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jeremybenn |
; Options for the CRIS port of the compiler.
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; Copyright (C) 2005, 2007 Free Software Foundation, Inc.
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;
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; This file is part of GCC.
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;
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; GCC is free software; you can redistribute it and/or modify it under
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; the terms of the GNU General Public License as published by the Free
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; Software Foundation; either version 3, or (at your option) any later
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; version.
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;
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; GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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; WARRANTY; without even the implied warranty of MERCHANTABILITY or
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; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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; for more details.
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;
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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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; .
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; TARGET_MUL_BUG: Whether or not to work around multiplication
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; instruction hardware bug when generating code for models where
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; it may be present. From the trouble report for Etrax 100 LX:
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; "A multiply operation may cause incorrect cache behaviour
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; under some specific circumstances. The problem can occur if
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; the instruction following the multiply instruction causes a
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; cache miss, and multiply operand 1 (source operand) bits
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; [31:27] matches the logical mapping of the mode register
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; address (0xb0....), and bits [9:2] of operand 1 matches the
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; TLB register address (0x258-0x25f). There is such a mapping
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; in kernel mode or when the MMU is off. Normally there is no
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; such mapping in user mode, and the problem will therefore
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; probably not occur in Linux user mode programs."
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;
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; We have no sure-fire way to know from within GCC that we're
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; compiling a user program. For example, -fpic/PIC is used in
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; libgcc which is linked into the kernel. However, the
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; workaround option -mno-mul-bug can be safely used per-package
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; when compiling programs. The same goes for general user-only
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; libraries such as glibc, since there's no user-space
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; driver-like program that gets a mapping of I/O registers (all
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; on the same page, including the TLB registers).
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mmul-bug-workaround
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Target Report Mask(MUL_BUG)
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Work around bug in multiplication instruction
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; TARGET_ETRAX4_ADD: Instruction-set additions from Etrax 4 and up.
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; (Just "lz".)
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metrax4
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Target Report Mask(ETRAX4_ADD)
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Compile for ETRAX 4 (CRIS v3)
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; See cris_handle_option.
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metrax100
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Target Report RejectNegative
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Compile for ETRAX 100 (CRIS v8)
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; See cris_handle_option.
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mno-etrax100
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Target Report RejectNegative Undocumented
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mpdebug
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Target Report Mask(PDEBUG)
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Emit verbose debug information in assembly code
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; TARGET_CCINIT: Whether to use condition-codes generated by
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; insns other than the immediately preceding compare/test insn.
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; Used to check for errors in notice_update_cc.
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mcc-init
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Target Report Mask(CCINIT)
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Do not use condition codes from normal instructions
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; TARGET_SIDE_EFFECT_PREFIXES: Whether to use side-effect
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; patterns. Used to debug the [rx=ry+i] type patterns.
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mside-effects
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Target Report RejectNegative Mask(SIDE_EFFECT_PREFIXES) Undocumented
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mno-side-effects
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Target Report RejectNegative InverseMask(SIDE_EFFECT_PREFIXES)
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Do not emit addressing modes with side-effect assignment
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; TARGET_STACK_ALIGN: Whether to *keep* (not force) alignment of
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; stack at 16 (or 32, depending on TARGET_ALIGN_BY_32) bits.
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mstack-align
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Target Report RejectNegative Mask(STACK_ALIGN) Undocumented
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mno-stack-align
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Target Report RejectNegative InverseMask(STACK_ALIGN)
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Do not tune stack alignment
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; TARGET_DATA_ALIGN: Whether to do alignment on individual
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; modifiable objects.
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mdata-align
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Target Report RejectNegative Mask(DATA_ALIGN) Undocumented
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mno-data-align
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Target Report RejectNegative InverseMask(DATA_ALIGN)
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Do not tune writable data alignment
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; TARGET_CONST_ALIGN: Whether to do alignment on individual
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; non-modifiable objects.
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mconst-align
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Target Report RejectNegative Mask(CONST_ALIGN) Undocumented
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mno-const-align
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Target Report RejectNegative InverseMask(CONST_ALIGN)
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Do not tune code and read-only data alignment
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; See cris_handle_option.
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m32-bit
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Target Report RejectNegative Undocumented
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; See cris_handle_option.
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m32bit
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Target Report RejectNegative
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Align code and data to 32 bits
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; See cris_handle_option.
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m16-bit
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Target Report RejectNegative Undocumented
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; See cris_handle_option.
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m16bit
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Target Report RejectNegative Undocumented
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; See cris_handle_option.
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m8-bit
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Target Report RejectNegative Undocumented
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; See cris_handle_option.
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m8bit
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Target Report RejectNegative
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Don't align items in code or data
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; TARGET_PROLOGUE_EPILOGUE: Whether or not to omit function
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; prologue and epilogue.
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mprologue-epilogue
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Target Report RejectNegative Mask(PROLOGUE_EPILOGUE) Undocumented
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mno-prologue-epilogue
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Target Report RejectNegative InverseMask(PROLOGUE_EPILOGUE)
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Do not emit function prologue or epilogue
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; We have to handle this m-option here since we can't wash it
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; off in both CC1_SPEC and CC1PLUS_SPEC.
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mbest-lib-options
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Target Report RejectNegative
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Use the most feature-enabling options allowed by other options
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; FIXME: The following comment relates to gcc before cris.opt.
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; Check it it's still valid:
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; We must call it "override-" since calling it "no-" will cause
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; gcc.c to forget it, if there's a "later" -mbest-lib-options.
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; Kludgy, but needed for some multilibbed files.
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moverride-best-lib-options
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Target Report RejectNegative
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Override -mbest-lib-options
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mcpu=
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Target Report RejectNegative Joined Undocumented Var(cris_cpu_str)
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march=
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Target Report RejectNegative Joined Var(cris_cpu_str)
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-march=ARCH Generate code for the specified chip or CPU version
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mtune=
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Target Report RejectNegative Joined Var(cris_tune_str)
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-mtune=ARCH Tune alignment for the specified chip or CPU version
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mmax-stackframe=
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Target Report RejectNegative Joined Var(cris_max_stackframe_str)
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-mmax-stackframe=SIZE Warn when a stackframe is larger than the specified size
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max-stackframe=
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Target Report RejectNegative Joined Undocumented Var(cris_max_stackframe_str)
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; TARGET_SVINTO: Currently this just affects alignment. FIXME:
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; Redundant with TARGET_ALIGN_BY_32, or put machine stuff here?
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; This and the others below could just as well be variables and
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; TARGET_* defines in cris.h.
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Mask(SVINTO)
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; TARGET_ALIGN_BY_32: Say that all alignment specifications say
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; to prefer 32 rather than 16 bits.
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Mask(ALIGN_BY_32)
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; TARGET_AVOID_GOTPLT is referred to in the .c and the .md so we
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; need to allocate the flag and macros here.
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Mask(AVOID_GOTPLT)
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