Zacas Instructions
2 RISC-V instructions in this extension - click any row for encoding, pseudocode, and full documentation.
| Mnemonic | Syntax | Format | Summary |
|---|---|---|---|
| AMOCAS.D | AMOCAS.D rd, rs2, (rs1) | R-Type (Atomic) | Atomically compares 64-bit memory at rs1 with rd; if equal, writes rs2 to memory. |
| AMOCAS.W | AMOCAS.W rd, rs2, (rs1) | R-Type (Atomic) | Atomically compares memory at rs1 with rd; if equal, writes rs2 to memory. Returns original value in rd. |