165185Sache/* $NetBSD: softfloat.h,v 1.6 2011/07/04 08:02:34 matt Exp $ */ 265185Sache 365185Sache/* This is a derivative work. */ 465185Sache 565185Sache/* 665185Sache=============================================================================== 765185Sache 865185SacheThis C header file is part of the SoftFloat IEC/IEEE Floating-point 965185SacheArithmetic Package, Release 2a. 1065185Sache 1165185SacheWritten by John R. Hauser. This work was made possible in part by the 1265185SacheInternational Computer Science Institute, located at Suite 600, 1947 Center 1365185SacheStreet, Berkeley, California 94704. Funding was partially provided by the 1465185SacheNational Science Foundation under grant MIP-9311980. The original version 1565185Sacheof this code was written as part of a project to build a fixed-point vector 1665185Sacheprocessor in collaboration with the University of California at Berkeley, 1765185Sacheoverseen by Profs. Nelson Morgan and John Wawrzynek. More information 1865185Sacheis available through the Web page `http://HTTP.CS.Berkeley.EDU/~jhauser/ 1965185Sachearithmetic/SoftFloat.html'. 2065185Sache 2165185SacheTHIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE. Although reasonable effort 2265185Sachehas been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT 2365185SacheTIMES RESULT IN INCORRECT BEHAVIOR. USE OF THIS SOFTWARE IS RESTRICTED TO 2465185SachePERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY 2565185SacheAND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE. 2665185Sache 2765185SacheDerivative works are acceptable, even for commercial purposes, so long as 2865185Sache(1) they include prominent notice that the work is derivative, and (2) they 2965185Sacheinclude prominent notice akin to these four paragraphs for those parts of 3065185Sachethis code that are retained. 3165185Sache 3265185Sache=============================================================================== 3365185Sache*/ 3465185Sache 3565185Sache/* 3665185Sache------------------------------------------------------------------------------- 3765185SacheThe macro `FLOATX80' must be defined to enable the extended double-precision 3865185Sachefloating-point format `floatx80'. If this macro is not defined, the 3965185Sache`floatx80' type will not be defined, and none of the functions that either 4065185Sacheinput or output the `floatx80' type will be defined. The same applies to 4165185Sachethe `FLOAT128' macro and the quadruple-precision format `float128'. 4265185Sache------------------------------------------------------------------------------- 4365185Sache*/ 4465185Sache/* #define FLOATX80 */ 4565185Sache/* #define FLOAT128 */ 4665185Sache 4765185Sache#include <machine/ieeefp.h> 4865185Sache 4965185Sache/* 5065185Sache------------------------------------------------------------------------------- 5165185SacheSoftware IEC/IEEE floating-point types. 5265185Sache------------------------------------------------------------------------------- 5365185Sache*/ 5465185Sachetypedef unsigned int float32; 5565185Sachetypedef unsigned long long float64; 5665185Sache#ifdef FLOATX80 5765185Sachetypedef struct { 5865185Sache unsigned short high; 5965185Sache unsigned long long low; 6065185Sache} floatx80; 6165185Sache#endif 6265185Sache#ifdef FLOAT128 6365185Sachetypedef struct { 6465185Sache unsigned long long high, low; 6565185Sache} float128; 6665185Sache#endif 6765185Sache 6865185Sache/* 6965185Sache------------------------------------------------------------------------------- 7065185SacheSoftware IEC/IEEE floating-point underflow tininess-detection mode. 7165185Sache------------------------------------------------------------------------------- 7265185Sache*/ 7365185Sache#ifndef SOFTFLOAT_FOR_GCC 7465185Sacheextern int8 float_detect_tininess; 7565185Sache#endif 7665185Sacheenum { 7765185Sache float_tininess_after_rounding = 0, 7865185Sache float_tininess_before_rounding = 1 7965185Sache}; 8065185Sache 8165185Sache/* 8265185Sache------------------------------------------------------------------------------- 8365185SacheSoftware IEC/IEEE floating-point rounding mode. 8465185Sache------------------------------------------------------------------------------- 8565185Sache*/ 8665185Sacheextern fp_rnd float_rounding_mode; 8765185Sache#define float_round_nearest_even FP_RN 8865185Sache#define float_round_to_zero FP_RZ 8965185Sache#define float_round_down FP_RM 9065185Sache#define float_round_up FP_RP 9165185Sache 9265185Sache/* 9365185Sache------------------------------------------------------------------------------- 9465185SacheSoftware IEC/IEEE floating-point exception flags. 9565185Sache------------------------------------------------------------------------------- 9665185Sache*/ 9765185Sacheextern fp_except float_exception_flags; 9874119Sacheextern fp_except float_exception_mask; 9965185Sacheenum { 10065185Sache float_flag_inexact = FP_X_IMP, 10165185Sache float_flag_underflow = FP_X_UFL, 10265185Sache float_flag_overflow = FP_X_OFL, 10365185Sache float_flag_divbyzero = FP_X_DZ, 10465185Sache float_flag_invalid = FP_X_INV 10565185Sache}; 10665185Sache 10765185Sache/* 10874119Sache------------------------------------------------------------------------------- 10965185SacheRoutine to raise any or all of the software IEC/IEEE floating-point 11065185Sacheexception flags. 11165185Sache------------------------------------------------------------------------------- 11265185Sache*/ 11365185Sachevoid float_raise( fp_except ); 11465185Sache 115/* 116------------------------------------------------------------------------------- 117Software IEC/IEEE integer-to-floating-point conversion routines. 118------------------------------------------------------------------------------- 119*/ 120float32 int32_to_float32( int32 ); 121float32 uint32_to_float32( uint32 ); 122float64 int32_to_float64( int32 ); 123float64 uint32_to_float64( uint32 ); 124#ifdef FLOATX80 125floatx80 int32_to_floatx80( int32 ); 126floatx80 uint32_to_floatx80( uint32 ); 127#endif 128#ifdef FLOAT128 129float128 int32_to_float128( int32 ); 130float128 uint32_to_float128( uint32 ); 131#endif 132float32 int64_to_float32( long long ); 133float64 int64_to_float64( long long ); 134#ifdef FLOATX80 135floatx80 int64_to_floatx80( long long ); 136#endif 137#ifdef FLOAT128 138float128 int64_to_float128( long long ); 139#endif 140 141/* 142------------------------------------------------------------------------------- 143Software IEC/IEEE single-precision conversion routines. 144------------------------------------------------------------------------------- 145*/ 146int float32_to_int32( float32 ); 147int float32_to_int32_round_to_zero( float32 ); 148unsigned int float32_to_uint32_round_to_zero( float32 ); 149long long float32_to_int64( float32 ); 150long long float32_to_int64_round_to_zero( float32 ); 151float64 float32_to_float64( float32 ); 152#ifdef FLOATX80 153floatx80 float32_to_floatx80( float32 ); 154#endif 155#ifdef FLOAT128 156float128 float32_to_float128( float32 ); 157#endif 158 159/* 160------------------------------------------------------------------------------- 161Software IEC/IEEE single-precision operations. 162------------------------------------------------------------------------------- 163*/ 164float32 float32_round_to_int( float32 ); 165float32 float32_add( float32, float32 ); 166float32 float32_sub( float32, float32 ); 167float32 float32_mul( float32, float32 ); 168float32 float32_div( float32, float32 ); 169float32 float32_rem( float32, float32 ); 170float32 float32_sqrt( float32 ); 171flag float32_eq( float32, float32 ); 172flag float32_le( float32, float32 ); 173flag float32_lt( float32, float32 ); 174flag float32_eq_signaling( float32, float32 ); 175flag float32_le_quiet( float32, float32 ); 176flag float32_lt_quiet( float32, float32 ); 177#ifndef SOFTFLOAT_FOR_GCC 178flag float32_is_signaling_nan( float32 ); 179#endif 180 181/* 182------------------------------------------------------------------------------- 183Software IEC/IEEE double-precision conversion routines. 184------------------------------------------------------------------------------- 185*/ 186int float64_to_int32( float64 ); 187int float64_to_int32_round_to_zero( float64 ); 188unsigned int float64_to_uint32_round_to_zero( float64 ); 189long long float64_to_int64( float64 ); 190long long float64_to_int64_round_to_zero( float64 ); 191float32 float64_to_float32( float64 ); 192#ifdef FLOATX80 193floatx80 float64_to_floatx80( float64 ); 194#endif 195#ifdef FLOAT128 196float128 float64_to_float128( float64 ); 197#endif 198 199/* 200------------------------------------------------------------------------------- 201Software IEC/IEEE double-precision operations. 202------------------------------------------------------------------------------- 203*/ 204float64 float64_round_to_int( float64 ); 205float64 float64_add( float64, float64 ); 206float64 float64_sub( float64, float64 ); 207float64 float64_mul( float64, float64 ); 208float64 float64_div( float64, float64 ); 209float64 float64_rem( float64, float64 ); 210float64 float64_sqrt( float64 ); 211flag float64_eq( float64, float64 ); 212flag float64_le( float64, float64 ); 213flag float64_lt( float64, float64 ); 214flag float64_eq_signaling( float64, float64 ); 215flag float64_le_quiet( float64, float64 ); 216flag float64_lt_quiet( float64, float64 ); 217#ifndef SOFTFLOAT_FOR_GCC 218flag float64_is_signaling_nan( float64 ); 219#endif 220 221#ifdef FLOATX80 222 223/* 224------------------------------------------------------------------------------- 225Software IEC/IEEE extended double-precision conversion routines. 226------------------------------------------------------------------------------- 227*/ 228int floatx80_to_int32( floatx80 ); 229int floatx80_to_int32_round_to_zero( floatx80 ); 230long long floatx80_to_int64( floatx80 ); 231long long floatx80_to_int64_round_to_zero( floatx80 ); 232float32 floatx80_to_float32( floatx80 ); 233float64 floatx80_to_float64( floatx80 ); 234#ifdef FLOAT128 235float128 floatx80_to_float128( floatx80 ); 236#endif 237 238/* 239------------------------------------------------------------------------------- 240Software IEC/IEEE extended double-precision rounding precision. Valid 241values are 32, 64, and 80. 242------------------------------------------------------------------------------- 243*/ 244extern int floatx80_rounding_precision; 245 246/* 247------------------------------------------------------------------------------- 248Software IEC/IEEE extended double-precision operations. 249------------------------------------------------------------------------------- 250*/ 251floatx80 floatx80_round_to_int( floatx80 ); 252floatx80 floatx80_add( floatx80, floatx80 ); 253floatx80 floatx80_sub( floatx80, floatx80 ); 254floatx80 floatx80_mul( floatx80, floatx80 ); 255floatx80 floatx80_div( floatx80, floatx80 ); 256floatx80 floatx80_rem( floatx80, floatx80 ); 257floatx80 floatx80_sqrt( floatx80 ); 258flag floatx80_eq( floatx80, floatx80 ); 259flag floatx80_le( floatx80, floatx80 ); 260flag floatx80_lt( floatx80, floatx80 ); 261flag floatx80_eq_signaling( floatx80, floatx80 ); 262flag floatx80_le_quiet( floatx80, floatx80 ); 263flag floatx80_lt_quiet( floatx80, floatx80 ); 264flag floatx80_is_signaling_nan( floatx80 ); 265 266#endif 267 268#ifdef FLOAT128 269 270/* 271------------------------------------------------------------------------------- 272Software IEC/IEEE quadruple-precision conversion routines. 273------------------------------------------------------------------------------- 274*/ 275int float128_to_int32( float128 ); 276int float128_to_int32_round_to_zero( float128 ); 277long long float128_to_int64( float128 ); 278long long float128_to_int64_round_to_zero( float128 ); 279float32 float128_to_float32( float128 ); 280float64 float128_to_float64( float128 ); 281#ifdef FLOATX80 282floatx80 float128_to_floatx80( float128 ); 283#endif 284 285/* 286------------------------------------------------------------------------------- 287Software IEC/IEEE quadruple-precision operations. 288------------------------------------------------------------------------------- 289*/ 290float128 float128_round_to_int( float128 ); 291float128 float128_add( float128, float128 ); 292float128 float128_sub( float128, float128 ); 293float128 float128_mul( float128, float128 ); 294float128 float128_div( float128, float128 ); 295float128 float128_rem( float128, float128 ); 296float128 float128_sqrt( float128 ); 297flag float128_eq( float128, float128 ); 298flag float128_le( float128, float128 ); 299flag float128_lt( float128, float128 ); 300flag float128_eq_signaling( float128, float128 ); 301flag float128_le_quiet( float128, float128 ); 302flag float128_lt_quiet( float128, float128 ); 303flag float128_is_signaling_nan( float128 ); 304 305#endif 306