sha512.c 32-bit warning

[Andreas Jaeger]

On 08/15/2012 10:38 PM, Roland McGrath wrote:
> sha512.c now gets a warning when compiled on any 32-bit configuration.
> Can you fix that?

Indeed - warning is:
sha512.c: In function ‘sha512_process_block’:
sha512.c:128:3: warning: right shift count >= width of type [enabled by 
default]

for this line:
   ctx->total[TOTAL128_high] += ((len >> 63 >> 1)
				+ (ctx->total[TOTAL128_low] < lolen));

and total is uint64_t.

I'll look the next days into it,

Andreas
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