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[arch][arm/arm64] Define make variables to enable use of optional simd instructions.

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Support for these instructions can be detected at runtime, but then the unused
code cannot be eliminated at build time.

Change-Id: I51fae84fe4dfb5c9741d732f1f04ac765339175a
This commit is contained in:
Arve Hjønnevåg
2015-09-21 17:22:50 -07:00
parent f12796e834
commit 8b55dedf4c
2 changed files with 16 additions and 0 deletions
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7
arch/arm/rules.mk
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@@ -208,6 +208,13 @@ ifneq ($(ARM_WITHOUT_VFP_NEON),true)
GLOBAL_DEFINES += \
ARM_WITH_VFP=1 \
ARM_WITH_NEON=1
# Enable optional instructions unless platform already disabled them
USE_ARM_V7_NEON ?= true
USE_ARM_V8_AES ?= true
USE_ARM_V8_PMULL ?= true
USE_ARM_V8_SHA1 ?= true
USE_ARM_V8_SHA2 ?= true
endif
HANDLED_CORE := true
endif

9
arch/arm64/rules.mk
View File

@@ -46,6 +46,15 @@ GLOBAL_DEFINES += \
SMP_MAX_CPUS=1
endif
ifeq (false,$(call TOBOOL,$(ARM_WITHOUT_VFP_NEON)))
# Enable optional instructions unless platform already disabled them
USE_ARM_V7_NEON ?= true
USE_ARM_V8_AES ?= true
USE_ARM_V8_PMULL ?= true
USE_ARM_V8_SHA1 ?= true
USE_ARM_V8_SHA2 ?= true
endif
ARCH_OPTFLAGS := -O2
# we have a mmu and want the vmm/pmm