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authorJames Almer <jamrial@gmail.com>2015-07-18 16:52:42 -0300
committerJames Almer <jamrial@gmail.com>2015-07-18 19:59:34 -0300
commit78347549a4449ebac65add844b93a53bbbf559da (patch)
tree621d85085f541fb1969f6590694382f170d301b0 /libavutil
parent9a829a2b6a7a5bc7f6fb492577daaaec43c9f6c8 (diff)
downloadffmpeg-78347549a4449ebac65add844b93a53bbbf559da.tar.gz
avutil/intmath: check for ICC before GCC
Intel compiler also defines __GNUC__, so the Intel specific intrinsics were not really being used. Reviewed-by: Michael Niedermayer <michaelni@gmx.at> Signed-off-by: James Almer <jamrial@gmail.com>
Diffstat (limited to 'libavutil')
-rw-r--r--libavutil/intmath.h18
1 files changed, 9 insertions, 9 deletions
diff --git a/libavutil/intmath.h b/libavutil/intmath.h
index f5ecc77b7d..ef347f4108 100644
--- a/libavutil/intmath.h
+++ b/libavutil/intmath.h
@@ -39,22 +39,22 @@
*/
#if HAVE_FAST_CLZ
-#if AV_GCC_VERSION_AT_LEAST(3,4)
+#if defined( __INTEL_COMPILER )
#ifndef ff_log2
-# define ff_log2(x) (31 - __builtin_clz((x)|1))
+# define ff_log2(x) (_bit_scan_reverse((x)|1))
# ifndef ff_log2_16bit
# define ff_log2_16bit av_log2
# endif
#endif /* ff_log2 */
-#elif defined( __INTEL_COMPILER )
+#elif AV_GCC_VERSION_AT_LEAST(3,4)
#ifndef ff_log2
-# define ff_log2(x) (_bit_scan_reverse((x)|1))
+# define ff_log2(x) (31 - __builtin_clz((x)|1))
# ifndef ff_log2_16bit
# define ff_log2_16bit av_log2
# endif
#endif /* ff_log2 */
-#endif
#endif /* AV_GCC_VERSION_AT_LEAST(3,4) */
+#endif
extern const uint8_t ff_log2_tab[256];
@@ -115,13 +115,13 @@ static av_always_inline av_const int ff_log2_16bit_c(unsigned int v)
*/
#if HAVE_FAST_CLZ
-#if AV_GCC_VERSION_AT_LEAST(3,4)
+#if defined( __INTEL_COMPILER )
#ifndef ff_ctz
-#define ff_ctz(v) __builtin_ctz(v)
+#define ff_ctz(v) _bit_scan_forward(v)
#endif
-#elif defined( __INTEL_COMPILER )
+#elif AV_GCC_VERSION_AT_LEAST(3,4)
#ifndef ff_ctz
-#define ff_ctz(v) _bit_scan_forward(v)
+#define ff_ctz(v) __builtin_ctz(v)
#endif
#endif
#endif