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REAL FUNCTION CLA_RPVGRW( N, NCOLS, A, LDA, AF, LDAF )
*
* -- LAPACK routine (version 3.2) --
* -- Contributed by James Demmel, Deaglan Halligan, Yozo Hida and --
* -- Jason Riedy of Univ. of California Berkeley. --
* -- November 2008 --
*
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley and NAG Ltd. --
*
IMPLICIT NONE
* ..
* .. Scalar Arguments ..
INTEGER N, NCOLS, LDA, LDAF
* ..
* .. Array Arguments ..
COMPLEX A( LDA, * ), AF( LDAF, * )
* ..
*
* Purpose
* =======
*
* CLA_RPVGRW computes ... .
*
* Arguments
* =========
*
* =====================================================================
*
* .. Local Scalars ..
INTEGER I, J
REAL AMAX, UMAX, RPVGRW
COMPLEX ZDUM
* ..
* .. Intrinsic Functions ..
INTRINSIC MAX, MIN, ABS, REAL, AIMAG
* ..
* .. Statement Functions ..
REAL CABS1
* ..
* .. Statement Function Definitions ..
CABS1( ZDUM ) = ABS( REAL( ZDUM ) ) + ABS( AIMAG( ZDUM ) )
* ..
* .. Executable Statements ..
*
RPVGRW = 1.0
*
DO J = 1, NCOLS
AMAX = 0.0
UMAX = 0.0
DO I = 1, N
AMAX = MAX( CABS1( A( I, J ) ), AMAX )
END DO
DO I = 1, J
UMAX = MAX( CABS1( AF( I, J ) ), UMAX )
END DO
IF ( UMAX /= 0.0 ) THEN
RPVGRW = MIN( AMAX / UMAX, RPVGRW )
END IF
END DO
CLA_RPVGRW = RPVGRW
END FUNCTION
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