From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/libs/softfloat-3e/source/s_mulAddF32.c | 224 +++++++++++++++++++++++++++++ 1 file changed, 224 insertions(+) create mode 100644 src/libs/softfloat-3e/source/s_mulAddF32.c (limited to 'src/libs/softfloat-3e/source/s_mulAddF32.c') diff --git a/src/libs/softfloat-3e/source/s_mulAddF32.c b/src/libs/softfloat-3e/source/s_mulAddF32.c new file mode 100644 index 00000000..19a75131 --- /dev/null +++ b/src/libs/softfloat-3e/source/s_mulAddF32.c @@ -0,0 +1,224 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3e, by John R. Hauser. + +Copyright 2011, 2012, 2013, 2014, 2015, 2016 The Regents of the University of +California. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + 1. Redistributions of source code must retain the above copyright notice, + this list of conditions, and the following disclaimer. + + 2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions, and the following disclaimer in the documentation + and/or other materials provided with the distribution. + + 3. Neither the name of the University nor the names of its contributors may + be used to endorse or promote products derived from this software without + specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY +EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE +DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +=============================================================================*/ + +#include +#include +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" + +float32_t + softfloat_mulAddF32( + uint_fast32_t uiA, uint_fast32_t uiB, uint_fast32_t uiC, uint_fast8_t op SOFTFLOAT_STATE_DECL_COMMA ) +{ + bool signA; + int_fast16_t expA; + uint_fast32_t sigA; + bool signB; + int_fast16_t expB; + uint_fast32_t sigB; + bool signC; + int_fast16_t expC; + uint_fast32_t sigC; + bool signProd; + uint_fast32_t magBits, uiZ; + struct exp16_sig32 normExpSig; + int_fast16_t expProd; + uint_fast64_t sigProd; + bool signZ; + int_fast16_t expZ; + uint_fast32_t sigZ; + int_fast16_t expDiff; + uint_fast64_t sig64Z, sig64C; + int_fast8_t shiftDist; + union ui32_f32 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + signA = signF32UI( uiA ); + expA = expF32UI( uiA ); + sigA = fracF32UI( uiA ); + signB = signF32UI( uiB ); + expB = expF32UI( uiB ); + sigB = fracF32UI( uiB ); + signC = signF32UI( uiC ) ^ (op == softfloat_mulAdd_subC); + expC = expF32UI( uiC ); + sigC = fracF32UI( uiC ); + signProd = signA ^ signB ^ (op == softfloat_mulAdd_subProd); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( expA == 0xFF ) { + if ( sigA || ((expB == 0xFF) && sigB) ) goto propagateNaN_ABC; + magBits = expB | sigB; + goto infProdArg; + } + if ( expB == 0xFF ) { + if ( sigB ) goto propagateNaN_ABC; + magBits = expA | sigA; + goto infProdArg; + } + if ( expC == 0xFF ) { + if ( sigC ) { + uiZ = 0; + goto propagateNaN_ZC; + } + uiZ = uiC; + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( ! expA ) { + if ( ! sigA ) goto zeroProd; + normExpSig = softfloat_normSubnormalF32Sig( sigA ); + expA = normExpSig.exp; + sigA = normExpSig.sig; + } + if ( ! expB ) { + if ( ! sigB ) goto zeroProd; + normExpSig = softfloat_normSubnormalF32Sig( sigB ); + expB = normExpSig.exp; + sigB = normExpSig.sig; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expProd = expA + expB - 0x7E; + sigA = (sigA | 0x00800000)<<7; + sigB = (sigB | 0x00800000)<<7; + sigProd = (uint_fast64_t) sigA * sigB; + if ( sigProd < UINT64_C( 0x2000000000000000 ) ) { + --expProd; + sigProd <<= 1; + } + signZ = signProd; + if ( ! expC ) { + if ( ! sigC ) { + expZ = expProd - 1; + sigZ = softfloat_shortShiftRightJam64( sigProd, 31 ); + goto roundPack; + } + normExpSig = softfloat_normSubnormalF32Sig( sigC ); + expC = normExpSig.exp; + sigC = normExpSig.sig; + } + sigC = (sigC | 0x00800000)<<6; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expDiff = expProd - expC; + if ( signProd == signC ) { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + if ( expDiff <= 0 ) { + expZ = expC; + sigZ = sigC + softfloat_shiftRightJam64( sigProd, 32 - expDiff ); + } else { + expZ = expProd; + sig64Z = + sigProd + + softfloat_shiftRightJam64( + (uint_fast64_t) sigC<<32, expDiff ); + sigZ = softfloat_shortShiftRightJam64( sig64Z, 32 ); + } + if ( sigZ < 0x40000000 ) { + --expZ; + sigZ <<= 1; + } + } else { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + sig64C = (uint_fast64_t) sigC<<32; + if ( expDiff < 0 ) { + signZ = signC; + expZ = expC; + sig64Z = sig64C - softfloat_shiftRightJam64( sigProd, -expDiff ); + } else if ( ! expDiff ) { + expZ = expProd; + sig64Z = sigProd - sig64C; + if ( ! sig64Z ) goto completeCancellation; + if ( sig64Z & UINT64_C( 0x8000000000000000 ) ) { + signZ = ! signZ; + sig64Z = -sig64Z; + } + } else { + expZ = expProd; + sig64Z = sigProd - softfloat_shiftRightJam64( sig64C, expDiff ); + } + shiftDist = softfloat_countLeadingZeros64( sig64Z ) - 1; + expZ -= shiftDist; + shiftDist -= 32; + if ( shiftDist < 0 ) { + sigZ = softfloat_shortShiftRightJam64( sig64Z, -shiftDist ); + } else { + sigZ = (uint_fast32_t) sig64Z<