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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

76543210

C Z S V B CIRQE IRQE

–* *00–––

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:

1 2 ... 136 137 138 139 140 141 142 143 144 145 146 ... 215 216

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