forked from Github_Repos/cvw
72 lines
2.7 KiB
C
72 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 3e, 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. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions, and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions, and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the University nor the names of its contributors may
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be used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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=============================================================================*/
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#include <stdint.h>
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#include "platform.h"
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#ifndef softfloat_mul128To256M
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#define softfloat_mul128To256M softfloat_mul128To256M
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#include "primitives.h"
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void
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softfloat_mul128To256M(
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uint64_t a64, uint64_t a0, uint64_t b64, uint64_t b0, uint64_t *zPtr )
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{
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struct uint128 p0, p64, p128;
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uint_fast64_t z64, z128, z192;
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p0 = softfloat_mul64To128( a0, b0 );
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zPtr[indexWord( 4, 0 )] = p0.v0;
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p64 = softfloat_mul64To128( a64, b0 );
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z64 = p64.v0 + p0.v64;
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z128 = p64.v64 + (z64 < p64.v0);
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p128 = softfloat_mul64To128( a64, b64 );
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z128 += p128.v0;
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z192 = p128.v64 + (z128 < p128.v0);
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p64 = softfloat_mul64To128( a0, b64 );
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z64 += p64.v0;
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zPtr[indexWord( 4, 1 )] = z64;
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p64.v64 += (z64 < p64.v0);
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z128 += p64.v64;
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zPtr[indexWord( 4, 2 )] = z128;
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zPtr[indexWord( 4, 3 )] = z192 + (z128 < p64.v64);
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}
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#endif
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