1 /* SPDX-License-Identifier: BSD-3-Clause */ 2 3 /*============================================================================ 4 5 This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic 6 Package, Release 3a, by John R. Hauser. 7 8 Copyright 2011, 2012, 2013, 2014 The Regents of the University of California. 9 All rights reserved. 10 11 Redistribution and use in source and binary forms, with or without 12 modification, are permitted provided that the following conditions are met: 13 14 1. Redistributions of source code must retain the above copyright notice, 15 this list of conditions, and the following disclaimer. 16 17 2. Redistributions in binary form must reproduce the above copyright notice, 18 this list of conditions, and the following disclaimer in the documentation 19 and/or other materials provided with the distribution. 20 21 3. Neither the name of the University nor the names of its contributors may 22 be used to endorse or promote products derived from this software without 23 specific prior written permission. 24 25 THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY 26 EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 27 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE 28 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY 29 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 32 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 34 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 36 =============================================================================*/ 37 38 #ifndef internals_h 39 #define internals_h 1 40 41 #include <stdbool.h> 42 #include <stdint.h> 43 #include "primitives.h" 44 #include "softfloat_types.h" 45 46 union ui32_f32 { uint32_t ui; float32_t f; }; 47 union ui64_f64 { uint64_t ui; float64_t f; }; 48 49 #ifdef SOFTFLOAT_FAST_INT64 50 union extF80M_extF80 { struct extFloat80M fM; extFloat80_t f; }; 51 union ui128_f128 { struct uint128 ui; float128_t f; }; 52 #endif 53 54 enum { 55 softfloat_mulAdd_subC = 1, 56 softfloat_mulAdd_subProd = 2 57 }; 58 59 /*---------------------------------------------------------------------------- 60 *----------------------------------------------------------------------------*/ 61 uint_fast32_t 62 softfloat_roundPackToUI32( bool, uint_fast64_t, uint_fast8_t, bool ); 63 64 #ifdef SOFTFLOAT_FAST_INT64 65 uint_fast64_t 66 softfloat_roundPackToUI64( 67 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 68 #else 69 uint_fast64_t 70 softfloat_roundPackMToUI64( bool, uint32_t *, uint_fast8_t, bool ); 71 #endif 72 73 int_fast32_t 74 softfloat_roundPackToI32( bool, uint_fast64_t, uint_fast8_t, bool ); 75 76 #ifdef SOFTFLOAT_FAST_INT64 77 int_fast64_t 78 softfloat_roundPackToI64( 79 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 80 #else 81 int_fast64_t softfloat_roundPackMToI64( bool, uint32_t *, uint_fast8_t, bool ); 82 #endif 83 84 /*---------------------------------------------------------------------------- 85 *----------------------------------------------------------------------------*/ 86 #define signF32UI( a ) ((bool) ((uint32_t) (a)>>31)) 87 #define expF32UI( a ) ((int_fast16_t) ((a)>>23) & 0xFF) 88 #define fracF32UI( a ) ((a) & 0x007FFFFF) 89 #define packToF32UI( sign, exp, sig ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<23) + (sig)) 90 91 #define isNaNF32UI( a ) ((((a) & 0x7F800000) == 0x7F800000) && ((a) & 0x007FFFFF)) 92 93 struct exp16_sig32 { int_fast16_t exp; uint_fast32_t sig; }; 94 struct exp16_sig32 softfloat_normSubnormalF32Sig( uint_fast32_t ); 95 96 float32_t softfloat_roundPackToF32( bool, int_fast16_t, uint_fast32_t ); 97 float32_t softfloat_normRoundPackToF32( bool, int_fast16_t, uint_fast32_t ); 98 99 float32_t softfloat_addMagsF32( uint_fast32_t, uint_fast32_t, bool ); 100 float32_t softfloat_subMagsF32( uint_fast32_t, uint_fast32_t, bool ); 101 float32_t 102 softfloat_mulAddF32( 103 uint_fast32_t, uint_fast32_t, uint_fast32_t, uint_fast8_t ); 104 105 /*---------------------------------------------------------------------------- 106 *----------------------------------------------------------------------------*/ 107 #define signF64UI( a ) ((bool) ((uint64_t) (a)>>63)) 108 #define expF64UI( a ) ((int_fast16_t) ((a)>>52) & 0x7FF) 109 #define fracF64UI( a ) ((a) & UINT64_C( 0x000FFFFFFFFFFFFF )) 110 #define packToF64UI( sign, exp, sig ) ((uint64_t) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<52) + (sig))) 111 112 #define isNaNF64UI( a ) ((((a) & UINT64_C( 0x7FF0000000000000 )) == UINT64_C( 0x7FF0000000000000 )) && ((a) & UINT64_C( 0x000FFFFFFFFFFFFF ))) 113 114 struct exp16_sig64 { int_fast16_t exp; uint_fast64_t sig; }; 115 struct exp16_sig64 softfloat_normSubnormalF64Sig( uint_fast64_t ); 116 117 float64_t softfloat_roundPackToF64( bool, int_fast16_t, uint_fast64_t ); 118 float64_t softfloat_normRoundPackToF64( bool, int_fast16_t, uint_fast64_t ); 119 120 float64_t softfloat_addMagsF64( uint_fast64_t, uint_fast64_t, bool ); 121 float64_t softfloat_subMagsF64( uint_fast64_t, uint_fast64_t, bool ); 122 float64_t 123 softfloat_mulAddF64( 124 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 125 126 /*---------------------------------------------------------------------------- 127 *----------------------------------------------------------------------------*/ 128 #define signExtF80UI64( a64 ) ((bool) ((uint16_t) (a64)>>15)) 129 #define expExtF80UI64( a64 ) ((a64) & 0x7FFF) 130 #define packToExtF80UI64( sign, exp ) ((uint_fast16_t) (sign)<<15 | (exp)) 131 132 #define isNaNExtF80UI( a64, a0 ) ((((a64) & 0x7FFF) == 0x7FFF) && ((a0) & UINT64_C( 0x7FFFFFFFFFFFFFFF ))) 133 134 #ifdef SOFTFLOAT_FAST_INT64 135 136 /*---------------------------------------------------------------------------- 137 *----------------------------------------------------------------------------*/ 138 139 struct exp32_sig64 { int_fast32_t exp; uint64_t sig; }; 140 struct exp32_sig64 softfloat_normSubnormalExtF80Sig( uint_fast64_t ); 141 142 extFloat80_t 143 softfloat_roundPackToExtF80( 144 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 145 extFloat80_t 146 softfloat_normRoundPackToExtF80( 147 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 148 149 extFloat80_t 150 softfloat_addMagsExtF80( 151 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 152 extFloat80_t 153 softfloat_subMagsExtF80( 154 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 155 156 /*---------------------------------------------------------------------------- 157 *----------------------------------------------------------------------------*/ 158 #define signF128UI64( a64 ) ((bool) ((uint64_t) (a64)>>63)) 159 #define expF128UI64( a64 ) ((int_fast32_t) ((a64)>>48) & 0x7FFF) 160 #define fracF128UI64( a64 ) ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )) 161 #define packToF128UI64( sign, exp, sig64 ) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<48) + (sig64)) 162 163 #define isNaNF128UI( a64, a0 ) ((((a64) & UINT64_C( 0x7FFF000000000000 )) == UINT64_C( 0x7FFF000000000000 )) && (a0 || ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )))) 164 165 struct exp32_sig128 { int_fast32_t exp; struct uint128 sig; }; 166 struct exp32_sig128 167 softfloat_normSubnormalF128Sig( uint_fast64_t, uint_fast64_t ); 168 169 float128_t 170 softfloat_roundPackToF128( 171 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast64_t ); 172 float128_t 173 softfloat_normRoundPackToF128( 174 bool, int_fast32_t, uint_fast64_t, uint_fast64_t ); 175 176 float128_t 177 softfloat_addMagsF128( 178 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 179 float128_t 180 softfloat_subMagsF128( 181 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 182 float128_t 183 softfloat_mulAddF128( 184 uint_fast64_t, 185 uint_fast64_t, 186 uint_fast64_t, 187 uint_fast64_t, 188 uint_fast64_t, 189 uint_fast64_t, 190 uint_fast8_t 191 ); 192 193 #else 194 195 /*---------------------------------------------------------------------------- 196 *----------------------------------------------------------------------------*/ 197 198 bool 199 softfloat_tryPropagateNaNExtF80M( 200 const struct extFloat80M *, 201 const struct extFloat80M *, 202 struct extFloat80M * 203 ); 204 void softfloat_invalidExtF80M( struct extFloat80M * ); 205 206 int softfloat_normExtF80SigM( uint64_t * ); 207 208 void 209 softfloat_roundPackMToExtF80M( 210 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 211 void 212 softfloat_normRoundPackMToExtF80M( 213 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 214 215 void 216 softfloat_addExtF80M( 217 const struct extFloat80M *, 218 const struct extFloat80M *, 219 struct extFloat80M *, 220 bool 221 ); 222 223 int 224 softfloat_compareNonnormExtF80M( 225 const struct extFloat80M *, const struct extFloat80M * ); 226 227 /*---------------------------------------------------------------------------- 228 *----------------------------------------------------------------------------*/ 229 #define signF128UI96( a96 ) ((bool) ((uint32_t) (a96)>>31)) 230 #define expF128UI96( a96 ) ((int32_t) ((a96)>>16) & 0x7FFF) 231 #define fracF128UI96( a96 ) ((a96) & 0x0000FFFF) 232 #define packToF128UI96( sign, exp, sig96 ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<16) + (sig96)) 233 234 bool softfloat_isNaNF128M( const uint32_t * ); 235 236 bool 237 softfloat_tryPropagateNaNF128M( 238 const uint32_t *, const uint32_t *, uint32_t * ); 239 void softfloat_invalidF128M( uint32_t * ); 240 241 int softfloat_shiftNormSigF128M( const uint32_t *, uint_fast8_t, uint32_t * ); 242 243 void softfloat_roundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 244 void softfloat_normRoundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 245 246 void 247 softfloat_addF128M( const uint32_t *, const uint32_t *, uint32_t *, bool ); 248 void 249 softfloat_mulAddF128M( 250 const uint32_t *, 251 const uint32_t *, 252 const uint32_t *, 253 uint32_t *, 254 uint_fast8_t 255 ); 256 257 #endif 258 259 #endif 260 261