mirror of
https://github.com/openhwgroup/cvw
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139 lines
4.2 KiB
C
139 lines
4.2 KiB
C
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/*============================================================================
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This C header file is part of TestFloat, Release 3e, a package of programs for
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testing the correctness of floating-point arithmetic complying with the IEEE
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Standard for Floating-Point, by John R. Hauser.
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Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the
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University of 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 <stdbool.h>
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#include <stdint.h>
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#include "platform.h"
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#include "uint128.h"
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#include "softfloat.h"
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#ifdef FLOAT16
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bool f16_same( float16_t a, float16_t b )
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{
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union { uint16_t ui; float16_t f; } uA, uB;
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uA.f = a;
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uB.f = b;
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return (uA.ui == uB.ui);
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}
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bool f16_isNaN( float16_t a )
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{
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union { uint16_t ui; float16_t f; } uA;
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uA.f = a;
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return 0x7C00 < (uA.ui & 0x7FFF);
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}
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#endif
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bool f32_same( float32_t a, float32_t b )
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{
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union { uint32_t ui; float32_t f; } uA, uB;
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uA.f = a;
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uB.f = b;
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return (uA.ui == uB.ui);
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}
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bool f32_isNaN( float32_t a )
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{
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union { uint32_t ui; float32_t f; } uA;
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uA.f = a;
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return 0x7F800000 < (uA.ui & 0x7FFFFFFF);
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}
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#ifdef FLOAT64
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bool f64_same( float64_t a, float64_t b )
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{
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union { uint64_t ui; float64_t f; } uA, uB;
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uA.f = a;
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uB.f = b;
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return (uA.ui == uB.ui);
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}
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bool f64_isNaN( float64_t a )
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{
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union { uint64_t ui; float64_t f; } uA;
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uA.f = a;
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return
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UINT64_C( 0x7FF0000000000000 )
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< (uA.ui & UINT64_C( 0x7FFFFFFFFFFFFFFF ));
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}
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#endif
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#ifdef EXTFLOAT80
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bool extF80M_same( const extFloat80_t *aPtr, const extFloat80_t *bPtr )
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{
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const struct extFloat80M *aSPtr = (const struct extFloat80M *) aPtr;
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const struct extFloat80M *bSPtr = (const struct extFloat80M *) bPtr;
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return
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(aSPtr->signExp == bSPtr->signExp) && (aSPtr->signif == bSPtr->signif);
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}
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bool extF80M_isNaN( const extFloat80_t *aPtr )
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{
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const struct extFloat80M *aSPtr = (const struct extFloat80M *) aPtr;
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return
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((aSPtr->signExp & 0x7FFF) == 0x7FFF)
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&& (aSPtr->signif & UINT64_C( 0x7FFFFFFFFFFFFFFF ));
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}
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#endif
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#ifdef FLOAT128
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bool f128M_same( const float128_t *aPtr, const float128_t *bPtr )
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{
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const struct uint128 *uiAPtr = (const struct uint128 *) aPtr;
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const struct uint128 *uiBPtr = (const struct uint128 *) bPtr;
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return (uiAPtr->v64 == uiBPtr->v64) && (uiAPtr->v0 == uiBPtr->v0);
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}
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bool f128M_isNaN( const float128_t *aPtr )
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{
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const struct uint128 *uiAPtr = (const struct uint128 *) aPtr;
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uint_fast64_t absA64 = uiAPtr->v64 & UINT64_C( 0x7FFFFFFFFFFFFFFF );
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return
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(UINT64_C( 0x7FFF000000000000 ) < absA64)
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|| ((absA64 == UINT64_C( 0x7FFF000000000000 )) && uiAPtr->v0);
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}
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#endif
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