From cce574c3e0763af7a5017f20fa36959c896fc4fa Mon Sep 17 00:00:00 2001 From: Martin Kroeker Date: Thu, 31 Jan 2019 21:24:55 +0100 Subject: [PATCH] Improve the z14 SGEMVT kernel from patch provided by aarnez in #991 --- sgemv_t_4.c | 811 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 811 insertions(+) create mode 100644 sgemv_t_4.c diff --git a/sgemv_t_4.c b/sgemv_t_4.c new file mode 100644 index 000000000..a3136723a --- /dev/null +++ b/sgemv_t_4.c @@ -0,0 +1,811 @@ +/*************************************************************************** +Copyright (c) 2017, 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" + +#define NBMAX 2048 + +static void sgemv_kernel_4x4(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y) +{ + __asm__ volatile ( + "vzero %%v0 \n\t" + "vzero %%v1 \n\t" + "vzero %%v2 \n\t" + "vzero %%v3 \n\t" + "xgr %%r1,%%r1 \n\t" + + "lghi %%r0,-32 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 1f \n\t" + + "srlg %%r0,%%r0,5 \n\t" + "0: \n\t" + "pfd 1,1024(%%r1,%1) \n\t" + "pfd 1,1024(%%r1,%2) \n\t" + "pfd 1,1024(%%r1,%3) \n\t" + "pfd 1,1024(%%r1,%4) \n\t" + "pfd 1,1024(%%r1,%5) \n\t" + + "vl %%v16,0(%%r1,%5) \n\t" + "vl %%v17,16(%%r1,%5) \n\t" + "vl %%v18,32(%%r1,%5) \n\t" + "vl %%v19,48(%%r1,%5) \n\t" + "vl %%v20,64(%%r1,%5) \n\t" + "vl %%v21,80(%%r1,%5) \n\t" + "vl %%v22,96(%%r1,%5) \n\t" + "vl %%v23,112(%%r1,%5) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + "vl %%v25,0(%%r1,%2) \n\t" + "vfmasb %%v1,%%v16,%%v25,%%v1 \n\t" + "vl %%v26,0(%%r1,%3) \n\t" + "vfmasb %%v2,%%v16,%%v26,%%v2 \n\t" + "vl %%v27,0(%%r1,%4) \n\t" + "vfmasb %%v3,%%v16,%%v27,%%v3 \n\t" + + "vl %%v28,16(%%r1,%1) \n\t" + "vfmasb %%v0,%%v17,%%v28,%%v0 \n\t" + "vl %%v29,16(%%r1,%2) \n\t" + "vfmasb %%v1,%%v17,%%v29,%%v1 \n\t" + "vl %%v30,16(%%r1,%3) \n\t" + "vfmasb %%v2,%%v17,%%v30,%%v2 \n\t" + "vl %%v31,16(%%r1,%4) \n\t" + "vfmasb %%v3,%%v17,%%v31,%%v3 \n\t" + + "vl %%v24,32(%%r1,%1) \n\t" + "vfmasb %%v0,%%v18,%%v24,%%v0 \n\t" + "vl %%v25,32(%%r1,%2) \n\t" + "vfmasb %%v1,%%v18,%%v25,%%v1 \n\t" + "vl %%v26,32(%%r1,%3) \n\t" + "vfmasb %%v2,%%v18,%%v26,%%v2 \n\t" + "vl %%v27,32(%%r1,%4) \n\t" + "vfmasb %%v3,%%v18,%%v27,%%v3 \n\t" + + "vl %%v28,48(%%r1,%1) \n\t" + "vfmasb %%v0,%%v19,%%v28,%%v0 \n\t" + "vl %%v29,48(%%r1,%2) \n\t" + "vfmasb %%v1,%%v19,%%v29,%%v1 \n\t" + "vl %%v30,48(%%r1,%3) \n\t" + "vfmasb %%v2,%%v19,%%v30,%%v2 \n\t" + "vl %%v31,48(%%r1,%4) \n\t" + "vfmasb %%v3,%%v19,%%v31,%%v3 \n\t" + + "vl %%v24,64(%%r1,%1) \n\t" + "vfmasb %%v0,%%v20,%%v24,%%v0 \n\t" + "vl %%v25,64(%%r1,%2) \n\t" + "vfmasb %%v1,%%v20,%%v25,%%v1 \n\t" + "vl %%v26,64(%%r1,%3) \n\t" + "vfmasb %%v2,%%v20,%%v26,%%v2 \n\t" + "vl %%v27,64(%%r1,%4) \n\t" + "vfmasb %%v3,%%v20,%%v27,%%v3 \n\t" + + "vl %%v28,80(%%r1,%1) \n\t" + "vfmasb %%v0,%%v21,%%v28,%%v0 \n\t" + "vl %%v29,80(%%r1,%2) \n\t" + "vfmasb %%v1,%%v21,%%v29,%%v1 \n\t" + "vl %%v30,80(%%r1,%3) \n\t" + "vfmasb %%v2,%%v21,%%v30,%%v2 \n\t" + "vl %%v31,80(%%r1,%4) \n\t" + "vfmasb %%v3,%%v21,%%v31,%%v3 \n\t" + + "vl %%v24,96(%%r1,%1) \n\t" + "vfmasb %%v0,%%v22,%%v24,%%v0 \n\t" + "vl %%v25,96(%%r1,%2) \n\t" + "vfmasb %%v1,%%v22,%%v25,%%v1 \n\t" + "vl %%v26,96(%%r1,%3) \n\t" + "vfmasb %%v2,%%v22,%%v26,%%v2 \n\t" + "vl %%v27,96(%%r1,%4) \n\t" + "vfmasb %%v3,%%v22,%%v27,%%v3 \n\t" + + "vl %%v28,112(%%r1,%1) \n\t" + "vfmasb %%v0,%%v23,%%v28,%%v0 \n\t" + "vl %%v29,112(%%r1,%2) \n\t" + "vfmasb %%v1,%%v23,%%v29,%%v1 \n\t" + "vl %%v30,112(%%r1,%3) \n\t" + "vfmasb %%v2,%%v23,%%v30,%%v2 \n\t" + "vl %%v31,112(%%r1,%4) \n\t" + "vfmasb %%v3,%%v23,%%v31,%%v3 \n\t" + + "agfi %%r1,128 \n\t" + "brctg %%r0,0b \n\t" + + "1: \n\t" + "lghi %%r0,28 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 3f \n\t" + + "srlg %%r0,%%r0,2 \n\t" + "2: \n\t" + "vl %%v16,0(%%r1,%5) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + "vl %%v25,0(%%r1,%2) \n\t" + "vfmasb %%v1,%%v16,%%v25,%%v1 \n\t" + "vl %%v26,0(%%r1,%3) \n\t" + "vfmasb %%v2,%%v16,%%v26,%%v2 \n\t" + "vl %%v27,0(%%r1,%4) \n\t" + "vfmasb %%v3,%%v16,%%v27,%%v3 \n\t" + + "agfi %%r1,16 \n\t" + "brctg %%r0,2b \n\t" + + "3: \n\t" + "veslg %%v4,%%v0,32 \n\t" + "vfasb %%v0,%%v0,%%v4 \n\t" + "vrepg %%v4,%%v0,1 \n\t" + "aebr %%f0,%%f4 \n\t" + "ste %%f0,0(%6) \n\t" + "veslg %%v4,%%v1,32 \n\t" + "vfasb %%v1,%%v1,%%v4 \n\t" + "vrepg %%v4,%%v1,1 \n\t" + "aebr %%f1,%%f4 \n\t" + "ste %%f1,4(%6) \n\t" + "veslg %%v4,%%v2,32 \n\t" + "vfasb %%v2,%%v2,%%v4 \n\t" + "vrepg %%v4,%%v2,1 \n\t" + "aebr %%f2,%%f4 \n\t" + "ste %%f2,8(%6) \n\t" + "veslg %%v4,%%v3,32 \n\t" + "vfasb %%v3,%%v3,%%v4 \n\t" + "vrepg %%v4,%%v3,1 \n\t" + "aebr %%f3,%%f4 \n\t" + "ste %%f3,12(%6) " + : + :"r"(n),"ZR"((const FLOAT (*)[n])ap[0]),"ZR"((const FLOAT (*)[n])ap[1]),"ZR"((const FLOAT (*)[n])ap[2]),"ZR"((const FLOAT (*)[n])ap[3]),"ZR"((const FLOAT (*)[n])x),"ZQ"((FLOAT (*)[4])y) + :"memory","cc","r0","r1","v0","v1","v2","v3","v4","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31" + ); +} + +static void sgemv_kernel_4x2(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y) +{ + __asm__ volatile ( + "vzero %%v0 \n\t" + "vzero %%v1 \n\t" + "xgr %%r1,%%r1 \n\t" + + "lghi %%r0,-32 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 1f \n\t" + + "srlg %%r0,%%r0,5 \n\t" + "0: \n\t" + "pfd 1,1024(%%r1,%1) \n\t" + "pfd 1,1024(%%r1,%2) \n\t" + "pfd 1,1024(%%r1,%3) \n\t" + + "vl %%v16,0(%%r1,%3) \n\t" + "vl %%v17,16(%%r1,%3) \n\t" + "vl %%v18,32(%%r1,%3) \n\t" + "vl %%v19,48(%%r1,%3) \n\t" + "vl %%v20,64(%%r1,%3) \n\t" + "vl %%v21,80(%%r1,%3) \n\t" + "vl %%v22,96(%%r1,%3) \n\t" + "vl %%v23,112(%%r1,%3) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + "vl %%v25,0(%%r1,%2) \n\t" + "vfmasb %%v1,%%v16,%%v25,%%v1 \n\t" + + "vl %%v26,16(%%r1,%1) \n\t" + "vfmasb %%v0,%%v17,%%v26,%%v0 \n\t" + "vl %%v27,16(%%r1,%2) \n\t" + "vfmasb %%v1,%%v17,%%v27,%%v1 \n\t" + + "vl %%v28,32(%%r1,%1) \n\t" + "vfmasb %%v0,%%v18,%%v28,%%v0 \n\t" + "vl %%v29,32(%%r1,%2) \n\t" + "vfmasb %%v1,%%v18,%%v29,%%v1 \n\t" + + "vl %%v30,48(%%r1,%1) \n\t" + "vfmasb %%v0,%%v19,%%v30,%%v0 \n\t" + "vl %%v31,48(%%r1,%2) \n\t" + "vfmasb %%v1,%%v19,%%v31,%%v1 \n\t" + + "vl %%v24,64(%%r1,%1) \n\t" + "vfmasb %%v0,%%v20,%%v24,%%v0 \n\t" + "vl %%v25,64(%%r1,%2) \n\t" + "vfmasb %%v1,%%v20,%%v25,%%v1 \n\t" + + "vl %%v26,80(%%r1,%1) \n\t" + "vfmasb %%v0,%%v21,%%v26,%%v0 \n\t" + "vl %%v27,80(%%r1,%2) \n\t" + "vfmasb %%v1,%%v21,%%v27,%%v1 \n\t" + + "vl %%v28,96(%%r1,%1) \n\t" + "vfmasb %%v0,%%v22,%%v28,%%v0 \n\t" + "vl %%v29,96(%%r1,%2) \n\t" + "vfmasb %%v1,%%v22,%%v29,%%v1 \n\t" + + "vl %%v30,112(%%r1,%1) \n\t" + "vfmasb %%v0,%%v23,%%v30,%%v0 \n\t" + "vl %%v31,112(%%r1,%2) \n\t" + "vfmasb %%v1,%%v23,%%v31,%%v1 \n\t" + + "agfi %%r1,128 \n\t" + "brctg %%r0,0b \n\t" + + "1: \n\t" + "lghi %%r0,28 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 3f \n\t" + + "srlg %%r0,%%r0,2 \n\t" + "2: \n\t" + "vl %%v16,0(%%r1,%3) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + "vl %%v25,0(%%r1,%2) \n\t" + "vfmasb %%v1,%%v16,%%v25,%%v1 \n\t" + + "agfi %%r1,16 \n\t" + "brctg %%r0,2b \n\t" + + "3: \n\t" + "veslg %%v2,%%v0,32 \n\t" + "vfasb %%v0,%%v0,%%v2 \n\t" + "vrepg %%v2,%%v0,1 \n\t" + "aebr %%f0,%%f2 \n\t" + "ste %%f0,0(%4) \n\t" + "veslg %%v2,%%v1,32 \n\t" + "vfasb %%v1,%%v1,%%v2 \n\t" + "vrepg %%v2,%%v1,1 \n\t" + "aebr %%f1,%%f2 \n\t" + "ste %%f1,4(%4) " + : + :"r"(n),"ZR"((const FLOAT (*)[n])ap[0]),"ZR"((const FLOAT (*)[n])ap[1]),"ZR"((const FLOAT (*)[n])x),"ZQ"((FLOAT (*)[2])y) + :"memory","cc","r0","r1","v0","v1","v2","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31" + ); +} + +static void sgemv_kernel_4x1(BLASLONG n, FLOAT *a0, FLOAT *x, FLOAT *y) +{ + __asm__ volatile ( + "vzero %%v0 \n\t" + "xgr %%r1,%%r1 \n\t" + + "lghi %%r0,-32 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 1f \n\t" + + "srlg %%r0,%%r0,5 \n\t" + "0: \n\t" + "pfd 1,1024(%%r1,%1) \n\t" + "pfd 1,1024(%%r1,%2) \n\t" + + "vl %%v16,0(%%r1,%2) \n\t" + "vl %%v17,16(%%r1,%2) \n\t" + "vl %%v18,32(%%r1,%2) \n\t" + "vl %%v19,48(%%r1,%2) \n\t" + "vl %%v20,64(%%r1,%2) \n\t" + "vl %%v21,80(%%r1,%2) \n\t" + "vl %%v22,96(%%r1,%2) \n\t" + "vl %%v23,112(%%r1,%2) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + + "vl %%v25,16(%%r1,%1) \n\t" + "vfmasb %%v0,%%v17,%%v25,%%v0 \n\t" + + "vl %%v26,32(%%r1,%1) \n\t" + "vfmasb %%v0,%%v18,%%v26,%%v0 \n\t" + + "vl %%v27,48(%%r1,%1) \n\t" + "vfmasb %%v0,%%v19,%%v27,%%v0 \n\t" + + "vl %%v28,64(%%r1,%1) \n\t" + "vfmasb %%v0,%%v20,%%v28,%%v0 \n\t" + + "vl %%v29,80(%%r1,%1) \n\t" + "vfmasb %%v0,%%v21,%%v29,%%v0 \n\t" + + "vl %%v30,96(%%r1,%1) \n\t" + "vfmasb %%v0,%%v22,%%v30,%%v0 \n\t" + + "vl %%v31,112(%%r1,%1) \n\t" + "vfmasb %%v0,%%v23,%%v31,%%v0 \n\t" + + "agfi %%r1,128 \n\t" + "brctg %%r0,0b \n\t" + + "1: \n\t" + "lghi %%r0,28 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 3f \n\t" + + "srlg %%r0,%%r0,2 \n\t" + "2: \n\t" + "vl %%v16,0(%%r1,%2) \n\t" + + "vl %%v24,0(%%r1,%1) \n\t" + "vfmasb %%v0,%%v16,%%v24,%%v0 \n\t" + + "agfi %%r1,16 \n\t" + "brctg %%r0,2b \n\t" + + "3: \n\t" + "veslg %%v1,%%v0,32 \n\t" + "vfasb %%v0,%%v0,%%v1 \n\t" + "vrepg %%v1,%%v0,1 \n\t" + "aebr %%f0,%%f1 \n\t" + "ste %%f0,0(%3) " + : + :"r"(n),"ZR"((const FLOAT (*)[n])a0),"ZR"((const FLOAT (*)[n])x),"ZQ"((FLOAT (*)[1])y) + :"memory","cc","r0","r1","v0","v1","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31" + ); +} + +static void copy_x(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_src) +{ + BLASLONG i; + for (i = 0; i < n; i++) + { + dest[i] = *src; + src += inc_src; + } +} + +static void add_y_kernel_4(BLASLONG n, FLOAT da, FLOAT *src, FLOAT *dest) +{ + __asm__ volatile ( + "vlrepf %%v0,%1 \n\t" + "xgr %%r1,%%r1 \n\t" + + "lghi %%r0,-32 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 1f \n\t" + + "srlg %%r0,%%r0,5 \n\t" + "0: \n\t" + "pfd 1,1024(%%r1,%2) \n\t" + "pfd 2,1024(%%r1,%3) \n\t" + + "vl %%v16,0(%%r1,%2) \n\t" + "vl %%v17,16(%%r1,%2) \n\t" + "vl %%v18,32(%%r1,%2) \n\t" + "vl %%v19,48(%%r1,%2) \n\t" + "vl %%v20,64(%%r1,%2) \n\t" + "vl %%v21,80(%%r1,%2) \n\t" + "vl %%v22,96(%%r1,%2) \n\t" + "vl %%v23,112(%%r1,%2) \n\t" + + "vl %%v24, 0(%%r1,%3) \n\t" + "vfmasb %%v24,%%v16,%%v0,%%v24 \n\t" + "vst %%v24, 0(%%r1,%3) \n\t" + "vl %%v25, 16(%%r1,%3) \n\t" + "vfmasb %%v25,%%v17,%%v0,%%v25 \n\t" + "vst %%v25, 16(%%r1,%3) \n\t" + "vl %%v26, 32(%%r1,%3) \n\t" + "vfmasb %%v26,%%v18,%%v0,%%v26 \n\t" + "vst %%v26, 32(%%r1,%3) \n\t" + "vl %%v27, 48(%%r1,%3) \n\t" + "vfmasb %%v27,%%v19,%%v0,%%v27 \n\t" + "vst %%v27, 48(%%r1,%3) \n\t" + "vl %%v28, 64(%%r1,%3) \n\t" + "vfmasb %%v28,%%v20,%%v0,%%v28 \n\t" + "vst %%v28, 64(%%r1,%3) \n\t" + "vl %%v29, 80(%%r1,%3) \n\t" + "vfmasb %%v29,%%v21,%%v0,%%v29 \n\t" + "vst %%v29, 80(%%r1,%3) \n\t" + "vl %%v30, 96(%%r1,%3) \n\t" + "vfmasb %%v30,%%v22,%%v0,%%v30 \n\t" + "vst %%v30, 96(%%r1,%3) \n\t" + "vl %%v31, 112(%%r1,%3) \n\t" + "vfmasb %%v31,%%v23,%%v0,%%v31 \n\t" + "vst %%v31, 112(%%r1,%3) \n\t" + + "agfi %%r1,128 \n\t" + "brctg %%r0,0b \n\t" + + "1: \n\t" + "lghi %%r0,28 \n\t" + "ngr %%r0,%0 \n\t" + "ltgr %%r0,%%r0 \n\t" + "jz 3f \n\t" + + "srlg %%r0,%%r0,2 \n\t" + "2: \n\t" + "vl %%v16,0(%%r1,%2) \n\t" + + "vl %%v24, 0(%%r1,%3) \n\t" + "vfmasb %%v24,%%v16,%%v0,%%v24 \n\t" + "vst %%v24, 0(%%r1,%3) \n\t" + + "agfi %%r1,16 \n\t" + "brctg %%r0,2b \n\t" + + "3: \n\t" + "nop " + : + :"r"(n),"m"(da),"ZR"((const FLOAT (*)[n])src),"ZR"((FLOAT (*)[n])dest) + :"memory","cc","r0","r1","v0","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31" + ); +} +static void add_y(BLASLONG n, FLOAT da, FLOAT *src, FLOAT *dest, BLASLONG inc_dest) +{ + if (inc_dest == 1) + add_y_kernel_4(n, da, src, dest); + else + { + BLASLONG i; + for (i = 0; i < n; i++) + { + *dest += src[i] * da; + dest += inc_dest; + } + } +} + +int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer) +{ + BLASLONG register i; + BLASLONG register j; + FLOAT *a_ptr; + FLOAT *x_ptr; + FLOAT *y_ptr; + BLASLONG n0; + BLASLONG n1; + BLASLONG m1; + BLASLONG m2; + BLASLONG m3; + BLASLONG n2; + FLOAT ybuffer[2] __attribute__ ((aligned(16))); + FLOAT *xbuffer; + FLOAT *ytemp; + + if ( m < 1 ) return(0); + if ( n < 1 ) return(0); + + xbuffer = buffer; + ytemp = buffer + (m < NBMAX ? m : NBMAX); + + n0 = n / NBMAX; + n1 = (n % NBMAX) >> 2 ; + n2 = n & 3 ; + + m3 = m & 3 ; + m1 = m & -4 ; + m2 = (m & (NBMAX-1)) - m3 ; + + + BLASLONG NB = NBMAX; + + while ( NB == NBMAX ) + { + m1 -= NB; + if ( m1 < 0) + { + if ( m2 == 0 ) break; + NB = m2; + } + + y_ptr = y; + a_ptr = a; + x_ptr = x; + + if ( inc_x == 1 ) + xbuffer = x_ptr; + else + copy_x(NB,x_ptr,xbuffer,inc_x); + + + FLOAT *ap[4]; + FLOAT *yp; + BLASLONG register lda4 = 4 * lda; + ap[0] = a_ptr; + ap[1] = a_ptr + lda; + ap[2] = ap[1] + lda; + ap[3] = ap[2] + lda; + + if ( n0 > 0 ) + { + BLASLONG nb1 = NBMAX / 4; + for( j=0; j 0 ) + { + add_y(n1*4, alpha, ytemp, y_ptr, inc_y ); + y_ptr += n1 * inc_y * 4; + a_ptr += n1 * lda4 ; + } + + if ( n2 & 2 ) + { + + sgemv_kernel_4x2(NB,ap,xbuffer,ybuffer); + a_ptr += lda * 2; + *y_ptr += ybuffer[0] * alpha; + y_ptr += inc_y; + *y_ptr += ybuffer[1] * alpha; + y_ptr += inc_y; + + } + + if ( n2 & 1 ) + { + + sgemv_kernel_4x1(NB,a_ptr,xbuffer,ybuffer); + // a_ptr += lda; + *y_ptr += ybuffer[0] * alpha; + // y_ptr += inc_y; + + } + a += NB; + x += NB * inc_x; + } + + if ( m3 == 0 ) return(0); + + x_ptr = x; + a_ptr = a; + if ( m3 == 3 ) + { + FLOAT xtemp0 = *x_ptr * alpha; + x_ptr += inc_x; + FLOAT xtemp1 = *x_ptr * alpha; + x_ptr += inc_x; + FLOAT xtemp2 = *x_ptr * alpha; + + FLOAT *aj = a_ptr; + y_ptr = y; + + if ( lda == 3 && inc_y == 1 ) + { + + for ( j=0; j< ( n & -4) ; j+=4 ) + { + + y_ptr[j] += aj[0] * xtemp0 + aj[1] * xtemp1 + aj[2] * xtemp2; + y_ptr[j+1] += aj[3] * xtemp0 + aj[4] * xtemp1 + aj[5] * xtemp2; + y_ptr[j+2] += aj[6] * xtemp0 + aj[7] * xtemp1 + aj[8] * xtemp2; + y_ptr[j+3] += aj[9] * xtemp0 + aj[10] * xtemp1 + aj[11] * xtemp2; + aj += 12; + } + + for ( ; j