luke/verilator
1
0
Fork 0
mirror of https://github.com/verilator/verilator.git synced 2026-10-06 10:03:44 +02:00
Code Issues Packages Projects Releases Wiki Activity

Support string character access via indexing.

Browse Source
This commit is contained in:
Wilson Snyder
2020-01-26 16:38:22 -05:00
parent 5430e4ac9b
commit 9fd81b2c6b
7 changed files with 77 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/V3WidthSel.cpp
+16 -2
View File
@@ -99,7 +99,8 @@ private:
fromRange = adtypep->declRange();
}
else if (AstBasicDType* adtypep = VN_CAST(ddtypep, BasicDType)) {
if (adtypep->isRanged()) {
if (adtypep->isString() && VN_IS(nodep, SelBit)) {
} else if (adtypep->isRanged()) {
UASSERT_OBJ(!(adtypep->rangep()
&& (!VN_IS(adtypep->rangep()->msbp(), Const)
|| !VN_IS(adtypep->rangep()->lsbp(), Const))),
@@ -268,7 +269,20 @@ private:
if (debug()>=9) newp->dumpTree(cout, "--SELBTq: ");
nodep->replaceWith(newp); VL_DO_DANGLING(pushDeletep(nodep), nodep);
}
else if (VN_IS(ddtypep, BasicDType)) {
else if (VN_IS(ddtypep, BasicDType) && ddtypep->isString()) {
// SELBIT(string, index) -> GETC(string, index)
AstNodeVarRef* varrefp = VN_CAST(fromp, NodeVarRef);
if (!varrefp) nodep->v3error("Unsupported: String array operation on non-variable");
AstNode* newp;
if (varrefp && varrefp->lvalue()) {
newp = new AstGetcRefN(nodep->fileline(), fromp, rhsp);
} else {
newp = new AstGetcN(nodep->fileline(), fromp, rhsp);
}
UINFO(6, " new " << newp << endl);
nodep->replaceWith(newp);
VL_DO_DANGLING(pushDeletep(nodep), nodep);
} else if (VN_IS(ddtypep, BasicDType)) {
// SELBIT(range, index) -> SEL(array, index, 1)
AstSel* newp = new AstSel(nodep->fileline(),
fromp,