PM0223 datasheet(61/110 Pages) STMICROELECTRONICS

Part #	PM0223

Description	This programming manual provides information for application and system-level software developers

PDF	110 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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PM0223

The STM32L0 Cortex-M0+ Instruction Set

3.5.6

MULS

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

Syntax

MULS Rd, Rn, Rm

where:

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 3.3.6: Conditional execution on page 43.

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

unsigned.

Restrictions

In this instruction:

•

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

•

must be the same as Rm.

Condition flags

This instruction:

•

Updates the N and Z flags according to the result.

•

Does not affect the C or V flags.

Examples

MULS

R0, R2, R0

; Multiply with flag update, R0 = R0 x R2

Is the destination register.

Rn, Rm

Ire registers holding the values to be multiplied.

PM0223 Datasheet(PDF) 61 Page - STMicroelectronics