------- Comment #2 from rguenth at gcc dot gnu dot org 2006-10-16 10:16 -------
Differences mainline vs. 4.1.x are
@@ -8,14 +8,19 @@
test:
pushl %ebp
movl %esp, %ebp
- subl $40, %esp
- movss 12(%ebp), %xmm1
- movaps %xmm1, %xmm2
- unpcklps %xmm1, %xmm2
- movaps %xmm2, %xmm0
+ subl $56, %esp
+ movd 12(%ebp), %mm1
+ movq %mm1, %mm2
+ punpckldq %mm2, %mm2
+ movd %mm1, -4(%ebp)
+ movss -4(%ebp), %xmm1
xorps %xmm2, %xmm2
unpcklps %xmm2, %xmm1
- movlhps %xmm1, %xmm0
+ movaps %xmm1, %xmm0
+ movq %mm2, -16(%ebp)
+ movq2dq %mm2, %xmm1
+ movlhps %xmm0, %xmm1
+ movaps %xmm1, %xmm0
addps mm, %xmm0
movaps %xmm0, mm
movl 8(%ebp), %eax
i.e. 4.1.x uses MMX code here. This is PR28825 actually, I'll do a backport.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |28825
AssignedTo|unassigned at gcc dot gnu |rguenth at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2006-09-06 14:23:10 |2006-10-16 10:16:09
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28960
