[Buildroot] [PATCH 2/3] arch/Config.in.arm: only enable BR2_ARM_CPU_HAS_NEON for ARMv8 in 32bit mode

[Peter Korsgaard]

A number of packages use BR2_ARM_CPU_HAS_NEON to know if the target handles
aarch32 neon instructions, which is only true for ARMv8 cores when they are
running in 32bit mode.

Notice: These cores do support neon-like instructions using a different
encoding in 64bit mode (it is a required part of ARMv8, similar to the FPU).

Signed-off-by: Peter Korsgaard <peter at korsgaard.com>
---
 arch/Config.in.arm | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/Config.in.arm b/arch/Config.in.arm
index 3c47bd7..6ec6029 100644
--- a/arch/Config.in.arm
+++ b/arch/Config.in.arm
@@ -194,21 +194,21 @@ config BR2_cortex_a17
 config BR2_cortex_a53
 	bool "cortex-A53"
 	select BR2_ARM_CPU_HAS_ARM if !BR2_ARCH_IS_64
-	select BR2_ARM_CPU_HAS_NEON
+	select BR2_ARM_CPU_HAS_NEON if !BR2_ARCH_IS_64
 	select BR2_ARM_CPU_HAS_FP_ARMV8
 	select BR2_ARM_CPU_ARMV8
 	select BR2_ARCH_HAS_MMU_OPTIONAL
 config BR2_cortex_a57
 	bool "cortex-A57"
 	select BR2_ARM_CPU_HAS_ARM if !BR2_ARCH_IS_64
-	select BR2_ARM_CPU_HAS_NEON
+	select BR2_ARM_CPU_HAS_NEON if !BR2_ARCH_IS_64
 	select BR2_ARM_CPU_HAS_FP_ARMV8
 	select BR2_ARM_CPU_ARMV8
 	select BR2_ARCH_HAS_MMU_OPTIONAL
 config BR2_cortex_a72
 	bool "cortex-A72"
 	select BR2_ARM_CPU_HAS_ARM if !BR2_ARCH_IS_64
-	select BR2_ARM_CPU_HAS_NEON
+	select BR2_ARM_CPU_HAS_NEON if !BR2_ARCH_IS_64
 	select BR2_ARM_CPU_HAS_FP_ARMV8
 	select BR2_ARM_CPU_ARMV8
 	select BR2_ARCH_HAS_MMU_OPTIONAL
-- 
2.10.2