Upgrade to softfloat3e.
This should solve licensing problems as well.
This commit is contained in:
TC1995
154
src/cpu/softfloat3e/s_subMagsExtF80.cc
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154
src/cpu/softfloat3e/s_subMagsExtF80.cc
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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 "internals.h"
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#include "primitives.h"
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#include "specialize.h"
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#include "softfloat.h"
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extFloat80_t
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softfloat_subMagsExtF80(uint16_t uiA64, uint64_t uiA0, uint16_t uiB64, uint64_t uiB0, bool signZ, struct softfloat_status_t *status)
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{
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int32_t expA;
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uint64_t sigA;
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int32_t expB;
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uint64_t sigB;
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int32_t expDiff;
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int32_t expZ;
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uint64_t sigExtra;
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struct uint128 sig128;
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struct exp32_sig64 normExpSig;
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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expA = expExtF80UI64(uiA64);
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sigA = uiA0;
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expB = expExtF80UI64(uiB64);
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sigB = uiB0;
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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if (expA == 0x7FFF) {
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if ((sigA<<1)) goto propagateNaN;
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if (expB == 0x7FFF) {
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if ((sigB<<1)) goto propagateNaN;
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softfloat_raiseFlags(status, softfloat_flag_invalid);
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return packToExtF80_twoargs(defaultNaNExtF80UI64, defaultNaNExtF80UI0);
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}
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if (sigB && ! expB)
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softfloat_raiseFlags(status, softfloat_flag_denormal);
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return packToExtF80_twoargs(uiA64, uiA0);
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}
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if (expB == 0x7FFF) {
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if ((sigB<<1)) goto propagateNaN;
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if (sigA && ! expA)
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softfloat_raiseFlags(status, softfloat_flag_denormal);
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return packToExtF80(signZ ^ 1, 0x7FFF, UINT64_C(0x8000000000000000));
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}
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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if (! expA) {
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if (! sigA) {
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if (! expB) {
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if (sigB) {
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softfloat_raiseFlags(status, softfloat_flag_denormal);
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normExpSig = softfloat_normSubnormalExtF80Sig(sigB);
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expB = normExpSig.exp + 1;
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sigB = normExpSig.sig;
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return softfloat_roundPackToExtF80(signZ ^ 1, expB, sigB, 0, softfloat_extF80_roundingPrecision(status), status);
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}
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return packToExtF80((softfloat_getRoundingMode(status) == softfloat_round_min), 0, 0);
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}
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return softfloat_roundPackToExtF80(signZ ^ 1, expB, sigB, 0, softfloat_extF80_roundingPrecision(status), status);
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}
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softfloat_raiseFlags(status, softfloat_flag_denormal);
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normExpSig = softfloat_normSubnormalExtF80Sig(sigA);
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expA = normExpSig.exp + 1;
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sigA = normExpSig.sig;
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}
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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if (! expB) {
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if (! sigB)
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return softfloat_roundPackToExtF80(signZ, expA, sigA, 0, softfloat_extF80_roundingPrecision(status), status);
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softfloat_raiseFlags(status, softfloat_flag_denormal);
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normExpSig = softfloat_normSubnormalExtF80Sig(sigB);
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expB = normExpSig.exp + 1;
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sigB = normExpSig.sig;
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}
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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expDiff = expA - expB;
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if (0 < expDiff) goto expABigger;
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if (expDiff < 0) goto expBBigger;
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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expZ = expA;
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sigExtra = 0;
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if (sigB < sigA) goto aBigger;
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if (sigA < sigB) goto bBigger;
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return packToExtF80((softfloat_getRoundingMode(status) == softfloat_round_min), 0, 0);
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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expBBigger:
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sig128 = softfloat_shiftRightJam128(sigA, 0, -expDiff);
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sigA = sig128.v64;
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sigExtra = sig128.v0;
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expZ = expB;
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bBigger:
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signZ = ! signZ;
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sig128 = softfloat_sub128(sigB, 0, sigA, sigExtra);
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goto normRoundPack;
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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expABigger:
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sig128 = softfloat_shiftRightJam128(sigB, 0, expDiff);
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sigB = sig128.v64;
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sigExtra = sig128.v0;
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expZ = expA;
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aBigger:
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sig128 = softfloat_sub128(sigA, 0, sigB, sigExtra);
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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normRoundPack:
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return
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softfloat_normRoundPackToExtF80(
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signZ, expZ, sig128.v64, sig128.v0, softfloat_extF80_roundingPrecision(status), status);
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/*------------------------------------------------------------------------
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*------------------------------------------------------------------------*/
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propagateNaN:
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return softfloat_propagateNaNExtF80UI(uiA64, uiA0, uiB64, uiB0, status);
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}
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