Change Details

1. In order to be compatible with the form of the atomic instruction in GAS that accepts the fourth operand as 0 (i.e. `am* $rd, $rk, $rj, 0`), we need to treat `$rj, 0` as one operand, but only print `$rj`. 2. Modified the number of result operands of inline assembly memory operand `ZB` constraint to 2 (reg + 0). 3. Restrictions on register usage in `am*` instructions have also been adjusted. When `$rd` is equal to `R0`, the instruction must be considered legal, because of some special usage, eg: PseudoUNIMP.

In order to be compatible with the form of the atomic instruction in GAS that accepts the fourth operand as 0 (i.e. `am* $rd, $rk, $rj, 0`), we need to treat `$rj, 0` as one operand, but only print `$rj`. For this, the number of result operands of inline assembly memory operand `ZB` constraint is modified to 2 (reg + 0). Restrictions on register usage in `am*` instructions have also been adjusted. When `$rd` is equal to `$r0`, the instruction must be considered legal, because of some special usage like `PseudoUNIMP`.

1. In order to be compatible with the form of the atomic instruction in GAS that accepts the fourth operand as 0 (i.e. `am* $rd, $rk, $rj, 0`), we need to treat `$rj, 0` as one operand, but only print `$rj`. 2.For this, Modified the number of result operands of inline assembly memory operand `ZB` constraint is modified to 2 (reg + 0). 3. Restrictions on register usage in `am*` instructions have also been adjusted. When `$rd` is equal to `R0``$r0`, the instruction must be considered legal, because of some special usage, eg: like `PseudoUNIMP`.