Initial Linux Aarch64 support

* Update asmjit dependency (aarch64 branch)
* Disable USE_DISCORD_RPC by default
* Dump some JIT objects in rpcs3 cache dir
* Add SIGILL handler for all platforms
* Fix resetting zeroing denormals in thread pool
* Refactor most v128:: utils into global gv_** functions
* Refactor PPU interpreter (incomplete), remove "precise"
* - Instruction specializations with multiple accuracy flags
* - Adjust calling convention for speed
* - Removed precise/fast setting, replaced with static
* - Started refactoring interpreters for building at runtime JIT
*   (I got tired of poor compiler optimizations)
* - Expose some accuracy settings (SAT, NJ, VNAN, FPCC)
* - Add exec_bytes PPU thread variable (akin to cycle count)
* PPU LLVM: fix VCTUXS+VCTSXS instruction NaN results
* SPU interpreter: remove "precise" for now (extremely non-portable)
* - As with PPU, settings changed to static/dynamic for interpreters.
* - Precise options will be implemented later
* Fix termination after fatal error dialog

3rdparty/discord-rpc/CMakeLists.txt

@@ -2,7 +2,7 @@
 add_library(3rdparty_discordRPC INTERFACE)
 
 # We don't want Discord Rich Presence on the BSDs and other OSes
-if (USE_DISCORD_RPC AND (WIN32 OR CMAKE_SYSTEM MATCHES "Linux" OR APPLE))
+if (USE_DISCORD_RPC AND (WIN32 OR CMAKE_SYSTEM MATCHES "Linux" OR APPLE) AND COMPILER_X86)
 	if (WIN32 AND NOT MSVC)
 		ExternalProject_Add(discordRPC
 				GIT_REPOSITORY https://github.com/discordapp/discord-rpc

3rdparty/llvm.cmake

@@ -1,8 +1,10 @@
 if(WITH_LLVM)
+	CHECK_CXX_COMPILER_FLAG("-msse -msse2 -mcx16" COMPILER_X86)
+	CHECK_CXX_COMPILER_FLAG("-march=armv8-a+lse" COMPILER_ARM)
+
 	if(BUILD_LLVM_SUBMODULE)
 		message(STATUS "LLVM will be built from the submodule.")
 
-		set(LLVM_TARGETS_TO_BUILD "X86" CACHE INTERNAL "")
 		option(LLVM_BUILD_RUNTIME OFF)
 		option(LLVM_BUILD_TOOLS OFF)
 		option(LLVM_INCLUDE_BENCHMARKS OFF)
@@ -61,7 +63,15 @@ if(WITH_LLVM)
 		endif()
 	endif()
 
-	set(LLVM_LIBS LLVMMCJIT LLVMX86CodeGen LLVMX86AsmParser)
+	set(LLVM_LIBS LLVMMCJIT)
+
+	if(COMPILER_X86)
+		set(LLVM_LIBS ${LLVM_LIBS} LLVMX86CodeGen LLVMX86AsmParser)
+	endif()
+
+	if(COMPILER_ARM)
+		set(LLVM_LIBS ${LLVM_LIBS} LLVMX86CodeGen LLVMX86AsmParser LLVMARMCodeGen LLVMARMAsmParser)
+	endif()
 
 	if(WIN32 OR CMAKE_SYSTEM MATCHES "Linux")
 		set(LLVM_LIBS ${LLVM_LIBS} LLVMIntelJITEvents)