shader: support 64-bit buffer atomic minimum

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

@@ -69,6 +69,7 @@ constexpr MemoryOpcodeInfo MUBUF_OPCODE_LIST[] = {
     {0x40u, Opcode::BUFFER_ATOMIC_FMAX, 1, 32},
     {0x50u, Opcode::BUFFER_ATOMIC_SWAP_X2, 2, 32},
     {0x52u, Opcode::BUFFER_ATOMIC_ADD_X2, 2, 32},
+    {0x56u, Opcode::BUFFER_ATOMIC_UMIN_X2, 2, 32},
     {0x59u, Opcode::BUFFER_ATOMIC_AND_X2, 2, 32},
     {0x5au, Opcode::BUFFER_ATOMIC_OR_X2, 2, 32},
     {0x71u, Opcode::BUFFER_GL0_INV, 0, 0},

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

@@ -664,6 +664,7 @@ std::string InstructionToString(const Instruction& inst) {
 		case Opcode::BUFFER_ATOMIC_SUB:
 		case Opcode::BUFFER_ATOMIC_SMIN:
 		case Opcode::BUFFER_ATOMIC_UMIN:
+		case Opcode::BUFFER_ATOMIC_UMIN_X2:
 		case Opcode::BUFFER_ATOMIC_SMAX:
 		case Opcode::BUFFER_ATOMIC_UMAX:
 		case Opcode::BUFFER_ATOMIC_AND:

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

@@ -596,6 +596,7 @@ enum class Opcode {
 	BUFFER_ATOMIC_SUB,
 	BUFFER_ATOMIC_SMIN,
 	BUFFER_ATOMIC_UMIN,
+	BUFFER_ATOMIC_UMIN_X2,
 	BUFFER_ATOMIC_SMAX,
 	BUFFER_ATOMIC_UMAX,
 	BUFFER_ATOMIC_AND,