gcc/config/mips/sde.h

/* Definitions of target machine for GNU compiler.
   MIPS SDE version.
   Copyright (C) 2003-2021 Free Software Foundation, Inc.

This file is part of GCC.

GCC 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 3, or (at your option)
any later version.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#undef DRIVER_SELF_SPECS
#define DRIVER_SELF_SPECS						\
  /* Set the ISA for the default multilib.  */				\
  MIPS_DEFAULT_ISA_LEVEL_SPEC,						\
									\
  /* Make sure a -mips option is present.  This helps us to pick	\
     the right multilib, and also makes the later specs easier		\
     to write.  */							\
  MIPS_ISA_LEVEL_SPEC,							\
									\
  /* Infer the default float setting from -march.  */			\
  MIPS_ARCH_FLOAT_SPEC,							\
									\
  /* If no ABI option is specified, infer one from the ISA level	\
     or -mgp setting.  */						\
  "%{!mabi=*: %{" MIPS_32BIT_OPTION_SPEC ": -mabi=32;: -mabi=n32}}",	\
									\
  /* Remove a redundant -mfp64 for -mabi=n32; we want the !mfp64	\
     multilibs.  There's no need to check whether the architecture	\
     is 64-bit; cc1 will complain if it isn't.  */			\
  "%{mabi=n32: %<mfp64}",						\
									\
  /* Make sure that an endian option is always present.  This makes	\
     things like LINK_SPEC easier to write.  */				\
  "%{!EB:%{!EL:%(endian_spec)}}",					\
									\
  /* Configuration-independent MIPS rules.  */				\
  BASE_DRIVER_SELF_SPECS				

/* Use trap rather than break for all but MIPS I ISA.  Force -no-mips16,
   so that MIPS16 assembler code requires an explicit ".set mips16".
   Very little hand-written MIPS16 assembler exists, and some build
   systems expect code to be assembled as non-MIPS16 even if the
   prevailing compiler flags select -mips16.  */
#undef SUBTARGET_ASM_SPEC
#define SUBTARGET_ASM_SPEC "\
%{!mips1:--trap} \
%{mips16:-no-mips16}"

#undef LINK_SPEC
#define LINK_SPEC "\
%(endian_spec) \
%{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
%{shared} \
%{mabi=n32:-melf32%{EB:b}%{EL:l}tsmipn32} \
%{mabi=64:-melf64%{EB:b}%{EL:l}tsmip} \
%{mabi=32:-melf32%{EB:b}%{EL:l}tsmip}"

#undef DEFAULT_SIGNED_CHAR
#define DEFAULT_SIGNED_CHAR 0

/* Describe how we implement __builtin_eh_return.  */

/* At the moment, nothing appears to use more than 2 EH data registers.
   The chosen registers must not clash with the return register ($2),
   EH_RETURN_STACKADJ ($3), or MIPS_EPILOGUE_TEMP ($5), and they must
   be general MIPS16 registers.  Pick $6 and $7.  */
#undef EH_RETURN_DATA_REGNO
#define EH_RETURN_DATA_REGNO(N) \
  ((N) < 2 ? 7 - (N) : INVALID_REGNUM)

/* Use $5 as a temporary for both MIPS16 and non-MIPS16.  */
#undef MIPS_EPILOGUE_TEMP_REGNUM
#define MIPS_EPILOGUE_TEMP_REGNUM \
  (cfun->machine->interrupt_handler_p ? K0_REG_NUM : GP_REG_FIRST + 5)

/* Using long will always be right for size_t and ptrdiff_t, since
   sizeof(long) must equal sizeof(void *), following from the setting
   of the -mlong64 option.  */
#undef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"
#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"

/* Force all .init and .fini entries to be 32-bit, not mips16, so that
   in a mixed environment they are all the same mode. The crti.asm and
   crtn.asm files will also be compiled as 32-bit due to the
   -no-mips16 flag in SUBTARGET_ASM_SPEC above. */
#undef CRT_CALL_STATIC_FUNCTION
#define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
   asm (SECTION_OP "\n\
	.set push\n\
	.set nomips16\n\
	jal " USER_LABEL_PREFIX #FUNC "\n\
	.set pop\n\
	" TEXT_SECTION_ASM_OP);