This volatile_spec tells the compiler it does not touch any of the
registers so ira and reload can insert its instructions in either
place. Lying to reload is bad news.
Sent from my iPhone
On May 29, 2010, at 8:26 AM, "H.J. Lu" wrote:
On Fri, May 28, 2010 at 9:08 PM, Vladimir N. Makarov
On Fri, May 28, 2010 at 9:08 PM, Vladimir N. Makarov
wrote:
> On 05/28/2010 12:38 PM, H.J. Lu wrote:
>>
>> Hi,
>>
>> I want to generate vzeroupper when I know upper 128bits aren't used. I
>> can't find
>> a way to mark an pattern which zeros upper 128bits. So I added
>>
>> ;; Clear the upper 128bi
On 05/28/2010 12:38 PM, H.J. Lu wrote:
Hi,
I want to generate vzeroupper when I know upper 128bits aren't used. I
can't find
a way to mark an pattern which zeros upper 128bits. So I added
;; Clear the upper 128bits of AVX registers, equivalent to a NOP.
;; This should be used only when the uppe
On Fri, May 28, 2010 at 3:03 PM, Jeff Law wrote:
> On 05/28/10 10:38, H.J. Lu wrote:
>>
>> Hi,
>>
>> I want to generate vzeroupper when I know upper 128bits aren't used. I
>> can't find
>> a way to mark an pattern which zeros upper 128bits. So I added
>>
>
> Presumably you can't use a zero_extract
On 05/28/10 10:38, H.J. Lu wrote:
Hi,
I want to generate vzeroupper when I know upper 128bits aren't used. I
can't find
a way to mark an pattern which zeros upper 128bits. So I added
Presumably you can't use a zero_extract?
[ ... ]
before IRA,
(insn 2 4 3 2 x.i:9 (set (reg/v:V8SF 59 [ y
Hi,
I want to generate vzeroupper when I know upper 128bits aren't used. I
can't find
a way to mark an pattern which zeros upper 128bits. So I added
;; Clear the upper 128bits of AVX registers, equivalent to a NOP.
;; This should be used only when the upper 128bits are unused.
(define_insn "avx_v
