Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO データシート

153

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

Signed Divide and Unsigned Divide.

Syntax

SDIV{cond} {Rd,} Rn, Rm

UDIV{cond} {Rd,} Rn, Rm

where:

cond

is an optional condition code, see 

.

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 SP and do not use PC

Condition Flags

These instructions do not change the flags.

Examples

SDIV

R0, R2, R4

; Signed divide, R0 = R2/R4

UDIV

R8, R8, R1

; Unsigned divide, R8 = R8/R1