00001 /* zlarscl2.f -- translated by f2c (version 20061008). 00002 You must link the resulting object file with libf2c: 00003 on Microsoft Windows system, link with libf2c.lib; 00004 on Linux or Unix systems, link with .../path/to/libf2c.a -lm 00005 or, if you install libf2c.a in a standard place, with -lf2c -lm 00006 -- in that order, at the end of the command line, as in 00007 cc *.o -lf2c -lm 00008 Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., 00009 00010 http://www.netlib.org/f2c/libf2c.zip 00011 */ 00012 00013 #include "f2c.h" 00014 #include "blaswrap.h" 00015 00016 /* Subroutine */ int zlarscl2_(integer *m, integer *n, doublereal *d__, 00017 doublecomplex *x, integer *ldx) 00018 { 00019 /* System generated locals */ 00020 integer x_dim1, x_offset, i__1, i__2, i__3, i__4, i__5; 00021 doublecomplex z__1; 00022 00023 /* Local variables */ 00024 integer i__, j; 00025 00026 00027 /* -- LAPACK routine (version 3.2.1) -- */ 00028 /* -- Contributed by James Demmel, Deaglan Halligan, Yozo Hida and -- */ 00029 /* -- Jason Riedy of Univ. of California Berkeley. -- */ 00030 /* -- April 2009 -- */ 00031 00032 /* -- LAPACK is a software package provided by Univ. of Tennessee, -- */ 00033 /* -- Univ. of California Berkeley and NAG Ltd. -- */ 00034 00035 /* .. */ 00036 /* .. Scalar Arguments .. */ 00037 /* .. */ 00038 /* .. Array Arguments .. */ 00039 /* .. */ 00040 00041 /* Purpose */ 00042 /* ======= */ 00043 00044 /* ZLARSCL2 performs a reciprocal diagonal scaling on an vector: */ 00045 /* x <-- inv(D) * x */ 00046 /* where the DOUBLE PRECISION diagonal matrix D is stored as a vector. */ 00047 00048 /* Eventually to be replaced by BLAS_zge_diag_scale in the new BLAS */ 00049 /* standard. */ 00050 00051 /* Arguments */ 00052 /* ========= */ 00053 00054 /* M (input) INTEGER */ 00055 /* The number of rows of D and X. M >= 0. */ 00056 00057 /* N (input) INTEGER */ 00058 /* The number of columns of D and X. N >= 0. */ 00059 00060 /* D (input) DOUBLE PRECISION array, length M */ 00061 /* Diagonal matrix D, stored as a vector of length M. */ 00062 00063 /* X (input/output) COMPLEX*16 array, dimension (LDX,N) */ 00064 /* On entry, the vector X to be scaled by D. */ 00065 /* On exit, the scaled vector. */ 00066 00067 /* LDX (input) INTEGER */ 00068 /* The leading dimension of the vector X. LDX >= 0. */ 00069 00070 /* ===================================================================== */ 00071 00072 /* .. Local Scalars .. */ 00073 /* .. */ 00074 /* .. Executable Statements .. */ 00075 00076 /* Parameter adjustments */ 00077 --d__; 00078 x_dim1 = *ldx; 00079 x_offset = 1 + x_dim1; 00080 x -= x_offset; 00081 00082 /* Function Body */ 00083 i__1 = *n; 00084 for (j = 1; j <= i__1; ++j) { 00085 i__2 = *m; 00086 for (i__ = 1; i__ <= i__2; ++i__) { 00087 i__3 = i__ + j * x_dim1; 00088 i__4 = i__ + j * x_dim1; 00089 i__5 = i__; 00090 z__1.r = x[i__4].r / d__[i__5], z__1.i = x[i__4].i / d__[i__5]; 00091 x[i__3].r = z__1.r, x[i__3].i = z__1.i; 00092 } 00093 } 00094 return 0; 00095 } /* zlarscl2_ */