diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2016-09-02 23:14:54 +0200 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2016-09-07 20:52:42 +0200 |
| commit | 29fc9bb855cb878aee263cd1fe110e3bb3e98c80 (patch) | |
| tree | ed7851f88b58378aa54afa56e755375da3684647 /src/commonlib | |
| parent | 614ffc60cfd667dae63492d14af2abd50ce91b3e (diff) | |
| download | coreboot-29fc9bb855cb878aee263cd1fe110e3bb3e98c80.tar.xz | |
commonlib: move DIV_ROUND macros from nvidia/tegra
DIV_ROUND_CLOSEST and DIV_ROUND_UP are useful macros for other
architectures. This patch moves them from soc/nvidia/tegra/types.h
to commonlib/include/commonlib/helpers.h .
Change-Id: I54521d9b197934cef8e352f9a5c4823015d85f01
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/16415
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/commonlib')
| -rw-r--r-- | src/commonlib/include/commonlib/helpers.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/commonlib/include/commonlib/helpers.h b/src/commonlib/include/commonlib/helpers.h index 0318e447d1..1be1fbb709 100644 --- a/src/commonlib/include/commonlib/helpers.h +++ b/src/commonlib/include/commonlib/helpers.h @@ -34,6 +34,22 @@ #define ABS(a) (((a) < 0) ? (-(a)) : (a)) #define CEIL_DIV(a, b) (((a) + (b) - 1) / (b)) #define IS_POWER_OF_2(x) (((x) & ((x) - 1)) == 0) +#define DIV_ROUND_UP(x, y) (((x) + (y) - 1) / (y)) +/* + * Divide positive or negative dividend by positive divisor and round + * to closest integer. Result is undefined for negative divisors and + * for negative dividends if the divisor variable type is unsigned. + */ +#define DIV_ROUND_CLOSEST(x, divisor)( \ +{ \ + typeof(x) __x = x; \ + typeof(divisor) __d = divisor; \ + (((typeof(x))-1) > 0 || \ + ((typeof(divisor))-1) > 0 || (__x) > 0) ? \ + (((__x) + ((__d) / 2)) / (__d)) : \ + (((__x) - ((__d) / 2)) / (__d)); \ +} \ +) /* Standard units. */ #define KiB (1<<10) |