Support for 64 bit integer types (#1191)

* * For integer literals add postfix, and use unsigned/signed output appropriately
* Extend GLSL extension handling by type, and for adding 64 bit int extensions
* Added tests for int/uint64 types

* Add explicit Int/UInt64 emit functions to avoid ambiguity.

7 files changed, 171 insertions, 29 deletions

diff --git a/source/slang/slang-emit-c-like.cpp b/source/slang/slang-emit-c-like.cpp
index 48ca6009b..c2bfad0a7 100644
--- a/source/slang/slang-emit-c-like.cpp
+++ b/source/slang/slang-emit-c-like.cpp
@@ -743,8 +743,51 @@ void CLikeSourceEmitter::emitSimpleValueImpl(IRInst* inst)
     switch(inst->op)
     {
     case kIROp_IntLit:
-        m_writer->emit(((IRConstant*) inst)->value.intVal);
+    {
+        auto litInst = static_cast<IRConstant*>(inst);
+
+        IRBasicType* type = as<IRBasicType>(inst->getDataType());
+        if (type)
+        {
+            switch (type->getBaseType())
+            {
+                default:
+                case BaseType::Int8:
+                case BaseType::Int16:
+                case BaseType::Int:
+                {
+                    m_writer->emit(litInst->value.intVal);
+                    break;
+                }
+                case BaseType::UInt8:
+                case BaseType::UInt16:
+                case BaseType::UInt:
+                {
+                    m_writer->emit(UInt(litInst->value.intVal));
+                    break;
+                }
+                case BaseType::Int64:
+                {
+                    m_writer->emitInt64(int64_t(litInst->value.intVal));
+                    m_writer->emit("ll");
+                    break;
+                }
+                case BaseType::UInt64:
+                {
+                    SLANG_COMPILE_TIME_ASSERT(sizeof(litInst->value.intVal) >= sizeof(uint64_t));
+                    m_writer->emitUInt64(uint64_t(litInst->value.intVal));
+                    m_writer->emit("ull");
+                    break;
+                }
+            }
+        }
+        else
+        {
+            // If no type... just output what we have
+            m_writer->emit(litInst->value.intVal);
+        }
         break;
+    }
 
     case kIROp_FloatLit:
         m_writer->emit(((IRConstant*) inst)->value.floatVal);
diff --git a/source/slang/slang-emit-glsl-extension-tracker.cpp b/source/slang/slang-emit-glsl-extension-tracker.cpp
index c162f2f46..e1bbb3e46 100644
--- a/source/slang/slang-emit-glsl-extension-tracker.cpp
+++ b/source/slang/slang-emit-glsl-extension-tracker.cpp
@@ -26,18 +26,35 @@ void GLSLExtensionTracker::requireVersion(ProfileVersion version)
     }
 }
 
-void GLSLExtensionTracker::requireHalfExtension()
+void GLSLExtensionTracker::requireBaseTypeExtension(BaseType baseType)
 {
-    if (!m_hasHalfExtension)
+    uint32_t bit = 1 << int(baseType);
+    if (m_hasBaseTypeFlags & bit)
     {
-        // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_16bit_storage.txt
-        requireExtension("GL_EXT_shader_16bit_storage");
-
-        // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_explicit_arithmetic_types.txt
-        requireExtension("GL_EXT_shader_explicit_arithmetic_types");
+        return;
+    }
 
-        m_hasHalfExtension = true;
+    switch (baseType)
+    {
+        case BaseType::Half:
+        {
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_16bit_storage.txt
+            requireExtension("GL_EXT_shader_16bit_storage");
+
+            // https://github.com/KhronosGroup/GLSL/blob/master/extensions/ext/GL_EXT_shader_explicit_arithmetic_types.txt
+            requireExtension("GL_EXT_shader_explicit_arithmetic_types");
+            break;
+        }
+        case BaseType::UInt64:
+        case BaseType::Int64:
+        {
+            requireExtension("GL_EXT_shader_explicit_arithmetic_types_int64");
+            m_hasBaseTypeFlags |= _getFlag(BaseType::UInt64) | _getFlag(BaseType::Int64);
+            break;
+        }
     }
+
+    m_hasBaseTypeFlags |= bit;
 }
 
 
diff --git a/source/slang/slang-emit-glsl-extension-tracker.h b/source/slang/slang-emit-glsl-extension-tracker.h
index 3ba226fbc..806e430e8 100644
--- a/source/slang/slang-emit-glsl-extension-tracker.h
+++ b/source/slang/slang-emit-glsl-extension-tracker.h
@@ -15,7 +15,7 @@ public:
 
     void requireExtension(const String& name);
     void requireVersion(ProfileVersion version);
-    void requireHalfExtension();
+    void requireBaseTypeExtension(BaseType baseType);
 
     ProfileVersion getRequiredProfileVersion() const { return m_profileVersion; }
     const StringBuilder& getExtensionRequireLines() const { return m_extensionRequireLines; }
@@ -27,7 +27,9 @@ protected:
 
     ProfileVersion m_profileVersion = ProfileVersion::GLSL_110;
 
-    bool m_hasHalfExtension = false;
+    static uint32_t _getFlag(BaseType baseType) { return uint32_t(1) << int(baseType); }
+
+    uint32_t m_hasBaseTypeFlags = 0xffffffff & ~(_getFlag(BaseType::UInt64) + _getFlag(BaseType::Int64) + _getFlag(BaseType::Half)); 
 };
 
 }
diff --git a/source/slang/slang-emit-glsl.cpp b/source/slang/slang-emit-glsl.cpp
index 4aae8376c..c319f44e9 100644
--- a/source/slang/slang-emit-glsl.cpp
+++ b/source/slang/slang-emit-glsl.cpp
@@ -583,18 +583,29 @@ void GLSLSourceEmitter::_emitGLSLTypePrefix(IRType* type, bool promoteHalfToFloa
         case kIROp_Int8Type:    m_writer->emit("i8");     break;
         case kIROp_Int16Type:   m_writer->emit("i16");    break;
         case kIROp_IntType:     m_writer->emit("i");      break;
-        case kIROp_Int64Type:   m_writer->emit("i64");    break;
+        case kIROp_Int64Type:   
+        {
+            _requireBaseType(BaseType::Int64);
+            m_writer->emit("i64");
+            break;
+        }
 
         case kIROp_UInt8Type:   m_writer->emit("u8");     break;
         case kIROp_UInt16Type:  m_writer->emit("u16");    break;
         case kIROp_UIntType:    m_writer->emit("u");      break;
-        case kIROp_UInt64Type:  m_writer->emit("u64");    break;
+
+        case kIROp_UInt64Type:
+        {
+            _requireBaseType(BaseType::UInt64);
+            m_writer->emit("u64");
+            break;
+        }
 
         case kIROp_BoolType:    m_writer->emit("b");		break;
 
         case kIROp_HalfType:
         {
-            _requireHalf();
+            _requireBaseType(BaseType::Half);
             if (promoteHalfToFloat)
             {
                 // no prefix
@@ -621,9 +632,9 @@ void GLSLSourceEmitter::_emitGLSLTypePrefix(IRType* type, bool promoteHalfToFloa
     }
 }
 
-void GLSLSourceEmitter::_requireHalf()
+void GLSLSourceEmitter::_requireBaseType(BaseType baseType)
 {
-    m_glslExtensionTracker.requireHalfExtension();
+    m_glslExtensionTracker.requireBaseTypeExtension(baseType);
 }
 
 void GLSLSourceEmitter::_maybeEmitGLSLFlatModifier(IRType* valueType)
@@ -647,6 +658,44 @@ void GLSLSourceEmitter::_maybeEmitGLSLFlatModifier(IRType* valueType)
     }
 }
 
+void GLSLSourceEmitter::emitSimpleValueImpl(IRInst* inst) 
+{
+    switch (inst->op)
+    {
+        case kIROp_IntLit:
+        {
+            auto litInst = static_cast<IRConstant*>(inst);
+
+            IRBasicType* type = as<IRBasicType>(inst->getDataType());
+            if (type)
+            {
+                switch (type->getBaseType())
+                {
+                    default: break;
+                    case BaseType::Int64:
+                    {
+                        m_writer->emitInt64(int64_t(litInst->value.intVal));
+                        m_writer->emit("l");
+                        return;
+                    }
+                    case BaseType::UInt64:
+                    {
+                        SLANG_COMPILE_TIME_ASSERT(sizeof(litInst->value.intVal) >= sizeof(uint64_t));
+                        m_writer->emitUInt64(uint64_t(litInst->value.intVal));
+                        m_writer->emit("ul");
+                        return;
+                    }
+                }
+            }
+            break;   
+        }
+        default: break;
+    }
+
+    Super::emitSimpleValueImpl(inst);
+}
+
+
 void GLSLSourceEmitter::emitParameterGroupImpl(IRGlobalParam* varDecl, IRUniformParameterGroupType* type)
 {
     _emitGLSLParameterGroup(varDecl, type);
@@ -1317,16 +1366,26 @@ void GLSLSourceEmitter::emitSimpleTypeImpl(IRType* type)
 {
     switch (type->op)
     {
-        case kIROp_VoidType:   
-        case kIROp_BoolType:   
-        case kIROp_Int8Type:   
-        case kIROp_Int16Type:  
-        case kIROp_IntType:    
-        case kIROp_Int64Type:  
-        case kIROp_UInt8Type:  
-        case kIROp_UInt16Type: 
-        case kIROp_UIntType:   
-        case kIROp_UInt64Type: 
+        case kIROp_Int64Type:
+        {
+            _requireBaseType(BaseType::Int64);
+            m_writer->emit(getDefaultBuiltinTypeName(type->op));
+            return;
+        }
+        case kIROp_UInt64Type:
+        {
+            _requireBaseType(BaseType::UInt64);
+            m_writer->emit(getDefaultBuiltinTypeName(type->op));
+            return;
+        }
+        case kIROp_VoidType:
+        case kIROp_BoolType:
+        case kIROp_Int8Type:
+        case kIROp_Int16Type:
+        case kIROp_IntType:
+        case kIROp_UInt8Type:
+        case kIROp_UInt16Type:
+        case kIROp_UIntType:
         case kIROp_FloatType:   
         case kIROp_DoubleType:
         {
@@ -1335,11 +1394,10 @@ void GLSLSourceEmitter::emitSimpleTypeImpl(IRType* type)
         }
         case kIROp_HalfType:
         {
-            _requireHalf();
+            _requireBaseType(BaseType::Half);
             m_writer->emit("float16_t");
             return;
         }
-
         case kIROp_StructType:
             m_writer->emit(getName(type));
             return;
diff --git a/source/slang/slang-emit-glsl.h b/source/slang/slang-emit-glsl.h
index bbb9c132a..37d4054e9 100644
--- a/source/slang/slang-emit-glsl.h
+++ b/source/slang/slang-emit-glsl.h
@@ -40,6 +40,9 @@ protected:
     virtual bool tryEmitGlobalParamImpl(IRGlobalParam* varDecl, IRType* varType) SLANG_OVERRIDE;
     virtual bool tryEmitInstExprImpl(IRInst* inst, const EmitOpInfo& inOuterPrec) SLANG_OVERRIDE;
 
+    virtual void emitSimpleValueImpl(IRInst* inst) SLANG_OVERRIDE;
+
+
     void _emitGLSLTextureOrTextureSamplerType(IRTextureTypeBase* type, char const* baseName);
     void _emitGLSLStructuredBuffer(IRGlobalParam* varDecl, IRHLSLStructuredBufferTypeBase* structuredBufferType);
 
@@ -62,7 +65,8 @@ protected:
         // of the variable is an integer type.
     void _maybeEmitGLSLFlatModifier(IRType* valueType);
 
-    void _requireHalf();
+    void _requireBaseType(BaseType baseType);
+
     void _maybeEmitGLSLCast(IRType* castType, IRInst* inst);
 };
 
diff --git a/source/slang/slang-emit-source-writer.cpp b/source/slang/slang-emit-source-writer.cpp
index 5661a48bb..8deecc846 100644
--- a/source/slang/slang-emit-source-writer.cpp
+++ b/source/slang/slang-emit-source-writer.cpp
@@ -197,6 +197,20 @@ void SourceWriter::emit(UInt value)
     emit(buffer);
 }
 
+void SourceWriter::emitUInt64(uint64_t value)
+{
+    char buffer[32];
+    sprintf(buffer, "%llu", (unsigned long long)(value));
+    emit(buffer);
+}
+
+void SourceWriter::emitInt64(int64_t value)
+{
+    char buffer[32];
+    sprintf(buffer, "%lld", (long long int)value);
+    emit(buffer);
+}
+
 void SourceWriter::emit(int value)
 {
     char buffer[16];
diff --git a/source/slang/slang-emit-source-writer.h b/source/slang/slang-emit-source-writer.h
index cc9fa1611..dfaf40b31 100644
--- a/source/slang/slang-emit-source-writer.h
+++ b/source/slang/slang-emit-source-writer.h
@@ -31,6 +31,10 @@ public:
     void emit(const NameLoc& nameAndLoc);
     void emit(const StringSliceLoc& nameAndLoc);
     void emit(IntegerLiteralValue value);
+
+    void emitUInt64(uint64_t value);
+    void emitInt64(int64_t value);
+
     void emit(UInt value);
     void emit(int value);
     void emit(double value);