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| author | klaar36 <klas.arvidsson@liu.se> | 2015-03-20 17:30:24 +0100 |
|---|---|---|
| committer | klaar36 <klas.arvidsson@liu.se> | 2015-03-20 17:30:24 +0100 |
| commit | e7bc50ca8ffcaa6ed68ebd2315f78b0f5a7d10ad (patch) | |
| tree | 4de97af7207676b69cb6a9aba8cb443cc134855d /src/lib/round.h | |
| parent | b0418a24e709f0632d2ede5b0f327c422931939b (diff) | |
| download | pintos-rs-e7bc50ca8ffcaa6ed68ebd2315f78b0f5a7d10ad.tar.gz | |
Initial Pintos
Diffstat (limited to 'src/lib/round.h')
| -rw-r--r-- | src/lib/round.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/lib/round.h b/src/lib/round.h new file mode 100644 index 0000000..3aa6642 --- /dev/null +++ b/src/lib/round.h @@ -0,0 +1,18 @@ +#ifndef __LIB_ROUND_H +#define __LIB_ROUND_H + +/* Yields X rounded up to the nearest multiple of STEP. + For X >= 0, STEP >= 1 only. */ +#define ROUND_UP(X, STEP) (((X) + (STEP) - 1) / (STEP) * (STEP)) + +/* Yields X divided by STEP, rounded up. + For X >= 0, STEP >= 1 only. */ +#define DIV_ROUND_UP(X, STEP) (((X) + (STEP) - 1) / (STEP)) + +/* Yields X rounded down to the nearest multiple of STEP. + For X >= 0, STEP >= 1 only. */ +#define ROUND_DOWN(X, STEP) ((X) / (STEP) * (STEP)) + +/* There is no DIV_ROUND_DOWN. It would be simply X / STEP. */ + +#endif /* lib/round.h */ |