First commit

1 files changed, 41 insertions, 0 deletions

diff --git a/2.3-1/src/fortran/blas/izamax.f b/2.3-1/src/fortran/blas/izamax.f
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+++ b/2.3-1/src/fortran/blas/izamax.f
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+      integer function izamax(n,zx,incx)
+c
+c     finds the index of element having max. absolute value.
+c     jack dongarra, 1/15/85.
+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 smax
+      integer i,incx,ix,n
+      double precision dcabs1
+c
+      izamax = 0
+      if( n.lt.1 .or. incx.le.0 )return
+      izamax = 1
+      if(n.eq.1)return
+      if(incx.eq.1)go to 20
+c
+c        code for increment not equal to 1
+c
+      ix = 1
+      smax = dcabs1(zx(1))
+      ix = ix + incx
+      do 10 i = 2,n
+         if(dcabs1(zx(ix)).le.smax) go to 5
+         izamax = i
+         smax = dcabs1(zx(ix))
+    5    ix = ix + incx
+   10 continue
+      return
+c
+c        code for increment equal to 1
+c
+   20 smax = dcabs1(zx(1))
+      do 30 i = 2,n
+         if(dcabs1(zx(i)).le.smax) go to 30
+         izamax = i
+         smax = dcabs1(zx(i))
+   30 continue
+      return
+      end