diff options
Diffstat (limited to 'fpu/softfloat.h')
| -rw-r--r-- | fpu/softfloat.h | 41 |
1 files changed, 37 insertions, 4 deletions
diff --git a/fpu/softfloat.h b/fpu/softfloat.h index f344d2ea5..5f95d061e 100644 --- a/fpu/softfloat.h +++ b/fpu/softfloat.h @@ -111,8 +111,31 @@ enum { /*---------------------------------------------------------------------------- | Software IEC/IEEE floating-point types. *----------------------------------------------------------------------------*/ +/* Use structures for soft-float types. This prevents accidentally mixing + them with native int/float types. A sufficiently clever compiler and + sane ABI should be able to see though these structs. However + x86/gcc 3.x seems to struggle a bit, so leave them disabled by default. */ +//#define USE_SOFTFLOAT_STRUCT_TYPES +#ifdef USE_SOFTFLOAT_STRUCT_TYPES +typedef struct { + uint32_t v; +} float32; +/* The cast ensures an error if the wrong type is passed. */ +#define float32_val(x) (((float32)(x)).v) +#define make_float32(x) __extension__ ({ float32 f32_val = {x}; f32_val; }) +typedef struct { + uint64_t v; +} float64; +#define float64_val(x) (((float64)(x)).v) +#define make_float64(x) __extension__ ({ float64 f64_val = {x}; f64_val; }) +#else typedef uint32_t float32; typedef uint64_t float64; +#define float32_val(x) (x) +#define float64_val(x) (x) +#define make_float32(x) (x) +#define make_float64(x) (x) +#endif #ifdef FLOATX80 typedef struct { uint64_t low; @@ -244,17 +267,20 @@ int float32_compare( float32, float32 STATUS_PARAM ); int float32_compare_quiet( float32, float32 STATUS_PARAM ); int float32_is_nan( float32 ); int float32_is_signaling_nan( float32 ); +float32 float32_scalbn( float32, int STATUS_PARAM ); INLINE float32 float32_abs(float32 a) { - return a & 0x7fffffff; + return make_float32(float32_val(a) & 0x7fffffff); } INLINE float32 float32_chs(float32 a) { - return a ^ 0x80000000; + return make_float32(float32_val(a) ^ 0x80000000); } +#define float32_zero make_float32(0) + /*---------------------------------------------------------------------------- | Software IEC/IEEE double-precision conversion routines. *----------------------------------------------------------------------------*/ @@ -295,17 +321,20 @@ int float64_compare( float64, float64 STATUS_PARAM ); int float64_compare_quiet( float64, float64 STATUS_PARAM ); int float64_is_nan( float64 a ); int float64_is_signaling_nan( float64 ); +float64 float64_scalbn( float64, int STATUS_PARAM ); INLINE float64 float64_abs(float64 a) { - return a & 0x7fffffffffffffffLL; + return make_float64(float64_val(a) & 0x7fffffffffffffffLL); } INLINE float64 float64_chs(float64 a) { - return a ^ 0x8000000000000000LL; + return make_float64(float64_val(a) ^ 0x8000000000000000LL); } +#define float64_zero make_float64(0) + #ifdef FLOATX80 /*---------------------------------------------------------------------------- @@ -339,6 +368,7 @@ int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_is_nan( floatx80 ); int floatx80_is_signaling_nan( floatx80 ); +floatx80 floatx80_scalbn( floatx80, int STATUS_PARAM ); INLINE floatx80 floatx80_abs(floatx80 a) { @@ -385,8 +415,11 @@ int float128_lt( float128, float128 STATUS_PARAM ); int float128_eq_signaling( float128, float128 STATUS_PARAM ); int float128_le_quiet( float128, float128 STATUS_PARAM ); int float128_lt_quiet( float128, float128 STATUS_PARAM ); +int float128_compare( float128, float128 STATUS_PARAM ); +int float128_compare_quiet( float128, float128 STATUS_PARAM ); int float128_is_nan( float128 ); int float128_is_signaling_nan( float128 ); +float128 float128_scalbn( float128, int STATUS_PARAM ); INLINE float128 float128_abs(float128 a) { |