| |
| /*============================================================================ |
| |
| This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
| Package, Release 3, by John R. Hauser. |
| |
| Copyright 2011, 2012, 2013, 2014 The Regents of the University of California |
| (Regents). All Rights Reserved. Redistribution and use in source and binary |
| forms, with or without modification, are permitted provided that the following |
| conditions are met: |
| |
| Redistributions of source code must retain the above copyright notice, |
| this list of conditions, and the following two paragraphs of disclaimer. |
| Redistributions in binary form must reproduce the above copyright notice, |
| this list of conditions, and the following two paragraphs of disclaimer in the |
| documentation and/or other materials provided with the distribution. Neither |
| the name of the Regents nor the names of its contributors may be used to |
| endorse or promote products derived from this software without specific prior |
| written permission. |
| |
| IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
| SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING |
| OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS |
| BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED |
| TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED |
| HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE |
| MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| |
| =============================================================================*/ |
| |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include "platform.h" |
| #include "internals.h" |
| #include "specialize.h" |
| #include "softfloat.h" |
| |
| #ifdef SOFTFLOAT_FAST_INT64 |
| |
| bool f128M_eq_signaling( const float128_t *aPtr, const float128_t *bPtr ) |
| { |
| |
| return f128_eq_signaling( *aPtr, *bPtr ); |
| |
| } |
| |
| #else |
| |
| bool f128M_eq_signaling( const float128_t *aPtr, const float128_t *bPtr ) |
| { |
| const uint32_t *aWPtr, *bWPtr; |
| uint32_t wordA, wordB, uiA96, uiB96; |
| bool possibleOppositeZeros; |
| uint32_t mashWord; |
| |
| aWPtr = (const uint32_t *) aPtr; |
| bWPtr = (const uint32_t *) bPtr; |
| if ( softfloat_isNaNF128M( aWPtr ) || softfloat_isNaNF128M( bWPtr ) ) { |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| return false; |
| } |
| wordA = aWPtr[indexWord( 4, 2 )]; |
| wordB = bWPtr[indexWord( 4, 2 )]; |
| if ( wordA != wordB ) return false; |
| uiA96 = aWPtr[indexWordHi( 4 )]; |
| uiB96 = bWPtr[indexWordHi( 4 )]; |
| possibleOppositeZeros = false; |
| if ( uiA96 != uiB96 ) { |
| possibleOppositeZeros = (((uiA96 | uiB96) & 0x7FFFFFFF) == 0); |
| if ( ! possibleOppositeZeros ) return false; |
| } |
| mashWord = wordA | wordB; |
| wordA = aWPtr[indexWord( 4, 1 )]; |
| wordB = bWPtr[indexWord( 4, 1 )]; |
| if ( wordA != wordB ) return false; |
| mashWord |= wordA | wordB; |
| wordA = aWPtr[indexWord( 4, 0 )]; |
| wordB = bWPtr[indexWord( 4, 0 )]; |
| return |
| (wordA == wordB) |
| && (! possibleOppositeZeros || ((mashWord | wordA | wordB) == 0)); |
| |
| } |
| |
| #endif |
| |