By default Armv7-A tunes for Cortex-A8. This is an ancient core
today and the settings are no longer useful for newer cores. So
switch to Cortex-A53 tuning since it works well across a wide range
of modern cores.
On SPECINT2006 the performance gain is 0.7% compared to Cortex-A8 tuning,
and codesize reduces by 0.2%.
OK for commit?
ChangeLog:
2019-11-15 Wilco Dijkstra <wdijk...@arm.com>
* config/arm/arm-cpus.in (armv7): Set tune to Cortex-A53.
(armv7-a): Likewise.
(armv7ve): Likewise.
---
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in
index
50379a0a10a96c7fd501b401adbd679737b7a322..44e6cc6bdb604eb992d28dd74845edfac9abaad5
100644
--- a/gcc/config/arm/arm-cpus.in
+++ b/gcc/config/arm/arm-cpus.in
@@ -415,7 +415,7 @@ begin arch armv6s-m
end arch armv6s-m
begin arch armv7
- tune for cortex-a8
+ tune for cortex-a53
tune flags CO_PROC
base 7
isa ARMv7
@@ -426,7 +426,7 @@ begin arch armv7
end arch armv7
begin arch armv7-a
- tune for cortex-a8
+ tune for cortex-a53
tune flags CO_PROC
base 7A
profile A
@@ -451,7 +451,7 @@ begin arch armv7-a
end arch armv7-a
begin arch armv7ve
- tune for cortex-a8
+ tune for cortex-a53
tune flags CO_PROC
base 7A
profile A
