Mercurial > octave-nkf
view libcruft/blas/dzasum.f @ 4822:d0aa1a59b73b ss-2-1-56
[project @ 2004-03-05 19:15:30 by jwe]
author | jwe |
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date | Fri, 05 Mar 2004 19:15:30 +0000 |
parents | bac14003d9bb |
children |
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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