Implement int32 TypeRecordingBinaryOp on ARM.

src/arm/constants-arm.h

Index: src/arm/constants-arm.h
===================================================================
--- src/arm/constants-arm.h	(revision 6953)
+++ src/arm/constants-arm.h	(working copy)
@@ -385,7 +385,10 @@
   kDefaultRoundToZero = 1
 };
 
+// This mask does not include the "inexact" or "input denormal" cumulative
+// exceptions flags, because we usually don't want to check for it.
 static const uint32_t kVFPExceptionMask = 0xf;
+static const uint32_t kVFPInexactExceptionBit = 1 << 4;
 static const uint32_t kVFPFlushToZeroMask = 1 << 24;
 static const uint32_t kVFPInvalidExceptionBit = 1;
 
@@ -411,6 +414,11 @@
 
 static const uint32_t kVFPRoundingModeMask = 3 << 22;
 
+enum CheckForInexactConversion {
+  kCheckForInexactConversion,
+  kDontCheckForInexactConversion
+};
+
 // -----------------------------------------------------------------------------
 // Hints.