* Uros Bizjak:
> +#elif defined(__x86_64__)
> +#define __cpuid(level, a, b, c, d) \
> + __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t" \
> + "cpuid\n\t" \
> + "xchg{q}\t{%%}rbx, %q1\n\t" \
> + : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
> + : "0" (level))
> +
> +#define __cpuid_count(level, count, a, b, c, d) \
> + __asm__ ("xchg{q}\t{%%}rbx, %q1\n\t" \
> + "cpuid\n\t" \
> + "xchg{q}\t{%%}rbx, %q1\n\t" \
> + : "=a" (a), "=r" (b), "=c" (c), "=d" (d) \
> + : "0" (level), "2" (count))
> +#endif
Shouldn't the constraint for b be "=&r"?
