Mario1159/verilator
1
0
Fork 0
forked from github/verilator
Code Pull Requests Releases 1 Activity

Internals: Refactoring V3WidthSel. No functional change.

Browse Source
This commit is contained in:
Wilson Snyder 2014-03-08 14:41:11 -05:00
parent 8a8aab1aae
commit 2bdd3ca353
1 changed files with 17 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
src/V3WidthSel.cpp
View File

@ -175,6 +175,22 @@ private:
}
}
AstNodeDType* sliceDType(AstPackArrayDType* nodep, int msb, int lsb) {
// Return slice needed for msb/lsb, either as original dtype or a new slice dtype
if (nodep->declRange().elements() == (msb-lsb+1) // Extracting whole of original array
&& nodep->declRange().lo() == lsb) {
return nodep;
} else {
// Need a slice data type, which is an array of the extracted type, but with (presumably) different size
VNumRange newRange (msb, lsb, nodep->declRange().littleEndian());
AstNodeDType* vardtypep = new AstPackArrayDType(nodep->fileline(),
nodep->subDTypep(), // Need to strip off array reference
new AstRange(nodep->fileline(), newRange));
v3Global.rootp()->typeTablep()->addTypesp(vardtypep);
return vardtypep;
}
}
// VISITORS
// If adding new visitors, insure V3Width's visit(TYPE) calls into here
@ -302,18 +318,7 @@ private:
new AstConst(nodep->fileline(),AstConst::Unsized32(),(msb-lsb+1)*elwidth));
newp->declRange(fromRange);
newp->declElWidth(elwidth);
if (fromRange.elements() == (msb-lsb+1) // Extracting whole of original array
&& fromRange.lo() == lsb) {
newp->dtypeFrom(adtypep);
} else {
// Need a slice data type, which is an array of the extracted type, but with (presumably) different size
VNumRange newRange (msb, lsb, fromRange.littleEndian());
AstNodeDType* vardtypep = new AstPackArrayDType(nodep->fileline(),
adtypep->subDTypep(), // Need to strip off array reference
new AstRange(nodep->fileline(), newRange));
v3Global.rootp()->typeTablep()->addTypesp(vardtypep);
newp->dtypeFrom(vardtypep);
}
newp->dtypeFrom(sliceDType(adtypep, msb, lsb));
//if (debug()>=9) newp->dumpTree(cout,"--EXTBTn: ");
if (newp->widthMin()!=(int)newp->widthConst()) nodep->v3fatalSrc("Width mismatch");
nodep->replaceWith(newp); pushDeletep(nodep); nodep=NULL;