ARM: add AArch32 support and new vcvt instructions

src/arm/constants-arm.h

Index: src/arm/constants-arm.h
diff --git a/src/arm/constants-arm.h b/src/arm/constants-arm.h
index 0847ea17cacaacc3bd27686186eb37df7bc9fe19..2f4ac16fc5b43d318315413b762692b5f34f7e38 100644
--- a/src/arm/constants-arm.h
+++ b/src/arm/constants-arm.h
@@ -356,6 +356,20 @@ enum VFPConversionMode {
   kDefaultRoundToZero = 1
 };
 
+enum VCVTRoundingMode {
+  kVcvtTiesToAway = 0,
+  kVcvtTiesToEven = 1,
+  kVcvtTowardPlusInfinity = 2,
+  kVcvtTowardMinusInfinity = 3
+};
+
+
+enum VCVTDataType {
+  kVcvtUnsigned = 0,
+  kVcvtSigned = 1
+};
+
+
 // This mask does not include the "inexact" or "input denormal" cumulative
 // exceptions flags, because we usually don't want to check for it.
 const uint32_t kVFPExceptionMask = 0xf;