sparc.h

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#define MASK_EPILOGUE 2
#define TARGET_EPILOGUE (target_flags & MASK_EPILOGUE)

/* Nonzero if we should assume that double pointers might be unaligned.
   This can happen when linking gcc compiled code with other compilers,
   because the ABI only guarantees 4 byte alignment.  */
#define MASK_UNALIGNED_DOUBLES 4
#define TARGET_UNALIGNED_DOUBLES (target_flags & MASK_UNALIGNED_DOUBLES)

/* Nonzero means that we should generate code for a v8 sparc.  */
#define MASK_V8 0x8
#define TARGET_V8 (target_flags & MASK_V8)

/* Nonzero means that we should generate code for a sparclite.
   This enables the sparclite specific instructions, but does not affect
   whether FPU instructions are emitted.  */
#define MASK_SPARCLITE 0x10
#define TARGET_SPARCLITE (target_flags & MASK_SPARCLITE)

/* Nonzero if we're compiling for the sparclet.  */
#define MASK_SPARCLET 0x20
#define TARGET_SPARCLET (target_flags & MASK_SPARCLET)

/* Nonzero if we're compiling for v9 sparc.
   Note that v9's can run in 32 bit mode so this doesn't necessarily mean
   the word size is 64.  */
#define MASK_V9 0x40
#define TARGET_V9 (target_flags & MASK_V9)

/* Non-zero to generate code that uses the instructions deprecated in
   the v9 architecture.  This option only applies to v9 systems.  */
/* ??? This isn't user selectable yet.  It's used to enable such insns
   on 32 bit v9 systems and for the moment they're permanently disabled
   on 64 bit v9 systems.  */
#define MASK_DEPRECATED_V8_INSNS 0x80
#define TARGET_DEPRECATED_V8_INSNS (target_flags & MASK_DEPRECATED_V8_INSNS)

/* Mask of all CPU selection flags.  */
#define MASK_ISA \
(MASK_V8 + MASK_SPARCLITE + MASK_SPARCLET + MASK_V9 + MASK_DEPRECATED_V8_INSNS)

/* Non-zero means don't pass `-assert pure-text' to the linker.  */
#define MASK_IMPURE_TEXT 0x100
#define TARGET_IMPURE_TEXT (target_flags & MASK_IMPURE_TEXT)

/* Nonzero means that we should generate code using a flat register window
   model, i.e. no save/restore instructions are generated, which is
   compatible with normal sparc code.
   The frame pointer is %i7 instead of %fp.  */
#define MASK_FLAT 0x200
#define TARGET_FLAT (target_flags & MASK_FLAT)

/* Nonzero means use the registers that the Sparc ABI reserves for
   application software.  This must be the default to coincide with the
   setting in FIXED_REGISTERS.  */
#define MASK_APP_REGS 0x400
#define TARGET_APP_REGS (target_flags & MASK_APP_REGS)

/* Option to select how quad word floating point is implemented.
   When TARGET_HARD_QUAD is true, we use the hardware quad instructions.
   Otherwise, we use the SPARC ABI quad library functions.  */
#define MASK_HARD_QUAD 0x800
#define TARGET_HARD_QUAD (target_flags & MASK_HARD_QUAD)

/* Non-zero on little-endian machines.  */
/* ??? Little endian support currently only exists for sparclet-aout and
   sparc64-elf configurations.  May eventually want to expand the support
   to all targets, but for now it's kept local to only those two.  */
#define MASK_LITTLE_ENDIAN 0x1000
#define TARGET_LITTLE_ENDIAN (target_flags & MASK_LITTLE_ENDIAN)

/* 0x2000, 0x4000 are unused */

/* Nonzero if pointers are 64 bits.
   This is not a user selectable option, though it may be one day -
   so it is used to determine pointer size instead of an architecture flag.  */
#define MASK_PTR64 0x8000
#define TARGET_PTR64 (target_flags & MASK_PTR64)

/* Nonzero if generating code to run in a 64 bit environment.
   This is intended to only be used by TARGET_ARCH{32,64} as they are the
   mechanism used to control compile time or run time selection.  */
#define MASK_64BIT 0x10000
#define TARGET_64BIT (target_flags & MASK_64BIT)

/* 0x20000,0x40000 unused */

/* Non-zero means use a stack bias of 2047.  Stack offsets are obtained by
   adding 2047 to %sp.  This option is for v9 only and is the default.  */
#define MASK_STACK_BIAS 0x80000
#define TARGET_STACK_BIAS (target_flags & MASK_STACK_BIAS)

/* Non-zero means %g0 is a normal register.
   We still clobber it as necessary, but we can't rely on it always having
   a zero value.
   We don't bother to support this in true 64 bit mode.  */
#define MASK_LIVE_G0 0x100000
#define TARGET_LIVE_G0 (target_flags & MASK_LIVE_G0)

/* Non-zero means the cpu has broken `save' and `restore' insns, only
   the trivial versions work (save %g0,%g0,%g0; restore %g0,%g0,%g0).
   We assume the environment will properly handle or otherwise avoid
   trouble associated with an interrupt occurring after the `save' or trap
   occurring during it.  */
#define MASK_BROKEN_SAVERESTORE 0x200000
#define TARGET_BROKEN_SAVERESTORE (target_flags & MASK_BROKEN_SAVERESTORE)

/* Non-zero means -m{,no-}fpu was passed on the command line.  */
#define MASK_FPU_SET 0x400000
#define TARGET_FPU_SET (target_flags & MASK_FPU_SET)

/* Macro to define tables used to set the flags.
   This is a list in braces of pairs in braces,
   each pair being { "NAME", VALUE }
   where VALUE is the bits to set or minus the bits to clear.
   An empty string NAME is used to identify the default VALUE.  */

#define TARGET_SWITCHES  \
  { {"fpu", MASK_FPU | MASK_FPU_SET},	\
    {"no-fpu", -MASK_FPU},		\
    {"no-fpu", MASK_FPU_SET},		\
    {"hard-float", MASK_FPU | MASK_FPU_SET}, \
    {"soft-float", -MASK_FPU},		\
    {"soft-float", MASK_FPU_SET},	\
    {"epilogue", MASK_EPILOGUE},	\
    {"no-epilogue", -MASK_EPILOGUE},	\
    {"unaligned-doubles", MASK_UNALIGNED_DOUBLES}, \
    {"no-unaligned-doubles", -MASK_UNALIGNED_DOUBLES}, \
    {"impure-text", MASK_IMPURE_TEXT},	\
    {"no-impure-text", -MASK_IMPURE_TEXT}, \
    {"flat", MASK_FLAT},		\
    {"no-flat", -MASK_FLAT},		\
    {"app-regs", MASK_APP_REGS},	\
    {"no-app-regs", -MASK_APP_REGS},	\
    {"hard-quad-float", MASK_HARD_QUAD}, \
    {"soft-quad-float", -MASK_HARD_QUAD}, \
    /* ??? These are deprecated, coerced to -mcpu=.  Delete in 2.9.  */ \
    {"cypress", 0},			\
    {"sparclite", 0},			\
    {"f930", 0},			\
    {"f934", 0},			\
    {"v8", 0},				\
    {"supersparc", 0},			\
    /* End of deprecated options.  */	\
    /* -mptrNN exists for *experimental* purposes.  */ \
/*  {"ptr64", MASK_PTR64}, */		\
/*  {"ptr32", -MASK_PTR64}, */		\
    {"32", -MASK_64BIT},		\
    {"64", MASK_64BIT},			\
    {"stack-bias", MASK_STACK_BIAS},	\
    {"no-stack-bias", -MASK_STACK_BIAS}, \
    SUBTARGET_SWITCHES			\
    { "", TARGET_DEFAULT}}

/* MASK_APP_REGS must always be the default because that's what
   FIXED_REGISTERS is set to and -ffixed- is processed before
   CONDITIONAL_REGISTER_USAGE is called (where we process -mno-app-regs).  */
#define TARGET_DEFAULT (MASK_APP_REGS + MASK_EPILOGUE + MASK_FPU)

/* This is meant to be redefined in target specific files.  */
#define SUBTARGET_SWITCHES

/* Processor type.
   These must match the values for the cpu attribute in sparc.md.  */
enum processor_type {
  PROCESSOR_V7,
  PROCESSOR_CYPRESS,
  PROCESSOR_V8,
  PROCESSOR_SUPERSPARC,
  PROCESSOR_SPARCLITE,
  PROCESSOR_F930,
  PROCESSOR_F934,
  PROCESSOR_SPARCLET,
  PROCESSOR_TSC701,
  PROCESSOR_V8PLUS,
  PROCESSOR_V9,
  PROCESSOR_ULTRASPARC
};

/* This is set from -m{cpu,tune}=xxx.  */
extern enum processor_type sparc_cpu;

/* Recast the cpu class to be the cpu attribute.
   Every file includes us, but not every file includes insn-attr.h.  */
#define sparc_cpu_attr ((enum attr_cpu) sparc_cpu)

/* This macro is similar to `TARGET_SWITCHES' but defines names of
   command options that have values.  Its definition is an
   initializer with a subgrouping for each command option.

   Each subgrouping contains a string constant, that defines the
   fixed part of the option name, and the address of a variable. 
   The variable, type `char *', is set to the variable part of the
   given option if the fixed part matches.  The actual option name
   is made by appending `-m' to the specified name.

   Here is an example which defines `-mshort-data-NUMBER'.  If the
   given option is `-mshort-data-512', the variable `m88k_short_data'
   will be set to the string `"512"'.

	extern char *m88k_short_data;
	#define TARGET_OPTIONS { { "short-data-", &m88k_short_data } }  */

#define TARGET_OPTIONS \
{							\
  { "cpu=",  &sparc_select[1].string },			\
  { "tune=", &sparc_select[2].string },			\
  { "cmodel=", &sparc_cmodel_string },			\
  { "align-loops=",	&sparc_align_loops_string },	\
  { "align-jumps=",	&sparc_align_jumps_string },	\
  { "align-functions=",	&sparc_align_funcs_string },	\
  SUBTARGET_OPTIONS 					\
}

/* This is meant to be redefined in target specific files.  */
#define SUBTARGET_OPTIONS

/* sparc_select[0] is reserved for the default cpu.  */
struct sparc_cpu_select
{
  char *string;
  char *name;
  int set_tune_p;
  int set_arch_p;
};

extern struct sparc_cpu_select sparc_select[];

/* Variables to record values the user passes.  */
extern char *sparc_align_loops_string;
extern char *sparc_align_jumps_string;
extern char *sparc_align_funcs_string;
/* Parsed values as a power of two.  */
extern int sparc_align_loops;
extern int sparc_align_jumps;
extern int sparc_align_funcs;

#define DEFAULT_SPARC_ALIGN_FUNCS \
(sparc_cpu == PROCESSOR_ULTRASPARC ? 5 : 2)

/* target machine storage layout */

/* Define for cross-compilation to a sparc target with no TFmode from a host
   with a different float format (e.g. VAX).  */
#define REAL_ARITHMETIC

/* Define this if most significant bit is lowest numbered
   in instructions that operate on numbered bit-fields.  */
#define BITS_BIG_ENDIAN 1

/* Define this if most significant byte of a word is the lowest numbered.  */
#define BYTES_BIG_ENDIAN 1

/* Define this if most significant word of a multiword number is the lowest
   numbered.  */
#define WORDS_BIG_ENDIAN 1

/* Define this to set the endianness to use in libgcc2.c, which can
   not depend on target_flags.  */
#if defined (__LITTLE_ENDIAN__)
#define LIBGCC2_WORDS_BIG_ENDIAN 0
#else
#define LIBGCC2_WORDS_BIG_ENDIAN 1
#endif

/* number of bits in an addressable storage unit */
#define BITS_PER_UNIT 8

/* Width in bits of a "word", which is the contents of a machine register.
   Note that this is not necessarily the width of data type `int';
   if using 16-bit ints on a 68000, this would still be 32.
   But on a machine with 16-bit registers, this would be 16.  */
#define BITS_PER_WORD		(TARGET_ARCH64 ? 64 : 32)
#define MAX_BITS_PER_WORD	64

/* Width of a word, in units (bytes).  */
#define UNITS_PER_WORD		(TARGET_ARCH64 ? 8 : 4)
#define MIN_UNITS_PER_WORD	4

/* Now define the sizes of the C data types.  */

#define SHORT_TYPE_SIZE		16
#define INT_TYPE_SIZE		32
#define LONG_TYPE_SIZE		(TARGET_ARCH64 ? 64 : 32)
#define LONG_LONG_TYPE_SIZE	64
#define FLOAT_TYPE_SIZE		32
#define DOUBLE_TYPE_SIZE	64

#if defined (SPARC_BI_ARCH)
#define MAX_LONG_TYPE_SIZE	64
#endif

#if 0
/* ??? This does not work in SunOS 4.x, so it is not enabled here.
   Instead, it is enabled in sol2.h, because it does work under Solaris.  */
/* Define for support of TFmode long double and REAL_ARITHMETIC.
   Sparc ABI says that long double is 4 words.  */
#define LONG_DOUBLE_TYPE_SIZE 128
#endif

/* Width in bits of a pointer.
   See also the macro `Pmode' defined below.  */
#define POINTER_SIZE (TARGET_PTR64 ? 64 : 32)

/* A macro to update MODE and UNSIGNEDP when an object whose type
   is TYPE and which has the specified mode and signedness is to be
   stored in a register.  This macro is only called when TYPE is a
   scalar type.  */
#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
if (TARGET_ARCH64				\
    && GET_MODE_CLASS (MODE) == MODE_INT	\
    && GET_MODE_SIZE (MODE) < UNITS_PER_WORD)	\
{						\
  (MODE) = DImode;				\
}

/* Define this macro if the promotion described by PROMOTE_MODE
   should also be done for outgoing function arguments.  */
/* This is only needed for TARGET_ARCH64, but since PROMOTE_MODE is a no-op
   for TARGET_ARCH32 this is ok.  Otherwise we'd need to add a runtime test
   for this value.  */
#define PROMOTE_FUNCTION_ARGS

/* Define this macro if the promotion described by PROMOTE_MODE
   should also be done for the return value of functions.
   If this macro is defined, FUNCTION_VALUE must perform the same
   promotions done by PROMOTE_MODE.  */
/* This is only needed for TARGET_ARCH64, but since PROMOTE_MODE is a no-op
   for TARGET_ARCH32 this is ok.  Otherwise we'd need to add a runtime test
   for this value.  */
#define PROMOTE_FUNCTION_RETURN

/* Allocation boundary (in *bits*) for storing arguments in argument list.  */
#define PARM_BOUNDARY (TARGET_ARCH64 ? 64 : 32)

/* Boundary (in *bits*) on which stack pointer should be aligned.  */
#define STACK_BOUNDARY (TARGET_ARCH64 ? 128 : 64)

/* ALIGN FRAMES on double word boundaries */