libvpx: Pull from upstream

source/libvpx/vp9/encoder/vp9_subexp.c

Index: source/libvpx/vp9/encoder/vp9_subexp.c
===================================================================
--- source/libvpx/vp9/encoder/vp9_subexp.c	(revision 290053)
+++ source/libvpx/vp9/encoder/vp9_subexp.c	(working copy)
@@ -16,7 +16,24 @@
 
 #define vp9_cost_upd256  ((int)(vp9_cost_one(upd) - vp9_cost_zero(upd)))
 
-static int update_bits[255];
+static const int update_bits[255] = {
+   5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,
+   6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,
+   8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,
+   8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,  8,
+  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+  10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
+  10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,
+  11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11,  0,
+};
 
 static int recenter_nonneg(int v, int m) {
   if (v > (m << 1))
@@ -61,18 +78,6 @@
   return i;
 }
 
-static int count_term_subexp(int word) {
-  if (word < 16)
-    return 5;
-  if (word < 32)
-    return 6;
-  if (word < 64)
-    return 8;
-  if (word < 129)
-    return 10;
-  return 11;
-}
-
 static int prob_diff_update_cost(vp9_prob newp, vp9_prob oldp) {
   int delp = remap_prob(newp, oldp);
   return update_bits[delp] * 256;
@@ -111,12 +116,6 @@
   encode_term_subexp(w, delp);
 }
 
-void vp9_compute_update_table() {
-  int i;
-  for (i = 0; i < 254; i++)
-    update_bits[i] = count_term_subexp(i);
-}
-
 int vp9_prob_diff_update_savings_search(const unsigned int *ct,
                                         vp9_prob oldp, vp9_prob *bestp,
                                         vp9_prob upd) {