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| 2 | /*============================================================================
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| 3 |
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| 4 | This C source file is part of the SoftFloat IEEE Floating-Point Arithmetic
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| 5 | Package, Release 3e, by John R. Hauser.
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| 6 |
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| 7 | Copyright 2011, 2012, 2013, 2014, 2015, 2016 The Regents of the University of
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| 8 | California. All rights reserved.
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| 9 |
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| 10 | Redistribution and use in source and binary forms, with or without
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| 11 | modification, are permitted provided that the following conditions are met:
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| 12 |
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| 13 | 1. Redistributions of source code must retain the above copyright notice,
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| 14 | this list of conditions, and the following disclaimer.
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| 15 |
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| 16 | 2. Redistributions in binary form must reproduce the above copyright notice,
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| 17 | this list of conditions, and the following disclaimer in the documentation
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| 18 | and/or other materials provided with the distribution.
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| 19 |
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| 20 | 3. Neither the name of the University nor the names of its contributors may
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| 21 | be used to endorse or promote products derived from this software without
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| 22 | specific prior written permission.
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| 23 |
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| 24 | THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
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| 25 | EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 26 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
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| 27 | DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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| 28 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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| 29 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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| 30 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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| 31 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 32 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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| 33 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 34 |
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| 35 | =============================================================================*/
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| 36 |
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| 37 | #include <stdint.h>
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| 38 | #include "platform.h"
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| 39 | #include "primitiveTypes.h"
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| 40 |
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| 41 | #ifndef softfloat_mul128MTo256M
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| 42 |
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| 43 | void
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| 44 | softfloat_mul128MTo256M(
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| 45 | const uint32_t *aPtr, const uint32_t *bPtr, uint32_t *zPtr )
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| 46 | {
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| 47 | uint32_t *lastZPtr, wordB;
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| 48 | uint64_t dwordProd;
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| 49 | uint32_t wordZ;
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| 50 | uint_fast8_t carry;
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| 51 |
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| 52 | bPtr += indexWordLo( 4 );
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| 53 | lastZPtr = zPtr + indexMultiwordHi( 8, 5 );
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| 54 | zPtr += indexMultiwordLo( 8, 5 );
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| 55 | wordB = *bPtr;
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| 56 | dwordProd = (uint64_t) aPtr[indexWord( 4, 0 )] * wordB;
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| 57 | zPtr[indexWord( 5, 0 )] = dwordProd;
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| 58 | dwordProd = (uint64_t) aPtr[indexWord( 4, 1 )] * wordB + (dwordProd>>32);
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| 59 | zPtr[indexWord( 5, 1 )] = dwordProd;
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| 60 | dwordProd = (uint64_t) aPtr[indexWord( 4, 2 )] * wordB + (dwordProd>>32);
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| 61 | zPtr[indexWord( 5, 2 )] = dwordProd;
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| 62 | dwordProd = (uint64_t) aPtr[indexWord( 4, 3 )] * wordB + (dwordProd>>32);
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| 63 | zPtr[indexWord( 5, 3 )] = dwordProd;
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| 64 | zPtr[indexWord( 5, 4 )] = dwordProd>>32;
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| 65 | do {
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| 66 | bPtr += wordIncr;
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| 67 | zPtr += wordIncr;
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| 68 | wordB = *bPtr;
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| 69 | dwordProd = (uint64_t) aPtr[indexWord( 4, 0 )] * wordB;
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| 70 | wordZ = zPtr[indexWord( 5, 0 )] + (uint32_t) dwordProd;
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| 71 | zPtr[indexWord( 5, 0 )] = wordZ;
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| 72 | carry = (wordZ < (uint32_t) dwordProd);
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| 73 | dwordProd =
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| 74 | (uint64_t) aPtr[indexWord( 4, 1 )] * wordB + (dwordProd>>32);
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| 75 | wordZ = zPtr[indexWord( 5, 1 )] + (uint32_t) dwordProd + carry;
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| 76 | zPtr[indexWord( 5, 1 )] = wordZ;
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| 77 | if ( wordZ != (uint32_t) dwordProd ) {
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| 78 | carry = (wordZ < (uint32_t) dwordProd);
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| 79 | }
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| 80 | dwordProd =
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| 81 | (uint64_t) aPtr[indexWord( 4, 2 )] * wordB + (dwordProd>>32);
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| 82 | wordZ = zPtr[indexWord( 5, 2 )] + (uint32_t) dwordProd + carry;
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| 83 | zPtr[indexWord( 5, 2 )] = wordZ;
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| 84 | if ( wordZ != (uint32_t) dwordProd ) {
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| 85 | carry = (wordZ < (uint32_t) dwordProd);
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| 86 | }
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| 87 | dwordProd =
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| 88 | (uint64_t) aPtr[indexWord( 4, 3 )] * wordB + (dwordProd>>32);
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| 89 | wordZ = zPtr[indexWord( 5, 3 )] + (uint32_t) dwordProd + carry;
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| 90 | zPtr[indexWord( 5, 3 )] = wordZ;
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| 91 | if ( wordZ != (uint32_t) dwordProd ) {
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| 92 | carry = (wordZ < (uint32_t) dwordProd);
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| 93 | }
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| 94 | zPtr[indexWord( 5, 4 )] = (dwordProd>>32) + carry;
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| 95 | } while ( zPtr != lastZPtr );
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| 96 |
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| 97 | }
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| 98 |
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| 99 | #endif
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| 100 |
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