diff options
| author | Christian König <christian.koenig@amd.com> | 2013-09-17 07:22:34 -0600 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2014-02-06 16:16:33 +0100 |
| commit | 9ef42a54a7480272fb3bbedd11c84a8b77dae41f (patch) | |
| tree | d851fa2193641717dda27fb656d3baa67a9b8999 /src/gallium/auxiliary/vl | |
| parent | fe0f9ab056c938451bf742e334f49df4d72f0856 (diff) | |
vl/vlc: add remove bits function
Signed-off-by: Christian König <christian.koenig@amd.com>
Diffstat (limited to 'src/gallium/auxiliary/vl')
| -rw-r--r-- | src/gallium/auxiliary/vl/vl_vlc.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/vl/vl_vlc.h b/src/gallium/auxiliary/vl/vl_vlc.h index 451fd5edb78..401b50e2563 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 */ |