10#include "slang/ast/SystemSubroutine.h"
11#include "slang/syntax/AllSyntax.h"
14using namespace ImportVerilog;
19 if (svint.hasUnknown()) {
20 unsigned numWords = svint.getNumWords() / 2;
21 auto value = ArrayRef<uint64_t>(svint.getRawPtr(), numWords);
22 auto unknown = ArrayRef<uint64_t>(svint.getRawPtr() + numWords, numWords);
23 return FVInt(APInt(svint.getBitWidth(), value),
24 APInt(svint.getBitWidth(), unknown));
26 auto value = ArrayRef<uint64_t>(svint.getRawPtr(), svint.getNumWords());
27 return FVInt(APInt(svint.getBitWidth(), value));
32struct RvalueExprVisitor {
37 RvalueExprVisitor(
Context &context, Location loc)
38 : context(context), loc(loc), builder(context.builder) {}
41 Value visit(
const slang::ast::LValueReferenceExpression &expr) {
44 return builder.create<moore::ReadOp>(loc, lvalue);
48 Value visit(
const slang::ast::NamedValueExpression &expr) {
49 if (
auto value = context.
valueSymbols.lookup(&expr.symbol)) {
50 if (isa<moore::RefType>(value.getType())) {
51 auto readOp = builder.create<moore::ReadOp>(loc, value);
54 value = readOp.getResult();
66 auto d = mlir::emitError(loc,
"unknown name `") << expr.symbol.name <<
"`";
68 <<
"no rvalue generated for " << slang::ast::toString(expr.symbol.kind);
73 Value visit(
const slang::ast::HierarchicalValueExpression &expr) {
75 if (
auto value = context.
valueSymbols.lookup(&expr.symbol)) {
76 if (isa<moore::RefType>(value.getType())) {
77 auto readOp = builder.create<moore::ReadOp>(hierLoc, value);
80 value = readOp.getResult();
87 auto d = mlir::emitError(loc,
"unknown hierarchical name `")
88 << expr.symbol.name <<
"`";
89 d.attachNote(hierLoc) <<
"no rvalue generated for "
90 << slang::ast::toString(expr.symbol.kind);
95 Value visit(
const slang::ast::ConversionExpression &expr) {
103 Value visit(
const slang::ast::AssignmentExpression &expr) {
110 expr.right(), cast<moore::RefType>(lhs.getType()).getNestedType());
115 if (expr.timingControl) {
117 mlir::emitError(loc,
"delayed assignments not supported");
121 if (expr.isNonBlocking())
122 builder.create<moore::NonBlockingAssignOp>(loc, lhs, rhs);
124 builder.create<moore::BlockingAssignOp>(loc, lhs, rhs);
130 template <
class ConcreteOp>
131 Value createReduction(Value arg,
bool invert) {
135 Value result = builder.create<ConcreteOp>(loc, arg);
137 result = builder.create<moore::NotOp>(loc, result);
142 Value createIncrement(Value arg,
bool isInc,
bool isPost) {
143 auto preValue = builder.create<moore::ReadOp>(loc, arg);
144 auto one = builder.create<moore::ConstantOp>(
145 loc, cast<moore::IntType>(preValue.getType()), 1);
147 isInc ? builder.create<moore::AddOp>(loc, preValue, one).getResult()
148 : builder.create<moore::SubOp>(loc, preValue, one).getResult();
149 builder.create<moore::BlockingAssignOp>(loc, arg, postValue);
156 Value visit(
const slang::ast::UnaryExpression &expr) {
157 using slang::ast::UnaryOperator;
159 if (expr.op == UnaryOperator::Preincrement ||
160 expr.op == UnaryOperator::Predecrement ||
161 expr.op == UnaryOperator::Postincrement ||
162 expr.op == UnaryOperator::Postdecrement)
172 case UnaryOperator::Plus:
175 case UnaryOperator::Minus:
179 return builder.create<moore::NegOp>(loc, arg);
181 case UnaryOperator::BitwiseNot:
185 return builder.create<moore::NotOp>(loc, arg);
187 case UnaryOperator::BitwiseAnd:
188 return createReduction<moore::ReduceAndOp>(arg,
false);
189 case UnaryOperator::BitwiseOr:
190 return createReduction<moore::ReduceOrOp>(arg,
false);
191 case UnaryOperator::BitwiseXor:
192 return createReduction<moore::ReduceXorOp>(arg,
false);
193 case UnaryOperator::BitwiseNand:
194 return createReduction<moore::ReduceAndOp>(arg,
true);
195 case UnaryOperator::BitwiseNor:
196 return createReduction<moore::ReduceOrOp>(arg,
true);
197 case UnaryOperator::BitwiseXnor:
198 return createReduction<moore::ReduceXorOp>(arg,
true);
200 case UnaryOperator::LogicalNot:
204 return builder.create<moore::NotOp>(loc, arg);
206 case UnaryOperator::Preincrement:
207 return createIncrement(arg,
true,
false);
208 case UnaryOperator::Predecrement:
209 return createIncrement(arg,
false,
false);
210 case UnaryOperator::Postincrement:
211 return createIncrement(arg,
true,
true);
212 case UnaryOperator::Postdecrement:
213 return createIncrement(arg,
false,
true);
216 mlir::emitError(loc,
"unsupported unary operator");
222 template <
class ConcreteOp>
223 Value createBinary(Value lhs, Value rhs) {
230 return builder.create<ConcreteOp>(loc, lhs, rhs);
234 Value visit(
const slang::ast::BinaryExpression &expr) {
243 Domain domain = Domain::TwoValued;
244 if (expr.type->isFourState() || expr.left().type->isFourState() ||
245 expr.right().type->isFourState())
246 domain = Domain::FourValued;
248 using slang::ast::BinaryOperator;
250 case BinaryOperator::Add:
251 return createBinary<moore::AddOp>(lhs, rhs);
252 case BinaryOperator::Subtract:
253 return createBinary<moore::SubOp>(lhs, rhs);
254 case BinaryOperator::Multiply:
255 return createBinary<moore::MulOp>(lhs, rhs);
256 case BinaryOperator::Divide:
257 if (expr.type->isSigned())
258 return createBinary<moore::DivSOp>(lhs, rhs);
260 return createBinary<moore::DivUOp>(lhs, rhs);
261 case BinaryOperator::Mod:
262 if (expr.type->isSigned())
263 return createBinary<moore::ModSOp>(lhs, rhs);
265 return createBinary<moore::ModUOp>(lhs, rhs);
266 case BinaryOperator::Power: {
272 builder.create<moore::ConversionOp>(loc, lhs.getType(), rhs);
273 if (expr.type->isSigned())
274 return createBinary<moore::PowSOp>(lhs, rhsCast);
276 return createBinary<moore::PowUOp>(lhs, rhsCast);
279 case BinaryOperator::BinaryAnd:
280 return createBinary<moore::AndOp>(lhs, rhs);
281 case BinaryOperator::BinaryOr:
282 return createBinary<moore::OrOp>(lhs, rhs);
283 case BinaryOperator::BinaryXor:
284 return createBinary<moore::XorOp>(lhs, rhs);
285 case BinaryOperator::BinaryXnor: {
286 auto result = createBinary<moore::XorOp>(lhs, rhs);
289 return builder.create<moore::NotOp>(loc, result);
292 case BinaryOperator::Equality:
293 return createBinary<moore::EqOp>(lhs, rhs);
294 case BinaryOperator::Inequality:
295 return createBinary<moore::NeOp>(lhs, rhs);
296 case BinaryOperator::CaseEquality:
297 return createBinary<moore::CaseEqOp>(lhs, rhs);
298 case BinaryOperator::CaseInequality:
299 return createBinary<moore::CaseNeOp>(lhs, rhs);
300 case BinaryOperator::WildcardEquality:
301 return createBinary<moore::WildcardEqOp>(lhs, rhs);
302 case BinaryOperator::WildcardInequality:
303 return createBinary<moore::WildcardNeOp>(lhs, rhs);
305 case BinaryOperator::GreaterThanEqual:
306 if (expr.left().type->isSigned())
307 return createBinary<moore::SgeOp>(lhs, rhs);
309 return createBinary<moore::UgeOp>(lhs, rhs);
310 case BinaryOperator::GreaterThan:
311 if (expr.left().type->isSigned())
312 return createBinary<moore::SgtOp>(lhs, rhs);
314 return createBinary<moore::UgtOp>(lhs, rhs);
315 case BinaryOperator::LessThanEqual:
316 if (expr.left().type->isSigned())
317 return createBinary<moore::SleOp>(lhs, rhs);
319 return createBinary<moore::UleOp>(lhs, rhs);
320 case BinaryOperator::LessThan:
321 if (expr.left().type->isSigned())
322 return createBinary<moore::SltOp>(lhs, rhs);
324 return createBinary<moore::UltOp>(lhs, rhs);
327 case BinaryOperator::LogicalAnd: {
336 return builder.create<moore::AndOp>(loc, lhs, rhs);
338 case BinaryOperator::LogicalOr: {
347 return builder.create<moore::OrOp>(loc, lhs, rhs);
349 case BinaryOperator::LogicalImplication: {
357 auto notLHS = builder.create<moore::NotOp>(loc, lhs);
358 return builder.create<moore::OrOp>(loc, notLHS, rhs);
360 case BinaryOperator::LogicalEquivalence: {
368 auto notLHS = builder.create<moore::NotOp>(loc, lhs);
369 auto notRHS = builder.create<moore::NotOp>(loc, rhs);
370 auto both = builder.create<moore::AndOp>(loc, lhs, rhs);
371 auto notBoth = builder.create<moore::AndOp>(loc, notLHS, notRHS);
372 return builder.create<moore::OrOp>(loc, both, notBoth);
375 case BinaryOperator::LogicalShiftLeft:
376 return createBinary<moore::ShlOp>(lhs, rhs);
377 case BinaryOperator::LogicalShiftRight:
378 return createBinary<moore::ShrOp>(lhs, rhs);
379 case BinaryOperator::ArithmeticShiftLeft:
380 return createBinary<moore::ShlOp>(lhs, rhs);
381 case BinaryOperator::ArithmeticShiftRight: {
388 if (expr.type->isSigned())
389 return builder.create<moore::AShrOp>(loc, lhs, rhs);
390 return builder.create<moore::ShrOp>(loc, lhs, rhs);
394 mlir::emitError(loc,
"unsupported binary operator");
399 Value visit(
const slang::ast::UnbasedUnsizedIntegerLiteral &expr) {
404 Value visit(
const slang::ast::IntegerLiteral &expr) {
409 Value visit(
const slang::ast::ConcatenationExpression &expr) {
410 SmallVector<Value> operands;
411 for (
auto *operand : expr.operands()) {
415 if (operand->type->isVoid())
421 operands.push_back(value);
423 return builder.create<moore::ConcatOp>(loc, operands);
427 Value visit(
const slang::ast::ReplicationExpression &expr) {
432 return builder.create<moore::ReplicateOp>(loc, type, value);
435 Value getSelectIndex(Value index,
const slang::ConstantRange &range)
const {
436 auto indexType = cast<moore::UnpackedType>(index.getType());
437 auto bw = std::max(llvm::Log2_32_Ceil(std::max(std::abs(range.lower()),
438 std::abs(range.upper()))),
439 indexType.getBitSize().value());
441 moore::IntType::get(index.getContext(), bw, indexType.getDomain());
443 if (range.isLittleEndian()) {
444 if (range.lower() == 0)
448 builder.createOrFold<moore::ConversionOp>(loc, intType, index);
449 Value offset = builder.create<moore::ConstantOp>(
450 loc, intType, range.lower(), range.lower() < 0);
451 return builder.createOrFold<moore::SubOp>(loc, newIndex, offset);
454 if (range.upper() == 0)
455 return builder.createOrFold<moore::NegOp>(loc, index);
458 builder.createOrFold<moore::ConversionOp>(loc, intType, index);
459 Value offset = builder.create<moore::ConstantOp>(
460 loc, intType, range.upper(), range.upper() < 0);
461 return builder.createOrFold<moore::SubOp>(loc, offset, newIndex);
465 Value visit(
const slang::ast::ElementSelectExpression &expr) {
470 auto range = expr.value().type->getFixedRange();
471 if (
auto *constValue = expr.selector().constant) {
472 assert(!constValue->hasUnknown());
473 assert(constValue->size() <= 32);
475 auto lowBit = constValue->integer().as<uint32_t>().value();
476 return builder.create<moore::ExtractOp>(loc, type, value,
477 range.translateIndex(lowBit));
482 return builder.create<moore::DynExtractOp>(loc, type, value,
483 getSelectIndex(lowBit, range));
487 Value visit(
const slang::ast::RangeSelectExpression &expr) {
494 uint32_t constLowBit;
495 auto *leftConst = expr.left().constant;
496 auto *rightConst = expr.right().constant;
498 assert(!leftConst->hasUnknown());
499 assert(leftConst->size() <= 32);
502 assert(!rightConst->hasUnknown());
503 assert(rightConst->size() <= 32);
506 if (expr.getSelectionKind() == slang::ast::RangeSelectionKind::Simple) {
507 if (leftConst && rightConst) {
509 auto lhs = leftConst->integer().as<uint32_t>().value();
510 auto rhs = rightConst->integer().as<uint32_t>().value();
511 constLowBit = lhs < rhs ? lhs : rhs;
513 mlir::emitError(loc,
"unsupported a variable as the index in the")
514 << slang::ast::toString(expr.getSelectionKind()) <<
"kind";
517 }
else if (expr.getSelectionKind() ==
518 slang::ast::RangeSelectionKind::IndexedDown) {
523 auto subtrahend = leftConst->integer().as<uint32_t>().value();
525 expr.right().constant->integer().as<uint32_t>().value();
526 constLowBit = subtrahend - sliceWidth - 1;
529 auto subtrahendType = cast<moore::UnpackedType>(subtrahend.getType());
530 auto intType = moore::IntType::get(context.
getContext(),
531 subtrahendType.getBitSize().value(),
532 subtrahendType.getDomain());
534 expr.right().constant->integer().as<uint32_t>().value() - 1;
535 auto minuend = builder.create<moore::ConstantOp>(
536 loc, intType, sliceWidth, expr.left().type->isSigned());
537 dynLowBit = builder.create<moore::SubOp>(loc, subtrahend, minuend);
542 constLowBit = leftConst->integer().as<uint32_t>().value();
546 auto range = expr.value().type->getFixedRange();
547 if (leftConst && rightConst)
548 return builder.create<moore::ExtractOp>(
549 loc, type, value, range.translateIndex(constLowBit));
550 return builder.create<moore::DynExtractOp>(
551 loc, type, value, getSelectIndex(dynLowBit, range));
554 Value visit(
const slang::ast::MemberAccessExpression &expr) {
556 auto valueType = expr.value().type;
560 if (valueType->isStruct()) {
561 return builder.create<moore::StructExtractOp>(
562 loc, type, builder.getStringAttr(expr.member.name), value);
564 if (valueType->isPackedUnion() || valueType->isUnpackedUnion()) {
565 return builder.create<moore::UnionExtractOp>(
566 loc, type, builder.getStringAttr(expr.member.name), value);
568 mlir::emitError(loc,
"expression of type ")
569 << value.getType() <<
" cannot be accessed";
574 Value visit(
const slang::ast::InsideExpression &expr) {
580 SmallVector<Value> conditions;
583 for (
const auto *listExpr : expr.rangeList()) {
587 if (
const auto *openRange =
588 listExpr->as_if<slang::ast::OpenRangeExpression>()) {
594 if (!lowBound || !highBound)
596 Value leftValue, rightValue;
599 if (openRange->left().type->isSigned() ||
600 expr.left().type->isSigned()) {
601 leftValue = builder.create<moore::SgeOp>(loc, lhs, lowBound);
603 leftValue = builder.create<moore::UgeOp>(loc, lhs, lowBound);
605 if (openRange->right().type->isSigned() ||
606 expr.left().type->isSigned()) {
607 rightValue = builder.create<moore::SleOp>(loc, lhs, highBound);
609 rightValue = builder.create<moore::UleOp>(loc, lhs, highBound);
611 cond = builder.create<moore::AndOp>(loc, leftValue, rightValue);
614 if (!listExpr->type->isSimpleBitVector()) {
615 if (listExpr->type->isUnpackedArray()) {
617 loc,
"unpacked arrays in 'inside' expressions not supported");
621 loc,
"only simple bit vectors supported in 'inside' expressions");
628 cond = builder.create<moore::WildcardEqOp>(loc, lhs, value);
630 conditions.push_back(cond);
634 auto result = conditions.back();
635 conditions.pop_back();
636 while (!conditions.empty()) {
637 result = builder.create<moore::OrOp>(loc, conditions.back(), result);
638 conditions.pop_back();
644 Value visit(
const slang::ast::ConditionalExpression &expr) {
648 if (expr.conditions.size() > 1) {
650 <<
"unsupported conditional expression with more than one condition";
653 const auto &cond = expr.conditions[0];
655 mlir::emitError(loc) <<
"unsupported conditional expression with pattern";
662 auto conditionalOp = builder.create<moore::ConditionalOp>(loc, type, value);
665 auto &trueBlock = conditionalOp.getTrueRegion().emplaceBlock();
666 auto &falseBlock = conditionalOp.getFalseRegion().emplaceBlock();
668 OpBuilder::InsertionGuard g(builder);
671 builder.setInsertionPointToStart(&trueBlock);
675 builder.create<moore::YieldOp>(loc, trueValue);
678 builder.setInsertionPointToStart(&falseBlock);
682 builder.create<moore::YieldOp>(loc, falseValue);
684 return conditionalOp.getResult();
688 Value visit(
const slang::ast::CallExpression &expr) {
690 if (expr.thisClass()) {
691 mlir::emitError(loc,
"unsupported class method call");
701 [&](
auto &subroutine) {
return visitCall(expr, subroutine); },
706 Value visitCall(
const slang::ast::CallExpression &expr,
707 const slang::ast::SubroutineSymbol *subroutine) {
715 SmallVector<Value> arguments;
716 for (
auto [callArg, declArg] :
717 llvm::zip(expr.arguments(), subroutine->getArguments())) {
721 auto *expr = callArg;
722 if (
const auto *assign = expr->as_if<slang::ast::AssignmentExpression>())
723 expr = &assign->left();
726 if (declArg->direction == slang::ast::ArgumentDirection::In)
732 arguments.push_back(value);
737 builder.create<mlir::func::CallOp>(loc, lowering->op, arguments);
742 if (callOp.getNumResults() == 0)
744 .create<mlir::UnrealizedConversionCastOp>(
745 loc, moore::VoidType::get(context.
getContext()), ValueRange{})
748 return callOp.getResult(0);
752 Value visitCall(
const slang::ast::CallExpression &expr,
753 const slang::ast::CallExpression::SystemCallInfo &info) {
754 const auto &subroutine = *
info.subroutine;
755 auto args = expr.arguments();
757 if (args.size() == 1) {
768 mlir::emitError(loc) <<
"unsupported system call `" << subroutine.name
774 Value visit(
const slang::ast::StringLiteral &expr) {
776 return builder.create<moore::StringConstantOp>(loc, type, expr.getValue());
780 Value visit(
const slang::ast::RealLiteral &expr) {
781 return builder.create<moore::RealLiteralOp>(
782 loc, builder.getF64FloatAttr(expr.getValue()));
786 Value visitAssignmentPattern(
787 const slang::ast::AssignmentPatternExpressionBase &expr,
788 unsigned replCount = 1) {
792 auto elementCount = expr.elements().size();
793 SmallVector<Value> elements;
794 elements.reserve(replCount * elementCount);
795 for (
auto elementExpr : expr.elements()) {
799 elements.push_back(value);
801 for (
unsigned replIdx = 1; replIdx < replCount; ++replIdx)
802 for (
unsigned elementIdx = 0; elementIdx < elementCount; ++elementIdx)
803 elements.push_back(elements[elementIdx]);
806 if (
auto intType = dyn_cast<moore::IntType>(type)) {
807 assert(intType.getWidth() == elements.size());
808 std::reverse(elements.begin(), elements.end());
809 return builder.create<moore::ConcatOp>(loc, intType, elements);
813 if (
auto structType = dyn_cast<moore::StructType>(type)) {
814 assert(structType.getMembers().size() == elements.size());
815 return builder.create<moore::StructCreateOp>(loc, structType, elements);
819 if (
auto structType = dyn_cast<moore::UnpackedStructType>(type)) {
820 assert(structType.getMembers().size() == elements.size());
821 return builder.create<moore::StructCreateOp>(loc, structType, elements);
825 if (
auto arrayType = dyn_cast<moore::ArrayType>(type)) {
826 assert(arrayType.getSize() == elements.size());
827 return builder.create<moore::ArrayCreateOp>(loc, arrayType, elements);
831 if (
auto arrayType = dyn_cast<moore::UnpackedArrayType>(type)) {
832 assert(arrayType.getSize() == elements.size());
833 return builder.create<moore::ArrayCreateOp>(loc, arrayType, elements);
836 mlir::emitError(loc) <<
"unsupported assignment pattern with type " << type;
840 Value visit(
const slang::ast::SimpleAssignmentPatternExpression &expr) {
841 return visitAssignmentPattern(expr);
844 Value visit(
const slang::ast::StructuredAssignmentPatternExpression &expr) {
845 return visitAssignmentPattern(expr);
848 Value visit(
const slang::ast::ReplicatedAssignmentPatternExpression &expr) {
851 assert(count &&
"Slang guarantees constant non-zero replication count");
852 return visitAssignmentPattern(expr, *count);
855 Value visit(
const slang::ast::StreamingConcatenationExpression &expr) {
856 SmallVector<Value> operands;
857 for (
auto stream : expr.streams()) {
858 auto operandLoc = context.
convertLocation(stream.operand->sourceRange);
859 if (!stream.constantWithWidth.has_value() && stream.withExpr) {
860 mlir::emitError(operandLoc)
861 <<
"Moore only support streaming "
862 "concatenation with fixed size 'with expression'";
866 if (stream.constantWithWidth.has_value()) {
868 auto type = cast<moore::UnpackedType>(value.getType());
869 auto intType = moore::IntType::get(
870 context.
getContext(), type.getBitSize().value(), type.getDomain());
880 operands.push_back(value);
884 if (operands.size() == 1) {
887 value = operands.front();
889 value = builder.create<moore::ConcatOp>(loc, operands).getResult();
892 if (expr.sliceSize == 0) {
896 auto type = cast<moore::IntType>(value.getType());
897 SmallVector<Value> slicedOperands;
898 auto iterMax = type.getWidth() / expr.sliceSize;
899 auto remainSize = type.getWidth() % expr.sliceSize;
901 for (
size_t i = 0; i < iterMax; i++) {
902 auto extractResultType = moore::IntType::get(
903 context.
getContext(), expr.sliceSize, type.getDomain());
905 auto extracted = builder.create<moore::ExtractOp>(
906 loc, extractResultType, value, i * expr.sliceSize);
907 slicedOperands.push_back(extracted);
911 auto extractResultType = moore::IntType::get(
912 context.
getContext(), remainSize, type.getDomain());
914 auto extracted = builder.create<moore::ExtractOp>(
915 loc, extractResultType, value, iterMax * expr.sliceSize);
916 slicedOperands.push_back(extracted);
919 return builder.create<moore::ConcatOp>(loc, slicedOperands);
923 template <
typename T>
924 Value visit(T &&node) {
925 mlir::emitError(loc,
"unsupported expression: ")
926 << slang::ast::toString(node.kind);
930 Value visitInvalid(
const slang::ast::Expression &expr) {
931 mlir::emitError(loc,
"invalid expression");
938struct LvalueExprVisitor {
943 LvalueExprVisitor(
Context &context, Location loc)
944 : context(context), loc(loc), builder(context.builder) {}
947 Value visit(
const slang::ast::NamedValueExpression &expr) {
948 if (
auto value = context.
valueSymbols.lookup(&expr.symbol))
950 auto d = mlir::emitError(loc,
"unknown name `") << expr.symbol.name <<
"`";
952 <<
"no lvalue generated for " << slang::ast::toString(expr.symbol.kind);
957 Value visit(
const slang::ast::HierarchicalValueExpression &expr) {
958 if (
auto value = context.
valueSymbols.lookup(&expr.symbol))
963 auto d = mlir::emitError(loc,
"unknown hierarchical name `")
964 << expr.symbol.name <<
"`";
966 <<
"no lvalue generated for " << slang::ast::toString(expr.symbol.kind);
971 Value visit(
const slang::ast::ConcatenationExpression &expr) {
972 SmallVector<Value> operands;
973 for (
auto *operand : expr.operands()) {
977 operands.push_back(value);
979 return builder.create<moore::ConcatRefOp>(loc, operands);
983 Value visit(
const slang::ast::ElementSelectExpression &expr) {
988 if (
auto *constValue = expr.selector().constant) {
989 assert(!constValue->hasUnknown());
990 assert(constValue->size() <= 32);
992 auto lowBit = constValue->integer().as<uint32_t>().value();
993 return builder.create<moore::ExtractRefOp>(
994 loc, moore::RefType::get(cast<moore::UnpackedType>(type)), value,
1000 return builder.create<moore::DynExtractRefOp>(
1001 loc, moore::RefType::get(cast<moore::UnpackedType>(type)), value,
1006 Value visit(
const slang::ast::RangeSelectExpression &expr) {
1009 if (!type || !value)
1013 uint32_t constLowBit;
1014 auto *leftConst = expr.left().constant;
1015 auto *rightConst = expr.right().constant;
1017 assert(!leftConst->hasUnknown());
1018 assert(leftConst->size() <= 32);
1021 assert(!rightConst->hasUnknown());
1022 assert(rightConst->size() <= 32);
1025 if (expr.getSelectionKind() == slang::ast::RangeSelectionKind::Simple) {
1026 if (leftConst && rightConst) {
1028 auto lhs = leftConst->integer().as<uint32_t>().value();
1029 auto rhs = rightConst->integer().as<uint32_t>().value();
1030 constLowBit = lhs < rhs ? lhs : rhs;
1032 mlir::emitError(loc,
"unsupported a variable as the index in the")
1033 << slang::ast::toString(expr.getSelectionKind()) <<
"kind";
1036 }
else if (expr.getSelectionKind() ==
1037 slang::ast::RangeSelectionKind::IndexedDown) {
1042 auto subtrahend = leftConst->integer().as<uint32_t>().value();
1044 expr.right().constant->integer().as<uint32_t>().value();
1045 constLowBit = subtrahend - sliceWidth - 1;
1048 auto subtrahendType = cast<moore::UnpackedType>(subtrahend.getType());
1049 auto intType = moore::IntType::get(context.
getContext(),
1050 subtrahendType.getBitSize().value(),
1051 subtrahendType.getDomain());
1053 expr.right().constant->integer().as<uint32_t>().value() - 1;
1055 builder.create<moore::ConstantOp>(loc, intType, sliceWidth);
1056 dynLowBit = builder.create<moore::SubOp>(loc, subtrahend, minuend);
1061 constLowBit = leftConst->integer().as<uint32_t>().value();
1065 if (leftConst && rightConst)
1066 return builder.create<moore::ExtractRefOp>(
1067 loc, moore::RefType::get(cast<moore::UnpackedType>(type)), value,
1069 return builder.create<moore::DynExtractRefOp>(
1070 loc, moore::RefType::get(cast<moore::UnpackedType>(type)), value,
1074 Value visit(
const slang::ast::StreamingConcatenationExpression &expr) {
1075 SmallVector<Value> operands;
1076 for (
auto stream : expr.streams()) {
1077 auto operandLoc = context.
convertLocation(stream.operand->sourceRange);
1078 if (!stream.constantWithWidth.has_value() && stream.withExpr) {
1079 mlir::emitError(operandLoc)
1080 <<
"Moore only support streaming "
1081 "concatenation with fixed size 'with expression'";
1085 if (stream.constantWithWidth.has_value()) {
1087 auto type = cast<moore::UnpackedType>(
1088 cast<moore::RefType>(value.getType()).getNestedType());
1089 auto intType = moore::RefType::get(moore::IntType::get(
1090 context.
getContext(), type.getBitSize().value(), type.getDomain()));
1099 operands.push_back(value);
1102 if (operands.size() == 1) {
1105 value = operands.front();
1107 value = builder.create<moore::ConcatRefOp>(loc, operands).getResult();
1110 if (expr.sliceSize == 0) {
1114 auto type = cast<moore::IntType>(
1115 cast<moore::RefType>(value.getType()).getNestedType());
1116 SmallVector<Value> slicedOperands;
1117 auto widthSum = type.getWidth();
1118 auto domain = type.getDomain();
1119 auto iterMax = widthSum / expr.sliceSize;
1120 auto remainSize = widthSum % expr.sliceSize;
1122 for (
size_t i = 0; i < iterMax; i++) {
1123 auto extractResultType = moore::RefType::get(
1124 moore::IntType::get(context.
getContext(), expr.sliceSize, domain));
1126 auto extracted = builder.create<moore::ExtractRefOp>(
1127 loc, extractResultType, value, i * expr.sliceSize);
1128 slicedOperands.push_back(extracted);
1132 auto extractResultType = moore::RefType::get(
1133 moore::IntType::get(context.
getContext(), remainSize, domain));
1135 auto extracted = builder.create<moore::ExtractRefOp>(
1136 loc, extractResultType, value, iterMax * expr.sliceSize);
1137 slicedOperands.push_back(extracted);
1140 return builder.create<moore::ConcatRefOp>(loc, slicedOperands);
1143 Value visit(
const slang::ast::MemberAccessExpression &expr) {
1145 auto valueType = expr.value().type;
1147 if (!type || !value)
1149 if (valueType->isStruct()) {
1150 return builder.create<moore::StructExtractRefOp>(
1151 loc, moore::RefType::get(cast<moore::UnpackedType>(type)),
1152 builder.getStringAttr(expr.member.name), value);
1154 if (valueType->isPackedUnion() || valueType->isUnpackedUnion()) {
1155 return builder.create<moore::UnionExtractRefOp>(
1156 loc, moore::RefType::get(cast<moore::UnpackedType>(type)),
1157 builder.getStringAttr(expr.member.name), value);
1159 mlir::emitError(loc,
"expression of type ")
1160 << value.getType() <<
" cannot be accessed";
1165 template <
typename T>
1166 Value visit(T &&node) {
1170 Value visitInvalid(
const slang::ast::Expression &expr) {
1171 mlir::emitError(loc,
"invalid expression");
1178 Type requiredType) {
1180 auto value = expr.visit(RvalueExprVisitor(*
this, loc));
1181 if (value && requiredType)
1189 return expr.visit(LvalueExprVisitor(*
this, loc));
1197 if (
auto type = dyn_cast_or_null<moore::IntType>(value.getType()))
1198 if (type.getBitSize() == 1)
1200 if (
auto type = dyn_cast_or_null<moore::UnpackedType>(value.getType()))
1201 return builder.create<moore::BoolCastOp>(value.getLoc(), value);
1202 mlir::emitError(value.getLoc(),
"expression of type ")
1203 << value.getType() <<
" cannot be cast to a boolean";
1209 const slang::ast::Type &astType, Location loc) {
1214 bool typeIsFourValued =
false;
1215 if (
auto unpackedType = dyn_cast<moore::UnpackedType>(type))
1219 auto intType = moore::IntType::get(
getContext(), fvint.getBitWidth(),
1220 fvint.hasUnknown() || typeIsFourValued
1223 Value result =
builder.create<moore::ConstantOp>(loc, intType, fvint);
1224 if (result.getType() != type)
1225 result =
builder.create<moore::ConversionOp>(loc, type, result);
1230 const slang::ast::Type &type, Location loc) {
1231 if (constant.isInteger())
1238 using slang::ast::EvalFlags;
1239 slang::ast::EvalContext evalContext(
1240 compilation, EvalFlags::CacheResults | EvalFlags::SpecparamsAllowed);
1241 return expr.eval(evalContext);
1250 auto type = moore::IntType::get(
getContext(), 1, domain);
1251 if (value.getType() == type)
1253 return builder.create<moore::ConversionOp>(value.getLoc(), type, value);
1259 if (isa<moore::IntType>(value.getType()))
1266 if (
auto packed = dyn_cast<moore::PackedType>(value.getType())) {
1267 if (
auto bits = packed.getBitSize()) {
1269 moore::IntType::get(value.getContext(), *bits, packed.getDomain());
1270 return builder.create<moore::ConversionOp>(value.getLoc(), sbvType,
1275 mlir::emitError(value.getLoc()) <<
"expression of type " << value.getType()
1276 <<
" cannot be cast to a simple bit vector";
1282 if (type == value.getType())
1284 auto dstPacked = dyn_cast<moore::PackedType>(type);
1285 auto srcPacked = dyn_cast<moore::PackedType>(value.getType());
1288 if (dstPacked && srcPacked && dstPacked.getBitSize() &&
1289 srcPacked.getBitSize() &&
1290 *dstPacked.getBitSize() != *srcPacked.getBitSize()) {
1291 auto dstWidth = *dstPacked.getBitSize();
1292 auto srcWidth = *srcPacked.getBitSize();
1295 auto srcWidthType = moore::IntType::get(value.getContext(), srcWidth,
1296 srcPacked.getDomain());
1297 if (value.getType() != srcWidthType)
1298 value =
builder.create<moore::ConversionOp>(value.getLoc(), srcWidthType,
1303 auto dstWidthType = moore::IntType::get(value.getContext(), dstWidth,
1304 srcPacked.getDomain());
1305 if (dstWidth < srcWidth) {
1306 value =
builder.create<moore::TruncOp>(loc, dstWidthType, value);
1307 }
else if (dstWidth > srcWidth) {
1309 value =
builder.create<moore::SExtOp>(loc, dstWidthType, value);
1311 value =
builder.create<moore::ZExtOp>(loc, dstWidthType, value);
1315 if (value.getType() != type)
1316 value =
builder.create<moore::ConversionOp>(loc, type, value);
1322 Location loc, Value value) {
1323 auto systemCallRes =
1324 llvm::StringSwitch<std::function<FailureOr<Value>()>>(subroutine.name)
1326 .Case(
"$signed", [&]() {
return value; })
1327 .Case(
"$unsigned", [&]() {
return value; })
1331 [&]() -> FailureOr<Value> {
1335 return (Value)
builder.create<moore::Clog2BIOp>(loc, value);
1339 return builder.create<moore::LnBIOp>(loc, value);
1343 return builder.create<moore::Log10BIOp>(loc, value);
1347 return builder.create<moore::SinBIOp>(loc, value);
1351 return builder.create<moore::CosBIOp>(loc, value);
1355 return builder.create<moore::TanBIOp>(loc, value);
1359 return builder.create<moore::ExpBIOp>(loc, value);
1363 return builder.create<moore::SqrtBIOp>(loc, value);
1367 return builder.create<moore::FloorBIOp>(loc, value);
1371 return builder.create<moore::CeilBIOp>(loc, value);
1375 return builder.create<moore::AsinBIOp>(loc, value);
1379 return builder.create<moore::AcosBIOp>(loc, value);
1383 return builder.create<moore::AtanBIOp>(loc, value);
1387 return builder.create<moore::SinhBIOp>(loc, value);
1391 return builder.create<moore::CoshBIOp>(loc, value);
1395 return builder.create<moore::TanhBIOp>(loc, value);
1399 return builder.create<moore::AsinhBIOp>(loc, value);
1403 return builder.create<moore::AcoshBIOp>(loc, value);
1407 return builder.create<moore::AtanhBIOp>(loc, value);
1409 .Default([&]() -> Value {
return {}; });
1410 return systemCallRes();
assert(baseType &&"element must be base type")
static FVInt convertSVIntToFVInt(const slang::SVInt &svint)
Convert a Slang SVInt to a CIRCT FVInt.
Four-valued arbitrary precision integers.
Domain
The number of values each bit of a type can assume.
@ FourValued
Four-valued types such as logic or integer.
@ TwoValued
Two-valued types such as bit or int.
The InstanceGraph op interface, see InstanceGraphInterface.td for more details.
A helper class to facilitate the conversion from a Slang AST to MLIR operations.
Value materializeConversion(Type type, Value value, bool isSigned, Location loc)
Helper function to insert the necessary operations to cast a value from one type to another.
Value convertLvalueExpression(const slang::ast::Expression &expr)
Value materializeConstant(const slang::ConstantValue &constant, const slang::ast::Type &type, Location loc)
Helper function to materialize a ConstantValue as an SSA value.
slang::ConstantValue evaluateConstant(const slang::ast::Expression &expr)
Evaluate the constant value of an expression.
slang::ast::Compilation & compilation
OpBuilder builder
The builder used to create IR operations.
std::function< void(moore::ReadOp)> rvalueReadCallback
A listener called for every variable or net being read.
Type convertType(const slang::ast::Type &type, LocationAttr loc={})
Convert a slang type into an MLIR type.
Value materializeSVInt(const slang::SVInt &svint, const slang::ast::Type &type, Location loc)
Helper function to materialize an SVInt as an SSA value.
Value convertToBool(Value value)
Helper function to convert a value to its "truthy" boolean value.
ValueSymbols valueSymbols
Value convertRvalueExpression(const slang::ast::Expression &expr, Type requiredType={})
Value convertToSimpleBitVector(Value value)
Helper function to convert a value to its simple bit vector representation, if it has one.
FailureOr< Value > convertSystemCallArity1(const slang::ast::SystemSubroutine &subroutine, Location loc, Value value)
Convert system function calls only have arity-1.
FunctionLowering * declareFunction(const slang::ast::SubroutineSymbol &subroutine)
Convert a function and its arguments to a function declaration in the IR.
MLIRContext * getContext()
Return the MLIR context.
SmallVector< Value > lvalueStack
A stack of assignment left-hand side values.
Location convertLocation(slang::SourceLocation loc)
Convert a slang SourceLocation into an MLIR Location.