diff options
Diffstat (limited to 'lib/libc/softfloat/templates/softfloat.h')
| -rw-r--r-- | lib/libc/softfloat/templates/softfloat.h | 290 |
1 files changed, 290 insertions, 0 deletions
diff --git a/lib/libc/softfloat/templates/softfloat.h b/lib/libc/softfloat/templates/softfloat.h new file mode 100644 index 000000000000..aaf84e6842a0 --- /dev/null +++ b/lib/libc/softfloat/templates/softfloat.h @@ -0,0 +1,290 @@ + +/* +=============================================================================== + +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 + |