diff options
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat.c | 135 | ||||
| -rw-r--r-- | fpu/softfloat.h | 69 |
2 files changed, 204 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index ad57fd9e16..5e846200ae 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -54,6 +54,11 @@ void set_float_rounding_mode(int val STATUS_PARAM) STATUS(float_rounding_mode) = val; } +void set_float_exception_flags(int val STATUS_PARAM) +{ + STATUS(float_exception_flags) = val; +} + #ifdef FLOATX80 void set_floatx80_rounding_precision(int val STATUS_PARAM) { @@ -5183,3 +5188,133 @@ flag float128_lt_quiet( float128 a, float128 b STATUS_PARAM ) #endif +/* misc functions */ +float32 uint32_to_float32( unsigned int a STATUS_PARAM ) +{ + return int64_to_float32(a STATUS_VAR); +} + +float64 uint32_to_float64( unsigned int a STATUS_PARAM ) +{ + return int64_to_float64(a STATUS_VAR); +} + +unsigned int float32_to_uint32( float32 a STATUS_PARAM ) +{ + int64_t v; + unsigned int res; + + v = float32_to_int64(a STATUS_VAR); + if (v < 0) { + res = 0; + float_raise( float_flag_invalid STATUS_VAR); + } else if (v > 0xffffffff) { + res = 0xffffffff; + float_raise( float_flag_invalid STATUS_VAR); + } else { + res = v; + } + return res; +} + +unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM ) +{ + int64_t v; + unsigned int res; + + v = float32_to_int64_round_to_zero(a STATUS_VAR); + if (v < 0) { + res = 0; + float_raise( float_flag_invalid STATUS_VAR); + } else if (v > 0xffffffff) { + res = 0xffffffff; + float_raise( float_flag_invalid STATUS_VAR); + } else { + res = v; + } + return res; +} + +unsigned int float64_to_uint32( float64 a STATUS_PARAM ) +{ + int64_t v; + unsigned int res; + + v = float64_to_int64(a STATUS_VAR); + if (v < 0) { + res = 0; + float_raise( float_flag_invalid STATUS_VAR); + } else if (v > 0xffffffff) { + res = 0xffffffff; + float_raise( float_flag_invalid STATUS_VAR); + } else { + res = v; + } + return res; +} + +unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM ) +{ + int64_t v; + unsigned int res; + + v = float64_to_int64_round_to_zero(a STATUS_VAR); + if (v < 0) { + res = 0; + float_raise( float_flag_invalid STATUS_VAR); + } else if (v > 0xffffffff) { + res = 0xffffffff; + float_raise( float_flag_invalid STATUS_VAR); + } else { + res = v; + } + return res; +} + +#define COMPARE(s, nan_exp) \ +INLINE char float ## s ## _compare_internal( float ## s a, float ## s b, \ + int is_quiet STATUS_PARAM ) \ +{ \ + flag aSign, bSign; \ + \ + if (( ( extractFloat ## s ## Exp( a ) == nan_exp ) && \ + extractFloat ## s ## Frac( a ) ) || \ + ( ( extractFloat ## s ## Exp( b ) == nan_exp ) && \ + extractFloat ## s ## Frac( b ) )) { \ + if (!is_quiet || \ + float ## s ## _is_signaling_nan( a ) || \ + float ## s ## _is_signaling_nan( b ) ) { \ + float_raise( float_flag_invalid STATUS_VAR); \ + } \ + return float_relation_unordered; \ + } \ + aSign = extractFloat ## s ## Sign( a ); \ + bSign = extractFloat ## s ## Sign( b ); \ + if ( aSign != bSign ) { \ + if ( (bits ## s) ( ( a | b )<<1 ) == 0 ) { \ + /* zero case */ \ + return float_relation_equal; \ + } else { \ + return 1 - (2 * aSign); \ + } \ + } else { \ + if (a == b) { \ + return float_relation_equal; \ + } else { \ + return 1 - 2 * (aSign ^ ( a < b )); \ + } \ + } \ +} \ + \ +char float ## s ## _compare( float ## s a, float ## s b STATUS_PARAM ) \ +{ \ + return float ## s ## _compare_internal(a, b, 0 STATUS_VAR); \ +} \ + \ +char float ## s ## _compare_quiet( float ## s a, float ## s b STATUS_PARAM ) \ +{ \ + return float ## s ## _compare_internal(a, b, 1 STATUS_VAR); \ +} + +COMPARE(32, 0xff) +COMPARE(64, 0x7ff) diff --git a/fpu/softfloat.h b/fpu/softfloat.h index 9aefbf75ac..666d6a017f 100644 --- a/fpu/softfloat.h +++ b/fpu/softfloat.h @@ -93,6 +93,16 @@ typedef int64_t sbits64; #define STATUS(field) status->field #define STATUS_VAR , status +/*---------------------------------------------------------------------------- +| Software IEC/IEEE floating-point ordering relations +*----------------------------------------------------------------------------*/ +enum { + float_relation_less = -1, + float_relation_equal = 0, + float_relation_greater = 1, + float_relation_unordered = 2 +}; + #ifdef CONFIG_SOFTFLOAT /*---------------------------------------------------------------------------- | Software IEC/IEEE floating-point types. @@ -154,6 +164,11 @@ typedef struct float_status { } float_status; void set_float_rounding_mode(int val STATUS_PARAM); +void set_float_exception_flags(int val STATUS_PARAM); +INLINE int get_float_exception_flags(float_status *status) +{ + return STATUS(float_exception_flags); +} #ifdef FLOATX80 void set_floatx80_rounding_precision(int val STATUS_PARAM); #endif @@ -169,6 +184,8 @@ void float_raise( signed char STATUS_PARAM); *----------------------------------------------------------------------------*/ float32 int32_to_float32( int STATUS_PARAM ); float64 int32_to_float64( int STATUS_PARAM ); +float32 uint32_to_float32( unsigned int STATUS_PARAM ); +float64 uint32_to_float64( unsigned int STATUS_PARAM ); #ifdef FLOATX80 floatx80 int32_to_floatx80( int STATUS_PARAM ); #endif @@ -189,6 +206,8 @@ float128 int64_to_float128( int64_t STATUS_PARAM ); *----------------------------------------------------------------------------*/ int float32_to_int32( float32 STATUS_PARAM ); int float32_to_int32_round_to_zero( float32 STATUS_PARAM ); +unsigned int float32_to_uint32( float32 STATUS_PARAM ); +unsigned int float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); int64_t float32_to_int64( float32 STATUS_PARAM ); int64_t float32_to_int64_round_to_zero( float32 STATUS_PARAM ); float64 float32_to_float64( float32 STATUS_PARAM ); @@ -215,13 +234,27 @@ char float32_lt( float32, float32 STATUS_PARAM ); char float32_eq_signaling( float32, float32 STATUS_PARAM ); char float32_le_quiet( float32, float32 STATUS_PARAM ); char float32_lt_quiet( float32, float32 STATUS_PARAM ); +char float32_compare( float32, float32 STATUS_PARAM ); +char float32_compare_quiet( float32, float32 STATUS_PARAM ); char float32_is_signaling_nan( float32 ); +INLINE float32 float32_abs(float32 a) +{ + return a & 0x7fffffff; +} + +INLINE float32 float32_chs(float32 a) +{ + return a ^ 0x80000000; +} + /*---------------------------------------------------------------------------- | Software IEC/IEEE double-precision conversion routines. *----------------------------------------------------------------------------*/ int float64_to_int32( float64 STATUS_PARAM ); int float64_to_int32_round_to_zero( float64 STATUS_PARAM ); +unsigned int float64_to_uint32( float64 STATUS_PARAM ); +unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM ); int64_t float64_to_int64( float64 STATUS_PARAM ); int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM ); float32 float64_to_float32( float64 STATUS_PARAM ); @@ -248,8 +281,20 @@ char float64_lt( float64, float64 STATUS_PARAM ); char float64_eq_signaling( float64, float64 STATUS_PARAM ); char float64_le_quiet( float64, float64 STATUS_PARAM ); char float64_lt_quiet( float64, float64 STATUS_PARAM ); +char float64_compare( float64, float64 STATUS_PARAM ); +char float64_compare_quiet( float64, float64 STATUS_PARAM ); char float64_is_signaling_nan( float64 ); +INLINE float64 float64_abs(float64 a) +{ + return a & 0x7fffffffffffffffLL; +} + +INLINE float64 float64_chs(float64 a) +{ + return a ^ 0x8000000000000000LL; +} + #ifdef FLOATX80 /*---------------------------------------------------------------------------- @@ -283,6 +328,18 @@ char floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM ); char floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM ); char floatx80_is_signaling_nan( floatx80 ); +INLINE floatx80 floatx80_abs(floatx80 a) +{ + a.high &= 0x7fff; + return a; +} + +INLINE floatx80 floatx80_chs(floatx80 a) +{ + a.high ^= 0x8000; + return a; +} + #endif #ifdef FLOAT128 @@ -318,6 +375,18 @@ char float128_le_quiet( float128, float128 STATUS_PARAM ); char float128_lt_quiet( float128, float128 STATUS_PARAM ); char float128_is_signaling_nan( float128 ); +INLINE float128 float128_abs(float128 a) +{ + a.high &= 0x7fffffffffffffffLL; + return a; +} + +INLINE float128 float128_chs(float128 a) +{ + a.high ^= 0x8000000000000000LL; + return a; +} + #endif #else /* CONFIG_SOFTFLOAT */ |