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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_to_f32.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_to_f32.c')
-rw-r--r-- | src/libs/softfloat-3e/source/extF80M_to_f32.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/libs/softfloat-3e/source/extF80M_to_f32.c b/src/libs/softfloat-3e/source/extF80M_to_f32.c new file mode 100644 index 00000000..bd0e2e66 --- /dev/null +++ b/src/libs/softfloat-3e/source/extF80M_to_f32.c @@ -0,0 +1,112 @@ + +/*============================================================================ + +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" + +#ifdef SOFTFLOAT_FAST_INT64 + +float32_t extF80M_to_f32( const extFloat80_t *aPtr SOFTFLOAT_STATE_DECL_COMMA ) +{ + + return extF80_to_f32( *aPtr SOFTFLOAT_STATE_ARG_COMMA ); + +} + +#else + +float32_t extF80M_to_f32( const extFloat80_t *aPtr SOFTFLOAT_STATE_DECL_COMMA ) +{ + const struct extFloat80M *aSPtr; + uint_fast16_t uiA64; + bool sign; + int32_t exp; + uint64_t sig; + struct commonNaN commonNaN; + uint32_t uiZ, sig32; + union ui32_f32 uZ; + + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + aSPtr = (const struct extFloat80M *) aPtr; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uiA64 = aSPtr->signExp; + sign = signExtF80UI64( uiA64 ); + exp = expExtF80UI64( uiA64 ); + sig = aSPtr->signif; + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( exp == 0x7FFF ) { + if ( sig & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) { + softfloat_extF80MToCommonNaN( aSPtr, &commonNaN SOFTFLOAT_STATE_ARG_COMMA ); + uiZ = softfloat_commonNaNToF32UI( &commonNaN ); + } else { + uiZ = packToF32UI( sign, 0xFF, 0 ); + } + goto uiZ; + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + if ( ! (sig & UINT64_C( 0x8000000000000000 )) ) { + if ( ! sig ) { + uiZ = packToF32UI( sign, 0, 0 ); + goto uiZ; + } + exp += softfloat_normExtF80SigM( &sig ); + } + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + sig32 = softfloat_shortShiftRightJam64( sig, 33 ); + exp -= 0x3F81; + if ( sizeof (int_fast16_t) < sizeof (int32_t) ) { + if ( exp < -0x1000 ) exp = -0x1000; + } + return softfloat_roundPackToF32( sign, exp, sig32 SOFTFLOAT_STATE_ARG_COMMA ); + /*------------------------------------------------------------------------ + *------------------------------------------------------------------------*/ + uiZ: + uZ.ui = uiZ; + return uZ.f; + +} + +#endif + |