PM0223 datasheet(62/110 Pages) STMICROELECTRONICS

部件名	PM0223

功能描述	This programming manual provides information for application and system-level software developers

PDF	110 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

62 / 110 page

The STM32L0 Cortex-M0+ Instruction Set

PM0223

62/110

DocID025763 Rev 1

3.5.7

REV, REV16, and REVSH

Reverse bytes.

Syntax

REV Rd, Rn

REV16 Rd, Rn

REVSH Rd, Rn

where:

Operation

Use these instructions to change endianness of data:

RER

Restrictions

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

Condition flags

These instructions do not change the flags.

Examples

REV

R3, R7

; Reverse byte order of value in R7 and write it to R3

REV16

R0, R0

; Reverse byte order of each 16-bit halfword in R0

REVSH

R0, R5

; Reverse signed halfword

Is the destination register.

Is the source register.

REV

Converts 32-bit big-endian data into little-endian data or 32-bit little-endian

data into big-endian data.

REV16

Converts two packed 16-bit big-endian data into little-endian data or two

packed 16-bit little-endian data into big-endian data.

REVSH

Converts 16-bit signed big-endian data into 32-bit signed little-endian data or

16-bit signed little-endian data into 32-bit signed big-endian data.

PM0223 数据表(PDF) 62 Page - STMicroelectronics

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