1 // SPDX-License-Identifier: BSD-3-Clause 2 3 /*============================================================================ 4 5 This C source 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 #include <stdbool.h> 39 #include "platform.h" 40 #include "internals.h" 41 #include "softfloat.h" 42 43 #ifdef SOFTFLOAT_FAST_INT64 44 45 void extF80M_sub(const extFloat80_t * aPtr,const extFloat80_t * bPtr,extFloat80_t * zPtr)46 extF80M_sub( 47 const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr ) 48 { 49 const struct extFloat80M *aSPtr, *bSPtr; 50 uint_fast16_t uiA64; 51 uint_fast64_t uiA0; 52 bool signA; 53 uint_fast16_t uiB64; 54 uint_fast64_t uiB0; 55 bool signB; 56 #if ! defined INLINE_LEVEL || (INLINE_LEVEL < 2) 57 extFloat80_t 58 (*magsFuncPtr)( 59 uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool ); 60 #endif 61 62 aSPtr = (const struct extFloat80M *) aPtr; 63 bSPtr = (const struct extFloat80M *) bPtr; 64 uiA64 = aSPtr->signExp; 65 uiA0 = aSPtr->signif; 66 signA = signExtF80UI64( uiA64 ); 67 uiB64 = bSPtr->signExp; 68 uiB0 = bSPtr->signif; 69 signB = signExtF80UI64( uiB64 ); 70 #if defined INLINE_LEVEL && (2 <= INLINE_LEVEL) 71 if ( signA == signB ) { 72 *zPtr = softfloat_subMagsExtF80( uiA64, uiA0, uiB64, uiB0, signA ); 73 } else { 74 *zPtr = softfloat_addMagsExtF80( uiA64, uiA0, uiB64, uiB0, signA ); 75 } 76 #else 77 magsFuncPtr = 78 (signA == signB) ? softfloat_subMagsExtF80 : softfloat_addMagsExtF80; 79 *zPtr = (*magsFuncPtr)( uiA64, uiA0, uiB64, uiB0, signA ); 80 #endif 81 82 } 83 84 #else 85 86 void extF80M_sub(const extFloat80_t * aPtr,const extFloat80_t * bPtr,extFloat80_t * zPtr)87 extF80M_sub( 88 const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr ) 89 { 90 91 softfloat_addExtF80M( 92 (const struct extFloat80M *) aPtr, 93 (const struct extFloat80M *) bPtr, 94 (struct extFloat80M *) zPtr, 95 true 96 ); 97 98 } 99 100 #endif 101 102