[wwwdocs] Add znver5 to GCC 14 changes

[wwwdocs] Add znver5 to GCC 14 changes

[Martin Jambor]

Hello,

based on input from AMD, I'd like to commit the following to the wwwdocs
repo to point out new support for Zen 5 based AMD CPUs in GCC 14?

Is it OK?  Any suggestions, comments or questions?

Thanks,

Martin



diff --git a/htdocs/gcc-14/changes.html b/htdocs/gcc-14/changes.html
index 8dfbf7dc..d250340b 100644
--- a/htdocs/gcc-14/changes.html
+++ b/htdocs/gcc-14/changes.html
@@ -954,6 +954,11 @@ __asm (".global __flmap_lock"  "\n\t"
     <code>-fsanitize=hwaddress</code> will enable <code>-mlam=u57</code>
     by default.
   </li>
+  <li> GCC now supports AMD CPUs based on the znver5 core via
+    <code>-march=znver5</code>.  Based on ISA extensions enabled on
+    a znver4 core, the switch further enables the AVXVNNI, MOVDIRI,
+    MOVDIR64B, AVX512VP2INTERSECT, and PREFETCHI ISA extensions.
+  </li>
 </ul>
 
 <h3 id="mcore">MCore</h3>

Re: [wwwdocs] Add znver5 to GCC 14 changes

[Gerald Pfeifer]

Hi Martin,

On Thu, 2 May 2024, Martin Jambor wrote:
> +  <li> GCC now supports AMD CPUs based on the znver5 core via
> +    <code>-march=znver5</code>.  Based on ISA extensions enabled on
> +    a znver4 core, the switch further enables the AVXVNNI, MOVDIRI,
> +    MOVDIR64B, AVX512VP2INTERSECT, and PREFETCHI ISA extensions.

just two small suggestions: We usually sort extensions alphabetically,
so  AVX512VP2INTERSECT, AVXVNNI, MOVDIR64B, MOVDIRI, and PREFETCHI. If 
there is a specific reason to do otherwise, that's okay of course.

And I might write "In addition to the ISA extensions enabled on a znver4 
core, this switch..." to avoid the repetition of "based on" (and make it a 
bit more clear even that it is a full superset, not just 'loosely' based".

Gerald

Re: [wwwdocs] Add znver5 to GCC 14 changes

[Martin Jambor]

Hi Gerald,

On Fri, May 03 2024, Gerald Pfeifer wrote:
> Hi Martin,
>
> On Thu, 2 May 2024, Martin Jambor wrote:
>> +  <li> GCC now supports AMD CPUs based on the znver5 core via
>> +    <code>-march=znver5</code>.  Based on ISA extensions enabled on
>> +    a znver4 core, the switch further enables the AVXVNNI, MOVDIRI,
>> +    MOVDIR64B, AVX512VP2INTERSECT, and PREFETCHI ISA extensions.
>
> just two small suggestions: We usually sort extensions alphabetically,
> so  AVX512VP2INTERSECT, AVXVNNI, MOVDIR64B, MOVDIRI, and PREFETCHI. If 
> there is a specific reason to do otherwise, that's okay of course.
>
> And I might write "In addition to the ISA extensions enabled on a znver4 
> core, this switch..." to avoid the repetition of "based on" (and make it a 
> bit more clear even that it is a full superset, not just 'loosely' based".
>

Thanks for the suggestions, I'll go ahead and commit the following then.

Martin


diff --git a/htdocs/gcc-14/changes.html b/htdocs/gcc-14/changes.html
index 8dfbf7dc..46a0266d 100644
--- a/htdocs/gcc-14/changes.html
+++ b/htdocs/gcc-14/changes.html
@@ -954,6 +954,12 @@ __asm (".global __flmap_lock"  "\n\t"
     <code>-fsanitize=hwaddress</code> will enable <code>-mlam=u57</code>
     by default.
   </li>
+  <li> GCC now supports AMD CPUs based on the znver5 core via
+    <code>-march=znver5</code>.  In addition to the ISA extensions
+    enabled on a znver4 core, this switch further enables the
+    AVX512VP2INTERSECT, AVXVNNI, MOVDIR64B, MOVDIRI, and PREFETCHI ISA
+    extensions.
+  </li>
 </ul>
 
 <h3 id="mcore">MCore</h3>