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1.1 ! root 1: .globl _runerr ! 2: .globl _ckadd ! 3: .globl _cksub ! 4: .globl _ckmul ! 5: ! 6: .globl csv, cret ! 7: .text ! 8: _ckadd: ! 9: mov r5,-(sp) ! 10: mov sp,r5 ! 11: mov 6(r5),r1 ! 12: mov 4(r5),r0 ! 13: add 12(r5),r1 ! 14: adc r0 ! 15: bvs oflow ! 16: add 10(r5),r0 ! 17: bvs oflow ! 18: br return ! 19: ! 20: _cksub: ! 21: mov r5,-(sp) ! 22: mov sp,r5 ! 23: mov 6(r5),r1 ! 24: mov 4(r5),r0 ! 25: sub 12(r5),r1 ! 26: sbc r0 ! 27: bvs oflow ! 28: sub 10(r5),r0 ! 29: bvs oflow ! 30: return: ! 31: mov r5,sp ! 32: mov (sp)+,r5 ! 33: rts pc ! 34: ! 35: _ckmul: ! 36: jsr r5,csv ! 37: mov 6(r5),r2 ! 38: sxt r1 ! 39: sub 4(r5),r1 ! 40: mov 10.(r5),r0 ! 41: sxt r3 ! 42: sub 8.(r5),r3 ! 43: mul r0,r1 ! 44: mul r2,r3 ! 45: add r1,r3 ! 46: mul r2,r0 ! 47: sub r3,r0 ! 48: jmp cret ! 49: ! 50: oflow: ! 51: clr -(sp) ! 52: mov $203.,-(sp) ! 53: jsr pc,_runerr
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