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Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/extF80_to_f128.c')
| -rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/extF80_to_f128.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/extF80_to_f128.c b/lib/libutils/isoc/arch/arm/softfloat/source/extF80_to_f128.c new file mode 100644 index 0000000..68ddb25 --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/extF80_to_f128.c @@ -0,0 +1,75 @@ + +/*============================================================================ + +This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic +Package, Release 3a, 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" + +float128_t extF80_to_f128( extFloat80_t a ) +{ + union { struct extFloat80M s; extFloat80_t f; } uA; + uint_fast16_t uiA64; + uint_fast64_t uiA0; + uint_fast16_t exp; + uint_fast64_t sig; + struct commonNaN commonNaN; + struct uint128 uiZ; + bool sign; + struct uint128 sig128; + union ui128_f128 uZ; + + uA.f = a; + uiA64 = uA.s.signExp; + uiA0 = uA.s.signif; + exp = expExtF80UI64( uiA64 ); + sig = uiA0 & UINT64_C( 0x7FFFFFFFFFFFFFFF ); + if ( (exp == 0x7FFF) && sig ) { + softfloat_extF80UIToCommonNaN( uiA64, uiA0, &commonNaN ); + uiZ = softfloat_commonNaNToF128UI( &commonNaN ); + } else { + sign = signExtF80UI64( uiA64 ); + sig128 = softfloat_shortShiftLeft128( 0, sig, 49 ); + uiZ.v64 = packToF128UI64( sign, exp, sig128.v64 ); + uiZ.v0 = sig128.v0; + } + uZ.ui = uiZ; + return uZ.f; + +} + |