| Message ID | 20180116100437.GA2818@arm.com |
|---|---|
| State | New |
| Headers | show |
| Series | [WWWDOCS,AArch64,ARM] Update GCC 8 release notes | expand |
Hi Tamar, On 16/01/18 10:04, Tamar Christina wrote: > Hi All, > > This patch updates the GCC 8 release notes for ARM and AArch64. > > Ok for cvs? > > Thanks, > Tamar > > -- <snip> + </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=xgene1</code> or as arguments to the equivalent target xgene1 was added a few releases ago, better to use one of the new additions from the above list. For example -mtune=cortex-r52. With that nit the arm changes look ok to me. Thanks for compiling this! Kyrill
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>
On Tue, Jan 16, 2018 at 02:21:30PM +0000, Tamar Christina wrote: > 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. OK. But you have the same issue in the AArch64 part. James > 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> >
Th 01/16/2018 16:36, James Greenhalgh wrote: > On Tue, Jan 16, 2018 at 02:21:30PM +0000, Tamar Christina wrote: > > 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. > > OK. But you have the same issue in the AArch64 part. Thanks, I've updated the patch, I'll wait for a bit for a doc reviewer if I don't hear anything I'll assume the patch is OK. Thanks, Tamar > > James > > > 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> > > > --
I seem to have forgotten the patch :) The 01/16/2018 16:56, Tamar Christina wrote: > Th 01/16/2018 16:36, James Greenhalgh wrote: > > On Tue, Jan 16, 2018 at 02:21:30PM +0000, Tamar Christina wrote: > > > 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. > > > > OK. But you have the same issue in the AArch64 part. > > Thanks, I've updated the patch, I'll wait for a bit for a doc reviewer if I don't hear anything I'll assume > the patch is OK. > > Thanks, > Tamar > > > > James > > > > > 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> > > > > > > > -- -- 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 16:53:58 -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=cortex-a75</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>
Hi Tamar, On 16/01/18 16:56, Tamar Christina wrote: > Th 01/16/2018 16:36, James Greenhalgh wrote: >> On Tue, Jan 16, 2018 at 02:21:30PM +0000, Tamar Christina wrote: >>> 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. >> OK. But you have the same issue in the AArch64 part. > Thanks, I've updated the patch, I'll wait for a bit for a doc reviewer if I don't hear anything I'll assume > the patch is OK. Gerald has confirmed a few times in the past that port maintainers can approve target-specific changes to the web pages, and there are words to that effect at: https://gcc.gnu.org/svnwrite.html . So I'd recommend you commit your patch once you've got approval for aarch64 and arm. Unless there's some specific part of the patch you'd like the docs maintainer to give you feedback on... Thanks again for working on this. Kyrill > > Thanks, > Tamar >> James >> >>> 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> >>>
Hi Kyrill, > > Hi Tamar, > > On 16/01/18 16:56, Tamar Christina wrote: > > Th 01/16/2018 16:36, James Greenhalgh wrote: > >> On Tue, Jan 16, 2018 at 02:21:30PM +0000, Tamar Christina wrote: > >>> 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. > >> OK. But you have the same issue in the AArch64 part. > > Thanks, I've updated the patch, I'll wait for a bit for a doc reviewer > > if I don't hear anything I'll assume the patch is OK. > > Gerald has confirmed a few times in the past that port maintainers can > approve target-specific changes to the web pages, and there are words to > that effect at: > https://gcc.gnu.org/svnwrite.html . > So I'd recommend you commit your patch once you've got approval for > aarch64 and arm. > Unless there's some specific part of the patch you'd like the docs maintainer > to give you feedback on... Ah, thanks! I'll commit the patch then. > Thanks again for working on this. > Kyrill > > > > > Thanks, > > Tamar > >> James > >> > >>> 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> > >>>
On Tue, 16 Jan 2018, Tamar Christina wrote:
> I seem to have forgotten the patch :)
Ah, one thing I noticed is that you've used the spelling of "Arm"
as opposed to "ARM" and even changed some of the former to the
latter.
Is "Arm" now the new official spelling that we should use consistently?
gcc-8/changes.html still has two references to "ARM".
Gerald
Hi Gerald, Yes the Arm trademark is now "Arm" so that should be used when referring to anything related to the trademark. (see https://www.arm.com/company/policies/trademarks/guidelines-trademarks) I left the ARM there in reference to the port in GCC as that seems to be what we've always called it the changelogs. But I do see how that can be confusing... Kind Regards, 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 11 Jan 2018 15:47:15 -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=xgene1</code> or as arguments to the equivalent target + attributes and pragmas. + </li> </ul> <h3 id="avr">AVR</h3>