/* Definitions of target machine for GNU compiler. MIPS R4000 version with GOFAST floating point library. Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc. 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. */ #define OBJECT_FORMAT_ELF /* Default to -mips3. */ #define TARGET_DEFAULT MASK_FLOAT64|MASK_64BIT #define MIPS_ISA_DEFAULT 3 /* Until we figure out what MIPS ELF targets normally use, just do stabs in ELF. */ #ifndef PREFERRED_DEBUGGING_TYPE #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG #endif /* US Software GOFAST library support. */ #include "gofast.h" #define INIT_SUBTARGET_OPTABS INIT_GOFAST_OPTABS #include "mips/mips.h" /* This must be done after mips.h, because mips.h defines TARGET_ENDIAN_DEFAULT. */ #undef MULTILIB_DEFAULTS #if TARGET_ENDIAN_DEFAULT == 0 #define MULTILIB_DEFAULTS { "EL", "mips3" } #else #define MULTILIB_DEFAULTS { "EB", "mips3" } #endif #undef CPP_PREDEFINES #define CPP_PREDEFINES "-Dmips -DMIPSEB -DR4000 -D_mips -D_MIPSEB -D_R4000" /* I would rather put this in CPP_PREDEFINES, but the gcc driver doesn't handle -U options in CPP_PREDEFINES. */ #undef SUBTARGET_CPP_SPEC #define SUBTARGET_CPP_SPEC "\ %{!mips1:%{!mips2:-U__mips -D__mips=3 -D__mips64}}" /* Use memcpy, et. al., rather than bcopy. */ #define TARGET_MEM_FUNCTIONS /* Biggest alignment supported by the object file format of this machine. Use this macro to limit the alignment which can be specified using the `__attribute__ ((aligned (N)))' construct. If not defined, the default value is `BIGGEST_ALIGNMENT'. */ #define MAX_OFILE_ALIGNMENT (32768*8) /* We need to use .esize and .etype instead of .size and .type to avoid conflicting with ELF directives. */ #undef PUT_SDB_SIZE #define PUT_SDB_SIZE(a) \ do { \ extern FILE *asm_out_text_file; \ fprintf (asm_out_text_file, "\t.esize\t%d;", (a)); \ } while (0) #undef PUT_SDB_TYPE #define PUT_SDB_TYPE(a) \ do { \ extern FILE *asm_out_text_file; \ fprintf (asm_out_text_file, "\t.etype\t0x%x;", (a)); \ } while (0) /* A C statement to output something to the assembler file to switch to section NAME for object DECL which is either a FUNCTION_DECL, a VAR_DECL or NULL_TREE. Some target formats do not support arbitrary sections. Do not define this macro in such cases. */ #define ASM_OUTPUT_SECTION_NAME(F, DECL, NAME, RELOC) \ do { \ extern FILE *asm_out_text_file; \ if ((DECL) && TREE_CODE (DECL) == FUNCTION_DECL) \ fprintf (asm_out_text_file, "\t.section %s,\"ax\",@progbits\n", (NAME)); \ else if ((DECL) && DECL_READONLY_SECTION (DECL, RELOC)) \ fprintf (F, "\t.section %s,\"a\",@progbits\n", (NAME)); \ else \ fprintf (F, "\t.section %s,\"aw\",@progbits\n", (NAME)); \ } while (0) /* The following macro defines the format used to output the second operand of the .type assembler directive. Different svr4 assemblers expect various different forms for this operand. The one given here is just a default. You may need to override it in your machine- specific tm.h file (depending upon the particulars of your assembler). */ #define TYPE_OPERAND_FMT "@%s" /* Define the strings used for the special svr4 .type and .size directives. These strings generally do not vary from one system running svr4 to another, but if a given system (e.g. m88k running svr) needs to use different pseudo-op names for these, they may be overridden in the file which includes this one. */ #undef TYPE_ASM_OP #undef SIZE_ASM_OP #define TYPE_ASM_OP ".type" #define SIZE_ASM_OP ".size" /* These macros generate the special .type and .size directives which are used to set the corresponding fields of the linker symbol table entries in an ELF object file under SVR4. These macros also output the starting labels for the relevant functions/objects. */ /* Write the extra assembler code needed to declare an object properly. */ #undef ASM_DECLARE_OBJECT_NAME #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ do { \ fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ assemble_name (FILE, NAME); \ putc (',', FILE); \ fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ putc ('\n', FILE); \ size_directive_output = 0; \ if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ { \ size_directive_output = 1; \ fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ assemble_name (FILE, NAME); \ fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ } \ mips_declare_object (FILE, NAME, "", ":\n", 0); \ } while (0) /* Output the size directive for a decl in rest_of_decl_compilation in the case where we did not do so before the initializer. Once we find the error_mark_node, we know that the value of size_directive_output was set by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ #undef ASM_FINISH_DECLARE_OBJECT #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ do { \ char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ && ! AT_END && TOP_LEVEL \ && DECL_INITIAL (DECL) == error_mark_node \ && !size_directive_output) \ { \ size_directive_output = 1; \ fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ assemble_name (FILE, name); \ fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ } \ } while (0) #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ do { fputc ( '\t', FILE); \ assemble_name (FILE, LABEL1); \ fputs ( " = ", FILE); \ assemble_name (FILE, LABEL2); \ fputc ( '\n', FILE); \ } while (0) /* Note about .weak vs. .weakext The mips native assemblers support .weakext, but not .weak. mips-elf gas supports .weak, but not .weakext. mips-elf gas has been changed to support both .weak and .weakext, but until that support is generally available, the 'if' below should serve. */ #define ASM_WEAKEN_LABEL(FILE,NAME) ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,0) #define ASM_OUTPUT_WEAK_ALIAS(FILE,NAME,VALUE) \ do { \ if (TARGET_GAS) \ fputs ("\t.weak\t", FILE); \ else \ fputs ("\t.weakext\t", FILE); \ assemble_name (FILE, NAME); \ if (VALUE) \ { \ fputc (' ', FILE); \ assemble_name (FILE, VALUE); \ } \ fputc ('\n', FILE); \ } while (0)