ia64.h

linux下的gcc编译器

/* Align frames on double word boundaries */
#ifndef IA64_STACK_ALIGN
#define IA64_STACK_ALIGN(LOC) (((LOC) + 15) & ~15)
#endif

#define FUNCTION_BOUNDARY 128

/* Optional x86 80-bit float, quad-precision 128-bit float, and quad-word
   128 bit integers all require 128 bit alignment.  */
#define BIGGEST_ALIGNMENT 128

/* If defined, a C expression to compute the alignment for a static variable.
   TYPE is the data type, and ALIGN is the alignment that the object
   would ordinarily have.  The value of this macro is used instead of that
   alignment to align the object.  */

#define DATA_ALIGNMENT(TYPE, ALIGN)		\
  (TREE_CODE (TYPE) == ARRAY_TYPE		\
   && TYPE_MODE (TREE_TYPE (TYPE)) == QImode	\
   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))

/* If defined, a C expression to compute the alignment given to a constant that
   is being placed in memory.  CONSTANT is the constant and ALIGN is the
   alignment that the object would ordinarily have.  The value of this macro is
   used instead of that alignment to align the object.  */

#define CONSTANT_ALIGNMENT(EXP, ALIGN)  \
  (TREE_CODE (EXP) == STRING_CST	\
   && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))

#define STRICT_ALIGNMENT 1

/* Define this if you wish to imitate the way many other C compilers handle
   alignment of bitfields and the structures that contain them.
   The behavior is that the type written for a bit-field (`int', `short', or
   other integer type) imposes an alignment for the entire structure, as if the
   structure really did contain an ordinary field of that type.  In addition,
   the bit-field is placed within the structure so that it would fit within such
   a field, not crossing a boundary for it.  */
#define PCC_BITFIELD_TYPE_MATTERS 1

/* An integer expression for the size in bits of the largest integer machine
   mode that should actually be used.  */

/* Allow pairs of registers to be used, which is the intent of the default.  */
#define MAX_FIXED_MODE_SIZE GET_MODE_BITSIZE (TImode)

/* By default, the C++ compiler will use function addresses in the
   vtable entries.  Setting this nonzero tells the compiler to use
   function descriptors instead.  The value of this macro says how
   many words wide the descriptor is (normally 2).  It is assumed
   that the address of a function descriptor may be treated as a
   pointer to a function.

   For reasons known only to HP, the vtable entries (as opposed to
   normal function descriptors) are 16 bytes wide in 32-bit mode as
   well, even though the 3rd and 4th words are unused.  */
#define TARGET_VTABLE_USES_DESCRIPTORS (TARGET_ILP32 ? 4 : 2)

/* Due to silliness in the HPUX linker, vtable entries must be
   8-byte aligned even in 32-bit mode.  Rather than create multiple
   ABIs, force this restriction on everyone else too.  */
#define TARGET_VTABLE_ENTRY_ALIGN  64

/* Due to the above, we need extra padding for the data entries below 0
   to retain the alignment of the descriptors.  */
#define TARGET_VTABLE_DATA_ENTRY_DISTANCE (TARGET_ILP32 ? 2 : 1)

/* Layout of Source Language Data Types */

#define INT_TYPE_SIZE 32

#define SHORT_TYPE_SIZE 16

#define LONG_TYPE_SIZE (TARGET_ILP32 ? 32 : 64)

#define MAX_LONG_TYPE_SIZE 64

#define LONG_LONG_TYPE_SIZE 64

#define FLOAT_TYPE_SIZE 32

#define DOUBLE_TYPE_SIZE 64

#define LONG_DOUBLE_TYPE_SIZE 128

/* By default we use the 80-bit Intel extended float format packaged
   in a 128-bit entity.  */
#define INTEL_EXTENDED_IEEE_FORMAT 1

#define DEFAULT_SIGNED_CHAR 1

/* A C expression for a string describing the name of the data type to use for
   size values.  The typedef name `size_t' is defined using the contents of the
   string.  */
/* ??? Needs to be defined for P64 code.  */
/* #define SIZE_TYPE */

/* A C expression for a string describing the name of the data type to use for
   the result of subtracting two pointers.  The typedef name `ptrdiff_t' is
   defined using the contents of the string.  See `SIZE_TYPE' above for more
   information.  */
/* ??? Needs to be defined for P64 code.  */
/* #define PTRDIFF_TYPE */

/* A C expression for a string describing the name of the data type to use for
   wide characters.  The typedef name `wchar_t' is defined using the contents
   of the string.  See `SIZE_TYPE' above for more information.  */
/* #define WCHAR_TYPE */

/* A C expression for the size in bits of the data type for wide characters.
   This is used in `cpp', which cannot make use of `WCHAR_TYPE'.  */
/* #define WCHAR_TYPE_SIZE */


/* Register Basics */

/* Number of hardware registers known to the compiler.
   We have 128 general registers, 128 floating point registers,
   64 predicate registers, 8 branch registers, one frame pointer,
   and several "application" registers.  */

#define FIRST_PSEUDO_REGISTER 334

/* Ranges for the various kinds of registers.  */
#define ADDL_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 3)
#define GR_REGNO_P(REGNO) ((unsigned HOST_WIDE_INT) (REGNO) <= 127)
#define FR_REGNO_P(REGNO) ((REGNO) >= 128 && (REGNO) <= 255)
#define PR_REGNO_P(REGNO) ((REGNO) >= 256 && (REGNO) <= 319)
#define BR_REGNO_P(REGNO) ((REGNO) >= 320 && (REGNO) <= 327)
#define GENERAL_REGNO_P(REGNO) \
  (GR_REGNO_P (REGNO) || (REGNO) == FRAME_POINTER_REGNUM)

#define GR_REG(REGNO) ((REGNO) + 0)
#define FR_REG(REGNO) ((REGNO) + 128)
#define PR_REG(REGNO) ((REGNO) + 256)
#define BR_REG(REGNO) ((REGNO) + 320)
#define OUT_REG(REGNO) ((REGNO) + 120)
#define IN_REG(REGNO) ((REGNO) + 112)
#define LOC_REG(REGNO) ((REGNO) + 32)

#define AR_CCV_REGNUM	329
#define AR_UNAT_REGNUM  330
#define AR_PFS_REGNUM	331
#define AR_LC_REGNUM	332
#define AR_EC_REGNUM	333

#define IN_REGNO_P(REGNO) ((REGNO) >= IN_REG (0) && (REGNO) <= IN_REG (7))
#define LOC_REGNO_P(REGNO) ((REGNO) >= LOC_REG (0) && (REGNO) <= LOC_REG (79))
#define OUT_REGNO_P(REGNO) ((REGNO) >= OUT_REG (0) && (REGNO) <= OUT_REG (7))

#define AR_M_REGNO_P(REGNO) ((REGNO) == AR_CCV_REGNUM \
			     || (REGNO) == AR_UNAT_REGNUM)
#define AR_I_REGNO_P(REGNO) ((REGNO) >= AR_PFS_REGNUM \
			     && (REGNO) < FIRST_PSEUDO_REGISTER)
#define AR_REGNO_P(REGNO) ((REGNO) >= AR_CCV_REGNUM \
			   && (REGNO) < FIRST_PSEUDO_REGISTER)


/* ??? Don't really need two sets of macros.  I like this one better because
   it is less typing.  */
#define R_GR(REGNO) GR_REG (REGNO)
#define R_FR(REGNO) FR_REG (REGNO)
#define R_PR(REGNO) PR_REG (REGNO)
#define R_BR(REGNO) BR_REG (REGNO)

/* An initializer that says which registers are used for fixed purposes all
   throughout the compiled code and are therefore not available for general
   allocation.

   r0: constant 0
   r1: global pointer (gp)
   r12: stack pointer (sp)
   r13: thread pointer (tp)
   f0: constant 0.0
   f1: constant 1.0
   p0: constant true
   fp: eliminable frame pointer */

/* The last 16 stacked regs are reserved for the 8 input and 8 output
   registers.  */

#define FIXED_REGISTERS \
{ /* General registers.  */				\
  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  /* Floating-point registers.  */			\
  1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  /* Predicate registers.  */				\
  1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  /* Branch registers.  */				\
  0, 0, 0, 0, 0, 0, 0, 0,				\
  /*FP CCV UNAT PFS LC EC */				\
     1,  1,   1,  1, 0, 1				\
 }

/* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered
   (in general) by function calls as well as for fixed registers.  This
   macro therefore identifies the registers that are not available for
   general allocation of values that must live across function calls.  */

#define CALL_USED_REGISTERS \
{ /* General registers.  */				\
  1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1,	\
  /* Floating-point registers.  */			\
  1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  /* Predicate registers.  */				\
  1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  /* Branch registers.  */				\
  1, 0, 0, 0, 0, 0, 1, 1,				\
  /*FP CCV UNAT PFS LC EC */				\
     1,  1,   1,  1, 0, 1				\
}

/* Like `CALL_USED_REGISTERS' but used to overcome a historical
   problem which makes CALL_USED_REGISTERS *always* include
   all the FIXED_REGISTERS.  Until this problem has been
   resolved this macro can be used to overcome this situation.
   In particular, block_propagate() requires this list
   be acurate, or we can remove registers which should be live.
   This macro is used in regs_invalidated_by_call.  */

#define CALL_REALLY_USED_REGISTERS \
{ /* General registers.  */				\
  1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1,	\
  /* Floating-point registers.  */			\
  1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  /* Predicate registers.  */				\
  1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,	\
  /* Branch registers.  */				\
  1, 0, 0, 0, 0, 0, 1, 1,				\
  /*FP CCV UNAT PFS LC EC */				\
     0,  1,   0,  1, 0, 0				\
}


/* Define this macro if the target machine has register windows.  This C
   expression returns the register number as seen by the called function
   corresponding to the register number OUT as seen by the calling function.
   Return OUT if register number OUT is not an outbound register.  */

#define INCOMING_REGNO(OUT) \
  ((unsigned) ((OUT) - OUT_REG (0)) < 8 ? IN_REG ((OUT) - OUT_REG (0)) : (OUT))

/* Define this macro if the target machine has register windows.  This C
   expression returns the register number as seen by the calling function
   corresponding to the register number IN as seen by the called function.
   Return IN if register number IN is not an inbound register.  */

#define OUTGOING_REGNO(IN) \
  ((unsigned) ((IN) - IN_REG (0)) < 8 ? OUT_REG ((IN) - IN_REG (0)) : (IN))

/* Define this macro if the target machine has register windows.  This
   C expression returns true if the register is call-saved but is in the
   register window.  */

#define LOCAL_REGNO(REGNO) \
  (IN_REGNO_P (REGNO) || LOC_REGNO_P (REGNO))

/* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
   return the mode to be used for the comparison.  Must be defined if
   EXTRA_CC_MODES is defined.  */

#define SELECT_CC_MODE(OP,X,Y)  CCmode

/* Order of allocation of registers */

/* If defined, an initializer for a vector of integers, containing the numbers
   of hard registers in the order in which GNU CC should prefer to use them
   (from most preferred to least).

   If this macro is not defined, registers are used lowest numbered first (all
   else being equal).

   One use of this macro is on machines where the highest numbered registers