Re: [Qemu-devel] [PATCH v2 6/6] Do constant folding for unary operations.

[Richard Henderson]

On 06/09/2011 03:45 AM, Kirill Batuzov wrote:
> +    case INDEX_op_ext8s_i32:
> +        return (int32_t)(int8_t)x;
> +
> +    case INDEX_op_ext16s_i32:
> +        return (int32_t)(int16_t)x;

No need to cast back to a 32-bit type.  They'll be
extended properly for the return type which is TCGArg.
And if you drop these intermediate casts, you can
merge the 32 and 64-bit copies.


r~