In article <15388 at ut-emx.UUCP> eric at chaos.utexas.edu () writes: >but never a C compiler that can vectorize something like > for(j = 0; j < n; j++) > y[j] = sqrt(x[j]); I would be surprised to find that the ANSI-compatible C compiler for the Cray-2 fails to vectorize such a loop. It vectorizes in analogous cases.