| /* Definitions of target machine for GNU compiler for m68k targets using |
| assemblers derived from AT&T "SGS" releases. |
| Copyright (C) 1991, 1993, 1996 Free Software Foundation, Inc. |
| Written by Fred Fish (fnf@cygnus.com) |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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 1, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| /* Control assembler-syntax conditionals in m68k.md and conditionals in |
| m68k.h. Note that some systems may also require SGS_SWAP_W and/or |
| SGS_SWITCH_TABLES to be defined as well. */ |
| |
| #define MOTOROLA /* Use Motorola syntax rather than "MIT" */ |
| #define SGS /* Uses SGS assembler */ |
| #define SGS_CMP_ORDER /* Takes cmp operands in reverse order */ |
| |
| #include "m68k/m68k.h" |
| |
| /* SGS specific assembler pseudo ops. */ |
| |
| #define BYTE_ASM_OP ".byte" |
| #define WORD_ASM_OP ".short" |
| #define LONG_ASM_OP ".long" |
| #define SPACE_ASM_OP ".space" |
| #define ALIGN_ASM_OP ".align" |
| #undef GLOBAL_ASM_OP |
| #define GLOBAL_ASM_OP ".global" |
| #define SWBEG_ASM_OP ".swbeg" |
| #define SET_ASM_OP ".set" |
| |
| #define UNALIGNED_SHORT_ASM_OP ".short" /* Used in dwarfout.c */ |
| #define UNALIGNED_INT_ASM_OP ".long" /* Used in dwarfout.c */ |
| |
| #define ASM_PN_FORMAT "%s_%d" /* Format for private names */ |
| |
| /* Here are four prefixes that are used by asm_fprintf to |
| facilitate customization for alternate assembler syntaxes. |
| Machines with no likelihood of an alternate syntax need not |
| define these and need not use asm_fprintf. */ |
| |
| /* The prefix for register names. Note that REGISTER_NAMES |
| is supposed to include this prefix. Also note that this is NOT an |
| fprintf format string, it is a literal string */ |
| |
| #undef REGISTER_PREFIX |
| #define REGISTER_PREFIX "%" |
| |
| /* The prefix for local (compiler generated) labels. |
| These labels will not appear in the symbol table. */ |
| |
| #undef LOCAL_LABEL_PREFIX |
| #define LOCAL_LABEL_PREFIX "." |
| |
| /* The prefix to add to user-visible assembler symbols. */ |
| |
| #undef USER_LABEL_PREFIX |
| #define USER_LABEL_PREFIX "" |
| |
| /* The prefix for immediate operands. */ |
| |
| #undef IMMEDIATE_PREFIX |
| #define IMMEDIATE_PREFIX "&" |
| |
| /* How to refer to registers in assembler output. |
| This sequence is indexed by compiler's hard-register-number. |
| Motorola format uses different register names than defined in m68k.h. |
| We also take this chance to convert 'a6' to 'fp' */ |
| |
| #undef REGISTER_NAMES |
| |
| #ifndef SUPPORT_SUN_FPA |
| |
| #define REGISTER_NAMES \ |
| {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \ |
| "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp", \ |
| "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7" } |
| |
| #else /* SUPPORTED_SUN_FPA */ |
| |
| #define REGISTER_NAMES \ |
| {"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \ |
| "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp", \ |
| "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7", \ |
| "%fpa0", "%fpa1", "%fpa2", "%fpa3", "%fpa4", "%fpa5", "%fpa6","%fpa7", \ |
| "%fpa8", "%fpa9", "%fpa10","%fpa11","%fpa12","%fpa13","%fpa14","%fpa15", \ |
| "%fpa16","%fpa17","%fpa18","%fpa19","%fpa20","%fpa21","%fpa22","%fpa23", \ |
| "%fpa24","%fpa25","%fpa26","%fpa27","%fpa28","%fpa29","%fpa30","%fpa31" } |
| |
| #endif /* defined SUPPORT_SUN_FPA */ |
| |
| /* When using an SGS assembler, modify the name of the artificial label which |
| identifies this file as having been compiled with gcc, and the macro that |
| emits such a label in the assembly output, to use '%' rather than '.' */ |
| |
| #define ASM_IDENTIFY_GCC(FILE) \ |
| { fprintf ((FILE), "%s:\n", "gcc2_compiled%"); } |
| |
| /* This is how to output an assembler line defining an `int' constant. */ |
| /* The SGS assembler doesn't understand ".word". */ |
| |
| #undef ASM_OUTPUT_SHORT |
| #define ASM_OUTPUT_SHORT(FILE,VALUE) \ |
| ( fprintf ((FILE), "\t%s ", WORD_ASM_OP), \ |
| output_addr_const ((FILE), (VALUE)), \ |
| fprintf ((FILE), "\n")) |
| |
| #undef ASM_OUTPUT_LONG_DOUBLE |
| #define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE) \ |
| do { long l[3]; \ |
| REAL_VALUE_TO_TARGET_LONG_DOUBLE (VALUE, l); \ |
| fprintf ((FILE), "\t%s 0x%x,0x%x,0x%x\n", LONG_ASM_OP, \ |
| l[0], l[1], l[2]); \ |
| } while (0) |
| |
| /* This is how to output an assembler line defining a `double' constant. */ |
| |
| #undef ASM_OUTPUT_DOUBLE |
| #define ASM_OUTPUT_DOUBLE(FILE,VALUE) \ |
| do { long l[2]; \ |
| REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l); \ |
| fprintf ((FILE), "\t%s 0x%x,0x%x\n", LONG_ASM_OP, \ |
| l[0], l[1]); \ |
| } while (0) |
| |
| /* This is how to output an assembler line defining a `float' constant. */ |
| |
| #undef ASM_OUTPUT_FLOAT |
| #define ASM_OUTPUT_FLOAT(FILE,VALUE) \ |
| do { long l; \ |
| REAL_VALUE_TO_TARGET_SINGLE (VALUE, l); \ |
| fprintf ((FILE), "\t%s 0x%x\n", LONG_ASM_OP, l); \ |
| } while (0) |
| |
| /* This is how to output an assembler line that says to advance the |
| location counter to a multiple of 2**LOG bytes. */ |
| |
| #undef ASM_OUTPUT_ALIGN |
| #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
| if ((LOG) > 0) \ |
| fprintf ((FILE), "\t%s \t%u\n", ALIGN_ASM_OP, 1 << (LOG)); \ |
| else if ((LOG) > 31) \ |
| abort (); |
| |
| /* The routine used to output null terminated string literals. We cannot |
| use the ".string" pseudo op, because it silently truncates strings to |
| 1023 bytes. There is no "partial string op" which works like ".string" |
| but doesn't append a null byte, so we can't chop the input string up |
| into small pieces and use that. Our only remaining alternative is to |
| output the string one byte at a time. */ |
| |
| #define ASM_OUTPUT_ASCII(FILE,PTR,LEN) \ |
| do { \ |
| register int sp = 0, lp = 0, ch; \ |
| fprintf ((FILE), "\t%s ", BYTE_ASM_OP); \ |
| do { \ |
| ch = (PTR)[sp]; \ |
| if (ch > ' ' && ! (ch & 0x80) && ch != '\\') \ |
| { \ |
| fprintf ((FILE), "'%c", ch); \ |
| } \ |
| else \ |
| { \ |
| fprintf ((FILE), "0x%x", ch); \ |
| } \ |
| if (++sp < (LEN)) \ |
| { \ |
| if ((sp % 10) == 0) \ |
| { \ |
| fprintf ((FILE), "\n\t%s ", BYTE_ASM_OP); \ |
| } \ |
| else \ |
| { \ |
| putc (',', (FILE)); \ |
| } \ |
| } \ |
| } while (sp < (LEN)); \ |
| putc ('\n', (FILE)); \ |
| } while (0) |
| |
| |
| /* SGS based assemblers don't understand #NO_APP and #APP, so just don't |
| bother emitting them. */ |
| |
| #undef ASM_APP_ON |
| #define ASM_APP_ON "" |
| |
| #undef ASM_APP_OFF |
| #define ASM_APP_OFF "" |
| |
| /* When using SGS derived assemblers, change the "MIT" or "MOTOROLA" |
| to "SGS/AT&T" */ |
| |
| #undef TARGET_VERSION |
| #define TARGET_VERSION fprintf (stderr, " (68k, SGS/AT&T syntax)"); |
| |
| /* Use proper assembler syntax for these macros. */ |
| #undef ASM_OUTPUT_REG_PUSH |
| #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \ |
| asm_fprintf (FILE, "\t%Omove.l %s,-(%Rsp)\n", reg_names[REGNO]) |
| |
| #undef ASM_OUTPUT_REG_POP |
| #define ASM_OUTPUT_REG_POP(FILE,REGNO) \ |
| asm_fprintf (FILE, "\t%Omove.l (%Rsp)+,%s\n", reg_names[REGNO]) |
| |
| #undef ASM_OUTPUT_FLOAT_OPERAND |
| #define ASM_OUTPUT_FLOAT_OPERAND(CODE,FILE,VALUE) \ |
| do { long l; \ |
| REAL_VALUE_TO_TARGET_SINGLE (VALUE, l); \ |
| asm_fprintf ((FILE), "%I0x%x", l); \ |
| } while (0) |
| |
| #undef ASM_OUTPUT_DOUBLE_OPERAND |
| #define ASM_OUTPUT_DOUBLE_OPERAND(FILE,VALUE) \ |
| do { long l[2]; \ |
| REAL_VALUE_TO_TARGET_DOUBLE (VALUE, l); \ |
| asm_fprintf ((FILE), "%I0x%x%08x", l[0], l[1]); \ |
| } while (0) |
| |
| /* How to output a block of SIZE zero bytes. Note that the `space' pseudo, |
| when used in the text segment, causes SGS assemblers to output nop insns |
| rather than 0s, so we set ASM_NO_SKIP_IN_TEXT to prevent this. */ |
| |
| #define ASM_NO_SKIP_IN_TEXT 1 |
| |
| #undef ASM_OUTPUT_SKIP |
| #define ASM_OUTPUT_SKIP(FILE,SIZE) \ |
| fprintf (FILE, "\t%s %u\n", SPACE_ASM_OP, (SIZE)) |
| |
| /* Translate Motorola opcodes such as `jbeq' into SGS opcodes such |
| as `beq.w'. |
| Delete the `e' in `move...' and `fmove'. |
| Change `ftst' to `ftest'. |
| Change `fbne' to `fbneq' |
| Change `fsne' to `fsneq' |
| Change `divsl' to `tdivs' (32/32 -> 32r:32q) |
| Change `divul' to `tdivu' (32/32 -> 32r:32q) |
| Optionally change swap to swap.w. |
| */ |
| |
| #ifdef SGS_SWAP_W |
| #define ASM_OUTPUT_OPCODE(FILE, PTR) \ |
| { \ |
| extern int flag_pic; \ |
| if (!strncmp ((PTR), "jbsr", 4)) \ |
| { if (flag_pic) \ |
| fprintf ((FILE), "bsr"); \ |
| else \ |
| fprintf ((FILE), "jsr"); \ |
| (PTR) += 4; } \ |
| else if ((PTR)[0] == 'j' && (PTR)[1] == 'b') \ |
| { ++(PTR); \ |
| while (*(PTR) != ' ') \ |
| { putc (*(PTR), (FILE)); ++(PTR); } \ |
| fprintf ((FILE), ".w"); } \ |
| else if ((PTR)[0] == 's') \ |
| { \ |
| if (!strncmp ((PTR), "swap", 4)) \ |
| { fprintf ((FILE), "swap.w"); (PTR) += 4; } \ |
| } \ |
| /* FMOVE ==> FMOV, (and F%& F%$ translations) */ \ |
| else if ((PTR)[0] == 'f') \ |
| { \ |
| if (!strncmp ((PTR), "fmove", 5)) \ |
| { fprintf ((FILE), "fmov"); (PTR) += 5; } \ |
| else if (!strncmp ((PTR), "ftst", 4)) \ |
| { fprintf ((FILE), "ftest"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "fbne", 4)) \ |
| { fprintf ((FILE), "fbneq"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "fsne", 4)) \ |
| { fprintf ((FILE), "fsneq"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "f%$move", 7)) \ |
| { (PTR) += 7; \ |
| if (TARGET_68040_ONLY) \ |
| fprintf ((FILE), "fsmov"); \ |
| else fprintf ((FILE), "fmov"); } \ |
| else if (!strncmp ((PTR), "f%&move", 7)) \ |
| { (PTR) += 7; \ |
| if (TARGET_68040_ONLY) \ |
| fprintf ((FILE), "fdmov"); \ |
| else fprintf ((FILE), "fmov"); } \ |
| } \ |
| /* MOVE, MOVEA, MOVEQ, MOVEC ==> MOV */ \ |
| else if ((PTR)[0] == 'm' && (PTR)[1] == 'o' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 'e') \ |
| { fprintf ((FILE), "mov"); (PTR) += 4; \ |
| if ((PTR)[0] == 'q' || (PTR)[0] == 'a' \ |
| || (PTR)[0] == 'c') (PTR)++; } \ |
| /* SUB, SUBQ, SUBA, SUBI ==> SUB */ \ |
| else if ((PTR)[0] == 's' && (PTR)[1] == 'u' \ |
| && (PTR)[2] == 'b') \ |
| { fprintf ((FILE), "sub"); (PTR) += 3; \ |
| if ((PTR)[0] == 'q' || (PTR)[0] == 'i' \ |
| || (PTR)[0] == 'a') (PTR)++; } \ |
| /* CMP, CMPA, CMPI, CMPM ==> CMP */ \ |
| else if ((PTR)[0] == 'c' && (PTR)[1] == 'm' \ |
| && (PTR)[2] == 'p') \ |
| { fprintf ((FILE), "cmp"); (PTR) += 3; \ |
| if ((PTR)[0] == 'a' || (PTR)[0] == 'i' \ |
| || (PTR)[0] == 'm') (PTR)++; } \ |
| /* DIVSL ==> TDIVS */ \ |
| else if ((PTR)[0] == 'd' && (PTR)[1] == 'i' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 's' \ |
| && (PTR)[4] == 'l') \ |
| { fprintf ((FILE), "tdivs"); (PTR) += 5; } \ |
| /* DIVUL ==> TDIVU */ \ |
| else if ((PTR)[0] == 'd' && (PTR)[1] == 'i' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 'u' \ |
| && (PTR)[4] == 'l') \ |
| { fprintf ((FILE), "tdivu"); (PTR) += 5; } \ |
| } |
| |
| #else /* not SGS_SWAP_W */ |
| |
| #define ASM_OUTPUT_OPCODE(FILE, PTR) \ |
| { \ |
| extern int flag_pic; \ |
| if (!strncmp ((PTR), "jbsr", 4)) \ |
| { if (flag_pic) \ |
| fprintf ((FILE), "bsr"); \ |
| else \ |
| fprintf ((FILE), "jsr"); \ |
| (PTR) += 4; } \ |
| else if ((PTR)[0] == 'j' && (PTR)[1] == 'b') \ |
| { ++(PTR); \ |
| while (*(PTR) != ' ') \ |
| { putc (*(PTR), (FILE)); ++(PTR); } \ |
| fprintf ((FILE), ".w"); } \ |
| /* FMOVE ==> FMOV, (and F%& F%$ translations) */ \ |
| else if ((PTR)[0] == 'f') \ |
| { \ |
| if (!strncmp ((PTR), "fmove", 5)) \ |
| { fprintf ((FILE), "fmov"); (PTR) += 5; } \ |
| else if (!strncmp ((PTR), "ftst", 4)) \ |
| { fprintf ((FILE), "ftest"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "fbne", 4)) \ |
| { fprintf ((FILE), "fbneq"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "fsne", 4)) \ |
| { fprintf ((FILE), "fsneq"); (PTR) += 4; } \ |
| else if (!strncmp ((PTR), "f%$move", 7)) \ |
| { (PTR) += 7; \ |
| if (TARGET_68040_ONLY) \ |
| fprintf ((FILE), "fsmov"); \ |
| else fprintf ((FILE), "fmov"); } \ |
| else if (!strncmp ((PTR), "f%&move", 7)) \ |
| { (PTR) += 7; \ |
| if (TARGET_68040_ONLY) \ |
| fprintf ((FILE), "fdmov"); \ |
| else fprintf ((FILE), "fmov"); } \ |
| } \ |
| /* MOVE, MOVEA, MOVEQ, MOVEC ==> MOV */ \ |
| else if ((PTR)[0] == 'm' && (PTR)[1] == 'o' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 'e') \ |
| { fprintf ((FILE), "mov"); (PTR) += 4; \ |
| if ((PTR)[0] == 'q' || (PTR)[0] == 'a' \ |
| || (PTR)[0] == 'c') (PTR)++; } \ |
| /* SUB, SUBQ, SUBA, SUBI ==> SUB */ \ |
| else if ((PTR)[0] == 's' && (PTR)[1] == 'u' \ |
| && (PTR)[2] == 'b') \ |
| { fprintf ((FILE), "sub"); (PTR) += 3; \ |
| if ((PTR)[0] == 'q' || (PTR)[0] == 'i' \ |
| || (PTR)[0] == 'a') (PTR)++; } \ |
| /* CMP, CMPA, CMPI, CMPM ==> CMP */ \ |
| else if ((PTR)[0] == 'c' && (PTR)[1] == 'm' \ |
| && (PTR)[2] == 'p') \ |
| { fprintf ((FILE), "cmp"); (PTR) += 3; \ |
| if ((PTR)[0] == 'a' || (PTR)[0] == 'i' \ |
| || (PTR)[0] == 'm') (PTR)++; } \ |
| /* DIVSL ==> TDIVS */ \ |
| else if ((PTR)[0] == 'd' && (PTR)[1] == 'i' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 's' \ |
| && (PTR)[4] == 'l') \ |
| { fprintf ((FILE), "tdivs"); (PTR) += 5; } \ |
| /* DIVUL ==> TDIVU */ \ |
| else if ((PTR)[0] == 'd' && (PTR)[1] == 'i' \ |
| && (PTR)[2] == 'v' && (PTR)[3] == 'u' \ |
| && (PTR)[4] == 'l') \ |
| { fprintf ((FILE), "tdivu"); (PTR) += 5; } \ |
| } |
| |
| #endif /* not SGS_SWAP_W */ |
| |
| /* This macro outputs the label at the start of a switch table. The |
| ".swbeg <N>" is an assembler directive that causes the switch table |
| size to be inserted into the object code so that disassemblers, for |
| example, can identify that it is the start of a switch table. */ |
| |
| #define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ |
| fprintf ((FILE), "\t%s &%d\n", SWBEG_ASM_OP, XVECLEN (PATTERN (TABLE), 1)); |
| |
| #define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,TABLE) \ |
| do { \ |
| ASM_OUTPUT_BEFORE_CASE_LABEL((FILE),(PREFIX),(NUM),(TABLE)); \ |
| ASM_OUTPUT_INTERNAL_LABEL((FILE),(PREFIX),(NUM)); \ |
| } while (0) |
| |
| /* At end of a switch table, define LDnnn iff the symbol LInnn was defined. |
| Some SGS assemblers have a bug such that "Lnnn-LInnn-2.b(pc,d0.l*2)" |
| fails to assemble. Luckily "LDnnn(pc,d0.l*2)" produces the results |
| we want. This difference can be accommodated by making the assembler |
| define such "LDnnn" to be either "Lnnn-LInnn-2.b", "Lnnn", or any other |
| string, as necessary. This is accomplished via the ASM_OUTPUT_CASE_END |
| macro. */ |
| |
| #undef ASM_OUTPUT_CASE_END |
| #define ASM_OUTPUT_CASE_END(FILE,NUM,TABLE) \ |
| { if (switch_table_difference_label_flag) \ |
| asm_fprintf (FILE, "\t%s %LLD%d,%LL%d-%LLI%d-2.b\n",\ |
| SET_ASM_OP, (NUM), (NUM), (NUM)); \ |
| switch_table_difference_label_flag = 0; } |
| |
| extern int switch_table_difference_label_flag; |
| |
| /* This is how to output an element of a case-vector that is relative. */ |
| |
| #undef ASM_OUTPUT_ADDR_DIFF_ELT |
| #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \ |
| asm_fprintf (FILE, "\t%s %LL%d-%LL%d\n", WORD_ASM_OP, VALUE, REL) |
| |
| /* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to |
| keep switch tables in the text section. */ |
| |
| #define JUMP_TABLES_IN_TEXT_SECTION 1 |
| |
| /* Store in OUTPUT a string (made with alloca) containing |
| an assembler-name for a local static variable named NAME. |
| LABELNO is an integer which is different for each call. */ |
| |
| #undef ASM_FORMAT_PRIVATE_NAME |
| #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ |
| ( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10), \ |
| sprintf ((OUTPUT), ASM_PN_FORMAT, (NAME), (LABELNO))) |
| |
