Original Version

1 files changed, 34 insertions, 0 deletions

diff --git a/src/fortran/blas/dzasum.f b/src/fortran/blas/dzasum.f
new file mode 100644
index 0000000..d21c1ff
--- /dev/null
+++ b/src/fortran/blas/dzasum.f
@@ -0,0 +1,34 @@
+      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