shader: add conditional 64-bit scalar moves

Co-authored-by: shadowbeat070 <70843316+shadowbeat070@users.noreply.github.com>

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

@@ -38,6 +38,7 @@ constexpr OpcodeMap SOP2_OPCODE_LIST[] = {
 constexpr OpcodeMap SOP1_OPCODE_LIST[] = {
     {0x03u, Opcode::S_MOV_B32},
     {0x04u, Opcode::S_MOV_B64},
+    {0x06u, Opcode::S_CMOV_B64},
     {0x07u, Opcode::S_NOT_B32},
     {0x08u, Opcode::S_NOT_B64},
     {0x0au, Opcode::S_WQM_B64},

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

@@ -469,6 +469,7 @@ std::string InstructionToString(const Instruction& inst) {
 	switch (inst.opcode) {
 		case Opcode::S_MOV_B32:
 		case Opcode::S_MOV_B64:
+		case Opcode::S_CMOV_B64:
 			return WithUnsupportedReason(inst, fmt::format("0x{:08x}: {} {}, {}", inst.pc,
 			                                               magic_enum::enum_name(inst.opcode),
 			                                               OperandToString(inst.dst).c_str(),

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

@@ -38,6 +38,7 @@ enum class Opcode {
 
 	S_MOV_B32,
 	S_MOV_B64,
+	S_CMOV_B64,
 	S_MOVK_I32,
 	S_ABS_I32,
 	S_ABSDIFF_I32,