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Commit 8907b775 authored by arter97's avatar arter97 Committed by Steve Kondik
Browse files

Apply correct, optimized mfpu compiler flag for ARMv7-A Cortex CPUs 

For those ARMv7-A Cortex CPUs that can handle VFPv4 floating point,
We can set "-mfpu=neon-vfpv4" instead of generic "-mfpu=neon"
to gain extra performance improvements.

References :
 - GCC		: https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html
 - Cortex A15	: http://www.arm.com/products/processors/cortex-a/cortex-a15.php
 - Cortex A9	: http://www.arm.com/products/processors/cortex-a/cortex-a9.php
 - Cortex A8	: http://www.arm.com/products/processors/cortex-a/cortex-a8.php
 - Cortex A7	: http://www.arm.com/products/processors/cortex-a/cortex-a7.php
 - Cortex A5	: http://www.arm.com/products/processors/cortex-a/cortex-a5.php



Change-Id: Id8b1a251234014ecf7ffbc1ae14455ed1726e028
Signed-off-by: default avatarPark Ju Hyung <qkrwngud825@gmail.com>
parent 50d46bbc

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

+8 −9
Original line number Diff line number Diff line
@@ -7,24 +7,24 @@ ARCH_ARM_HAVE_VFP_D32 := true 
ARCH_ARM_HAVE_NEON              := true



ifeq ($(TARGET_CPU_VARIANT),$(filter $(TARGET_CPU_VARIANT),cortex-a15 krait))

	arch_variant_cflags := -mcpu=cortex-a15

	arch_variant_cflags := -mcpu=cortex-a15 -mfpu=neon-vfpv4

else

ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a9)

	arch_variant_cflags := -mcpu=cortex-a9

	arch_variant_cflags := -mcpu=cortex-a9 -mfpu=neon

else

ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a8)

	arch_variant_cflags := -mcpu=cortex-a8

	arch_variant_cflags := -mcpu=cortex-a8 -mfpu=neon

else

ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a7)

	arch_variant_cflags := -mcpu=cortex-a7

	arch_variant_cflags := -mcpu=cortex-a7 -mfpu=neon-vfpv4

else

ifeq ($(strip $(TARGET_CPU_VARIANT)),cortex-a5)

	arch_variant_cflags := -mcpu=cortex-a5

	arch_variant_cflags := -mcpu=cortex-a5 -mfpu=neon-vfpv4

else

ifeq ($(strip $(TARGET_CPU_VARIANT)),scorpion)

	arch_variant_cflags := -mcpu=cortex-a8

	arch_variant_cflags := -mcpu=cortex-a8 -mfpu=neon

else

	arch_variant_cflags := -march=armv7-a

	arch_variant_cflags := -march=armv7-a -mfpu=neon

endif

endif

endif
@@ -33,8 +33,7 @@ endif 
endif



arch_variant_cflags += \

    -mfloat-abi=softfp \

    -mfpu=neon

    -mfloat-abi=softfp



arch_variant_ldflags := \

	-Wl,--fix-cortex-a8