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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/f64_to_extF80.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/f64_to_extF80.c')
-rw-r--r-- | src/libs/softfloat-3e/source/f64_to_extF80.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/f64_to_extF80.c b/src/libs/softfloat-3e/source/f64_to_extF80.c new file mode 100644 index 00000000..cd0fa062 --- /dev/null +++ b/src/libs/softfloat-3e/source/f64_to_extF80.c @@ -0,0 +1,101 @@ + +/*============================================================================ + +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 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" + +extFloat80_t f64_to_extF80( float64_t a SOFTFLOAT_STATE_DECL_COMMA ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + bool sign; + int_fast16_t exp; + uint_fast64_t frac; + struct commonNaN commonNaN; + struct uint128 uiZ; + uint_fast16_t uiZ64; + uint_fast64_t uiZ0; + struct exp16_sig64 normExpSig; + union { struct extFloat80M s; extFloat80_t f; } uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uA.f = a; + uiA = uA.ui; + sign = signF64UI( uiA ); + exp = expF64UI( uiA ); + frac = fracF64UI( uiA ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( exp == 0x7FF ) { + if ( frac ) { + softfloat_f64UIToCommonNaN( uiA, &commonNaN SOFTFLOAT_STATE_ARG_COMMA ); + uiZ = softfloat_commonNaNToExtF80UI( &commonNaN ); + uiZ64 = uiZ.v64; + uiZ0 = uiZ.v0; + } else { + uiZ64 = packToExtF80UI64( sign, 0x7FFF ); + uiZ0 = UINT64_C( 0x8000000000000000 ); + } + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( ! exp ) { + if ( ! frac ) { + uiZ64 = packToExtF80UI64( sign, 0 ); + uiZ0 = 0; + goto uiZ; + } + normExpSig = softfloat_normSubnormalF64Sig( frac ); + exp = normExpSig.exp; + frac = normExpSig.sig; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uiZ64 = packToExtF80UI64( sign, exp + 0x3C00 ); + uiZ0 = (frac | UINT64_C( 0x0010000000000000 ))<<11; + uiZ: + uZ.s.signExp = uiZ64; + uZ.s.signif = uiZ0; + return uZ.f; + +} + |