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SMUL Instruction UM018809-0611

158

ZNEO

CPU Core

User Manual

SMUL

Definition

Signed Multiply

Syntax

SMUL dst, src

Operation

dst  (dst

 src)[31:0]

src  (dst

 src)[63:32]

Description

This instruction performs a multiplication of two signed 32-bit values with a signed 64-bit result.

Result bits [31:0] are written to the destination register. Result bits [63:32] are written to the

source register.

Flags

Syntax and Opcodes

76543210

C Z S V B CIRQE IRQE

–* *00–––

Legend

C = No change.

Z = Set to 1 if bits [63:0] of the result are zero; otherwise set to 0.

S = Set to 1 if bit [63] 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

SMUL Rd, Rs {B1H, Rs, Rd}

1 2 ... 169 170 171 172 173 174 175 176 177 178 179 ... 215 216

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