diff options
Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i64_r_minMag.c')
-rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i64_r_minMag.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i64_r_minMag.c b/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i64_r_minMag.c new file mode 100644 index 0000000..d906659 --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/f64_to_i64_r_minMag.c @@ -0,0 +1,87 @@ + +/*============================================================================ + +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_fast64_t f64_to_i64_r_minMag( float64_t a, bool exact ) +{ + union ui64_f64 uA; + uint_fast64_t uiA; + bool sign; + int_fast16_t exp; + uint_fast64_t sig; + int_fast16_t shiftCount; + int_fast64_t absZ; + + uA.f = a; + uiA = uA.ui; + sign = signF64UI( uiA ); + exp = expF64UI( uiA ); + sig = fracF64UI( uiA ); + shiftCount = 0x433 - exp; + if ( shiftCount <= 0 ) { + if ( shiftCount < -10 ) { + if ( uiA != packToF64UI( 1, 0x43E, 0 ) ) { + softfloat_raiseFlags( softfloat_flag_invalid ); + if ( ! sign || ((exp == 0x7FF) && sig) ) { + return INT64_C( 0x7FFFFFFFFFFFFFFF ); + } + } + return -INT64_C( 0x7FFFFFFFFFFFFFFF ) - 1; + } + sig |= UINT64_C( 0x0010000000000000 ); + absZ = sig<<-shiftCount; + } else { + if ( 53 <= shiftCount ) { + if ( exact && (exp | sig) ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return 0; + } + sig |= UINT64_C( 0x0010000000000000 ); + absZ = sig>>shiftCount; + if ( exact && (absZ<<shiftCount != sig) ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + } + return sign ? -absZ : absZ; + +} + |