Go backward to Loop Distribution Go up to Top Go forward to Conditional Vector Merge

Vectorization of Conditionals

Merge different vectors.

DO I = 1, N
  IF (A(I).GT.0)
    A(I) = A(I)+B(I)
  ELSE
    A(I) = A(I)-B(I)
  ENDIF
ENDDO

|

V

M(1:N) = A(1:N).GT.0
A(1:N) = CMERGE(M, A+B, A-B)

Both branches are computed for all elements!