diff options
| author | Ian Moffett <ian@osmora.org> | 2025-07-23 19:04:54 -0400 |
|---|---|---|
| committer | Ian Moffett <ian@osmora.org> | 2025-07-23 19:04:54 -0400 |
| commit | cc3803f6fffd4506bcac794d381403aefdd8dfa0 (patch) | |
| tree | 9dbd822a601820a3f2113fdf6305885397efc1d9 | |
| parent | d0f80773522b2dec7c8f314934fecc1b8e203166 (diff) | |
docs: Introduce Mask Register Over instructions
Introduce 4 new instructions that allow a register to be filled to
either 1s or 0s. An example of filling 8-bits of an X<n> register:
--
mrob x0, #1
--
An example of filling 16-bits of an X<n> register:
--
! Mrow :3
mrow x0, #1
--
...
Signed-off-by: Ian Moffett <ian@osmora.org>
| -rw-r--r-- | README.md | 14 |
1 files changed, 9 insertions, 5 deletions
@@ -94,11 +94,15 @@ and can be accessed through two special instructions. Bitwise logic operations can write to all registers except `v0`-`v7`, `x0` and `pc`. Can read from all registers except `v0`-`v7`. -| Mnemonic | Effect | -| -------------------------------- | ---------------------- | -| `and` dst: r, reg: r, val: r/imm | `dst` = `dst` & `val` | -| `or` dst: r, reg: r, val: r/imm | `dst` = `dst` \| `val` | -| `xor` dst: r, reg: r, val: r/imm | `dst` = `dst` ^ `val` | +| Mnemonic | Effect | +| -------------------------------- | ------------------------------- | +| `and` dst: r, reg: r, val: r/imm | `dst` = `dst` & `val` | +| `or` dst: r, reg: r, val: r/imm | `dst` = `dst` \| `val` | +| `xor` dst: r, reg: r, val: r/imm | `dst` = `dst` ^ `val` | +| `mrob` dst: r: mask [bit]: imm | Fill byte of 'dst' with 'mask' | +| `mrow` dst: r: mask [bit]: imm | Fill word of 'dst' with 'mask' | +| `mrod` dst: r: mask [bit]: imm | Fill dword of 'dst' with 'mask' | +| `mroq` dst: r: mask [bit]: imm | Fill qword of 'dst' with 'mask' | #### Example ``` |