diff options
| author | Matt Oliver <protogonoi@gmail.com> | 2015-10-16 17:00:13 +1100 |
|---|---|---|
| committer | Matt Oliver <protogonoi@gmail.com> | 2015-10-19 13:40:51 +1100 |
| commit | b0bb1dc62d40dc385283f309012f64d0987883eb (patch) | |
| tree | d26ee6556cbfdce8e4d18cc427eca398ba829f67 /libavutil/x86/intmath.h | |
| parent | 216cc1f6fe33b256ce708fade5e6638b2bb54d2b (diff) | |
lavu/intmath.h: Move x86 only msvc/icl functions to x86 specific header.
Signed-off-by: Matt Oliver <protogonoi@gmail.com>
Diffstat (limited to 'libavutil/x86/intmath.h')
| -rw-r--r-- | libavutil/x86/intmath.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/libavutil/x86/intmath.h b/libavutil/x86/intmath.h index 3ba5ed072c..7881e3c7b6 100644 --- a/libavutil/x86/intmath.h +++ b/libavutil/x86/intmath.h @@ -26,6 +26,11 @@ #if HAVE_FAST_CLZ #if defined(__INTEL_COMPILER) +# define ff_log2(x) (_bit_scan_reverse((x)|1)) +# define ff_log2_16bit av_log2 + +# define ff_ctz(v) _bit_scan_forward(v) + # define ff_ctzll ff_ctzll_x86 static av_always_inline av_const int ff_ctzll_x86(long long v) { @@ -38,6 +43,21 @@ static av_always_inline av_const int ff_ctzll_x86(long long v) # endif } #elif defined(_MSC_VER) +# define ff_log2 ff_log2_x86 +static av_always_inline av_const int ff_log2_x86(unsigned int v) { + unsigned long n; + _BitScanReverse(&n, v | 1); + return n; +} +# define ff_log2_16bit av_log2 + +# define ff_ctz ff_ctz_x86 +static av_always_inline av_const int ff_ctz_x86(int v) { + unsigned long c; + _BitScanForward(&c, v); + return c; +} + # define ff_ctzll ff_ctzll_x86 static av_always_inline av_const int ff_ctzll_x86(long long v) { |