OpenBLAS/kernel/x86_64/saxpy_microk_skylakex-2.c

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/* need a new enough GCC for avx512 support */
#ifdef __NVCOMPILER
#define NVCOMPVERS ( __NVCOMPILER_MAJOR__ * 100 + __NVCOMPILER_MINOR__ )
#endif
#if (( defined(__GNUC__)  && __GNUC__   > 6 && defined(__AVX2__)) || (defined(__clang__) && __clang_major__ >= 6)) || (defined(__NVCOMPILER) && NVCOMPVERS >= 2203 )

#define HAVE_KERNEL_16 1

#include <immintrin.h>

static void saxpy_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha)
{
	BLASLONG i = 0;

	__m256 __alpha;

	__alpha =  _mm256_broadcastss_ps(_mm_load_ss(alpha));

#ifdef __AVX512CD__
	BLASLONG n64;
	__m512 __alpha5;
	__alpha5 = _mm512_broadcastss_ps(_mm_load_ss(alpha));

	n64 = n & ~63;

	for (; i < n64; i+= 64) {
		_mm512_storeu_ps(&y[i +  0], _mm512_loadu_ps(&y[i +  0]) + __alpha5 * _mm512_loadu_ps(&x[i +  0]));
		_mm512_storeu_ps(&y[i + 16], _mm512_loadu_ps(&y[i + 16]) + __alpha5 * _mm512_loadu_ps(&x[i + 16]));
		_mm512_storeu_ps(&y[i + 32], _mm512_loadu_ps(&y[i + 32]) + __alpha5 * _mm512_loadu_ps(&x[i + 32]));
		_mm512_storeu_ps(&y[i + 48], _mm512_loadu_ps(&y[i + 48]) + __alpha5 * _mm512_loadu_ps(&x[i + 48]));
	}

#endif

	for (; i < n; i+= 32) {
		_mm256_storeu_ps(&y[i +  0], _mm256_loadu_ps(&y[i +  0]) + __alpha * _mm256_loadu_ps(&x[i +  0]));
		_mm256_storeu_ps(&y[i +  8], _mm256_loadu_ps(&y[i +  8]) + __alpha * _mm256_loadu_ps(&x[i +  8]));
		_mm256_storeu_ps(&y[i + 16], _mm256_loadu_ps(&y[i + 16]) + __alpha * _mm256_loadu_ps(&x[i + 16]));
		_mm256_storeu_ps(&y[i + 24], _mm256_loadu_ps(&y[i + 24]) + __alpha * _mm256_loadu_ps(&x[i + 24]));
	}
}
#else
#include "saxpy_microk_haswell-2.c"
#endif