| // 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 the unsigned integer formed from concatenating `uiA64' and |
| | `uiA0' as a 128-bit floating-point value, and likewise interpreting the |
| | unsigned integer formed from concatenating `uiB64' and `uiB0' as another |
| | 128-bit floating-point value, and assuming at least on of these floating- |
| | point values is a NaN, returns the bit pattern of the combined NaN result. |
| | If either original floating-point value is a signaling NaN, the invalid |
| | exception is raised. |
| *----------------------------------------------------------------------------*/ |
| struct uint128 |
| softfloat_propagateNaNF128UI( |
| uint_fast64_t uiA64, |
| uint_fast64_t uiA0, |
| uint_fast64_t uiB64, |
| uint_fast64_t uiB0 |
| ) |
| { |
| bool isSigNaNA; |
| struct uint128 uiZ; |
| |
| isSigNaNA = softfloat_isSigNaNF128UI( uiA64, uiA0 ); |
| if ( isSigNaNA || softfloat_isSigNaNF128UI( uiB64, uiB0 ) ) { |
| softfloat_raiseFlags( softfloat_flag_invalid ); |
| if ( isSigNaNA ) goto returnNonsigA; |
| } |
| if ( isNaNF128UI( uiA64, uiA0 ) ) { |
| returnNonsigA: |
| uiZ.v64 = uiA64; |
| uiZ.v0 = uiA0; |
| } else { |
| uiZ.v64 = uiB64; |
| uiZ.v0 = uiB0; |
| } |
| uiZ.v64 |= UINT64_C( 0x0000800000000000 ); |
| return uiZ; |
| |
| } |
| |