https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #26 from Uroš Bizjak ---
The testcase now compiles with -O2 -mf16c to:
vpxor %xmm2, %xmm2, %xmm2
vpblendw$1, %xmm0, %xmm2, %xmm0
vpblendw$1, %xmm1, %xmm2, %xmm1
vcvtph2ps
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #25 from CVS Commits ---
The master branch has been updated by Uros Bizjak :
https://gcc.gnu.org/g:7eb961d83b0eda53aeb1cfaacdc367e1952de613
commit r12-5700-g7eb961d83b0eda53aeb1cfaacdc367e1952de613
Author: Uros Bizjak
Date: Wed
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #24 from CVS Commits ---
The master branch has been updated by Uros Bizjak :
https://gcc.gnu.org/g:ca5667e867252db3c8642ee90f55427149cd92b6
commit r12-5584-gca5667e867252db3c8642ee90f55427149cd92b6
Author: Uros Bizjak
Date: Mon
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #23 from CVS Commits ---
The master branch has been updated by hongtao Liu :
https://gcc.gnu.org/g:11d0a2af33910c6d243e7265fb7ea04d2bc89b25
commit r12-5574-g11d0a2af33910c6d243e7265fb7ea04d2bc89b25
Author: liuhongt
Date: Mon
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #22 from CVS Commits ---
The master branch has been updated by hongtao Liu :
https://gcc.gnu.org/g:9519b694afbf9a35c36cf9f14d35d1c0e9e8cacc
commit r12-5573-g9519b694afbf9a35c36cf9f14d35d1c0e9e8cacc
Author: liuhongt
Date: Fri
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #21 from Uroš Bizjak ---
(In reply to Hongtao.liu from comment #20)
> (In reply to Uroš Bizjak from comment #18)
> > (In reply to Uroš Bizjak from comment #17)
> > > (In reply to Hongtao.liu from comment #16)
> > >
> > > >
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #20 from Hongtao.liu ---
(In reply to Uroš Bizjak from comment #18)
> (In reply to Uroš Bizjak from comment #17)
> > (In reply to Hongtao.liu from comment #16)
> >
> > > ix86_expand_vector_set is mainly used by vec_set_optab which
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #19 from Hongtao.liu ---
(In reply to Uroš Bizjak from comment #17)
> (In reply to Hongtao.liu from comment #16)
>
> > ix86_expand_vector_set is mainly used by vec_set_optab which exactly takes
> > target as both input and output,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #18 from Uroš Bizjak ---
(In reply to Uroš Bizjak from comment #17)
> (In reply to Hongtao.liu from comment #16)
>
> > ix86_expand_vector_set is mainly used by vec_set_optab which exactly takes
> > target as both input and output,
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #17 from Uroš Bizjak ---
(In reply to Hongtao.liu from comment #16)
> ix86_expand_vector_set is mainly used by vec_set_optab which exactly takes
> target as both input and output, it seems we can't create a new target for
> that.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #16 from Hongtao.liu ---
(In reply to Uroš Bizjak from comment #15)
> (In reply to Hongtao.liu from comment #14)
> > (In reply to Uroš Bizjak from comment #13)
> > > (In reply to Hongtao.liu from comment #12)
> > > > >
> > > > >
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #15 from Uroš Bizjak ---
(In reply to Hongtao.liu from comment #14)
> (In reply to Uroš Bizjak from comment #13)
> > (In reply to Hongtao.liu from comment #12)
> > > >
> > > > Just noticed that for some reason two VPXORs are
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #14 from Hongtao.liu ---
(In reply to Uroš Bizjak from comment #13)
> (In reply to Hongtao.liu from comment #12)
> > >
> > > Just noticed that for some reason two VPXORs are emitted. One should be
> > > enough for both VPINSRW
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #13 from Uroš Bizjak ---
(In reply to Hongtao.liu from comment #12)
> >
> > Just noticed that for some reason two VPXORs are emitted. One should be
> > enough for both VPINSRW insns.
>
> With new alternative in your attached
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #12 from Hongtao.liu ---
>
> Just noticed that for some reason two VPXORs are emitted. One should be
> enough for both VPINSRW insns.
With new alternative in your attached match(vpblenw one), RA could reuse zero
register, w/o
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #11 from Hongtao.liu ---
> The above dumps show inconsistendy for PEXTRW (it should be VPEXTRW) and
> also open a question, why unpatched gcc prefers memory temp instead of GPR
> temp for PEXTRW/PINSRW.
>
Because RA thought memory
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #10 from Uroš Bizjak ---
(In reply to Uroš Bizjak from comment #7)
> compiles with unpatched gcc -O2 -mf16c to:
>
> vmovss %xmm0, %xmm0, %xmm2 # 27[c=4 l=4] *movhf_internal/3
> pextrw $0, %xmm1, -4(%rsp)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #9 from Hongtao.liu ---
(In reply to Uroš Bizjak from comment #8)
> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> index 68606e57e60..a2ebaa5ac63 100644
> --- a/gcc/config/i386/i386.md
> +++
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #8 from Uroš Bizjak ---
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 68606e57e60..a2ebaa5ac63 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -2528,12 +2528,12 @@
case TYPE_SSELOG:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #7 from Uroš Bizjak ---
The improvement with patch from comment #6:
The testcase:
_Float16 test (_Float16 a, _Float16 b)
{
return a + b;
}
compiles with unpatched gcc -O2 -mf16c to:
vmovss %xmm0, %xmm0, %xmm2 # 27
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #6 from Uroš Bizjak ---
Created attachment 51879
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51879=edit
Improve HI/HFmode scalar insert
The attached patch further improves HFmode -> SFmode conversion. HFmode values
are
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
Andrew Pinski changed:
What|Removed |Added
Status|UNCONFIRMED |RESOLVED
Target Milestone|---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #4 from Hongtao.liu ---
Fixed in GCC12.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #3 from CVS Commits ---
The master branch has been updated by hongtao Liu :
https://gcc.gnu.org/g:90cb088ece8d8cc1019d25629d1585e5b0234179
commit r12-5536-g90cb088ece8d8cc1019d25629d1585e5b0234179
Author: konglin1
Date: Wed Nov
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
Andrew Pinski changed:
What|Removed |Added
Keywords||missed-optimization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #2 from Uroš Bizjak ---
(In reply to Uroš Bizjak from comment #1)
> vxorps %xmm1, %xmm1, %xmm1
> vblendps %xmm1, %xmm1, %xmm0, $1
> vcvtps2ph %xmm0, %xmm1
vmovss %xmm1, %xmm1, %xmm0
instead of vblendps would also do the trick.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102811
--- Comment #1 from Uroš Bizjak ---
Something like (argument and result in %xmm0):
vpxor %xmm1, %xmm1, %xmm1
vpblendw %xmm1, %xmm1, %xmm0, $1
vcvtph2ps %xmm0, %xmm1
instead of __extendhfsf2 and:
vxorps %xmm1, %xmm1, %xmm1
vblendps %xmm1,
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