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jeremybenn |
/* Definitions of target machine for GNU compiler, Lattice Mico32 architecture.
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Contributed by Jon Beniston <jon@beniston.com>
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Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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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 it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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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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<http://www.gnu.org/licenses/>. */
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/*-------------------------------*/
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/* Run-time Target Specification */
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/*-------------------------------*/
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/* Print subsidiary information on the compiler version in use. */
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#ifndef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (LatticeMico32)")
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#endif
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/* Target CPU builtins. */
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#define TARGET_CPU_CPP_BUILTINS() \
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do \
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{ \
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builtin_define ("__lm32__"); \
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builtin_assert ("cpu=lm32"); \
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builtin_assert ("machine=lm32"); \
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if (TARGET_MULTIPLY_ENABLED) \
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builtin_define ("__multiply_enabled__"); \
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if (TARGET_DIVIDE_ENABLED) \
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builtin_define ("__divide_enabled__"); \
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if (TARGET_BARREL_SHIFT_ENABLED) \
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builtin_define ("__barrel_shift_enabled__"); \
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if (TARGET_SIGN_EXTEND_ENABLED) \
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builtin_define ("__sign_extend_enabled__"); \
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if (TARGET_USER_ENABLED) \
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builtin_define ("__user_enabled__"); \
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} \
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while (0)
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#undef ASM_SPEC
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#define ASM_SPEC "\
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%{mmultiply-enabled} \
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%{mdivide-enabled} \
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%{mbarrel-shift-enabled} \
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%{msign-extend-enabled} \
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%{muser-extend-enabled} \
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%{v} \
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"
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/* Let link script define all link options.
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Default to using simulator link script. */
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC ""
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#undef ENDFILE_SPEC
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#define ENDFILE_SPEC ""
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#undef LIB_SPEC
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#define LIB_SPEC "%{!T*:-T sim.ld}"
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#define OVERRIDE_OPTIONS lm32_override_options()
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extern int target_flags;
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/* Add -G xx support. */
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#undef SWITCH_TAKES_ARG
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#define SWITCH_TAKES_ARG(CHAR) \
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(DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
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#undef CC1_SPEC
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#define CC1_SPEC "%{G*}"
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/*---------------------------------*/
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/* Target machine storage layout. */
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/*---------------------------------*/
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#define BITS_BIG_ENDIAN 0
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#define BYTES_BIG_ENDIAN 1
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#define WORDS_BIG_ENDIAN 1
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#define LIBGCC2_WORDS_BIG_ENDIAN 1
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#define BITS_PER_UNIT 8
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#define BITS_PER_WORD 32
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#define UNITS_PER_WORD 4
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#define POINTER_SIZE 32
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#define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \
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do { \
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if (GET_MODE_CLASS (MODE) == MODE_INT \
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&& GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
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(MODE) = word_mode; \
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} while (0)
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#define PARM_BOUNDARY 32
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#define STACK_BOUNDARY 32
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#define BIGGEST_ALIGNMENT 64
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#define FUNCTION_BOUNDARY 32
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#define EMPTY_FIELD_BOUNDARY 32
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#define STRICT_ALIGNMENT 1
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#define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
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/* Make strings word-aligned so strcpy from constants will be faster. */
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#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
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(TREE_CODE (EXP) == STRING_CST \
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&& (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
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/* Make arrays and structures word-aligned to allow faster copying etc. */
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#define DATA_ALIGNMENT(TYPE, ALIGN) \
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((((ALIGN) < BITS_PER_WORD) \
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&& (TREE_CODE (TYPE) == ARRAY_TYPE \
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|| TREE_CODE (TYPE) == UNION_TYPE \
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|| TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
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/* We need this for the same reason as DATA_ALIGNMENT, namely to cause
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character arrays to be word-aligned so that `strcpy' calls that copy
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constants to character arrays can be done inline, and 'strcmp' can be
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optimised to use word loads. */
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#define LOCAL_ALIGNMENT(TYPE, ALIGN) \
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DATA_ALIGNMENT (TYPE, ALIGN)
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/*----------------------------------------*/
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/* Layout of source language data types. */
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/*----------------------------------------*/
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#define INT_TYPE_SIZE 32
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#define SHORT_TYPE_SIZE 16
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#define LONG_TYPE_SIZE 32
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#define LONG_LONG_TYPE_SIZE 64
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#define FLOAT_TYPE_SIZE 32
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#define DOUBLE_TYPE_SIZE 64
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#define LONG_DOUBLE_TYPE_SIZE 64
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#define DEFAULT_SIGNED_CHAR 0
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#define SIZE_TYPE "unsigned int"
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#define PTRDIFF_TYPE "int"
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/*---------------------------*/
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/* Standard register usage. */
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/*---------------------------*/
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#define FIRST_PSEUDO_REGISTER 32
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#define RV_REGNUM 1
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#define GP_REGNUM 26
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#define FP_REGNUM 27
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#define SP_REGNUM 28
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#define RA_REGNUM 29
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#define G_REG_P(X) ((X)<32)
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#define FIXED_REGISTERS \
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{ 1, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 1, 0, 1, 0, 1, 1}
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#define CALL_USED_REGISTERS \
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{ 1, 1, 1, 1, 1, 1, 1, 1, \
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1, 1, 1, 0, 0, 0, 0, 0, \
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0, 0, 0, 0, 0, 0, 0, 0, \
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0, 0, 1, 0, 1, 0, 1, 1}
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#define HARD_REGNO_NREGS(REGNO, MODE) \
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((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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#define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO)
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#define MODES_TIEABLE_P(MODE1, MODE2) \
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( GET_MODE_CLASS (MODE1) == MODE_INT \
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&& GET_MODE_CLASS (MODE2) == MODE_INT \
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&& GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \
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&& GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD)
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#define AVOID_CCMODE_COPIES
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/*----------------------------------*/
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/* Register classes and constants. */
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/*----------------------------------*/
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enum reg_class
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{
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NO_REGS,
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GENERAL_REGS,
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ALL_REGS,
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LIM_REG_CLASSES
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};
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#define N_REG_CLASSES (int) LIM_REG_CLASSES
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#define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" }
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#define REG_CLASS_CONTENTS \
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{ {0x00000000}, \
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{0xffffffff}, \
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{0xffffffff} \
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}
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#define REGNO_REG_CLASS(REGNO) \
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(G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS)
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#define CLASS_MAX_NREGS(CLASS, MODE) \
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((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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#define INDEX_REG_CLASS NO_REGS
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#define BASE_REG_CLASS GENERAL_REGS
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#define REGNO_OK_FOR_BASE_P(REGNO) \
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(G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO]))
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#define REGNO_OK_FOR_INDEX_P(REGNO) 0
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#define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
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/*----------------------------------------*/
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/* Stack Layout and Calling Conventions. */
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/*----------------------------------------*/
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#define STACK_GROWS_DOWNWARD 1
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#define FRAME_GROWS_DOWNWARD 1
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#define STACK_POINTER_OFFSET (UNITS_PER_WORD)
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#define STARTING_FRAME_OFFSET (UNITS_PER_WORD)
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#define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD)
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#define STACK_POINTER_REGNUM SP_REGNUM
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#define FRAME_POINTER_REGNUM FP_REGNUM
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#define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM
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#define RETURN_ADDR_RTX(count, frame) \
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lm32_return_addr_rtx (count, frame)
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/* FIXME - This is not yet supported. */
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#define STATIC_CHAIN_REGNUM 9
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#define ELIMINABLE_REGS \
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{{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
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{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \
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}
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#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
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(OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO)
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/*-----------------------------*/
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/* Function argument passing. */
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/*-----------------------------*/
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| 274 |
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#define ACCUMULATE_OUTGOING_ARGS 1
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| 276 |
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#define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0
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| 278 |
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/*--------------------------------*/
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/* Passing Arguments in Registers */
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/*--------------------------------*/
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| 282 |
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/* The first argument register. */
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| 283 |
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#define LM32_FIRST_ARG_REG 1
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| 284 |
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| 285 |
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/* The number of (integer) argument register available. */
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#define LM32_NUM_ARG_REGS 8
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| 287 |
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| 288 |
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#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
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| 289 |
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lm32_function_arg ((CUM), (MODE), (TYPE), (NAMED))
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| 291 |
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#define CUMULATIVE_ARGS int
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| 292 |
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| 293 |
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#define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \
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| 294 |
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(CUM) = 0
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| 295 |
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| 296 |
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#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
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| 297 |
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(CUM) += LM32_NUM_REGS2 (MODE, TYPE)
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| 298 |
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| 299 |
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#define FUNCTION_ARG_REGNO_P(r) \
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| 300 |
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(((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS))
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| 301 |
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| 302 |
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/*--------------------*/
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| 303 |
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/* Function results. */
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| 304 |
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/*--------------------*/
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| 305 |
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| 306 |
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#define FUNCTION_VALUE(VALTYPE, FUNC) \
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| 307 |
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gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \
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| 308 |
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&& TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \
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| 309 |
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? word_mode \
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| 310 |
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: TYPE_MODE (VALTYPE), \
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| 311 |
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RV_REGNUM)
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| 312 |
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| 313 |
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#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM)
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| 314 |
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| 315 |
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#define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM)
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| 316 |
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| 317 |
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#define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE)
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| 318 |
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| 319 |
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#define DEFAULT_PCC_STRUCT_RETURN 0
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| 320 |
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| 321 |
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/* Convert from bytes to ints. */
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| 322 |
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#define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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| 323 |
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| 324 |
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/* The number of (integer) registers required to hold a quantity of
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| 325 |
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type MODE. */
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| 326 |
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#define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE))
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| 327 |
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| 328 |
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/* The number of (integer) registers required to hold a quantity of
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| 329 |
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TYPE MODE. */
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| 330 |
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#define LM32_NUM_REGS2(MODE, TYPE) \
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| 331 |
|
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LM32_NUM_INTS ((MODE) == BLKmode ? \
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| 332 |
|
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int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
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| 333 |
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| 334 |
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#define STRUCT_VALUE 0
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| 335 |
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| 336 |
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/*---------------------------*/
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| 337 |
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/* Function entry and exit. */
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| 338 |
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/*---------------------------*/
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| 339 |
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| 340 |
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/*-------------*/
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| 341 |
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/* Profiling. */
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| 342 |
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/*-------------*/
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| 343 |
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| 344 |
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#define FUNCTION_PROFILER(FILE, LABELNO)
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/*---------------*/
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/* Trampolines. */
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/*---------------*/
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#define TRAMPOLINE_SIZE 0
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/*---------------------*/
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/* Addressing Modes. */
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/*---------------------*/
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#define CONSTANT_ADDRESS_P(X) \
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((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \
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|| GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \
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|| (GET_CODE (X) == CONST)))
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#define MAX_REGS_PER_ADDRESS 1
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#define STRICT_REG_OK_FOR_BASE_P(X) \
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(REGNO_OK_FOR_BASE_P (REGNO (X)))
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#define NONSTRICT_REG_OK_FOR_BASE_P(X) \
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(G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X)))
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#ifdef REG_OK_STRICT
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#define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X)
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#else
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#define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X)
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#endif
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#define LEGITIMATE_CONSTANT_P(X) lm32_legitimate_constant_p
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/*-------------------------*/
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/* Condition Code Status. */
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/*-------------------------*/
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#define REVERSIBLE_CC_MODE(MODE) 1
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/*---------*/
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/* Costs. */
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/*---------*/
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#define SLOW_BYTE_ACCESS 1
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#define NO_FUNCTION_CSE
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#define BRANCH_COST(speed_p, predictable_p) 4
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#define MOVE_RATIO(speed) (speed ? 24 : 3)
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/*------------*/
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/* Sections. */
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/*------------*/
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#define TEXT_SECTION_ASM_OP "\t.section\t.text"
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#define DATA_SECTION_ASM_OP "\t.section\t.data"
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#define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\""
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#define BSS_SECTION_ASM_OP "\t.section\t.bss"
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#define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\""
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/*-------*/
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/* PIC. */
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/*-------*/
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#define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM)
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#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic)
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#define LEGITIMATE_PIC_OPERAND_P(X) \
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(!(nonpic_symbol_mentioned_p (X)))
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/*-------------*/
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/* Assembler. */
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/*-------------*/
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#define ASM_COMMENT_START "#"
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#define ASM_APP_ON "#APP\n"
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#define ASM_APP_OFF "#NO_APP\n"
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#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
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do { \
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fputc ( '\t', FILE); \
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assemble_name (FILE, LABEL1); \
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fputs ( " = ", FILE); \
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assemble_name (FILE, LABEL2); \
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fputc ( '\n', FILE); \
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} while (0)
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/* Override default implementation in elfos.h to support -G. */
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#undef ASM_OUTPUT_ALIGNED_LOCAL
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#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \
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do { \
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if ((SIZE) <= g_switch_value) \
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switch_to_section (sbss_section); \
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else \
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switch_to_section (bss_section); \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
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if (!flag_inhibit_size_directive) \
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ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \
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ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \
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ASM_OUTPUT_LABEL(FILE, NAME); \
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ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \
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} while (0)
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/* Override default implementation in elfos.h to support -G. */
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#undef ASM_OUTPUT_ALIGNED_COMMON
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#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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do \
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{ \
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if ((SIZE) <= g_switch_value) \
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{ \
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switch_to_section (sbss_section); \
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(*targetm.asm_out.globalize_label) (FILE, NAME); \
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ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \
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if (!flag_inhibit_size_directive) \
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ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \
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ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \
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| 463 |
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ASM_OUTPUT_LABEL(FILE, NAME); \
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ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \
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| 465 |
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} \
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| 466 |
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else \
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| 467 |
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{ \
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| 468 |
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switch_to_section (bss_section); \
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| 469 |
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fprintf ((FILE), "%s", COMMON_ASM_OP); \
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| 470 |
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assemble_name ((FILE), (NAME)); \
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| 471 |
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fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \
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| 472 |
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(SIZE), (ALIGN) / BITS_PER_UNIT); \
|
| 473 |
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} \
|
| 474 |
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} \
|
| 475 |
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while (0)
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| 476 |
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|
| 477 |
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#define ASM_OUTPUT_LABEL(FILE, NAME) \
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| 478 |
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do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)
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| 479 |
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|
| 480 |
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#define ASM_OUTPUT_LABELREF(FILE,NAME) \
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| 481 |
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do { \
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| 482 |
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const char *xname = (NAME); \
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| 483 |
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if (xname[0] == '@') \
|
| 484 |
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xname += 1; \
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| 485 |
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if (xname[0] == '*') \
|
| 486 |
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xname += 1; \
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| 487 |
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fputs (xname, FILE); \
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| 488 |
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} while (0)
|
| 489 |
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|
| 490 |
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#define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \
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| 491 |
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do { \
|
| 492 |
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assemble_name (STREAM, XSTR (SYMBOL, 0)); \
|
| 493 |
|
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} while (0)
|
| 494 |
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|
| 495 |
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#define GLOBAL_ASM_OP "\t.global\t"
|
| 496 |
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|
| 497 |
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#define REGISTER_NAMES \
|
| 498 |
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{ \
|
| 499 |
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
|
| 500 |
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
|
| 501 |
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
|
| 502 |
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"r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"}
|
| 503 |
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|
| 504 |
|
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#define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
|
| 505 |
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(((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*'))
|
| 506 |
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|
| 507 |
|
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#define PRINT_OPERAND(FILE, X, CODE) \
|
| 508 |
|
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lm32_print_operand (FILE, X, CODE)
|
| 509 |
|
|
|
| 510 |
|
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#define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
|
| 511 |
|
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lm32_print_operand_address (FILE, ADDR)
|
| 512 |
|
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|
| 513 |
|
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#ifndef LOCAL_LABEL_PREFIX
|
| 514 |
|
|
#define LOCAL_LABEL_PREFIX "."
|
| 515 |
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#endif
|
| 516 |
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|
| 517 |
|
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#define ASM_OUTPUT_ALIGN(FILE,LOG) \
|
| 518 |
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do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0)
|
| 519 |
|
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|
| 520 |
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#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
|
| 521 |
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do { \
|
| 522 |
|
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char label[64]; \
|
| 523 |
|
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ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
|
| 524 |
|
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fprintf (FILE, "\n\t.word\t"); \
|
| 525 |
|
|
assemble_name (FILE, label); \
|
| 526 |
|
|
fprintf (FILE, "\n"); \
|
| 527 |
|
|
} while (0)
|
| 528 |
|
|
|
| 529 |
|
|
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
|
| 530 |
|
|
do { \
|
| 531 |
|
|
char label[64]; \
|
| 532 |
|
|
fprintf (FILE, "\t.word\t("); \
|
| 533 |
|
|
ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \
|
| 534 |
|
|
assemble_name (FILE, label); \
|
| 535 |
|
|
fprintf (FILE, "-"); \
|
| 536 |
|
|
ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \
|
| 537 |
|
|
assemble_name (FILE, label); \
|
| 538 |
|
|
fprintf (FILE, ")\n"); \
|
| 539 |
|
|
} while (0)
|
| 540 |
|
|
|
| 541 |
|
|
/*-------------*/
|
| 542 |
|
|
/* Debugging. */
|
| 543 |
|
|
/*-------------*/
|
| 544 |
|
|
|
| 545 |
|
|
#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
|
| 546 |
|
|
|
| 547 |
|
|
#define CAN_DEBUG_WITHOUT_FP
|
| 548 |
|
|
|
| 549 |
|
|
#define DEFAULT_GDB_EXTENSIONS 1
|
| 550 |
|
|
|
| 551 |
|
|
/*--------*/
|
| 552 |
|
|
/* Misc. */
|
| 553 |
|
|
/*--------*/
|
| 554 |
|
|
|
| 555 |
|
|
#define CASE_VECTOR_MODE Pmode
|
| 556 |
|
|
|
| 557 |
|
|
#define WORD_REGISTER_OPERATIONS
|
| 558 |
|
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|
| 559 |
|
|
#define LOAD_EXTEND_OP(MODE) ZERO_EXTEND
|
| 560 |
|
|
|
| 561 |
|
|
#define SHORT_IMMEDIATES_SIGN_EXTEND
|
| 562 |
|
|
|
| 563 |
|
|
#define MOVE_MAX UNITS_PER_WORD
|
| 564 |
|
|
#define MAX_MOVE_MAX 4
|
| 565 |
|
|
|
| 566 |
|
|
#define SHIFT_COUNT_TRUNCATED 1
|
| 567 |
|
|
|
| 568 |
|
|
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
|
| 569 |
|
|
|
| 570 |
|
|
#define Pmode SImode
|
| 571 |
|
|
|
| 572 |
|
|
#define FUNCTION_MODE SImode
|
| 573 |
|
|
|
| 574 |
|
|
#ifndef NO_IMPLICIT_EXTERN_C
|
| 575 |
|
|
#define NO_IMPLICIT_EXTERN_C
|
| 576 |
|
|
#endif
|
| 577 |
|
|
|
| 578 |
|
|
#define STORE_FLAG_VALUE 1
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