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OpenBLAS/kernel/power/sgemv_n.c

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/***************************************************************************
Copyright (c) 2019, 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.
*****************************************************************************/
#if !defined(__VEC__) || !defined(__ALTIVEC__)
#include "../arm/gemv_n.c"
#else
#include <altivec.h>
#include "common.h"
#define NBMAX 4096
static void sgemv_kernel_4x8(BLASLONG n, FLOAT **ap, FLOAT *xo, FLOAT *y,
BLASLONG lda4, FLOAT *alpha) {
BLASLONG i;
FLOAT *a0, *a1, *a2, *a3, *b0, *b1, *b2, *b3;
FLOAT x0, x1, x2, x3, x4, x5, x6, x7;
a0 = ap[0];
a1 = ap[1];
a2 = ap[2];
a3 = ap[3];
b0 = a0 + lda4;
b1 = a1 + lda4;
b2 = a2 + lda4;
b3 = a3 + lda4;
x0 = xo[0] * (*alpha);
x1 = xo[1] * (*alpha);
x2 = xo[2] * (*alpha);
x3 = xo[3] * (*alpha);
x4 = xo[4] * (*alpha);
x5 = xo[5] * (*alpha);
x6 = xo[6] * (*alpha);
x7 = xo[7] * (*alpha);
__vector float v_x0 = {x0, x0, x0, x0};
__vector float v_x1 = {x1, x1, x1, x1};
__vector float v_x2 = {x2, x2, x2, x2};
__vector float v_x3 = {x3, x3, x3, x3};
__vector float v_x4 = {x4, x4, x4, x4};
__vector float v_x5 = {x5, x5, x5, x5};
__vector float v_x6 = {x6, x6, x6, x6};
__vector float v_x7 = {x7, x7, x7, x7};
for (i = 0; i < n; i += 4) {
__vector float vy = vec_vsx_ld(0, &y[i]);
__vector float va0 = vec_vsx_ld(0, &a0[i]);
__vector float va1 = vec_vsx_ld(0, &a1[i]);
__vector float va2 = vec_vsx_ld(0, &a2[i]);
__vector float va3 = vec_vsx_ld(0, &a3[i]);
__vector float vb0 = vec_vsx_ld(0, &b0[i]);
__vector float vb1 = vec_vsx_ld(0, &b1[i]);
__vector float vb2 = vec_vsx_ld(0, &b2[i]);
__vector float vb3 = vec_vsx_ld(0, &b3[i]);
vy += v_x0 * va0 + v_x1 * va1 + v_x2 * va2 + v_x3 * va3;
vy += v_x4 * vb0 + v_x5 * vb1 + v_x6 * vb2 + v_x7 * vb3;
vec_vsx_st(vy, 0, &y[i]);
}
}
static void sgemv_kernel_4x4(BLASLONG n, FLOAT **ap, FLOAT *xo, FLOAT *y,
FLOAT *alpha) {
BLASLONG i;
FLOAT x0, x1, x2, x3;
FLOAT *a0, *a1, *a2, *a3;
a0 = ap[0];
a1 = ap[1];
a2 = ap[2];
a3 = ap[3];
x0 = xo[0] * (*alpha);
x1 = xo[1] * (*alpha);
x2 = xo[2] * (*alpha);
x3 = xo[3] * (*alpha);
__vector float v_x0 = {x0, x0, x0, x0};
__vector float v_x1 = {x1, x1, x1, x1};
__vector float v_x2 = {x2, x2, x2, x2};
__vector float v_x3 = {x3, x3, x3, x3};
for (i = 0; i < n; i += 4) {
__vector float vy = vec_vsx_ld(0, &y[i]);
__vector float va0 = vec_vsx_ld(0, &a0[i]);
__vector float va1 = vec_vsx_ld(0, &a1[i]);
__vector float va2 = vec_vsx_ld(0, &a2[i]);
__vector float va3 = vec_vsx_ld(0, &a3[i]);
vy += v_x0 * va0 + v_x1 * va1 + v_x2 * va2 + v_x3 * va3;
vec_vsx_st(vy, 0, &y[i]);
}
}
static void sgemv_kernel_4x2(BLASLONG n, FLOAT **ap, FLOAT *x, FLOAT *y,
FLOAT *alpha) {
BLASLONG i;
FLOAT x0, x1;
FLOAT *a0, *a1;
a0 = ap[0];
a1 = ap[1];
x0 = x[0] * (*alpha);
x1 = x[1] * (*alpha);
__vector float v_x0 = {x0, x0, x0, x0};
__vector float v_x1 = {x1, x1, x1, x1};
for (i = 0; i < n; i += 4) {
__vector float vy = vec_vsx_ld(0, &y[i]);
__vector float va0 = vec_vsx_ld(0, &a0[i]);
__vector float va1 = vec_vsx_ld(0, &a1[i]);
vy += v_x0 * va0 + v_x1 * va1;
vec_vsx_st(vy, 0, &y[i]);
}
}
static void sgemv_kernel_4x1(BLASLONG n, FLOAT *ap, FLOAT *x, FLOAT *y,
FLOAT *alpha) {
BLASLONG i;
FLOAT x0 = x[0] * (*alpha);
__vector float v_x0 = {x0, x0, x0, x0};
for (i = 0; i < n; i += 4) {
__vector float vy = vec_vsx_ld(0, &y[i]);
__vector float va0 = vec_vsx_ld(0, &ap[i]);
vy += v_x0 * va0;
vec_vsx_st(vy, 0, &y[i]);
}
}
static void add_y(BLASLONG n, FLOAT *src, FLOAT *dest, BLASLONG inc_dest) {
BLASLONG i;
for (i = 0; i < n; i++) {
*dest += *src;
src++;
dest += inc_dest;
}
return;
}
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 i, n1, m1, m2, m3, n2, lda4, lda8;
FLOAT *a_ptr, *x_ptr, *y_ptr, *ap[4];
lda4 = lda << 2;
lda8 = lda << 3;
FLOAT xbuffer[8] __attribute__((aligned(16)));
FLOAT *ybuffer = buffer;
if (m < 1) return (0);
if (n < 1) return (0);
if (inc_x == 1) {
n1 = n >> 3;
n2 = n & 7;
} else {
n1 = n >> 2;
n2 = n & 3;
}
m3 = m & 3;
m1 = m & -4;
m2 = (m & (NBMAX - 1)) - m3;
y_ptr = y;
BLASLONG NB = NBMAX;
while (NB == NBMAX) {
m1 -= NB;
if (m1 < 0) {
if (m2 == 0) break;
NB = m2;
}
a_ptr = a;
x_ptr = x;
ap[0] = a_ptr;
ap[1] = a_ptr + lda;
ap[2] = ap[1] + lda;
ap[3] = ap[2] + lda;
if (inc_y != 1)
memset(ybuffer, 0, NB * 4);
else
ybuffer = y_ptr;
if (inc_x == 1) {
for (i = 0; i < n1; i++) {
sgemv_kernel_4x8(NB, ap, x_ptr, ybuffer, lda4, &alpha);
ap[0] += lda8;
ap[1] += lda8;
ap[2] += lda8;
ap[3] += lda8;
a_ptr += lda8;
x_ptr += 8;
}
if (n2 & 4) {
sgemv_kernel_4x4(NB, ap, x_ptr, ybuffer, &alpha);
ap[0] += lda4;
ap[1] += lda4;
ap[2] += lda4;
ap[3] += lda4;
a_ptr += lda4;
x_ptr += 4;
}
if (n2 & 2) {
sgemv_kernel_4x2(NB, ap, x_ptr, ybuffer, &alpha);
a_ptr += lda * 2;
x_ptr += 2;
}
if (n2 & 1) {
sgemv_kernel_4x1(NB, a_ptr, x_ptr, ybuffer, &alpha);
a_ptr += lda;
x_ptr += 1;
}
} else {
for (i = 0; i < n1; i++) {
xbuffer[0] = x_ptr[0];
x_ptr += inc_x;
xbuffer[1] = x_ptr[0];
x_ptr += inc_x;
xbuffer[2] = x_ptr[0];
x_ptr += inc_x;
xbuffer[3] = x_ptr[0];
x_ptr += inc_x;
sgemv_kernel_4x4(NB, ap, xbuffer, ybuffer, &alpha);
ap[0] += lda4;
ap[1] += lda4;
ap[2] += lda4;
ap[3] += lda4;
a_ptr += lda4;
}
for (i = 0; i < n2; i++) {
xbuffer[0] = x_ptr[0];
x_ptr += inc_x;
sgemv_kernel_4x1(NB, a_ptr, xbuffer, ybuffer, &alpha);
a_ptr += lda;
}
}
a += NB;
if (inc_y != 1) {
add_y(NB, ybuffer, y_ptr, inc_y);
y_ptr += NB * inc_y;
} else
y_ptr += NB;
}
if (m3 == 0) return (0);
if (m3 == 3) {
a_ptr = a;
x_ptr = x;
FLOAT temp0 = 0.0;
FLOAT temp1 = 0.0;
FLOAT temp2 = 0.0;
if (lda == 3 && inc_x == 1) {
for (i = 0; i < (n & -4); i += 4) {
temp0 += a_ptr[0] * x_ptr[0] + a_ptr[3] * x_ptr[1];
temp1 += a_ptr[1] * x_ptr[0] + a_ptr[4] * x_ptr[1];
temp2 += a_ptr[2] * x_ptr[0] + a_ptr[5] * x_ptr[1];
temp0 += a_ptr[6] * x_ptr[2] + a_ptr[9] * x_ptr[3];
temp1 += a_ptr[7] * x_ptr[2] + a_ptr[10] * x_ptr[3];
temp2 += a_ptr[8] * x_ptr[2] + a_ptr[11] * x_ptr[3];
a_ptr += 12;
x_ptr += 4;
}
for (; i < n; i++) {
temp0 += a_ptr[0] * x_ptr[0];
temp1 += a_ptr[1] * x_ptr[0];
temp2 += a_ptr[2] * x_ptr[0];
a_ptr += 3;
x_ptr++;
}
} else {
for (i = 0; i < n; i++) {
temp0 += a_ptr[0] * x_ptr[0];
temp1 += a_ptr[1] * x_ptr[0];
temp2 += a_ptr[2] * x_ptr[0];
a_ptr += lda;
x_ptr += inc_x;
}
}
y_ptr[0] += alpha * temp0;
y_ptr += inc_y;
y_ptr[0] += alpha * temp1;
y_ptr += inc_y;
y_ptr[0] += alpha * temp2;
return (0);
}
if (m3 == 2) {
a_ptr = a;
x_ptr = x;
FLOAT temp0 = 0.0;
FLOAT temp1 = 0.0;
if (lda == 2 && inc_x == 1) {
for (i = 0; i < (n & -4); i += 4) {
temp0 += a_ptr[0] * x_ptr[0] + a_ptr[2] * x_ptr[1];
temp1 += a_ptr[1] * x_ptr[0] + a_ptr[3] * x_ptr[1];
temp0 += a_ptr[4] * x_ptr[2] + a_ptr[6] * x_ptr[3];
temp1 += a_ptr[5] * x_ptr[2] + a_ptr[7] * x_ptr[3];
a_ptr += 8;
x_ptr += 4;
}
for (; i < n; i++) {
temp0 += a_ptr[0] * x_ptr[0];
temp1 += a_ptr[1] * x_ptr[0];
a_ptr += 2;
x_ptr++;
}
} else {
for (i = 0; i < n; i++) {
temp0 += a_ptr[0] * x_ptr[0];
temp1 += a_ptr[1] * x_ptr[0];
a_ptr += lda;
x_ptr += inc_x;
}
}
y_ptr[0] += alpha * temp0;
y_ptr += inc_y;
y_ptr[0] += alpha * temp1;
return (0);
}
if (m3 == 1) {
a_ptr = a;
x_ptr = x;
FLOAT temp = 0.0;
if (lda == 1 && inc_x == 1) {
for (i = 0; i < (n & -4); i += 4) {
temp += a_ptr[i] * x_ptr[i] + a_ptr[i + 1] * x_ptr[i + 1] +
a_ptr[i + 2] * x_ptr[i + 2] +
a_ptr[i + 3] * x_ptr[i + 3];
}
for (; i < n; i++) {
temp += a_ptr[i] * x_ptr[i];
}
} else {
for (i = 0; i < n; i++) {
temp += a_ptr[0] * x_ptr[0];
a_ptr += lda;
x_ptr += inc_x;
}
}
y_ptr[0] += alpha * temp;
return (0);
}
return (0);
}
#endif
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