r256537 - in /trunk/gcc: ChangeLog config/arm/a...

[ktkachov@gcc.gnu.org]

Author: ktkachov
Date: Thu Jan 11 15:18:04 2018
New Revision: 256537

URL: https://gcc.gnu.org/viewcvs?rev=256537&root=gcc&view=rev
Log:
[arm][1/3] Add -march=armv8.4-a option

This patch adds support for the Armv8.4-A architecture [1]
in the arm backend. This is done through the new
-march=armv8.4-a option.

With this patch armv8.4-a is recognised as an argument
and supports the extensions: simd, fp16, crypto, nocrypto,
nofp with the familiar meaning of these options.
Worth noting that there is no dotprod option like in
armv8.2-a and armv8.3-a because Dot Product support is
mandatory in Armv8.4-A when simd is available, so when using
+simd (of fp16 which enables +simd), the +dotprod is implied.

The various multilib selection makefile fragments are updated
too and the mutlilib.exp test gets a few armv8.4-a combination
tests.

Bootstrapped and tested on arm-none-linux-gnueabihf.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm-cpus.in
    trunk/gcc/config/arm/arm-tables.opt
    trunk/gcc/config/arm/t-aprofile
    trunk/gcc/config/arm/t-arm-elf
    trunk/gcc/config/arm/t-multilib
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/arm/multilib.exp