87 lines
3.1 KiB
C
87 lines
3.1 KiB
C
/***************************************************************************
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Copyright (c) 2014-2015, The OpenBLAS Project
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. Neither the name of the OpenBLAS project nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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/* need a new enough GCC for avx512 support */
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#if (( defined(__GNUC__) && __GNUC__ > 6 && defined(__AVX2__)) || (defined(__clang__) && __clang_major__ >= 6))
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#include <immintrin.h>
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#define HAVE_KERNEL_16 1
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static void sscal_kernel_16( BLASLONG n, FLOAT *alpha, FLOAT *x)
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{
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int i = 0;
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#ifdef __AVX512CD__
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__m512 __alpha5 = _mm512_broadcastss_ps(_mm_load_ss(alpha));
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BLASLONG nn = n & -32;
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for (; i < nn; i += 32) {
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__m512 a = _mm512_loadu_ps(&x[i + 0]);
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__m512 b = _mm512_loadu_ps(&x[i + 16]);
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a *= __alpha5;
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b *= __alpha5;
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_mm512_storeu_ps(&x[i + 0], a);
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_mm512_storeu_ps(&x[i + 16], b);
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}
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for (; i < n; i += 16) {
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_mm512_storeu_ps(&x[i + 0], __alpha5 * _mm512_loadu_ps(&x[i + 0]));
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}
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#else
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__m256 __alpha = _mm256_broadcastss_ps(_mm_load_ss(alpha));
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for (; i < n; i += 16) {
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_mm256_storeu_ps(&x[i + 0], __alpha * _mm256_loadu_ps(&x[i + 0]));
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_mm256_storeu_ps(&x[i + 8], __alpha * _mm256_loadu_ps(&x[i + 8]));
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}
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#endif
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}
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static void sscal_kernel_16_zero( BLASLONG n, FLOAT *alpha, FLOAT *x)
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{
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int i = 0;
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/* question to self: Why is this not just memset() */
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#ifdef __AVX512CD__
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__m512 zero = _mm512_setzero_ps();
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for (; i < n; i += 16) {
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_mm512_storeu_ps(&x[i], zero);
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}
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#else
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__m256 zero = _mm256_setzero_ps();
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for (; i < n; i += 16) {
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_mm256_storeu_ps(&x[i + 0], zero);
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_mm256_storeu_ps(&x[i + 8], zero);
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}
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#endif
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}
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#else
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#include "sscal_microk_haswell-2.c"
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#endif
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