1 2 /*============================================================================ 3 4 This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic 5 Package, Release 3d, by John R. Hauser. 6 7 Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the 8 University of California. All rights reserved. 9 10 Redistribution and use in source and binary forms, with or without 11 modification, are permitted provided that the following conditions are met: 12 13 1. Redistributions of source code must retain the above copyright notice, 14 this list of conditions, and the following disclaimer. 15 16 2. Redistributions in binary form must reproduce the above copyright notice, 17 this list of conditions, and the following disclaimer in the documentation 18 and/or other materials provided with the distribution. 19 20 3. Neither the name of the University nor the names of its contributors may 21 be used to endorse or promote products derived from this software without 22 specific prior written permission. 23 24 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY 25 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 26 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE 27 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY 28 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 30 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 31 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 35 =============================================================================*/ 36 37 #ifndef internals_h 38 #define internals_h 1 39 40 #include <stdbool.h> 41 #include <stdint.h> 42 #include "primitives.h" 43 #include "softfloat_types.h" 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 union ui16_f16 { uint16_t ui; float16_t f; }; 50 union ui32_f32 { uint32_t ui; float32_t f; }; 51 union ui64_f64 { uint64_t ui; float64_t f; }; 52 53 #ifdef SOFTFLOAT_FAST_INT64 54 union extF80M_extF80 { struct extFloat80M fM; extFloat80_t f; }; 55 union ui128_f128 { struct uint128 ui; float128_t f; }; 56 #endif 57 58 enum { 59 softfloat_mulAdd_subC = 1, 60 softfloat_mulAdd_subProd = 2 61 }; 62 63 /*---------------------------------------------------------------------------- 64 *----------------------------------------------------------------------------*/ 65 uint_fast32_t softfloat_roundToUI32( bool, uint_fast64_t, uint_fast8_t, bool ); 66 67 #ifdef SOFTFLOAT_FAST_INT64 68 uint_fast64_t 69 softfloat_roundToUI64( 70 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 71 #else 72 uint_fast64_t softfloat_roundMToUI64( bool, uint32_t *, uint_fast8_t, bool ); 73 #endif 74 75 int_fast32_t softfloat_roundToI32( bool, uint_fast64_t, uint_fast8_t, bool ); 76 77 #ifdef SOFTFLOAT_FAST_INT64 78 int_fast64_t 79 softfloat_roundToI64( 80 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 81 #else 82 int_fast64_t softfloat_roundMToI64( bool, uint32_t *, uint_fast8_t, bool ); 83 #endif 84 85 /*---------------------------------------------------------------------------- 86 *----------------------------------------------------------------------------*/ 87 #define signF16UI( a ) ((bool) ((uint16_t) (a)>>15)) 88 #define expF16UI( a ) ((int_fast8_t) ((a)>>10) & 0x1F) 89 #define fracF16UI( a ) ((a) & 0x03FF) 90 #define packToF16UI( sign, exp, sig ) (((uint16_t) (sign)<<15) + ((uint16_t) (exp)<<10) + (sig)) 91 92 #define isNaNF16UI( a ) (((~(a) & 0x7C00) == 0) && ((a) & 0x03FF)) 93 94 struct exp8_sig16 { int_fast8_t exp; uint_fast16_t sig; }; 95 struct exp8_sig16 softfloat_normSubnormalF16Sig( uint_fast16_t ); 96 97 float16_t softfloat_roundPackToF16( bool, int_fast16_t, uint_fast16_t ); 98 float16_t softfloat_normRoundPackToF16( bool, int_fast16_t, uint_fast16_t ); 99 100 float16_t softfloat_addMagsF16( uint_fast16_t, uint_fast16_t ); 101 float16_t softfloat_subMagsF16( uint_fast16_t, uint_fast16_t ); 102 float16_t 103 softfloat_mulAddF16( 104 uint_fast16_t, uint_fast16_t, uint_fast16_t, uint_fast8_t ); 105 106 /*---------------------------------------------------------------------------- 107 *----------------------------------------------------------------------------*/ 108 #define signF32UI( a ) ((bool) ((uint32_t) (a)>>31)) 109 #define expF32UI( a ) ((int_fast16_t) ((a)>>23) & 0xFF) 110 #define fracF32UI( a ) ((a) & 0x007FFFFF) 111 #define packToF32UI( sign, exp, sig ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<23) + (sig)) 112 113 #define isNaNF32UI( a ) (((~(a) & 0x7F800000) == 0) && ((a) & 0x007FFFFF)) 114 115 struct exp16_sig32 { int_fast16_t exp; uint_fast32_t sig; }; 116 struct exp16_sig32 softfloat_normSubnormalF32Sig( uint_fast32_t ); 117 118 float32_t softfloat_roundPackToF32( bool, int_fast16_t, uint_fast32_t ); 119 float32_t softfloat_normRoundPackToF32( bool, int_fast16_t, uint_fast32_t ); 120 121 float32_t softfloat_addMagsF32( uint_fast32_t, uint_fast32_t ); 122 float32_t softfloat_subMagsF32( uint_fast32_t, uint_fast32_t ); 123 float32_t 124 softfloat_mulAddF32( 125 uint_fast32_t, uint_fast32_t, uint_fast32_t, uint_fast8_t ); 126 127 /*---------------------------------------------------------------------------- 128 *----------------------------------------------------------------------------*/ 129 #define signF64UI( a ) ((bool) ((uint64_t) (a)>>63)) 130 #define expF64UI( a ) ((int_fast16_t) ((a)>>52) & 0x7FF) 131 #define fracF64UI( a ) ((a) & UINT64_C( 0x000FFFFFFFFFFFFF )) 132 #define packToF64UI( sign, exp, sig ) ((uint64_t) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<52) + (sig))) 133 134 #define isNaNF64UI( a ) (((~(a) & UINT64_C( 0x7FF0000000000000 )) == 0) && ((a) & UINT64_C( 0x000FFFFFFFFFFFFF ))) 135 136 struct exp16_sig64 { int_fast16_t exp; uint_fast64_t sig; }; 137 struct exp16_sig64 softfloat_normSubnormalF64Sig( uint_fast64_t ); 138 139 float64_t softfloat_roundPackToF64( bool, int_fast16_t, uint_fast64_t ); 140 float64_t softfloat_normRoundPackToF64( bool, int_fast16_t, uint_fast64_t ); 141 142 float64_t softfloat_addMagsF64( uint_fast64_t, uint_fast64_t, bool ); 143 float64_t softfloat_subMagsF64( uint_fast64_t, uint_fast64_t, bool ); 144 float64_t 145 softfloat_mulAddF64( 146 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 147 148 /*---------------------------------------------------------------------------- 149 *----------------------------------------------------------------------------*/ 150 #define signExtF80UI64( a64 ) ((bool) ((uint16_t) (a64)>>15)) 151 #define expExtF80UI64( a64 ) ((a64) & 0x7FFF) 152 #define packToExtF80UI64( sign, exp ) ((uint_fast16_t) (sign)<<15 | (exp)) 153 154 #define isNaNExtF80UI( a64, a0 ) ((((a64) & 0x7FFF) == 0x7FFF) && ((a0) & UINT64_C( 0x7FFFFFFFFFFFFFFF ))) 155 156 #ifdef SOFTFLOAT_FAST_INT64 157 158 /*---------------------------------------------------------------------------- 159 *----------------------------------------------------------------------------*/ 160 161 struct exp32_sig64 { int_fast32_t exp; uint64_t sig; }; 162 struct exp32_sig64 softfloat_normSubnormalExtF80Sig( uint_fast64_t ); 163 164 extFloat80_t 165 softfloat_roundPackToExtF80( 166 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 167 extFloat80_t 168 softfloat_normRoundPackToExtF80( 169 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 170 171 extFloat80_t 172 softfloat_addMagsExtF80( 173 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 174 extFloat80_t 175 softfloat_subMagsExtF80( 176 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 177 178 /*---------------------------------------------------------------------------- 179 *----------------------------------------------------------------------------*/ 180 #define signF128UI64( a64 ) ((bool) ((uint64_t) (a64)>>63)) 181 #define expF128UI64( a64 ) ((int_fast32_t) ((a64)>>48) & 0x7FFF) 182 #define fracF128UI64( a64 ) ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )) 183 #define packToF128UI64( sign, exp, sig64 ) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<48) + (sig64)) 184 185 #define isNaNF128UI( a64, a0 ) (((~(a64) & UINT64_C( 0x7FFF000000000000 )) == 0) && (a0 || ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )))) 186 187 struct exp32_sig128 { int_fast32_t exp; struct uint128 sig; }; 188 struct exp32_sig128 189 softfloat_normSubnormalF128Sig( uint_fast64_t, uint_fast64_t ); 190 191 float128_t 192 softfloat_roundPackToF128( 193 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast64_t ); 194 float128_t 195 softfloat_normRoundPackToF128( 196 bool, int_fast32_t, uint_fast64_t, uint_fast64_t ); 197 198 float128_t 199 softfloat_addMagsF128( 200 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 201 float128_t 202 softfloat_subMagsF128( 203 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 204 float128_t 205 softfloat_mulAddF128( 206 uint_fast64_t, 207 uint_fast64_t, 208 uint_fast64_t, 209 uint_fast64_t, 210 uint_fast64_t, 211 uint_fast64_t, 212 uint_fast8_t 213 ); 214 215 #else 216 217 /*---------------------------------------------------------------------------- 218 *----------------------------------------------------------------------------*/ 219 220 bool 221 softfloat_tryPropagateNaNExtF80M( 222 const struct extFloat80M *, 223 const struct extFloat80M *, 224 struct extFloat80M * 225 ); 226 void softfloat_invalidExtF80M( struct extFloat80M * ); 227 228 int softfloat_normExtF80SigM( uint64_t * ); 229 230 void 231 softfloat_roundPackMToExtF80M( 232 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 233 void 234 softfloat_normRoundPackMToExtF80M( 235 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 236 237 void 238 softfloat_addExtF80M( 239 const struct extFloat80M *, 240 const struct extFloat80M *, 241 struct extFloat80M *, 242 bool 243 ); 244 245 int 246 softfloat_compareNonnormExtF80M( 247 const struct extFloat80M *, const struct extFloat80M * ); 248 249 /*---------------------------------------------------------------------------- 250 *----------------------------------------------------------------------------*/ 251 #define signF128UI96( a96 ) ((bool) ((uint32_t) (a96)>>31)) 252 #define expF128UI96( a96 ) ((int32_t) ((a96)>>16) & 0x7FFF) 253 #define fracF128UI96( a96 ) ((a96) & 0x0000FFFF) 254 #define packToF128UI96( sign, exp, sig96 ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<16) + (sig96)) 255 256 bool softfloat_isNaNF128M( const uint32_t * ); 257 258 bool 259 softfloat_tryPropagateNaNF128M( 260 const uint32_t *, const uint32_t *, uint32_t * ); 261 void softfloat_invalidF128M( uint32_t * ); 262 263 int softfloat_shiftNormSigF128M( const uint32_t *, uint_fast8_t, uint32_t * ); 264 265 void softfloat_roundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 266 void softfloat_normRoundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 267 268 void 269 softfloat_addF128M( const uint32_t *, const uint32_t *, uint32_t *, bool ); 270 void 271 softfloat_mulAddF128M( 272 const uint32_t *, 273 const uint32_t *, 274 const uint32_t *, 275 uint32_t *, 276 uint_fast8_t 277 ); 278 279 #endif 280 281 #ifdef __cplusplus 282 } 283 #endif 284 285 #endif 286 287