i960.h

GUN开源阻止下的编译器GCC

   (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

/* Use memcpy, etc. instead of bcopy.  */

#ifndef WIND_RIVER
#define	TARGET_MEM_FUNCTIONS	1
#endif

/* 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.  */

/* Constants that can be (non-ldconst) insn operands are cost 0.  Constants
   that can be non-ldconst operands in rare cases are cost 1.  Other constants
   have higher costs.  */

#define CONST_COSTS(RTX, CODE, OUTER_CODE)				\
  case CONST_INT:							\
    if ((INTVAL (RTX) >= 0 && INTVAL (RTX) < 32)			\
	|| power2_operand (RTX, VOIDmode))				\
      return 0; 							\
    else if (INTVAL (RTX) >= -31 && INTVAL (RTX) < 0)			\
      return 1;								\
  case CONST:								\
  case LABEL_REF:							\
  case SYMBOL_REF:							\
    return (TARGET_FLAG_C_SERIES ? 6 : 8);				\
  case CONST_DOUBLE:							\
    if ((RTX) == CONST0_RTX (DFmode) || (RTX) == CONST0_RTX (SFmode)	\
	|| (RTX) == CONST1_RTX (DFmode) || (RTX) == CONST1_RTX (SFmode))\
      return 1;								\
    return 12;

/* The i960 offers addressing modes which are "as cheap as a register".
   See i960.c (or gcc.texinfo) for details.  */

#define ADDRESS_COST(RTX) \
  (GET_CODE (RTX) == REG ? 1 : i960_address_cost (RTX))

/* Control the assembler format that we output.  */

/* Output at beginning of assembler file.  */

#define ASM_FILE_START(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 {						\
	"g0", "g1", "g2",  "g3",  "g4",  "g5",  "g6",  "g7",		\
	"g8", "g9", "g10", "g11", "g12", "g13", "g14", "fp",		\
	"pfp","sp", "rip", "r3",  "r4",  "r5",  "r6",  "r7",		\
	"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",		\
	"fp0","fp1","fp2", "fp3", "cc", "fake" }

/* How to renumber registers for dbx and gdb.
   In the 960 encoding, g0..g15 are registers 16..31.  */

#define DBX_REGISTER_NUMBER(REGNO)					\
  (((REGNO) < 16) ? (REGNO) + 16					\
   : (((REGNO) > 31) ? (REGNO) : (REGNO) - 16))

/* Don't emit dbx records longer than this.  This is an arbitrary value.  */
#define DBX_CONTIN_LENGTH 1500

/* This is how to output a note to DBX telling it the line number
   to which the following sequence of instructions corresponds. */

#define ASM_OUTPUT_SOURCE_LINE(FILE, LINE)			\
{ if (write_symbols == SDB_DEBUG) {				\
    fprintf ((FILE), "\t.ln	%d\n",				\
	     (sdb_begin_function_line				\
	      ? (LINE) - sdb_begin_function_line : 1));		\
  } else if (write_symbols == DBX_DEBUG) {			\
	fprintf((FILE),"\t.stabd	68,0,%d\n",(LINE));	\
  } }

/* 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)

/* 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)		\
{ fputs ("\t.globl ", FILE);			\
  assemble_name (FILE, NAME);			\
  fputs ("\n", FILE); }

/* 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 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)

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

#define ASM_OUTPUT_LONG_DOUBLE(FILE,VALUE) i960_output_long_double(FILE, VALUE)

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

#define ASM_OUTPUT_DOUBLE(FILE,VALUE)  i960_output_double(FILE, VALUE)

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

#define ASM_OUTPUT_FLOAT(FILE,VALUE)  i960_output_float(FILE, VALUE)

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

#define ASM_OUTPUT_INT(FILE,VALUE)  \
( fprintf (FILE, "\t.word "),			\
  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))

#define ASM_OUTPUT_REG_PUSH(FILE,REGNO)  \
  fprintf (FILE, "\tst\t%s,(sp)\n\taddo\t4,sp,sp\n", 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, "\tsubo\t4,sp,sp\n\tld\t(sp),%s\n", 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.word L%d\n", VALUE)

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

#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)	\
  fprintf (FILE, "\t.align %d\n", (LOG))

#define ASM_OUTPUT_SKIP(FILE,SIZE)  \
  fprintf (FILE, "\t.space %d\n", (SIZE))

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

/* For common objects, output unpadded size... gld960 & lnk960 both
   have code to align each common object at link time.  Also, if size
   is 0, treat this as a declaration, not a definition - i.e.,
   do nothing at all.  */

#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)	\
{ if ((SIZE) != 0)					\
    {							\
      fputs (".globl ", (FILE)),			\
      assemble_name ((FILE), (NAME)),			\
      fputs ("\n.comm ", (FILE)),			\
      assemble_name ((FILE), (NAME)),			\
      fprintf ((FILE), ",%d\n", (SIZE));		\
    }							\
}

/* This says how to output an assembler line to define a local common symbol.
   Output unpadded size, with request to linker to align as requested.
   0 size should not be possible here.  */

#define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)  \
( fputs (".bss\t", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%d,%d\n", (SIZE),		\
	   ((ALIGN) <= 8 ? 0			\
	    : ((ALIGN) <= 16 ? 1		\
	       : ((ALIGN) <= 32 ? 2		\
		  : ((ALIGN <= 64 ? 3 : 4)))))))

/* Output text for an #ident directive.  */
#define	ASM_OUTPUT_IDENT(FILE, STR)  fprintf(FILE, "\t# %s\n", STR);

/* Align code to 8 byte boundary if TARGET_CODE_ALIGN is true.  */

#define	ASM_OUTPUT_ALIGN_CODE(FILE)		\
{ if (TARGET_CODE_ALIGN) fputs("\t.align 3\n",FILE); }

/* 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

/* Output assembler code to FILE to initialize this source file's
   basic block profiling info, if that has not already been done.  */

#define FUNCTION_BLOCK_PROFILER(FILE, LABELNO) \
{ fprintf (FILE, "\tld	LPBX0,g12\n");			\
  fprintf (FILE, "\tcmpobne	0,g12,LPY%d\n",LABELNO);\
  fprintf (FILE, "\tlda	LPBX0,g12\n");			\
  fprintf (FILE, "\tcall	___bb_init_func\n");	\
  fprintf (FILE, "LPY%d:\n",LABELNO); }

/* Output assembler code to FILE to increment the entry-count for
   the BLOCKNO'th basic block in this source file.  */

#define BLOCK_PROFILER(FILE, BLOCKNO) \
{ int blockn = (BLOCKNO);				\
  fprintf (FILE, "\tld	LPBX2+%d,g12\n", 4 * blockn);	\
  fprintf (FILE, "\taddo	g12,1,g12\n");		\
  fprintf (FILE, "\tst	g12,LPBX2+%d\n", 4 * blockn); }

/* 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(FILE, X, CODE)  \
  i960_print_operand (FILE, X, CODE);

/* Print a memory address as an operand to reference that memory location.  */

#define PRINT_OPERAND_ADDRESS(FILE, ADDR)	\
  i960_print_operand_addr (FILE, ADDR)

/* Output assembler code for a block containing the constant parts
   of a trampoline, leaving space for the variable parts.  */

/* On the i960, the trampoline contains three instructions:
     ldconst _function, r4
     ldconst static addr, r3
     jump (r4)  */

#define TRAMPOLINE_TEMPLATE(FILE)					\
{									\
  ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x8C203000));	\
  ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));	\
  ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x8C183000));	\
  ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x00000000));	\
  ASM_OUTPUT_INT (FILE, gen_rtx (CONST_INT, VOIDmode, 0x84212000));	\
}

/* Length in units of the trampoline for entering a nested function.  */

#define TRAMPOLINE_SIZE 20

/* Emit RTL insns to initialize the variable parts of a trampoline.
   FNADDR is an RTX for the address of the function's pure code.
   CXT is an RTX for the static chain value for the function.  */

#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)			\
{									\
  emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)),	\
		  FNADDR);						\
  emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 12)),	\
		  CXT);							\
}

#if 0
/* Promote char and short arguments to ints, when want compatibility with
   the iC960 compilers.  */

/* ??? In order for this to work, all users would need to be changed
   to test the value of the macro at run time.  */
#define PROMOTE_PROTOTYPES	TARGET_CLEAN_LINKAGE
/* ??? This does not exist.  */
#define PROMOTE_RETURN		TARGET_CLEAN_LINKAGE
#endif

/* Instruction type definitions.  Used to alternate instructions types for
   better performance on the C series chips.  */

enum insn_types { I_TYPE_REG, I_TYPE_MEM, I_TYPE_CTRL };

/* Holds the insn type of the last insn output to the assembly file.  */

extern enum insn_types i960_last_insn_type;

/* Parse opcodes, and set the insn last insn type based on them.  */

#define ASM_OUTPUT_OPCODE(FILE, INSN)	i960_scan_opcode (INSN)

/* Table listing what rtl codes each predicate in i960.c will accept.  */

#define PREDICATE_CODES \
  {"fpmove_src_operand", {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF,	\
			  LABEL_REF, SUBREG, REG, MEM}},		\
  {"arith_operand", {SUBREG, REG, CONST_INT}},				\
  {"fp_arith_operand", {SUBREG, REG, CONST_DOUBLE}},			\
  {"signed_arith_operand", {SUBREG, REG, CONST_INT}},			\
  {"literal", {CONST_INT}},						\
  {"fp_literal_one", {CONST_DOUBLE}},					\
  {"fp_literal_double", {CONST_DOUBLE}},				\
  {"fp_literal", {CONST_DOUBLE}},					\
  {"signed_literal", {CONST_INT}},					\
  {"symbolic_memory_operand", {SUBREG, MEM}},				\
  {"eq_or_neq", {EQ, NE}},						\
  {"arith32_operand", {SUBREG, REG, LABEL_REF, SYMBOL_REF, CONST_INT,	\
		       CONST_DOUBLE, CONST}},				\
  {"power2_operand", {CONST_INT}},					\
  {"cmplpower2_operand", {CONST_INT}},

/* Define functions in i960.c and used in insn-output.c.  */

extern char *i960_output_ldconst ();
extern char *i960_output_call_insn ();
extern char *i960_output_ret_insn ();

/* Defined in reload.c, and used in insn-recog.c.  */

extern int rtx_equal_function_value_matters;