e7e3aa2948
If e.g. -march=haswell is set in CFLAGS, GCC generates FMAs by default, which is inconsistent with the microkernels, none of which use FMAs. These inconsistencies cause a few failures in the LAPACK testcases, where eigenvalue results with/without eigenvectors are compared. Moreover using FMAs for multiplication of complex numbers can give surprising results, see22aa81ffor more information. This uses the same syntax as used in22aa81ffor zarch (s390x).
448 lines
8.2 KiB
C
448 lines
8.2 KiB
C
/***************************************************************************
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Copyright (c) 2013 - 2015, 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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* Avoid contraction of floating point operations, specifically fused
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* multiply-add, because they can cause unexpected results in complex
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* multiplication.
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*/
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#if defined(__GNUC__) && !defined(__clang__)
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#pragma GCC optimize ("fp-contract=off")
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#endif
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#if defined(__clang__)
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#pragma clang fp contract(off)
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#endif
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#include "common.h"
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#if defined(HASWELL) || defined(ZEN) || defined (SKYLAKEX) || defined (COOPERLAKE) || defined (SAPPHIRERAPIDS)
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#include "zscal_microk_haswell-2.c"
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#elif defined(BULLDOZER) || defined(PILEDRIVER)
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#include "zscal_microk_bulldozer-2.c"
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#elif defined(STEAMROLLER) || defined(EXCAVATOR)
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#include "zscal_microk_steamroller-2.c"
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#endif
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#if !defined(HAVE_KERNEL_8)
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static void zscal_kernel_8( BLASLONG n, FLOAT *alpha , FLOAT *x ) __attribute__ ((noinline));
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static void zscal_kernel_8_zero( BLASLONG n, FLOAT *alpha , FLOAT *x ) __attribute__ ((noinline));
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static void zscal_kernel_8_zero_r( BLASLONG n, FLOAT *alpha , FLOAT *x ) __attribute__ ((noinline));
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static void zscal_kernel_8_zero_i( BLASLONG n, FLOAT *alpha , FLOAT *x ) __attribute__ ((noinline));
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static void zscal_kernel_8( BLASLONG n, FLOAT *alpha , FLOAT *x )
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{
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BLASLONG i;
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FLOAT da_r = alpha[0];
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FLOAT da_i = alpha[1];
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FLOAT t0,t1,t2,t3;
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for( i=0; i<n; i+=4 )
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{
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t0 = da_r *x[0] - da_i *x[1];
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t1 = da_r *x[2] - da_i *x[3];
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t2 = da_r *x[4] - da_i *x[5];
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t3 = da_r *x[6] - da_i *x[7];
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x[1] = da_r * x[1] + da_i * x[0];
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x[3] = da_r * x[3] + da_i * x[2];
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x[5] = da_r * x[5] + da_i * x[4];
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x[7] = da_r * x[7] + da_i * x[6];
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x[0] = t0;
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x[2] = t1;
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x[4] = t2;
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x[6] = t3;
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x+=8;
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}
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}
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static void zscal_kernel_8_zero_r( BLASLONG n, FLOAT *alpha , FLOAT *x )
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{
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BLASLONG i;
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FLOAT da_i = alpha[1];
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FLOAT t0,t1,t2,t3;
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for( i=0; i<n; i+=4 )
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{
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t0 = - da_i *x[1];
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t1 = - da_i *x[3];
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t2 = - da_i *x[5];
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t3 = - da_i *x[7];
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x[1] = da_i * x[0];
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x[3] = da_i * x[2];
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x[5] = da_i * x[4];
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x[7] = da_i * x[6];
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x[0] = t0;
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x[2] = t1;
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x[4] = t2;
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x[6] = t3;
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x+=8;
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}
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}
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static void zscal_kernel_8_zero_i( BLASLONG n, FLOAT *alpha , FLOAT *x )
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{
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BLASLONG i;
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FLOAT da_r = alpha[0];
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FLOAT t0,t1,t2,t3;
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for( i=0; i<n; i+=4 )
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{
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t0 = da_r *x[0];
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t1 = da_r *x[2];
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t2 = da_r *x[4];
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t3 = da_r *x[6];
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x[1] = da_r * x[1];
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x[3] = da_r * x[3];
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x[5] = da_r * x[5];
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x[7] = da_r * x[7];
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x[0] = t0;
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x[2] = t1;
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x[4] = t2;
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x[6] = t3;
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x+=8;
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}
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}
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static void zscal_kernel_8_zero( BLASLONG n, FLOAT *alpha , FLOAT *x )
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{
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BLASLONG i;
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for( i=0; i<n; i+=4 )
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{
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x[0] = 0.0;
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x[1] = 0.0;
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x[2] = 0.0;
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x[3] = 0.0;
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x[4] = 0.0;
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x[5] = 0.0;
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x[6] = 0.0;
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x[7] = 0.0;
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x+=8;
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}
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}
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#endif
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static void zscal_kernel_inc_8(BLASLONG n, FLOAT *alpha, FLOAT *x, BLASLONG inc_x) __attribute__ ((noinline));
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static void zscal_kernel_inc_8(BLASLONG n, FLOAT *alpha, FLOAT *x, BLASLONG inc_x)
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{
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BLASLONG i;
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BLASLONG inc_x2 = 2 * inc_x;
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BLASLONG inc_x3 = inc_x2 + inc_x;
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FLOAT t0,t1,t2,t3;
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FLOAT da_r = alpha[0];
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FLOAT da_i = alpha[1];
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for ( i=0; i<n; i+=4 )
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{
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t0 = da_r * x[0] - da_i *x[1];
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t1 = da_r * x[inc_x] - da_i *x[inc_x + 1];
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t2 = da_r * x[inc_x2] - da_i *x[inc_x2 + 1];
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t3 = da_r * x[inc_x3] - da_i *x[inc_x3 + 1];
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x[1] = da_i * x[0] + da_r * x[1];
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x[inc_x +1] = da_i * x[inc_x] + da_r * x[inc_x +1];
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x[inc_x2 +1] = da_i * x[inc_x2] + da_r * x[inc_x2 +1];
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x[inc_x3 +1] = da_i * x[inc_x3] + da_r * x[inc_x3 +1];
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x[0] = t0;
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x[inc_x] = t1;
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x[inc_x2] = t2;
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x[inc_x3] = t3;
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x+=4*inc_x;
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}
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}
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int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r, FLOAT da_i, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
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{
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BLASLONG i=0,j=0;
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FLOAT temp0;
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FLOAT temp1;
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FLOAT alpha[2];
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if ( inc_x != 1 )
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{
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inc_x <<= 1;
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if ( da_r == 0.0 )
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{
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BLASLONG n1 = n & -2;
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if ( da_i == 0.0 )
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{
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while(j < n1)
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{
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x[i]=0.0;
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x[i+1]=0.0;
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x[i+inc_x]=0.0;
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x[i+1+inc_x]=0.0;
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i += 2*inc_x ;
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j+=2;
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}
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while(j < n)
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{
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x[i]=0.0;
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x[i+1]=0.0;
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i += inc_x ;
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j++;
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}
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}
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else
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{
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while(j < n1)
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{
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temp0 = -da_i * x[i+1];
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x[i+1] = da_i * x[i];
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x[i] = temp0;
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temp1 = -da_i * x[i+1+inc_x];
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x[i+1+inc_x] = da_i * x[i+inc_x];
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x[i+inc_x] = temp1;
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i += 2*inc_x ;
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j+=2;
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}
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while(j < n)
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{
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temp0 = -da_i * x[i+1];
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x[i+1] = da_i * x[i];
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x[i] = temp0;
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i += inc_x ;
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j++;
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}
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}
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}
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else
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{
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if ( da_i == 0.0 )
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{
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BLASLONG n1 = n & -2;
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while(j < n1)
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{
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temp0 = da_r * x[i];
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x[i+1] = da_r * x[i+1];
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x[i] = temp0;
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temp1 = da_r * x[i+inc_x];
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x[i+1+inc_x] = da_r * x[i+1+inc_x];
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x[i+inc_x] = temp1;
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i += 2*inc_x ;
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j+=2;
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}
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while(j < n)
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{
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temp0 = da_r * x[i];
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x[i+1] = da_r * x[i+1];
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x[i] = temp0;
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i += inc_x ;
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j++;
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}
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}
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else
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{
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BLASLONG n1 = n & -8;
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if ( n1 > 0 )
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{
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alpha[0] = da_r;
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alpha[1] = da_i;
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zscal_kernel_inc_8(n1, alpha, x, inc_x);
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j = n1 ;
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i = n1 * inc_x;
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}
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while(j < n)
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{
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temp0 = da_r * x[i] - da_i * x[i+1];
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x[i+1] = da_r * x[i+1] + da_i * x[i];
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x[i] = temp0;
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i += inc_x ;
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j++;
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}
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}
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}
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return(0);
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}
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BLASLONG n1 = n & -8;
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if ( n1 > 0 )
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{
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alpha[0] = da_r;
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alpha[1] = da_i;
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if ( da_r == 0.0 )
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if ( da_i == 0 )
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zscal_kernel_8_zero(n1 , alpha , x);
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else
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zscal_kernel_8_zero_r(n1 , alpha , x);
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else
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if ( da_i == 0 )
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zscal_kernel_8_zero_i(n1 , alpha , x);
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else
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zscal_kernel_8(n1 , alpha , x);
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i = n1 << 1;
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j = n1;
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}
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if ( da_r == 0.0 )
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{
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if ( da_i == 0.0 )
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{
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while(j < n)
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{
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x[i]=0.0;
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x[i+1]=0.0;
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i += 2 ;
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j++;
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}
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}
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else
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{
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while(j < n)
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{
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temp0 = -da_i * x[i+1];
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x[i+1] = da_i * x[i];
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x[i] = temp0;
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i += 2 ;
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j++;
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}
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}
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}
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else
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{
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if ( da_i == 0.0 )
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{
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while(j < n)
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{
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temp0 = da_r * x[i];
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x[i+1] = da_r * x[i+1];
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x[i] = temp0;
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i += 2 ;
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j++;
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}
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}
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else
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{
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while(j < n)
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{
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temp0 = da_r * x[i] - da_i * x[i+1];
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x[i+1] = da_r * x[i+1] + da_i * x[i];
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x[i] = temp0;
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i += 2 ;
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j++;
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}
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}
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}
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return(0);
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}
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