shader: implement BUFFER_ATOMIC_CMPSWAP (#357)

shader: implement RDNA2 buffer atomic compare swap

Co-authored-by: nmzik <Nmzik@mail.ru>

src/graphics/shader/recompiler/frontend/decode/MemoryOps.cpp

@@ -47,6 +47,7 @@ constexpr MemoryOpcodeInfo MUBUF_OPCODE_LIST[] = {
     {0x1eu, Opcode::BUFFER_STORE_DWORDX4, 4, 32},
     {0x1fu, Opcode::BUFFER_STORE_DWORDX3, 3, 32},
     {0x30u, Opcode::BUFFER_ATOMIC_SWAP, 1, 32},
+    {0x31u, Opcode::BUFFER_ATOMIC_CMPSWAP, 1, 32},
     {0x32u, Opcode::BUFFER_ATOMIC_ADD, 1, 32},
     {0x33u, Opcode::BUFFER_ATOMIC_SUB, 1, 32},
     {0x35u, Opcode::BUFFER_ATOMIC_SMIN, 1, 32},

src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.cpp

@@ -592,6 +592,7 @@ std::string InstructionToString(const Instruction& inst) {
 		case Opcode::TBUFFER_STORE_FORMAT_XYZ:
 		case Opcode::TBUFFER_STORE_FORMAT_XYZW:
 		case Opcode::BUFFER_ATOMIC_SWAP:
+		case Opcode::BUFFER_ATOMIC_CMPSWAP:
 		case Opcode::BUFFER_ATOMIC_SWAP_X2:
 		case Opcode::BUFFER_ATOMIC_ADD:
 		case Opcode::BUFFER_ATOMIC_SUB:

src/graphics/shader/recompiler/frontend/decode/ShaderDecoder.h

@@ -455,6 +455,7 @@ enum class Opcode {
 	TBUFFER_STORE_FORMAT_XYZ,
 	TBUFFER_STORE_FORMAT_XYZW,
 	BUFFER_ATOMIC_SWAP,
+	BUFFER_ATOMIC_CMPSWAP,
 	BUFFER_ATOMIC_SWAP_X2,
 	BUFFER_ATOMIC_ADD,
 	BUFFER_ATOMIC_SUB,