1 2 /*============================================================================ 3 4 This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic 5 Package, Release 3a, by John R. Hauser. 6 7 Copyright 2011, 2012, 2013, 2014 The Regents of the University of California. 8 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 union ui32_f32 { uint32_t ui; float32_t f; }; 46 union ui64_f64 { uint64_t ui; float64_t f; }; 47 48 #ifdef SOFTFLOAT_FAST_INT64 49 union extF80M_extF80 { struct extFloat80M fM; extFloat80_t f; }; 50 union ui128_f128 { struct uint128 ui; float128_t f; }; 51 #endif 52 53 enum { 54 softfloat_mulAdd_subC = 1, 55 softfloat_mulAdd_subProd = 2 56 }; 57 58 /*---------------------------------------------------------------------------- 59 *----------------------------------------------------------------------------*/ 60 uint_fast32_t 61 softfloat_roundPackToUI32( bool, uint_fast64_t, uint_fast8_t, bool ); 62 63 #ifdef SOFTFLOAT_FAST_INT64 64 uint_fast64_t 65 softfloat_roundPackToUI64( 66 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 67 #else 68 uint_fast64_t 69 softfloat_roundPackMToUI64( bool, uint32_t *, uint_fast8_t, bool ); 70 #endif 71 72 int_fast32_t 73 softfloat_roundPackToI32( bool, uint_fast64_t, uint_fast8_t, bool ); 74 75 #ifdef SOFTFLOAT_FAST_INT64 76 int_fast64_t 77 softfloat_roundPackToI64( 78 bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool ); 79 #else 80 int_fast64_t softfloat_roundPackMToI64( bool, uint32_t *, uint_fast8_t, bool ); 81 #endif 82 83 /*---------------------------------------------------------------------------- 84 *----------------------------------------------------------------------------*/ 85 #define signF32UI( a ) ((bool) ((uint32_t) (a)>>31)) 86 #define expF32UI( a ) ((int_fast16_t) ((a)>>23) & 0xFF) 87 #define fracF32UI( a ) ((a) & 0x007FFFFF) 88 #define packToF32UI( sign, exp, sig ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<23) + (sig)) 89 90 #define isNaNF32UI( a ) ((((a) & 0x7F800000) == 0x7F800000) && ((a) & 0x007FFFFF)) 91 92 struct exp16_sig32 { int_fast16_t exp; uint_fast32_t sig; }; 93 struct exp16_sig32 softfloat_normSubnormalF32Sig( uint_fast32_t ); 94 95 float32_t softfloat_roundPackToF32( bool, int_fast16_t, uint_fast32_t ); 96 float32_t softfloat_normRoundPackToF32( bool, int_fast16_t, uint_fast32_t ); 97 98 float32_t softfloat_addMagsF32( uint_fast32_t, uint_fast32_t, bool ); 99 float32_t softfloat_subMagsF32( uint_fast32_t, uint_fast32_t, bool ); 100 float32_t 101 softfloat_mulAddF32( 102 uint_fast32_t, uint_fast32_t, uint_fast32_t, uint_fast8_t ); 103 104 /*---------------------------------------------------------------------------- 105 *----------------------------------------------------------------------------*/ 106 #define signF64UI( a ) ((bool) ((uint64_t) (a)>>63)) 107 #define expF64UI( a ) ((int_fast16_t) ((a)>>52) & 0x7FF) 108 #define fracF64UI( a ) ((a) & UINT64_C( 0x000FFFFFFFFFFFFF )) 109 #define packToF64UI( sign, exp, sig ) ((uint64_t) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<52) + (sig))) 110 111 #define isNaNF64UI( a ) ((((a) & UINT64_C( 0x7FF0000000000000 )) == UINT64_C( 0x7FF0000000000000 )) && ((a) & UINT64_C( 0x000FFFFFFFFFFFFF ))) 112 113 struct exp16_sig64 { int_fast16_t exp; uint_fast64_t sig; }; 114 struct exp16_sig64 softfloat_normSubnormalF64Sig( uint_fast64_t ); 115 116 float64_t softfloat_roundPackToF64( bool, int_fast16_t, uint_fast64_t ); 117 float64_t softfloat_normRoundPackToF64( bool, int_fast16_t, uint_fast64_t ); 118 119 float64_t softfloat_addMagsF64( uint_fast64_t, uint_fast64_t, bool ); 120 float64_t softfloat_subMagsF64( uint_fast64_t, uint_fast64_t, bool ); 121 float64_t 122 softfloat_mulAddF64( 123 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 124 125 /*---------------------------------------------------------------------------- 126 *----------------------------------------------------------------------------*/ 127 #define signExtF80UI64( a64 ) ((bool) ((uint16_t) (a64)>>15)) 128 #define expExtF80UI64( a64 ) ((a64) & 0x7FFF) 129 #define packToExtF80UI64( sign, exp ) ((uint_fast16_t) (sign)<<15 | (exp)) 130 131 #define isNaNExtF80UI( a64, a0 ) ((((a64) & 0x7FFF) == 0x7FFF) && ((a0) & UINT64_C( 0x7FFFFFFFFFFFFFFF ))) 132 133 #ifdef SOFTFLOAT_FAST_INT64 134 135 /*---------------------------------------------------------------------------- 136 *----------------------------------------------------------------------------*/ 137 138 struct exp32_sig64 { int_fast32_t exp; uint64_t sig; }; 139 struct exp32_sig64 softfloat_normSubnormalExtF80Sig( uint_fast64_t ); 140 141 extFloat80_t 142 softfloat_roundPackToExtF80( 143 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 144 extFloat80_t 145 softfloat_normRoundPackToExtF80( 146 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t ); 147 148 extFloat80_t 149 softfloat_addMagsExtF80( 150 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 151 extFloat80_t 152 softfloat_subMagsExtF80( 153 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 154 155 /*---------------------------------------------------------------------------- 156 *----------------------------------------------------------------------------*/ 157 #define signF128UI64( a64 ) ((bool) ((uint64_t) (a64)>>63)) 158 #define expF128UI64( a64 ) ((int_fast32_t) ((a64)>>48) & 0x7FFF) 159 #define fracF128UI64( a64 ) ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )) 160 #define packToF128UI64( sign, exp, sig64 ) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<48) + (sig64)) 161 162 #define isNaNF128UI( a64, a0 ) ((((a64) & UINT64_C( 0x7FFF000000000000 )) == UINT64_C( 0x7FFF000000000000 )) && (a0 || ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF )))) 163 164 struct exp32_sig128 { int_fast32_t exp; struct uint128 sig; }; 165 struct exp32_sig128 166 softfloat_normSubnormalF128Sig( uint_fast64_t, uint_fast64_t ); 167 168 float128_t 169 softfloat_roundPackToF128( 170 bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast64_t ); 171 float128_t 172 softfloat_normRoundPackToF128( 173 bool, int_fast32_t, uint_fast64_t, uint_fast64_t ); 174 175 float128_t 176 softfloat_addMagsF128( 177 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 178 float128_t 179 softfloat_subMagsF128( 180 uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool ); 181 float128_t 182 softfloat_mulAddF128( 183 uint_fast64_t, 184 uint_fast64_t, 185 uint_fast64_t, 186 uint_fast64_t, 187 uint_fast64_t, 188 uint_fast64_t, 189 uint_fast8_t 190 ); 191 192 #else 193 194 /*---------------------------------------------------------------------------- 195 *----------------------------------------------------------------------------*/ 196 197 bool 198 softfloat_tryPropagateNaNExtF80M( 199 const struct extFloat80M *, 200 const struct extFloat80M *, 201 struct extFloat80M * 202 ); 203 void softfloat_invalidExtF80M( struct extFloat80M * ); 204 205 int softfloat_normExtF80SigM( uint64_t * ); 206 207 void 208 softfloat_roundPackMToExtF80M( 209 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 210 void 211 softfloat_normRoundPackMToExtF80M( 212 bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * ); 213 214 void 215 softfloat_addExtF80M( 216 const struct extFloat80M *, 217 const struct extFloat80M *, 218 struct extFloat80M *, 219 bool 220 ); 221 222 int 223 softfloat_compareNonnormExtF80M( 224 const struct extFloat80M *, const struct extFloat80M * ); 225 226 /*---------------------------------------------------------------------------- 227 *----------------------------------------------------------------------------*/ 228 #define signF128UI96( a96 ) ((bool) ((uint32_t) (a96)>>31)) 229 #define expF128UI96( a96 ) ((int32_t) ((a96)>>16) & 0x7FFF) 230 #define fracF128UI96( a96 ) ((a96) & 0x0000FFFF) 231 #define packToF128UI96( sign, exp, sig96 ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<16) + (sig96)) 232 233 bool softfloat_isNaNF128M( const uint32_t * ); 234 235 bool 236 softfloat_tryPropagateNaNF128M( 237 const uint32_t *, const uint32_t *, uint32_t * ); 238 void softfloat_invalidF128M( uint32_t * ); 239 240 int softfloat_shiftNormSigF128M( const uint32_t *, uint_fast8_t, uint32_t * ); 241 242 void softfloat_roundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 243 void softfloat_normRoundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * ); 244 245 void 246 softfloat_addF128M( const uint32_t *, const uint32_t *, uint32_t *, bool ); 247 void 248 softfloat_mulAddF128M( 249 const uint32_t *, 250 const uint32_t *, 251 const uint32_t *, 252 uint32_t *, 253 uint_fast8_t 254 ); 255 256 #endif 257 258 #endif 259 260