ios fixes

src/core/SkFloatBits.cpp

Index: src/core/SkFloatBits.cpp
diff --git a/src/core/SkFloatBits.cpp b/src/core/SkFloatBits.cpp
index 39b51abf1dc8a9939c41e69463ee50a37b9b1956..5fad36122233b3dd5a6e5b86624f8a9679ebdbc7 100644
--- a/src/core/SkFloatBits.cpp
+++ b/src/core/SkFloatBits.cpp
@@ -85,7 +85,11 @@ int32_t SkFloatBits_toIntFloor(int32_t packed) {
         value = SkApplySign(value, SkExtractSign(packed));
         exp = -exp;
         if (exp > 25) {   // underflow
+#ifdef SK_BUILD_FOR_IOS
+            if (exp > 149) return 0;

[reed1, 2014/07/10 18:39:39]

Can we perhaps encapsulate this in a helper function, like handle_underflow.
Then we could #ifdef and adda  comment with a bug or test reference to help
explain why.

[caryclark, 2014/07/10 21:07:03]

I commented and gave it a platform independent #define, but it's unclear to me
how to isolate this in a helper function.

+#else
             exp = 25;
+#endif
         }
         // int add = 0;
         return value >> exp;
@@ -145,7 +149,12 @@ int32_t SkFloatBits_toIntCeil(int32_t packed) {
         value = SkApplySign(value, SkExtractSign(packed));
         exp = -exp;
         if (exp > 25) {   // underflow
+#ifdef SK_BUILD_FOR_IOS
+            if (exp > 149) return 0;
+            return 0 < value;
+#else
             exp = 25;
+#endif
         }
         int add = (1 << exp) - 1;
         return (value + add) >> exp;