I do not see this in my manual. So a google search turned up: http://gcc.gnu.org/ml/gcc/2007-01/msg00613.html, which says it's the same as the cdqe instruction. Perhaps I can anticipate your next question. cdqe converts the doubleword in eax to a quadword in rax with the same numerical value. On Thu, 2007-03-15 at 01:17 +0100, ninjaboy wrote: > hello, > what does cltq do? > > 0x0000000000400500 <my_m+4>: movl $0x0,0xfffffffffffffffc(%rbp) > 0x0000000000400507 <my_m+11>: jmp 0x40051b <my_m+31> > 0x0000000000400509 <my_m+13>: mov 0xfffffffffffffffc(%rbp),%eax > 0x000000000040050c <my_m+16>: mov $0x4004e8,%edx > 0x0000000000400511 <my_m+21>: cltq > 0x0000000000400513 <my_m+23>: mov %rdx,0xffffffffffffffa0(%rbp,%rax,8) > 0x0000000000400518 <my_m+28>: incl 0xfffffffffffffffc(%rbp) > 0x000000000040051b <my_m+31>: cmpl $0xc,0xfffffffffffffffc(%rbp) > 0x000000000040051f <my_m+35>: jle 0x400509 <my_m+13> > > what compares? > Thanks in advance, - To unsubscribe from this list: send the line "unsubscribe linux-assembly" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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