diff options
Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/f128_to_i32_r_minMag.c')
-rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/f128_to_i32_r_minMag.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/f128_to_i32_r_minMag.c b/lib/libutils/isoc/arch/arm/softfloat/source/f128_to_i32_r_minMag.c new file mode 100644 index 0000000..4c12c83 --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/f128_to_i32_r_minMag.c @@ -0,0 +1,90 @@ + +/*============================================================================ + +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 "softfloat.h" + +int_fast32_t f128_to_i32_r_minMag( float128_t a, bool exact ) +{ + union ui128_f128 uA; + uint_fast64_t uiA64, uiA0; + int_fast32_t exp; + uint_fast64_t sig64; + int_fast32_t shiftCount; + bool sign; + int_fast32_t absZ; + + uA.f = a; + uiA64 = uA.ui.v64; + uiA0 = uA.ui.v0; + exp = expF128UI64( uiA64 ); + sig64 = fracF128UI64( uiA64 ) | (uiA0 != 0); + shiftCount = 0x402F - exp; + if ( 49 <= shiftCount ) { + if ( exact && (exp | sig64) ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return 0; + } + sign = signF128UI64( uiA64 ); + if ( shiftCount < 18 ) { + if ( + sign && (shiftCount == 17) + && (sig64 < UINT64_C( 0x0000000000020000 )) + ) { + if ( exact && sig64 ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + } else { + softfloat_raiseFlags( softfloat_flag_invalid ); + if ( ! sign || ((exp == 0x7FFF) && sig64) ) return 0x7FFFFFFF; + } + return -0x7FFFFFFF - 1; + } + sig64 |= UINT64_C( 0x0001000000000000 ); + absZ = sig64>>shiftCount; + if ( + exact && ((uint_fast64_t) (uint_fast32_t) absZ<<shiftCount != sig64) + ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return sign ? -absZ : absZ; + +} + |