diff --git a/CMakeLists.txt b/CMakeLists.txt index b1c3eba04..7e8591d77 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -329,6 +329,8 @@ set_option(SSE "Use SSE assembly routines" ${OPT_DEF_ASM}) set_option(SSE2 "Use SSE2 assembly routines" ${OPT_DEF_SSEMATH}) set_option(SSE3 "Use SSE3 assembly routines" ${OPT_DEF_SSEMATH}) set_option(ALTIVEC "Use Altivec assembly routines" ${OPT_DEF_ASM}) +set_option(ARMSIMD "use SIMD assembly blitters on ARM" ON) +set_option(ARMNEON "use NEON assembly blitters on ARM" ON) set_option(DISKAUDIO "Support the disk writer audio driver" ON) set_option(DUMMYAUDIO "Support the dummy audio driver" ON) set_option(VIDEO_DIRECTFB "Use DirectFB video driver" OFF) @@ -671,6 +673,61 @@ if(ASSEMBLY) endif() endif() endif() + + if(ARMSIMD) + set(ORIG_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -x assembler-with-cpp") + check_c_source_compiles(" + .text + .arch armv6 + .object_arch armv4 + .arm + .altmacro + #ifndef __ARM_EABI__ + #error EABI is required (to be sure that calling conventions are compatible) + #endif + pld [r0] + uqadd8 r0, r0, r0 + " ARMSIMD_FOUND) + set(CMAKE_REQUIRED_FLAGS "${ORIG_CMAKE_REQUIRED_FLAGS}") + + if(ARMSIMD_FOUND) + set(HAVE_ARMSIMD TRUE) + set(SDL_ARM_SIMD_BLITTERS 1) + file(GLOB ARMSIMD_SOURCES ${SDL2_SOURCE_DIR}/src/video/arm/pixman-arm-simd*.S) + set(SOURCE_FILES ${SOURCE_FILES} ${ARMSIMD_SOURCES}) + set(WARN_ABOUT_ARM_SIMD_ASM_MIT TRUE) + endif() + endif() + + if(ARMNEON) + set(ORIG_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}") + set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -x assembler-with-cpp") + check_c_source_compiles(" + .text + .fpu neon + .arch armv7a + .object_arch armv4 + .eabi_attribute 10, 0 + .arm + .altmacro + #ifndef __ARM_EABI__ + #error EABI is required (to be sure that calling conventions are compatible) + #endif + pld [r0] + vmovn.u16 d0, q0 + " ARMNEON_FOUND) + set(CMAKE_REQUIRED_FLAGS "${ORIG_CMAKE_REQUIRED_FLAGS}") + + if(ARMNEON_FOUND) + set(HAVE_ARMNEON TRUE) + set(SDL_ARM_NEON_BLITTERS 1) + file(GLOB ARMNEON_SOURCES ${SDL2_SOURCE_DIR}/src/video/arm/pixman-arm-neon*.S) + set(SOURCE_FILES ${SOURCE_FILES} ${ARMNEON_SOURCES}) + set(WARN_ABOUT_ARM_NEON_ASM_MIT TRUE) + endif() + endif() + elseif(MSVC_VERSION GREATER 1500) # TODO: SDL_cpuinfo.h needs to support the user's configuration wish # for MSVC - right now it is always activated @@ -1927,6 +1984,24 @@ if(UNIX) message(STATUS "") endif() +if(WARN_ABOUT_ARM_SIMD_ASM_MIT) + message(STATUS "") + message(STATUS "SDL is being built with ARM SIMD optimizations, which") + message(STATUS "uses code licensed under the MIT license. If this is a") + message(STATUS "problem, please disable that code by rerunning CMake with:") + message(STATUS "") + message(STATUS " -DARMSIMD=OFF") +endif() + +if(WARN_ABOUT_ARM_NEON_ASM_MIT) + message(STATUS "") + message(STATUS "SDL is being built with ARM NEON optimizations, which") + message(STATUS "uses code licensed under the MIT license. If this is a") + message(STATUS "problem, please disable that code by rerunning CMake with:") + message(STATUS "") + message(STATUS " -DARMNEON=OFF") +endif() + # Ensure that the extra cflags are used at compile time set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${EXTRA_CFLAGS}") diff --git a/include/SDL_config.h.cmake b/include/SDL_config.h.cmake index e791aef4a..34220f3ff 100644 --- a/include/SDL_config.h.cmake +++ b/include/SDL_config.h.cmake @@ -415,6 +415,8 @@ /* Enable assembly routines */ #cmakedefine SDL_ASSEMBLY_ROUTINES @SDL_ASSEMBLY_ROUTINES@ #cmakedefine SDL_ALTIVEC_BLITTERS @SDL_ALTIVEC_BLITTERS@ +#cmakedefine SDL_ARM_SIMD_BLITTERS @SDL_ARM_SIMD_BLITTERS@ +#cmakedefine SDL_ARM_NEON_BLITTERS @SDL_ARM_NEON_BLITTERS@ /* Enable dynamic libsamplerate support */ #cmakedefine SDL_LIBSAMPLERATE_DYNAMIC @SDL_LIBSAMPLERATE_DYNAMIC@