decode 66c3 [RET_2] decode 66c20000 [RET_IMM_2 imm2:0x0] decode 66c20d00 [RET_IMM_2 imm2:0xd] decode 66c20dff [RET_IMM_2 imm2:0xff0d] decode32 c3 [RET_4] decode32 c20000 [RET_IMM_4 imm2:0x0] decode32 c20d00 [RET_IMM_4 imm2:0xd] decode32 c20dff [RET_IMM_4 imm2:0xff0d] decode64 c3 [RET_8] decode64 c20000 [RET_IMM_8 imm2:0x0] decode64 c20d00 [RET_IMM_8 imm2:0xd] decode64 c20dff [RET_IMM_8 imm2:0xff0d]