Re: [Qemu-trivial] [Qemu-devel] [PATCH for 1.6] hw/core: Fix wrong left shift (build regression)

[Andreas Färber]

Am 31.07.2013 07:00, schrieb Stefan Weil:
> Shifting a long int (32 bit) by 40 bit positions won't work.
> Compiler message:
> 
> hw/core/qdev-properties.c: In function ‘print_size’:
> hw/core/qdev-properties.c:1180:5: warning: left shift count >= width of type
> 
> Signed-off-by: Stefan Weil <address@hidden>
> ---
>  hw/core/qdev-properties.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Compare rth's patch:
http://patchwork.ozlabs.org/patch/263513/

Andreas

> 
> diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
> index 8d43a8d..e82ab87 100644
> --- a/hw/core/qdev-properties.c
> +++ b/hw/core/qdev-properties.c
> @@ -1177,7 +1177,7 @@ static int print_size(DeviceState *dev, Property *prop, 
> char *dest, size_t len)
>      int i = 0;
>      uint64_t div;
>  
> -    for (div = (long int)1 << 40; !(*ptr / div) ; div >>= 10) {
> +    for (div = 1ULL << 40; !(*ptr / div); div >>= 10) {
>          i++;
>      }
>      return snprintf(dest, len, "%0.03f%c", (double)*ptr/div, suffixes[i]);
> 


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