| |
| /*============================================================================ |
| |
| This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic |
| Package, Release 3d, by John R. Hauser. |
| |
| Copyright 2011, 2012, 2013, 2014, 2015 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 <stdint.h> |
| |
| #include "platform.h" |
| #include "primitiveTypes.h" |
| |
| #ifndef softfloat_mul64To128M |
| |
| void softfloat_mul64To128M( uint64_t a, uint64_t b, uint32_t *zPtr ) |
| { |
| uint32_t a32, a0, b32, b0; |
| uint64_t z0, mid1, z64, mid; |
| |
| a32 = a>>32; |
| a0 = a; |
| b32 = b>>32; |
| b0 = b; |
| z0 = (uint64_t) a0 * b0; |
| mid1 = (uint64_t) a32 * b0; |
| mid = mid1 + (uint64_t) a0 * b32; |
| z64 = (uint64_t) a32 * b32; |
| z64 += (uint64_t) (mid < mid1)<<32 | mid>>32; |
| mid <<= 32; |
| z0 += mid; |
| zPtr[indexWord( 4, 1 )] = z0>>32; |
| zPtr[indexWord( 4, 0 )] = z0; |
| z64 += (z0 < mid); |
| zPtr[indexWord( 4, 3 )] = z64>>32; |
| zPtr[indexWord( 4, 2 )] = z64; |
| |
| } |
| |
| #endif |
| |