx for the cc-reg in the proper mode, or
|
possible and return the rtx for the cc-reg in the proper mode, or
|
NULL_RTX if this is not a valid comparison. */
|
NULL_RTX if this is not a valid comparison. */
|
|
|
rtx
|
rtx
|
mmix_gen_compare_reg (RTX_CODE code, rtx x, rtx y)
|
mmix_gen_compare_reg (RTX_CODE code, rtx x, rtx y)
|
{
|
{
|
enum machine_mode ccmode = SELECT_CC_MODE (code, x, y);
|
enum machine_mode ccmode = SELECT_CC_MODE (code, x, y);
|
rtx cc_reg;
|
rtx cc_reg;
|
|
|
/* FIXME: Do we get constants here? Of double mode? */
|
/* FIXME: Do we get constants here? Of double mode? */
|
enum machine_mode mode
|
enum machine_mode mode
|
= GET_MODE (x) == VOIDmode
|
= GET_MODE (x) == VOIDmode
|
? GET_MODE (y)
|
? GET_MODE (y)
|
: GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT ? DFmode : DImode;
|
: GET_MODE_CLASS (GET_MODE (x)) == MODE_FLOAT ? DFmode : DImode;
|
|
|
if (! mmix_valid_comparison (code, mode, x))
|
if (! mmix_valid_comparison (code, mode, x))
|
return NULL_RTX;
|
return NULL_RTX;
|
|
|
cc_reg = gen_reg_rtx (ccmode);
|
cc_reg = gen_reg_rtx (ccmode);
|
|
|
/* FIXME: Can we avoid emitting a compare insn here? */
|
/* FIXME: Can we avoid emitting a compare insn here? */
|
if (! REG_P (x) && ! REG_P (y))
|
if (! REG_P (x) && ! REG_P (y))
|
x = force_reg (mode, x);
|
x = force_reg (mode, x);
|
|
|
/* If it's not quite right yet, put y in a register. */
|
/* If it's not quite right yet, put y in a register. */
|
if (! REG_P (y)
|
if (! REG_P (y)
|
&& (GET_CODE (y) != CONST_INT
|
&& (GET_CODE (y) != CONST_INT
|
|| ! CONST_OK_FOR_LETTER_P (INTVAL (y), 'I')))
|
|| ! CONST_OK_FOR_LETTER_P (INTVAL (y), 'I')))
|
y = force_reg (mode, y);
|
y = force_reg (mode, y);
|
|
|
emit_insn (gen_rtx_SET (VOIDmode, cc_reg,
|
emit_insn (gen_rtx_SET (VOIDmode, cc_reg,
|
gen_rtx_COMPARE (ccmode, x, y)));
|
gen_rtx_COMPARE (ccmode, x, y)));
|
|
|
return cc_reg;
|
return cc_reg;
|
}
|
}
|
|
|
/* Local (static) helper functions. */
|
/* Local (static) helper functions. */
|
|
|
static void
|
static void
|
mmix_emit_sp_add (HOST_WIDE_INT offset)
|
mmix_emit_sp_add (HOST_WIDE_INT offset)
|
{
|
{
|
rtx insn;
|
rtx insn;
|
|
|
if (offset < 0)
|
if (offset < 0)
|
{
|
{
|
/* Negative stack-pointer adjustments are allocations and appear in
|
/* Negative stack-pointer adjustments are allocations and appear in
|
the prologue only. We mark them as frame-related so unwind and
|
the prologue only. We mark them as frame-related so unwind and
|
debug info is properly emitted for them. */
|
debug info is properly emitted for them. */
|
if (offset > -255)
|
if (offset > -255)
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
stack_pointer_rtx,
|
stack_pointer_rtx,
|
GEN_INT (offset)));
|
GEN_INT (offset)));
|
else
|
else
|
{
|
{
|
rtx tmpr = gen_rtx_REG (DImode, 255);
|
rtx tmpr = gen_rtx_REG (DImode, 255);
|
RTX_FRAME_RELATED_P (emit_move_insn (tmpr, GEN_INT (offset))) = 1;
|
RTX_FRAME_RELATED_P (emit_move_insn (tmpr, GEN_INT (offset))) = 1;
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
stack_pointer_rtx, tmpr));
|
stack_pointer_rtx, tmpr));
|
}
|
}
|
RTX_FRAME_RELATED_P (insn) = 1;
|
RTX_FRAME_RELATED_P (insn) = 1;
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Positive adjustments are in the epilogue only. Don't mark them
|
/* Positive adjustments are in the epilogue only. Don't mark them
|
as "frame-related" for unwind info. */
|
as "frame-related" for unwind info. */
|
if (CONST_OK_FOR_LETTER_P (offset, 'L'))
|
if (CONST_OK_FOR_LETTER_P (offset, 'L'))
|
emit_insn (gen_adddi3 (stack_pointer_rtx,
|
emit_insn (gen_adddi3 (stack_pointer_rtx,
|
stack_pointer_rtx,
|
stack_pointer_rtx,
|
GEN_INT (offset)));
|
GEN_INT (offset)));
|
else
|
else
|
{
|
{
|
rtx tmpr = gen_rtx_REG (DImode, 255);
|
rtx tmpr = gen_rtx_REG (DImode, 255);
|
emit_move_insn (tmpr, GEN_INT (offset));
|
emit_move_insn (tmpr, GEN_INT (offset));
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
insn = emit_insn (gen_adddi3 (stack_pointer_rtx,
|
stack_pointer_rtx, tmpr));
|
stack_pointer_rtx, tmpr));
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
/* Print operator suitable for doing something with a shiftable
|
/* Print operator suitable for doing something with a shiftable
|
wyde. The type of operator is passed as an asm output modifier. */
|
wyde. The type of operator is passed as an asm output modifier. */
|
|
|
static void
|
static void
|
mmix_output_shiftvalue_op_from_str (FILE *stream,
|
mmix_output_shiftvalue_op_from_str (FILE *stream,
|
const char *mainop,
|
const char *mainop,
|
HOST_WIDEST_INT value)
|
HOST_WIDEST_INT value)
|
{
|
{
|
static const char *const op_part[] = {"L", "ML", "MH", "H"};
|
static const char *const op_part[] = {"L", "ML", "MH", "H"};
|
int i;
|
int i;
|
|
|
if (! mmix_shiftable_wyde_value (value))
|
if (! mmix_shiftable_wyde_value (value))
|
{
|
{
|
char s[sizeof ("0xffffffffffffffff")];
|
char s[sizeof ("0xffffffffffffffff")];
|
sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value);
|
sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value);
|
internal_error ("MMIX Internal: %s is not a shiftable int", s);
|
internal_error ("MMIX Internal: %s is not a shiftable int", s);
|
}
|
}
|
|
|
for (i = 0; i < 4; i++)
|
for (i = 0; i < 4; i++)
|
{
|
{
|
/* We know we're through when we find one-bits in the low
|
/* We know we're through when we find one-bits in the low
|
16 bits. */
|
16 bits. */
|
if (value & 0xffff)
|
if (value & 0xffff)
|
{
|
{
|
fprintf (stream, "%s%s", mainop, op_part[i]);
|
fprintf (stream, "%s%s", mainop, op_part[i]);
|
return;
|
return;
|
}
|
}
|
value >>= 16;
|
value >>= 16;
|
}
|
}
|
|
|
/* No bits set? Then it must have been zero. */
|
/* No bits set? Then it must have been zero. */
|
fprintf (stream, "%sL", mainop);
|
fprintf (stream, "%sL", mainop);
|
}
|
}
|
|
|
/* Print a 64-bit value, optionally prefixed by assembly pseudo. */
|
/* Print a 64-bit value, optionally prefixed by assembly pseudo. */
|
|
|
static void
|
static void
|
mmix_output_octa (FILE *stream, HOST_WIDEST_INT value, int do_begin_end)
|
mmix_output_octa (FILE *stream, HOST_WIDEST_INT value, int do_begin_end)
|
{
|
{
|
/* Snipped from final.c:output_addr_const. We need to avoid the
|
/* Snipped from final.c:output_addr_const. We need to avoid the
|
presumed universal "0x" prefix. We can do it by replacing "0x" with
|
presumed universal "0x" prefix. We can do it by replacing "0x" with
|
"#0" here; we must avoid a space in the operands and no, the zero
|
"#0" here; we must avoid a space in the operands and no, the zero
|
won't cause the number to be assumed in octal format. */
|
won't cause the number to be assumed in octal format. */
|
char hex_format[sizeof (HOST_WIDEST_INT_PRINT_HEX)];
|
char hex_format[sizeof (HOST_WIDEST_INT_PRINT_HEX)];
|
|
|
if (do_begin_end)
|
if (do_begin_end)
|
fprintf (stream, "\tOCTA ");
|
fprintf (stream, "\tOCTA ");
|
|
|
strcpy (hex_format, HOST_WIDEST_INT_PRINT_HEX);
|
strcpy (hex_format, HOST_WIDEST_INT_PRINT_HEX);
|
hex_format[0] = '#';
|
hex_format[0] = '#';
|
hex_format[1] = '0';
|
hex_format[1] = '0';
|
|
|
/* Provide a few alternative output formats depending on the number, to
|
/* Provide a few alternative output formats depending on the number, to
|
improve legibility of assembler output. */
|
improve legibility of assembler output. */
|
if ((value < (HOST_WIDEST_INT) 0 && value > (HOST_WIDEST_INT) -10000)
|
if ((value < (HOST_WIDEST_INT) 0 && value > (HOST_WIDEST_INT) -10000)
|
|| (value >= (HOST_WIDEST_INT) 0 && value <= (HOST_WIDEST_INT) 16384))
|
|| (value >= (HOST_WIDEST_INT) 0 && value <= (HOST_WIDEST_INT) 16384))
|
fprintf (stream, "%d", (int) value);
|
fprintf (stream, "%d", (int) value);
|
else if (value > (HOST_WIDEST_INT) 0
|
else if (value > (HOST_WIDEST_INT) 0
|
&& value < ((HOST_WIDEST_INT) 1 << 31) * 2)
|
&& value < ((HOST_WIDEST_INT) 1 << 31) * 2)
|
fprintf (stream, "#%x", (unsigned int) value);
|
fprintf (stream, "#%x", (unsigned int) value);
|
else
|
else
|
fprintf (stream, hex_format, value);
|
fprintf (stream, hex_format, value);
|
|
|
if (do_begin_end)
|
if (do_begin_end)
|
fprintf (stream, "\n");
|
fprintf (stream, "\n");
|
}
|
}
|
|
|
/* Print the presumed shiftable wyde argument shifted into place (to
|
/* Print the presumed shiftable wyde argument shifted into place (to
|
be output with an operand). */
|
be output with an operand). */
|
|
|
static void
|
static void
|
mmix_output_shifted_value (FILE *stream, HOST_WIDEST_INT value)
|
mmix_output_shifted_value (FILE *stream, HOST_WIDEST_INT value)
|
{
|
{
|
int i;
|
int i;
|
|
|
if (! mmix_shiftable_wyde_value (value))
|
if (! mmix_shiftable_wyde_value (value))
|
{
|
{
|
char s[16+2+1];
|
char s[16+2+1];
|
sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value);
|
sprintf (s, HOST_WIDEST_INT_PRINT_HEX, value);
|
internal_error ("MMIX Internal: %s is not a shiftable int", s);
|
internal_error ("MMIX Internal: %s is not a shiftable int", s);
|
}
|
}
|
|
|
for (i = 0; i < 4; i++)
|
for (i = 0; i < 4; i++)
|
{
|
{
|
/* We know we're through when we find one-bits in the low 16 bits. */
|
/* We know we're through when we find one-bits in the low 16 bits. */
|
if (value & 0xffff)
|
if (value & 0xffff)
|
{
|
{
|
fprintf (stream, "#%x", (int) (value & 0xffff));
|
fprintf (stream, "#%x", (int) (value & 0xffff));
|
return;
|
return;
|
}
|
}
|
|
|
value >>= 16;
|
value >>= 16;
|
}
|
}
|
|
|
/* No bits set? Then it must have been zero. */
|
/* No bits set? Then it must have been zero. */
|
fprintf (stream, "0");
|
fprintf (stream, "0");
|
}
|
}
|
|
|
/* Output an MMIX condition name corresponding to an operator
|
/* Output an MMIX condition name corresponding to an operator
|
and operands:
|
and operands:
|
(comparison_operator [(comparison_operator ...) (const_int 0)])
|
(comparison_operator [(comparison_operator ...) (const_int 0)])
|
which means we have to look at *two* operators.
|
which means we have to look at *two* operators.
|
|
|
The argument "reversed" refers to reversal of the condition (not the
|
The argument "reversed" refers to reversal of the condition (not the
|
same as swapping the arguments). */
|
same as swapping the arguments). */
|
|
|
static void
|
static void
|
mmix_output_condition (FILE *stream, rtx x, int reversed)
|
mmix_output_condition (FILE *stream, rtx x, int reversed)
|
{
|
{
|
struct cc_conv
|
struct cc_conv
|
{
|
{
|
RTX_CODE cc;
|
RTX_CODE cc;
|
|
|
/* The normal output cc-code. */
|
/* The normal output cc-code. */
|
const char *const normal;
|
const char *const normal;
|
|
|
/* The reversed cc-code, or NULL if invalid. */
|
/* The reversed cc-code, or NULL if invalid. */
|
const char *const reversed;
|
const char *const reversed;
|
};
|
};
|
|
|
struct cc_type_conv
|
struct cc_type_conv
|
{
|
{
|
enum machine_mode cc_mode;
|
enum machine_mode cc_mode;
|
|
|
/* Terminated with {UNKNOWN, NULL, NULL} */
|
/* Terminated with {UNKNOWN, NULL, NULL} */
|
const struct cc_conv *const convs;
|
const struct cc_conv *const convs;
|
};
|
};
|
|
|
#undef CCEND
|
#undef CCEND
|
#define CCEND {UNKNOWN, NULL, NULL}
|
#define CCEND {UNKNOWN, NULL, NULL}
|
|
|
static const struct cc_conv cc_fun_convs[]
|
static const struct cc_conv cc_fun_convs[]
|
= {{ORDERED, "Z", "P"},
|
= {{ORDERED, "Z", "P"},
|
{UNORDERED, "P", "Z"},
|
{UNORDERED, "P", "Z"},
|
CCEND};
|
CCEND};
|
static const struct cc_conv cc_fp_convs[]
|
static const struct cc_conv cc_fp_convs[]
|
= {{GT, "P", NULL},
|
= {{GT, "P", NULL},
|
{LT, "N", NULL},
|
{LT, "N", NULL},
|
CCEND};
|
CCEND};
|
static const struct cc_conv cc_fpeq_convs[]
|
static const struct cc_conv cc_fpeq_convs[]
|
= {{NE, "Z", "P"},
|
= {{NE, "Z", "P"},
|
{EQ, "P", "Z"},
|
{EQ, "P", "Z"},
|
CCEND};
|
CCEND};
|
static const struct cc_conv cc_uns_convs[]
|
static const struct cc_conv cc_uns_convs[]
|
= {{GEU, "NN", "N"},
|
= {{GEU, "NN", "N"},
|
{GTU, "P", "NP"},
|
{GTU, "P", "NP"},
|
{LEU, "NP", "P"},
|
{LEU, "NP", "P"},
|
{LTU, "N", "NN"},
|
{LTU, "N", "NN"},
|
CCEND};
|
CCEND};
|
static const struct cc_conv cc_signed_convs[]
|
static const struct cc_conv cc_signed_convs[]
|
= {{NE, "NZ", "Z"},
|
= {{NE, "NZ", "Z"},
|
{EQ, "Z", "NZ"},
|
{EQ, "Z", "NZ"},
|
{GE, "NN", "N"},
|
{GE, "NN", "N"},
|
{GT, "P", "NP"},
|
{GT, "P", "NP"},
|
{LE, "NP", "P"},
|
{LE, "NP", "P"},
|
{LT, "N", "NN"},
|
{LT, "N", "NN"},
|
CCEND};
|
CCEND};
|
static const struct cc_conv cc_di_convs[]
|
static const struct cc_conv cc_di_convs[]
|
= {{NE, "NZ", "Z"},
|
= {{NE, "NZ", "Z"},
|
{EQ, "Z", "NZ"},
|
{EQ, "Z", "NZ"},
|
{GE, "NN", "N"},
|
{GE, "NN", "N"},
|
{GT, "P", "NP"},
|
{GT, "P", "NP"},
|
{LE, "NP", "P"},
|
{LE, "NP", "P"},
|
{LT, "N", "NN"},
|
{LT, "N", "NN"},
|
{GTU, "NZ", "Z"},
|
{GTU, "NZ", "Z"},
|
{LEU, "Z", "NZ"},
|
{LEU, "Z", "NZ"},
|
CCEND};
|
CCEND};
|
#undef CCEND
|
#undef CCEND
|
|
|
static const struct cc_type_conv cc_convs[]
|
static const struct cc_type_conv cc_convs[]
|
= {{CC_FUNmode, cc_fun_convs},
|
= {{CC_FUNmode, cc_fun_convs},
|
{CC_FPmode, cc_fp_convs},
|
{CC_FPmode, cc_fp_convs},
|
{CC_FPEQmode, cc_fpeq_convs},
|
{CC_FPEQmode, cc_fpeq_convs},
|
{CC_UNSmode, cc_uns_convs},
|
{CC_UNSmode, cc_uns_convs},
|
{CCmode, cc_signed_convs},
|
{CCmode, cc_signed_convs},
|
{DImode, cc_di_convs}};
|
{DImode, cc_di_convs}};
|
|
|
size_t i;
|
size_t i;
|
int j;
|
int j;
|
|
|
enum machine_mode mode = GET_MODE (XEXP (x, 0));
|
enum machine_mode mode = GET_MODE (XEXP (x, 0));
|
RTX_CODE cc = GET_CODE (x);
|
RTX_CODE cc = GET_CODE (x);
|
|
|
for (i = 0; i < ARRAY_SIZE (cc_convs); i++)
|
for (i = 0; i < ARRAY_SIZE (cc_convs); i++)
|
{
|
{
|
if (mode == cc_convs[i].cc_mode)
|
if (mode == cc_convs[i].cc_mode)
|
{
|
{
|
for (j = 0; cc_convs[i].convs[j].cc != UNKNOWN; j++)
|
for (j = 0; cc_convs[i].convs[j].cc != UNKNOWN; j++)
|
if (cc == cc_convs[i].convs[j].cc)
|
if (cc == cc_convs[i].convs[j].cc)
|
{
|
{
|
const char *mmix_cc
|
const char *mmix_cc
|
= (reversed ? cc_convs[i].convs[j].reversed
|
= (reversed ? cc_convs[i].convs[j].reversed
|
: cc_convs[i].convs[j].normal);
|
: cc_convs[i].convs[j].normal);
|
|
|
if (mmix_cc == NULL)
|
if (mmix_cc == NULL)
|
fatal_insn ("MMIX Internal: Trying to output invalidly\
|
fatal_insn ("MMIX Internal: Trying to output invalidly\
|
reversed condition:", x);
|
reversed condition:", x);
|
|
|
fprintf (stream, "%s", mmix_cc);
|
fprintf (stream, "%s", mmix_cc);
|
return;
|
return;
|
}
|
}
|
|
|
fatal_insn ("MMIX Internal: What's the CC of this?", x);
|
fatal_insn ("MMIX Internal: What's the CC of this?", x);
|
}
|
}
|
}
|
}
|
|
|
fatal_insn ("MMIX Internal: What is the CC of this?", x);
|
fatal_insn ("MMIX Internal: What is the CC of this?", x);
|
}
|
}
|
|
|
/* Return the bit-value for a const_int or const_double. */
|
/* Return the bit-value for a const_int or const_double. */
|
|
|
static HOST_WIDEST_INT
|
static HOST_WIDEST_INT
|
mmix_intval (rtx x)
|
mmix_intval (rtx x)
|
{
|
{
|
unsigned HOST_WIDEST_INT retval;
|
unsigned HOST_WIDEST_INT retval;
|
|
|
if (GET_CODE (x) == CONST_INT)
|
if (GET_CODE (x) == CONST_INT)
|
return INTVAL (x);
|
return INTVAL (x);
|
|
|
/* We make a little song and dance because converting to long long in
|
/* We make a little song and dance because converting to long long in
|
gcc-2.7.2 is broken. I still want people to be able to use it for
|
gcc-2.7.2 is broken. I still want people to be able to use it for
|
cross-compilation to MMIX. */
|
cross-compilation to MMIX. */
|
if (GET_CODE (x) == CONST_DOUBLE && GET_MODE (x) == VOIDmode)
|
if (GET_CODE (x) == CONST_DOUBLE && GET_MODE (x) == VOIDmode)
|
{
|
{
|
if (sizeof (HOST_WIDE_INT) < sizeof (HOST_WIDEST_INT))
|
if (sizeof (HOST_WIDE_INT) < sizeof (HOST_WIDEST_INT))
|
{
|
{
|
retval = (unsigned) CONST_DOUBLE_LOW (x) / 2;
|
retval = (unsigned) CONST_DOUBLE_LOW (x) / 2;
|
retval *= 2;
|
retval *= 2;
|
retval |= CONST_DOUBLE_LOW (x) & 1;
|
retval |= CONST_DOUBLE_LOW (x) & 1;
|
|
|
retval |=
|
retval |=
|
(unsigned HOST_WIDEST_INT) CONST_DOUBLE_HIGH (x)
|
(unsigned HOST_WIDEST_INT) CONST_DOUBLE_HIGH (x)
|
<< (HOST_BITS_PER_LONG);
|
<< (HOST_BITS_PER_LONG);
|
}
|
}
|
else
|
else
|
retval = CONST_DOUBLE_HIGH (x);
|
retval = CONST_DOUBLE_HIGH (x);
|
|
|
return retval;
|
return retval;
|
}
|
}
|
|
|
if (GET_CODE (x) == CONST_DOUBLE)
|
if (GET_CODE (x) == CONST_DOUBLE)
|
{
|
{
|
REAL_VALUE_TYPE value;
|
REAL_VALUE_TYPE value;
|
|
|
/* FIXME: This macro is not in the manual but should be. */
|
/* FIXME: This macro is not in the manual but should be. */
|
REAL_VALUE_FROM_CONST_DOUBLE (value, x);
|
REAL_VALUE_FROM_CONST_DOUBLE (value, x);
|
|
|
if (GET_MODE (x) == DFmode)
|
if (GET_MODE (x) == DFmode)
|
{
|
{
|
long bits[2];
|
long bits[2];
|
|
|
REAL_VALUE_TO_TARGET_DOUBLE (value, bits);
|
REAL_VALUE_TO_TARGET_DOUBLE (value, bits);
|
|
|
/* The double cast is necessary to avoid getting the long
|
/* The double cast is necessary to avoid getting the long
|
sign-extended to unsigned long long(!) when they're of
|
sign-extended to unsigned long long(!) when they're of
|
different size (usually 32-bit hosts). */
|
different size (usually 32-bit hosts). */
|
return
|
return
|
((unsigned HOST_WIDEST_INT) (unsigned long) bits[0]
|
((unsigned HOST_WIDEST_INT) (unsigned long) bits[0]
|
<< (unsigned HOST_WIDEST_INT) 32U)
|
<< (unsigned HOST_WIDEST_INT) 32U)
|
| (unsigned HOST_WIDEST_INT) (unsigned long) bits[1];
|
| (unsigned HOST_WIDEST_INT) (unsigned long) bits[1];
|
}
|
}
|
else if (GET_MODE (x) == SFmode)
|
else if (GET_MODE (x) == SFmode)
|
{
|
{
|
long bits;
|
long bits;
|
REAL_VALUE_TO_TARGET_SINGLE (value, bits);
|
REAL_VALUE_TO_TARGET_SINGLE (value, bits);
|
|
|
return (unsigned long) bits;
|
return (unsigned long) bits;
|
}
|
}
|
}
|
}
|
|
|
fatal_insn ("MMIX Internal: This is not a constant:", x);
|
fatal_insn ("MMIX Internal: This is not a constant:", x);
|
}
|
}
|
|
|
/* Worker function for TARGET_STRUCT_VALUE_RTX. */
|
/* Worker function for TARGET_STRUCT_VALUE_RTX. */
|
|
|
static rtx
|
static rtx
|
mmix_struct_value_rtx (tree fntype ATTRIBUTE_UNUSED,
|
mmix_struct_value_rtx (tree fntype ATTRIBUTE_UNUSED,
|
int incoming ATTRIBUTE_UNUSED)
|
int incoming ATTRIBUTE_UNUSED)
|
{
|
{
|
return gen_rtx_REG (Pmode, MMIX_STRUCT_VALUE_REGNUM);
|
return gen_rtx_REG (Pmode, MMIX_STRUCT_VALUE_REGNUM);
|
}
|
}
|
|
|
/*
|
/*
|
* Local variables:
|
* Local variables:
|
* eval: (c-set-style "gnu")
|
* eval: (c-set-style "gnu")
|
* indent-tabs-mode: t
|
* indent-tabs-mode: t
|
* End:
|
* End:
|
*/
|
*/
|
|
|
