Fix up signed-integer-overflow warnings

src/core/SkBitmapProcState_matrixProcs.cpp

 /*
  * Copyright 2008 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // The copyright below was added in 2009, but I see no record of moto contributions...?
 
 /* NEON optimized code (C) COPYRIGHT 2009 Motorola
@@ skipping 77 matching lines @@
     // only clamp lives in the right coord space to check for decal
     ClampX_ClampY_nofilter_scale,
     ClampX_ClampY_filter_scale,
     ClampX_ClampY_nofilter_affine,
     ClampX_ClampY_filter_affine,
     NoFilterProc_Persp<ClampTileProcs>,
     ClampX_ClampY_filter_persp
 };
 
 #define MAKENAME(suffix)        RepeatX_RepeatY ## suffix
-#define TILEX_PROCF(fx, max)    SK_USHIFT16(((fx) & 0xFFFF) * ((max) + 1))
-#define TILEY_PROCF(fy, max)    SK_USHIFT16(((fy) & 0xFFFF) * ((max) + 1))
-#define TILEX_LOW_BITS(fx, max) ((((fx) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
-#define TILEY_LOW_BITS(fy, max) ((((fy) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
+#define TILEX_PROCF(fx, max)    SK_USHIFT16((unsigned)((fx) & 0xFFFF) * ((max) + 1))
+#define TILEY_PROCF(fy, max)    SK_USHIFT16((unsigned)((fy) & 0xFFFF) * ((max) + 1))
+#define TILEX_LOW_BITS(fx, max) (((unsigned)((fx) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
+#define TILEY_LOW_BITS(fy, max) (((unsigned)((fy) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
 #include "SkBitmapProcState_matrix.h"
 
 struct RepeatTileProcs {
     static unsigned X(const SkBitmapProcState&, SkFixed fx, int max) {
-        return SK_USHIFT16(((fx) & 0xFFFF) * ((max) + 1));
+        SkASSERT(max < 65535);
+        return SK_USHIFT16((unsigned)((fx) & 0xFFFF) * ((max) + 1));
     }
     static unsigned Y(const SkBitmapProcState&, SkFixed fy, int max) {
-        return SK_USHIFT16(((fy) & 0xFFFF) * ((max) + 1));
+        SkASSERT(max < 65535);
+        return SK_USHIFT16((unsigned)((fy) & 0xFFFF) * ((max) + 1));
     }
 };
 
 static SkBitmapProcState::MatrixProc RepeatX_RepeatY_Procs[] = {
     NoFilterProc_Scale<RepeatTileProcs, false>,
     RepeatX_RepeatY_filter_scale,
     NoFilterProc_Affine<RepeatTileProcs>,
     RepeatX_RepeatY_filter_affine,
     NoFilterProc_Persp<RepeatTileProcs>,
     RepeatX_RepeatY_filter_persp
@@ skipping 402 matching lines @@
     if (SkShader::kRepeat_TileMode == fTileModeX && SkShader::kRepeat_TileMode == fTileModeY) {
         return SK_ARM_NEON_WRAP(RepeatX_RepeatY_Procs)[index];
     }
 
     fTileProcX = choose_tile_proc(fTileModeX);
     fTileProcY = choose_tile_proc(fTileModeY);
     fTileLowBitsProcX = choose_tile_lowbits_proc(fTileModeX);
     fTileLowBitsProcY = choose_tile_lowbits_proc(fTileModeY);
     return GeneralXY_Procs[index];
 }