153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
/***************************************************************************
|
|
Copyright (c) 2013-2019, 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.
|
|
*****************************************************************************/
|
|
|
|
#include "common.h"
|
|
#include <math.h>
|
|
|
|
#define ABS fabsf
|
|
|
|
static FLOAT samax_kernel_64(BLASLONG n, FLOAT *x) {
|
|
FLOAT amax;
|
|
|
|
__asm__("vl %%v0,0(%[x])\n\t"
|
|
"srlg %[n],%[n],6\n\t"
|
|
"xgr %%r1,%%r1\n\t"
|
|
"0:\n\t"
|
|
"pfd 1, 1024(%%r1,%[x])\n\t"
|
|
"vl %%v16,0(%%r1,%[x])\n\t"
|
|
"vl %%v17,16(%%r1,%[x])\n\t"
|
|
"vl %%v18,32(%%r1,%[x])\n\t"
|
|
"vl %%v19,48(%%r1,%[x])\n\t"
|
|
"vl %%v20,64(%%r1,%[x])\n\t"
|
|
"vl %%v21,80(%%r1,%[x])\n\t"
|
|
"vl %%v22,96(%%r1,%[x])\n\t"
|
|
"vl %%v23,112(%%r1,%[x])\n\t"
|
|
"vl %%v24,128(%%r1,%[x])\n\t"
|
|
"vl %%v25,144(%%r1,%[x])\n\t"
|
|
"vl %%v26,160(%%r1,%[x])\n\t"
|
|
"vl %%v27,176(%%r1,%[x])\n\t"
|
|
"vl %%v28,192(%%r1,%[x])\n\t"
|
|
"vl %%v29,208(%%r1,%[x])\n\t"
|
|
"vl %%v30,224(%%r1,%[x])\n\t"
|
|
"vl %%v31,240(%%r1,%[x])\n\t"
|
|
"vfmaxsb %%v16,%%v16,%%v24,8\n\t"
|
|
"vfmaxsb %%v17,%%v17,%%v25,8\n\t"
|
|
"vfmaxsb %%v18,%%v18,%%v26,8\n\t"
|
|
"vfmaxsb %%v19,%%v19,%%v27,8\n\t"
|
|
"vfmaxsb %%v20,%%v20,%%v28,8\n\t"
|
|
"vfmaxsb %%v21,%%v21,%%v29,8\n\t"
|
|
"vfmaxsb %%v22,%%v22,%%v30,8\n\t"
|
|
"vfmaxsb %%v23,%%v23,%%v31,8\n\t"
|
|
"vfmaxsb %%v16,%%v16,%%v20,8\n\t"
|
|
"vfmaxsb %%v17,%%v17,%%v21,8\n\t"
|
|
"vfmaxsb %%v18,%%v18,%%v22,8\n\t"
|
|
"vfmaxsb %%v19,%%v19,%%v23,8\n\t"
|
|
"vfmaxsb %%v16,%%v16,%%v18,8\n\t"
|
|
"vfmaxsb %%v17,%%v17,%%v19,8\n\t"
|
|
"vfmaxsb %%v16,%%v16,%%v17,8\n\t"
|
|
"vfmaxsb %%v0,%%v0,%%v16,8\n\t"
|
|
"agfi %%r1, 256\n\t"
|
|
"brctg %[n], 0b\n\t"
|
|
"veslg %%v16,%%v0,32\n\t"
|
|
"vfmaxsb %%v0,%%v0,%%v16,8\n\t"
|
|
"vrepf %%v16,%%v0,2\n\t"
|
|
"wfmaxsb %%v0,%%v0,%%v16,8\n\t"
|
|
"lper %[amax],%%f0"
|
|
: [amax] "=f"(amax),[n] "+&r"(n)
|
|
: "m"(*(const FLOAT (*)[n]) x),[x] "a"(x)
|
|
: "cc", "r1", "v0", "v16", "v17", "v18", "v19", "v20", "v21", "v22",
|
|
"v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31");
|
|
|
|
return amax;
|
|
}
|
|
|
|
FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x) {
|
|
BLASLONG i = 0;
|
|
BLASLONG j = 0;
|
|
FLOAT maxf = 0.0;
|
|
|
|
if (n <= 0 || inc_x <= 0)
|
|
return (maxf);
|
|
|
|
if (inc_x == 1) {
|
|
|
|
BLASLONG n1 = n & -64;
|
|
if (n1 > 0) {
|
|
|
|
maxf = samax_kernel_64(n1, x);
|
|
|
|
i = n1;
|
|
} else {
|
|
maxf = ABS(x[0]);
|
|
i++;
|
|
}
|
|
|
|
while (i < n) {
|
|
if (ABS(x[i]) > maxf) {
|
|
maxf = ABS(x[i]);
|
|
}
|
|
i++;
|
|
}
|
|
return (maxf);
|
|
|
|
} else {
|
|
|
|
maxf = ABS(x[0]);
|
|
|
|
BLASLONG n1 = n & -4;
|
|
while (j < n1) {
|
|
|
|
if (ABS(x[i]) > maxf) {
|
|
maxf = ABS(x[i]);
|
|
}
|
|
if (ABS(x[i + inc_x]) > maxf) {
|
|
maxf = ABS(x[i + inc_x]);
|
|
}
|
|
if (ABS(x[i + 2 * inc_x]) > maxf) {
|
|
maxf = ABS(x[i + 2 * inc_x]);
|
|
}
|
|
if (ABS(x[i + 3 * inc_x]) > maxf) {
|
|
maxf = ABS(x[i + 3 * inc_x]);
|
|
}
|
|
|
|
i += inc_x * 4;
|
|
|
|
j += 4;
|
|
|
|
}
|
|
|
|
while (j < n) {
|
|
if (ABS(x[i]) > maxf) {
|
|
maxf = ABS(x[i]);
|
|
}
|
|
i += inc_x;
|
|
j++;
|
|
}
|
|
return (maxf);
|
|
}
|
|
}
|