Maxim Kuvyrkov <maxim@xxxxxxxxxxxxxxxx> writes:
> GLIBC contains the following code in stdlib/longlong.h:
> <snip>
> #if defined (__mips__) && W_TYPE_SIZE == 32
> #define umul_ppmm(w1, w0, u, v) \
> __asm__ ("multu %2,%3" \
> : "=l" ((USItype) (w0)), \
> "=h" ((USItype) (w1)) \
> : "d" ((USItype) (u)), \
> "d" ((USItype) (v)))
> #define UMUL_TIME 10
> #define UDIV_TIME 100
> #endif /* __mips__ */
> </snip>
>
> What would be a correct fix in this case? Something like this:
> <snip>
> #define umul_ppmm(w1, w0, u, v) \
> ({unsigned int __attribute__((mode(DI))) __xx; \
> __xx = (unsigned int __attribute__((mode(DI)))) u * v; \
> w0 = __xx & ((1 << 32) - 1); \
> w1 = __xx >> 32;})
> </snip>
>
> Or is there a better way?
All being well, you should just be able to do the same as I did for
GCC's copy of longlong.h (included in the patch you responded to).
Richard
