From e45c960c2c7f151f76b6a01478ebb7574337fdce Mon Sep 17 00:00:00 2001 From: wernsaar Date: Sat, 23 Aug 2014 17:15:21 +0200 Subject: [PATCH] added optimized saxpy kernel for nehalem --- kernel/x86_64/KERNEL.NEHALEM | 2 + kernel/x86_64/saxpy.c | 103 +++++++++++++++++++++++++ kernel/x86_64/saxpy_microk_nehalem-2.c | 91 ++++++++++++++++++++++ 3 files changed, 196 insertions(+) create mode 100644 kernel/x86_64/saxpy.c create mode 100644 kernel/x86_64/saxpy_microk_nehalem-2.c diff --git a/kernel/x86_64/KERNEL.NEHALEM b/kernel/x86_64/KERNEL.NEHALEM index 5523b4571..3cbaa471f 100644 --- a/kernel/x86_64/KERNEL.NEHALEM +++ b/kernel/x86_64/KERNEL.NEHALEM @@ -1,3 +1,5 @@ +SAXPYKERNEL = saxpy.c + SDOTKERNEL = sdot.c DDOTKERNEL = ddot.c diff --git a/kernel/x86_64/saxpy.c b/kernel/x86_64/saxpy.c new file mode 100644 index 000000000..e6c016ee3 --- /dev/null +++ b/kernel/x86_64/saxpy.c @@ -0,0 +1,103 @@ +/*************************************************************************** +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. +*****************************************************************************/ + + +#include "common.h" + + +#if defined(NEHALEM) +#include "saxpy_microk_nehalem-2.c" +#endif + + +#ifndef HAVE_KERNEL_16 + +void saxpy_kernel_16(BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha) +{ + BLASLONG register i = 0; + FLOAT a = *alpha; + + while(i < n) + { + y[i] += a * x[i]; + y[i+1] += a * x[i+1]; + y[i+2] += a * x[i+2]; + y[i+3] += a * x[i+3]; + y[i+4] += a * x[i+4]; + y[i+5] += a * x[i+5]; + y[i+6] += a * x[i+6]; + y[i+7] += a * x[i+7]; + i+=8 ; + + } + +} + +#endif + +int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2) +{ + BLASLONG i=0; + BLASLONG ix=0,iy=0; + + if ( n <= 0 ) return(0); + + if ( (inc_x == 1) && (inc_y == 1) ) + { + + int n1 = n & -16; + + if ( n1 ) + saxpy_kernel_16(n1, x, y , &da ); + + i = n1; + while(i < n) + { + + y[i] += da * x[i] ; + i++ ; + + } + return(0); + + + } + + while(i < n) + { + + y[iy] += da * x[ix] ; + ix += inc_x ; + iy += inc_y ; + i++ ; + + } + return(0); + +} + + diff --git a/kernel/x86_64/saxpy_microk_nehalem-2.c b/kernel/x86_64/saxpy_microk_nehalem-2.c new file mode 100644 index 000000000..14ff51a0d --- /dev/null +++ b/kernel/x86_64/saxpy_microk_nehalem-2.c @@ -0,0 +1,91 @@ +/*************************************************************************** +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. +*****************************************************************************/ + +#define HAVE_KERNEL_16 1 +static void saxpy_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y , FLOAT *alpha) __attribute__ ((noinline)); + +static void saxpy_kernel_16( BLASLONG n, FLOAT *x, FLOAT *y, FLOAT *alpha) +{ + + + BLASLONG register i = 0; + + __asm__ __volatile__ + ( + "movss (%4), %%xmm0 \n\t" // alpha + "shufps $0, %%xmm0, %%xmm0 \n\t" + + ".align 16 \n\t" + ".L01LOOP%=: \n\t" + // "prefetcht0 192(%2,%0,4) \n\t" + // "prefetcht0 192(%3,%0,4) \n\t" + + "movups (%2,%0,4), %%xmm12 \n\t" // 4 * x + "movups 16(%2,%0,4), %%xmm13 \n\t" // 4 * x + "movups 32(%2,%0,4), %%xmm14 \n\t" // 4 * x + "movups 48(%2,%0,4), %%xmm15 \n\t" // 4 * x + "movups (%3,%0,4), %%xmm8 \n\t" // 4 * y + "movups 16(%3,%0,4), %%xmm9 \n\t" // 4 * y + "movups 32(%3,%0,4), %%xmm10 \n\t" // 4 * y + "movups 48(%3,%0,4), %%xmm11 \n\t" // 4 * y + + "mulps %%xmm0 , %%xmm12 \n\t" // alpha * x + "mulps %%xmm0 , %%xmm13 \n\t" + "mulps %%xmm0 , %%xmm14 \n\t" + "mulps %%xmm0 , %%xmm15 \n\t" + + "addps %%xmm12, %%xmm8 \n\t" // y += alpha *x + "addps %%xmm13, %%xmm9 \n\t" + "addps %%xmm14, %%xmm10 \n\t" + "addps %%xmm15, %%xmm11 \n\t" + + "movups %%xmm8 , (%3,%0,4) \n\t" + "movups %%xmm9 , 16(%3,%0,4) \n\t" + "movups %%xmm10, 32(%3,%0,4) \n\t" + "movups %%xmm11, 48(%3,%0,4) \n\t" + + "addq $16, %0 \n\t" + "subq $16, %1 \n\t" + "jnz .L01LOOP%= \n\t" + + : + : + "r" (i), // 0 + "r" (n), // 1 + "r" (x), // 2 + "r" (y), // 3 + "r" (alpha) // 4 + : "cc", + "%xmm0", + "%xmm8", "%xmm9", "%xmm10", "%xmm11", + "%xmm12", "%xmm13", "%xmm14", "%xmm15", + "memory" + ); + +} + +