Hi Kyrill,
>
> xgene1 was added a few releases ago, better to use one of the new additions
> from the above list.
> For example -mtune=cortex-r52.
Thanks, I have updated the patch. I'll wait for an ok from an AArch64
maintainer and a Docs maintainer.
>
> With that nit the arm changes look ok to me.
> Thanks for compiling this!
> Kyrill
>
Cheers,
Tamar
--
Index: htdocs/gcc-8/changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-8/changes.html,v
retrieving revision 1.26
diff -u -r1.26 changes.html
--- htdocs/gcc-8/changes.html 11 Jan 2018 09:31:53 -0000 1.26
+++ htdocs/gcc-8/changes.html 16 Jan 2018 14:12:57 -0000
@@ -147,7 +147,51 @@
<h3 id="aarch64">AArch64</h3>
<ul>
- <li></li>
+ <li>
+ The Armv8.4-A architecture is now supported. It can be used by
+ specifying the <code>-march=armv8.4-a</code> option.
+ </li>
+ <li>
+ The Dot Product instructions are now supported as an optional extension to the
+ Armv8.2-A architecture and newer and are mandatory on Armv8.4-A. The extension can be used by
+ specifying the <code>+dotprod</code> architecture extension. E.g. <code>-march=armv8.2-a+dotprod</code>.
+ </li>
+ <li>
+ The Armv8-A <code>+crypto</code> extension has now been split into two extensions for finer grained control:
+ <ul>
+ <li><code>+aes</code> which contains the Armv8-A AES crytographic instructions.</li>
+ <li><code>+sha2</code> which contains the Armv8-A SHA2 and SHA1 cryptographic instructions.</li>
+ </ul>
+ Using <code>+crypto<code> will now enable these two extensions.
+ </li>
+ <li>
+ New Armv8.4-A FP16 Floating Point Multiplication Variant instructions have been added. These instructions are
+ mandatory in Armv8.4-A but available as an optional extension to Armv8.2-A and Armv8.3-A. The new extension
+ can be used by specifying the <code>+fp16fml</code> architectural extension on Armv8.2-A and Armv8.3-A. On Armv8.4-A
+ the instructions can be enabled by specifying <code>+fp16</code>.
+ </li>
+ <li>
+ New cryptographic instructions have been added as optional extensions to Armv8.2-A and newer. These instructions can
+ be enabled with:
+ <ul>
+ <li><code>+sha3</code> New SHA3 and SHA2 instructions from Armv8.4-A. This implies <code>+sha2</code>.
+ <li><code>+sm4</code> New SM3 and SM4 instructions from Armv8.4-A.
+ </ul>
+ </li>
+ <li>
+ Support has been added for the following processors
+ (GCC identifiers in parentheses):
+ <ul>
+ <li>Arm Cortex-A75 (<code>cortex-a75</code>).</li>
+ <li>Arm Cortex-A55 (<code>cortex-a55</code>).</li>
+ <li>Arm Cortex-A55/Cortex-A75 DynamIQ big.LITTLE (<code>cortex-a75.cortex-a55</code>).</li>
+ </ul>
+ The GCC identifiers can be used
+ as arguments to the <code>-mcpu</code> or <code>-mtune</code> options,
+ for example: <code>-mcpu=cortex-a75</code> or
+ <code>-mtune=thunderx2t99p1</code> or as arguments to the equivalent target
+ attributes and pragmas.
+ </li>
</ul>
<h3 id="arm">ARM</h3>
@@ -169,14 +213,58 @@
removed in a future release.
</li>
<li>
- The default link behavior for ARMv6 and ARMv7-R targets has been
+ The default link behavior for Armv6 and Armv7-R targets has been
changed to produce BE8 format when generating big-endian images. A new
flag <code>-mbe32</code> can be used to force the linker to produce
legacy BE32 format images. There is no change of behavior for
- ARMv6-m and other ARMv7 or later targets: these already defaulted
+ Armv6-M and other Armv7 or later targets: these already defaulted
to BE8 format. This change brings GCC into alignment with other
compilers for the ARM architecture.
</li>
+ <li>
+ The Armv8-R architecture is now supported. It can be used by specifying the
+ <code>-march=armv8-r</code> option.
+ </li>
+ <li>
+ The Armv8.3-A architecture is now supported. It can be used by
+ specifying the <code>-march=armv8.3-a</code> option.
+ </li>
+ <li>
+ The Armv8.4-A architecture is now supported. It can be used by
+ specifying the <code>-march=armv8.4-a</code> option.
+ </li>
+ <li>
+ The Dot Product instructions are now supported as an optional extension to the
+ Armv8.2-A architecture and newer and are mandatory on Armv8.4-A. The extension can be used by
+ specifying the <code>+dotprod</code> architecture extension. E.g. <code>-march=armv8.2-a+dotprod</code>.
+ </li>
+
+ <li>
+ Support for setting extensions and architectures using the GCC target pragma and attribute has been added.
+ It can be used by specifying <code>#pragma GCC target ("arch=...")</code>, <code>#pragma GCC target ("+extension")</code>,
+ <code>__attribute__((target("arch=...")))</code> or <code>__attribute__((target("+extension")))</code>.
+ </li>
+ <li>
+ New Armv8.4-A FP16 Floating Point Multiplication Variant instructions have been added. These instructions are
+ mandatory in Armv8.4-A but available as an optional extension to Armv8.2-A and Armv8.3-A. The new extension
+ can be used by specifying the <code>+fp16fml</code> architectural extension on Armv8.2-A and Armv8.3-A. On Armv8.4-A
+ the instructions can be enabled by specifying <code>+fp16</code>.
+ </li>
+ <li>
+ Support has been added for the following processors
+ (GCC identifiers in parentheses):
+ <ul>
+ <li>Arm Cortex-A75 (<code>cortex-a75</code>).</li>
+ <li>Arm Cortex-A55 (<code>cortex-a55</code>).</li>
+ <li>Arm Cortex-A55/Cortex-A75 DynamIQ big.LITTLE (<code>cortex-a75.cortex-a55</code>).</li>
+ <li>Arm Cortex-R52 for Armv8-R (<code>cortex-r52</code>).</li>
+ </ul>
+ The GCC identifiers can be used
+ as arguments to the <code>-mcpu</code> or <code>-mtune</code> options,
+ for example: <code>-mcpu=cortex-a75</code> or
+ <code>-mtune=cortex-r52</code> or as arguments to the equivalent target
+ attributes and pragmas.
+ </li>
</ul>
<h3 id="avr">AVR</h3>
