luke
/
verilator
mirror of https://github.com/verilator/verilator.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Internals: Introduce TaskDpiUtils in V3Task (#2670) 

* Internals:Simplify V3Task.cpp. no functional change intended

* Internals:Introduce TaskDpiUtils in V3Task.cpp. No functional change intended
This commit is contained in:
Yutetsu TAKATSUKASA 2020-12-06 12:09:48 +09:00 committed by GitHub
parent 5476ff93e2
commit 301b4ff1ad
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 49 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

88
src/V3Task.cpp
View File

@ -320,6 +320,50 @@ public:
virtual ~TaskRelinkVisitor() override = default;
};
//######################################################################
// DPI related utility functions
struct TaskDpiUtils {
static std::vector<std::pair<AstUnpackArrayDType*, int>>
unpackDimsAndStrides(AstNodeDType* dtypep) {
std::vector<std::pair<AstUnpackArrayDType*, int>> dimStrides;
if (AstUnpackArrayDType* unpackp = VN_CAST(dtypep->skipRefp(), UnpackArrayDType)) {
const std::vector<AstUnpackArrayDType*> dims = unpackp->unpackDimensions();
dimStrides.resize(dims.size(), {nullptr, 0});
dimStrides.back() = {dims.back(), 1};
for (ssize_t i = dims.size() - 2; i >= 0; --i) {
dimStrides[i].first = dims[i];
dimStrides[i].second = dimStrides[i + 1].second * dims[i + 1]->elementsConst();
}
}
return dimStrides;
}
static bool dpiToInternalFrStmt(AstVar* portp, const string& frName, string& frstmt,
string& ket) {
ket.clear();
if (portp->basicp() && portp->basicp()->keyword() == AstBasicDTypeKwd::CHANDLE) {
frstmt = "VL_CVT_VP_Q(" + frName;
ket = ")";
} else if ((portp->basicp() && portp->basicp()->isDpiPrimitive())) {
frstmt = frName;
} else {
const string frSvType = portp->basicp()->isDpiBitVec() ? "SVBV" : "SVLV";
if (portp->isWide()) {
// Need to convert to wide, using special function
frstmt = "VL_SET_W_" + frSvType + "(" + cvtToStr(portp->width()) + ",";
return true;
} else {
const AstNodeDType* dtypep = portp->dtypep()->skipRefp();
frstmt = "VL_SET_" + string(dtypep->charIQWN()) + "_" + frSvType + "(";
if (VN_IS(dtypep, UnpackArrayDType)) frstmt += "&";
frstmt += frName;
ket = ")";
}
}
return false;
}
};
//######################################################################
// Task state, as a visitor of each AstNode
@ -651,20 +695,6 @@ private:
return new AstCStmt(portp->fileline(), stmt);
}
static std::vector<std::pair<AstUnpackArrayDType*, int>> unpackDimsAndStrides(AstVar* varp) {
std::vector<std::pair<AstUnpackArrayDType*, int>> dimStrides;
if (AstUnpackArrayDType* dtypep = VN_CAST(varp->dtypep()->skipRefp(), UnpackArrayDType)) {
const std::vector<AstUnpackArrayDType*> dims = dtypep->unpackDimensions();
dimStrides.resize(dims.size(), {nullptr, 0});
dimStrides.back() = {dims.back(), 1};
for (ssize_t i = dims.size() - 2; i >= 0; --i) {
dimStrides[i].first = dims[i];
dimStrides[i].second = dimStrides[i + 1].second * dims[i + 1]->elementsConst();
}
}
return dimStrides;
}
AstNode* createAssignDpiToInternal(AstVarScope* portvscp, const string& frName) {
// Create assignment from DPI temporary into internal format
// DPI temporary is scalar or 1D array (if unpacked array)
@ -672,7 +702,7 @@ private:
AstVar* portp = portvscp->varp();
string frstmt;
string ket;
const bool useSetWSvlv = V3Task::dpiToInternalFrStmt(portp, frName, frstmt, ket);
const bool useSetWSvlv = TaskDpiUtils::dpiToInternalFrStmt(portp, frName, frstmt, ket);
// Use a AstCMath, as we want V3Clean to mask off bits that don't make sense.
int cwidth = VL_IDATASIZE;
if (!useSetWSvlv && portp->basicp()) {
@ -684,12 +714,12 @@ private:
}
const std::vector<std::pair<AstUnpackArrayDType*, int>> dimStrides
= unpackDimsAndStrides(portvscp->varp());
= TaskDpiUtils::unpackDimsAndStrides(portp->dtypep());
const int total = dimStrides.empty() ? 1
: dimStrides.front().first->elementsConst()
* dimStrides.front().second;
AstNode* newp = nullptr;
const int widthWords = portvscp->varp()->basicp()->widthWords();
const int widthWords = portp->basicp()->widthWords();
for (int i = 0; i < total; ++i) {
AstNode* srcp = new AstVarRef(portvscp->fileline(), portvscp, VAccess::WRITE);
// extract a scalar from multi-dimensional array (internal format)
@ -710,7 +740,7 @@ private:
string from = frstmt;
if (!dimStrides.empty()) {
// e.g. time is 64bit svLogicVector
const int coef = portvscp->varp()->basicp()->isDpiLogicVec() ? widthWords : 1;
const int coef = portp->basicp()->isDpiLogicVec() ? widthWords : 1;
from += "[" + cvtToStr(i * coef) + "]";
}
from += ket;
@ -1647,27 +1677,7 @@ string V3Task::assignInternalToDpi(AstVar* portp, bool isPtr, const string& frSu
bool V3Task::dpiToInternalFrStmt(AstVar* portp, const string& frName, string& frstmt,
string& ket) {
ket.clear();
if (portp->basicp() && portp->basicp()->keyword() == AstBasicDTypeKwd::CHANDLE) {
frstmt = "VL_CVT_VP_Q(" + frName;
ket = ")";
} else if ((portp->basicp() && portp->basicp()->isDpiPrimitive())) {
frstmt = frName;
} else {
const string frSvType = portp->basicp()->isDpiBitVec() ? "SVBV" : "SVLV";
if (portp->isWide()) {
// Need to convert to wide, using special function
frstmt = "VL_SET_W_" + frSvType + "(" + cvtToStr(portp->width()) + ",";
return true;
} else {
const AstNodeDType* dtypep = portp->dtypep()->skipRefp();
frstmt = "VL_SET_" + string(dtypep->charIQWN()) + "_" + frSvType + "(";
if (VN_IS(dtypep, UnpackArrayDType)) frstmt += "&";
frstmt += frName;
ket = ")";
}
}
return false;
return TaskDpiUtils::dpiToInternalFrStmt(portp, frName, frstmt, ket);
}
const char* V3Task::dpiTemporaryVarSuffix() {