On Wed, Jan 23, 2019 at 04:43:02AM -0600, Tamar Christina wrote: > Hi All, > > This patch adds the documentation for Stack clash protection and Armv8.3-a > support to > changes.html for GCC 9. > I have validated the html using the W3C validator. > > Ok for cvs?
Almost OK by me. > > Thanks, > Tamar > > -- > Index: htdocs/gcc-9/changes.html > =================================================================== > RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-9/changes.html,v > retrieving revision 1.35 > diff -u -r1.35 changes.html > --- htdocs/gcc-9/changes.html 15 Jan 2019 13:17:49 -0000 1.35 > +++ htdocs/gcc-9/changes.html 22 Jan 2019 11:16:07 -0000 > @@ -214,6 +214,27 @@ > <code>-mtune=cortex-a76.cortex-a55</code> or as arguments to the > equivalent target > attributes and pragmas. > </li> > + <li> > + The AArch64 port now has support for stack clash protection using the > + <code>-fstack-clash-protection</code> option. The protection also works > for > + SVE systems. The probing interval/guard size can be set by using I would drop this "also works" part. The option is just available for AArch64, SVE is a part of AArch64. Otherwise OK, though I don't remember if that is for me to OK, or someone else. Thanks, James > + <code>--param stack-clash-protection-guard-size=12|16</code>. > + The value of this parameter must be in bytes represented as a power of > two. > + The only two supported values for this parameter are 12 and 16 being > + 4Kb (2^12) and 64Kb (2^16) respectively. > + > + The default value is 16 (64Kb) and can be changed at configure > + time using the flag > <code>--with-stack-clash-protection-guard-size=12|16</code>. > + </li> > + <li> > + The Armv8.3-A complex number instructions are now supported via > intrinsics > + when the option <code>-march=armv8.3-a</code> or equivalent is specified. > + For the half-precision floating-point variants of these instructions use > the > + architecture extension flag <code>+fp16</code>, e.g. > + <code>-march=armv8.3-a+fp16</code>. > + > + The intrinsics are defined by the ACLE specification. > + </li> > </ul> > > <h3 id="arc">ARC</h3> > @@ -250,6 +271,15 @@ > (which have no known implementations) has been removed. > Note that Armv5T, Armv5TE and Armv5TEJ architectures remain supported. > </li> > + <li> > + The Armv8.3-A complex number instructions are now supported via > intrinsics > + when the option <code>-march=armv8.3-a</code> or equivalent is specified. > + For the half-precision floating-point variants of these instructions use > the > + architecture extension flag <code>+fp16</code>, e.g. > + <code>-march=armv8.3-a+fp16</code>. > + > + The intrinsics are defined by the ACLE specification. > + </li> > </ul> > > <!-- <h3 id="avr">AVR</h3> --> >
