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-rw-r--r--SRC/zgsvj1.f74
1 files changed, 36 insertions, 38 deletions
diff --git a/SRC/zgsvj1.f b/SRC/zgsvj1.f
index b6650cf5..54410cc0 100644
--- a/SRC/zgsvj1.f
+++ b/SRC/zgsvj1.f
@@ -241,6 +241,7 @@
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
* November 2015
*
+ IMPLICIT NONE
* .. Scalar Arguments ..
DOUBLE PRECISION EPS, SFMIN, TOL
INTEGER INFO, LDA, LDV, LWORK, M, MV, N, N1, NSWEEP
@@ -255,7 +256,7 @@
*
* .. Local Parameters ..
DOUBLE PRECISION ZERO, HALF, ONE
- PARAMETER ( ZERO = 0.0E0, HALF = 0.5E0, ONE = 1.0E0)
+ PARAMETER ( ZERO = 0.0D0, HALF = 0.5D0, ONE = 1.0D0)
* ..
* .. Local Scalars ..
COMPLEX*16 AAPQ, OMPQ
@@ -268,22 +269,20 @@
$ p, PSKIPPED, q, ROWSKIP, SWBAND
LOGICAL APPLV, ROTOK, RSVEC
* ..
-* .. Local Arrays ..
- DOUBLE PRECISION FASTR( 5 )
* ..
* .. Intrinsic Functions ..
- INTRINSIC ABS, AMAX1, DBLE, MIN0, SIGN, SQRT
+ INTRINSIC ABS, DCONJG, DMAX1, DFLOAT, MIN0, DSIGN, DSQRT
* ..
* .. External Functions ..
DOUBLE PRECISION DZNRM2
COMPLEX*16 ZDOTC
- INTEGER IZAMAX
+ INTEGER IDAMAX
LOGICAL LSAME
- EXTERNAL IZAMAX, LSAME, ZDOTC, DZNRM2
+ EXTERNAL IDAMAX, LSAME, ZDOTC, DZNRM2
* ..
* .. External Subroutines ..
* .. from BLAS
- EXTERNAL ZCOPY, ZDROT, ZDSCAL, ZSWAP
+ EXTERNAL ZCOPY, ZROT, ZSWAP
* .. from LAPACK
EXTERNAL ZLASCL, ZLASSQ, XERBLA
* ..
@@ -331,14 +330,14 @@
END IF
RSVEC = RSVEC .OR. APPLV
- ROOTEPS = SQRT( EPS )
- ROOTSFMIN = SQRT( SFMIN )
+ ROOTEPS = DSQRT( EPS )
+ ROOTSFMIN = DSQRT( SFMIN )
SMALL = SFMIN / EPS
BIG = ONE / SFMIN
ROOTBIG = ONE / ROOTSFMIN
- LARGE = BIG / SQRT( DBLE( M*N ) )
+ LARGE = BIG / DSQRT( DFLOAT( M*N ) )
BIGTHETA = ONE / ROOTEPS
- ROOTTOL = SQRT( TOL )
+ ROOTTOL = DSQRT( TOL )
*
* .. Initialize the right singular vector matrix ..
*
@@ -346,7 +345,6 @@
*
EMPTSW = N1*( N-N1 )
NOTROT = 0
- FASTR( 1 ) = ZERO
*
* .. Row-cyclic pivot strategy with de Rijk's pivoting ..
*
@@ -469,7 +467,7 @@
OMPQ = AAPQ / ABS(AAPQ)
* AAPQ = AAPQ * DCONJG(CWORK(p))*CWORK(q)
AAPQ1 = -ABS(AAPQ)
- MXAAPQ = AMAX1( MXAAPQ, -AAPQ1 )
+ MXAAPQ = DMAX1( MXAAPQ, -AAPQ1 )
*
* TO rotate or NOT to rotate, THAT is the question ...
*
@@ -489,37 +487,37 @@
IF( ABS( THETA ).GT.BIGTHETA ) THEN
T = HALF / THETA
CS = ONE
- CALL CROT( M, A(1,p), 1, A(1,q), 1,
+ CALL ZROT( M, A(1,p), 1, A(1,q), 1,
$ CS, DCONJG(OMPQ)*T )
IF( RSVEC ) THEN
- CALL CROT( MVL, V(1,p), 1,
+ CALL ZROT( MVL, V(1,p), 1,
$ V(1,q), 1, CS, DCONJG(OMPQ)*T )
END IF
- SVA( q ) = AAQQ*SQRT( AMAX1( ZERO,
+ SVA( q ) = AAQQ*DSQRT( DMAX1( ZERO,
$ ONE+T*APOAQ*AAPQ1 ) )
- AAPP = AAPP*SQRT( AMAX1( ZERO,
+ AAPP = AAPP*DSQRT( DMAX1( ZERO,
$ ONE-T*AQOAP*AAPQ1 ) )
- MXSINJ = AMAX1( MXSINJ, ABS( T ) )
+ MXSINJ = DMAX1( MXSINJ, ABS( T ) )
ELSE
*
* .. choose correct signum for THETA and rotate
*
- THSIGN = -SIGN( ONE, AAPQ1 )
+ THSIGN = -DSIGN( ONE, AAPQ1 )
IF( AAQQ.GT.AAPP0 )THSIGN = -THSIGN
T = ONE / ( THETA+THSIGN*
- $ SQRT( ONE+THETA*THETA ) )
- CS = SQRT( ONE / ( ONE+T*T ) )
+ $ DSQRT( ONE+THETA*THETA ) )
+ CS = DSQRT( ONE / ( ONE+T*T ) )
SN = T*CS
- MXSINJ = AMAX1( MXSINJ, ABS( SN ) )
- SVA( q ) = AAQQ*SQRT( AMAX1( ZERO,
+ MXSINJ = DMAX1( MXSINJ, ABS( SN ) )
+ SVA( q ) = AAQQ*DSQRT( DMAX1( ZERO,
$ ONE+T*APOAQ*AAPQ1 ) )
- AAPP = AAPP*SQRT( AMAX1( ZERO,
+ AAPP = AAPP*DSQRT( DMAX1( ZERO,
$ ONE-T*AQOAP*AAPQ1 ) )
*
- CALL CROT( M, A(1,p), 1, A(1,q), 1,
+ CALL ZROT( M, A(1,p), 1, A(1,q), 1,
$ CS, DCONJG(OMPQ)*SN )
IF( RSVEC ) THEN
- CALL CROT( MVL, V(1,p), 1,
+ CALL ZROT( MVL, V(1,p), 1,
$ V(1,q), 1, CS, DCONJG(OMPQ)*SN )
END IF
END IF
@@ -536,14 +534,14 @@
CALL ZLASCL( 'G', 0, 0, AAQQ, ONE,
$ M, 1, A( 1, q ), LDA,
$ IERR )
- CALL CAXPY( M, -AAPQ, WORK,
+ CALL ZAXPY( M, -AAPQ, WORK,
$ 1, A( 1, q ), 1 )
CALL ZLASCL( 'G', 0, 0, ONE, AAQQ,
$ M, 1, A( 1, q ), LDA,
$ IERR )
- SVA( q ) = AAQQ*SQRT( AMAX1( ZERO,
+ SVA( q ) = AAQQ*DSQRT( DMAX1( ZERO,
$ ONE-AAPQ1*AAPQ1 ) )
- MXSINJ = AMAX1( MXSINJ, SFMIN )
+ MXSINJ = DMAX1( MXSINJ, SFMIN )
ELSE
CALL ZCOPY( M, A( 1, q ), 1,
$ WORK, 1 )
@@ -553,14 +551,14 @@
CALL ZLASCL( 'G', 0, 0, AAPP, ONE,
$ M, 1, A( 1, p ), LDA,
$ IERR )
- CALL CAXPY( M, -DCONJG(AAPQ),
+ CALL ZAXPY( M, -DCONJG(AAPQ),
$ WORK, 1, A( 1, p ), 1 )
CALL ZLASCL( 'G', 0, 0, ONE, AAPP,
$ M, 1, A( 1, p ), LDA,
$ IERR )
- SVA( p ) = AAPP*SQRT( AMAX1( ZERO,
+ SVA( p ) = AAPP*DSQRT( DMAX1( ZERO,
$ ONE-AAPQ1*AAPQ1 ) )
- MXSINJ = AMAX1( MXSINJ, SFMIN )
+ MXSINJ = DMAX1( MXSINJ, SFMIN )
END IF
END IF
* END IF ROTOK THEN ... ELSE
@@ -577,7 +575,7 @@
AAQQ = ONE
CALL ZLASSQ( M, A( 1, q ), 1, T,
$ AAQQ )
- SVA( q ) = T*SQRT( AAQQ )
+ SVA( q ) = T*DSQRT( AAQQ )
END IF
END IF
IF( ( AAPP / AAPP0 )**2.LE.ROOTEPS ) THEN
@@ -589,7 +587,7 @@
AAPP = ONE
CALL ZLASSQ( M, A( 1, p ), 1, T,
$ AAPP )
- AAPP = T*SQRT( AAPP )
+ AAPP = T*DSQRT( AAPP )
END IF
SVA( p ) = AAPP
END IF
@@ -654,7 +652,7 @@
T = ZERO
AAPP = ONE
CALL ZLASSQ( M, A( 1, N ), 1, T, AAPP )
- SVA( N ) = T*SQRT( AAPP )
+ SVA( N ) = T*DSQRT( AAPP )
END IF
*
* Additional steering devices
@@ -662,8 +660,8 @@
IF( ( i.LT.SWBAND ) .AND. ( ( MXAAPQ.LE.ROOTTOL ) .OR.
$ ( ISWROT.LE.N ) ) )SWBAND = i
*
- IF( ( i.GT.SWBAND+1 ) .AND. ( MXAAPQ.LT.SQRT( DBLE( N ) )*
- $ TOL ) .AND. ( DBLE( N )*MXAAPQ*MXSINJ.LT.TOL ) ) THEN
+ IF( ( i.GT.SWBAND+1 ) .AND. ( MXAAPQ.LT.DSQRT( DFLOAT( N ) )*
+ $ TOL ) .AND. ( DFLOAT( N )*MXAAPQ*MXSINJ.LT.TOL ) ) THEN
GO TO 1994
END IF
*
@@ -686,7 +684,7 @@
*
* Sort the vector SVA() of column norms.
DO 5991 p = 1, N - 1
- q = IZAMAX( N-p+1, SVA( p ), 1 ) + p - 1
+ q = IDAMAX( N-p+1, SVA( p ), 1 ) + p - 1
IF( p.NE.q ) THEN
TEMP1 = SVA( p )
SVA( p ) = SVA( q )
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-29 10:39:46 +0000