.TH "_lag2_" 3 "Version 3.12.0" "LAPACK" \" -*- nroff -*-
.ad l
.nh
.SH NAME
_lag2_ \- <em>lag2</em>: general matrix, convert double <=> single
.SH SYNOPSIS
.br
.PP
.SS "Functions"

.in +1c
.ti -1c
.RI "subroutine \fBclag2z\fP (m, n, sa, ldsa, a, lda, info)"
.br
.RI "\fBCLAG2Z\fP converts a complex single precision matrix to a complex double precision matrix\&. "
.ti -1c
.RI "subroutine \fBdlag2s\fP (m, n, a, lda, sa, ldsa, info)"
.br
.RI "\fBDLAG2S\fP converts a double precision matrix to a single precision matrix\&. "
.ti -1c
.RI "subroutine \fBslag2d\fP (m, n, sa, ldsa, a, lda, info)"
.br
.RI "\fBSLAG2D\fP converts a single precision matrix to a double precision matrix\&. "
.ti -1c
.RI "subroutine \fBzlag2c\fP (m, n, a, lda, sa, ldsa, info)"
.br
.RI "\fBZLAG2C\fP converts a complex double precision matrix to a complex single precision matrix\&. "
.in -1c
.SH "Detailed Description"
.PP 

.SH "Function Documentation"
.PP 
.SS "subroutine clag2z (integer m, integer n, complex, dimension( ldsa, * ) sa, integer ldsa, complex*16, dimension( lda, * ) a, integer lda, integer info)"

.PP
\fBCLAG2Z\fP converts a complex single precision matrix to a complex double precision matrix\&.  
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 CLAG2Z converts a COMPLEX matrix, SA, to a COMPLEX*16 matrix, A\&.

 Note that while it is possible to overflow while converting
 from double to single, it is not possible to overflow when
 converting from single to double\&.

 This is an auxiliary routine so there is no argument checking\&.
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIM\fP 
.PP
.nf
          M is INTEGER
          The number of lines of the matrix A\&.  M >= 0\&.
.fi
.PP
.br
\fIN\fP 
.PP
.nf
          N is INTEGER
          The number of columns of the matrix A\&.  N >= 0\&.
.fi
.PP
.br
\fISA\fP 
.PP
.nf
          SA is COMPLEX array, dimension (LDSA,N)
          On entry, the M-by-N coefficient matrix SA\&.
.fi
.PP
.br
\fILDSA\fP 
.PP
.nf
          LDSA is INTEGER
          The leading dimension of the array SA\&.  LDSA >= max(1,M)\&.
.fi
.PP
.br
\fIA\fP 
.PP
.nf
          A is COMPLEX*16 array, dimension (LDA,N)
          On exit, the M-by-N coefficient matrix A\&.
.fi
.PP
.br
\fILDA\fP 
.PP
.nf
          LDA is INTEGER
          The leading dimension of the array A\&.  LDA >= max(1,M)\&.
.fi
.PP
.br
\fIINFO\fP 
.PP
.nf
          INFO is INTEGER
          = 0:  successful exit
.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 \fB102\fP of file \fBclag2z\&.f\fP\&.
.SS "subroutine dlag2s (integer m, integer n, double precision, dimension( lda, * ) a, integer lda, real, dimension( ldsa, * ) sa, integer ldsa, integer info)"

.PP
\fBDLAG2S\fP converts a double precision matrix to a single precision matrix\&.  
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 DLAG2S converts a DOUBLE PRECISION matrix, A, to a SINGLE
 PRECISION matrix, SA\&.

 RMAX is the overflow for the SINGLE PRECISION arithmetic
 DLAG2S checks that all the entries of A are between -RMAX and
 RMAX\&. If not the conversion is aborted and a flag is raised\&.

 This is an auxiliary routine so there is no argument checking\&.
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIM\fP 
.PP
.nf
          M is INTEGER
          The number of lines of the matrix A\&.  M >= 0\&.
.fi
.PP
.br
\fIN\fP 
.PP
.nf
          N is INTEGER
          The number of columns of the matrix A\&.  N >= 0\&.
.fi
.PP
.br
\fIA\fP 
.PP
.nf
          A is DOUBLE PRECISION array, dimension (LDA,N)
          On entry, the M-by-N coefficient matrix A\&.
.fi
.PP
.br
\fILDA\fP 
.PP
.nf
          LDA is INTEGER
          The leading dimension of the array A\&.  LDA >= max(1,M)\&.
.fi
.PP
.br
\fISA\fP 
.PP
.nf
          SA is REAL array, dimension (LDSA,N)
          On exit, if INFO=0, the M-by-N coefficient matrix SA; if
          INFO>0, the content of SA is unspecified\&.
.fi
.PP
.br
\fILDSA\fP 
.PP
.nf
          LDSA is INTEGER
          The leading dimension of the array SA\&.  LDSA >= max(1,M)\&.
.fi
.PP
.br
\fIINFO\fP 
.PP
.nf
          INFO is INTEGER
          = 0:  successful exit\&.
          = 1:  an entry of the matrix A is greater than the SINGLE
                PRECISION overflow threshold, in this case, the content
                of SA in exit is unspecified\&.
.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 \fB107\fP of file \fBdlag2s\&.f\fP\&.
.SS "subroutine slag2d (integer m, integer n, real, dimension( ldsa, * ) sa, integer ldsa, double precision, dimension( lda, * ) a, integer lda, integer info)"

.PP
\fBSLAG2D\fP converts a single precision matrix to a double precision matrix\&.  
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 SLAG2D converts a SINGLE PRECISION matrix, SA, to a DOUBLE
 PRECISION matrix, A\&.

 Note that while it is possible to overflow while converting
 from double to single, it is not possible to overflow when
 converting from single to double\&.

 This is an auxiliary routine so there is no argument checking\&.
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIM\fP 
.PP
.nf
          M is INTEGER
          The number of lines of the matrix A\&.  M >= 0\&.
.fi
.PP
.br
\fIN\fP 
.PP
.nf
          N is INTEGER
          The number of columns of the matrix A\&.  N >= 0\&.
.fi
.PP
.br
\fISA\fP 
.PP
.nf
          SA is REAL array, dimension (LDSA,N)
          On entry, the M-by-N coefficient matrix SA\&.
.fi
.PP
.br
\fILDSA\fP 
.PP
.nf
          LDSA is INTEGER
          The leading dimension of the array SA\&.  LDSA >= max(1,M)\&.
.fi
.PP
.br
\fIA\fP 
.PP
.nf
          A is DOUBLE PRECISION array, dimension (LDA,N)
          On exit, the M-by-N coefficient matrix A\&.
.fi
.PP
.br
\fILDA\fP 
.PP
.nf
          LDA is INTEGER
          The leading dimension of the array A\&.  LDA >= max(1,M)\&.
.fi
.PP
.br
\fIINFO\fP 
.PP
.nf
          INFO is INTEGER
          = 0:  successful exit
.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 \fB103\fP of file \fBslag2d\&.f\fP\&.
.SS "subroutine zlag2c (integer m, integer n, complex*16, dimension( lda, * ) a, integer lda, complex, dimension( ldsa, * ) sa, integer ldsa, integer info)"

.PP
\fBZLAG2C\fP converts a complex double precision matrix to a complex single precision matrix\&.  
.PP
\fBPurpose:\fP
.RS 4

.PP
.nf
 ZLAG2C converts a COMPLEX*16 matrix, SA, to a COMPLEX matrix, A\&.

 RMAX is the overflow for the SINGLE PRECISION arithmetic
 ZLAG2C checks that all the entries of A are between -RMAX and
 RMAX\&. If not the conversion is aborted and a flag is raised\&.

 This is an auxiliary routine so there is no argument checking\&.
.fi
.PP
 
.RE
.PP
\fBParameters\fP
.RS 4
\fIM\fP 
.PP
.nf
          M is INTEGER
          The number of lines of the matrix A\&.  M >= 0\&.
.fi
.PP
.br
\fIN\fP 
.PP
.nf
          N is INTEGER
          The number of columns of the matrix A\&.  N >= 0\&.
.fi
.PP
.br
\fIA\fP 
.PP
.nf
          A is COMPLEX*16 array, dimension (LDA,N)
          On entry, the M-by-N coefficient matrix A\&.
.fi
.PP
.br
\fILDA\fP 
.PP
.nf
          LDA is INTEGER
          The leading dimension of the array A\&.  LDA >= max(1,M)\&.
.fi
.PP
.br
\fISA\fP 
.PP
.nf
          SA is COMPLEX array, dimension (LDSA,N)
          On exit, if INFO=0, the M-by-N coefficient matrix SA; if
          INFO>0, the content of SA is unspecified\&.
.fi
.PP
.br
\fILDSA\fP 
.PP
.nf
          LDSA is INTEGER
          The leading dimension of the array SA\&.  LDSA >= max(1,M)\&.
.fi
.PP
.br
\fIINFO\fP 
.PP
.nf
          INFO is INTEGER
          = 0:  successful exit\&.
          = 1:  an entry of the matrix A is greater than the SINGLE
                PRECISION overflow threshold, in this case, the content
                of SA in exit is unspecified\&.
.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 \fB106\fP of file \fBzlag2c\&.f\fP\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for LAPACK from the source code\&.