1 /* Definitions of target machine for GNU compiler.
3 Copyright (C) 2003-2021 Free Software Foundation, Inc.
5 This file is part of GCC.
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)
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.
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/>. */
21 #undef DRIVER_SELF_SPECS
22 #define DRIVER_SELF_SPECS \
23 /* Set the ISA for the default multilib. */ \
24 MIPS_DEFAULT_ISA_LEVEL_SPEC, \
26 /* Make sure a -mips option is present. This helps us to pick \
27 the right multilib, and also makes the later specs easier \
29 MIPS_ISA_LEVEL_SPEC, \
31 /* Infer the default float setting from -march. */ \
32 MIPS_ARCH_FLOAT_SPEC, \
34 /* If no ABI option is specified, infer one from the ISA level \
36 "%{!mabi=*: %{" MIPS_32BIT_OPTION_SPEC ": -mabi=32;: -mabi=n32}}", \
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}", \
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)}}", \
47 /* Configuration-independent MIPS rules. */ \
48 BASE_DRIVER_SELF_SPECS
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 "\
63 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
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}"
69 #undef DEFAULT_SIGNED_CHAR
70 #define DEFAULT_SIGNED_CHAR 0
72 /* Describe how we implement __builtin_eh_return. */
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)
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)
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. */
91 #define SIZE_TYPE "long unsigned int"
93 #define PTRDIFF_TYPE "long int"
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) \
104 jal " USER_LABEL_PREFIX #FUNC "\n\
106 " TEXT_SECTION_ASM_OP);