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Android: only build dec_neon with NEON support

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Defining LOCAL_ARM_NEON = true can result in neon instructions being
used in portions unprotected by the cpu check.
This changes defines a WEBP_USE_NEON/WEBP_ANDROID_NEON pair similar to
the SSE2 code and MSVC.

Change-Id: Ifac010b06e42c73d5aca529baa2198c6796674bd
This commit is contained in:
James Zern 2012-05-08 13:22:24 -07:00
parent b5f2a9ed49
commit 255c66b48f
5 changed files with 18 additions and 6 deletions
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6
Android.mk
View File

@ -15,7 +15,6 @@ LOCAL_SRC_FILES := \
src/dec/webp.c \
src/dsp/cpu.c \
src/dsp/dec.c \
src/dsp/dec_neon.c \
src/dsp/dec_sse2.c \
src/dsp/enc.c \
src/dsp/enc_sse2.c \
@ -58,7 +57,10 @@ LOCAL_CFLAGS := -Wall -DANDROID -DHAVE_MALLOC_H -DHAVE_PTHREAD \
LOCAL_C_INCLUDES += $(LOCAL_PATH)/src
ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
LOCAL_ARM_NEON := true
# Setting LOCAL_ARM_NEON will enable -mfpu=neon which may cause illegal
# instructions to be generated for armv7a code. Instead target the neon code
# specifically.
LOCAL_SRC_FILES += src/dsp/dec_neon.c.neon
endif
LOCAL_STATIC_LIBRARIES := cpufeatures

2
src/dsp/cpu.c
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@ -57,7 +57,7 @@ static int x86CPUInfo(CPUFeature feature) {
return 0;
}
VP8CPUInfo VP8GetCPUInfo = x86CPUInfo;
#elif defined(__ANDROID__)
#elif defined(WEBP_ANDROID_NEON)
static int AndroidCPUInfo(CPUFeature feature) {
const AndroidCpuFamily cpu_family = android_getCpuFamily();
const uint64_t cpu_features = android_getCpuFeatures();

2
src/dsp/dec.c
View File

@ -719,7 +719,7 @@ void VP8DspInit(void) {
if (VP8GetCPUInfo(kSSE2)) {
VP8DspInitSSE2();
}
#elif defined(__GNUC__) && defined(__ARM_NEON__)
#elif defined(WEBP_USE_NEON)
if (VP8GetCPUInfo(kNEON)) {
VP8DspInitNEON();
}

6
src/dsp/dec_neon.c
View File

@ -10,7 +10,9 @@
// Authors: Somnath Banerjee (somnath@google.com)
// Johann Koenig (johannkoenig@google.com)
#if defined(__GNUC__) && defined(__ARM_NEON__)
#include "./dsp.h"
#if defined(WEBP_USE_NEON)
#include "../dec/vp8i.h"
@ -324,4 +326,4 @@ void VP8DspInitNEON(void) {
} // extern "C"
#endif
#endif // __GNUC__ && __ARM_NEON__
#endif // WEBP_USE_NEON

8
src/dsp/dsp.h
View File

@ -29,6 +29,14 @@ extern "C" {
#define WEBP_USE_SSE2
#endif
#if defined(__ANDROID__) && defined(__ARM_ARCH_7A__)
#define WEBP_ANDROID_NEON // Android targets that might support NEON
#endif
#if defined(__ARM_NEON__) || defined(WEBP_ANDROID_NEON)
#define WEBP_USE_NEON
#endif
typedef enum {
kSSE2,
kSSE3,