[PATCH v2 13/28] Input: Use trunc instead of lrintf in acceleration code
Daniel Stone
daniel at fooishbar.org
Thu Jun 9 10:17:21 PDT 2011
For compatibility with all the rest of the input code.
Signed-off-by: Daniel Stone <daniel at fooishbar.org>
---
dix/ptrveloc.c | 9 ++-------
1 files changed, 2 insertions(+), 7 deletions(-)
v2: New.
diff --git a/dix/ptrveloc.c b/dix/ptrveloc.c
index dfccf15..c506791 100644
--- a/dix/ptrveloc.c
+++ b/dix/ptrveloc.c
@@ -1167,19 +1167,14 @@ acceleratePointerPredictable(
if (dx) {
float tmp;
tmp = mult * fdx + dev->last.remainder[0];
- /* Since it may not be apparent: lrintf() does not offer
- * strong statements about rounding; however because we
- * process each axis conditionally, there's no danger
- * of a toggling remainder. Its lack of guarantees likely
- * makes it faster on the average target. */
- tmpi = lrintf(tmp);
+ tmpi = trunc(tmp);
valuator_mask_set(val, 0, tmpi);
dev->last.remainder[0] = tmp - (float)tmpi;
}
if (dy) {
float tmp;
tmp = mult * fdy + dev->last.remainder[1];
- tmpi = lrintf(tmp);
+ tmpi = trunc(tmp);
valuator_mask_set(val, 1, tmpi);
dev->last.remainder[1] = tmp - (float)tmpi;
}
--
1.7.5.3
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