247 lines
8.8 KiB
C
247 lines
8.8 KiB
C
/***************************************************************************
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Copyright (c) 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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#define CABS1(x,i) (ABS(x[i]) + ABS(x[i + 1]))
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static BLASLONG izamin_kernel_16(BLASLONG n, FLOAT *x, FLOAT *amin)
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{
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BLASLONG iamin;
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__asm__ volatile (
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"vleg %%v0,0(%3),0 \n\t"
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"vleg %%v1,8(%3),0 \n\t"
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"vleg %%v0,16(%3),1 \n\t"
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"vleg %%v1,24(%3),1 \n\t"
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"vflpdb %%v0,%%v0 \n\t"
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"vflpdb %%v1,%%v1 \n\t"
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"vfadb %%v0,%%v0,%%v1 \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 %%v2,8 \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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"srlg %%r0,%2,4 \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,%3) \n\t"
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"vleg %%v16,0(%%r1,%3),0 \n\t"
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"vleg %%v17,8(%%r1,%3),0 \n\t"
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"vleg %%v16,16(%%r1,%3),1 \n\t"
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"vleg %%v17,24(%%r1,%3),1 \n\t"
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"vleg %%v18,32(%%r1,%3),0 \n\t"
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"vleg %%v19,40(%%r1,%3),0 \n\t"
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"vleg %%v18,48(%%r1,%3),1 \n\t"
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"vleg %%v19,56(%%r1,%3),1 \n\t"
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"vleg %%v20,64(%%r1,%3),0 \n\t"
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"vleg %%v21,72(%%r1,%3),0 \n\t"
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"vleg %%v20,80(%%r1,%3),1 \n\t"
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"vleg %%v21,88(%%r1,%3),1 \n\t"
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"vleg %%v22,96(%%r1,%3),0 \n\t"
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"vleg %%v23,104(%%r1,%3),0 \n\t"
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"vleg %%v22,112(%%r1,%3),1 \n\t"
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"vleg %%v23,120(%%r1,%3),1 \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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"vfadb %%v16,%%v16,%%v17 \n\t"
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"vfadb %%v17,%%v18,%%v19 \n\t"
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"vfadb %%v18,%%v20,%%v21 \n\t"
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"vfadb %%v19,%%v22,%%v23 \n\t"
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"vfchedb %%v4,%%v17,%%v16 \n\t"
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"vfchedb %%v5,%%v19,%%v18 \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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"vfchedb %%v18,%%v17,%%v16 \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,%%v16,%%v0 \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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"vleg %%v16,128(%%r1,%3),0 \n\t"
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"vleg %%v17,136(%%r1,%3),0 \n\t"
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"vleg %%v16,144(%%r1,%3),1 \n\t"
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"vleg %%v17,152(%%r1,%3),1 \n\t"
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"vleg %%v18,160(%%r1,%3),0 \n\t"
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"vleg %%v19,168(%%r1,%3),0 \n\t"
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"vleg %%v18,176(%%r1,%3),1 \n\t"
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"vleg %%v19,184(%%r1,%3),1 \n\t"
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"vleg %%v20,192(%%r1,%3),0 \n\t"
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"vleg %%v21,200(%%r1,%3),0 \n\t"
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"vleg %%v20,208(%%r1,%3),1 \n\t"
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"vleg %%v21,216(%%r1,%3),1 \n\t"
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"vleg %%v22,224(%%r1,%3),0 \n\t"
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"vleg %%v23,232(%%r1,%3),0 \n\t"
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"vleg %%v22,240(%%r1,%3),1 \n\t"
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"vleg %%v23,248(%%r1,%3),1 \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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"vfadb %%v16,%%v16,%%v17 \n\t"
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"vfadb %%v17,%%v18,%%v19 \n\t"
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"vfadb %%v18,%%v20,%%v21 \n\t"
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"vfadb %%v19,%%v22,%%v23 \n\t"
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"vfchedb %%v4,%%v17,%%v16 \n\t"
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"vfchedb %%v5,%%v19,%%v18 \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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"vfchedb %%v18,%%v17,%%v16 \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,%%v16,%%v0 \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 %%r0, 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,%1,0 \n\t"
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"vmnlg %%v0,%%v1,%%v3 \n\t"
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"vlgvg %0,%%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,%%v0,%%v2 \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,%1 \n\t"
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"vlgvg %0,%%v1,0 \n\t"
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"2: \n\t"
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"nop "
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:"=r"(iamin),"=m"(*amin)
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:"r"(n),"ZR"((const FLOAT (*)[n * 2])x)
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:"memory","cc","r0","r1","v0","v1","v2","v3","v4","v5","v16","v17","v18","v19","v20","v21","v22","v23","v24","v25","v26","v27"
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);
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return iamin;
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}
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BLASLONG CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x)
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{
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BLASLONG i = 0;
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BLASLONG ix = 0;
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FLOAT minf = 0;
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BLASLONG min = 0;
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BLASLONG inc_x2;
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if (n <= 0 || inc_x <= 0) return(min);
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if (inc_x == 1) {
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BLASLONG n1 = n & -16;
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if (n1 > 0) {
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min = izamin_kernel_16(n1, x, &minf);
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ix = n1 * 2;
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i = n1;
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}
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else
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{
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minf = CABS1(x,0);
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ix += 2;
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i++;
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}
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while(i < n)
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{
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if( CABS1(x,ix) < minf )
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{
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min = i;
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minf = CABS1(x,ix);
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}
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ix += 2;
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i++;
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}
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return (min + 1);
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} else {
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min = 0;
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minf = CABS1(x,0);
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inc_x2 = 2 * inc_x;
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ix += inc_x2;
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i++;
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while(i < n)
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{
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if( CABS1(x,ix) < minf )
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{
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min = i;
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minf = CABS1(x,ix);
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}
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ix += inc_x2;
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i++;
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}
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return (min + 1);
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}
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}
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