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Annotation of researchv10dc/cmd/icon/setup/vax_sysv/rover.s, revision 1.1.1.1

1.1       root        1: .globl _ckadd
                      2: .globl _cksub
                      3: .globl _ckmul
                      4: 
                      5:  .text
                      6:  .align        1
                      7: _ckadd:        .word   0
                      8:        addl3   4(ap),8(ap),r0  # Perform addition
                      9:        jvs     oflow           # Branch if overflow
                     10:        ret                     # Return result in r0
                     11: 
                     12:  .align        1
                     13: _cksub: .word  0
                     14:        subl3   8(ap),4(ap),r0  # Perform subtraction
                     15:        jvs     oflow           # Branch if overflow
                     16:        ret                     # Return result in r0
                     17: 
                     18:  .align        1
                     19: _ckmul:        .word   0
                     20:        mull3   4(ap),8(ap),r0  # Perform multiplication
                     21:        jvs     oflow           # Branch if overflow
                     22:        ret                     # Return result in r0
                     23: 
                     24: oflow:                         # Got overflow on an operation
                     25:        pushl   $0
                     26:        pushl   $203
                     27:        calls   $1,_runerr              # runerr(203,0)

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