246 lines
7.4 KiB
C
246 lines
7.4 KiB
C
/***************************************************************************
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Copyright (c) 2013-2019, 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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#define ABS fabs
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static BLASLONG idamax_kernel_32(BLASLONG n, FLOAT *x, FLOAT *amax) {
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BLASLONG iamax;
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__asm__("vl %%v0,0(%[x])\n\t"
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"vflpdb %%v0,%%v0\n\t"
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"vleig %%v1,0,0\n\t"
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"vleig %%v1,1,1\n\t"
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"vrepig %%v2,16\n\t"
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"vzero %%v3\n\t"
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"vleig %%v24,0,0\n\t"
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"vleig %%v24,1,1\n\t"
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"vleig %%v25,2,0\n\t"
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"vleig %%v25,3,1\n\t"
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"vleig %%v26,4,0\n\t"
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"vleig %%v26,5,1\n\t"
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"vleig %%v27,6,0\n\t"
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"vleig %%v27,7,1\n\t"
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"vleig %%v28,8,0\n\t"
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"vleig %%v28,9,1\n\t"
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"vleig %%v29,10,0\n\t"
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"vleig %%v29,11,1\n\t"
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"vleig %%v30,12,0\n\t"
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"vleig %%v30,13,1\n\t"
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"vleig %%v31,14,0\n\t"
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"vleig %%v31,15,1\n\t"
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"srlg %[n],%[n],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,%[x])\n\t"
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"vl %%v16,0(%%r1,%[x])\n\t"
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"vl %%v17,16(%%r1,%[x])\n\t"
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"vl %%v18,32(%%r1,%[x])\n\t"
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"vl %%v19,48(%%r1,%[x])\n\t"
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"vl %%v20,64(%%r1,%[x])\n\t"
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"vl %%v21,80(%%r1,%[x])\n\t"
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"vl %%v22,96(%%r1,%[x])\n\t"
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"vl %%v23,112(%%r1,%[x])\n\t"
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"vflpdb %%v16, %%v16\n\t"
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"vflpdb %%v17, %%v17\n\t"
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"vflpdb %%v18, %%v18\n\t"
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"vflpdb %%v19, %%v19\n\t"
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"vflpdb %%v20, %%v20\n\t"
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"vflpdb %%v21, %%v21\n\t"
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"vflpdb %%v22, %%v22\n\t"
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"vflpdb %%v23, %%v23\n\t"
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"vfchedb %%v4,%%v16,%%v17\n\t"
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"vfchedb %%v5,%%v18,%%v19\n\t"
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"vfchedb %%v6,%%v20,%%v21\n\t"
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"vfchedb %%v7,%%v22,%%v23\n\t"
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"vsel %%v16,%%v16,%%v17,%%v4\n\t"
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"vsel %%v4,%%v24,%%v25,%%v4\n\t"
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"vsel %%v17,%%v18,%%v19,%%v5\n\t"
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"vsel %%v5,%%v26,%%v27,%%v5\n\t"
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"vsel %%v18,%%v20,%%v21,%%v6\n\t"
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"vsel %%v6,%%v28,%%v29,%%v6\n\t"
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"vsel %%v19,%%v22,%%v23,%%v7\n\t"
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"vsel %%v7,%%v30,%%v31,%%v7\n\t"
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"vfchedb %%v20,%%v16,%%v17\n\t"
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"vfchedb %%v21,%%v18,%%v19\n\t"
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"vsel %%v16,%%v16,%%v17,%%v20\n\t"
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"vsel %%v4,%%v4,%%v5,%%v20\n\t"
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"vsel %%v17,%%v18,%%v19,%%v21\n\t"
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"vsel %%v5,%%v6,%%v7,%%v21\n\t"
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"vfchedb %%v18,%%v16,%%v17\n\t"
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"vsel %%v16,%%v16,%%v17,%%v18\n\t"
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"vsel %%v4,%%v4,%%v5,%%v18\n\t"
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"vag %%v4,%%v4,%%v3\n\t"
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"vfchedb %%v5,%%v0,%%v16\n\t"
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"vsel %%v0,%%v0,%%v16,%%v5\n\t"
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"vsel %%v1,%%v1,%%v4,%%v5\n\t"
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"vag %%v3,%%v3,%%v2\n\t"
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"vl %%v16,128(%%r1,%[x])\n\t"
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"vl %%v17,144(%%r1,%[x])\n\t"
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"vl %%v18,160(%%r1,%[x])\n\t"
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"vl %%v19,176(%%r1,%[x])\n\t"
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"vl %%v20,192(%%r1,%[x])\n\t"
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"vl %%v21,208(%%r1,%[x])\n\t"
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"vl %%v22,224(%%r1,%[x])\n\t"
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"vl %%v23,240(%%r1,%[x])\n\t"
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"vflpdb %%v16, %%v16\n\t"
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"vflpdb %%v17, %%v17\n\t"
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"vflpdb %%v18, %%v18\n\t"
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"vflpdb %%v19, %%v19\n\t"
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"vflpdb %%v20, %%v20\n\t"
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"vflpdb %%v21, %%v21\n\t"
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"vflpdb %%v22, %%v22\n\t"
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"vflpdb %%v23, %%v23\n\t"
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"vfchedb %%v4,%%v16,%%v17\n\t"
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"vfchedb %%v5,%%v18,%%v19\n\t"
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"vfchedb %%v6,%%v20,%%v21\n\t"
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"vfchedb %%v7,%%v22,%%v23\n\t"
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"vsel %%v16,%%v16,%%v17,%%v4\n\t"
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"vsel %%v4,%%v24,%%v25,%%v4\n\t"
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"vsel %%v17,%%v18,%%v19,%%v5\n\t"
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"vsel %%v5,%%v26,%%v27,%%v5\n\t"
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"vsel %%v18,%%v20,%%v21,%%v6\n\t"
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"vsel %%v6,%%v28,%%v29,%%v6\n\t"
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"vsel %%v19,%%v22,%%v23,%%v7\n\t"
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"vsel %%v7,%%v30,%%v31,%%v7\n\t"
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"vfchedb %%v20,%%v16,%%v17\n\t"
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"vfchedb %%v21,%%v18,%%v19\n\t"
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"vsel %%v16,%%v16,%%v17,%%v20\n\t"
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"vsel %%v4,%%v4,%%v5,%%v20\n\t"
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"vsel %%v17,%%v18,%%v19,%%v21\n\t"
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"vsel %%v5,%%v6,%%v7,%%v21\n\t"
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"vfchedb %%v18,%%v16,%%v17\n\t"
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"vsel %%v16,%%v16,%%v17,%%v18\n\t"
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"vsel %%v4,%%v4,%%v5,%%v18\n\t"
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"vag %%v4,%%v4,%%v3\n\t"
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"vfchedb %%v5,%%v0,%%v16\n\t"
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"vsel %%v0,%%v0,%%v16,%%v5\n\t"
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"vsel %%v1,%%v1,%%v4,%%v5\n\t"
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"vag %%v3,%%v3,%%v2\n\t"
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"agfi %%r1, 256\n\t"
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"brctg %[n], 0b\n\t"
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"vrepg %%v2,%%v0,1\n\t"
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"vrepg %%v3,%%v1,1\n\t"
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"wfcdb %%v2,%%v0\n\t"
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"jne 1f\n\t"
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"vsteg %%v0,%[amax],0\n\t"
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"vmnlg %%v0,%%v1,%%v3\n\t"
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"vlgvg %[iamax],%%v0,0\n\t"
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"j 2f\n\t"
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"1:\n\t"
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"wfchdb %%v4,%%v2,%%v0\n\t"
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"vsel %%v1,%%v3,%%v1,%%v4\n\t"
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"vsel %%v0,%%v2,%%v0,%%v4\n\t"
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"std %%f0,%[amax]\n\t"
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"vlgvg %[iamax],%%v1,0\n\t"
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"2:\n\t"
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"nop 0"
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: [iamax] "=r"(iamax),[amax] "=Q"(*amax),[n] "+&r"(n)
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: "m"(*(const FLOAT (*)[n]) x),[x] "a"(x)
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: "cc", "r1", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
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"v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26",
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"v27", "v28", "v29", "v30", "v31");
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return iamax;
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}
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BLASLONG 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 maxf = 0.0;
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BLASLONG max = 0;
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if (n <= 0 || inc_x <= 0)
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return (max);
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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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max = idamax_kernel_32(n1, x, &maxf);
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i = n1;
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} else {
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maxf = 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]) > maxf) {
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max = i;
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maxf = ABS(x[i]);
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}
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i++;
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}
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return (max + 1);
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} else {
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max = 0;
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maxf = 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]) > maxf) {
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max = j;
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maxf = ABS(x[i]);
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}
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if (ABS(x[i + inc_x]) > maxf) {
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max = j + 1;
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maxf = ABS(x[i + inc_x]);
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}
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if (ABS(x[i + 2 * inc_x]) > maxf) {
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max = j + 2;
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maxf = ABS(x[i + 2 * inc_x]);
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}
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if (ABS(x[i + 3 * inc_x]) > maxf) {
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max = j + 3;
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maxf = 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]) > maxf) {
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max = j;
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maxf = 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 (max + 1);
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}
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}
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