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Commit 63e551f0 authored by Ian Rogers's avatar Ian Rogers
Browse files

Move definition of -D__ARM_FEATURE_LPAE=1 cflag to top-level. 

LPAE indicates better instructions can be used when atomicity guarantees are
needed. However, LPAE's presence isn't advertised by clang/GCC. We fake an
ARM feature to advertise its presence on architectures where it is.
Also, add a TODO documenting that cortex-a15 is not the correct CPU variant
for krait.

Change-Id: I02a1248025c32d94eca0bc8a249dc524f1ac9c36
parent c131ec09

core/combo/arch/arm/armv7-a-neon.mk

+7 −0
Original line number Diff line number Diff line
@@ -7,7 +7,14 @@ ARCH_ARM_HAVE_VFP_D32 := true 
ARCH_ARM_HAVE_NEON              := true



ifneq (,$(filter cortex-a15 krait denver,$(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)))

	# TODO: krait is not a cortex-a15, we set the variant to cortex-a15 so that

	#       hardware divide operations are generated. This should be removed and a

	#       krait CPU variant added to GCC/clang.

	arch_variant_cflags := -mcpu=cortex-a15



	# Fake an ARM compiler flag as these processors support LPAE which GCC/clang

	# don't advertise.

	arch_variant_cflags += -D__ARM_FEATURE_LPAE=1

else

ifeq ($(strip $(TARGET_$(combo_2nd_arch_prefix)CPU_VARIANT)),cortex-a8)

	arch_variant_cflags := -mcpu=cortex-a8