1DLAG2S ‐ a DOUBLE PRECISION matrix, SA, to a SINGLE PRECISION ma‐
2trix, A SUBROUTINE DLAG2S( M, N, A, LDA, SA, LDSA, INFO)
3    INTEGER INFO,LDA,LDSA,M,N
4    REAL SA(LDSA,*)
5    DOUBLE PRECISION A(LDA,*) DLAG2S converts a DOUBLE  PRECISION
6matrix, SA, to a SINGLE PRECISION matrix, A.
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8RMAX is the overflow for the SINGLE PRECISION arithmetic
9DLAG2S  checks  that  all  the entries of A are between ‐RMAX and
10RMAX. If not the convertion is aborted and a flag is raised.
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12This is a helper routine so there is no argument checking.
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14M       (input) INTEGER The number of lines of the matrix  A.   M
15>=  0.   N       (input) INTEGER The number of columns of the ma‐
16trix A.  N >= 0.  A       (input) DOUBLE PRECISION array,  dimen‐
17sion  (LDA,N)  On  entry,  the  M‐by‐N coefficient matrix A.  LDA
18(input) INTEGER The leading dimension of the  array  A.   LDA  >=
19max(1,M).  SA      (output) REAL array, dimension (LDSA,N) On ex‐
20it, if INFO=0, the M‐by‐N coefficient matrix SA.  LDSA    (input)
21INTEGER The leading dimension of the array SA.  LDSA >= max(1,M).
22INFO    (output) INTEGER = 0:  successful exit
23> 0:  if INFO = k, the (i,j) entry of the matrix A has overflowed
24when  moving  from  DOUBLE  PRECISION to SINGLE k is given by k =
25(i‐1)*LDA+j
26
27=========
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31
32End of DLAG2S
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