>> Every occurrence of r7 here is wrong (and some of the r6). Is there
>> any reason to do this in assembler code at all?
>
> The fact that the obvious C code generates ... a call to __ucmpdi2? :)
Hrm? Here's the "obvious" C code, portable to all architectures
(modulo the specific types used, this isn't a proposed patch):
unsigned int ucmpdi2(unsigned long long a, unsigned long long b)
{
unsigned long ahi, bhi, alo, blo;
ahi = a >> 32;
bhi = b >> 32;
if (ahi < bhi)
return 0;
if (ahi > bhi)
return 2;
alo = a;
blo = b;
if (alo < blo)
return 0;
if (alo > blo)
return 2;
return 1;
}
(libgcc does it a bit differently, with unions and stuff).
Segher
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