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https://github.com/openhwgroup/cvw
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115 lines
4.0 KiB
C
115 lines
4.0 KiB
C
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/*============================================================================
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This C header 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 2017 The Regents of the University of California. All rights
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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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#ifndef opts_GCC_h
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#define opts_GCC_h 1
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#ifdef INLINE
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#include <stdint.h>
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#include "primitiveTypes.h"
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#ifdef SOFTFLOAT_BUILTIN_CLZ
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INLINE uint_fast8_t softfloat_countLeadingZeros16( uint16_t a )
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{ return a ? __builtin_clz( a ) - 16 : 16; }
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#define softfloat_countLeadingZeros16 softfloat_countLeadingZeros16
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INLINE uint_fast8_t softfloat_countLeadingZeros32( uint32_t a )
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{ return a ? __builtin_clz( a ) : 32; }
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#define softfloat_countLeadingZeros32 softfloat_countLeadingZeros32
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INLINE uint_fast8_t softfloat_countLeadingZeros64( uint64_t a )
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{ return a ? __builtin_clzll( a ) : 64; }
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#define softfloat_countLeadingZeros64 softfloat_countLeadingZeros64
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#endif
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#ifdef SOFTFLOAT_INTRINSIC_INT128
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INLINE struct uint128 softfloat_mul64ByShifted32To128( uint64_t a, uint32_t b )
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{
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union { unsigned __int128 ui; struct uint128 s; } uZ;
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uZ.ui = (unsigned __int128) a * ((uint_fast64_t) b<<32);
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return uZ.s;
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}
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#define softfloat_mul64ByShifted32To128 softfloat_mul64ByShifted32To128
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INLINE struct uint128 softfloat_mul64To128( uint64_t a, uint64_t b )
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{
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union { unsigned __int128 ui; struct uint128 s; } uZ;
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uZ.ui = (unsigned __int128) a * b;
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return uZ.s;
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}
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#define softfloat_mul64To128 softfloat_mul64To128
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INLINE
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struct uint128 softfloat_mul128By32( uint64_t a64, uint64_t a0, uint32_t b )
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{
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union { unsigned __int128 ui; struct uint128 s; } uZ;
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uZ.ui = ((unsigned __int128) a64<<64 | a0) * b;
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return uZ.s;
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}
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#define softfloat_mul128By32 softfloat_mul128By32
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INLINE
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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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unsigned __int128 z0, mid1, mid, z128;
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z0 = (unsigned __int128) a0 * b0;
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mid1 = (unsigned __int128) a64 * b0;
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mid = mid1 + (unsigned __int128) a0 * b64;
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z128 = (unsigned __int128) a64 * b64;
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z128 += (unsigned __int128) (mid < mid1)<<64 | mid>>64;
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mid <<= 64;
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z0 += mid;
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z128 += (z0 < mid);
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zPtr[indexWord( 4, 0 )] = z0;
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zPtr[indexWord( 4, 1 )] = z0>>64;
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zPtr[indexWord( 4, 2 )] = z128;
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zPtr[indexWord( 4, 3 )] = z128>>64;
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}
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#define softfloat_mul128To256M softfloat_mul128To256M
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#endif
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#endif
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#endif
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