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71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
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/*============================================================================
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This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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Package, Release 3, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014 The Regents of the University of California
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(Regents). All Rights Reserved. Redistribution and use in source and binary
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forms, with or without modification, are permitted provided that the following
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conditions are met:
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Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer.
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Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following two paragraphs of disclaimer in the
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documentation and/or other materials provided with the distribution. Neither
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the name of the Regents nor the names of its contributors may be used to
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endorse or promote products derived from this software without specific prior
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written permission.
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IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
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SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING
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OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS
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BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED
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HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE
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MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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=============================================================================*/
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#include <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "internals.h"
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#include "specialize.h"
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#include "softfloat.h"
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bool extF80_lt( extFloat80_t a, extFloat80_t b )
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{
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union { struct extFloat80M s; extFloat80_t f; } uA;
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uint_fast16_t uiA64;
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uint_fast64_t uiA0;
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union { struct extFloat80M s; extFloat80_t f; } uB;
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uint_fast16_t uiB64;
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uint_fast64_t uiB0;
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bool signA, signB;
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uA.f = a;
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uiA64 = uA.s.signExp;
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uiA0 = uA.s.signif;
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uB.f = b;
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uiB64 = uB.s.signExp;
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uiB0 = uB.s.signif;
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if ( isNaNExtF80UI( uiA64, uiA0 ) || isNaNExtF80UI( uiB64, uiB0 ) ) {
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softfloat_raiseFlags( softfloat_flag_invalid );
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return false;
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}
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signA = signExtF80UI64( uiA64 );
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signB = signExtF80UI64( uiB64 );
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return
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(signA != signB)
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? signA && (((uiA64 | uiB64) & 0x7FFF) | uiA0 | uiB0)
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: ((uiA64 != uiB64) || (uiA0 != uiB0))
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&& (signA ^ softfloat_lt128( uiA64, uiA0, uiB64, uiB0 ));
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}
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