libvpx: Pull from upstream

source/libvpx/vpx_ports/bitops.h

Index: source/libvpx/vpx_ports/bitops.h
diff --git a/source/libvpx/vp9/common/vp9_systemdependent.h b/source/libvpx/vpx_ports/bitops.h
similarity index 73%
rename from source/libvpx/vp9/common/vp9_systemdependent.h
rename to source/libvpx/vpx_ports/bitops.h
index fc77762def57fac7cc6467cd914fe67a81821c25..0d3223e32ba3bc27340cf05cecbe4bdbaf870c0b 100644
--- a/source/libvpx/vp9/common/vp9_systemdependent.h
+++ b/source/libvpx/vpx_ports/bitops.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef VP9_COMMON_VP9_SYSTEMDEPENDENT_H_
-#define VP9_COMMON_VP9_SYSTEMDEPENDENT_H_
+#ifndef VPX_PORTS_BITOPS_H_
+#define VPX_PORTS_BITOPS_H_
 
 #include "vpx_ports/msvc.h"
 
@@ -25,24 +25,6 @@
 extern "C" {
 #endif
 
-#include "./vpx_config.h"
-#if ARCH_X86 || ARCH_X86_64
-void vpx_reset_mmx_state(void);
-#define vp9_clear_system_state() vpx_reset_mmx_state()
-#else
-#define vp9_clear_system_state()
-#endif
-
-#if defined(_MSC_VER) && _MSC_VER < 1800
-// round is not defined in MSVC before VS2013.
-static INLINE int round(double x) {
-  if (x < 0)
-    return (int)ceil(x - 0.5);
-  else
-    return (int)floor(x + 0.5);
-}
-#endif
-
 // use GNU builtins where available.
 #if defined(__GNUC__) && \
     ((__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
@@ -81,4 +63,4 @@ static INLINE int get_msb(unsigned int n) {
 }  // extern "C"
 #endif
 
-#endif  // VP9_COMMON_VP9_SYSTEMDEPENDENT_H_
+#endif  // VPX_PORTS_BITOPS_H_