On Mon, Dec 6, 2021 at 4:41 AM liuhongt via Gcc-patches
wrote:
>
> When moves between integer and sse registers are cheap.
>
> 2021-12-06 Hongtao Liu
> Uroš Bizjak
> gcc/ChangeLog:
>
> PR target/95740
> * config/i386/i386.c (ix86_preferred_reload_class): Allow
>
Forget --in-reply-to when git send-email.
> I was thinking about:
>
> --cut here--
> @@ -19194,9 +19194,17 @@ ix86_preferred_reload_class (rtx x,
> reg_class_t regclass)
> return NO_REGS;
> }
>
> - /* Prefer SSE regs only, if we can use them for math. */
> + /* Prefer SSE if we can
When moves between integer and sse registers are cheap.
2021-12-06 Hongtao Liu
Uroš Bizjak
gcc/ChangeLog:
PR target/95740
* config/i386/i386.c (ix86_preferred_reload_class): Allow
integer regs when moves between register units are cheap.
*
On Fri, Dec 3, 2021 at 7:19 AM liuhongt wrote:
>
> Hi:
> > Please also consider TARGET_INTER_UNIT_MOVES_TO_VEC and
> > TARGET_INTER_UNIT_MOVES_FROM_VEC.
> Here's updated patch.
>
> Also honor TARGET_INTER_UNIT_MOVES_TO/FROM_VEC and in
> preferred_{,out_}reload_class.
>
> Bootstrapped and
Hi:
> Please also consider TARGET_INTER_UNIT_MOVES_TO_VEC and
> TARGET_INTER_UNIT_MOVES_FROM_VEC.
Here's updated patch.
Also honor TARGET_INTER_UNIT_MOVES_TO/FROM_VEC and in
preferred_{,out_}reload_class.
Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32\ -march=k8,\ -march=k8}.
Ok?
On Thu, Dec 2, 2021 at 9:36 AM Hongtao Liu wrote:
>
> On Thu, Dec 2, 2021 at 4:27 PM liuhongt wrote:
> >
> > The patch helps reload to choose GENENRAL_REGS alternatives for
> > SSE_FLOAT_MODE and enabled optimization like
> >
> > - vmovd %xmm0, -4(%rsp)
> > - movl$1, %eax
> >
On Thu, Dec 2, 2021 at 4:27 PM liuhongt wrote:
>
> The patch helps reload to choose GENENRAL_REGS alternatives for
> SSE_FLOAT_MODE and enabled optimization like
>
> - vmovd %xmm0, -4(%rsp)
> - movl$1, %eax
> - addl-4(%rsp), %eax
> + movd%xmm0, %eax
> +
The patch helps reload to choose GENENRAL_REGS alternatives for
SSE_FLOAT_MODE and enabled optimization like
- vmovd %xmm0, -4(%rsp)
- movl$1, %eax
- addl-4(%rsp), %eax
+ movd%xmm0, %eax
+ addl$1, %eax
Bootstrapped anf regtested on
