bugProgramming from the Ground Up Book - Bugs: bug #22256, booksize 1.0 page 281 Appendix E,...

 
 

bug #22256: booksize 1.0 page 281 Appendix E, operands of cmpl swapped

Submitter:  None
Submitted:  Fri 08 Feb 2008 11:16:56 AM UTC
 
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Fri 08 Feb 2008 11:16:56 AM UTC, original submission:  

On page 281 in Appendix E there is the following assembly code:

loop_begin:
  movl a, %eax
  movl b, %ebx
  cmpl %eax, %ebx
  jge loop_end
  ...

which should correspond to the C loop:
while (a < b)
{
  /* Do stuff here */
}

I think the operands in cmpl have to be swapped. It should be:
cmpl %ebx, %eax
jge loop_end

Anonymous

 

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