Mercurial > octave-nkf
view libcruft/blas/dzasum.f @ 7961:a5d1e27ee1f4 ss-3-1-51
3.1.51 snapshot
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 22 Jul 2008 11:40:48 -0400 |
parents | bac14003d9bb |
children |
line wrap: on
line source
double precision function dzasum(n,zx,incx) c c takes the sum of the absolute values. c jack dongarra, 3/11/78. c modified 3/93 to return if incx .le. 0. c modified 12/3/93, array(1) declarations changed to array(*) c double complex zx(*) double precision stemp,dcabs1 integer i,incx,ix,n c dzasum = 0.0d0 stemp = 0.0d0 if( n.le.0 .or. incx.le.0 )return if(incx.eq.1)go to 20 c c code for increment not equal to 1 c ix = 1 do 10 i = 1,n stemp = stemp + dcabs1(zx(ix)) ix = ix + incx 10 continue dzasum = stemp return c c code for increment equal to 1 c 20 do 30 i = 1,n stemp = stemp + dcabs1(zx(i)) 30 continue dzasum = stemp return end