.TH "BLAS/SRC/srotmg.f" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
BLAS/SRC/srotmg.f
.SH SYNOPSIS
.br
.PP
.SS "Functions/Subroutines"

.in +1c
.ti -1c
.RI "subroutine \fBsrotmg\fP (sd1, sd2, sx1, sy1, sparam)"
.br
.RI "\fBSROTMG\fP "
.in -1c
.SH "Function/Subroutine Documentation"
.PP 
.SS "subroutine srotmg (real sd1, real sd2, real sx1, real sy1, real, dimension(5) sparam)"

.PP
\fBSROTMG\fP 
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
    CONSTRUCT THE MODIFIED GIVENS TRANSFORMATION MATRIX H WHICH ZEROS
    THE SECOND COMPONENT OF THE 2-VECTOR  (SQRT(SD1)*SX1,SQRT(SD2)*>    SY2)**T\&.
    WITH SPARAM(1)=SFLAG, H HAS ONE OF THE FOLLOWING FORMS\&.\&.

    SFLAG=-1\&.E0     SFLAG=0\&.E0        SFLAG=1\&.E0     SFLAG=-2\&.E0

      (SH11  SH12)    (1\&.E0  SH12)    (SH11  1\&.E0)    (1\&.E0  0\&.E0)
    H=(          )    (          )    (          )    (          )
      (SH21  SH22),   (SH21  1\&.E0),   (-1\&.E0 SH22),   (0\&.E0  1\&.E0)\&.
    LOCATIONS 2-4 OF SPARAM CONTAIN SH11,SH21,SH12, AND SH22
    RESPECTIVELY\&. (VALUES OF 1\&.E0, -1\&.E0, OR 0\&.E0 IMPLIED BY THE
    VALUE OF SPARAM(1) ARE NOT STORED IN SPARAM\&.)

    THE VALUES OF GAMSQ AND RGAMSQ SET IN THE DATA STATEMENT MAY BE
    INEXACT\&.  THIS IS OK AS THEY ARE ONLY USED FOR TESTING THE SIZE
    OF SD1 AND SD2\&.  ALL ACTUAL SCALING OF DATA IS DONE USING GAM\&.
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fISD1\fP 
.PP
.nf
          SD1 is REAL
.fi
.PP
.br
\fISD2\fP 
.PP
.nf
          SD2 is REAL
.fi
.PP
.br
\fISX1\fP 
.PP
.nf
          SX1 is REAL
.fi
.PP
.br
\fISY1\fP 
.PP
.nf
          SY1 is REAL
.fi
.PP
.br
\fISPARAM\fP 
.PP
.nf
          SPARAM is REAL array, dimension (5)
     SPARAM(1)=SFLAG
     SPARAM(2)=SH11
     SPARAM(3)=SH21
     SPARAM(4)=SH12
     SPARAM(5)=SH22
.fi
.PP
 
.RE
.PP
\fBAuthor\fP
.RS 4
Univ\&. of Tennessee 
.PP
Univ\&. of California Berkeley 
.PP
Univ\&. of Colorado Denver 
.PP
NAG Ltd\&. 
.RE
.PP

.PP
Definition at line \fB89\fP of file \fBsrotmg\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.