PM0215 datasheet(51/91 Pages) STMICROELECTRONICS

tên linh kiện	PM0215

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PM0215

The STM32 Cortex-M0 instruction set

Doc ID 022979 Rev 1

51/91

3.5.2

ANDS, ORRS, EORS and BICS

Logical AND, OR, exclusive OR and bit clear.

Syntax

ANDS {Rd,} Rn, Rm

ORRS {Rd,} Rn, Rm

EORS {Rd,} Rn, Rm

BICS {Rd,} Rn, Rm

where:

●

‘Rd’ is the destination register

●

‘Rn’ is the register holding the first operand and is the same as the destination register.

●

‘Rm’ is the second register.

Operation

The AND, EOR, and ORR instructions perform bitwise AND, exclusive OR, and inclusive OR

operations on the values in Rn and Rm.

The BIC instruction performs an AND operation on the bits in Rn with the logical negation of

the corresponding bits in the value of Rm.

The condition code flags are updated on the result of the operation, seeThe condition flags

on page 39.

Restrictions

In these instructions, Rd, Rn, and Rm must only specify R0-R7.

Condition flags

These instructions:

●

update the N and Z flags according to the result

●

do not affect the C or V flag.

Examples

ANDS

R2, R2, R1

ORRS

R2, R2, R5

ANDS

R5, R5, R8

EORS

R7, R7, R6

BICS

R0, R0, R1

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