Texas Instruments MSP430x1xx User Manual

Page 385

Advertising
background image

Instruction Set Overview

B-35

Instruction Set Description

JGE

Jump if greater or equal

Syntax

JGE

label

Operation

If (N .XOR. V) = 0 then jump to label: PC + 2

×

offset –> PC

If (N .XOR. V) = 1 then execute the following instruction

Description

The status register negative bit (N) and overflow bit (V) are tested. If both N
and V are set or reset, the 10-bit signed offset contained in the instruction LSBs
is added to the program counter. If only one is set, the instruction following the
jump is executed.

This allows comparison of signed integers.

Status Bits

Status bits are not affected.

Example

When the content of R6 is greater or equal to the memory pointed to by R7,
the program continues at label EDE.

CMP

@R7,R6

; R6

(R7)?, compare on signed numbers

JGE

EDE

; Yes, R6

(R7)

......

; No, proceed

......
......

Advertising