Handle large rects better.

base/numerics/saturated_arithmetic_arm.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_NUMERICS_SATURATED_ARITHMETIC_ARM_H_
 #define BASE_NUMERICS_SATURATED_ARITHMETIC_ARM_H_
 
 #include <limits>
 
 namespace base {
@@ skipping 15 matching lines @@
       : [output] "=r"(result)
       : [first] "r"(a), [second] "r"(b));
 
   return result;
 }
 
 inline int32_t SaturatedNegative(int32_t a) {
   return SaturatedSubtraction(0, a);
 }
 
+inline int32_t SaturatedAbsolute(int32_t a) {
+  if (a >= 0)
+    return a;
+  return SaturatedNegative(a);
+}
+
 inline int GetMaxSaturatedSetResultForTesting(int fractional_shift) {
   // For ARM Asm version the set function maxes out to the biggest
   // possible integer part with the fractional part zero'd out.
   // e.g. 0x7fffffc0.
   return std::numeric_limits<int>::max() & ~((1 << fractional_shift) - 1);
 }
 
 inline int GetMinSaturatedSetResultForTesting(int fractional_shift) {
   return std::numeric_limits<int>::min();
 }
@@ skipping 47 matching lines @@
       : [output] "=r"(result)
       : [value] "r"(value), [saturate] "n"(Saturate),
         [shift] "n"(fractional_shift));
 
   return result;
 }
 
 }  // namespace base
 
 #endif  // BASE_NUMERICS_SATURATED_ARITHMETIC_ARM_H_