1 /* Definitions of target machine GNU compiler. IA64-VMS version. 2 Copyright (C) 2003-2020 Free Software Foundation, Inc. 3 Contributed by Douglas B Rupp (rupp@gnat.com). 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. */ 20 21 #define OBJECT_FORMAT_ELF 22 23 #define SUBTARGET_OS_CPP_BUILTINS() \ 24 do { \ 25 builtin_define ("__IA64"); \ 26 builtin_define ("__IEEE_FLOAT"); \ 27 } while (0) 28 29 /* Need .debug_line info generated from gcc and gas. */ 30 #undef TARGET_DEFAULT 31 #define TARGET_DEFAULT (MASK_DWARF2_ASM | MASK_GNU_AS) 32 33 #undef MAX_OFILE_ALIGNMENT 34 #define MAX_OFILE_ALIGNMENT 524288 /* 8 x 2^16 by DEC Ada Test CD40VRA */ 35 36 /* Widest floating-point type efficiently supported by hardware and OS. */ 37 #undef WIDEST_HARDWARE_FP_SIZE 38 #define WIDEST_HARDWARE_FP_SIZE 64 39 40 /* The structure return address arrives as an "argument" on VMS. */ 41 #undef PCC_STATIC_STRUCT_RETURN 42 43 /* Turn on VMS specific Dwarf2 features. */ 44 #define VMS_DEBUGGING_INFO 1 45 46 #define ASM_OUTPUT_DWARF_VMS_DELTA(FILE,SIZE,LABEL1,LABEL2) \ 47 do { \ 48 fprintf (FILE, "\tdata4.ua\t@slotcount("); \ 49 assemble_name (FILE, LABEL1); \ 50 fprintf (FILE, "-"); \ 51 assemble_name (FILE, LABEL2); \ 52 fprintf (FILE, ")"); \ 53 } while (0) 54 55 #undef STARTFILE_SPEC 56 #define STARTFILE_SPEC "%{!shared:crt0.o%s crtbegin.o%s} \ 57 %{!static:%{shared:crtinitS.o%s crtbeginS.o%s}}" 58 59 #undef ENDFILE_SPEC 60 #define ENDFILE_SPEC "%{!shared:crtend.o%s} %{!static:%{shared:crtendS.o%s}}" 61 62 #define LINK_GCC_C_SEQUENCE_SPEC "%G" 63 64 #undef LINK_SPEC 65 #define LINK_SPEC "%{g0} %{g*:-g} %{map} %{save-temps} %{shared} %{v}" 66 67 #undef LIB_SPEC 68 #define LIB_SPEC "" 69 70 #undef ASM_SPEC 71 #define ASM_SPEC \ 72 "%{mno-gnu-as:-N so -N vms_upcase -W DVLoc_off} %{mconstant-gp:-M const_gp} \ 73 %{mauto-pic:-M no_plabel} %{source-listing:-ahdl=%b.lis}" 74 75 #undef ASM_OUTPUT_EXTERNAL_LIBCALL 76 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \ 77 do { \ 78 (*targetm.asm_out.globalize_label) (FILE, XSTR (FUN, 0)); \ 79 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, XSTR (FUN, 0), "function"); \ 80 } while (0) 81 82 /* Set the function to change the names of the division and modulus 83 functions. */ 84 #undef TARGET_INIT_LIBFUNCS 85 #define TARGET_INIT_LIBFUNCS ia64_vms_init_libfuncs 86 87 #define CTOR_LIST_BEGIN asm (".global\tLIB$INITIALIZE#\n"); \ 88 STATIC func_ptr __CTOR_LIST__[1] \ 89 __attribute__ ((__unused__, section(".ctors"), aligned(sizeof(func_ptr)))) \ 90 = { (func_ptr) (-1) }; 91 92 #undef INIT_SECTION_ASM_OP 93 #define INIT_SECTION_ASM_OP ".section\tLIB$INITIALIZE#,\"a\",@progbits" 94 95 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 96 asm (SECTION_OP "\n\tdata4 @fptr(" #FUNC"#)\n"); \ 97 FORCE_CODE_SECTION_ALIGN \ 98 asm (TEXT_SECTION_ASM_OP); 99 100 #undef FINI_SECTION_ASM_OP 101 102 /* Maybe same as HPUX? Needs to be checked. */ 103 #define JMP_BUF_SIZE (8 * 76) 104 105 #undef SUBTARGET_OPTIMIZATION_OPTIONS 106 #define SUBTARGET_OPTIMIZATION_OPTIONS \ 107 { OPT_LEVELS_ALL, OPT_fmerge_constants, NULL, 0 } 108 109 /* Define this to be nonzero if static stack checking is supported. */ 110 #define STACK_CHECK_STATIC_BUILTIN 1 111 112 /* Minimum amount of stack required to recover from an anticipated stack 113 overflow detection. The default value conveys an estimate of the amount 114 of stack required to propagate an exception. */ 115 #define STACK_CHECK_PROTECT (24 * 1024) 116 117 #undef ASM_OUTPUT_ALIGNED_DECL_COMMON 118 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ 119 ia64_vms_output_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN) 120 121 #undef TARGET_VALID_POINTER_MODE 122 #define TARGET_VALID_POINTER_MODE ia64_vms_valid_pointer_mode 123 124 /* Define this macro if it is advisable to hold scalars in registers 125 in a wider mode than that declared by the program. In such cases, 126 the value is constrained to be within the bounds of the declared 127 type, but kept valid in the wider mode. The signedness of the 128 extension may differ from that of the type. 129 130 For ia64, we always store objects in a full register. 32-bit integers 131 are always sign-extended, but smaller objects retain their signedness. */ 132 133 #undef PROMOTE_MODE 134 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 135 if (GET_MODE_CLASS (MODE) == MODE_INT \ 136 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 137 { \ 138 if ((MODE) == SImode) \ 139 (UNSIGNEDP) = 0; \ 140 (MODE) = DImode; \ 141 } 142 143 #undef TARGET_PROMOTE_FUNCTION_MODE 144 #define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote 145 146 /* Code is always in P0/P1 (lower 32 bit addresses) on VMS. */ 147 #undef CASE_VECTOR_MODE 148 #define CASE_VECTOR_MODE SImode 149 150 /* IA64 VMS doesn't fully support COMDAT sections. */ 151 152 #define SUPPORTS_ONE_ONLY 0 153 154 /* Default values for _CRTL_VER and _VMS_VER. */ 155 #define VMS_DEFAULT_CRTL_VER 80300000 156 #define VMS_DEFAULT_VMS_VER 80300000 157