1 /* Definitions of target machine for GNU compiler. 2 MIPS SDE version. 3 Copyright (C) 2003-2020 Free Software Foundation, Inc. 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 #undef DRIVER_SELF_SPECS 22 #define DRIVER_SELF_SPECS \ 23 /* Set the ISA for the default multilib. */ \ 24 MIPS_DEFAULT_ISA_LEVEL_SPEC, \ 25 \ 26 /* Make sure a -mips option is present. This helps us to pick \ 27 the right multilib, and also makes the later specs easier \ 28 to write. */ \ 29 MIPS_ISA_LEVEL_SPEC, \ 30 \ 31 /* Infer the default float setting from -march. */ \ 32 MIPS_ARCH_FLOAT_SPEC, \ 33 \ 34 /* If no ABI option is specified, infer one from the ISA level \ 35 or -mgp setting. */ \ 36 "%{!mabi=*: %{" MIPS_32BIT_OPTION_SPEC ": -mabi=32;: -mabi=n32}}", \ 37 \ 38 /* Remove a redundant -mfp64 for -mabi=n32; we want the !mfp64 \ 39 multilibs. There's no need to check whether the architecture \ 40 is 64-bit; cc1 will complain if it isn't. */ \ 41 "%{mabi=n32: %<mfp64}", \ 42 \ 43 /* Make sure that an endian option is always present. This makes \ 44 things like LINK_SPEC easier to write. */ \ 45 "%{!EB:%{!EL:%(endian_spec)}}", \ 46 \ 47 /* Configuration-independent MIPS rules. */ \ 48 BASE_DRIVER_SELF_SPECS 49 50 /* Use trap rather than break for all but MIPS I ISA. Force -no-mips16, 51 so that MIPS16 assembler code requires an explicit ".set mips16". 52 Very little hand-written MIPS16 assembler exists, and some build 53 systems expect code to be assembled as non-MIPS16 even if the 54 prevailing compiler flags select -mips16. */ 55 #undef SUBTARGET_ASM_SPEC 56 #define SUBTARGET_ASM_SPEC "\ 57 %{!mips1:--trap} \ 58 %{mips16:-no-mips16}" 59 60 #undef LINK_SPEC 61 #define LINK_SPEC "\ 62 %(endian_spec) \ 63 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \ 64 %{shared} \ 65 %{mabi=n32:-melf32%{EB:b}%{EL:l}tsmipn32} \ 66 %{mabi=64:-melf64%{EB:b}%{EL:l}tsmip} \ 67 %{mabi=32:-melf32%{EB:b}%{EL:l}tsmip}" 68 69 #undef DEFAULT_SIGNED_CHAR 70 #define DEFAULT_SIGNED_CHAR 0 71 72 /* Describe how we implement __builtin_eh_return. */ 73 74 /* At the moment, nothing appears to use more than 2 EH data registers. 75 The chosen registers must not clash with the return register ($2), 76 EH_RETURN_STACKADJ ($3), or MIPS_EPILOGUE_TEMP ($5), and they must 77 be general MIPS16 registers. Pick $6 and $7. */ 78 #undef EH_RETURN_DATA_REGNO 79 #define EH_RETURN_DATA_REGNO(N) \ 80 ((N) < 2 ? 7 - (N) : INVALID_REGNUM) 81 82 /* Use $5 as a temporary for both MIPS16 and non-MIPS16. */ 83 #undef MIPS_EPILOGUE_TEMP_REGNUM 84 #define MIPS_EPILOGUE_TEMP_REGNUM \ 85 (cfun->machine->interrupt_handler_p ? K0_REG_NUM : GP_REG_FIRST + 5) 86 87 /* Using long will always be right for size_t and ptrdiff_t, since 88 sizeof(long) must equal sizeof(void *), following from the setting 89 of the -mlong64 option. */ 90 #undef SIZE_TYPE 91 #define SIZE_TYPE "long unsigned int" 92 #undef PTRDIFF_TYPE 93 #define PTRDIFF_TYPE "long int" 94 95 /* Force all .init and .fini entries to be 32-bit, not mips16, so that 96 in a mixed environment they are all the same mode. The crti.asm and 97 crtn.asm files will also be compiled as 32-bit due to the 98 -no-mips16 flag in SUBTARGET_ASM_SPEC above. */ 99 #undef CRT_CALL_STATIC_FUNCTION 100 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \ 101 asm (SECTION_OP "\n\ 102 .set push\n\ 103 .set nomips16\n\ 104 jal " USER_LABEL_PREFIX #FUNC "\n\ 105 .set pop\n\ 106 " TEXT_SECTION_ASM_OP); 107