mcore.h

linux下的gcc编译器

   to do instead of doing that itself.  */
#define SHIFT_COUNT_TRUNCATED 1

/* All integers have the same format so truncation is easy.  */
#define TRULY_NOOP_TRUNCATION(OUTPREC,INPREC)  1

/* Define this if addresses of constant functions
   shouldn't be put through pseudo regs where they can be cse'd.
   Desirable on machines where ordinary constants are expensive
   but a CALL with constant address is cheap.  */
/* why is this defined??? -- dac */
#define NO_FUNCTION_CSE 1

/* Chars and shorts should be passed as ints.  */
#define PROMOTE_PROTOTYPES 1

/* The machine modes of pointers and functions.  */
#define Pmode          SImode
#define FUNCTION_MODE  Pmode

/* The relative costs of various types of constants.  Note that cse.c defines
   REG = 1, SUBREG = 2, any node = (2 + sum of subnodes).  */
#define CONST_COSTS(RTX, CODE, OUTER_CODE)      \
  case CONST_INT:				\
    return mcore_const_costs (RTX, OUTER_CODE); \
  case CONST: 					\
  case LABEL_REF:				\
  case SYMBOL_REF:				\
    return 5;					\
  case CONST_DOUBLE:				\
      return 10;

/* provide the cost for an address calculation.
   All addressing modes cost the same on the MCore.  */
#define	ADDRESS_COST(RTX)	1

/* Provide the cost of an rtl expression. */
#define RTX_COSTS(X, CODE, OUTER_CODE)			\
  case AND:                                             \
    return COSTS_N_INSNS (mcore_and_cost (X));          \
  case IOR:                                             \
    return COSTS_N_INSNS (mcore_ior_cost (X));          \
  case DIV:						\
  case UDIV:						\
  case MOD:						\
  case UMOD:						\
    return COSTS_N_INSNS (100);				\
  case FLOAT:						\
  case FIX:						\
    return 100;

/* Compute extra cost of moving data between one register class
   and another.  All register moves are cheap.  */
#define REGISTER_MOVE_COST(MODE, SRCCLASS, DSTCLASS) 2

#define WORD_REGISTER_OPERATIONS

/* Implicit library calls should use memcpy, not bcopy, etc.  */
#define TARGET_MEM_FUNCTIONS

/* Assembler output control.  */
#define ASM_COMMENT_START "\t//"

#define ASM_APP_ON	"// inline asm begin\n"
#define ASM_APP_OFF	"// inline asm end\n"

#define FILE_ASM_OP     "\t.file\n"

/* Switch to the text or data segment.  */
#define TEXT_SECTION_ASM_OP  "\t.text"
#define DATA_SECTION_ASM_OP  "\t.data"

#undef  EXTRA_SECTIONS
#define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS

#undef  EXTRA_SECTION_FUNCTIONS
#define EXTRA_SECTION_FUNCTIONS			\
  SUBTARGET_EXTRA_SECTION_FUNCTIONS		\
  SWITCH_SECTION_FUNCTION

/* Switch to SECTION (an `enum in_section').

   ??? This facility should be provided by GCC proper.
   The problem is that we want to temporarily switch sections in
   ASM_DECLARE_OBJECT_NAME and then switch back to the original section
   afterwards.  */
#define SWITCH_SECTION_FUNCTION					\
static void switch_to_section PARAMS ((enum in_section, tree));	\
static void							\
switch_to_section (section, decl)				\
     enum in_section section;					\
     tree decl;							\
{								\
  switch (section)						\
    {								\
      case in_text: text_section (); break;			\
      case in_data: data_section (); break;			\
      case in_named: named_section (decl, NULL, 0); break;	\
      SUBTARGET_SWITCH_SECTIONS      				\
      default: abort (); break;					\
    }								\
}

/* Switch into a generic section.  */
#undef TARGET_ASM_NAMED_SECTION
#define TARGET_ASM_NAMED_SECTION  mcore_asm_named_section

/* This is how to output an insn to push a register on the stack.
   It need not be very fast code.  */
#define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
  fprintf (FILE, "\tsubi\t %s,%d\n\tstw\t %s,(%s)\n",	\
	   reg_names[STACK_POINTER_REGNUM],		\
	   (STACK_BOUNDARY / BITS_PER_UNIT),		\
	   reg_names[REGNO],				\
	   reg_names[STACK_POINTER_REGNUM])

/* Length in instructions of the code output by ASM_OUTPUT_REG_PUSH.  */
#define REG_PUSH_LENGTH 2

/* This is how to output an insn to pop a register from the stack.  */
#define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
  fprintf (FILE, "\tldw\t %s,(%s)\n\taddi\t %s,%d\n",	\
	   reg_names[REGNO],				\
	   reg_names[STACK_POINTER_REGNUM],		\
	   reg_names[STACK_POINTER_REGNUM],		\
	   (STACK_BOUNDARY / BITS_PER_UNIT))

  
/* Output a reference to a label.  */
#undef  ASM_OUTPUT_LABELREF
#define ASM_OUTPUT_LABELREF(STREAM, NAME)  \
  fprintf (STREAM, "%s%s", USER_LABEL_PREFIX, \
	   (* targetm.strip_name_encoding) (NAME))

/* This is how to output an assembler line
   that says to advance the location counter
   to a multiple of 2**LOG bytes.  */
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
  if ((LOG) != 0)			\
    fprintf (FILE, "\t.align\t%d\n", LOG)

#ifndef ASM_DECLARE_RESULT
#define ASM_DECLARE_RESULT(FILE, RESULT)
#endif

#define MULTIPLE_SYMBOL_SPACES 1

#define SUPPORTS_ONE_ONLY 1

/* A pair of macros to output things for the callgraph data.
   VALUE means (to the tools that reads this info later):
  	0 a call from src to dst
  	1 the call is special (e.g. dst is "unknown" or "alloca")
  	2 the call is special (e.g., the src is a table instead of routine)
  
   Frame sizes are augmented with timestamps to help later tools 
   differentiate between static entities with same names in different
   files.  */
extern long mcore_current_compilation_timestamp;
#define	ASM_OUTPUT_CG_NODE(FILE,SRCNAME,VALUE)				\
  do									\
    {									\
      if (mcore_current_compilation_timestamp == 0)			\
        mcore_current_compilation_timestamp = time (0);			\
      fprintf ((FILE),"\t.equ\t__$frame$size$_%s_$_%08lx,%d\n",		\
             (SRCNAME), mcore_current_compilation_timestamp, (VALUE));	\
    }									\
  while (0)

#define	ASM_OUTPUT_CG_EDGE(FILE,SRCNAME,DSTNAME,VALUE)		\
  do								\
    {								\
      fprintf ((FILE),"\t.equ\t__$function$call$_%s_$_%s,%d\n",	\
             (SRCNAME), (DSTNAME), (VALUE));			\
    }								\
  while (0)

/* Globalizing directive for a label.  */
#define GLOBAL_ASM_OP "\t.export\t"

/* The prefix to add to user-visible assembler symbols. */
#undef  USER_LABEL_PREFIX
#define USER_LABEL_PREFIX ""

/* Make an internal label into a string.  */
#undef  ASM_GENERATE_INTERNAL_LABEL
#define ASM_GENERATE_INTERNAL_LABEL(STRING, PREFIX, NUM)  \
  sprintf (STRING, "*.%s%ld", PREFIX, (long) NUM)

/* Output an internal label definition.  */
#undef  ASM_OUTPUT_INTERNAL_LABEL
#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
  fprintf (FILE, ".%s%d:\n", PREFIX, NUM)

/* Construct a private name.  */
#define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER)  \
  ((OUTVAR) = (char *) alloca (strlen (NAME) + 10),  \
   sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))

/* Jump tables must be 32 bit aligned. */
#undef  ASM_OUTPUT_CASE_LABEL
#define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE) \
  fprintf (STREAM, "\t.align 2\n.%s%d:\n", PREFIX, NUM);

/* Output a relative address. Not needed since jump tables are absolute
   but we must define it anyway.  */
#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL)  \
  fputs ("- - - ASM_OUTPUT_ADDR_DIFF_ELT called!\n", STREAM)

/* Output an element of a dispatch table.  */
#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE)  \
    fprintf (STREAM, "\t.long\t.L%d\n", VALUE)

/* Output various types of constants.  */

/* This is how to output an assembler line
   that says to advance the location counter by SIZE bytes.  */
#undef  ASM_OUTPUT_SKIP
#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.fill %d, 1\n", (SIZE))

/* This says how to output an assembler line
   to define a global common symbol, with alignment information.  */
/* XXX - for now we ignore the alignment.  */     
#undef  ASM_OUTPUT_ALIGNED_COMMON
#define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)	\
  do								\
    {								\
      if (mcore_dllexport_name_p (NAME))			\
	MCORE_EXPORT_NAME (FILE, NAME)				\
      if (! mcore_dllimport_name_p (NAME))			\
        {							\
          fputs ("\t.comm\t", FILE);				\
          assemble_name (FILE, NAME);				\
          fprintf (FILE, ",%d\n", SIZE);			\
        }							\
    }								\
  while (0)

/* This says how to output an assembler line
   to define an external symbol.  */
#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)   \
  do						\
    {						\
      fputs ("\t.import\t", (FILE));		\
      assemble_name ((FILE), (NAME));		\
      fputs ("\n", (FILE));			\
    }						\
  while (0)
     
#undef	ASM_OUTPUT_EXTERNAL
/* RBE: we undefined this and let gas do it's "undefined is imported"
   games. This is because when we use this, we get a marked 
   reference through the call to assemble_name and this forces C++
   inlined member functions (or any inlined function) to be instantiated
   regardless of whether any callsites remain.
   This makes this aspect of the compiler non-ABI compliant.  */

/* Similar, but for libcall. FUN is an rtx.  */
#undef  ASM_OUTPUT_EXTERNAL_LIBCALL
#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN)	\
  do						\
    {						\
      fprintf (FILE, "\t.import\t");		\
      assemble_name (FILE, XSTR (FUN, 0));	\
      fprintf (FILE, "\n");			\
    }						\
  while (0)


/* This says how to output an assembler line
   to define a local common symbol...  */
#undef  ASM_OUTPUT_LOCAL
#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)	\
  (fputs ("\t.lcomm\t", FILE),				\
  assemble_name (FILE, NAME),				\
  fprintf (FILE, ",%d\n", SIZE))

/* ... and how to define a local common symbol whose alignment
   we wish to specify.  ALIGN comes in as bits, we have to turn
   it into bytes.  */
#undef  ASM_OUTPUT_ALIGNED_LOCAL
#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)		\
  do									\
    {									\
      fputs ("\t.bss\t", (FILE));					\
      assemble_name ((FILE), (NAME));					\
      fprintf ((FILE), ",%d,%d\n", (SIZE), (ALIGN) / BITS_PER_UNIT);	\
    }									\
  while (0)

/* Print operand X (an rtx) in assembler syntax to file FILE.
   CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified.
   For `%' followed by punctuation, CODE is the punctuation and X is null.  */
#define PRINT_OPERAND(STREAM, X, CODE)  mcore_print_operand (STREAM, X, CODE)

/* Print a memory address as an operand to reference that memory location.  */
#define PRINT_OPERAND_ADDRESS(STREAM,X)  mcore_print_operand_address (STREAM, X)

#define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \
  ((CHAR)=='.' || (CHAR) == '#' || (CHAR) == '*' || (CHAR) == '^' || (CHAR) == '!')

/* This is to handle loads from the constant pool.  */
#define MACHINE_DEPENDENT_REORG(X) mcore_dependent_reorg (X)

#define PREDICATE_CODES							\
  { "mcore_arith_reg_operand",		{ REG, SUBREG }},		\
  { "mcore_general_movsrc_operand",	{ MEM, CONST_INT, REG, SUBREG }},\
  { "mcore_general_movdst_operand",	{ MEM, CONST_INT, REG, SUBREG }},\
  { "mcore_reload_operand",	        { MEM, REG, SUBREG }},		\
  { "mcore_arith_J_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_K_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_K_operand_not_0",	{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_M_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_K_S_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_O_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_imm_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_arith_any_imm_operand",	{ CONST_INT, REG, SUBREG }},	\
  { "mcore_literal_K_operand",		{ CONST_INT }},			\
  { "mcore_addsub_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_compare_operand",		{ CONST_INT, REG, SUBREG }},	\
  { "mcore_load_multiple_operation",	{ PARALLEL }},			\
  { "mcore_store_multiple_operation",	{ PARALLEL }},			\
  { "mcore_call_address_operand",	{ REG, SUBREG, CONST_INT }},	\

#endif /* ! GCC_MCORE_H */