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Frozen
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The Zbc extension is frozen. |
Carry-less multiplication is the multiplication in the polynomial ring over GF(2).
clmul produces the lower half of the carry-less product and clmulh produces the upper half of the 2✕XLEN carry-less product.
clmulr produces bits 2✕XLEN−2:XLEN-1 of the 2✕XLEN carry-less product.
| RV32 | RV64 | Mnemonic | Instruction |
|---|---|---|---|
✓ |
✓ |
clmul rd, rs1, rs2 |
|
✓ |
✓ |
clmulh rd, rs1, rs2 |
|
✓ |
✓ |
clmulr rd, rs1, rs2 |