diff options
| -rw-r--r-- | drivers/net/wireless/b43/phy_lp.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/net/wireless/b43/phy_lp.c b/drivers/net/wireless/b43/phy_lp.c index 7e70c078475..5306f2c66b3 100644 --- a/drivers/net/wireless/b43/phy_lp.c +++ b/drivers/net/wireless/b43/phy_lp.c @@ -1032,9 +1032,10 @@ static int lpphy_loopback(struct b43_wldev *dev) return index; } +/* Fixed-point division algorithm using only integer math. */ static u32 lpphy_qdiv_roundup(u32 dividend, u32 divisor, u8 precision) { - u32 quotient, remainder, rbit, roundup, tmp; + u32 quotient, remainder; if (divisor == 0) return 0; @@ -1042,20 +1043,16 @@ static u32 lpphy_qdiv_roundup(u32 dividend, u32 divisor, u8 precision) quotient = dividend / divisor; remainder = dividend % divisor; - rbit = divisor & 0x1; - roundup = (divisor >> 1) + rbit; - - while (precision != 0) { - tmp = remainder - roundup; + while (precision > 0) { quotient <<= 1; - if (remainder >= roundup) - remainder = (tmp << 1) + rbit; - else - remainder <<= 1; + if (remainder << 1 >= divisor) { + quotient++; + remainder = (remainder << 1) - divisor; + } precision--; } - if (remainder >= roundup) + if (remainder << 1 >= divisor) quotient++; return quotient; |