167 lines
5.3 KiB
C
167 lines
5.3 KiB
C
/***************************************************************************
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Copyright (c) 2013-2017, The OpenBLAS Project
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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3. Neither the name of the OpenBLAS project nor the names of
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its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBLAS PROJECT OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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#include "common.h"
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#include <math.h>
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#if defined(DOUBLE)
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#define ABS fabs
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#else
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#define ABS fabsf
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#endif
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static FLOAT damin_kernel_32(BLASLONG n, FLOAT *x)
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{
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FLOAT amin;
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__asm__ volatile (
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"vl %%v0,0(%2) \n\t"
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"srlg %%r0,%1,5 \n\t"
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"xgr %%r1,%%r1 \n\t"
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"0: \n\t"
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"pfd 1, 1024(%%r1,%2) \n\t"
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"vl %%v16,0(%%r1,%2) \n\t"
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"vl %%v17,16(%%r1,%2) \n\t"
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"vl %%v18,32(%%r1,%2) \n\t"
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"vl %%v19,48(%%r1,%2) \n\t"
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"vl %%v20,64(%%r1,%2) \n\t"
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"vl %%v21,80(%%r1,%2) \n\t"
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"vl %%v22,96(%%r1,%2) \n\t"
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"vl %%v23,112(%%r1,%2) \n\t"
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"vl %%v24,128(%%r1,%2) \n\t"
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"vl %%v25,144(%%r1,%2) \n\t"
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"vl %%v26,160(%%r1,%2) \n\t"
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"vl %%v27,176(%%r1,%2) \n\t"
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"vl %%v28,192(%%r1,%2) \n\t"
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"vl %%v29,208(%%r1,%2) \n\t"
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"vl %%v30,224(%%r1,%2) \n\t"
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"vl %%v31,240(%%r1,%2) \n\t"
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"vfmindb %%v16,%%v16,%%v24,8 \n\t"
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"vfmindb %%v17,%%v17,%%v25,8 \n\t"
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"vfmindb %%v18,%%v18,%%v26,8 \n\t"
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"vfmindb %%v19,%%v19,%%v27,8 \n\t"
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"vfmindb %%v20,%%v20,%%v28,8 \n\t"
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"vfmindb %%v21,%%v21,%%v29,8 \n\t"
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"vfmindb %%v22,%%v22,%%v30,8 \n\t"
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"vfmindb %%v23,%%v23,%%v31,8 \n\t"
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"vfmindb %%v16,%%v16,%%v20,8 \n\t"
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"vfmindb %%v17,%%v17,%%v21,8 \n\t"
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"vfmindb %%v18,%%v18,%%v22,8 \n\t"
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"vfmindb %%v19,%%v19,%%v23,8 \n\t"
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"vfmindb %%v16,%%v16,%%v18,8 \n\t"
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"vfmindb %%v17,%%v17,%%v19,8 \n\t"
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"vfmindb %%v16,%%v16,%%v17,8 \n\t"
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"vfmindb %%v0,%%v0,%%v16,8 \n\t"
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"agfi %%r1, 256 \n\t"
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"brctg %%r0, 0b \n\t"
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"vrepg %%v16,%%v0,1 \n\t"
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"wfmindb %%v0,%%v0,%%v16,8 \n\t"
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"lpdr %0,%%f0 "
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:"=f"(amin)
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:"r"(n),"ZR"((const FLOAT (*)[n])x)
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:"memory","cc","r0","r1","v0","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27","v28","v29","v30","v31"
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);
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return amin;
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}
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FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x) {
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BLASLONG i = 0;
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BLASLONG j = 0;
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FLOAT minf = 0.0;
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if (n <= 0 || inc_x <= 0) return (minf);
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if (inc_x == 1) {
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BLASLONG n1 = n & -32;
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if (n1 > 0) {
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minf = damin_kernel_32(n1, x);
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i = n1;
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}
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else
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{
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minf=ABS(x[0]);
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i++;
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}
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while (i < n) {
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if (ABS(x[i]) < minf) {
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minf = ABS(x[i]);
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}
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i++;
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}
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return (minf);
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} else {
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minf=ABS(x[0]);
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BLASLONG n1 = n & -4;
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while (j < n1) {
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if (ABS(x[i]) < minf) {
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minf = ABS(x[i]);
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}
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if (ABS(x[i + inc_x]) < minf) {
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minf = ABS(x[i + inc_x]);
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}
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if (ABS(x[i + 2 * inc_x]) < minf) {
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minf = ABS(x[i + 2 * inc_x]);
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}
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if (ABS(x[i + 3 * inc_x]) < minf) {
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minf = ABS(x[i + 3 * inc_x]);
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}
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i += inc_x * 4;
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j += 4;
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}
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while (j < n) {
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if (ABS(x[i]) < minf) {
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minf = ABS(x[i]);
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}
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i += inc_x;
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j++;
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}
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return (minf);
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}
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}
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