Mesa (master): vl/vlc: add remove bits function
Christian König
deathsimple at kemper.freedesktop.org
Thu Feb 6 15:19:55 UTC 2014
Module: Mesa
Branch: master
Commit: 9ef42a54a7480272fb3bbedd11c84a8b77dae41f
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=9ef42a54a7480272fb3bbedd11c84a8b77dae41f
Author: Christian König <christian.koenig at amd.com>
Date: Tue Sep 17 07:22:34 2013 -0600
vl/vlc: add remove bits function
Signed-off-by: Christian König <christian.koenig at amd.com>
---
src/gallium/auxiliary/vl/vl_vlc.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h
index 451fd5e..401b50e 100644
--- a/src/gallium/auxiliary/vl/vl_vlc.h
+++ b/src/gallium/auxiliary/vl/vl_vlc.h
@@ -338,4 +338,16 @@ vl_vlc_search_byte(struct vl_vlc *vlc, unsigned num_bits, uint8_t value)
}
}
+/**
+ * remove num_bits bits starting at pos from the bitbuffer
+ */
+static INLINE void
+vl_vlc_removebits(struct vl_vlc *vlc, unsigned pos, unsigned num_bits)
+{
+ uint64_t lo = (vlc->buffer & (~0UL >> (pos + num_bits))) << num_bits;
+ uint64_t hi = (vlc->buffer & (~0UL << (64 - pos)));
+ vlc->buffer = lo | hi;
+ vlc->invalid_bits += num_bits;
+}
+
#endif /* vl_vlc_h */
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