android下C函数调用arm汇编函数的问题

Question

androidcarm汇编

Answer 1

这是makefile:
LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)
LOCAL_MODULE    := opencv_java
LOCAL_SRC_FILES := $(LOCAL_PATH)/libopencv_java.so
include $(PREBUILT_SHARED_LIBRARY)include $(CLEAR_VARS)LOCAL_MODULE     := ldr_neon
LOCAL_SRC_FILES  := \
                    ImgProcessing.cpp \
                    ColorSpace_Conversion.cpp \
                    LDREnhancement.cpp \
                    main.cpp \
                    utils.cpp \
                    imgProcessing_arm.S \
                    imgProcess_neon.cpp.neon \
                    CLAHE.cpp.neonLOCAL_SHARED_LIBRARIES := \
                          opencv_javaLOCAL_CFLAGS :=-O3 -D__cpusplus -g -mfloat-abi=softfp -mfpu=neon -march=armv7-a -mtune=cortex-a15TARGET_ARCH_ABI :=armeabi-v7a
LOCAL_ARM_MODE := armLOCAL_ARM_NEON := trueLOCAL_C_INCLUDES := \
        ./include \
        ./include/opencv \
        ./include/opencv2 \include $(BUILD_EXECUTABLE)

Answer 2

汇编代码写在 imgProcessing_arm.S文件中，调用函数在LDREnhancement.cpp文件中

Answer 3

1. 首先你使用cpp，所以在你的cpp文件（LDREnhancement.cpp）中需要使用
extern "C" void  YUV_to_HSV_neon( unsigned char * in_Y_arm,......)；2 如果還不能解決的話，你試試把彙編文件中的
.func YUV_to_HSV_neon
改成 
.type YUV_to_HSV_neon, %function

Answer 4

哪有c文件，明明不都是cpp。那就得：
extern "C" void  YUV_to_HSV_neon( unsigned char * in_Y_arm,......)