Zilog Z16F2810 User Manual
Page 141
UM018809-0611
MUL Instruction
ZNEO
®
CPU Core
User Manual
125
MUL
Definition
Multiply
Syntax
MUL dst, src
Operation
dst
dst
src
Description
This instruction performs a multiplication of two 32-bit values with an 32-bit result. The 32-bit
result is written to the destination register. The source register is not changed. Results larger than
FFFF_FFFFH are truncated to 32 bits. If a larger result is required, use SMUL or UMUL.
Flags
Flags are set based on the 32-bit destination register value.
Syntax and Opcodes
7
6
5
4
3
2
1
0
C
Z
S
V
B
CIRQE IRQE
–
*
*
0
0
–
–
–
Legend
C
= No change.
Z
= Set to 1 if the result is zero; otherwise, set to 0.
S
= Set to 1 if bit [31] of the result is 1; otherwise set to 0.
V
= Cleared to 0.
B
= Cleared to 0.
CIRQE
= No change.
IRQE
= No change.
Instruction, Operands
Word 0
Word 1
Word 2
MUL Rd, Rs
{B2H, Rs, Rd}
Note: