| |
| /*============================================================================ |
| |
| 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 f64_to_f128M( float64_t a, float128_t *zPtr ) |
| { |
| |
| *zPtr = f64_to_f128( a ); |
| |
| } |
| |
| #else |
| |
| void f64_to_f128M( float64_t a, float128_t *zPtr ) |
| { |
| uint32_t *zWPtr; |
| union ui64_f64 uA; |
| uint64_t uiA; |
| bool sign; |
| int_fast16_t exp; |
| uint64_t sig; |
| struct commonNaN commonNaN; |
| uint32_t uiZ96; |
| struct exp16_sig64 normExpSig; |
| |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| zWPtr = (uint32_t *) zPtr; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uA.f = a; |
| uiA = uA.ui; |
| sign = signF64UI( uiA ); |
| exp = expF64UI( uiA ); |
| sig = fracF64UI( uiA ); |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| zWPtr[indexWord( 4, 0 )] = 0; |
| if ( exp == 0x7FF ) { |
| if ( sig ) { |
| softfloat_f64UIToCommonNaN( uiA, &commonNaN ); |
| softfloat_commonNaNToF128M( &commonNaN, zWPtr ); |
| return; |
| } |
| uiZ96 = packToF128UI96( sign, 0x7FFF, 0 ); |
| goto uiZ; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| if ( ! exp ) { |
| if ( ! sig ) { |
| uiZ96 = packToF128UI96( sign, 0, 0 ); |
| goto uiZ; |
| } |
| normExpSig = softfloat_normSubnormalF64Sig( sig ); |
| exp = normExpSig.exp - 1; |
| sig = normExpSig.sig; |
| } |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| zWPtr[indexWord( 4, 1 )] = (uint32_t) sig<<28; |
| sig >>= 4; |
| zWPtr[indexWordHi( 4 )] = packToF128UI96( sign, exp + 0x3C00, sig>>32 ); |
| zWPtr[indexWord( 4, 2 )] = sig; |
| return; |
| /*------------------------------------------------------------------------ |
| *------------------------------------------------------------------------*/ |
| uiZ: |
| zWPtr[indexWord( 4, 3 )] = uiZ96; |
| zWPtr[indexWord( 4, 2 )] = 0; |
| zWPtr[indexWord( 4, 1 )] = 0; |
| |
| } |
| |
| #endif |
| |