On Tue, Oct 15, 2002 at 08:38:37AM +0200, Martin v. Loewis wrote:
>
> In the code, there are two modifications to i, namely
>
> i++;
> j = 6;
> i--;
>
> So at the first sequence point, i should be incremented, and at the
> second sequence point, i should be decremented to its original value
> (regardless of the value of j, which does not need to be coordinated).
> AFAICT, in the sequence
>
> ldq $3,i($29) !literal
> lda $4,6($31)
> ldq $1,j($29) !literal
> ldl $2,0($3)
> stl $4,0($1)
> lda $2,1($2)
> stl $2,0($3)
>
> the value of i is never changed. Instead, it is loaded into $2, and
> then written back from $2 to i. That seems to be in violation of the
> volatile requirements to me.
I left out the assembly which decrements i, otherwise it is correct.
It's basically doing
j = 6;
i++;
i--;
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