Add a AVX512 enabled SAXPY/DAXPY functions

written in C intrinsics for best readability.
(the same C code works for Haswell as well)

For logistical reasons the code falls back to the existing
haswell AVX2 implementation if the GCC or LLVM compiler is not new enough

diff --git a/kernel/x86_64/daxpy.c b/kernel/x86_64/daxpy.c
index b4acdcc..cde5bda 100644 (file)
--- a/kernel/x86_64/daxpy.c
+++ b/kernel/x86_64/daxpy.c
@@ -37,8 +37,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #include "daxpy_microk_steamroller-2.c"
 #elif defined(PILEDRIVER)
 #include "daxpy_microk_piledriver-2.c"
-#elif defined(HASWELL) || defined(ZEN) || defined (SKYLAKEX)
+#elif defined(HASWELL) || defined(ZEN)
 #include "daxpy_microk_haswell-2.c"
+#elif defined (SKYLAKEX)
+#include "daxpy_microk_skylakex-2.c"
 #elif defined(SANDYBRIDGE)
 #include "daxpy_microk_sandy-2.c"
 #endif

diff --git a/kernel/x86_64/daxpy_microk_skylakex-2.c b/kernel/x86_64/daxpy_microk_skylakex-2.c
new file mode 100644 (file)
index 0000000..e785a39
--- /dev/null
+++ b/kernel/x86_64/daxpy_microk_skylakex-2.c
@@ -0,0 +1,71 @@
+/***************************************************************************
+Copyright (c) 2014, The OpenBLAS Project
+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 OpenBLAS project 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 COPYRIGHT HOLDERS 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 OPENBLAS PROJECT 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.
+*****************************************************************************/
+
+
+/* need a new enough GCC for avx512 support */
+#if (( defined(__GNUC__)  && __GNUC__   > 6 && defined(__AVX2__)) || (defined(__clang__) && __clang_major__ >= 6))
+
+#include <immintrin.h>
+
+#define HAVE_KERNEL_8 1
+
+static void daxpy_kernel_8( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha)
+{
+       BLASLONG i = 0;
+
+       __m256d __alpha;
+
+       __alpha =  _mm256_broadcastsd_pd(_mm_load_sd(alpha));
+
+#ifdef __AVX512CD__
+       BLASLONG n32;
+       __m512d __alpha5;
+       __alpha5 = _mm512_broadcastsd_pd(_mm_load_sd(alpha));
+
+       n32 = n & ~31;
+
+       for (; i < n32; i+= 32) {
+               _mm512_storeu_pd(&y[i +  0], _mm512_loadu_pd(&y[i +  0]) +  __alpha5 * _mm512_loadu_pd(&x[i +  0]));
+               _mm512_storeu_pd(&y[i +  8], _mm512_loadu_pd(&y[i +  8]) +  __alpha5 * _mm512_loadu_pd(&x[i +  8]));
+               _mm512_storeu_pd(&y[i + 16], _mm512_loadu_pd(&y[i + 16]) +  __alpha5 * _mm512_loadu_pd(&x[i + 16]));
+               _mm512_storeu_pd(&y[i + 24], _mm512_loadu_pd(&y[i + 24]) +  __alpha5 * _mm512_loadu_pd(&x[i + 24]));
+       }
+
+#endif
+
+       for (; i < n; i+= 16) {
+               _mm256_storeu_pd(&y[i +  0], _mm256_loadu_pd(&y[i +  0]) + __alpha * _mm256_loadu_pd(&x[i +  0]));
+               _mm256_storeu_pd(&y[i +  4], _mm256_loadu_pd(&y[i +  4]) + __alpha * _mm256_loadu_pd(&x[i +  4]));
+               _mm256_storeu_pd(&y[i +  8], _mm256_loadu_pd(&y[i +  8]) + __alpha * _mm256_loadu_pd(&x[i +  8]));
+               _mm256_storeu_pd(&y[i + 12], _mm256_loadu_pd(&y[i + 12]) + __alpha * _mm256_loadu_pd(&x[i + 12]));
+       }
+}
+#else
+#include "daxpy_microk_haswell-2.c"
+#endif
+
+

diff --git a/kernel/x86_64/saxpy.c b/kernel/x86_64/saxpy.c
index d89c407..e1349da 100644 (file)
--- a/kernel/x86_64/saxpy.c
+++ b/kernel/x86_64/saxpy.c
@@ -31,8 +31,10 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #if defined(NEHALEM)
 #include "saxpy_microk_nehalem-2.c"
-#elif defined(HASWELL) || defined(ZEN) || defined (SKYLAKEX)
+#elif defined(HASWELL) || defined(ZEN)
 #include "saxpy_microk_haswell-2.c"
+#elif defined (SKYLAKEX)
+#include "saxpy_microk_skylakex-2.c"
 #elif defined(SANDYBRIDGE)
 #include "saxpy_microk_sandy-2.c"
 #elif defined(PILEDRIVER) || defined(STEAMROLLER) || defined(EXCAVATOR)

diff --git a/kernel/x86_64/saxpy_microk_skylakex-2.c b/kernel/x86_64/saxpy_microk_skylakex-2.c
new file mode 100644 (file)
index 0000000..950f10b
--- /dev/null
+++ b/kernel/x86_64/saxpy_microk_skylakex-2.c
@@ -0,0 +1,69 @@
+/***************************************************************************
+Copyright (c) 2014, The OpenBLAS Project
+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 OpenBLAS project 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 COPYRIGHT HOLDERS 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 OPENBLAS PROJECT 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.
+*****************************************************************************/
+
+/* need a new enough GCC for avx512 support */
+#if (( defined(__GNUC__)  && __GNUC__   > 6 && defined(__AVX2__)) || (defined(__clang__) && __clang_major__ >= 6))
+
+#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
+