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Add NEON support to the NDK build system + docs

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You can now define LOCAL_ARM_NEON to 'true' in your Android.mk
to indicate that a whole module must be compiled with NEON support.

Alternatively, use the .neon suffix when listing source files in
LOCAL_SRC_FILES to indicate that they should be built with NEON
support. E.g.:

  LOCAL_SRC_FILES := foo.c.neon bar.c zoo.c.arm.neon

Note that .arm.neon is supported, but .neon.arm is NOT.

Also added documentation in docs/CPU-ARM-NEON.TXT

Another patch will provide one or more sample applications
to demonstrate all of this.
This commit is contained in:
David 'Digit' Turner
2010-02-09 12:25:56 -08:00
parent 3b712fda34
commit da4b8312a1
9 changed files with 440 additions and 41 deletions
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28
ndk/build/toolchains/arm-eabi-4.2.1/setup.mk
View File

@@ -60,6 +60,34 @@ TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \
-marm \
-fno-omit-frame-pointer
# This function will be called to determine the target CFLAGS used to build
# a C or Assembler source file, based on its tags.
#
# NOTE: ARM Advanced SIMD (a.k.a. NEON) is not supported with this toolchain.
#
TARGET-process-src-files-tags = \
$(eval __arm_sources := $(call get-src-files-with-tag,arm)) \
$(eval __thumb_sources := $(call get-src-files-without-tag,arm)) \
$(eval __debug_sources := $(call get-src-files-with-tag,debug)) \
$(eval __release_sources := $(call get-src-files-without-tag,debug)) \
$(call set-src-files-target-cflags, \
$(call set_intersection,$(__arm_sources),$(__debug_sources)), \
$(TARGET_arm_debug_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__arm_sources),$(__release_sources)),\
$(TARGET_arm_release_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__arm_sources),$(__debug_sources)),\
$(TARGET_arm_debug_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__thumb_sources),$(__release_sources)),\
$(TARGET_thumb_release_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__thumb_sources),$(__debug_sources)),\
$(TARGET_thumb_debug_CFLAGS)) \
$(call set-src-files-text,$(__arm_sources),arm$(space)$(space)) \
$(call set-src-files-text,$(__thumb_sources),thumb)
TARGET_CC := $(TOOLCHAIN_PREFIX)gcc
TARGET_CFLAGS := $(TARGET_CFLAGS.common)

32
ndk/build/toolchains/arm-eabi-4.4.0/setup.mk
View File

@@ -49,6 +49,9 @@ else
TARGET_ARCH_LDFLAGS :=
endif
TARGET_CFLAGS.neon := \
-mfpu=neon
TARGET_arm_release_CFLAGS := -O2 \
-fomit-frame-pointer \
-fstrict-aliasing \
@@ -70,6 +73,35 @@ TARGET_thumb_debug_CFLAGS := $(TARGET_thumb_release_CFLAGS) \
-marm \
-fno-omit-frame-pointer
# This function will be called to determine the target CFLAGS used to build
# a C or Assembler source file, based on its tags.
#
TARGET-process-src-files-tags = \
$(eval __arm_sources := $(call get-src-files-with-tag,arm)) \
$(eval __thumb_sources := $(call get-src-files-without-tag,arm)) \
$(eval __debug_sources := $(call get-src-files-with-tag,debug)) \
$(eval __release_sources := $(call get-src-files-without-tag,debug)) \
$(call set-src-files-target-cflags, \
$(call set_intersection,$(__arm_sources),$(__debug_sources)), \
$(TARGET_arm_debug_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__arm_sources),$(__release_sources)),\
$(TARGET_arm_release_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__arm_sources),$(__debug_sources)),\
$(TARGET_arm_debug_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__thumb_sources),$(__release_sources)),\
$(TARGET_thumb_release_CFLAGS)) \
$(call set-src-files-target-cflags,\
$(call set_intersection,$(__thumb_sources),$(__debug_sources)),\
$(TARGET_thumb_debug_CFLAGS)) \
$(call add-src-files-target-cflags,\
$(call get-src-files-with-tag,neon),\
$(TARGET_CFLAGS.neon)) \
$(call set-src-files-text,$(__arm_sources),arm$(space)$(space)) \
$(call set-src-files-text,$(__thumb_sources),thumb)
TARGET_CC := $(TOOLCHAIN_PREFIX)gcc
TARGET_CFLAGS := $(TARGET_CFLAGS.common) $(TARGET_ARCH_CFLAGS)