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Diffstat (limited to 'gcc/config/m68k/m68k.h')
| -rw-r--r-- | gcc/config/m68k/m68k.h | 1034 |
1 files changed, 1034 insertions, 0 deletions
diff --git a/gcc/config/m68k/m68k.h b/gcc/config/m68k/m68k.h new file mode 100644 index 000000000..71b7c4f27 --- /dev/null +++ b/gcc/config/m68k/m68k.h @@ -0,0 +1,1034 @@ +/* Definitions of target machine for GCC for Motorola 680x0/ColdFire. + Copyright (C) 1987, 1988, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +/* We need to have MOTOROLA always defined (either 0 or 1) because we use + if-statements and ?: on it. This way we have compile-time error checking + for both the MOTOROLA and MIT code paths. We do rely on the host compiler + to optimize away all constant tests. */ +#if MOTOROLA /* Use the Motorola assembly syntax. */ +# define TARGET_VERSION fprintf (stderr, " (68k, Motorola syntax)") +#else +# define MOTOROLA 0 /* Use the MIT assembly syntax. */ +# define TARGET_VERSION fprintf (stderr, " (68k, MIT syntax)") +#endif + +/* Handle --with-cpu default option from configure script. */ +#define OPTION_DEFAULT_SPECS \ + { "cpu", "%{!mc68000:%{!m68000:%{!m68302:%{!m68010:%{!mc68020:%{!m68020:\ +%{!m68030:%{!m68040:%{!m68020-40:%{!m68020-60:%{!m68060:%{!mcpu32:\ +%{!m68332:%{!m5200:%{!m5206e:%{!m528x:%{!m5307:%{!m5407:%{!mcfv4e:\ +%{!mcpu=*:%{!march=*:-%(VALUE)}}}}}}}}}}}}}}}}}}}}}" }, + +/* Pass flags to gas indicating which type of processor we have. This + can be simplified when we can rely on the assembler supporting .cpu + and .arch directives. */ + +#define ASM_CPU_SPEC "\ +%{m68851}%{mno-68851} %{m68881}%{mno-68881} %{msoft-float:-mno-float} \ +%{m68000}%{m68302}%{mc68000}%{m68010}%{m68020}%{mc68020}%{m68030}\ +%{m68040}%{m68020-40:-m68040}%{m68020-60:-m68040}\ +%{m68060}%{mcpu32}%{m68332}%{m5200}%{m5206e}%{m528x}%{m5307}%{m5407}%{mcfv4e}\ +%{mcpu=*:-mcpu=%*}%{march=*:-march=%*}\ +" +#define ASM_PCREL_SPEC "%{fPIC|fpic|mpcrel:--pcrel} \ + %{msep-data|mid-shared-library:--pcrel} \ +" + +#define ASM_SPEC "%(asm_cpu_spec) %(asm_pcrel_spec)" + +#define EXTRA_SPECS \ + { "asm_cpu_spec", ASM_CPU_SPEC }, \ + { "asm_pcrel_spec", ASM_PCREL_SPEC }, \ + SUBTARGET_EXTRA_SPECS + +#define SUBTARGET_EXTRA_SPECS + +/* Note that some other tm.h files include this one and then override + many of the definitions that relate to assembler syntax. */ + +#define TARGET_CPU_CPP_BUILTINS() \ + do \ + { \ + builtin_define ("__m68k__"); \ + builtin_define_std ("mc68000"); \ + /* The other mc680x0 macros have traditionally been derived \ + from the tuning setting. For example, -m68020-60 defines \ + m68060, even though it generates pure 68020 code. */ \ + switch (m68k_tune) \ + { \ + case u68010: \ + builtin_define_std ("mc68010"); \ + break; \ + \ + case u68020: \ + builtin_define_std ("mc68020"); \ + break; \ + \ + case u68030: \ + builtin_define_std ("mc68030"); \ + break; \ + \ + case u68040: \ + builtin_define_std ("mc68040"); \ + break; \ + \ + case u68060: \ + builtin_define_std ("mc68060"); \ + break; \ + \ + case u68020_60: \ + builtin_define_std ("mc68060"); \ + /* Fall through. */ \ + case u68020_40: \ + builtin_define_std ("mc68040"); \ + builtin_define_std ("mc68030"); \ + builtin_define_std ("mc68020"); \ + break; \ + \ + case ucpu32: \ + builtin_define_std ("mc68332"); \ + builtin_define_std ("mcpu32"); \ + builtin_define_std ("mc68020"); \ + break; \ + \ + case ucfv1: \ + builtin_define ("__mcfv1__"); \ + break; \ + \ + case ucfv2: \ + builtin_define ("__mcfv2__"); \ + break; \ + \ + case ucfv3: \ + builtin_define ("__mcfv3__"); \ + break; \ + \ + case ucfv4: \ + builtin_define ("__mcfv4__"); \ + break; \ + \ + case ucfv4e: \ + builtin_define ("__mcfv4e__"); \ + break; \ + \ + case ucfv5: \ + builtin_define ("__mcfv5__"); \ + break; \ + \ + default: \ + break; \ + } \ + \ + if (TARGET_68881) \ + builtin_define ("__HAVE_68881__"); \ + \ + if (TARGET_COLDFIRE) \ + { \ + const char *tmp; \ + \ + tmp = m68k_cpp_cpu_ident ("cf"); \ + if (tmp) \ + builtin_define (tmp); \ + tmp = m68k_cpp_cpu_family ("cf"); \ + if (tmp) \ + builtin_define (tmp); \ + builtin_define ("__mcoldfire__"); \ + \ + if (TARGET_ISAC) \ + builtin_define ("__mcfisac__"); \ + else if (TARGET_ISAB) \ + { \ + builtin_define ("__mcfisab__"); \ + /* ISA_B: Legacy 5407 defines. */ \ + builtin_define ("__mcf5400__"); \ + builtin_define ("__mcf5407__"); \ + } \ + else if (TARGET_ISAAPLUS) \ + { \ + builtin_define ("__mcfisaaplus__"); \ + /* ISA_A+: legacy defines. */ \ + builtin_define ("__mcf528x__"); \ + builtin_define ("__mcf5200__"); \ + } \ + else \ + { \ + builtin_define ("__mcfisaa__"); \ + /* ISA_A: legacy defines. */ \ + switch (m68k_tune) \ + { \ + case ucfv2: \ + builtin_define ("__mcf5200__"); \ + break; \ + \ + case ucfv3: \ + builtin_define ("__mcf5307__"); \ + builtin_define ("__mcf5300__"); \ + break; \ + \ + default: \ + break; \ + } \ + } \ + } \ + \ + if (TARGET_COLDFIRE_FPU) \ + builtin_define ("__mcffpu__"); \ + \ + if (TARGET_CF_HWDIV) \ + builtin_define ("__mcfhwdiv__"); \ + \ + if (TARGET_FIDOA) \ + builtin_define ("__mfido__"); \ + \ + builtin_assert ("cpu=m68k"); \ + builtin_assert ("machine=m68k"); \ + } \ + while (0) + +/* Classify the groups of pseudo-ops used to assemble QI, HI and SI + quantities. */ +#define INT_OP_STANDARD 0 /* .byte, .short, .long */ +#define INT_OP_DOT_WORD 1 /* .byte, .word, .long */ +#define INT_OP_NO_DOT 2 /* byte, short, long */ +#define INT_OP_DC 3 /* dc.b, dc.w, dc.l */ + +/* Set the default. */ +#define INT_OP_GROUP INT_OP_DOT_WORD + +/* Bit values used by m68k-devices.def to identify processor capabilities. */ +#define FL_BITFIELD (1 << 0) /* Support bitfield instructions. */ +#define FL_68881 (1 << 1) /* (Default) support for 68881/2. */ +#define FL_COLDFIRE (1 << 2) /* ColdFire processor. */ +#define FL_CF_HWDIV (1 << 3) /* ColdFire hardware divide supported. */ +#define FL_CF_MAC (1 << 4) /* ColdFire MAC unit supported. */ +#define FL_CF_EMAC (1 << 5) /* ColdFire eMAC unit supported. */ +#define FL_CF_EMAC_B (1 << 6) /* ColdFire eMAC-B unit supported. */ +#define FL_CF_USP (1 << 7) /* ColdFire User Stack Pointer supported. */ +#define FL_CF_FPU (1 << 8) /* ColdFire FPU supported. */ +#define FL_ISA_68000 (1 << 9) +#define FL_ISA_68010 (1 << 10) +#define FL_ISA_68020 (1 << 11) +#define FL_ISA_68040 (1 << 12) +#define FL_ISA_A (1 << 13) +#define FL_ISA_APLUS (1 << 14) +#define FL_ISA_B (1 << 15) +#define FL_ISA_C (1 << 16) +#define FL_FIDOA (1 << 17) +#define FL_MMU 0 /* Used by multilib machinery. */ +#define FL_UCLINUX 0 /* Used by multilib machinery. */ + +#define TARGET_68010 ((m68k_cpu_flags & FL_ISA_68010) != 0) +#define TARGET_68020 ((m68k_cpu_flags & FL_ISA_68020) != 0) +#define TARGET_68040 ((m68k_cpu_flags & FL_ISA_68040) != 0) +#define TARGET_COLDFIRE ((m68k_cpu_flags & FL_COLDFIRE) != 0) +#define TARGET_COLDFIRE_FPU (m68k_fpu == FPUTYPE_COLDFIRE) +#define TARGET_68881 (m68k_fpu == FPUTYPE_68881) +#define TARGET_FIDOA ((m68k_cpu_flags & FL_FIDOA) != 0) + +/* Size (in bytes) of FPU registers. */ +#define TARGET_FP_REG_SIZE (TARGET_COLDFIRE ? 8 : 12) + +#define TARGET_ISAAPLUS ((m68k_cpu_flags & FL_ISA_APLUS) != 0) +#define TARGET_ISAB ((m68k_cpu_flags & FL_ISA_B) != 0) +#define TARGET_ISAC ((m68k_cpu_flags & FL_ISA_C) != 0) + +/* Some instructions are common to more than one ISA. */ +#define ISA_HAS_MVS_MVZ (TARGET_ISAB || TARGET_ISAC) +#define ISA_HAS_FF1 (TARGET_ISAAPLUS || TARGET_ISAC) + +#define TUNE_68000 (m68k_tune == u68000) +#define TUNE_68010 (m68k_tune == u68010) +#define TUNE_68000_10 (TUNE_68000 || TUNE_68010) +#define TUNE_68030 (m68k_tune == u68030 \ + || m68k_tune == u68020_40 \ + || m68k_tune == u68020_60) +#define TUNE_68040 (m68k_tune == u68040 \ + || m68k_tune == u68020_40 \ + || m68k_tune == u68020_60) +#define TUNE_68060 (m68k_tune == u68060 || m68k_tune == u68020_60) +#define TUNE_68040_60 (TUNE_68040 || TUNE_68060) +#define TUNE_CPU32 (m68k_tune == ucpu32) +#define TUNE_CFV1 (m68k_tune == ucfv1) +#define TUNE_CFV2 (m68k_tune == ucfv2) +#define TUNE_CFV3 (m68k_tune == ucfv3) +#define TUNE_CFV4 (m68k_tune == ucfv4 || m68k_tune == ucfv4e) + +#define TUNE_MAC ((m68k_tune_flags & FL_CF_MAC) != 0) +#define TUNE_EMAC ((m68k_tune_flags & FL_CF_EMAC) != 0) + +/* These are meant to be redefined in the host dependent files */ +#define SUBTARGET_OVERRIDE_OPTIONS + +/* target machine storage layout */ + +/* "long double" is the same as "double" on ColdFire and fido + targets. */ + +#define LONG_DOUBLE_TYPE_SIZE \ + ((TARGET_COLDFIRE || TARGET_FIDOA) ? 64 : 80) + +/* We need to know the size of long double at compile-time in libgcc2. */ + +#if defined(__mcoldfire__) || defined(__mfido__) +#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 +#else +#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 80 +#endif + +/* Set the value of FLT_EVAL_METHOD in float.h. When using 68040 fp + instructions, we get proper intermediate rounding, otherwise we + get extended precision results. */ +#define TARGET_FLT_EVAL_METHOD ((TARGET_68040 || ! TARGET_68881) ? 0 : 2) + +#define BITS_BIG_ENDIAN 1 +#define BYTES_BIG_ENDIAN 1 +#define WORDS_BIG_ENDIAN 1 + +#define UNITS_PER_WORD 4 + +#define PARM_BOUNDARY (TARGET_SHORT ? 16 : 32) +#define STACK_BOUNDARY 16 +#define FUNCTION_BOUNDARY 16 +#define EMPTY_FIELD_BOUNDARY 16 +/* ColdFire and fido strongly prefer a 32-bit aligned stack. */ +#define PREFERRED_STACK_BOUNDARY \ + ((TARGET_COLDFIRE || TARGET_FIDOA) ? 32 : 16) + +/* No data type wants to be aligned rounder than this. + Most published ABIs say that ints should be aligned on 16-bit + boundaries, but CPUs with 32-bit busses get better performance + aligned on 32-bit boundaries. */ +#define BIGGEST_ALIGNMENT (TARGET_ALIGN_INT ? 32 : 16) + +#define STRICT_ALIGNMENT (TARGET_STRICT_ALIGNMENT) +#define M68K_HONOR_TARGET_STRICT_ALIGNMENT 1 + +#define DWARF_CIE_DATA_ALIGNMENT -2 + +#define INT_TYPE_SIZE (TARGET_SHORT ? 16 : 32) + +/* Define these to avoid dependence on meaning of `int'. */ +#define WCHAR_TYPE "long int" +#define WCHAR_TYPE_SIZE 32 + +/* Maximum number of library IDs we permit with -mid-shared-library. */ +#define MAX_LIBRARY_ID 255 + + +/* Standard register usage. */ + +/* For the m68k, we give the data registers numbers 0-7, + the address registers numbers 010-017 (8-15), + and the 68881 floating point registers numbers 020-027 (16-23). + We also have a fake `arg-pointer' register 030 (24) used for + register elimination. */ +#define FIRST_PSEUDO_REGISTER 25 + +/* All m68k targets (except AmigaOS) use %a5 as the PIC register */ +#define PIC_OFFSET_TABLE_REGNUM \ + (!flag_pic ? INVALID_REGNUM \ + : reload_completed ? REGNO (pic_offset_table_rtx) \ + : PIC_REG) + +/* 1 for registers that have pervasive standard uses + and are not available for the register allocator. + On the m68k, only the stack pointer is such. + Our fake arg-pointer is obviously fixed as well. */ +#define FIXED_REGISTERS \ + {/* Data registers. */ \ + 0, 0, 0, 0, 0, 0, 0, 0, \ + \ + /* Address registers. */ \ + 0, 0, 0, 0, 0, 0, 0, 1, \ + \ + /* Floating point registers \ + (if available). */ \ + 0, 0, 0, 0, 0, 0, 0, 0, \ + \ + /* Arg pointer. */ \ + 1 } + +/* 1 for registers not available across function calls. + These must include the FIXED_REGISTERS and also any + registers that can be used without being saved. + The latter must include the registers where values are returned + and the register where structure-value addresses are passed. + Aside from that, you can include as many other registers as you like. */ +#define CALL_USED_REGISTERS \ + {/* Data registers. */ \ + 1, 1, 0, 0, 0, 0, 0, 0, \ + \ + /* Address registers. */ \ + 1, 1, 0, 0, 0, 0, 0, 1, \ + \ + /* Floating point registers \ + (if available). */ \ + 1, 1, 0, 0, 0, 0, 0, 0, \ + \ + /* Arg pointer. */ \ + 1 } + +#define REG_ALLOC_ORDER \ +{ /* d0/d1/a0/a1 */ \ + 0, 1, 8, 9, \ + /* d2-d7 */ \ + 2, 3, 4, 5, 6, 7, \ + /* a2-a7/arg */ \ + 10, 11, 12, 13, 14, 15, 24, \ + /* fp0-fp7 */ \ + 16, 17, 18, 19, 20, 21, 22, 23\ +} + + +/* On the m68k, ordinary registers hold 32 bits worth; + for the 68881 registers, a single register is always enough for + anything that can be stored in them at all. */ +#define HARD_REGNO_NREGS(REGNO, MODE) \ + ((REGNO) >= 16 ? GET_MODE_NUNITS (MODE) \ + : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) + +/* A C expression that is nonzero if hard register NEW_REG can be + considered for use as a rename register for OLD_REG register. */ + +#define HARD_REGNO_RENAME_OK(OLD_REG, NEW_REG) \ + m68k_hard_regno_rename_ok (OLD_REG, NEW_REG) + +#define HARD_REGNO_MODE_OK(REGNO, MODE) \ + m68k_regno_mode_ok ((REGNO), (MODE)) + +#define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ + m68k_secondary_reload_class (CLASS, MODE, X) + +#define MODES_TIEABLE_P(MODE1, MODE2) \ + (! TARGET_HARD_FLOAT \ + || ((GET_MODE_CLASS (MODE1) == MODE_FLOAT \ + || GET_MODE_CLASS (MODE1) == MODE_COMPLEX_FLOAT) \ + == (GET_MODE_CLASS (MODE2) == MODE_FLOAT \ + || GET_MODE_CLASS (MODE2) == MODE_COMPLEX_FLOAT))) + +/* Specify the registers used for certain standard purposes. + The values of these macros are register numbers. */ + +#define STACK_POINTER_REGNUM SP_REG + +/* Most m68k targets use %a6 as a frame pointer. The AmigaOS + ABI uses %a6 for shared library calls, therefore the frame + pointer is shifted to %a5 on this target. */ +#define FRAME_POINTER_REGNUM A6_REG + +/* Base register for access to arguments of the function. + * This isn't a hardware register. It will be eliminated to the + * stack pointer or frame pointer. + */ +#define ARG_POINTER_REGNUM 24 + +#define STATIC_CHAIN_REGNUM A0_REG +#define M68K_STATIC_CHAIN_REG_NAME REGISTER_PREFIX "a0" + +/* Register in which address to store a structure value + is passed to a function. */ +#define M68K_STRUCT_VALUE_REGNUM A1_REG + + + +/* The m68k has three kinds of registers, so eight classes would be + a complete set. One of them is not needed. */ +enum reg_class { + NO_REGS, DATA_REGS, + ADDR_REGS, FP_REGS, + GENERAL_REGS, DATA_OR_FP_REGS, + ADDR_OR_FP_REGS, ALL_REGS, + LIM_REG_CLASSES }; + +#define N_REG_CLASSES (int) LIM_REG_CLASSES + +#define REG_CLASS_NAMES \ + { "NO_REGS", "DATA_REGS", \ + "ADDR_REGS", "FP_REGS", \ + "GENERAL_REGS", "DATA_OR_FP_REGS", \ + "ADDR_OR_FP_REGS", "ALL_REGS" } + +#define REG_CLASS_CONTENTS \ +{ \ + {0x00000000}, /* NO_REGS */ \ + {0x000000ff}, /* DATA_REGS */ \ + {0x0100ff00}, /* ADDR_REGS */ \ + {0x00ff0000}, /* FP_REGS */ \ + {0x0100ffff}, /* GENERAL_REGS */ \ + {0x00ff00ff}, /* DATA_OR_FP_REGS */ \ + {0x01ffff00}, /* ADDR_OR_FP_REGS */ \ + {0x01ffffff}, /* ALL_REGS */ \ +} + +extern enum reg_class regno_reg_class[]; +#define REGNO_REG_CLASS(REGNO) (regno_reg_class[(REGNO)]) +#define INDEX_REG_CLASS GENERAL_REGS +#define BASE_REG_CLASS ADDR_REGS + +#define PREFERRED_RELOAD_CLASS(X,CLASS) \ + m68k_preferred_reload_class (X, CLASS) + +/* On the m68k, this is the size of MODE in words, + except in the FP regs, where a single reg is always enough. */ +#define CLASS_MAX_NREGS(CLASS, MODE) \ + ((CLASS) == FP_REGS ? 1 \ + : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) + +/* Moves between fp regs and other regs are two insns. */ +#define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) \ + ((((CLASS1) == FP_REGS) != ((CLASS2) == FP_REGS)) ? 4 : 2) + +#define IRA_COVER_CLASSES \ +{ \ + ALL_REGS, LIM_REG_CLASSES \ +} + +/* Stack layout; function entry, exit and calling. */ + +#define STACK_GROWS_DOWNWARD 1 +#define FRAME_GROWS_DOWNWARD 1 +#define STARTING_FRAME_OFFSET 0 + +/* On the 680x0, sp@- in a byte insn really pushes a word. + On the ColdFire, sp@- in a byte insn pushes just a byte. */ +#define PUSH_ROUNDING(BYTES) (TARGET_COLDFIRE ? BYTES : ((BYTES) + 1) & ~1) + +#define FIRST_PARM_OFFSET(FNDECL) 8 + +/* On the m68k the return value defaults to D0. */ +#define FUNCTION_VALUE(VALTYPE, FUNC) \ + gen_rtx_REG (TYPE_MODE (VALTYPE), D0_REG) + +/* On the m68k the return value defaults to D0. */ +#define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, D0_REG) + +/* On the m68k, D0 is usually the only register used. */ +#define FUNCTION_VALUE_REGNO_P(N) ((N) == D0_REG) + +/* Define this to be true when FUNCTION_VALUE_REGNO_P is true for + more than one register. + XXX This macro is m68k specific and used only for m68kemb.h. */ +#define NEEDS_UNTYPED_CALL 0 + +/* On the m68k, all arguments are usually pushed on the stack. */ +#define FUNCTION_ARG_REGNO_P(N) 0 + +/* On the m68k, this is a single integer, which is a number of bytes + of arguments scanned so far. */ +#define CUMULATIVE_ARGS int + +/* On the m68k, the offset starts at 0. */ +#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ + ((CUM) = 0) + +#define FUNCTION_PROFILER(FILE, LABELNO) \ + asm_fprintf (FILE, "\tlea %LLP%d,%Ra0\n\tjsr mcount\n", (LABELNO)) + +#define EXIT_IGNORE_STACK 1 + +/* Output assembler code for a block containing the constant parts + of a trampoline, leaving space for the variable parts. + + On the m68k, the trampoline looks like this: + movl #STATIC,a0 + jmp FUNCTION + + WARNING: Targets that may run on 68040+ cpus must arrange for + the instruction cache to be flushed. Previous incarnations of + the m68k trampoline code attempted to get around this by either + using an out-of-line transfer function or pc-relative data, but + the fact remains that the code to jump to the transfer function + or the code to load the pc-relative data needs to be flushed + just as much as the "variable" portion of the trampoline. + Recognizing that a cache flush is going to be required anyway, + dispense with such notions and build a smaller trampoline. + + Since more instructions are required to move a template into + place than to create it on the spot, don't use a template. */ + +#define TRAMPOLINE_SIZE 12 +#define TRAMPOLINE_ALIGNMENT 16 + +/* Targets redefine this to invoke code to either flush the cache, + or enable stack execution (or both). */ +#ifndef FINALIZE_TRAMPOLINE +#define FINALIZE_TRAMPOLINE(TRAMP) +#endif + +/* This is the library routine that is used to transfer control from the + trampoline to the actual nested function. It is defined for backward + compatibility, for linking with object code that used the old trampoline + definition. + + A colon is used with no explicit operands to cause the template string + to be scanned for %-constructs. + + The function name __transfer_from_trampoline is not actually used. + The function definition just permits use of "asm with operands" + (though the operand list is empty). */ +#define TRANSFER_FROM_TRAMPOLINE \ +void \ +__transfer_from_trampoline () \ +{ \ + register char *a0 asm (M68K_STATIC_CHAIN_REG_NAME); \ + asm (GLOBAL_ASM_OP "___trampoline"); \ + asm ("___trampoline:"); \ + asm volatile ("move%.l %0,%@" : : "m" (a0[22])); \ + asm volatile ("move%.l %1,%0" : "=a" (a0) : "m" (a0[18])); \ + asm ("rts":); \ +} + +/* There are two registers that can always be eliminated on the m68k. + The frame pointer and the arg pointer can be replaced by either the + hard frame pointer or to the stack pointer, depending upon the + circumstances. The hard frame pointer is not used before reload and + so it is not eligible for elimination. */ +#define ELIMINABLE_REGS \ +{{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ + { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }, \ + { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }} + +#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ + (OFFSET) = m68k_initial_elimination_offset(FROM, TO) + +/* Addressing modes, and classification of registers for them. */ + +#define HAVE_POST_INCREMENT 1 +#define HAVE_PRE_DECREMENT 1 + +/* Macros to check register numbers against specific register classes. */ + +/* True for data registers, D0 through D7. */ +#define DATA_REGNO_P(REGNO) IN_RANGE (REGNO, 0, 7) + +/* True for address registers, A0 through A7. */ +#define ADDRESS_REGNO_P(REGNO) IN_RANGE (REGNO, 8, 15) + +/* True for integer registers, D0 through D7 and A0 through A7. */ +#define INT_REGNO_P(REGNO) IN_RANGE (REGNO, 0, 15) + +/* True for floating point registers, FP0 through FP7. */ +#define FP_REGNO_P(REGNO) IN_RANGE (REGNO, 16, 23) + +#define REGNO_OK_FOR_INDEX_P(REGNO) \ + (INT_REGNO_P (REGNO) \ + || INT_REGNO_P (reg_renumber[REGNO])) + +#define REGNO_OK_FOR_BASE_P(REGNO) \ + (ADDRESS_REGNO_P (REGNO) \ + || ADDRESS_REGNO_P (reg_renumber[REGNO])) + +#define REGNO_OK_FOR_INDEX_NONSTRICT_P(REGNO) \ + (INT_REGNO_P (REGNO) \ + || REGNO == ARG_POINTER_REGNUM \ + || REGNO >= FIRST_PSEUDO_REGISTER) + +#define REGNO_OK_FOR_BASE_NONSTRICT_P(REGNO) \ + (ADDRESS_REGNO_P (REGNO) \ + || REGNO == ARG_POINTER_REGNUM \ + || REGNO >= FIRST_PSEUDO_REGISTER) + +/* Now macros that check whether X is a register and also, + strictly, whether it is in a specified class. + + These macros are specific to the m68k, and may be used only + in code for printing assembler insns and in conditions for + define_optimization. */ + +/* 1 if X is a data register. */ +#define DATA_REG_P(X) (REG_P (X) && DATA_REGNO_P (REGNO (X))) + +/* 1 if X is an fp register. */ +#define FP_REG_P(X) (REG_P (X) && FP_REGNO_P (REGNO (X))) + +/* 1 if X is an address register */ +#define ADDRESS_REG_P(X) (REG_P (X) && ADDRESS_REGNO_P (REGNO (X))) + +/* True if SYMBOL + OFFSET constants must refer to something within + SYMBOL's section. */ +#ifndef M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P +#define M68K_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 0 +#endif + +#define MAX_REGS_PER_ADDRESS 2 + +#define CONSTANT_ADDRESS_P(X) \ + ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ + || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST \ + || GET_CODE (X) == HIGH) \ + && LEGITIMATE_CONSTANT_P (X)) + +/* Nonzero if the constant value X is a legitimate general operand. + It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */ +#define LEGITIMATE_CONSTANT_P(X) \ + (GET_MODE (X) != XFmode \ + && !m68k_illegitimate_symbolic_constant_p (X)) + +#ifndef REG_OK_STRICT +#define REG_STRICT_P 0 +#else +#define REG_STRICT_P 1 +#endif + +#define LEGITIMATE_PIC_OPERAND_P(X) \ + (!symbolic_operand (X, VOIDmode) \ + || (TARGET_PCREL && REG_STRICT_P) \ + || m68k_tls_reference_p (X, true)) + +#define REG_OK_FOR_BASE_P(X) \ + m68k_legitimate_base_reg_p (X, REG_STRICT_P) + +#define REG_OK_FOR_INDEX_P(X) \ + m68k_legitimate_index_reg_p (X, REG_STRICT_P) + + +/* This address is OK as it stands. */ +#define PIC_CASE_VECTOR_ADDRESS(index) index +#define CASE_VECTOR_MODE HImode +#define CASE_VECTOR_PC_RELATIVE 1 + +#define DEFAULT_SIGNED_CHAR 1 +#define MOVE_MAX 4 +#define SLOW_BYTE_ACCESS 0 + +#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 + +/* The ColdFire FF1 instruction returns 32 for zero. */ +#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) + +#define STORE_FLAG_VALUE (-1) + +#define Pmode SImode +#define FUNCTION_MODE QImode + + +/* Tell final.c how to eliminate redundant test instructions. */ + +/* Here we define machine-dependent flags and fields in cc_status + (see `conditions.h'). */ + +/* Set if the cc value is actually in the 68881, so a floating point + conditional branch must be output. */ +#define CC_IN_68881 04000 + +/* On the 68000, all the insns to store in an address register fail to + set the cc's. However, in some cases these instructions can make it + possibly invalid to use the saved cc's. In those cases we clear out + some or all of the saved cc's so they won't be used. */ +#define NOTICE_UPDATE_CC(EXP,INSN) notice_update_cc (EXP, INSN) + +/* The shift instructions always clear the overflow bit. */ +#define CC_OVERFLOW_UNUSABLE 01000 + +/* The shift instructions use the carry bit in a way not compatible with + conditional branches. conditions.h uses CC_NO_OVERFLOW for this purpose. + Rename it to something more understandable. */ +#define CC_NO_CARRY CC_NO_OVERFLOW + +#define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \ +do { if (cc_prev_status.flags & CC_IN_68881) \ + return FLOAT; \ + if (cc_prev_status.flags & CC_NO_OVERFLOW) \ + return NO_OV; \ + return NORMAL; } while (0) + +/* Control the assembler format that we output. */ + +#define ASM_APP_ON "#APP\n" +#define ASM_APP_OFF "#NO_APP\n" +#define TEXT_SECTION_ASM_OP "\t.text" +#define DATA_SECTION_ASM_OP "\t.data" +#define GLOBAL_ASM_OP "\t.globl\t" +#define REGISTER_PREFIX "" +#define LOCAL_LABEL_PREFIX "" +#define USER_LABEL_PREFIX "_" +#define IMMEDIATE_PREFIX "#" + +#define REGISTER_NAMES \ +{REGISTER_PREFIX"d0", REGISTER_PREFIX"d1", REGISTER_PREFIX"d2", \ + REGISTER_PREFIX"d3", REGISTER_PREFIX"d4", REGISTER_PREFIX"d5", \ + REGISTER_PREFIX"d6", REGISTER_PREFIX"d7", \ + REGISTER_PREFIX"a0", REGISTER_PREFIX"a1", REGISTER_PREFIX"a2", \ + REGISTER_PREFIX"a3", REGISTER_PREFIX"a4", REGISTER_PREFIX"a5", \ + REGISTER_PREFIX"a6", REGISTER_PREFIX"sp", \ + REGISTER_PREFIX"fp0", REGISTER_PREFIX"fp1", REGISTER_PREFIX"fp2", \ + REGISTER_PREFIX"fp3", REGISTER_PREFIX"fp4", REGISTER_PREFIX"fp5", \ + REGISTER_PREFIX"fp6", REGISTER_PREFIX"fp7", REGISTER_PREFIX"argptr" } + +#define M68K_FP_REG_NAME REGISTER_PREFIX"fp" + +/* Return a register name by index, handling %fp nicely. + We don't replace %fp for targets that don't map it to %a6 + since it may confuse GAS. */ +#define M68K_REGNAME(r) ( \ + ((FRAME_POINTER_REGNUM == A6_REG) \ + && ((r) == FRAME_POINTER_REGNUM) \ + && frame_pointer_needed) ? \ + M68K_FP_REG_NAME : reg_names[(r)]) + +/* On the Sun-3, the floating point registers have numbers + 18 to 25, not 16 to 23 as they do in the compiler. */ +#define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 16 ? (REGNO) : (REGNO) + 2) + +/* Before the prologue, RA is at 0(%sp). */ +#define INCOMING_RETURN_ADDR_RTX \ + gen_rtx_MEM (VOIDmode, gen_rtx_REG (VOIDmode, STACK_POINTER_REGNUM)) + +/* After the prologue, RA is at 4(AP) in the current frame. */ +#define RETURN_ADDR_RTX(COUNT, FRAME) \ + ((COUNT) == 0 \ + ? gen_rtx_MEM (Pmode, plus_constant (arg_pointer_rtx, UNITS_PER_WORD)) \ + : gen_rtx_MEM (Pmode, plus_constant (FRAME, UNITS_PER_WORD))) + +/* We must not use the DBX register numbers for the DWARF 2 CFA column + numbers because that maps to numbers beyond FIRST_PSEUDO_REGISTER. + Instead use the identity mapping. */ +#define DWARF_FRAME_REGNUM(REG) \ + (INT_REGNO_P (REG) || FP_REGNO_P (REG) ? (REG) : INVALID_REGNUM) + +/* The return column was originally 24, but gcc used 25 for a while too. + Define both registers 24 and 25 as Pmode ones and use 24 in our own + unwind information. */ +#define DWARF_FRAME_REGISTERS 25 +#define DWARF_FRAME_RETURN_COLUMN 24 +#define DWARF_ALT_FRAME_RETURN_COLUMN 25 + +/* Before the prologue, the top of the frame is at 4(%sp). */ +#define INCOMING_FRAME_SP_OFFSET 4 + +/* All registers are live on exit from an interrupt routine. */ +#define EPILOGUE_USES(REGNO) \ + (reload_completed \ + && (m68k_get_function_kind (current_function_decl) \ + == m68k_fk_interrupt_handler)) + +/* Describe how we implement __builtin_eh_return. */ +#define EH_RETURN_DATA_REGNO(N) \ + ((N) < 2 ? (N) : INVALID_REGNUM) +#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, A0_REG) +#define EH_RETURN_HANDLER_RTX \ + gen_rtx_MEM (Pmode, \ + gen_rtx_PLUS (Pmode, arg_pointer_rtx, \ + plus_constant (EH_RETURN_STACKADJ_RTX, \ + UNITS_PER_WORD))) + +/* Select a format to encode pointers in exception handling data. CODE + is 0 for data, 1 for code labels, 2 for function pointers. GLOBAL is + true if the symbol may be affected by dynamic relocations. + + TARGET_ID_SHARED_LIBRARY and TARGET_SEP_DATA are designed to support + a read-only text segment without imposing a fixed gap between the + text and data segments. As a result, the text segment cannot refer + to anything in the data segment, even in PC-relative form. Because + .eh_frame refers to both code and data, it follows that .eh_frame + must be in the data segment itself, and that the offset between + .eh_frame and code will not be a link-time constant. + + In theory, we could create a read-only .eh_frame by using DW_EH_PE_pcrel + | DW_EH_PE_indirect for all code references. However, gcc currently + handles indirect references using a per-TU constant pool. This means + that if a function and its eh_frame are removed by the linker, the + eh_frame's indirect references to the removed function will not be + removed, leading to an unresolved symbol error. + + It isn't clear that any -msep-data or -mid-shared-library target + would benefit from a read-only .eh_frame anyway. In particular, + no known target that supports these options has a feature like + PT_GNU_RELRO. Without any such feature to motivate them, indirect + references would be unnecessary bloat, so we simply use an absolute + pointer for code and global references. We still use pc-relative + references to data, as this avoids a relocation. */ +#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ + (flag_pic \ + && !((TARGET_ID_SHARED_LIBRARY || TARGET_SEP_DATA) \ + && ((GLOBAL) || (CODE))) \ + ? ((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4 \ + : DW_EH_PE_absptr) + +#define ASM_OUTPUT_LABELREF(FILE,NAME) \ + asm_fprintf (FILE, "%U%s", NAME) + +#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ + sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long)(NUM)) + +#define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ + asm_fprintf (FILE, (MOTOROLA \ + ? "\tmove.l %s,-(%Rsp)\n" \ + : "\tmovel %s,%Rsp@-\n"), \ + reg_names[REGNO]) + +#define ASM_OUTPUT_REG_POP(FILE,REGNO) \ + asm_fprintf (FILE, (MOTOROLA \ + ? "\tmove.l (%Rsp)+,%s\n" \ + : "\tmovel %Rsp@+,%s\n"), \ + reg_names[REGNO]) + +/* The m68k does not use absolute case-vectors, but we must define this macro + anyway. */ +#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ + asm_fprintf (FILE, "\t.long %LL%d\n", VALUE) + +#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ + asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL) + +/* We don't have a way to align to more than a two-byte boundary, so do the + best we can and don't complain. */ +#define ASM_OUTPUT_ALIGN(FILE,LOG) \ + if ((LOG) >= 1) \ + fprintf (FILE, "\t.even\n"); + +#ifdef HAVE_GAS_BALIGN_AND_P2ALIGN +/* Use "move.l %a4,%a4" to advance within code. */ +#define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \ + if ((LOG) > 0) \ + fprintf ((FILE), "\t.balignw %u,0x284c\n", 1 << (LOG)); +#endif + +#define ASM_OUTPUT_SKIP(FILE,SIZE) \ + fprintf (FILE, "\t.skip %u\n", (int)(SIZE)) + +#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ +( fputs (".comm ", (FILE)), \ + assemble_name ((FILE), (NAME)), \ + fprintf ((FILE), ",%u\n", (int)(ROUNDED))) + +#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ +( fputs (".lcomm ", (FILE)), \ + assemble_name ((FILE), (NAME)), \ + fprintf ((FILE), ",%u\n", (int)(ROUNDED))) + +#define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \ + m68k_final_prescan_insn (INSN, OPVEC, NOPERANDS) + +/* On the 68000, we use several CODE characters: + '.' for dot needed in Motorola-style opcode names. + '-' for an operand pushing on the stack: + sp@-, -(sp) or -(%sp) depending on the style of syntax. + '+' for an operand pushing on the stack: + sp@+, (sp)+ or (%sp)+ depending on the style of syntax. + '@' for a reference to the top word on the stack: + sp@, (sp) or (%sp) depending on the style of syntax. + '#' for an immediate operand prefix (# in MIT and Motorola syntax + but & in SGS syntax). + '!' for the fpcr register (used in some float-to-fixed conversions). + '$' for the letter `s' in an op code, but only on the 68040. + '&' for the letter `d' in an op code, but only on the 68040. + '/' for register prefix needed by longlong.h. + '?' for m68k_library_id_string + + 'b' for byte insn (no effect, on the Sun; this is for the ISI). + 'd' to force memory addressing to be absolute, not relative. + 'f' for float insn (print a CONST_DOUBLE as a float rather than in hex) + 'x' for float insn (print a CONST_DOUBLE as a float rather than in hex), + or print pair of registers as rx:ry. */ + +#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ + ((CODE) == '.' || (CODE) == '#' || (CODE) == '-' \ + || (CODE) == '+' || (CODE) == '@' || (CODE) == '!' \ + || (CODE) == '$' || (CODE) == '&' || (CODE) == '/' || (CODE) == '?') + + +/* See m68k.c for the m68k specific codes. */ +#define PRINT_OPERAND(FILE, X, CODE) print_operand (FILE, X, CODE) + +#define PRINT_OPERAND_ADDRESS(FILE, ADDR) print_operand_address (FILE, ADDR) + +#define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \ +do { \ + if (! m68k_output_addr_const_extra (FILE, (X))) \ + goto FAIL; \ +} while (0); + +/* Values used in the MICROARCH argument to M68K_DEVICE. */ +enum uarch_type +{ + u68000, + u68010, + u68020, + u68020_40, + u68020_60, + u68030, + u68040, + u68060, + ucpu32, + ucfv1, + ucfv2, + ucfv3, + ucfv4, + ucfv4e, + ucfv5, + unk_arch +}; + +/* An enumeration of all supported target devices. */ +enum target_device +{ +#define M68K_DEVICE(NAME,ENUM_VALUE,FAMILY,MULTILIB,MICROARCH,ISA,FLAGS) \ + ENUM_VALUE, +#include "m68k-devices.def" +#undef M68K_DEVICE + unk_device +}; + +enum fpu_type +{ + FPUTYPE_NONE, + FPUTYPE_68881, + FPUTYPE_COLDFIRE +}; + +enum m68k_function_kind +{ + m68k_fk_normal_function, + m68k_fk_interrupt_handler, + m68k_fk_interrupt_thread +}; + +/* Variables in m68k.c; see there for details. */ +extern const char *m68k_library_id_string; +extern enum target_device m68k_cpu; +extern enum uarch_type m68k_tune; +extern enum fpu_type m68k_fpu; +extern unsigned int m68k_cpu_flags; +extern unsigned int m68k_tune_flags; +extern const char *m68k_symbolic_call; +extern const char *m68k_symbolic_jump; + +enum M68K_SYMBOLIC_CALL { M68K_SYMBOLIC_CALL_NONE, M68K_SYMBOLIC_CALL_JSR, + M68K_SYMBOLIC_CALL_BSR_C, M68K_SYMBOLIC_CALL_BSR_P }; + +extern enum M68K_SYMBOLIC_CALL m68k_symbolic_call_var; + +/* ??? HOST_WIDE_INT is not being defined for auto-generated files. + Workaround that. */ +#ifdef HOST_WIDE_INT +typedef enum { MOVL, SWAP, NEGW, NOTW, NOTB, MOVQ, MVS, MVZ } + M68K_CONST_METHOD; + +extern M68K_CONST_METHOD m68k_const_method (HOST_WIDE_INT); +#endif + +extern void m68k_emit_move_double (rtx [2]); + +extern int m68k_sched_address_bypass_p (rtx, rtx); +extern int m68k_sched_indexed_address_bypass_p (rtx, rtx); + +#define CPU_UNITS_QUERY 1 |