/* * cblas_zher.c * The program is a C interface to zher. * * Keita Teranishi 5/20/98 * */ #include #include #include "cblas.h" #include "cblas_f77.h" void cblas_zher(const CBLAS_LAYOUT layout, const CBLAS_UPLO Uplo, const CBLAS_INT N, const double alpha, const void *X, const CBLAS_INT incX ,void *A, const CBLAS_INT lda) { char UL; #ifdef F77_CHAR F77_CHAR F77_UL; #else #define F77_UL &UL #endif #ifdef F77_INT F77_INT F77_N=N, F77_lda=lda, F77_incX=incX; #else #define F77_N N #define F77_lda lda #define F77_incX incx #endif CBLAS_INT n, i, tincx, incx=incX; double *x=(double *)X, *xx=(double *)X, *tx, *st; extern int CBLAS_CallFromC; extern int RowMajorStrg; RowMajorStrg = 0; CBLAS_CallFromC = 1; if (layout == CblasColMajor) { if (Uplo == CblasLower) UL = 'L'; else if (Uplo == CblasUpper) UL = 'U'; else { cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n",Uplo ); CBLAS_CallFromC = 0; RowMajorStrg = 0; return; } #ifdef F77_CHAR F77_UL = C2F_CHAR(&UL); #endif F77_zher(F77_UL, &F77_N, &alpha, X, &F77_incX, A, &F77_lda); } else if (layout == CblasRowMajor) { RowMajorStrg = 1; if (Uplo == CblasUpper) UL = 'L'; else if (Uplo == CblasLower) UL = 'U'; else { cblas_xerbla(2, "cblas_zher","Illegal Uplo setting, %d\n", Uplo); CBLAS_CallFromC = 0; RowMajorStrg = 0; return; } #ifdef F77_CHAR F77_UL = C2F_CHAR(&UL); #endif if (N > 0) { n = N << 1; x = malloc(n*sizeof(double)); 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; #ifdef F77_INT F77_incX = 1; #else incx = 1; #endif } else x = (double *) X; F77_zher(F77_UL, &F77_N, &alpha, x, &F77_incX, A, &F77_lda); } else cblas_xerbla(1, "cblas_zher", "Illegal layout setting, %d\n", layout); if(X!=x) free(x); CBLAS_CallFromC = 0; RowMajorStrg = 0; return; }