PM0056 datasheet(86/156 Pages) STMICROELECTRONICS

部件名	PM0056

功能描述	This programming manual provides information

PDF	156 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

86 / 156 page

The Cortex-M3 instruction set

PM0056

86/156

DocID15491 Rev 5

3.6.3

SDIV and UDIV

Signed divide and unsigned divide.

Syntax

SDIV{cond} {Rd,} Rn, Rm

UDIV{cond} {Rd,} Rn, Rm

where:

•

‘cond’ is an optional condition code (see Conditional execution on page 57)

•

‘Rd’ is the destination register. If Rd is omitted, the destination register is Rn

•

‘Rn,’ is the register holding the value to be divided

•

‘Rm’ is a register holding the divisor

Operation

SDIV performs a signed integer division of the value in Rn by the value in Rm.

UDIV performs an unsigned integer division of the value in Rn by the value in Rm.

For both instructions, if the value in Rn is not divisible by the value in Rm, the result is

rounded towards zero.

Restrictions

Do not use either SP or PC.

Condition flags

These instructions do not change the flags.

Examples

SDIVR0, R2, R4; signed divide, R0 = R2/R4

UDIVR8, R8, R1; unsigned divide, R8 = R8/R1

PM0056 数据表(PDF) 86 Page - STMicroelectronics