| |
| /*============================================================================ |
| |
| This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
| Package, Release 3d, by John R. Hauser. |
| |
| Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 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" |
| |
| #ifdef SOFTFLOAT_FAST_INT64 |
| |
| int_fast32_t |
| f128M_to_i32( const float128_t *aPtr, uint_fast8_t roundingMode, bool exact ) |
| { |
| |
| return f128_to_i32( *aPtr, roundingMode, exact ); |
| |
| } |
| |
| #else |
| |
| int_fast32_t |
| f128M_to_i32( const float128_t *aPtr, uint_fast8_t roundingMode, bool exact ) |
| { |
| const uint32_t *aWPtr; |
| uint32_t uiA96; |
| bool sign; |
| int32_t exp; |
| uint64_t sig64; |
| int32_t shiftDist; |
| |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| 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 (i32_fromNaN != i32_fromPosOverflow) || (i32_fromNaN != i32_fromNegOverflow) |
| if ( (exp == 0x7FFF) && sig64 ) { |
| #if (i32_fromNaN == i32_fromPosOverflow) |
| sign = 0; |
| #elif (i32_fromNaN == i32_fromNegOverflow) |
| sign = 1; |
| #else |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| return i32_fromNaN; |
| #endif |
| } |
| #endif |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( exp ) sig64 |= UINT64_C( 0x0001000000000000 ); |
| shiftDist = 0x4023 - exp; |
| if ( 0 < shiftDist ) sig64 = softfloat_shiftRightJam64( sig64, shiftDist ); |
| return softfloat_roundToI32( sign, sig64, roundingMode, exact ); |
| |
| } |
| |
| #endif |
| |