1  /* Definitions of target machine for GNU compiler.
       2     MIPS SDE version, for use with the SDE C library rather than newlib.
       3     Copyright (C) 2007-2023 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  #define TARGET_OS_CPP_BUILTINS()			\
      22    do							\
      23      {							\
      24        builtin_assert ("system=sde");			\
      25        builtin_assert ("system=posix");			\
      26        builtin_define ("__SDE_MIPS__");			\
      27  							\
      28        /* Deprecated: use __mips_isa_rev >= 2.  */	\
      29        if (ISA_MIPS32R2)					\
      30          builtin_define ("__mipsr2");			\
      31  							\
      32        /* Deprecated: use __mips_fpr == 64.  */		\
      33        if (TARGET_FLOAT64)				\
      34  	builtin_define ("__mipsfp64");			\
      35  							\
      36        if (TARGET_NO_FLOAT) 				\
      37  	builtin_define ("__NO_FLOAT");			\
      38        else if (TARGET_SOFT_FLOAT_ABI)			\
      39  	builtin_define ("__SOFT_FLOAT");		\
      40        else if (TARGET_SINGLE_FLOAT)			\
      41  	builtin_define ("__SINGLE_FLOAT");		\
      42  							\
      43        if (TARGET_BIG_ENDIAN)				\
      44          {						\
      45  	  builtin_assert ("endian=big");		\
      46  	  builtin_assert ("cpu=mipseb");		\
      47  	}						\
      48        else						\
      49          {						\
      50  	  builtin_assert ("endian=little");		\
      51  	  builtin_assert ("cpu=mipsel");		\
      52  	}						\
      53      }							\
      54    while (0)
      55  
      56  /* For __clear_cache in libgcc2.c.  */
      57  #ifdef IN_LIBGCC2
      58  extern void mips_sync_icache (void *beg, unsigned long len);
      59  #undef CLEAR_INSN_CACHE
      60  #define CLEAR_INSN_CACHE(beg, end) \
      61    mips_sync_icache (beg, end - beg)
      62  #endif
      63  
      64  /* For mips_cache_flush_func in mips.opt.  */
      65  #undef CACHE_FLUSH_FUNC
      66  #define CACHE_FLUSH_FUNC "mips_sync_icache"
      67  
      68  /* For inline code which needs to sync the icache and dcache,
      69     noting that the SDE library takes arguments (address, size).  */
      70  #undef MIPS_ICACHE_SYNC
      71  #define MIPS_ICACHE_SYNC(ADDR, SIZE)					\
      72    emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func),	\
      73  		     LCT_NORMAL, VOIDmode, ADDR, Pmode,			\
      74  		     SIZE, TYPE_MODE (sizetype))
      75  
      76  /* This version of _mcount does not pop 2 words from the stack.  */
      77  #undef FUNCTION_PROFILER
      78  #define FUNCTION_PROFILER(FILE, LABELNO)				\
      79    {									\
      80      mips_push_asm_switch (&mips_noat);					\
      81      /* _mcount treats $2 as the static chain register.  */		\
      82      if (cfun->static_chain_decl != NULL)				\
      83        fprintf (FILE, "\tmove\t%s,%s\n", reg_names[2],			\
      84  	       reg_names[STATIC_CHAIN_REGNUM]);				\
      85      /* MIPS16 code passes saved $ra in $v1 instead of $at.  */		\
      86      fprintf (FILE, "\tmove\t%s,%s\n",					\
      87  	     reg_names[GP_REG_FIRST + (TARGET_MIPS16 ? 3 : 1)],		\
      88  	     reg_names[RETURN_ADDR_REGNUM]);				\
      89      fprintf (FILE, "\tjal\t_mcount\n");					\
      90      mips_pop_asm_switch (&mips_noat);					\
      91      /* _mcount treats $2 as the static chain register.  */		\
      92      if (cfun->static_chain_decl != NULL)				\
      93        fprintf (FILE, "\tmove\t%s,%s\n", reg_names[STATIC_CHAIN_REGNUM],	\
      94  	       reg_names[2]);						\
      95    }
      96  
      97  /* ...nor does the call sequence preserve $31.  */
      98  #undef MIPS_SAVE_REG_FOR_PROFILING_P
      99  #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) ((REGNO) == RETURN_ADDR_REGNUM)
     100  
     101  /* Compile in support for the -mno-float option.  */
     102  #define TARGET_SUPPORTS_NO_FLOAT 1