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author | 2018-05-13 19:52:33 -0400 | |
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committer | 2018-05-13 19:52:33 -0400 | |
commit | 62be291842be67be394942ca6ec8fa835dac858e (patch) | |
tree | 8ccd05b60ddb376c73008567794fa500fbbd5783 /3rdparty/softfloat3/source/ui32_to_extF80.c | |
parent | a65fccc1f54f4aba9324e97a26f919d5fa1a244b (diff) |
Initial import of SoftFloat release 3E [R. Belmont]
This is a pre-usage import so everyone can get things in line for various compilers. GCC/Clang should be OK on most targets as-is;
MSVC may need to edit 3rdparty/softfloat3/build/MAME/build.h to conform. Please report failure/success with various compilers.
Diffstat (limited to '3rdparty/softfloat3/source/ui32_to_extF80.c')
-rw-r--r-- | 3rdparty/softfloat3/source/ui32_to_extF80.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/3rdparty/softfloat3/source/ui32_to_extF80.c b/3rdparty/softfloat3/source/ui32_to_extF80.c new file mode 100644 index 00000000000..dbb35c74797 --- /dev/null +++ b/3rdparty/softfloat3/source/ui32_to_extF80.c @@ -0,0 +1,59 @@ + +/*============================================================================ + +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 <stdint.h> +#include "platform.h" +#include "internals.h" +#include "softfloat.h" + +extFloat80_t ui32_to_extF80( uint32_t a ) +{ + uint_fast16_t uiZ64; + int_fast8_t shiftDist; + union { struct extFloat80M s; extFloat80_t f; } uZ; + + uiZ64 = 0; + if ( a ) { + shiftDist = softfloat_countLeadingZeros32( a ); + uiZ64 = 0x401E - shiftDist; + a <<= shiftDist; + } + uZ.s.signExp = uiZ64; + uZ.s.signif = (uint_fast64_t) a<<32; + return uZ.f; + +} + |