| /* | |
| =============================================================================== | |
| This C header file is part of the SoftFloat IEC/IEEE Floating-point | |
| Arithmetic Package, Release 2a. | |
| Written by John R. Hauser. This work was made possible in part by the | |
| International Computer Science Institute, located at Suite 600, 1947 Center | |
| Street, Berkeley, California 94704. Funding was partially provided by the | |
| National Science Foundation under grant MIP-9311980. The original version | |
| of this code was written as part of a project to build a fixed-point vector | |
| processor in collaboration with the University of California at Berkeley, | |
| overseen by Profs. Nelson Morgan and John Wawrzynek. More information | |
| is available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/ | |
| arithmetic/SoftFloat.html'. | |
| THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort | |
| has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT | |
| TIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO | |
| PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY | |
| AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. | |
| Derivative works are acceptable, even for commercial purposes, so long as | |
| (1) they include prominent notice that the work is derivative, and (2) they | |
| include prominent notice akin to these four paragraphs for those parts of | |
| this code that are retained. | |
| =============================================================================== | |
| */ | |
| /* | |
| ------------------------------------------------------------------------------- | |
| The macro `FLOATX80' must be defined to enable the extended double-precision | |
| floating-point format `floatx80'. If this macro is not defined, the | |
| `floatx80' type will not be defined, and none of the functions that either | |
| input or output the `floatx80' type will be defined. The same applies to | |
| the `FLOAT128' macro and the quadruple-precision format `float128'. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| #define FLOATX80 | |
| #define FLOAT128 | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE floating-point types. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| typedef !!!bits32 float32; | |
| typedef !!!bits64 float64; | |
| #ifdef FLOATX80 | |
| typedef struct { | |
| !!!bits16 high; | |
| !!!bits64 low; | |
| } floatx80; | |
| #endif | |
| #ifdef FLOAT128 | |
| typedef struct { | |
| !!!bits64 high, low; | |
| } float128; | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE floating-point underflow tininess-detection mode. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| extern !!!int8 float_detect_tininess; | |
| enum { | |
| float_tininess_after_rounding = 0, | |
| float_tininess_before_rounding = 1 | |
| }; | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE floating-point rounding mode. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| extern !!!int8 float_rounding_mode; | |
| enum { | |
| float_round_nearest_even = 0, | |
| float_round_to_zero = 1, | |
| float_round_down = 2, | |
| float_round_up = 3 | |
| }; | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE floating-point exception flags. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| extern !!!int8 float_exception_flags; | |
| enum { | |
| float_flag_inexact = 1, | |
| float_flag_underflow = 2, | |
| float_flag_overflow = 4, | |
| float_flag_divbyzero = 8, | |
| float_flag_invalid = 16 | |
| }; | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Routine to raise any or all of the software IEC/IEEE floating-point | |
| exception flags. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| void float_raise( !!!int8 ); | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE integer-to-floating-point conversion routines. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| float32 int32_to_float32( !!!int32 ); | |
| float64 int32_to_float64( !!!int32 ); | |
| #ifdef FLOATX80 | |
| floatx80 int32_to_floatx80( !!!int32 ); | |
| #endif | |
| #ifdef FLOAT128 | |
| float128 int32_to_float128( !!!int32 ); | |
| #endif | |
| float32 int64_to_float32( !!!int64 ); | |
| float64 int64_to_float64( !!!int64 ); | |
| #ifdef FLOATX80 | |
| floatx80 int64_to_floatx80( !!!int64 ); | |
| #endif | |
| #ifdef FLOAT128 | |
| float128 int64_to_float128( !!!int64 ); | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE single-precision conversion routines. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| !!!int32 float32_to_int32( float32 ); | |
| !!!int32 float32_to_int32_round_to_zero( float32 ); | |
| !!!int64 float32_to_int64( float32 ); | |
| !!!int64 float32_to_int64_round_to_zero( float32 ); | |
| float64 float32_to_float64( float32 ); | |
| #ifdef FLOATX80 | |
| floatx80 float32_to_floatx80( float32 ); | |
| #endif | |
| #ifdef FLOAT128 | |
| float128 float32_to_float128( float32 ); | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE single-precision operations. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| float32 float32_round_to_int( float32 ); | |
| float32 float32_add( float32, float32 ); | |
| float32 float32_sub( float32, float32 ); | |
| float32 float32_mul( float32, float32 ); | |
| float32 float32_div( float32, float32 ); | |
| float32 float32_rem( float32, float32 ); | |
| float32 float32_sqrt( float32 ); | |
| !!!flag float32_eq( float32, float32 ); | |
| !!!flag float32_le( float32, float32 ); | |
| !!!flag float32_lt( float32, float32 ); | |
| !!!flag float32_eq_signaling( float32, float32 ); | |
| !!!flag float32_le_quiet( float32, float32 ); | |
| !!!flag float32_lt_quiet( float32, float32 ); | |
| !!!flag float32_is_signaling_nan( float32 ); | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE double-precision conversion routines. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| !!!int32 float64_to_int32( float64 ); | |
| !!!int32 float64_to_int32_round_to_zero( float64 ); | |
| !!!int64 float64_to_int64( float64 ); | |
| !!!int64 float64_to_int64_round_to_zero( float64 ); | |
| float32 float64_to_float32( float64 ); | |
| #ifdef FLOATX80 | |
| floatx80 float64_to_floatx80( float64 ); | |
| #endif | |
| #ifdef FLOAT128 | |
| float128 float64_to_float128( float64 ); | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE double-precision operations. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| float64 float64_round_to_int( float64 ); | |
| float64 float64_add( float64, float64 ); | |
| float64 float64_sub( float64, float64 ); | |
| float64 float64_mul( float64, float64 ); | |
| float64 float64_div( float64, float64 ); | |
| float64 float64_rem( float64, float64 ); | |
| float64 float64_sqrt( float64 ); | |
| !!!flag float64_eq( float64, float64 ); | |
| !!!flag float64_le( float64, float64 ); | |
| !!!flag float64_lt( float64, float64 ); | |
| !!!flag float64_eq_signaling( float64, float64 ); | |
| !!!flag float64_le_quiet( float64, float64 ); | |
| !!!flag float64_lt_quiet( float64, float64 ); | |
| !!!flag float64_is_signaling_nan( float64 ); | |
| #ifdef FLOATX80 | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE extended double-precision conversion routines. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| !!!int32 floatx80_to_int32( floatx80 ); | |
| !!!int32 floatx80_to_int32_round_to_zero( floatx80 ); | |
| !!!int64 floatx80_to_int64( floatx80 ); | |
| !!!int64 floatx80_to_int64_round_to_zero( floatx80 ); | |
| float32 floatx80_to_float32( floatx80 ); | |
| float64 floatx80_to_float64( floatx80 ); | |
| #ifdef FLOAT128 | |
| float128 floatx80_to_float128( floatx80 ); | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE extended double-precision rounding precision. Valid | |
| values are 32, 64, and 80. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| extern !!!int8 floatx80_rounding_precision; | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE extended double-precision operations. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| floatx80 floatx80_round_to_int( floatx80 ); | |
| floatx80 floatx80_add( floatx80, floatx80 ); | |
| floatx80 floatx80_sub( floatx80, floatx80 ); | |
| floatx80 floatx80_mul( floatx80, floatx80 ); | |
| floatx80 floatx80_div( floatx80, floatx80 ); | |
| floatx80 floatx80_rem( floatx80, floatx80 ); | |
| floatx80 floatx80_sqrt( floatx80 ); | |
| !!!flag floatx80_eq( floatx80, floatx80 ); | |
| !!!flag floatx80_le( floatx80, floatx80 ); | |
| !!!flag floatx80_lt( floatx80, floatx80 ); | |
| !!!flag floatx80_eq_signaling( floatx80, floatx80 ); | |
| !!!flag floatx80_le_quiet( floatx80, floatx80 ); | |
| !!!flag floatx80_lt_quiet( floatx80, floatx80 ); | |
| !!!flag floatx80_is_signaling_nan( floatx80 ); | |
| #endif | |
| #ifdef FLOAT128 | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE quadruple-precision conversion routines. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| !!!int32 float128_to_int32( float128 ); | |
| !!!int32 float128_to_int32_round_to_zero( float128 ); | |
| !!!int64 float128_to_int64( float128 ); | |
| !!!int64 float128_to_int64_round_to_zero( float128 ); | |
| float32 float128_to_float32( float128 ); | |
| float64 float128_to_float64( float128 ); | |
| #ifdef FLOATX80 | |
| floatx80 float128_to_floatx80( float128 ); | |
| #endif | |
| /* | |
| ------------------------------------------------------------------------------- | |
| Software IEC/IEEE quadruple-precision operations. | |
| ------------------------------------------------------------------------------- | |
| */ | |
| float128 float128_round_to_int( float128 ); | |
| float128 float128_add( float128, float128 ); | |
| float128 float128_sub( float128, float128 ); | |
| float128 float128_mul( float128, float128 ); | |
| float128 float128_div( float128, float128 ); | |
| float128 float128_rem( float128, float128 ); | |
| float128 float128_sqrt( float128 ); | |
| !!!flag float128_eq( float128, float128 ); | |
| !!!flag float128_le( float128, float128 ); | |
| !!!flag float128_lt( float128, float128 ); | |
| !!!flag float128_eq_signaling( float128, float128 ); | |
| !!!flag float128_le_quiet( float128, float128 ); | |
| !!!flag float128_lt_quiet( float128, float128 ); | |
| !!!flag float128_is_signaling_nan( float128 ); | |
| #endif | |