@@ -954,6 +954,8 @@ HAVE_LIST="

     dos_paths

     ebp_available

     ebx_available

+    exp2

+    exp2f

     fast_64bit

     fast_cmov

     fast_unaligned

@@ -970,6 +972,7 @@ HAVE_LIST="

     libdc1394_2

     llrint

     log2

+    log2f

     loongson

     lrint

     lrintf

@@ -2379,8 +2382,11 @@ done

 check_lib math.h sin -lm

 check_lib va/va.h vaInitialize -lva

+check_func exp2

+check_func exp2f

 check_func llrint

 check_func log2

+check_func log2f

 check_func lrint

 check_func lrintf

 check_func round

@@ -263,6 +263,20 @@ if ((y) < (x)) {\

     }\

 }

+#if !HAVE_EXP2

+static av_always_inline av_const double exp2(double x)

+{

+    return exp(x * 0.693147180559945);

+}

+#endif /* HAVE_EXP2 */

+

+#if !HAVE_EXP2F

+static av_always_inline av_const float exp2f(float x)

+{

+    return exp2(x);

+}

+#endif /* HAVE_EXP2F */

+

 #if !HAVE_LLRINT

 static av_always_inline av_const long long llrint(double x)

 {

@@ -277,6 +291,13 @@ static av_always_inline av_const double log2(double x)

 }

 #endif /* HAVE_LOG2 */

+#if !HAVE_LOG2F

+static av_always_inline av_const float log2f(float x)

+{

+    return log2(x);

+}

+#endif /* HAVE_LOG2F */

+

 #if !HAVE_LRINT

 static av_always_inline av_const long int lrint(double x)

 {