| |
| /*============================================================================ |
| |
| 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 "softfloat.h" |
| |
| #ifdef SOFTFLOAT_FAST_INT64 |
| |
| bool extF80M_lt( const extFloat80_t *aPtr, const extFloat80_t *bPtr ) |
| { |
| |
| return extF80_lt( *aPtr, *bPtr ); |
| |
| } |
| |
| #else |
| |
| bool extF80M_lt( const extFloat80_t *aPtr, const extFloat80_t *bPtr ) |
| { |
| const struct extFloat80M *aSPtr, *bSPtr; |
| uint_fast16_t uiA64; |
| uint64_t uiA0; |
| uint_fast16_t uiB64; |
| uint64_t uiB0; |
| bool signA, ltMags; |
| |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| aSPtr = (const struct extFloat80M *) aPtr; |
| bSPtr = (const struct extFloat80M *) bPtr; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uiA64 = aSPtr->signExp; |
| uiA0 = aSPtr->signif; |
| uiB64 = bSPtr->signExp; |
| uiB0 = bSPtr->signif; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) { |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| return false; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| signA = signExtF80UI64( uiA64 ); |
| if ( (uiA64 ^ uiB64) & 0x8000 ) { |
| /*-------------------------------------------------------------------- |
| | Signs are different. |
| *--------------------------------------------------------------------*/ |
| return signA && ((uiA0 | uiB0) != 0); |
| } else { |
| /*-------------------------------------------------------------------- |
| | Signs are the same. |
| *--------------------------------------------------------------------*/ |
| if ( ! ((uiA0 & uiB0) & UINT64_C( 0x8000000000000000 )) ) { |
| return (softfloat_compareNonnormExtF80M( aSPtr, bSPtr ) < 0); |
| } |
| if ( uiA64 == uiB64 ) { |
| if ( uiA0 == uiB0 ) return false; |
| ltMags = (uiA0 < uiB0); |
| } else { |
| ltMags = (uiA64 < uiB64); |
| } |
| return signA ^ ltMags; |
| } |
| |
| } |
| |
| #endif |
| |