John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 1 | |
| 2 | /*============================================================================ |
| 3 | |
| 4 | This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
John Hauser | f74b1e4 | 2018-01-26 12:51:15 -0800 | [diff] [blame] | 5 | Package, Release 3e, by John R. Hauser. |
John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 6 | |
John Hauser | ad6be28 | 2015-11-03 14:38:58 -0800 | [diff] [blame] | 7 | Copyright 2011, 2012, 2013, 2014 The Regents of the University of California. |
| 8 | All rights reserved. |
John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 9 | |
John Hauser | ad6be28 | 2015-11-03 14:38:58 -0800 | [diff] [blame] | 10 | Redistribution and use in source and binary forms, with or without |
| 11 | modification, are permitted provided that the following conditions are met: |
John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 12 | |
John Hauser | ad6be28 | 2015-11-03 14:38:58 -0800 | [diff] [blame] | 13 | 1. Redistributions of source code must retain the above copyright notice, |
| 14 | this list of conditions, and the following disclaimer. |
John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 15 | |
John Hauser | ad6be28 | 2015-11-03 14:38:58 -0800 | [diff] [blame] | 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. |
John Hauser | 8f59d92 | 2014-11-28 19:49:28 -0800 | [diff] [blame] | 34 | |
| 35 | =============================================================================*/ |
| 36 | |
| 37 | #include <stdbool.h> |
| 38 | #include <stdint.h> |
| 39 | #include "platform.h" |
| 40 | #include "internals.h" |
| 41 | #include "specialize.h" |
| 42 | #include "softfloat.h" |
| 43 | |
| 44 | bool extF80_eq( extFloat80_t a, extFloat80_t b ) |
| 45 | { |
| 46 | union { struct extFloat80M s; extFloat80_t f; } uA; |
| 47 | uint_fast16_t uiA64; |
| 48 | uint_fast64_t uiA0; |
| 49 | union { struct extFloat80M s; extFloat80_t f; } uB; |
| 50 | uint_fast16_t uiB64; |
| 51 | uint_fast64_t uiB0; |
| 52 | |
| 53 | uA.f = a; |
| 54 | uiA64 = uA.s.signExp; |
| 55 | uiA0 = uA.s.signif; |
| 56 | uB.f = b; |
| 57 | uiB64 = uB.s.signExp; |
| 58 | uiB0 = uB.s.signif; |
| 59 | if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) { |
| 60 | if ( |
| 61 | softfloat_isSigNaNExtF80UI( uiA64, uiA0 ) |
| 62 | || softfloat_isSigNaNExtF80UI( uiB64, uiB0 ) |
| 63 | ) { |
| 64 | softfloat_raiseFlags( softfloat_flag_invalid ); |
| 65 | } |
| 66 | return false; |
| 67 | } |
| 68 | return |
| 69 | (uiA0 == uiB0) |
| 70 | && ((uiA64 == uiB64) || (! uiA0 && ! ((uiA64 | uiB64) & 0x7FFF))); |
| 71 | |
| 72 | } |
| 73 | |