| |
| /*============================================================================ |
| |
| 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 <stdint.h> |
| #include "platform.h" |
| #include "internals.h" |
| #include "softfloat_types.h" |
| |
| int |
| softfloat_compareNonnormExtF80M( |
| const struct extFloat80M *aSPtr, const struct extFloat80M *bSPtr ) |
| { |
| uint_fast16_t uiA64, uiB64; |
| uint64_t sigA; |
| bool signB; |
| uint64_t sigB; |
| int32_t expA, expB; |
| |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uiA64 = aSPtr->signExp; |
| uiB64 = bSPtr->signExp; |
| sigA = aSPtr->signif; |
| signB = signExtF80UI64( uiB64 ); |
| sigB = bSPtr->signif; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( (uiA64 ^ uiB64) & 0x8000 ) { |
| if ( ! (sigA | sigB) ) return 0; |
| goto resultFromSignB; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| expA = expExtF80UI64( uiA64 ); |
| expB = expExtF80UI64( uiB64 ); |
| if ( expA == 0x7FFF ) { |
| if (expB == 0x7FFF) return 0; |
| signB = ! signB; |
| goto resultFromSignB; |
| } |
| if ( expB == 0x7FFF ) { |
| goto resultFromSignB; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( ! expA ) expA = 1; |
| if ( ! (sigA & UINT64_C( 0x8000000000000000 )) ) { |
| if ( sigA ) { |
| expA += softfloat_normExtF80SigM( &sigA ); |
| } else { |
| expA = -128; |
| } |
| } |
| if ( ! expB ) expB = 1; |
| if ( ! (sigB & UINT64_C( 0x8000000000000000 )) ) { |
| if ( sigB ) { |
| expB += softfloat_normExtF80SigM( &sigB ); |
| } else { |
| expB = -128; |
| } |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( signB ) { |
| if ( expA < expB ) return 1; |
| if ( (expB < expA) || (sigB < sigA) ) return -1; |
| } else { |
| if ( expB < expA ) return 1; |
| if ( (expA < expB) || (sigA < sigB) ) return -1; |
| } |
| return (sigA != sigB); |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| resultFromSignB: |
| return signB ? 1 : -1; |
| |
| } |
| |