gcc/config/mips/sde.h

   1 /* Definitions of target machine for GNU compiler.
   2    MIPS SDE version.
   3    Copyright (C) 2003-2017 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);