| |
| /*============================================================================ |
| |
| This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
| Package, Release 3e, by John R. Hauser. |
| |
| Copyright 2011, 2012, 2013, 2014, 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" |
| |
| /*---------------------------------------------------------------------------- |
| | Assuming at least one of the two 80-bit extended floating-point values |
| | pointed to by 'aSPtr' and 'bSPtr' is a NaN, stores the combined NaN result |
| | at the location pointed to by 'zSPtr'. If either original floating-point |
| | value is a signaling NaN, the invalid exception is raised. |
| *----------------------------------------------------------------------------*/ |
| void |
| softfloat_propagateNaNExtF80M( |
| const struct extFloat80M *aSPtr, |
| const struct extFloat80M *bSPtr, |
| struct extFloat80M *zSPtr |
| ) |
| { |
| const struct extFloat80M *sPtr; |
| bool isSigNaNA; |
| uint_fast16_t uiZ64; |
| uint_fast64_t uiZ0; |
| |
| sPtr = aSPtr; |
| isSigNaNA = extF80M_isSignalingNaN( (const extFloat80_t *) aSPtr ); |
| if ( |
| isSigNaNA |
| || (bSPtr |
| && extF80M_isSignalingNaN( (const extFloat80_t *) bSPtr )) |
| ) { |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| if ( isSigNaNA ) goto copyNonsig; |
| goto copyNonsigB; |
| } |
| uiZ64 = sPtr->signExp; |
| uiZ0 = sPtr->signif; |
| if ( isNaNExtF80UI( uiZ64, uiZ0 ) ) goto returnNonsig; |
| copyNonsigB: |
| sPtr = bSPtr; |
| copyNonsig: |
| uiZ64 = sPtr->signExp; |
| uiZ0 = sPtr->signif; |
| returnNonsig: |
| zSPtr->signExp = uiZ64; |
| zSPtr->signif = uiZ0 | UINT64_C( 0xC000000000000000 ); |
| |
| } |
| |