Breakpoint Displays for NonSymbolic Programs › Automatic Breakpoint › Next and Previous Instructions

Next and Previous Instructions

The line directly below the last line of the BLLS or REGS area indicates the next instruction to be executed and the instruction that was executed previously. In the previous illustration, the following lines appears:

NEXT ZAP   X'A28'(4,RD),X'2F1'(3,RD)        AT +007A4 
PREV STH   R0,0(,R1)                        AT +007A0

• In the field marked Next, the Assembler instruction that was scheduled to be executed next when the breakpoint occurred is displayed. In this example, the instruction is a ZAP. The first operand is located at displacement A28 from the value in register D for a length of 4, while the second operand is located at displacement 2F1 from the value in register D for a length of 3.

  Following the instruction, on the same line, at +007A4 gives the displacement of the instruction in the program (7A4). If the instruction resides outside the program, the address of the instruction is given instead, expressed as eight-hexadecimal digits.

• In the field marked Prev, the Assembler instruction that was executed just before the breakpoint occurred is displayed. In this example, the instruction is a STH. The first operand value is in register 0, while the second operand location is at displacement 0 from the value in register 1

  To the right of the instruction, on the same line, at +007A0 is the displacement of the instruction in the program (7A0). If the instruction resides outside the program, the address of the instruction is given instead, expressed as eight hexadecimal digits.