path: root/gcc/config/rx/rx.h

/* GCC backend definitions for the Renesas RX processor.
   Copyright (C) 2008-2018 Free Software Foundation, Inc.
   Contributed by Red Hat.

   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/>.  */


#define TARGET_CPU_CPP_BUILTINS()               \
  do                                            \
    {                                           \
      builtin_define ("__RX__"); 		\
      builtin_assert ("cpu=RX"); 		\
      if (rx_cpu_type == RX610)			\
	{					\
          builtin_define ("__RX610__");		\
          builtin_assert ("machine=RX610");	\
	}					\
      else if (rx_cpu_type == RX100)		\
	{					\
          builtin_define ("__RX100__");		\
          builtin_assert ("machine=RX100");	\
	}					\
      else if (rx_cpu_type == RX200)		\
	{					\
          builtin_define ("__RX200__");		\
          builtin_assert ("machine=RX200");	\
        }					\
      else if (rx_cpu_type == RX600)		\
        {					\
          builtin_define ("__RX600__");		\
          builtin_assert ("machine=RX600");	\
        }					\
						\
      if (TARGET_BIG_ENDIAN_DATA)		\
	builtin_define ("__RX_BIG_ENDIAN__");	\
      else					\
	builtin_define ("__RX_LITTLE_ENDIAN__");\
      						\
      if (TARGET_64BIT_DOUBLES)			\
	builtin_define ("__RX_64BIT_DOUBLES__");\
      else					\
	builtin_define ("__RX_32BIT_DOUBLES__");\
      						\
      if (ALLOW_RX_FPU_INSNS)			\
	builtin_define ("__RX_FPU_INSNS__");	\
						\
      if (TARGET_AS100_SYNTAX)			\
	builtin_define ("__RX_AS100_SYNTAX__"); \
      else					\
	builtin_define ("__RX_GAS_SYNTAX__");   \
						\
      if (TARGET_GCC_ABI)			\
	builtin_define ("__RX_GCC_ABI__");	\
      else					\
	builtin_define ("__RX_ABI__");		\
						\
      if (rx_allow_string_insns)		\
	builtin_define ("__RX_ALLOW_STRING_INSNS__"); \
      else					\
	builtin_define ("__RX_DISALLOW_STRING_INSNS__");\
    }                                           \
  while (0)

#undef  CC1_SPEC
#define CC1_SPEC "\
  %{mas100-syntax:%{gdwarf*:%e-mas100-syntax is incompatible with -gdwarf}} \
  %{mcpu=rx100:%{fpu:%erx100 cpu does not have FPU hardware}} \
  %{mcpu=rx200:%{fpu:%erx200 cpu does not have FPU hardware}}"

#undef  STARTFILE_SPEC
#define STARTFILE_SPEC "%{pg:gcrt0.o%s}%{!pg:crt0.o%s} crtbegin.o%s"

#undef  ENDFILE_SPEC
#define ENDFILE_SPEC "crtend.o%s crtn.o%s"

#undef  CPP_SPEC
#define CPP_SPEC "\
%{mpid:-D_RX_PID=1} \
%{mint-register=*:-D_RX_INT_REGISTERS=%*} \
%{msmall-data-limit*:-D_RX_SMALL_DATA} \
"

#undef  ASM_SPEC
#define ASM_SPEC "\
%{mbig-endian-data:-mbig-endian-data} \
%{m64bit-doubles:-m64bit-doubles} \
%{!m64bit-doubles:-m32bit-doubles} \
%{msmall-data-limit*:-msmall-data-limit} \
%{mrelax:-relax} \
%{mpid} \
%{mno-allow-string-insns} \
%{mint-register=*} \
%{mgcc-abi:-mgcc-abi} %{!mgcc-abi:-mrx-abi} \
%{mcpu=*} \
"

#undef  LIB_SPEC
#define LIB_SPEC "					\
--start-group						\
-lc							\
%{msim:-lsim}%{!msim:-lnosys}				\
%{fprofile-arcs|fprofile-generate|coverage:-lgcov} 	\
--end-group					   	\
%{!T*: %{msim:%Trx-sim.ld}%{!msim:%Trx.ld}}		\
"

#undef  LINK_SPEC
#define LINK_SPEC "%{mbig-endian-data:--oformat elf32-rx-be} %{mrelax:-relax}"


#define BITS_BIG_ENDIAN 		0
#define BYTES_BIG_ENDIAN 		TARGET_BIG_ENDIAN_DATA
#define WORDS_BIG_ENDIAN 		TARGET_BIG_ENDIAN_DATA

#define UNITS_PER_WORD 			4

#define INT_TYPE_SIZE			32
#define LONG_TYPE_SIZE			32
#define LONG_LONG_TYPE_SIZE		64

#define FLOAT_TYPE_SIZE 		32
#define DOUBLE_TYPE_SIZE 		(TARGET_64BIT_DOUBLES ? 64 : 32)
#define LONG_DOUBLE_TYPE_SIZE		DOUBLE_TYPE_SIZE

#define DEFAULT_SIGNED_CHAR		0

/* RX load/store instructions can handle unaligned addresses.  */
#define STRICT_ALIGNMENT 		0
#define FUNCTION_BOUNDARY 		((rx_cpu_type == RX100 || rx_cpu_type == RX200) ? 4 : 8)
#define BIGGEST_ALIGNMENT 		32
#define STACK_BOUNDARY 			32
#define PARM_BOUNDARY 			8

#define STACK_GROWS_DOWNWARD		1
#define FRAME_GROWS_DOWNWARD		0
#define FIRST_PARM_OFFSET(FNDECL) 	0

#define MAX_REGS_PER_ADDRESS 		2

#define Pmode 				SImode
#define POINTER_SIZE			32
#undef  SIZE_TYPE
#define SIZE_TYPE			"long unsigned int"
#undef  PTRDIFF_TYPE
#define PTRDIFF_TYPE			"long int"
#undef  WCHAR_TYPE
#define WCHAR_TYPE			"long int"
#undef  WCHAR_TYPE_SIZE
#define WCHAR_TYPE_SIZE			BITS_PER_WORD
#define POINTERS_EXTEND_UNSIGNED	1
#define FUNCTION_MODE 			QImode
#define CASE_VECTOR_MODE		Pmode
#define WORD_REGISTER_OPERATIONS	1
#define HAS_LONG_COND_BRANCH		0
#define HAS_LONG_UNCOND_BRANCH		0

#define MOVE_MAX 			4

#define HAVE_PRE_DECREMENT		1
#define HAVE_POST_INCREMENT		1

#define MOVE_RATIO(SPEED) 		((SPEED) ? 4 : 2)
#define SLOW_BYTE_ACCESS		1

#define STORE_FLAG_VALUE		1
#define LOAD_EXTEND_OP(MODE)		SIGN_EXTEND
#define SHORT_IMMEDIATES_SIGN_EXTEND	1

enum reg_class
{
  NO_REGS,			/* No registers in set.  */
  GR_REGS,			/* Integer registers.  */
  ALL_REGS,			/* All registers.  */
  LIM_REG_CLASSES		/* Max value + 1.  */
};

#define REG_CLASS_NAMES					\
{							\
  "NO_REGS",						\
  "GR_REGS",						\
  "ALL_REGS"						\
}

#define REG_CLASS_CONTENTS				\
{							\
  { 0x00000000 },	/* No registers,  */		\
  { 0x0000ffff },	/* Integer registers.  */	\
  { 0x0000ffff }	/* All registers.  */		\
}

#define N_REG_CLASSES			(int) LIM_REG_CLASSES
#define CLASS_MAX_NREGS(CLASS, MODE)    ((GET_MODE_SIZE (MODE) \
					  + UNITS_PER_WORD - 1) \
					 / UNITS_PER_WORD)

#define GENERAL_REGS			GR_REGS
#define BASE_REG_CLASS  		GR_REGS
#define INDEX_REG_CLASS			GR_REGS

#define FIRST_PSEUDO_REGISTER 		17

#define REGNO_REG_CLASS(REGNO)          ((REGNO) < FIRST_PSEUDO_REGISTER \
					 ? GR_REGS : NO_REGS)

#define STACK_POINTER_REGNUM 	        0
#define FUNC_RETURN_REGNUM              1
#define FRAME_POINTER_REGNUM 		6
#define ARG_POINTER_REGNUM 		7
#define STATIC_CHAIN_REGNUM 		8
#define TRAMPOLINE_TEMP_REGNUM		9
#define STRUCT_VAL_REGNUM		15
#define CC_REGNUM                       16

/* This is the register which will probably be used to hold the address of
   the start of the small data area, if -msmall-data-limit is being used,
   or the address of the constant data area if -mpid is being used.  If both
   features are in use then two consecutive registers will be used.

   Note - these registers must not be call_used because otherwise library
   functions that are compiled without -msmall-data-limit/-mpid support
   might clobber them.

   Note that the actual values used depends on other options; use
   rx_gp_base_regnum() and rx_pid_base_regnum() instead.  */
#define GP_BASE_REGNUM			13

#define ELIMINABLE_REGS					\
{{ ARG_POINTER_REGNUM,   STACK_POINTER_REGNUM },	\
 { ARG_POINTER_REGNUM,   FRAME_POINTER_REGNUM },	\
 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }}

#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)	\
  (OFFSET) = rx_initial_elimination_offset ((FROM), (TO))


#define FUNCTION_ARG_REGNO_P(N)	  	(((N) >= 1) && ((N) <= 4))
#define FUNCTION_VALUE_REGNO_P(N) 	((N) == FUNC_RETURN_REGNUM)
#define DEFAULT_PCC_STRUCT_RETURN	0

#define FIXED_REGISTERS					\
{							\
  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1	\
}

#define CALL_USED_REGISTERS				\
{							\
  1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1	\
}

#define LIBCALL_VALUE(MODE)				\
  gen_rtx_REG (((GET_MODE_CLASS (MODE) != MODE_INT	\
                 || COMPLEX_MODE_P (MODE)		\
                 || VECTOR_MODE_P (MODE)		\
		 || GET_MODE_SIZE (MODE) >= 4)		\
		? (MODE)				\
		: SImode),				\
	       FUNC_RETURN_REGNUM)

/* Order of allocation of registers.  */

#define REG_ALLOC_ORDER						\
{  7,  10,  11,  12,  13,  14,  4,  3,  2,  1, 9, 8, 6, 5, 15	\
}

#define REGNO_IN_RANGE(REGNO, MIN, MAX)		\
  (IN_RANGE ((REGNO), (MIN), (MAX)) 		\
   || (reg_renumber != NULL			\
       && reg_renumber[(REGNO)] >= (MIN)	\
       && reg_renumber[(REGNO)] <= (MAX)))

#ifdef REG_OK_STRICT
#define REGNO_OK_FOR_BASE_P(regno)      REGNO_IN_RANGE (regno, 0, 15)
#else
#define REGNO_OK_FOR_BASE_P(regno)	1
#endif

#define REGNO_OK_FOR_INDEX_P(regno)	REGNO_OK_FOR_BASE_P (regno)

#define RTX_OK_FOR_BASE(X, STRICT)				\
  ((STRICT) ?							\
   (   (REG_P (X)						\
        && REGNO_IN_RANGE (REGNO (X), 0, 15))			\
    || (GET_CODE (X) == SUBREG					\
        && REG_P (SUBREG_REG (X))				\
        && REGNO_IN_RANGE (REGNO (SUBREG_REG (X)), 0, 15)))	\
   :								\
    ( (REG_P (X)						\
       || (GET_CODE (X) == SUBREG				\
	   && REG_P (SUBREG_REG (X))))))


#define RETURN_ADDR_RTX(COUNT, FRAMEADDR)				\
  ((COUNT) == 0								\
   ? gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (-4))) \
   : NULL_RTX)

#define INCOMING_RETURN_ADDR_RTX	gen_rtx_MEM (Pmode, stack_pointer_rtx)

#define ACCUMULATE_OUTGOING_ARGS	1

typedef unsigned int CUMULATIVE_ARGS;

#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
  (CUM) = 0


#define TRAMPOLINE_SIZE 	(! TARGET_BIG_ENDIAN_DATA ? 14 : 20)
#define TRAMPOLINE_ALIGNMENT 	32

#define NO_PROFILE_COUNTERS     1
#define PROFILE_BEFORE_PROLOGUE 1

#define FUNCTION_PROFILER(FILE, LABELNO)	\
    fprintf (FILE, "\tbsr\t__mcount\n");


#define REGISTER_NAMES						\
  {								\
    "r0",  "r1",  "r2",   "r3",   "r4",   "r5",   "r6",   "r7",	\
      "r8",  "r9",  "r10",  "r11",  "r12",  "r13",  "r14",  "r15", "cc"	\
  }

#define ADDITIONAL_REGISTER_NAMES	\
{					\
    { "sp",    STACK_POINTER_REGNUM }	\
  , { "fp",    FRAME_POINTER_REGNUM }	\
  , { "arg",   ARG_POINTER_REGNUM }	\
  , { "chain", STATIC_CHAIN_REGNUM }	\
}

#define DATA_SECTION_ASM_OP	      			\
  (TARGET_AS100_SYNTAX ? "\t.SECTION D,DATA" 		\
   : "\t.section D,\"aw\",@progbits\n\t.p2align 2")

#define SDATA_SECTION_ASM_OP	      			\
  (TARGET_AS100_SYNTAX ? "\t.SECTION D_2,DATA,ALIGN=2" 	\
   : "\t.section D_2,\"aw\",@progbits\n\t.p2align 1")

#undef  READONLY_DATA_SECTION_ASM_OP
#define READONLY_DATA_SECTION_ASM_OP  			\
  (TARGET_AS100_SYNTAX ? "\t.SECTION C,ROMDATA,ALIGN=4" \
   : "\t.section C,\"a\",@progbits\n\t.p2align 2")

#define BSS_SECTION_ASM_OP	      			\
  (TARGET_AS100_SYNTAX ? "\t.SECTION B,DATA,ALIGN=4" 	\
   : "\t.section B,\"w\",@nobits\n\t.p2align 2")

#define SBSS_SECTION_ASM_OP	      			\
  (TARGET_AS100_SYNTAX ? "\t.SECTION B_2,DATA,ALIGN=2" 	\
   : "\t.section B_2,\"w\",@nobits\n\t.p2align 1")

/* The following definitions are conditional depending upon whether the
   compiler is being built or crtstuff.c is being compiled by the built
   compiler.  */
#if defined CRT_BEGIN || defined CRT_END
# ifdef __RX_AS100_SYNTAX
#  define TEXT_SECTION_ASM_OP	      "\t.SECTION P,CODE"
#  define CTORS_SECTION_ASM_OP	      "\t.SECTION init_array,CODE"
#  define DTORS_SECTION_ASM_OP	      "\t.SECTION fini_array,CODE"
#  define INIT_ARRAY_SECTION_ASM_OP   "\t.SECTION init_array,CODE"
#  define FINI_ARRAY_SECTION_ASM_OP   "\t.SECTION fini_array,CODE"
# else
#  define TEXT_SECTION_ASM_OP	      "\t.section P,\"ax\""
#  define CTORS_SECTION_ASM_OP	      \
  "\t.section\t.init_array,\"awx\",@init_array"
#  define DTORS_SECTION_ASM_OP	      \
  "\t.section\t.fini_array,\"awx\",@fini_array"
#  define INIT_ARRAY_SECTION_ASM_OP   \
  "\t.section\t.init_array,\"awx\",@init_array"
#  define FINI_ARRAY_SECTION_ASM_OP   \
  "\t.section\t.fini_array,\"awx\",@fini_array"
# endif
#else
# define TEXT_SECTION_ASM_OP	      \
  (TARGET_AS100_SYNTAX ? "\t.SECTION P,CODE" : "\t.section P,\"ax\"")

# define CTORS_SECTION_ASM_OP			      \
  (TARGET_AS100_SYNTAX ? "\t.SECTION init_array,CODE" \
   : "\t.section\t.init_array,\"awx\",@init_array")

# define DTORS_SECTION_ASM_OP			      \
  (TARGET_AS100_SYNTAX ? "\t.SECTION fini_array,CODE" \
   : "\t.section\t.fini_array,\"awx\",@fini_array")

# define INIT_ARRAY_SECTION_ASM_OP		      \
  (TARGET_AS100_SYNTAX ? "\t.SECTION init_array,CODE" \
   : "\t.section\t.init_array,\"awx\",@init_array")

# define FINI_ARRAY_SECTION_ASM_OP		      \
  (TARGET_AS100_SYNTAX ? "\t.SECTION fini_array,CODE" \
   : "\t.section\t.fini_array,\"awx\",@fini_array")
#endif

#define GLOBAL_ASM_OP 		\
  (TARGET_AS100_SYNTAX ? "\t.GLB\t" : "\t.global\t")
#define ASM_COMMENT_START	" ;"
#define ASM_APP_ON		""
#define ASM_APP_OFF 		""
#define LOCAL_LABEL_PREFIX	"L"
#undef  USER_LABEL_PREFIX
#define USER_LABEL_PREFIX	"_"

/* Compute the alignment needed for label X in various situations.
   If the user has specified an alignment then honour that, otherwise
   use rx_align_for_label.  */
#define JUMP_ALIGN(x)				(align_jumps_log > 0 ? align_jumps_log : rx_align_for_label (x, 0))
#define LABEL_ALIGN(x)				(align_labels_log > 0 ? align_labels_log : rx_align_for_label (x, 3))
#define LOOP_ALIGN(x)				(align_loops_log > 0 ? align_loops_log : rx_align_for_label (x, 2))
#define LABEL_ALIGN_AFTER_BARRIER(x)		rx_align_for_label (x, 0)

#define ASM_OUTPUT_MAX_SKIP_ALIGN(STREAM, LOG, MAX_SKIP)	\
  do						\
    {						\
      if ((LOG) == 0 || (MAX_SKIP) == 0)	\
        break;					\
      if (TARGET_AS100_SYNTAX)			\
	{					\
	  if ((LOG) >= 2)			\
	    fprintf (STREAM, "\t.ALIGN 4\t; %d alignment actually requested\n", 1 << (LOG)); \
	  else					\
	    fprintf (STREAM, "\t.ALIGN 2\n");	\
	}					\
      else					\
	fprintf (STREAM, "\t.balign %d,3,%d\n", 1 << (LOG), (MAX_SKIP));	\
    }						\
  while (0)

#define ASM_OUTPUT_ALIGN(STREAM, LOG)		\
  do						\
    {						\
      if ((LOG) == 0)				\
        break;					\
      if (TARGET_AS100_SYNTAX)			\
	{					\
	  if ((LOG) >= 2)			\
	    fprintf (STREAM, "\t.ALIGN 4\t; %d alignment actually requested\n", 1 << (LOG)); \
	  else					\
	    fprintf (STREAM, "\t.ALIGN 2\n");	\
	}					\
      else					\
	fprintf (STREAM, "\t.balign %d\n", 1 << (LOG));	\
    }						\
  while (0)

#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
  fprintf (FILE, TARGET_AS100_SYNTAX ? "\t.LWORD L%d\n" : "\t.long .L%d\n", \
	   VALUE)

/* This is how to output an element of a case-vector that is relative.
   Note: The local label referenced by the "1b" below is emitted by
   the tablejump insn.  */

#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
  fprintf (FILE, TARGET_AS100_SYNTAX \
	   ? "\t.LWORD L%d - ?-\n" : "\t.long .L%d - 1b\n", VALUE)

#define CASE_VECTOR_PC_RELATIVE	(TARGET_PID)

#define ASM_OUTPUT_SIZE_DIRECTIVE(STREAM, NAME, SIZE)			\
  do									\
    {									\
      HOST_WIDE_INT size_ = (SIZE);					\
									\
      /* The as100 assembler does not have an equivalent of the SVR4    \
	 .size pseudo-op.  */						\
      if (TARGET_AS100_SYNTAX)						\
	break;								\
									\
      fputs (SIZE_ASM_OP, STREAM);					\
      assemble_name (STREAM, NAME);					\
      fprintf (STREAM, ", " HOST_WIDE_INT_PRINT_DEC "\n", size_);	\
    }									\
  while (0)

#define ASM_OUTPUT_MEASURED_SIZE(STREAM, NAME)				\
  do									\
    {									\
      /* The as100 assembler does not have an equivalent of the SVR4    \
	 .size pseudo-op.  */						\
      if (TARGET_AS100_SYNTAX)						\
	break;								\
      fputs (SIZE_ASM_OP, STREAM);					\
      assemble_name (STREAM, NAME);					\
      fputs (", .-", STREAM);						\
      assemble_name (STREAM, NAME);					\
      putc ('\n', STREAM);						\
    }									\
  while (0)

#define ASM_OUTPUT_TYPE_DIRECTIVE(STREAM, NAME, TYPE)			\
  do									\
    {									\
      /* The as100 assembler does not have an equivalent of the SVR4    \
	 .size pseudo-op.  */						\
      if (TARGET_AS100_SYNTAX)						\
	break;								\
      fputs (TYPE_ASM_OP, STREAM);					\
      assemble_name (STREAM, NAME);					\
      fputs (", ", STREAM);						\
      fprintf (STREAM, TYPE_OPERAND_FMT, TYPE);				\
      putc ('\n', STREAM);						\
    }									\
  while (0)

#undef  ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM)		\
  do								\
    {								\
      sprintf (LABEL, TARGET_AS100_SYNTAX ? "*%s%u" : "*.%s%u", \
	       PREFIX, (unsigned) (NUM));			\
    }								\
  while (0)

#undef  ASM_OUTPUT_EXTERNAL
#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)			\
  do								\
    {								\
      if (TARGET_AS100_SYNTAX)					\
	targetm.asm_out.globalize_label (FILE, NAME);		\
      default_elf_asm_output_external (FILE, DECL, NAME);	\
    }								\
  while (0)

#undef  ASM_OUTPUT_ALIGNED_COMMON
#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)		\
  do									\
    {									\
      if (TARGET_AS100_SYNTAX)						\
	{								\
	  fprintf ((FILE), "\t.GLB\t");					\
	  assemble_name ((FILE), (NAME));				\
	  fprintf ((FILE), "\n");					\
          assemble_name ((FILE), (NAME));				\
	  switch ((ALIGN) / BITS_PER_UNIT)				\
            {								\
            case 4:							\
              fprintf ((FILE), ":\t.BLKL\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
		       (SIZE) / 4);					\
	      break;							\
            case 2:							\
              fprintf ((FILE), ":\t.BLKW\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
		       (SIZE) / 2);					\
	      break;							\
            default:							\
              fprintf ((FILE), ":\t.BLKB\t" HOST_WIDE_INT_PRINT_UNSIGNED"\n",\
		       (SIZE));						\
	      break;							\
            }								\
        }								\
      else								\
        {								\
          fprintf ((FILE), "%s", COMMON_ASM_OP);			\
          assemble_name ((FILE), (NAME));				\
          fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n",	\
	           (SIZE), (ALIGN) / BITS_PER_UNIT);			\
	}								\
    }									\
  while (0)

#undef  SKIP_ASM_OP
#define SKIP_ASM_OP   (TARGET_AS100_SYNTAX ? "\t.BLKB\t" : "\t.zero\t")

#undef  ASM_OUTPUT_LIMITED_STRING
#define ASM_OUTPUT_LIMITED_STRING(FILE, STR)		\
  do							\
    {							\
      const unsigned char *_limited_str =		\
	(const unsigned char *) (STR);			\
      unsigned ch;					\
							\
      fprintf ((FILE), TARGET_AS100_SYNTAX 		\
	       ? "\t.BYTE\t\"" : "\t.string\t\"");	\
							\
      for (; (ch = *_limited_str); _limited_str++)	\
        {						\
	  int escape;					\
							\
	  switch (escape = ESCAPES[ch])			\
	    {						\
	    case 0:					\
	      putc (ch, (FILE));			\
	      break;					\
	    case 1:					\
	      fprintf ((FILE), "\\%03o", ch);		\
	      break;					\
	    default:					\
	      putc ('\\', (FILE));			\
	      putc (escape, (FILE));			\
	      break;					\
	    }						\
        }						\
							\
      fprintf ((FILE), TARGET_AS100_SYNTAX ? "\"\n\t.BYTE\t0\n" : "\"\n");\
    }							\
  while (0)

/* For PIC put jump tables into the text section so that the offsets that
   they contain are always computed between two same-section symbols.  */
#define JUMP_TABLES_IN_TEXT_SECTION	(TARGET_PID || flag_pic)

/* This is a version of REG_P that also returns TRUE for SUBREGs.  */
#define RX_REG_P(rtl) (REG_P (rtl) || GET_CODE (rtl) == SUBREG)

/* Like REG_P except that this macro is true for SET expressions.  */
#define SET_P(rtl)    (GET_CODE (rtl) == SET)

/* The AS100 assembler does not support .leb128 and .uleb128, but
   the compiler-build-time configure tests will have enabled their
   use because GAS supports them.  So default to generating STABS
   debug information instead of DWARF2 when generating AS100
   compatible output.  */
#undef  PREFERRED_DEBUGGING_TYPE
#define PREFERRED_DEBUGGING_TYPE (TARGET_AS100_SYNTAX \
				  ? DBX_DEBUG : DWARF2_DEBUG)

#define INCOMING_FRAME_SP_OFFSET		4
#define ARG_POINTER_CFA_OFFSET(FNDECL)		4

#define TARGET_USE_FPU		(! TARGET_NO_USE_FPU)

/* This macro is used to decide when RX FPU instructions can be used.  */
#define ALLOW_RX_FPU_INSNS	(TARGET_USE_FPU)

#define BRANCH_COST(SPEED,PREDICT)       1
#define REGISTER_MOVE_COST(MODE,FROM,TO) 2

#define SELECT_CC_MODE(OP,X,Y)  rx_select_cc_mode(OP, X, Y)

#define ADJUST_INSN_LENGTH(INSN,LENGTH)				\
  do								\
    {								\
      (LENGTH) = rx_adjust_insn_length ((INSN), (LENGTH));	\
    }								\
  while (0)