SLAU367P October 2012 – April 2020 MSP430FR5041 , MSP430FR5043 , MSP430FR50431 , MSP430FR5847 , MSP430FR58471 , MSP430FR5848 , MSP430FR5849 , MSP430FR5857 , MSP430FR5858 , MSP430FR5859 , MSP430FR5867 , MSP430FR58671 , MSP430FR5868 , MSP430FR5869 , MSP430FR5870 , MSP430FR5872 , MSP430FR58721 , MSP430FR5887 , MSP430FR5888 , MSP430FR5889 , MSP430FR58891 , MSP430FR5922 , MSP430FR59221 , MSP430FR5947 , MSP430FR59471 , MSP430FR5948 , MSP430FR5949 , MSP430FR5957 , MSP430FR5958 , MSP430FR5959 , MSP430FR5962 , MSP430FR5964 , MSP430FR5967 , MSP430FR5968 , MSP430FR5969 , MSP430FR5969-SP , MSP430FR59691 , MSP430FR5970 , MSP430FR5972 , MSP430FR59721 , MSP430FR5986 , MSP430FR5987 , MSP430FR5988 , MSP430FR5989 , MSP430FR5989-EP , MSP430FR59891 , MSP430FR5992 , MSP430FR5994 , MSP430FR59941 , MSP430FR6005 , MSP430FR6007 , MSP430FR6035 , MSP430FR6037 , MSP430FR60371 , MSP430FR6041 , MSP430FR6043 , MSP430FR60431 , MSP430FR6045 , MSP430FR6047 , MSP430FR60471 , MSP430FR6820 , MSP430FR6822 , MSP430FR68221 , MSP430FR6870 , MSP430FR6872 , MSP430FR68721 , MSP430FR6877 , MSP430FR6879 , MSP430FR68791 , MSP430FR6887 , MSP430FR6888 , MSP430FR6889 , MSP430FR68891 , MSP430FR6920 , MSP430FR6922 , MSP430FR69221 , MSP430FR6927 , MSP430FR69271 , MSP430FR6928 , MSP430FR6970 , MSP430FR6972 , MSP430FR69721 , MSP430FR6977 , MSP430FR6979 , MSP430FR69791 , MSP430FR6987 , MSP430FR6988 , MSP430FR6989 , MSP430FR69891
| JGE | Jump if greater or equal (signed) | |
| Syntax | JGE label | |
| Operation | If (N .xor. V) = 0: PC + (2 × Offset) → PC
If (N .xor. V) = 1: execute following instruction |
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| Description |
The negative bit N and the overflow bit V in the SR are tested. If both bits are set or both are reset, the signed 10-bit word offset contained in the instruction is multiplied by 2, sign extended, and added to the 20-bit PC. This means a jump in the range -511 to +512 words relative to the PC in full memory range. If only 1 bit is set, the instruction after the jump is executed. JGE is used for the comparison of signed operands: also for incorrect results due to overflow, the decision made by the JGE instruction is correct. Note that JGE emulates the nonimplemented JP (jump if positive) instruction if used after the instructions AND, BIT, RRA, SXTX, and TST. These instructions clear the V bit. |
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| Status Bits | Status bits are not affected. | |
| Mode Bits | OSCOFF, CPUOFF, and GIE are not affected. | |
| Example | If byte EDE (lower 64 K) contains positive data, go to Label1. Software can run in the full memory range. | |
TST.B &EDE ; Is EDE positive? V <- 0
JGE Label1 ; Yes, JGE emulates JP
... ; No, 80h <= EDE <= FFh
| Example | If the content of R6 is greater than or equal to the memory pointed to by R7, the program continues a Label5. Signed data. Data and program in full memory range. | |
CMP @R7,R6 ; Is R6 >= @R7?
JGE Label5 ; Yes, go to Label5
... ; No, continue here
| Example | If R5 ≥ 12345h (signed operands), the program continues at Label2. Program in full memory range. | |
CMPA #12345h,R5 ; Is R5 >= 12345h?
JGE Label2 ; Yes, 12344h < R5 <= 7FFFFh
... ; No, 80000h <= R5 < 12345h