1/* Target definitions for GNU compiler for Intel 80860 running System V.3 2 Copyright (C) 1991, 1996 Free Software Foundation, Inc. 3 Contributed by Ron Guilmette (rfg@monkeys.com). 4 5This file is part of GNU CC. 6 7GNU CC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU CC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU CC; see the file COPYING. If not, write to 19the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, MA 02111-1307, USA. */ 21 22#undef TARGET_VERSION 23#define TARGET_VERSION fprintf (stderr, " (i860, System V Release 3)") 24 25/* Provide a set of pre-definitions and pre-assertions appropriate for 26 the i860 running svr3. */ 27#define CPP_PREDEFINES "-Di860 -Dunix -D__svr3__ -Asystem(unix) -Asystem(svr3) -Acpu(i860) -Amachine(i860)" 28 29/* Use crt1.o as a startup file and crtn.o as a closing file. */ 30 31#define STARTFILE_SPEC \ 32 "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}" 33 34#define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s" 35 36/* Special flags for the linker. I don't know what they do. */ 37 38#define LINK_SPEC "%{T*} %{z:-lm}" 39 40/* The prefix to be used in assembler output for all names of registers. 41 None is needed in V.3. */ 42 43#define I860_REG_PREFIX "" 44 45/* Delimiter that starts comments in the assembler code. */ 46 47#define ASM_COMMENT_START "//" 48 49/* Don't renumber the regusters for debugger output. */ 50 51#define DBX_REGISTER_NUMBER(REGNO) (REGNO) 52 53/* Output the special word the System V SDB wants to see just before 54 the first word of each function's prologue code. */ 55 56extern char *current_function_original_name; 57 58/* This special macro is used to output a magic word just before the 59 first word of each function. On some versions of UNIX running on 60 the i860, this word can be any word that looks like a NOP, however 61 under svr4, this neds to be an `shr r0,r0,r0' instruction in which 62 the normally unused low-order bits contain the length of the function 63 prologue code (in bytes). This is needed to make the System V SDB 64 debugger happy. */ 65 66#undef ASM_OUTPUT_FUNCTION_PREFIX 67#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \ 68 do { ASM_OUTPUT_ALIGN (FILE, 2); \ 69 fprintf ((FILE), "\t.long\t.ep."); \ 70 assemble_name (FILE, FNNAME); \ 71 fprintf (FILE, "-"); \ 72 assemble_name (FILE, FNNAME); \ 73 fprintf (FILE, "+0xc8000000\n"); \ 74 current_function_original_name = (FNNAME); \ 75 } while (0) 76 77/* Output the special label that must go just after each function's 78 prologue code to support svr4 SDB. */ 79 80#define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \ 81 do { fprintf (FILE, ".ep."); \ 82 assemble_name (FILE, current_function_original_name); \ 83 fprintf (FILE, ":\n"); \ 84 } while (0) 85 86/* This says how to output an assembler line 87 to define a local common symbol. 88 The difference from svr3.h is we don't limit align to 2. */ 89 90#undef ASM_OUTPUT_LOCAL 91#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 92 do { \ 93 int align = exact_log2 (ROUNDED); \ 94 data_section (); \ 95 ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ 96 ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 97 fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \ 98 } while (0) 99 100/* The routine used to output string literals. 101 102#define ASCII_DATA_ASM_OP ".byte" 103 104#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ 105 do \ 106 { \ 107 register unsigned char *str = (unsigned char *) (STR); \ 108 register unsigned char *limit = str + (LENGTH); \ 109 register unsigned bytes_in_chunk = 0; \ 110 for (; str < limit; str++) \ 111 { \ 112 register unsigned ch = *str; \ 113 if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \ 114 { \ 115 if (bytes_in_chunk > 0) \ 116 { \ 117 fprintf ((FILE), "\"\n"); \ 118 bytes_in_chunk = 0; \ 119 } \ 120 fprintf ((FILE), "\t%s\t%d\n", ASM_BYTE_OP, ch); \ 121 } \ 122 else \ 123 { \ 124 if (bytes_in_chunk >= 60) \ 125 { \ 126 fprintf ((FILE), "\"\n"); \ 127 bytes_in_chunk = 0; \ 128 } \ 129 if (bytes_in_chunk == 0) \ 130 fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \ 131 putc (ch, (FILE)); \ 132 bytes_in_chunk++; \ 133 } \ 134 } \ 135 if (bytes_in_chunk > 0) \ 136 fprintf ((FILE), "\"\n"); \ 137 } \ 138 while (0) 139 140 141#undef CTORS_SECTION_ASM_OP 142#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"x\"" 143#undef DTORS_SECTION_ASM_OP 144#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"x\"" 145 146/* Add definitions to support the .tdesc section as specified in the svr4 147 ABI for the i860. */ 148 149#define TDESC_SECTION_ASM_OP ".section\t.tdesc" 150 151#undef EXTRA_SECTIONS 152#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc 153 154#undef EXTRA_SECTION_FUNCTIONS 155#define EXTRA_SECTION_FUNCTIONS \ 156 CONST_SECTION_FUNCTION \ 157 CTORS_SECTION_FUNCTION \ 158 DTORS_SECTION_FUNCTION \ 159 TDESC_SECTION_FUNCTION 160 161#define TDESC_SECTION_FUNCTION \ 162void \ 163tdesc_section () \ 164{ \ 165 if (in_section != in_tdesc) \ 166 { \ 167 fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \ 168 in_section = in_tdesc; \ 169 } \ 170} 171 172/* Enable the `const' section that svr3.h defines how to use. */ 173#undef USE_CONST_SECTION 174#define USE_CONST_SECTION 1 175