OPERAND_GPR
[B_16] = { 4, 16, OPERAND_BASE | OPERAND_GPR },
[B_32] = { 4, 32, OPERAND_BASE | OPERAND_GPR },
[R_8] = { 4, 8, OPERAND_GPR },
[R_12] = { 4, 12, OPERAND_GPR },
[R_16] = { 4, 16, OPERAND_GPR },
[R_24] = { 4, 24, OPERAND_GPR },
[R_28] = { 4, 28, OPERAND_GPR },
[X_12] = { 4, 12, OPERAND_INDEX | OPERAND_GPR },
if (operand->flags & OPERAND_GPR)