Minor optimization of div64_64. do_div() already does optimization
for the case of 32 by 32 divide, so no need to do it here.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- net-2.6.22.orig/lib/div64.c 2007-03-21 12:03:59.000000000 -0700
+++ net-2.6.22/lib/div64.c 2007-03-21 12:04:46.000000000 -0700
@@ -61,20 +61,18 @@
/* 64bit divisor, dividend and result. dynamic precision */
uint64_t div64_64(uint64_t dividend, uint64_t divisor)
{
- uint32_t d = divisor;
+ uint32_t high, d;
- if (divisor > 0xffffffffULL) {
- unsigned int shift = fls(divisor >> 32);
+ high = divisor >> 32;
+ if (high) {
+ unsigned int shift = fls(high);
d = divisor >> shift;
dividend >>= shift;
- }
+ } else
+ d = divisor;
- /* avoid 64 bit division if possible */
- if (dividend >> 32)
- do_div(dividend, d);
- else
- dividend = (uint32_t) dividend / d;
+ do_div(dividend, d);
return dividend;
}
-
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