181 lines
6.2 KiB
C
181 lines
6.2 KiB
C
/* Target definitions for GNU compiler for Intel 80860 running System V.4
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Copyright (C) 1991 Free Software Foundation, Inc.
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Written by Ron Guilmette (rfg@ncd.com).
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "i860.h"
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#include "svr4.h"
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (i860 System V Release 4)");
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/* Provide a set of pre-definitions and pre-assertions appropriate for
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the i860 running svr4. Note that the symbol `__SVR4__' MUST BE
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DEFINED! It is needed so that the va_list struct in va-i860.h
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will get correctly defined for the svr4 (ABI compliant) case rather
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than for the previous (svr3, svr2, ...) case. It also needs to be
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defined so that the correct (svr4) version of __builtin_saveregs
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will be selected when we are building gnulib2.c.
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__svr4__ is our extension. */
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#define CPP_PREDEFINES \
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"-Di860 -Dunix -DSVR4 -D__svr4__ -Asystem(unix) -Acpu(i860) -Amachine(i860)"
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/* The prefix to be used in assembler output for all names of registers.
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This string gets prepended to all i860 register names (svr4 only). */
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#define I860_REG_PREFIX "%"
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#define ASM_COMMENT_START "#"
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#undef TYPE_OPERAND_FMT
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#define TYPE_OPERAND_FMT "\"%s\""
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#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
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/* The following macro definition overrides the one in i860.h
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because the svr4 i860 assembler requires a different syntax
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for getting parts of constant/relocatable values. */
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#undef PRINT_OPERAND_PART
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#define PRINT_OPERAND_PART(FILE, X, PART_CODE) \
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do { fprintf (FILE, "["); \
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output_address (X); \
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fprintf (FILE, "]@%s", PART_CODE); \
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} while (0)
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/* If the host and target formats match, output the floats as hex. */
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#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT
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#if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN
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/* This is how to output an assembler line defining a `double' constant.
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Note that the native i860/svr4 ELF assembler can't properly handle
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infinity. It generates an incorrect (non-infinity) value when given
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`.double 99e9999' and it doesn't grok `inf' at all. It also mishandles
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NaNs and -0.0. */
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#undef ASM_OUTPUT_DOUBLE
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#define ASM_OUTPUT_DOUBLE(FILE,VALUE) \
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{ \
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if (REAL_VALUE_ISINF (VALUE) \
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|| REAL_VALUE_ISNAN (VALUE) \
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|| REAL_VALUE_MINUS_ZERO (VALUE)) \
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{ \
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long t[2]; \
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REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \
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fprintf (FILE, "\t.word 0x%lx\n\t.word 0x%lx\n", t[0], t[1]); \
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} \
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else \
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fprintf (FILE, "\t.double %.20g\n", VALUE); \
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}
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/* This is how to output an assembler line defining a `float' constant.
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Note that the native i860/svr4 ELF assembler can't properly handle
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infinity. It actually generates an assembly time error when given
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`.float 99e9999' and it doesn't grok `inf' at all. It also mishandles
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NaNs and -0.0. */
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#undef ASM_OUTPUT_FLOAT
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#define ASM_OUTPUT_FLOAT(FILE,VALUE) \
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{ \
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if (REAL_VALUE_ISINF (VALUE) \
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|| REAL_VALUE_ISNAN (VALUE) \
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|| REAL_VALUE_MINUS_ZERO (VALUE)) \
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{ \
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long t; \
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REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \
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fprintf (FILE, "\t.word 0x%lx\n", t); \
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} \
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else \
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fprintf (FILE, "\t.float %.12g\n", VALUE); \
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}
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#endif /* word order matches */
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#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */
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#undef ASM_FILE_START
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#define ASM_FILE_START(FILE) \
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do { output_file_directive (FILE, main_input_filename); \
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fprintf (FILE, "\t.version\t\"01.01\"\n"); \
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} while (0)
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/* Output the special word the svr4 SDB wants to see just before
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the first word of each function's prologue code. */
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extern char *current_function_original_name;
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/* This special macro is used to output a magic word just before the
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first word of each function. On some versions of UNIX running on
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the i860, this word can be any word that looks like a NOP, however
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under svr4, this neds to be an `shr r0,r0,r0' instruction in which
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the normally unused low-order bits contain the length of the function
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prologue code (in bytes). This is needed to make the svr4 SDB debugger
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happy. */
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#undef ASM_OUTPUT_FUNCTION_PREFIX
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#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \
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do { ASM_OUTPUT_ALIGN (FILE, 2); \
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fprintf ((FILE), "\t.long\t.ep."); \
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assemble_name (FILE, FNNAME); \
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fprintf (FILE, "-"); \
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assemble_name (FILE, FNNAME); \
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fprintf (FILE, "+0xc8000000\n"); \
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current_function_original_name = (FNNAME); \
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} while (0)
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/* Output the special label that must go just after each function's
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prologue code to support svr4 SDB. */
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#define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \
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do { fprintf (FILE, ".ep."); \
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assemble_name (FILE, current_function_original_name); \
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fprintf (FILE, ":\n"); \
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} while (0)
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#undef CTORS_SECTION_ASM_OP
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#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"a\",\"progbits\""
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#undef DTORS_SECTION_ASM_OP
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#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"a\",\"progbits\""
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/* Add definitions to support the .tdesc section as specified in the svr4
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ABI for the i860. */
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#define TDESC_SECTION_ASM_OP ".section\t.tdesc"
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#undef EXTRA_SECTIONS
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#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc
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#undef EXTRA_SECTION_FUNCTIONS
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#define EXTRA_SECTION_FUNCTIONS \
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CONST_SECTION_FUNCTION \
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CTORS_SECTION_FUNCTION \
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DTORS_SECTION_FUNCTION \
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TDESC_SECTION_FUNCTION
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#define TDESC_SECTION_FUNCTION \
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void \
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tdesc_section () \
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{ \
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if (in_section != in_tdesc) \
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{ \
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fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \
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in_section = in_tdesc; \
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} \
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}
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