[PATCH] Correct cpu_flags for CPU_ANY_AVX512BW_FLAGS

Cui, Lili lili.cui@intel.com
Thu Jun 23 08:08:20 GMT 2022



> -----Original Message-----
> From: Jan Beulich <jbeulich@suse.com>
> Sent: Thursday, June 23, 2022 3:30 PM
> To: Cui, Lili <lili.cui@intel.com>
> Cc: binutils@sourceware.org; hjl.tools@gmail.com
> Subject: Re: [PATCH] Correct cpu_flags for CPU_ANY_AVX512BW_FLAGS
> 
> On 23.06.2022 09:14, Cui,Lili wrote:
> > This patch is to correct cpu_flags for CPU_ANY_AVX512BW_FLAGS.
> > Make check-gas is ok.
> > Ok for master?
> >
> > Thanks,
> > Lili.
> >
> > Change it from "CPU_ANY_AVX512_FP16_FLAGS" to "CpuAVX512_FP16"
> 
> You don't say what's wrong with what there is right now. I for one think what
> we have is correct: If one disables BW, _all_ its dependents should be
> disabled as well, which transitively means all dependents of FP16.
> 
Hi Jan,
Agree with that " If one disables BW, _all_ its dependents should be disabled as well ".
I saw the form of "CPU_ANY_AVX512F_FLAGS" today, and to be consistent with it, I thought "CPU_ANY_AVX512_FP16_FLAGS" was wrong at that time. But after reading your email, I found "CPU_ANY_AVX512F_FLAGS" to be the only one that uses cpu_flags instead of CPU_ANY* .

{ "CPU_ANY_AVX512F_FLAGS",
"CpuAVX512F|CpuAVX512CD|CpuAVX512ER|CpuAVX512PF|CpuAVX512DQ|CPU_ANY_AVX512BW_FLAGS|CpuAVX512VL|CpuAVX512IFMA|CpuAVX512VBMI|CpuAVX512_4FMAPS|CpuAVX512_4VNNIW|CpuAVX512_VPOPCNTDQ|CpuAVX512_VBMI2|CpuAVX512_VNNI|CpuAVX512_BITALG|CpuAVX512_BF16|CpuAVX512_VP2INTERSECT" },

Regards,
Lili.

> Jan
> 
> > opcodes/
> >
> > 	* i386-gen.c (cpu_flag_init): Change cpu_flags of
> > 	CPU_ANY_AVX512BW_FLAGS.
> > ---
> >  opcodes/i386-gen.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c index
> > d18a7d2754..5dc224efdb 100644
> > --- a/opcodes/i386-gen.c
> > +++ b/opcodes/i386-gen.c
> > @@ -382,7 +382,7 @@ static initializer cpu_flag_init[] =
> >    { "CPU_ANY_AVX512DQ_FLAGS",
> >      "CpuAVX512DQ" },
> >    { "CPU_ANY_AVX512BW_FLAGS",
> > -    "CpuAVX512BW|CPU_ANY_AVX512_FP16_FLAGS" },
> > +    "CpuAVX512BW|CpuAVX512_FP16" },
> >    { "CPU_ANY_AVX512VL_FLAGS",
> >      "CpuAVX512VL" },
> >    { "CPU_ANY_AVX512IFMA_FLAGS",



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