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75 lines
2.7 KiB
C
75 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, 2015 The Regents of the University of
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California (Regents). All Rights Reserved. Redistribution and use in source
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and binary forms, with or without modification, are permitted provided that
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the following 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 <stdint.h>
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#include "platform.h"
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#include "primitiveTypes.h"
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#ifndef softfloat_shiftRightJam128Extra
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struct uint128_extra
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softfloat_shiftRightJam128Extra(
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uint64_t a64, uint64_t a0, uint64_t extra, uint_fast32_t count )
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{
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int_fast32_t negCount;
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struct uint128_extra z;
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negCount = -count;
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if ( count < 64 ) {
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z.v.v64 = a64>>count;
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z.v.v0 = a64<<(negCount & 63) | a0>>count;
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z.extra = a0<<(negCount & 63);
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} else {
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z.v.v64 = 0;
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if ( count == 64 ) {
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z.v.v0 = a64;
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z.extra = a0;
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} else {
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extra |= a0;
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if ( count < 128 ) {
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z.v.v0 = a64>>(count & 63);
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z.extra = a64<<(negCount & 63);
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} else {
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z.v.v0 = 0;
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z.extra = (count == 128) ? a64 : (a64 != 0);
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}
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}
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}
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z.extra |= (extra != 0);
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return z;
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}
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#endif
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