Previous: , Up: GNU Fortran Compiler Directives   [Contents][Index]


7.2.2 UNROLL directive

The syntax of the directive is

!GCC$ unroll N

You can use this directive to control how many times a loop should be unrolled. It must be placed immediately before a DO loop and applies only to the loop that follows. N is an integer constant specifying the unrolling factor. The values of 0 and 1 block any unrolling of the loop.