Improvements around hashing (#1355)

* Fields from upper to lower case in slang-ast-decl.h

* Lower camel field names in slang-ast-stmt.h

* Fix fields in slang-ast-expr.h

* slang-ast-type.h make fields lowerCamel.

* slang-ast-base.h members functions lowerCamel.

* Method names in slang-ast-type.h to lowerCamel.

* GetCanonicalType -> getCanonicalType

* Substitute -> substitute

* Equals -> equals
ToString -> toString

* ParentDecl -> parentDecl
Members -> members

* * Make hash code types explicit
* Use HashCode as return type of GetHashCode
* Added conversion from double to int64_t
* Split Stable from other hash functions

* toHash32/64 to convert a HashCode to the other styles.
GetHashCode32/64 -> getHashCode32/64
GetStableHashCode32/64 -> getStableHashCode32/64

* Other Get/Stable/HashCode32/64 fixes

* GetHashCode -> getHashCode

* Equals -> equals

* CreateCanonicalType -> createCanonicalType

* Catches of polymorphic types should be through references otherwise slicing can occur.

* Fixes for newer verison of gcc.
Fix hashing problem on gcc for Dictionary.

* Another fix for GetHashPos

* Fix signed issue around GetHashPos

1 files changed, 18 insertions, 3 deletions

diff --git a/source/core/slang-math.h b/source/core/slang-math.h
index 7d3a741a4..2378b73a0 100644
--- a/source/core/slang-math.h
+++ b/source/core/slang-math.h
@@ -21,10 +21,16 @@ namespace Slang
             float fvalue;
             int ivalue;
 
-            inline static FloatIntUnion makeFromInt(int i) { FloatIntUnion cast; cast.ivalue = i; return cast; }
-            inline static FloatIntUnion makeFromFloat(float f) { FloatIntUnion cast; cast.fvalue = f; return cast; }
+            SLANG_FORCE_INLINE static FloatIntUnion makeFromInt(int i) { FloatIntUnion cast; cast.ivalue = i; return cast; }
+            SLANG_FORCE_INLINE static FloatIntUnion makeFromFloat(float f) { FloatIntUnion cast; cast.fvalue = f; return cast; }
+        };
+        union DoubleInt64Union
+        {
+            double dvalue;
+            int64_t ivalue;
+            SLANG_FORCE_INLINE static DoubleInt64Union makeFromInt64(int64_t i) { DoubleInt64Union cast; cast.ivalue = i; return cast; }
+            SLANG_FORCE_INLINE static DoubleInt64Union makeFromDouble(double d) { DoubleInt64Union cast; cast.dvalue = d; return cast; }
         };
-
         
 		static const float Pi;
 
@@ -171,6 +177,15 @@ namespace Slang
         return Math::FloatIntUnion::makeFromInt(val).fvalue; 
 	}
 
+    SLANG_FORCE_INLINE int64_t DoubleAsInt64(double val)
+    {
+        return Math::DoubleInt64Union::makeFromDouble(val).ivalue;
+    }
+    SLANG_FORCE_INLINE double Int64AsDouble(int64_t value)
+    {
+        return Math::DoubleInt64Union::makeFromInt64(value).dvalue;
+    }
+
 	inline unsigned short FloatToHalf(float val)
 	{
         const auto x = FloatAsInt(val);