| |
| /*============================================================================ |
| |
| This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
| Package, Release 3, by John R. Hauser. |
| |
| Copyright 2011, 2012, 2013, 2014 The Regents of the University of California |
| (Regents). All Rights Reserved. Redistribution and use in source and binary |
| forms, with or without modification, are permitted provided that the following |
| conditions are met: |
| |
| Redistributions of source code must retain the above copyright notice, |
| this list of conditions, and the following two paragraphs of disclaimer. |
| Redistributions in binary form must reproduce the above copyright notice, |
| this list of conditions, and the following two paragraphs of disclaimer in the |
| documentation and/or other materials provided with the distribution. Neither |
| the name of the Regents nor the names of its contributors may be used to |
| endorse or promote products derived from this software without specific prior |
| written permission. |
| |
| IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
| SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING |
| OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF REGENTS HAS |
| BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED |
| TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| PURPOSE. THE SOFTWARE AND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED |
| HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE |
| MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
| |
| =============================================================================*/ |
| |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include "platform.h" |
| #include "internals.h" |
| #include "specialize.h" |
| #include "softfloat.h" |
| |
| #ifdef SOFTFLOAT_FAST_INT64 |
| |
| void extF80M_to_f128M( const extFloat80_t *aPtr, float128_t *zPtr ) |
| { |
| |
| *zPtr = extF80_to_f128( *aPtr ); |
| |
| } |
| |
| #else |
| |
| void extF80M_to_f128M( const extFloat80_t *aPtr, float128_t *zPtr ) |
| { |
| const struct extFloat80M *aSPtr; |
| uint32_t *zWPtr; |
| uint_fast16_t uiA64; |
| bool sign; |
| int32_t exp; |
| uint64_t sig; |
| struct commonNaN commonNaN; |
| uint32_t uiZ96; |
| |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| aSPtr = (const struct extFloat80M *) aPtr; |
| zWPtr = (uint32_t *) zPtr; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uiA64 = aSPtr->signExp; |
| sign = signExtF80UI64( uiA64 ); |
| exp = expExtF80UI64( uiA64 ); |
| sig = aSPtr->signif; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| zWPtr[indexWord( 4, 0 )] = 0; |
| if ( exp == 0x7FFF ) { |
| if ( sig & UINT64_C( 0x7FFFFFFFFFFFFFFF ) ) { |
| softfloat_extF80MToCommonNaN( aSPtr, &commonNaN ); |
| softfloat_commonNaNToF128M( &commonNaN, zWPtr ); |
| return; |
| } |
| uiZ96 = packToF128UI96( sign, 0x7FFF, 0 ); |
| goto uiZ; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( exp ) --exp; |
| if ( ! (sig & UINT64_C( 0x8000000000000000 )) ) { |
| if ( ! sig ) { |
| uiZ96 = packToF128UI96( sign, 0, 0 ); |
| goto uiZ; |
| } |
| exp += softfloat_normExtF80SigM( &sig ); |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| zWPtr[indexWord( 4, 1 )] = (uint32_t) sig<<17; |
| sig >>= 15; |
| zWPtr[indexWord( 4, 2 )] = sig; |
| if ( exp < 0 ) { |
| zWPtr[indexWordHi( 4 )] = sig>>32; |
| softfloat_shiftRight96M( |
| &zWPtr[indexMultiwordHi( 4, 3 )], |
| -exp, |
| &zWPtr[indexMultiwordHi( 4, 3 )] |
| ); |
| exp = 0; |
| sig = (uint64_t) zWPtr[indexWordHi( 4 )]<<32; |
| } |
| zWPtr[indexWordHi( 4 )] = packToF128UI96( sign, exp, sig>>32 ); |
| return; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uiZ: |
| zWPtr[indexWord( 4, 3 )] = uiZ96; |
| zWPtr[indexWord( 4, 2 )] = 0; |
| zWPtr[indexWord( 4, 1 )] = 0; |
| |
| } |
| |
| #endif |
| |