From: Richard Stallman Date: Fri, 24 Jan 1992 05:19:21 +0000 (+0000) Subject: Initial revision X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c062fde6e3b04c77fa0f56af47d491b886802be8;p=gcc.git Initial revision From-SVN: r237 --- diff --git a/gcc/config/i386/sysv4.h b/gcc/config/i386/sysv4.h new file mode 100644 index 00000000000..46a1eaa24d9 --- /dev/null +++ b/gcc/config/i386/sysv4.h @@ -0,0 +1,153 @@ +/* Target definitions for GNU compiler for Intel 80386 running System V.4 + Copyright (C) 1991 Free Software Foundation, Inc. + + Written by Ron Guilmette (rfg@ncd.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 2, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "i386.h" /* Base i386 target machine definitions */ +#include "att386.h" /* Use the i386 AT&T assembler syntax */ +#include "svr4.h" /* Definitions common to all SVR4 targets */ + +#undef TARGET_VERSION +#define TARGET_VERSION fprintf (stderr, " (i386 System V Release 4)"); + +/* By default, target has a 80387. */ + +#define TARGET_DEFAULT 1 + +/* Machines that use the AT&T assembler syntax + also return floating point values in an FP register. */ +/* Define how to find the value returned by a function. + VALTYPE is the data type of the value (as a tree). + If the precise function being called is known, FUNC is its FUNCTION_DECL; + otherwise, FUNC is 0. */ + +#define VALUE_REGNO(MODE) \ + (((MODE) == SFmode || (MODE) == DFmode) ? FIRST_FLOAT_REG : 0) + +/* 1 if N is a possible register number for a function value. */ + +#define FUNCTION_VALUE_REGNO_P(N) ((N) == 0 || (N)== FIRST_FLOAT_REG) + +/* The svr4 ABI for the i386 says that records and unions are returned + in memory. */ + +#undef RETURN_IN_MEMORY +#define RETURN_IN_MEMORY(TYPE) \ + (TREE_CODE (TYPE) == RECORD_TYPE || TREE_CODE(TYPE) == UNION_TYPE) + +/* Define which macros to predefine. __svr4__ is our extension. */ +/* This used to define X86, but james@bigtex.cactus.org says that + is supposed to be defined optionally by user programs--not by default. */ +#define CPP_PREDEFINES \ + "-Di386 -Dunix -D__svr4__ -Asystem(unix) -Acpu(i386) -Amachine(i386)" + +/* Output at beginning of assembler file. */ +/* The .file command should always begin the output. */ + +#undef ASM_FILE_START +#define ASM_FILE_START(FILE) \ + do { \ + output_file_directive (FILE, main_input_filename); \ + fprintf (FILE, "\t.version\t\"01.01\"\n"); \ + } while (0) + +/* Define the register numbers to be used in Dwarf debugging information. + The SVR4 reference port C compiler uses the following register numbers + in its Dwarf output code: + + 0 for %eax (regno = 0) + 1 for %ecx (regno = 2) + 2 for %edx (regno = 1) + 3 for %ebx (regno = 3) + 4 for %esp (regno = 7) + 5 for %ebp (regno = 6) + 6 for %esi (regno = 4) + 7 for %edi (regno = 5) + + 8 for FP_REGS[tos] (regno = 8) + 9 for FP_REGS[tos-1] (regno = 9) + 10 for FP_REGS[tos-2] (regno = 10) + 11 for FP_REGS[tos-3] (regno = 11) + 12 for FP_REGS[tos-4] (regno = 12) + 13 for FP_REGS[tos-5] (regno = 13) + 14 for FP_REGS[tos-6] (regno = 14) + 15 for FP_REGS[tos-7] (regno = 15) +*/ + +#undef DBX_REGISTER_NUMBER +#define DBX_REGISTER_NUMBER(n) \ +((n) == 0 ? 0 \ + : (n) == 1 ? 2 \ + : (n) == 2 ? 1 \ + : (n) == 3 ? 3 \ + : (n) == 4 ? 6 \ + : (n) == 5 ? 7 \ + : (n) == 6 ? 5 \ + : (n) == 7 ? 4 \ + : ((n) >= FIRST_STACK_REG && (n) <= LAST_STACK_REG) ? (n) \ + : (abort (), 0)) + +/* The routine used to output sequences of byte values. We use a special + version of this for most svr4 targets because doing so makes the + generated assembly code more compact (and thus faster to assemble) + as well as more readable. Note that if we find subparts of the + character sequence which end with NUL (and which are shorter than + STRING_LIMIT) we output those using ASM_OUTPUT_LIMITED_STRING. */ + +#undef ASM_OUTPUT_ASCII +#define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ + do \ + { \ + register unsigned char *_ascii_bytes = (unsigned char *) (STR); \ + register unsigned char *limit = _ascii_bytes + (LENGTH); \ + register unsigned bytes_in_chunk = 0; \ + for (; _ascii_bytes < limit; _ascii_bytes++) \ + { \ + register unsigned char *p; \ + if (bytes_in_chunk >= 64) \ + { \ + fputc ('\n', (FILE)); \ + bytes_in_chunk = 0; \ + } \ + for (p = _ascii_bytes; p < limit && *p != '\0'; p++) \ + continue; \ + if (p < limit && (p - _ascii_bytes) <= STRING_LIMIT) \ + { \ + if (bytes_in_chunk > 0) \ + { \ + fputc ('\n', (FILE)); \ + bytes_in_chunk = 0; \ + } \ + ASM_OUTPUT_LIMITED_STRING ((FILE), _ascii_bytes); \ + _ascii_bytes = p; \ + } \ + else \ + { \ + if (bytes_in_chunk == 0) \ + fprintf ((FILE), "\t.byte\t"); \ + else \ + fputc (',', (FILE)); \ + fprintf ((FILE), "0x%02x", *_ascii_bytes); \ + bytes_in_chunk += 5; \ + } \ + } \ + if (bytes_in_chunk > 0) \ + fprintf ((FILE), "\n"); \ + } \ + while (0)