Re: [Qemu-devel] [PATCH 6/6] Do constant folding for unary operations.

[Richard Henderson]

On 05/20/2011 05:39 AM, Kirill Batuzov wrote:
> +    case INDEX_op_ext8s_i64:
> +        return x & (1 << 7) ? x | ~0xffULL : x & 0xff;
> +
> +    case INDEX_op_ext16s_i64:
> +        return x & (1 << 15) ? x | ~0xffffULL : x & 0xffff;
> +
> +    case INDEX_op_ext32s_i64:
> +        return x & (1U << 31) ? x | ~0xffffffffULL : x & 0xffffffff;

Likewise for letting the compiler help with appropriate casts.


r~