diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2011-07-28 12:10:29 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2011-07-29 08:25:45 -0500 |
| commit | 789ec7ce20f34b175b3983707e077e8d67385126 (patch) | |
| tree | 73a15cbadf91cfaac068f34a7eee5317ccddec02 /fpu/softfloat-specialize.h | |
| parent | 332ae28dad2d4f155e1ad82bf89a605c2b2710ba (diff) | |
softfloat: change default nan definitions to variables
Most definitions in softfloat.h are really target-independent, but the
file is not because it includes definitions of the default NaN values.
Change those to variables to allow including softfloat.h from files that
are not compiled per-target. By making them const, the compiler is
allowed to optimize them into softfloat functions that use them.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'fpu/softfloat-specialize.h')
| -rw-r--r-- | fpu/softfloat-specialize.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/fpu/softfloat-specialize.h b/fpu/softfloat-specialize.h index c7d35a161d..c165205a49 100644 --- a/fpu/softfloat-specialize.h +++ b/fpu/softfloat-specialize.h @@ -35,6 +35,78 @@ these four paragraphs for those parts of this code that are retained. =============================================================================*/ +#if defined(TARGET_MIPS) || defined(TARGET_SH4) || defined(TARGET_UNICORE32) +#define SNAN_BIT_IS_ONE 1 +#else +#define SNAN_BIT_IS_ONE 0 +#endif + +/*---------------------------------------------------------------------------- +| The pattern for a default generated half-precision NaN. +*----------------------------------------------------------------------------*/ +#if defined(TARGET_ARM) +const float16 float16_default_nan = const_float16(0x7E00); +#elif SNAN_BIT_IS_ONE +const float16 float16_default_nan = const_float16(0x7DFF); +#else +const float16 float16_default_nan = const_float16(0xFE00); +#endif + +/*---------------------------------------------------------------------------- +| The pattern for a default generated single-precision NaN. +*----------------------------------------------------------------------------*/ +#if defined(TARGET_SPARC) +const float32 float32_default_nan = const_float32(0x7FFFFFFF); +#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) +const float32 float32_default_nan = const_float32(0x7FC00000); +#elif SNAN_BIT_IS_ONE +const float32 float32_default_nan = const_float32(0x7FBFFFFF); +#else +const float32 float32_default_nan = const_float32(0xFFC00000); +#endif + +/*---------------------------------------------------------------------------- +| The pattern for a default generated double-precision NaN. +*----------------------------------------------------------------------------*/ +#if defined(TARGET_SPARC) +const float64 float64_default_nan = const_float64(LIT64( 0x7FFFFFFFFFFFFFFF )); +#elif defined(TARGET_PPC) || defined(TARGET_ARM) || defined(TARGET_ALPHA) +const float64 float64_default_nan = const_float64(LIT64( 0x7FF8000000000000 )); +#elif SNAN_BIT_IS_ONE +const float64 float64_default_nan = const_float64(LIT64( 0x7FF7FFFFFFFFFFFF )); +#else +const float64 float64_default_nan = const_float64(LIT64( 0xFFF8000000000000 )); +#endif + +/*---------------------------------------------------------------------------- +| The pattern for a default generated extended double-precision NaN. +*----------------------------------------------------------------------------*/ +#if SNAN_BIT_IS_ONE +#define floatx80_default_nan_high 0x7FFF +#define floatx80_default_nan_low LIT64( 0xBFFFFFFFFFFFFFFF ) +#else +#define floatx80_default_nan_high 0xFFFF +#define floatx80_default_nan_low LIT64( 0xC000000000000000 ) +#endif + +const floatx80 floatx80_default_nan = make_floatx80(floatx80_default_nan_high, + floatx80_default_nan_low); + +/*---------------------------------------------------------------------------- +| The pattern for a default generated quadruple-precision NaN. The `high' and +| `low' values hold the most- and least-significant bits, respectively. +*----------------------------------------------------------------------------*/ +#if SNAN_BIT_IS_ONE +#define float128_default_nan_high LIT64( 0x7FFF7FFFFFFFFFFF ) +#define float128_default_nan_low LIT64( 0xFFFFFFFFFFFFFFFF ) +#else +#define float128_default_nan_high LIT64( 0xFFFF800000000000 ) +#define float128_default_nan_low LIT64( 0x0000000000000000 ) +#endif + +const float128 float128_default_nan = make_float128(float128_default_nan_high, + float128_default_nan_low); + /*---------------------------------------------------------------------------- | Raises the exceptions specified by `flags'. Floating-point traps can be | defined here if desired. It is currently not possible for such a trap |