Thanks for reporting this.
Fixed.
Please update sources and recompile gcc.
Actually, very exotic case :)
And yesterday, I commited a binutils update. New section ".noinit" added...
Vars in this section will not be inited during system start-up.
~d
On Thursday 26 September 2002 09:20, Alexey Zaparovanny wrote:
> Hello,
>
> Looks like compiler generated buggy code when it handles "unsigned long
> int" types:
>
> Following simplified c code produces incorrect comparison code on line
> marked with "**--->"
>
> while(1) {
> if(cThreadIndex == cLastThreadIndex) {
> cThreadIndex = 0;
> } else {
> cThreadIndex++;
> }
> if((threads[cThreadIndex].m_cThreadFlags & THREAD_FLAG_SLEEPING) == 0) {
> break;
> **---> } else if(threads[cThreadIndex].m_dwWakeupTime <= dwCurrentTime) {
> break;
> }
> }
> ------
> Here is the assembly output: (this "restore r15 at the third line from the
> bottom upsets the flag register")
>
> .L6:
> cmp.b &cLastThreadIndex, &cThreadIndex
> jne .L9
> mov.b #llo(0), &cThreadIndex
> jmp .L10
> .L9:
> add.b #llo(1), &cThreadIndex
> .L10:
> mov.b &cThreadIndex, r14
> mov r14, r15
> rla r15
> rla r15
> add r14, r15
> rla r15
> add #threads+8, r15
> mov.b @r15, r15
> and.b #llo(1), r15
> tst.b r15
> jne .L11
> jmp .L7
> .L11:
> mov.b &cThreadIndex, r14
> mov r14, r15
> rla r15
> rla r15
> add r14, r15
> rla r15
> add #threads, r15
> mov &dwCurrentTime, r13
> mov &dwCurrentTime+2, r14
> sub @r15+, r13
> subc @r15+, r14
> sub #4, r15 ; restore r15
> jlo .L6
> .L7:
>
>
>
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