------- Comment #4 from hjl dot tools at gmail dot com 2008-10-08 20:55 -------
(In reply to comment #3)
> Newer patch http://gcc.gnu.org/ml/gcc-patches/2008-10/msg00350.html
>
With this patch, I got
.globl foo
.type foo, @function
foo:
xorl %eax, %eax
.p2align 4,,10
.p2align 3
.L2:
pabsw src(%rax), %xmm0
movdqa %xmm0, resdst(%rax)
addq $16, %rax
cmpq $160, %rax
jne .L2
rep
ret
The load is combined into pabsw. The extra load insn and unaligned move
are gone.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37774
