tm-i860.h

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/* Max number of bytes we can move from memory to memory
   in one reasonably fast instruction.  */
#define MOVE_MAX 16

/* Nonzero if access to memory by bytes is slow and undesirable.  */
#define SLOW_BYTE_ACCESS 0

/* This is System V, so it wants sdb format.  */
#define DBX_DEBUGGING_INFO

/* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
   is done just by pretending it is already truncated.  */
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1

/* Specify the machine mode that pointers have.
   After generation of rtl, the compiler makes no further distinction
   between pointers and any other objects of this machine mode.  */
#define Pmode SImode

/* A function address in a call instruction
   is a byte address (for indexing purposes)
   so give the MEM rtx a byte's mode.  */
#define FUNCTION_MODE SImode

/* 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.  */
#define NO_FUNCTION_CSE

/* Compute the cost of computing a constant rtl expression RTX
   whose rtx-code is CODE.  The body of this macro is a portion
   of a switch statement.  If the code is computed here,
   return it with a return statement.  Otherwise, break from the switch.  */

#define CONST_COSTS(RTX,CODE) \
  case CONST_INT:						\
    if (INTVAL (RTX) == 0)					\
      return 0;							\
    if (INTVAL (RTX) < 0x2000 && INTVAL (RTX) >= -0x2000) return 1; \
  case CONST:							\
  case LABEL_REF:						\
  case SYMBOL_REF:						\
    return 2;							\
  case CONST_DOUBLE:						\
    return 2 * GET_MODE_SIZE (GET_MODE (RTX)) / UNITS_PER_WORD;

/* Tell final.c how to eliminate redundant test instructions.  */

/* Here we define machine-dependent flags and fields in cc_status
   (see `conditions.h').  */

/* This holds the value sourcing h%r31.  We keep this info
   around so that mem/mem ops, such as increment and decrement,
   etc, can be performed reasonably.  */
#define CC_STATUS_MDEP rtx

#define CC_STATUS_MDEP_INIT (cc_status.mdep = 0)

/* On the i860, each comparison tests just one condition,
   so only that condition can be remembered.
   We don't need GT, GE, GTU and GEU because CC_REVERSED can handle them.  */
#define CC_ONLY_EQ 0100
#define CC_ONLY_LE 0200
#define CC_ONLY_LT 0400
#define CC_ONLY_LEU 02000
#define CC_ONLY_LTU 04000
#define CC_CONDITION_MASK 07700

/* Non-zero to invert the sense of the condition code.  */
#define CC_NEGATED 010000

/* Nonzero if we know the value of h%r31.  */
#define CC_KNOW_HI_R31 0100000

/* Nonzero if h%r31 is actually ha%something, rather than h%something.  */
#define CC_HI_R31_ADJ 0200000

/* Store in cc_status the expressions
   that the condition codes will describe
   after execution of an instruction whose pattern is EXP.
   Do not alter them if the instruction would not alter the cc's.  */

/* On the i860, only compare insns set a useful condition code.  */

#define NOTICE_UPDATE_CC(EXP, INSN) \
{ cc_status.flags &= (CC_KNOW_HI_R31 | CC_HI_R31_ADJ);	\
  cc_status.value1 = 0; cc_status.value2 = 0; }

/* Control the assembler format that we output.  */

/* Output at beginning of assembler file.  */
/* The .file command should always begin the output.  */

#define ASM_FILE_START(FILE)
#if 0
#define ASM_FILE_START(FILE)				\
  do { sdbout_filename ((FILE), main_input_filename);	\
       if (optimize) ASM_FILE_START_1 (FILE);		\
     } while (0)
#endif

#define ASM_FILE_START_1(FILE)

/* Output to assembler file text saying following lines
   may contain character constants, extra white space, comments, etc.  */

#define ASM_APP_ON ""

/* Output to assembler file text saying following lines
   no longer contain unusual constructs.  */

#define ASM_APP_OFF ""

/* Output before read-only data.  */

#define TEXT_SECTION_ASM_OP ".text"

/* Output before writable data.  */

#define DATA_SECTION_ASM_OP ".data"

/* How to refer to registers in assembler output.
   This sequence is indexed by compiler's hard-register-number (see above).  */

#define REGISTER_NAMES \
{"r0", "r1", "sp", "fp", "r4", "r5", "r6", "r7", "r8", "r9",		\
 "r10", "r11", "r12", "r13", "r14", "r15", "r16", "r17", "r18", "r19",	\
 "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", "r28", "r29",	\
 "r30", "r31",								\
 "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9",		\
 "f10", "f11", "f12", "f13", "f14", "f15", "f16", "f17", "f18", "f19",	\
 "f20", "f21", "f22", "f23", "f24", "f25", "f26", "f27", "f28", "f29",	\
 "f30", "f31" }

/* How to renumber registers for dbx and gdb.  */

#define DBX_REGISTER_NUMBER(REGNO) (REGNO)

/* This is how to output the definition of a user-level label named NAME,
   such as the label on a static function or variable NAME.  */

#define ASM_OUTPUT_LABEL(FILE,NAME)	\
  do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0)

/* Likewise, for function names.  The difference is that we output a no-op
   just before the beginning of the function, to ensure that there does not
   appear to be a delayed branch there.
   Such a thing would confuse interrupt recovery.  */
#define ASM_DECLARE_FUNCTION_NAME(FILE,NAME,DECL) \
  do { fprintf (FILE, "\tnop\n"); ASM_OUTPUT_LABEL (FILE,NAME); } while (0)

/* This is how to output a command to make the user-level label named NAME
   defined for reference from other files.  */

#define ASM_GLOBALIZE_LABEL(FILE,NAME)	\
  do { fputs (".globl ", FILE); assemble_name (FILE, NAME); fputs ("\n", FILE);} while (0)

/* This is how to output a reference to a user-level label named NAME.
   `assemble_name' uses this.  */

#define ASM_OUTPUT_LABELREF(FILE,NAME)	\
  fprintf (FILE, "_%s", NAME)

/* This is how to output an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.  */

#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)	\
  fprintf (FILE, ".%s%d:\n", PREFIX, NUM)

/* This is how to output an internal numbered label which
   labels a jump table.  */

#define ASM_OUTPUT_CASE_LABEL(FILE,PREFIX,NUM,JUMPTABLE)	\
  fprintf (FILE, ".data\n\t.align 4\n.%s%d:\n", PREFIX, NUM)

/* Output at the end of a jump table.  */

#define ASM_OUTPUT_CASE_END(FILE,NUM,INSN)	\
  fprintf (FILE, ".text\n")

/* This is how to store into the string LABEL
   the symbol_ref name of an internal numbered label where
   PREFIX is the class of label and NUM is the number within the class.
   This is suitable for output with `assemble_name'.  */

#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)	\
  sprintf (LABEL, "*.%s%d", PREFIX, NUM)

#define ASCII_DATA_ASM_OP ".byte"
#define	ASM_OUTPUT_ASCII(f, p, size)	\
{ register int i;			\
  int inside;				\
  inside = FALSE;			\
  for (i = 0; i < size; i++) {		\
    if (i % 64 == 0) {			\
      if (i != 0) {			\
	if (inside)			\
	  putc('"', f);			\
	putc('\n', f);			\
	inside = FALSE;			\
      }					\
      fprintf(f, "%s ", ASCII_DATA_ASM_OP);	\
    }					\
    if (p[i] < 32 || p[i] == '\\' || p[i] == '"' || p[i] == 127) {	\
      if (inside) {			\
	putc('"', f);			\
	inside = FALSE;			\
      }					\
      if (i % 64 != 0)			\
	putc(',', f);			\
      fprintf(f, "%d", p[i]);		\
    } else {				\
      if (!inside) {			\
	if (i % 64 != 0)			\
	  putc(',', f);			\
	putc('"', f);			\
	inside = TRUE;			\
      }					\
      putc(p[i], f);			\
    }					\
  }					\
  if (inside)				\
    putc('"', f);			\
  putc('\n', f);			\
}

/* This is how to output an assembler line defining a `double' constant.  */

#define ASM_OUTPUT_DOUBLE(FILE,VALUE)  \
  fprintf (FILE, "\t.double %.20e\n", (VALUE))

/* This is how to output an assembler line defining a `float' constant.  */

#define ASM_OUTPUT_FLOAT(FILE,VALUE)  \
  fprintf (FILE, "\t.float %.12e\n", (VALUE))

/* This is how to output an assembler line defining an `int' constant.  */

#define ASM_OUTPUT_INT(FILE,VALUE)  \
( fprintf (FILE, "\t.long "),			\
  output_addr_const (FILE, (VALUE)),		\
  fprintf (FILE, "\n"))

/* Likewise for `char' and `short' constants.  */

#define ASM_OUTPUT_SHORT(FILE,VALUE)  \
( fprintf (FILE, "\t.short "),			\
  output_addr_const (FILE, (VALUE)),		\
  fprintf (FILE, "\n"))

#define ASM_OUTPUT_CHAR(FILE,VALUE)  \
( fprintf (FILE, "\t.byte "),			\
  output_addr_const (FILE, (VALUE)),		\
  fprintf (FILE, "\n"))

/* This is how to output an assembler line for a numeric constant byte.  */

#define ASM_OUTPUT_BYTE(FILE,VALUE)  \
  fprintf (FILE, "\t.byte 0x%x\n", (VALUE))

/* This is how to output code to push a register on the stack.
   It need not be very fast code.  */

#define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
  fprintf (FILE, "\taddu -16,sp,sp\n\t%sst.l %s,0(sp)\n",	\
	   ((REGNO) < 32 ? "" : "f"), reg_names[REGNO])

/* This is how to output an insn to pop a register from the stack.
   It need not be very fast code.  */

#define ASM_OUTPUT_REG_POP(FILE,REGNO)  \
  fprintf (FILE, "\t%sld.l 0(sp),%s\n\taddu 16,sp,sp\n",	\
	   ((REGNO) < 32 ? "" : "f"), reg_names[REGNO])

/* This is how to output an element of a case-vector that is absolute.  */

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

/* This is how to output an element of a case-vector that is relative.
   (The i860 does not use such vectors,
   but we must define this macro anyway.)  */

#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL)  \
  fprintf (FILE, "\t.word .L%d-.L%d\n", VALUE, REL)

/* 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 %d\n", 1 << (LOG))

#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.blkb %u\n", (SIZE))

/* This says how to output an assembler line
   to define a global common symbol.  */

#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".comm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%u\n", (ROUNDED)))

/* This says how to output an assembler line
   to define a local common symbol.  */

#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".lcomm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%u\n", (ROUNDED)))

/* Store in OUTPUT a string (made with alloca) containing
   an assembler-name for a local static variable named NAME.
   LABELNO is an integer which is different for each call.  */

#define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO)	\
( (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10),	\
  sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)))

/* Define the parentheses used to group arithmetic operations
   in assembler code.  */

#define ASM_OPEN_PAREN "("
#define ASM_CLOSE_PAREN ")"

/* Define results of standard character escape sequences.  */
#define TARGET_BELL 007
#define TARGET_BS 010
#define TARGET_TAB 011
#define TARGET_NEWLINE 012
#define TARGET_VT 013
#define TARGET_FF 014
#define TARGET_CR 015

/* This assumes the compiler is running on a little-endian machine.
   The support for the other case is left for version 2,
   since there is nothing in version 1 to indicate the sex of the host.  */

#define PRINT_OPERAND_EXTRACT_FLOAT(X)					\
      u.i[0] = CONST_DOUBLE_LOW (X); u.i[1] = CONST_DOUBLE_HIGH (X);

/* 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.

   On the i860, the CODE can be `r', meaning this is a register-only operand
   and an immediate zero should be represented as `r0'.
   It can also be `m', meaning this is a memory ref,
   but print its address as a constant.  */

#define PRINT_OPERAND(FILE, X, CODE)  \
{ if (GET_CODE (X) == REG)						\
    fprintf (FILE, "%s", reg_names[REGNO (X)]);				\
  else if ((CODE) == 'm')						\
    output_address (XEXP (X, 0));					\
  else if (GET_CODE (X) == MEM)						\
    output_address (XEXP (X, 0));					\
  else if ((CODE) == 'r' && (X) == const0_rtx)				\
    fprintf (FILE, "r0");						\
  else if ((CODE) == 'r' && (X) == CONST0_RTX (GET_MODE (X)))		\
    fprintf (FILE, "f0");						\
  else if (GET_CODE (X) == CONST_DOUBLE)				\
    {									\
      if (GET_MODE (X) == SFmode)					\
	{ union { double d; int i[2]; } u;				\
	  union { float f; int i; } u1;					\
	  PRINT_OPERAND_EXTRACT_FLOAT (X);				\
	  u1.f = u.d;							\
          fprintf (FILE, "0x%x", u1.i); }				\
      else								\
        abort ();							\
      }									\
  else									\
    output_addr_const (FILE, X); }

/* Print a memory address as an operand to reference that memory location.  */

#define PRINT_OPERAND_ADDRESS(FILE, ADDR)  \
{ register rtx base, index = 0;					\
  int offset = 0;						\
  register rtx addr = ADDR;					\
  if (GET_CODE (addr) == REG)					\
    {								\
      fprintf (FILE, "0(%s)", reg_names[REGNO (addr)]);		\
    }								\
  else if (GET_CODE (addr) == PLUS)				\
    {								\
      if (GET_CODE (XEXP (addr, 0)) == CONST_INT)		\
	offset = INTVAL (XEXP (addr, 0)), base = XEXP (addr, 1);\
      else if (GET_CODE (XEXP (addr, 1)) == CONST_INT)		\
	offset = INTVAL (XEXP (addr, 1)), base = XEXP (addr, 0);\
      else							\
	base = XEXP (addr, 0), index = XEXP (addr, 1);		\
      if (index != 0)						\
	fprintf (FILE, "%s", reg_names[REGNO (index)]);		\
      else							\
	fprintf (FILE, "%d", offset);				\
      fprintf (FILE, "(%s)", reg_names[REGNO (base)]);		\
    }								\
  else								\
    {								\
/* ??? this may be wrong.  */  \
      output_addr_const (FILE, addr);				\
    }								\
}