9e2f316ede
Quoting patch author amodra from #1078 Lots of issues here. - The vsx regs weren't listed as clobbered. - Poor choice of vsx regs, which along with the lack of clobbers led to trashing v0..v21 and fr14..fr23. Ideally you'd let gcc choose all temp vsx regs, but asms currently have a limit of 30 i/o parms. - Other regs were clobbered unnecessarily, seemingly in an attempt to clobber inputs, with gcc-7 complaining about the clobber of r2. (Changed inputs should be also listed as outputs or as an i/o.) - "r" constraint used instead of "b" for gprs used in insns where the r0 encoding means zero rather than r0. - There were unused asm inputs too. - All memory was clobbered rather than hooking up memory outputs with proper memory constraints, and that and the lack of proper memory input constraints meant the asms needed to be volatile and their containing function noinline. - Some parameters were being passed unnecessarily via memory. - When a copy of a
139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
/***************************************************************************
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Copyright (c) 2013-2016, 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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/**************************************************************************************
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* 2016/03/20 Werner Saar (wernsaar@googlemail.com)
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* BLASTEST : OK
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* CTEST : OK
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* TEST : OK
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* LAPACK-TEST : OK
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**************************************************************************************/
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#include "common.h"
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#if defined(POWER8)
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#include "ddot_microk_power8.c"
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#endif
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#ifndef HAVE_KERNEL_8
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static FLOAT ddot_kernel_8 (BLASLONG n, FLOAT *x, FLOAT *y)
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{
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BLASLONG register i = 0;
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FLOAT dot = 0.0;
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while(i < n)
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{
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dot += y[i] * x[i]
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+ y[i+1] * x[i+1]
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+ y[i+2] * x[i+2]
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+ y[i+3] * x[i+3]
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+ y[i+4] * x[i+4]
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+ y[i+5] * x[i+5]
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+ y[i+6] * x[i+6]
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+ y[i+7] * x[i+7] ;
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i+=8 ;
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}
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return dot;
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}
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#endif
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FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
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{
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BLASLONG i=0;
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BLASLONG ix=0,iy=0;
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FLOAT dot = 0.0 ;
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if ( n <= 0 ) return(dot);
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if ( (inc_x == 1) && (inc_y == 1) )
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{
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BLASLONG n1 = n & -16;
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if ( n1 )
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dot = ddot_kernel_8(n1, x, y);
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i = n1;
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while(i < n)
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{
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dot += y[i] * x[i] ;
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i++ ;
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}
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return(dot);
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}
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FLOAT temp1 = 0.0;
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FLOAT temp2 = 0.0;
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BLASLONG n1 = n & -4;
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while(i < n1)
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{
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FLOAT m1 = y[iy] * x[ix] ;
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FLOAT m2 = y[iy+inc_y] * x[ix+inc_x] ;
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FLOAT m3 = y[iy+2*inc_y] * x[ix+2*inc_x] ;
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FLOAT m4 = y[iy+3*inc_y] * x[ix+3*inc_x] ;
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ix += inc_x*4 ;
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iy += inc_y*4 ;
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temp1 += m1+m3;
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temp2 += m2+m4;
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i+=4 ;
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}
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while(i < n)
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{
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temp1 += y[iy] * x[ix] ;
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ix += inc_x ;
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iy += inc_y ;
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i++ ;
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}
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dot = temp1 + temp2;
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return(dot);
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}
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