116 DOUBLE PRECISION FUNCTION zlansp( NORM, UPLO, N, AP, WORK )
128 DOUBLE PRECISION work( * )
135 DOUBLE PRECISION one, zero
136 parameter( one = 1.0d+0, zero = 0.0d+0 )
140 DOUBLE PRECISION absa, scale, sum,
value
150 INTRINSIC abs, dble, dimag, sqrt
156 ELSE IF(
lsame( norm,
'M' ) )
THEN
161 IF(
lsame( uplo,
'U' ) )
THEN
164 DO 10 i = k, k +
j - 1
173 DO 30 i = k, k + n -
j
180 ELSE IF( (
lsame( norm,
'I' ) ) .OR. (
lsame( norm,
'O' ) ) .OR.
181 $ ( norm.EQ.
'1' ) )
THEN
187 IF(
lsame( uplo,
'U' ) )
THEN
191 absa = abs( ap( k ) )
193 work( i ) = work( i ) + absa
196 work(
j ) = sum + abs( ap( k ) )
208 sum = work(
j ) + abs( ap( k ) )
211 absa = abs( ap( k ) )
213 work( i ) = work( i ) + absa
219 ELSE IF( (
lsame( norm,
'F' ) ) .OR. (
lsame( norm,
'E' ) ) )
THEN
226 IF(
lsame( uplo,
'U' ) )
THEN
228 CALL
zlassq(
j-1, ap( k ), 1, scale, sum )
233 CALL
zlassq( n-
j, ap( k ), 1, scale, sum )
240 IF( dble( ap( k ) ).NE.zero )
THEN
241 absa = abs( dble( ap( k ) ) )
242 IF( scale.LT.absa )
THEN
243 sum = one + sum*( scale / absa )**2
246 sum = sum + ( absa / scale )**2
249 IF( dimag( ap( k ) ).NE.zero )
THEN
250 absa = abs( dimag( ap( k ) ) )
251 IF( scale.LT.absa )
THEN
252 sum = one + sum*( scale / absa )**2
255 sum = sum + ( absa / scale )**2
258 IF(
lsame( uplo,
'U' ) )
THEN
264 value = scale*sqrt( sum )
LOGICAL function lsame(CA, CB)
LSAME
subroutine zlassq(N, X, INCX, SCALE, SUMSQ)
ZLASSQ updates a sum of squares represented in scaled form.
input scalars passed by value
DOUBLE PRECISION function zlansp(NORM, UPLO, N, AP, WORK)
ZLANSP returns the value of the 1-norm, or the Frobenius norm, or the infinity norm, or the element of largest absolute value of a symmetric matrix supplied in packed form.
LOGICAL function disnan(DIN)
DISNAN tests input for NaN.
set ue cd $ADTTMP cat<< EOF > tmp f Program LinearEquations Implicit none Real j