diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
commit | 16f504a9dca3fe3b70568f67b7d41241ae485288 (patch) | |
tree | c60f36ada0496ba928b7161059ba5ab1ab224f9d /src/libs/softfloat-3e/source/s_addMagsF32.c | |
parent | Initial commit. (diff) | |
download | virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.tar.xz virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.zip |
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/softfloat-3e/source/s_addMagsF32.c')
-rw-r--r-- | src/libs/softfloat-3e/source/s_addMagsF32.c | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/s_addMagsF32.c b/src/libs/softfloat-3e/source/s_addMagsF32.c new file mode 100644 index 00000000..803df7dc --- /dev/null +++ b/src/libs/softfloat-3e/source/s_addMagsF32.c @@ -0,0 +1,126 @@ + +/*============================================================================ + +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 <stdbool.h> +#include <stdint.h> +#include "platform.h" +#include "internals.h" +#include "specialize.h" + +float32_t softfloat_addMagsF32( uint_fast32_t uiA, uint_fast32_t uiB SOFTFLOAT_STATE_DECL_COMMA ) +{ + int_fast16_t expA; + uint_fast32_t sigA; + int_fast16_t expB; + uint_fast32_t sigB; + int_fast16_t expDiff; + uint_fast32_t uiZ; + bool signZ; + int_fast16_t expZ; + uint_fast32_t sigZ; + union ui32_f32 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expA = expF32UI( uiA ); + sigA = fracF32UI( uiA ); + expB = expF32UI( uiB ); + sigB = fracF32UI( uiB ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + expDiff = expA - expB; + if ( ! expDiff ) { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + if ( ! expA ) { + uiZ = uiA + sigB; + goto uiZ; + } + if ( expA == 0xFF ) { + if ( sigA | sigB ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + signZ = signF32UI( uiA ); + expZ = expA; + sigZ = 0x01000000 + sigA + sigB; + if ( ! (sigZ & 1) && (expZ < 0xFE) ) { + uiZ = packToF32UI( signZ, expZ, sigZ>>1 ); + goto uiZ; + } + sigZ <<= 6; + } else { + /*-------------------------------------------------------------------- + *--------------------------------------------------------------------*/ + signZ = signF32UI( uiA ); + sigA <<= 6; + sigB <<= 6; + if ( expDiff < 0 ) { + if ( expB == 0xFF ) { + if ( sigB ) goto propagateNaN; + uiZ = packToF32UI( signZ, 0xFF, 0 ); + goto uiZ; + } + expZ = expB; + sigA += expA ? 0x20000000 : sigA; + sigA = softfloat_shiftRightJam32( sigA, -expDiff ); + } else { + if ( expA == 0xFF ) { + if ( sigA ) goto propagateNaN; + uiZ = uiA; + goto uiZ; + } + expZ = expA; + sigB += expB ? 0x20000000 : sigB; + sigB = softfloat_shiftRightJam32( sigB, expDiff ); + } + sigZ = 0x20000000 + sigA + sigB; + if ( sigZ < 0x40000000 ) { + --expZ; + sigZ <<= 1; + } + } + return softfloat_roundPackToF32( signZ, expZ, sigZ SOFTFLOAT_STATE_ARG_COMMA ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + propagateNaN: + uiZ = softfloat_propagateNaNF32UI( uiA, uiB SOFTFLOAT_STATE_ARG_COMMA ); + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + |