linux_dsm_epyc7002/arch/arm64
Jason A. Donenfeld fb8722735f arm64: support __int128 on gcc 5+
Versions of gcc prior to gcc 5 emitted a __multi3 function call when
dealing with TI types, resulting in failures when trying to link to
libgcc, and more generally, bad performance. However, since gcc 5,
the compiler supports actually emitting fast instructions, which means
we can at long last enable this option and receive the speedups.

The gcc commit that added proper Aarch64 support is:
https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=d1ae7bb994f49316f6f63e6173f2931e837a351d
This commit appears to be part of the gcc 5 release.

There are still a few instructions, __ashlti3 and __ashrti3, which
require libgcc, which is fine. Rather than linking to libgcc, we
simply provide them ourselves, since they're not that complicated.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2017-11-03 15:24:21 +00:00
..
boot ARM: arm64: Devicetree updates for v4.14 2017-09-10 20:54:48 -07:00
configs ARM/arm64: SoC platform updates for v4.14 2017-09-10 20:35:46 -07:00
crypto
include arm64/sve: Add documentation 2017-11-03 15:24:21 +00:00
kernel arm64/sve: Detect SVE and activate runtime support 2017-11-03 15:24:21 +00:00
kvm arm64/sve: KVM: Hide SVE from CPU features exposed to guests 2017-11-03 15:24:20 +00:00
lib arm64: support __int128 on gcc 5+ 2017-11-03 15:24:21 +00:00
mm arm64: explicitly mask all exceptions 2017-11-02 15:55:40 +00:00
net
xen
Kconfig arm64/sve: Kconfig update and conditional compilation support 2017-11-03 15:24:14 +00:00
Kconfig.debug
Kconfig.platforms ARM: arm64: Devicetree updates for v4.14 2017-09-10 20:54:48 -07:00
Makefile arm64: support __int128 on gcc 5+ 2017-11-03 15:24:21 +00:00