--- /dev/null
+/* 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)
projects / gcc.git / commitdiff