diff options
Diffstat (limited to 'lib/test_bitmap.c')
| -rw-r--r-- | lib/test_bitmap.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/lib/test_bitmap.c b/lib/test_bitmap.c index 1c352c1edfa5..cd4cb36e42a5 100644 --- a/lib/test_bitmap.c +++ b/lib/test_bitmap.c @@ -854,6 +854,31 @@ static void __init test_for_each_set_bit_from(void) } } +static void __init test_bitmap_weight(void) +{ + unsigned int bit, w1, w2, w; + DECLARE_BITMAP(b, 30); + + bitmap_parselist("all:1/2", b, 30); + + /* Test inline implementation */ + w = bitmap_weight(b, 30); + w1 = bitmap_weight(b, 15); + w2 = bitmap_weight_from(b, 15, 30); + + expect_eq_uint(15, w); + expect_eq_uint(8, w1); + expect_eq_uint(7, w2); + + /* Test outline implementation */ + w = bitmap_weight(exp1, EXP1_IN_BITS); + for (bit = 0; bit < EXP1_IN_BITS; bit++) { + w1 = bitmap_weight(exp1, bit); + w2 = bitmap_weight_from(exp1, bit, EXP1_IN_BITS); + expect_eq_uint(w1 + w2, w); + } +} + static void __init test_for_each_clear_bit(void) { DECLARE_BITMAP(orig, 500); @@ -1444,6 +1469,7 @@ static void __init selftest(void) test_bitmap_const_eval(); test_bitmap_read_write(); test_bitmap_read_perf(); + test_bitmap_weight(); test_bitmap_write_perf(); test_find_nth_bit(); |