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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/libs/softfloat-3e/source/extF80M_mul.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/softfloat-3e/source/extF80M_mul.c')
-rw-r--r-- | src/libs/softfloat-3e/source/extF80M_mul.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/extF80M_mul.c b/src/libs/softfloat-3e/source/extF80M_mul.c new file mode 100644 index 00000000..92464c4d --- /dev/null +++ b/src/libs/softfloat-3e/source/extF80M_mul.c @@ -0,0 +1,139 @@ + +/*============================================================================ + +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 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 <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "specialize.h" +#include "softfloat.h" + +#ifdef SOFTFLOAT_FAST_INT64 + +void + extF80M_mul( + const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr SOFTFLOAT_STATE_DECL_COMMA ) +{ + + *zPtr = extF80_mul( *aPtr, *bPtr SOFTFLOAT_STATE_ARG_COMMA ); + +} + +#else + +void + extF80M_mul( + const extFloat80_t *aPtr, const extFloat80_t *bPtr, extFloat80_t *zPtr SOFTFLOAT_STATE_DECL_COMMA ) +{ + const struct extFloat80M *aSPtr, *bSPtr; + struct extFloat80M *zSPtr; + uint_fast16_t uiA64; + int32_t expA; + uint_fast16_t uiB64; + int32_t expB; + bool signZ; + uint_fast16_t exp, uiZ64; + uint64_t uiZ0, sigA, sigB; + int32_t expZ; + uint32_t sigProd[4], *extSigZPtr; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + aSPtr = (const struct extFloat80M *) aPtr; + bSPtr = (const struct extFloat80M *) bPtr; + zSPtr = (struct extFloat80M *) zPtr; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uiA64 = aSPtr->signExp; + expA = expExtF80UI64( uiA64 ); + uiB64 = bSPtr->signExp; + expB = expExtF80UI64( uiB64 ); + signZ = signExtF80UI64( uiA64 ) ^ signExtF80UI64( uiB64 ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( (expA == 0x7FFF) || (expB == 0x7FFF) ) { + if ( softfloat_tryPropagateNaNExtF80M( aSPtr, bSPtr, zSPtr SOFTFLOAT_STATE_ARG_COMMA ) ) return; + if ( + (! aSPtr->signif && (expA != 0x7FFF)) + || (! bSPtr->signif && (expB != 0x7FFF)) + ) { + softfloat_invalidExtF80M( zSPtr SOFTFLOAT_STATE_ARG_COMMA ); + return; + } + uiZ64 = packToExtF80UI64( signZ, 0x7FFF ); + uiZ0 = UINT64_C( 0x8000000000000000 ); + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( ! expA ) expA = 1; + sigA = aSPtr->signif; + if ( ! (sigA & UINT64_C( 0x8000000000000000 )) ) { + if ( ! sigA ) goto zero; + expA += softfloat_normExtF80SigM( &sigA ); + } + if ( ! expB ) expB = 1; + sigB = bSPtr->signif; + if ( ! (sigB & UINT64_C( 0x8000000000000000 )) ) { + if ( ! sigB ) goto zero; + expB += softfloat_normExtF80SigM( &sigB ); + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expZ = expA + expB - 0x3FFE; + softfloat_mul64To128M( sigA, sigB, sigProd ); + if ( sigProd[indexWordLo( 4 )] ) sigProd[indexWord( 4, 1 )] |= 1; + extSigZPtr = &sigProd[indexMultiwordHi( 4, 3 )]; + if ( sigProd[indexWordHi( 4 )] < 0x80000000 ) { + --expZ; + softfloat_add96M( extSigZPtr, extSigZPtr, extSigZPtr ); + } + softfloat_roundPackMToExtF80M( + signZ, expZ, extSigZPtr, extF80_roundingPrecision, zSPtr SOFTFLOAT_STATE_ARG_COMMA ); + return; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + zero: + uiZ64 = packToExtF80UI64( signZ, 0 ); + uiZ0 = 0; + uiZ: + zSPtr->signExp = uiZ64; + zSPtr->signif = uiZ0; + +} + +#endif + |