add USE_ASM/USE_XBYAK option to cmake

CMakeLists.txt

@@ -22,6 +22,16 @@ option(
 	"use gmp"
 	ON
 )
+option(
+	USE_ASM
+	"use asm"
+	ON
+)
+option(
+	USE_XBYAK
+	"use xbyak"
+	ON
+)
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
@@ -42,6 +52,7 @@ else()
 		add_definitions(-DMCL_MAX_BIT_SIZE=${MCL_MAX_BIT_SIZE})
 	endif()
 
+	if(USE_ASM)
 		if(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "aarch64")
 			add_definitions(-DMCL_USE_LLVM=1)
 			set(SRCS ${SRCS} src/asm/aarch64.s)
@@ -59,6 +70,7 @@ else()
 			set(SRCS ${SRCS} src/asm/x86-64.s src/asm/x86-64.bmi2.s)
 			set(CPU x86-64)
 		endif()
+	endif()
 	set(LIBS mcl)
 	if(USE_GMP)
 		set(LIBS ${LIBS} gmp gmpxx)
@@ -74,6 +86,9 @@ endif()
 if(NOT USE_OPENSSL)
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMCL_DONT_USE_OPENSSL")
 endif()
+if(NOT USE_XBYAK)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMCL_DONT_USE_XBYAK")
+endif()
 
 if(DOWNLOAD_SOURCE)
 	if(MSVC)