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| author | Kenneth Graunke <kenneth@whitecape.org> | 2013-07-07 18:38:38 -0700 |
|---|---|---|
| committer | Kenneth Graunke <kenneth@whitecape.org> | 2013-10-13 00:10:44 -0700 |
| commit | 1a82081db6e57eaa74f852ed8acb391a7f4c2ca6 (patch) | |
| tree | 32213973060fe67f5530e6a6c3f16b2c74e95ba7 /src/mesa/main/macros.h | |
| parent | 50c9f04c5f5700ac27f8552694d2a2f2ab6fe89f (diff) | |
| download | external_mesa3d-1a82081db6e57eaa74f852ed8acb391a7f4c2ca6.zip external_mesa3d-1a82081db6e57eaa74f852ed8acb391a7f4c2ca6.tar.gz external_mesa3d-1a82081db6e57eaa74f852ed8acb391a7f4c2ca6.tar.bz2 | |
mesa: Move ROUND_DOWN_TO() macro from i915/i965 to macros.h.
This seems generally useful, so it may as well live in core Mesa.
In fact, the comment for ALIGN() in macros.h actually says to "see also"
ROUND_DOWN_TO, which...was in a driver somewhere.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Diffstat (limited to 'src/mesa/main/macros.h')
| -rw-r--r-- | src/mesa/main/macros.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h index 05aad4e..4bb17d8 100644 --- a/src/mesa/main/macros.h +++ b/src/mesa/main/macros.h @@ -675,6 +675,18 @@ minify(unsigned value, unsigned levels) */ #define ALIGN(value, alignment) (((value) + (alignment) - 1) & ~((alignment) - 1)) +/** + * Align a value down to an alignment value + * + * If \c value is not already aligned to the requested alignment value, it + * will be rounded down. + * + * \param value Value to be rounded + * \param alignment Alignment value to be used. This must be a power of two. + * + * \sa ALIGN() + */ +#define ROUND_DOWN_TO(value, alignment) ((value) & ~(alignment - 1)) /** Cross product of two 3-element vectors */ |