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Support multiple-output buf/not gate primitives

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This commit is contained in:
Wilson Snyder
2023-01-28 23:20:48 -05:00
parent a19dddf05e
commit 4208db7811
3 changed files with 37 additions and 15 deletions
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src/verilog.y
+22 -10
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@@ -5117,10 +5117,28 @@ gateRangeE<nodep>:
;
gateBuf<nodep>:
gateFront variable_lvalue ',' gatePinExpr ')'
{ $$ = new AstAssignW{$<fl>1, $2, $4}; DEL($1); }
// UNSUP // IEEE: Multiple output variable_lvalues
// UNSUP // Causes conflict - need to take in variable_lvalue or a gatePinExpr
gateFront variable_lvalue ',' exprList ')'
{ AstNodeExpr* inp = $4;
while (inp->nextp()) inp = VN_AS(inp->nextp(), NodeExpr);
$$ = new AstAssignW{$<fl>1, $2, GRAMMARP->createGatePin(inp->cloneTree(false))};
for (AstNodeExpr* outp = $4; outp->nextp(); outp = VN_CAST(outp->nextp(), NodeExpr)) {
$$->addNext(new AstAssignW{$<fl>1, outp->cloneTree(false),
GRAMMARP->createGatePin(inp->cloneTree(false))});
}
DEL($1); DEL($4); }
;
gateNot<nodep>:
gateFront variable_lvalue ',' exprList ')'
{ AstNodeExpr* inp = $4;
while (inp->nextp()) inp = VN_AS(inp->nextp(), NodeExpr);
$$ = new AstAssignW{$<fl>1, $2, new AstNot{$<fl>1,
GRAMMARP->createGatePin(inp->cloneTree(false))}};
for (AstNodeExpr* outp = $4; outp->nextp(); outp = VN_CAST(outp->nextp(), NodeExpr)) {
$$->addNext(new AstAssignW{$<fl>1, outp->cloneTree(false),
new AstNot{$<fl>1,
GRAMMARP->createGatePin(inp->cloneTree(false))}});
}
DEL($1); DEL($4); }
;
gateBufif0<nodep>:
gateFront variable_lvalue ',' gatePinExpr ',' gatePinExpr ')'
@@ -5130,12 +5148,6 @@ gateBufif1<nodep>:
gateFront variable_lvalue ',' gatePinExpr ',' gatePinExpr ')'
{ $$ = new AstAssignW{$<fl>1, $2, new AstBufIf1{$<fl>1, $6, $4}}; DEL($1); }
;
gateNot<nodep>:
gateFront variable_lvalue ',' gatePinExpr ')'
{ $$ = new AstAssignW{$<fl>1, $2, new AstNot{$<fl>1, $4}}; DEL($1); }
// UNSUP // IEEE: Multiple output variable_lvalues
// UNSUP // Causes conflict - need to take in variable_lvalue or a gatePinExpr
;
gateNotif0<nodep>:
gateFront variable_lvalue ',' gatePinExpr ',' gatePinExpr ')'
{ $$ = new AstAssignW{$<fl>1, $2, new AstBufIf1{$<fl>1, new AstNot{$<fl>1, $6},