| // SPDX-License-Identifier: BSD-3-Clause |
| |
| /*============================================================================ |
| |
| 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 "specialize.h" |
| #include "softfloat.h" |
| |
| /*---------------------------------------------------------------------------- |
| | Interpreting `uiA' and `uiB' as the bit patterns of two 32-bit floating- |
| | point values, at least one of which is a NaN, returns the bit pattern of |
| | the combined NaN result. If either `uiA' or `uiB' has the pattern of a |
| | signaling NaN, the invalid exception is raised. |
| *----------------------------------------------------------------------------*/ |
| uint_fast32_t |
| softfloat_propagateNaNF32UI( uint_fast32_t uiA, uint_fast32_t uiB ) |
| { |
| bool isSigNaNA; |
| |
| isSigNaNA = softfloat_isSigNaNF32UI( uiA ); |
| if ( isSigNaNA || softfloat_isSigNaNF32UI( uiB ) ) { |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| if ( isSigNaNA ) return uiA | 0x00400000; |
| } |
| return (isNaNF32UI( uiA ) ? uiA : uiB) | 0x00400000; |
| |
| } |
| |