PM0215 datasheet(55/91 Pages) STMICROELECTRONICS

Teilenummer	PM0215

Bauteilbeschribung	STM32F0xxx Cortex-M0 programming manual

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Hersteller	STMICROELECTRONICS [STMicroelectronics]

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55 / 91 page

PM0215

The STM32 Cortex-M0 instruction set

Doc ID 022979 Rev 1

55/91

3.5.6

MULS

Multiply using 32-bit operands, and producing a 32-bit result.

Syntax

MULS Rd, Rn, Rm

where:

●

‘Rd’ is the destination register

●

‘Rn, Rm’ are registers holding the values to be multiplied.

Operation

The MUL instruction multiplies the values in the registers specified by Rn and Rm, and

places the least significant 32 bits of the result in Rd. The condition code flags are updated

on the result of the operation, see Conditional execution on page 39.

The results of this instruction does not depend on whether the operands are signed or

unsigned.

Restrictions

In this instruction:

●

Rd, Rn, and Rm must only specify R0-R7

●

Rd must be the same as Rm.

Condition flags

This instruction updates the N and Z flags according to the result. It does not affect the C or

V flags.

Examples

MULS

R0, R2, R0

; Multiply with flag update, R0 = R0 x R2

PM0215 Datenblatt(PDF) 55 Page - STMicroelectronics