diff options
Diffstat (limited to 'lib/libutils/isoc/arch/arm/softfloat/source/f128M_to_i32_r_minMag.c')
-rw-r--r-- | lib/libutils/isoc/arch/arm/softfloat/source/f128M_to_i32_r_minMag.c | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/softfloat/source/f128M_to_i32_r_minMag.c b/lib/libutils/isoc/arch/arm/softfloat/source/f128M_to_i32_r_minMag.c new file mode 100644 index 0000000..c9e36cf --- /dev/null +++ b/lib/libutils/isoc/arch/arm/softfloat/source/f128M_to_i32_r_minMag.c @@ -0,0 +1,95 @@ + +/*============================================================================ + +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" + +#ifdef SOFTFLOAT_FAST_INT64 + +int_fast32_t f128M_to_i32_r_minMag( const float128_t *aPtr, bool exact ) +{ + + return f128_to_i32_r_minMag( *aPtr, exact ); + +} + +#else + +int_fast32_t f128M_to_i32_r_minMag( const float128_t *aPtr, bool exact ) +{ + const uint32_t *aWPtr; + uint32_t uiA96; + bool sign; + int32_t exp; + uint64_t sig64; + int32_t shiftCount; + uint32_t absZ, uiZ; + union { uint32_t ui; int32_t i; } uZ; + + aWPtr = (const uint32_t *) aPtr; + uiA96 = aWPtr[indexWordHi( 4 )]; + sign = signF128UI96( uiA96 ); + exp = expF128UI96( uiA96 ); + sig64 = (uint64_t) fracF128UI96( uiA96 )<<32 | aWPtr[indexWord( 4, 2 )]; + if ( aWPtr[indexWord( 4, 1 )] | aWPtr[indexWord( 4, 0 )] ) sig64 |= 1; + if ( exp < 0x3FFF ) { + if ( exact && (exp | sig64) ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + return 0; + } + if ( 0x401F <= exp ) goto invalid; + shiftCount = 0x402F - exp; + sig64 |= UINT64_C( 0x0001000000000000 ); + absZ = sig64>>shiftCount; + uiZ = sign ? -absZ : absZ; + if ( uiZ>>31 != sign ) goto invalid; + if ( exact && ((uint64_t) absZ<<shiftCount != sig64) ) { + softfloat_exceptionFlags |= softfloat_flag_inexact; + } + uZ.ui = uiZ; + return uZ.i; + invalid: + softfloat_raiseFlags( softfloat_flag_invalid ); + return sign ? -0x7FFFFFFF - 1 : 0x7FFFFFFF; + +} + +#endif + |