960 B
960 B
| Opcode | Instruction | Op/En | 64-Bit Mode | Compat/Leg Mode | Description |
|---|---|---|---|---|---|
| F6 /4 | MUL r/m8 | M | Valid | Valid | Unsigned multiply (AX := AL ∗ r/m8). |
| REX + F6 /4 | MUL r/m8* | M | Valid | N.E. | Unsigned multiply (AX := AL ∗ r/m8). |
| F7 /4 | MUL r/m16 | M | Valid | Valid | Unsigned multiply (DX:AX := AX ∗ r/m16). |
| F7 /4 | MUL r/m32 | M | Valid | Valid | Unsigned multiply (EDX:EAX := EAX ∗ r/m32). |
| REX.W + F7 /4 | MUL r/m64 | M | Valid | N.E. | Unsigned multiply (RDX:RAX := RAX ∗ r/m64). |
*In 64-bit mode, r/m8 can not be encoded to access the following byte registers if a REX prefix is used: AH, BH, CH, DH.