diff --git a/av1/common/warped_motion.c b/av1/common/warped_motion.c
index 89534de..ad92150 100644
--- a/av1/common/warped_motion.c
+++ b/av1/common/warped_motion.c
@@ -139,31 +139,6 @@
   }
 }
 
-static const int16_t filter_4tap[WARPEDPIXEL_PREC_SHIFTS][4] = {
-  { 0, 128, 0, 0 },     { -1, 127, 2, 0 },    { -2, 127, 4, -1 },
-  { -3, 126, 6, -1 },   { -3, 125, 8, -2 },   { -4, 124, 11, -3 },
-  { -5, 123, 13, -3 },  { -5, 121, 15, -3 },  { -6, 120, 18, -4 },
-  { -7, 119, 20, -4 },  { -7, 118, 22, -5 },  { -8, 116, 25, -5 },
-  { -8, 115, 27, -6 },  { -9, 113, 30, -6 },  { -9, 112, 32, -7 },
-  { -9, 110, 34, -7 },  { -10, 108, 37, -7 }, { -10, 107, 39, -8 },
-  { -10, 105, 41, -8 }, { -11, 103, 44, -8 }, { -11, 101, 47, -9 },
-  { -11, 99, 49, -9 },  { -11, 97, 51, -9 },  { -11, 95, 54, -10 },
-  { -11, 93, 56, -10 }, { -12, 91, 59, -10 }, { -12, 89, 61, -10 },
-  { -12, 87, 64, -11 }, { -12, 85, 66, -11 }, { -12, 82, 69, -11 },
-  { -12, 80, 71, -11 }, { -12, 78, 73, -11 }, { -11, 75, 75, -11 },
-  { -11, 73, 78, -12 }, { -11, 71, 80, -12 }, { -11, 69, 82, -12 },
-  { -11, 66, 85, -12 }, { -11, 64, 87, -12 }, { -10, 61, 89, -12 },
-  { -10, 59, 91, -12 }, { -10, 56, 93, -11 }, { -10, 54, 95, -11 },
-  { -9, 51, 97, -11 },  { -9, 49, 99, -11 },  { -9, 47, 101, -11 },
-  { -8, 44, 103, -11 }, { -8, 41, 105, -10 }, { -8, 39, 107, -10 },
-  { -7, 37, 108, -10 }, { -7, 34, 110, -9 },  { -7, 32, 112, -9 },
-  { -6, 30, 113, -9 },  { -6, 27, 115, -8 },  { -5, 25, 116, -8 },
-  { -5, 22, 118, -7 },  { -4, 20, 119, -7 },  { -4, 18, 120, -6 },
-  { -3, 15, 121, -5 },  { -3, 13, 123, -5 },  { -3, 11, 124, -4 },
-  { -2, 8, 125, -3 },   { -1, 6, 126, -3 },   { -1, 4, 127, -2 },
-  { 0, 2, 127, -1 },
-};
-
 static const int16_t
     filter_ntap[WARPEDPIXEL_PREC_SHIFTS][WARPEDPIXEL_FILTER_TAPS] = {
       { 0, 0, 128, 0, 0, 0 },      { 0, -1, 128, 2, -1, 0 },
@@ -700,7 +675,7 @@
     g = s = scale = 0.0;
     if (i < m) {
       for (k = i; k < m; k++) scale += fabs(u[k][i]);
-      if (scale) {
+      if (scale != 0.) {
         for (k = i; k < m; k++) {
           u[k][i] /= scale;
           s += u[k][i] * u[k][i];
@@ -721,7 +696,7 @@
     g = s = scale = 0.0;
     if (i < m && i != n - 1) {
       for (k = l; k < n; k++) scale += fabs(u[i][k]);
-      if (scale) {
+      if (scale != 0.) {
         for (k = l; k < n; k++) {
           u[i][k] /= scale;
           s += u[i][k] * u[i][k];
@@ -743,7 +718,7 @@
 
   for (i = n - 1; i >= 0; i--) {
     if (i < n - 1) {
-      if (g) {
+      if (g != 0.) {
         for (j = l; j < n; j++) v[j][i] = (u[i][j] / u[i][l]) / g;
         for (j = l; j < n; j++) {
           for (s = 0.0, k = l; k < n; k++) s += u[i][k] * v[k][j];
@@ -760,7 +735,7 @@
     l = i + 1;
     g = w[i];
     for (j = l; j < n; j++) u[i][j] = 0.0;
-    if (g) {
+    if (g != 0.) {
       g = 1.0 / g;
       for (j = l; j < n; j++) {
         for (s = 0.0, k = l; k < m; k++) s += u[k][i] * u[k][j];
@@ -848,7 +823,7 @@
         }
         z = pythag(f, h);
         w[j] = z;
-        if (z) {
+        if (z != 0.) {
           z = 1.0 / z;
           c = f * z;
           s = h * z;