OpenBLAS/lapack-netlib/CBLAS/src/cblas_cgemv.c at v0.3.23 · OpenMathLib/OpenBLAS · GitHub

Name: OpenBLAS/lapack-netlib/CBLAS/src/cblas_cgemv.c at v0.3.23 · OpenMathLib/OpenBLAS · GitHub
Rating: 4.6 (6785 reviews)
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/*
 * cblas_cgemv.c
 * The program is a C interface of cgemv
 *
 * Keita Teranishi 5/20/98
 *
 */
#include<stdio.h>
#include<stdlib.h>
#include"cblas.h"
#include"cblas_f77.h"
voidcblas_cgemv(constCBLAS_LAYOUTlayout,
constCBLAS_TRANSPOSETransA, constintM, constintN,
constvoid*alpha, constvoid*A, constintlda,
constvoid*X, constintincX, constvoid*beta,
void*Y, constintincY)
{
charTA;
#ifdefF77_CHAR
F77_CHARF77_TA;
#else
#defineF77_TA &TA
#endif
#ifdefF77_INT
F77_INTF77_M=M, F77_N=N, F77_lda=lda, F77_incX=incX, F77_incY=incY;
#else
#defineF77_M M
#defineF77_N N
#defineF77_lda lda
#defineF77_incX incx
#defineF77_incY incY
#endif

intn=0, i=0, incx=incX;
constfloat*xx= (constfloat*)X;
floatALPHA[2],BETA[2];
inttincY, tincx;
float*x=(float*)X, *y=(float*)Y, *st=0, *tx=0;
constfloat*stx=x;
externintCBLAS_CallFromC;
externintRowMajorStrg;
RowMajorStrg=0;

CBLAS_CallFromC=1;

if (layout==CblasColMajor)
 {
if (TransA==CblasNoTrans) TA='N';
elseif (TransA==CblasTrans) TA='T';
elseif (TransA==CblasConjTrans) TA='C';
else
 {
cblas_xerbla(2, "cblas_cgemv","Illegal TransA setting, %d\n", TransA);
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
 }
#ifdefF77_CHAR
F77_TA=C2F_CHAR(&TA);
#endif
F77_cgemv(F77_TA, &F77_M, &F77_N, alpha, A, &F77_lda, X, &F77_incX,
beta, Y, &F77_incY);
 }
elseif (layout==CblasRowMajor)
 {
RowMajorStrg=1;

if (TransA==CblasNoTrans) TA='T';
elseif (TransA==CblasTrans) TA='N';
elseif (TransA==CblasConjTrans)
 {
ALPHA[0]=*( (constfloat*) alpha );
ALPHA[1]=-( *( (constfloat*) alpha+1) );
BETA[0]=*( (constfloat*) beta );
BETA[1]=-( *( (constfloat*) beta+1 ) );
TA='N';
if (M>0)
 {
n=M << 1;
x=malloc(n*sizeof(float));
tx=x;
if( incX>0 ) {
i=incX << 1 ;
tincx=2;
st=x+n;
 } else {
i=incX*(-2);
tincx=-2;
st=x-2;
x+=(n-2);
 }

do
 {
*x=*xx;
x[1] =-xx[1];
x+=tincx ;
xx+=i;
 }
while (x!=st);
x=tx;

F77_incX=1;

if(incY>0)
tincY=incY;
else
tincY=-incY;

y++;

if (N>0)
 {
i=tincY << 1;
n=i*N ;
st=y+n;
do {
*y=-(*y);
y+=i;
 } while(y!=st);
y-=n;
 }
stx=x;
 }
elsestx= (constfloat*)X;
 }
else
 {
cblas_xerbla(2, "cblas_cgemv","Illegal TransA setting, %d\n", TransA);
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
 }
#ifdefF77_CHAR
F77_TA=C2F_CHAR(&TA);
#endif
if (TransA==CblasConjTrans)
F77_cgemv(F77_TA, &F77_N, &F77_M, ALPHA, A, &F77_lda, stx,
&F77_incX, BETA, Y, &F77_incY);
else
F77_cgemv(F77_TA, &F77_N, &F77_M, alpha, A, &F77_lda, x,
&F77_incX, beta, Y, &F77_incY);

if (TransA==CblasConjTrans)
 {
if (x!= (constfloat*)X) free(x);
if (N>0)
 {
do
 {
*y=-(*y);
y+=i;
 }
while (y!=st);
 }
 }
 }
elsecblas_xerbla(1, "cblas_cgemv", "Illegal layout setting, %d\n", layout);
CBLAS_CallFromC=0;
RowMajorStrg=0;
return;
}