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Diffstat (limited to 'gcc/config/i860/sysv4.h')
| -rwxr-xr-x | gcc/config/i860/sysv4.h | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/gcc/config/i860/sysv4.h b/gcc/config/i860/sysv4.h new file mode 100755 index 0000000..eca6b79 --- /dev/null +++ b/gcc/config/i860/sysv4.h @@ -0,0 +1,193 @@ +/* Target definitions for GNU compiler for Intel 80860 running System V.4 + Copyright (C) 1991, 1996 Free Software Foundation, Inc. + Contributed by Ron Guilmette (rfg@monkeys.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, 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#undef TARGET_VERSION +#define TARGET_VERSION fprintf (stderr, " (i860 System V Release 4)"); + +/* Provide a set of pre-definitions and pre-assertions appropriate for + the i860 running svr4. Note that the symbol `__svr4__' MUST BE + DEFINED! It is needed so that the va_list struct in va-i860.h + will get correctly defined for the svr4 (ABI compliant) case rather + than for the previous (svr3, svr2, ...) case. It also needs to be + defined so that the correct (svr4) version of __builtin_saveregs + will be selected when we are building gnulib2.c. + __svr4__ is our extension. */ + +#define CPP_PREDEFINES \ + "-Di860 -Dunix -DSVR4 -D__svr4__ -Asystem(unix) -Asystem(svr4) -Acpu(i860) -Amachine(i860)" + +/* The prefix to be used in assembler output for all names of registers. + This string gets prepended to all i860 register names (svr4 only). */ + +#define I860_REG_PREFIX "%" + +#define ASM_COMMENT_START "#" + +#undef TYPE_OPERAND_FMT +#define TYPE_OPERAND_FMT "\"%s\"" + +#define DBX_REGISTER_NUMBER(REGNO) (REGNO) + +/* The following macro definition overrides the one in i860.h + because the svr4 i860 assembler requires a different syntax + for getting parts of constant/relocatable values. */ + +#undef PRINT_OPERAND_PART +#define PRINT_OPERAND_PART(FILE, X, PART_CODE) \ + do { fprintf (FILE, "["); \ + output_address (X); \ + fprintf (FILE, "]@%s", PART_CODE); \ + } while (0) + +/* If the host and target formats match, output the floats as hex. */ +#if HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT +#if defined (HOST_WORDS_BIG_ENDIAN) == WORDS_BIG_ENDIAN + +/* This is how to output an assembler line defining a `double' constant. + Note that the native i860/svr4 ELF assembler can't properly handle + infinity. It generates an incorrect (non-infinity) value when given + `.double 99e9999' and it doesn't grok `inf' at all. It also mishandles + NaNs and -0.0. */ + +#undef ASM_OUTPUT_DOUBLE +#define ASM_OUTPUT_DOUBLE(FILE,VALUE) \ + { \ + if (REAL_VALUE_ISINF (VALUE) \ + || REAL_VALUE_ISNAN (VALUE) \ + || REAL_VALUE_MINUS_ZERO (VALUE)) \ + { \ + long t[2]; \ + REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \ + fprintf (FILE, "\t.word 0x%lx\n\t.word 0x%lx\n", t[0], t[1]); \ + } \ + else \ + fprintf (FILE, "\t.double %.20e\n", VALUE); \ + } + +/* This is how to output an assembler line defining a `float' constant. + Note that the native i860/svr4 ELF assembler can't properly handle + infinity. It actually generates an assembly time error when given + `.float 99e9999' and it doesn't grok `inf' at all. It also mishandles + NaNs and -0.0. */ + +#undef ASM_OUTPUT_FLOAT +#define ASM_OUTPUT_FLOAT(FILE,VALUE) \ + { \ + if (REAL_VALUE_ISINF (VALUE) \ + || REAL_VALUE_ISNAN (VALUE) \ + || REAL_VALUE_MINUS_ZERO (VALUE)) \ + { \ + long t; \ + REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \ + fprintf (FILE, "\t.word 0x%lx\n", t); \ + } \ + else \ + fprintf (FILE, "\t.float %.12e\n", VALUE); \ + } + +#endif /* word order matches */ +#endif /* HOST_FLOAT_FORMAT == TARGET_FLOAT_FORMAT */ + +#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) + +/* Output the special word the svr4 SDB wants to see just before + the first word of each function's prologue code. */ + +extern char *current_function_original_name; + +/* This special macro is used to output a magic word just before the + first word of each function. On some versions of UNIX running on + the i860, this word can be any word that looks like a NOP, however + under svr4, this neds to be an `shr r0,r0,r0' instruction in which + the normally unused low-order bits contain the length of the function + prologue code (in bytes). This is needed to make the svr4 SDB debugger + happy. */ + +#undef ASM_OUTPUT_FUNCTION_PREFIX +#define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \ + do { ASM_OUTPUT_ALIGN (FILE, 2); \ + fprintf ((FILE), "\t.long\t.ep."); \ + assemble_name (FILE, FNNAME); \ + fprintf (FILE, "-"); \ + assemble_name (FILE, FNNAME); \ + fprintf (FILE, "+0xc8000000\n"); \ + current_function_original_name = (FNNAME); \ + } while (0) + +/* Output the special label that must go just after each function's + prologue code to support svr4 SDB. */ + +#define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \ + do { fprintf (FILE, ".ep."); \ + assemble_name (FILE, current_function_original_name); \ + fprintf (FILE, ":\n"); \ + } while (0) + +/* Define the pseudo-ops used to switch to the .ctors and .dtors sections. + + Note that we want to give these sections the SHF_WRITE attribute + because these sections will actually contain data (i.e. tables of + addresses of functions in the current root executable or shared library + file) and, in the case of a shared library, the relocatable addresses + will have to be properly resolved/relocated (and then written into) by + the dynamic linker when it actually attaches the given shared library + to the executing process. (Note that on SVR4, you may wish to use the + `-z text' option to the ELF linker, when building a shared library, as + an additional check that you are doing everything right. But if you do + use the `-z text' option when building a shared library, you will get + errors unless the .ctors and .dtors sections are marked as writable + via the SHF_WRITE attribute.) */ + +#undef CTORS_SECTION_ASM_OP +#define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\"" +#undef DTORS_SECTION_ASM_OP +#define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\"" + +/* Add definitions to support the .tdesc section as specified in the svr4 + ABI for the i860. */ + +#define TDESC_SECTION_ASM_OP ".section\t.tdesc" + +#undef EXTRA_SECTIONS +#define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc + +#undef EXTRA_SECTION_FUNCTIONS +#define EXTRA_SECTION_FUNCTIONS \ + CONST_SECTION_FUNCTION \ + CTORS_SECTION_FUNCTION \ + DTORS_SECTION_FUNCTION \ + TDESC_SECTION_FUNCTION + +#define TDESC_SECTION_FUNCTION \ +void \ +tdesc_section () \ +{ \ + if (in_section != in_tdesc) \ + { \ + fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \ + in_section = in_tdesc; \ + } \ +} + |