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HLSL: cbuffer and tbuffer grammar and production.

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This commit is contained in:
John Kessenich
2016-07-25 16:05:33 -06:00
parent b8d2a006d1
commit 3d157c510f
9 changed files with 268 additions and 46 deletions
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53
hlsl/hlslGrammar.cpp
View File

@@ -337,6 +337,8 @@ bool HlslGrammar::acceptDeclaration(TIntermNode*& node)
if (typedefDecl)
parseContext.declareTypedef(idToken.loc, *idToken.string, type, arraySizes);
else if (type.getBasicType() == EbtBlock)
parseContext.declareBlock(idToken.loc, type, idToken.string);
else {
// Declare the variable and add any initializer code to the AST.
// The top-level node is always made into an aggregate, as that's
@@ -414,11 +416,19 @@ bool HlslGrammar::acceptFullySpecifiedType(TType& type)
TQualifier qualifier;
qualifier.clear();
acceptQualifier(qualifier);
TSourceLoc loc = token.loc;
// type_specifier
if (! acceptType(type))
return false;
type.getQualifier() = qualifier;
if (type.getBasicType() == EbtBlock) {
// the type was a block, which set some parts of the qualifier
parseContext.mergeQualifiers(loc, type.getQualifier(), qualifier, true);
// further, it can create an anonymous instance of the block
if (peekTokenClass(EHTokSemicolon))
parseContext.declareBlock(loc, type);
} else
type.getQualifier() = qualifier;
return true;
}
@@ -825,6 +835,8 @@ bool HlslGrammar::acceptType(TType& type)
break;
case EHTokStruct:
case EHTokCBuffer:
case EHTokTBuffer:
return acceptStruct(type);
break;
@@ -1186,13 +1198,29 @@ bool HlslGrammar::acceptType(TType& type)
}
// struct
// : STRUCT IDENTIFIER LEFT_BRACE struct_declaration_list RIGHT_BRACE
// | STRUCT LEFT_BRACE struct_declaration_list RIGHT_BRACE
// : struct_type IDENTIFIER post_decls LEFT_BRACE struct_declaration_list RIGHT_BRACE
// | struct_type post_decls LEFT_BRACE struct_declaration_list RIGHT_BRACE
//
// struct_type
// : STRUCT
// | CBUFFER
// | TBUFFER
//
bool HlslGrammar::acceptStruct(TType& type)
{
// This qualifier.storage will tell us whether it's an AST block or
// just a struct.
TQualifier qualifier;
qualifier.clear();
// CBUFFER
if (acceptTokenClass(EHTokCBuffer))
qualifier.storage = EvqUniform;
// TBUFFER
else if (acceptTokenClass(EHTokTBuffer))
qualifier.storage = EvqBuffer;
// STRUCT
if (! acceptTokenClass(EHTokStruct))
else if (! acceptTokenClass(EHTokStruct))
return false;
// IDENTIFIER
@@ -1202,6 +1230,9 @@ bool HlslGrammar::acceptStruct(TType& type)
advanceToken();
}
// post_decls
acceptPostDecls(type);
// LEFT_BRACE
if (! acceptTokenClass(EHTokLeftBrace)) {
expected("{");
@@ -1222,11 +1253,15 @@ bool HlslGrammar::acceptStruct(TType& type)
}
// create the user-defined type
new(&type) TType(typeList, structName);
if (qualifier.storage == EvqTemporary)
new(&type) TType(typeList, structName);
else
new(&type) TType(typeList, structName, qualifier); // sets EbtBlock
// If it was named, which means it can be reused later, add
// it to the symbol table.
if (structName.size() > 0) {
// If it was named, which means the type can be reused later, add
// it to the symbol table. (Unless it's a block, in which
// case the name is not a type.)
if (type.getBasicType() != EbtBlock && structName.size() > 0) {
TVariable* userTypeDef = new TVariable(&structName, type, true);
if (! parseContext.symbolTable.insert(*userTypeDef))
parseContext.error(token.loc, "redefinition", structName.c_str(), "struct");
@@ -2442,6 +2477,7 @@ void HlslGrammar::acceptPostDecls(TType& type)
break;
}
// TODO: process the packoffset information
// c1.y means component y of location slot 1
} else if (! acceptIdentifier(idToken)) {
expected("semantic or packoffset or register");
return;
@@ -2462,6 +2498,7 @@ void HlslGrammar::acceptPostDecls(TType& type)
break;
}
// TODO: process the register information
// b2 means buffer 2
} else {
// semantic, in idToken.string
parseContext.handleSemantic(type, *idToken.string);

70
hlsl/hlslParseHelper.cpp
View File

@@ -2533,10 +2533,10 @@ void HlslParseContext::mergeQualifiers(const TSourceLoc& loc, TQualifier& dst, c
if (dst.storage == EvqTemporary || dst.storage == EvqGlobal)
dst.storage = src.storage;
else if ((dst.storage == EvqIn && src.storage == EvqOut) ||
(dst.storage == EvqOut && src.storage == EvqIn))
(dst.storage == EvqOut && src.storage == EvqIn))
dst.storage = EvqInOut;
else if ((dst.storage == EvqIn && src.storage == EvqConst) ||
(dst.storage == EvqConst && src.storage == EvqIn))
(dst.storage == EvqConst && src.storage == EvqIn))
dst.storage = EvqConstReadOnly;
else if (src.storage != EvqTemporary && src.storage != EvqGlobal)
error(loc, "too many storage qualifiers", GetStorageQualifierString(src.storage), "");
@@ -3898,28 +3898,31 @@ TIntermTyped* HlslParseContext::constructAggregate(TIntermNode* node, const TTyp
//
// Do everything needed to add an interface block.
//
void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList, const TString* instanceName, TArraySizes* arraySizes)
void HlslParseContext::declareBlock(const TSourceLoc& loc, TType& type, const TString* instanceName, TArraySizes* arraySizes)
{
assert(type.getWritableStruct() != nullptr);
TTypeList& typeList = *type.getWritableStruct();
// fix and check for member storage qualifiers and types that don't belong within a block
for (unsigned int member = 0; member < typeList.size(); ++member) {
TType& memberType = *typeList[member].type;
TQualifier& memberQualifier = memberType.getQualifier();
const TSourceLoc& memberLoc = typeList[member].loc;
globalQualifierFix(memberLoc, memberQualifier);
memberQualifier.storage = currentBlockQualifier.storage;
memberQualifier.storage = type.getQualifier().storage;
}
// This might be a redeclaration of a built-in block. If so, redeclareBuiltinBlock() will
// do all the rest.
if (! symbolTable.atBuiltInLevel() && builtInName(*blockName)) {
redeclareBuiltinBlock(loc, typeList, *blockName, instanceName, arraySizes);
return;
}
//if (! symbolTable.atBuiltInLevel() && builtInName(*blockName)) {
// redeclareBuiltinBlock(loc, typeList, *blockName, instanceName, arraySizes);
// return;
//}
// Make default block qualification, and adjust the member qualifications
TQualifier defaultQualification;
switch (currentBlockQualifier.storage) {
switch (type.getQualifier().storage) {
case EvqUniform: defaultQualification = globalUniformDefaults; break;
case EvqBuffer: defaultQualification = globalBufferDefaults; break;
case EvqVaryingIn: defaultQualification = globalInputDefaults; break;
@@ -3929,12 +3932,12 @@ void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList,
// Special case for "push_constant uniform", which has a default of std430,
// contrary to normal uniform defaults, and can't have a default tracked for it.
if (currentBlockQualifier.layoutPushConstant && ! currentBlockQualifier.hasPacking())
currentBlockQualifier.layoutPacking = ElpStd430;
if (type.getQualifier().layoutPushConstant && ! type.getQualifier().hasPacking())
type.getQualifier().layoutPacking = ElpStd430;
// fix and check for member layout qualifiers
mergeObjectLayoutQualifiers(defaultQualification, currentBlockQualifier, true);
mergeObjectLayoutQualifiers(defaultQualification, type.getQualifier(), true);
bool memberWithLocation = false;
bool memberWithoutLocation = false;
@@ -3958,7 +3961,7 @@ void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList,
if (memberQualifier.hasPacking())
error(memberLoc, "member of block cannot have a packing layout qualifier", typeList[member].type->getFieldName().c_str(), "");
if (memberQualifier.hasLocation()) {
switch (currentBlockQualifier.storage) {
switch (type.getQualifier().storage) {
case EvqVaryingIn:
case EvqVaryingOut:
memberWithLocation = true;
@@ -3979,19 +3982,20 @@ void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList,
}
// Process the members
fixBlockLocations(loc, currentBlockQualifier, typeList, memberWithLocation, memberWithoutLocation);
fixBlockXfbOffsets(currentBlockQualifier, typeList);
fixBlockUniformOffsets(currentBlockQualifier, typeList);
fixBlockLocations(loc, type.getQualifier(), typeList, memberWithLocation, memberWithoutLocation);
fixBlockXfbOffsets(type.getQualifier(), typeList);
fixBlockUniformOffsets(type.getQualifier(), typeList);
// reverse merge, so that currentBlockQualifier now has all layout information
// (can't use defaultQualification directly, it's missing other non-layout-default-class qualifiers)
mergeObjectLayoutQualifiers(currentBlockQualifier, defaultQualification, true);
mergeObjectLayoutQualifiers(type.getQualifier(), defaultQualification, true);
//
// Build and add the interface block as a new type named 'blockName'
//
TType blockType(&typeList, *blockName, currentBlockQualifier);
//?? need the block name to be a typename?
TType blockType(&typeList, "" /* *blockName */, type.getQualifier());
if (arraySizes)
blockType.newArraySizes(*arraySizes);
@@ -4008,20 +4012,20 @@ void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList,
// whose type is EbtBlock, but without all the structure; that will come from the type
// the instances point to.
//
TType blockNameType(EbtBlock, blockType.getQualifier().storage);
TVariable* blockNameVar = new TVariable(blockName, blockNameType);
if (! symbolTable.insert(*blockNameVar)) {
TSymbol* existingName = symbolTable.find(*blockName);
if (existingName->getType().getBasicType() == EbtBlock) {
if (existingName->getType().getQualifier().storage == blockType.getQualifier().storage) {
error(loc, "Cannot reuse block name within the same interface:", blockName->c_str(), blockType.getStorageQualifierString());
return;
}
} else {
error(loc, "block name cannot redefine a non-block name", blockName->c_str(), "");
return;
}
}
//??TType blockNameType(EbtBlock, blockType.getQualifier().storage);
//??TVariable* blockNameVar = new TVariable(blockName, blockNameType);
//if (! symbolTable.insert(*blockNameVar)) {
// TSymbol* existingName = symbolTable.find(*blockName);
// if (existingName->getType().getBasicType() == EbtBlock) {
// if (existingName->getType().getQualifier().storage == blockType.getQualifier().storage) {
// error(loc, "Cannot reuse block name within the same interface:", blockName->c_str(), blockType.getStorageQualifierString());
// return;
// }
// } else {
// error(loc, "block name cannot redefine a non-block name", blockName->c_str(), "");
// return;
// }
//}
// Add the variable, as anonymous or named instanceName.
// Make an anonymous variable if no name was provided.
@@ -4031,7 +4035,7 @@ void HlslParseContext::declareBlock(const TSourceLoc& loc, TTypeList& typeList,
TVariable& variable = *new TVariable(instanceName, blockType);
if (! symbolTable.insert(variable)) {
if (*instanceName == "")
error(loc, "nameless block contains a member that already has a name at global scope", blockName->c_str(), "");
error(loc, "nameless block contains a member that already has a name at global scope", "" /* blockName->c_str() */, "");
else
error(loc, "block instance name redefinition", variable.getName().c_str(), "");

4
hlsl/hlslParseHelper.h
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@@ -133,7 +133,7 @@ public:
TIntermTyped* addConstructor(const TSourceLoc&, TIntermNode*, const TType&, TOperator);
TIntermTyped* constructAggregate(TIntermNode*, const TType&, int, const TSourceLoc&);
TIntermTyped* constructBuiltIn(const TType&, TOperator, TIntermTyped*, const TSourceLoc&, bool subset);
void declareBlock(const TSourceLoc&, TTypeList& typeList, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
void declareBlock(const TSourceLoc&, TType&, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
void fixBlockLocations(const TSourceLoc&, TQualifier&, TTypeList&, bool memberWithLocation, bool memberWithoutLocation);
void fixBlockXfbOffsets(TQualifier&, TTypeList&);
void fixBlockUniformOffsets(TQualifier&, TTypeList&);
@@ -176,8 +176,6 @@ protected:
bool postMainReturn; // if inside a function, true if the function is the entry point and this is after a return statement
const TType* currentFunctionType; // the return type of the function that's currently being parsed
bool functionReturnsValue; // true if a non-void function has a return
const TString* blockName;
TQualifier currentBlockQualifier;
TBuiltInResource resources;
TLimits& limits;

5
hlsl/hlslScanContext.cpp
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@@ -258,6 +258,8 @@ void HlslScanContext::fillInKeywordMap()
(*KeywordMap)["Texture2DMSArray"] = EHTokTexture2DMSarray;
(*KeywordMap)["struct"] = EHTokStruct;
(*KeywordMap)["cbuffer"] = EHTokCBuffer;
(*KeywordMap)["tbuffer"] = EHTokTBuffer;
(*KeywordMap)["typedef"] = EHTokTypedef;
(*KeywordMap)["true"] = EHTokBoolConstant;
@@ -574,6 +576,9 @@ EHlslTokenClass HlslScanContext::tokenizeIdentifier()
// variable, user type, ...
case EHTokStruct:
case EHTokTypedef:
case EHTokCBuffer:
case EHTokTBuffer:
return keyword;
case EHTokBoolConstant:
if (strcmp("true", tokenText) == 0)

2
hlsl/hlslTokens.h
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@@ -212,6 +212,8 @@ enum EHlslTokenClass {
EHTokIdentifier,
EHTokTypeName,
EHTokStruct,
EHTokCBuffer,
EHTokTBuffer,
EHTokTypedef,
// constant