More i386 string ops changes

[Richard Henderson]

On Thu, Jan 13, 2000 at 02:09:36PM +0100, Jan Hubicka wrote:
> 	* i386.md (memstr): Use do not use rep stosb for counts divisible by 4
> 	when optimize_size.

  "Use do not use" ?

> !   /* Use formula that gives nonzero result ifif one of the bytes is zero.
> !      This saves three branches inside loop and many cycles.  */

  "This formula yields a non-zero result iff"

> !       emit_insn (gen_cmpsi_1 (countreg, countreg));

Are you quite sure this won't get optimized away on you?




r~