Implement extension GL_AMD_gpu_shader_int16

- Add int16 types (int16_t, uint16_t, i16vec, u16vec).
- Add int16 support to GLSL operators.
- Add int16 type conversions (to int16, from int16).
- Add int16 built-in functions.

glslang/Include/BaseTypes.h

@@ -53,6 +53,10 @@ enum TBasicType {
     EbtUint,
     EbtInt64,
     EbtUint64,
+#ifdef AMD_EXTENSIONS
+    EbtInt16,
+    EbtUint16,
+#endif
     EbtBool,
     EbtAtomicUint,
     EbtSampler,

glslang/Include/Types.h

@@ -190,8 +190,6 @@ struct TSampler {   // misnomer now; includes images, textures without sampler,
         case EbtFloat:               break;
         case EbtInt:  s.append("i"); break;
         case EbtUint: s.append("u"); break;
-        case EbtInt64:  s.append("i64"); break;
-        case EbtUint64: s.append("u64"); break;
         default:  break;  // some compilers want this
         }
         if (image) {
@@ -1448,6 +1446,10 @@ public:
             case EbtUint:
             case EbtInt64:
             case EbtUint64:
+#ifdef AMD_EXTENSIONS
+            case EbtInt16:
+            case EbtUint16:
+#endif
             case EbtBool:
             return true;
             default:
@@ -1531,6 +1533,10 @@ public:
         case EbtUint:              return "uint";
         case EbtInt64:             return "int64_t";
         case EbtUint64:            return "uint64_t";
+#ifdef AMD_EXTENSIONS
+        case EbtInt16:             return "int16_t";
+        case EbtUint16:            return "uint16_t";
+#endif
         case EbtBool:              return "bool";
         case EbtAtomicUint:        return "atomic_uint";
         case EbtSampler:           return "sampler/image";

glslang/Include/intermediate.h

@@ -141,6 +141,42 @@ enum TOperator {
     EOpConvFloat16ToDouble,
     EOpConvFloat16ToInt64,
     EOpConvFloat16ToUint64,
+
+    EOpConvBoolToInt16,
+    EOpConvIntToInt16,
+    EOpConvUintToInt16,
+    EOpConvFloatToInt16,
+    EOpConvDoubleToInt16,
+    EOpConvFloat16ToInt16,
+    EOpConvInt64ToInt16,
+    EOpConvUint64ToInt16,
+    EOpConvUint16ToInt16,
+    EOpConvInt16ToBool,
+    EOpConvInt16ToInt,
+    EOpConvInt16ToUint,
+    EOpConvInt16ToFloat,
+    EOpConvInt16ToDouble,
+    EOpConvInt16ToFloat16,
+    EOpConvInt16ToInt64,
+    EOpConvInt16ToUint64,
+
+    EOpConvBoolToUint16,
+    EOpConvIntToUint16,
+    EOpConvUintToUint16,
+    EOpConvFloatToUint16,
+    EOpConvDoubleToUint16,
+    EOpConvFloat16ToUint16,
+    EOpConvInt64ToUint16,
+    EOpConvUint64ToUint16,
+    EOpConvInt16ToUint16,
+    EOpConvUint16ToBool,
+    EOpConvUint16ToInt,
+    EOpConvUint16ToUint,
+    EOpConvUint16ToFloat,
+    EOpConvUint16ToDouble,
+    EOpConvUint16ToFloat16,
+    EOpConvUint16ToInt64,
+    EOpConvUint16ToUint64,
 #endif
 
     //
@@ -244,6 +280,12 @@ enum TOperator {
     EOpDoubleBitsToUint64,
     EOpInt64BitsToDouble,
     EOpUint64BitsToDouble,
+#ifdef AMD_EXTENSIONS
+    EOpFloat16BitsToInt16,
+    EOpFloat16BitsToUint16,
+    EOpInt16BitsToFloat16,
+    EOpUint16BitsToFloat16,
+#endif
     EOpPackSnorm2x16,
     EOpUnpackSnorm2x16,
     EOpPackUnorm2x16,
@@ -263,6 +305,14 @@ enum TOperator {
 #ifdef AMD_EXTENSIONS
     EOpPackFloat2x16,
     EOpUnpackFloat2x16,
+    EOpPackInt2x16,
+    EOpUnpackInt2x16,
+    EOpPackUint2x16,
+    EOpUnpackUint2x16,
+    EOpPackInt4x16,
+    EOpUnpackInt4x16,
+    EOpPackUint4x16,
+    EOpUnpackUint4x16,
 #endif
 
     EOpLength,
@@ -394,15 +444,27 @@ enum TOperator {
     EOpConstructUint,
     EOpConstructInt64,
     EOpConstructUint64,
+#ifdef AMD_EXTENSIONS
+    EOpConstructInt16,
+    EOpConstructUint16,
+#endif
     EOpConstructBool,
     EOpConstructFloat,
     EOpConstructDouble,
+#ifdef AMD_EXTENSIONS
+    EOpConstructFloat16,
+#endif
     EOpConstructVec2,
     EOpConstructVec3,
     EOpConstructVec4,
     EOpConstructDVec2,
     EOpConstructDVec3,
     EOpConstructDVec4,
+#ifdef AMD_EXTENSIONS
+    EOpConstructF16Vec2,
+    EOpConstructF16Vec3,
+    EOpConstructF16Vec4,
+#endif
     EOpConstructBVec2,
     EOpConstructBVec3,
     EOpConstructBVec4,
@@ -418,6 +480,14 @@ enum TOperator {
     EOpConstructU64Vec2,
     EOpConstructU64Vec3,
     EOpConstructU64Vec4,
+#ifdef AMD_EXTENSIONS
+    EOpConstructI16Vec2,
+    EOpConstructI16Vec3,
+    EOpConstructI16Vec4,
+    EOpConstructU16Vec2,
+    EOpConstructU16Vec3,
+    EOpConstructU16Vec4,
+#endif
     EOpConstructMat2x2,
     EOpConstructMat2x3,
     EOpConstructMat2x4,
@@ -464,10 +534,6 @@ enum TOperator {
     EOpConstructBMat4x3,
     EOpConstructBMat4x4,
 #ifdef AMD_EXTENSIONS
-    EOpConstructFloat16,
-    EOpConstructF16Vec2,
-    EOpConstructF16Vec3,
-    EOpConstructF16Vec4,
     EOpConstructF16Mat2x2,
     EOpConstructF16Mat2x3,
     EOpConstructF16Mat2x4,