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Support reduction or in constraints (#6840)

This commit is contained in:
Pawel Kojma 2025-12-19 18:37:20 +01:00 committed by GitHub
parent 47d1a50aa4
commit 5244766b7b
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2 changed files with 19 additions and 0 deletions
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12
src/V3Randomize.cpp
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@ -1050,6 +1050,18 @@ class ConstraintExprVisitor final : public VNVisitor {
VL_DO_DANGLING(nodep->deleteTree(), nodep);
iterate(sump);
}
void visit(AstRedOr* nodep) override {
if (editFormat(nodep)) return;
// Convert to (x != 0)
FileLine* const fl = nodep->fileline();
AstNodeExpr* const argp = nodep->lhsp()->unlinkFrBack();
V3Number numZero{fl, argp->width(), 0};
AstNodeExpr* const neqp = new AstNeq{fl, argp, new AstConst{fl, numZero}};
neqp->user1(true);
nodep->replaceWith(neqp);
VL_DO_DANGLING(nodep->deleteTree(), nodep);
iterate(neqp);
}
void visit(AstNodeBiop* nodep) override {
if (editFormat(nodep)) return;
editSMT(nodep, nodep->lhsp(), nodep->rhsp());

7
test_regress/t/t_randomize_method_constraints.v
View File

@ -15,6 +15,10 @@ class Cls;
constraint A { v inside {ONE, THREE}; }
constraint B { w == 5; x inside {1,2} || x inside {4,5}; }
constraint C { z < 3 * 7; z > 5 + 8; u > 0; }
constraint D {
|redor == 1'b1;
redor[31:1] == 31'b0;
}
rand logic[79:0] u;
rand Enum v;
@ -22,6 +26,7 @@ class Cls;
rand logic[47:0] x;
rand logic[31:0] y;
rand logic[22:0] z;
rand logic[31:0] redor;
function new;
u = 0;
@ -50,12 +55,14 @@ module t;
$display("obj.x == %0d", obj.x);
$display("obj.y == %0d", obj.y);
$display("obj.z == %0d", obj.z);
$display("obj.redor == %0d", obj.redor);
$display("rand_result == %0d", rand_result);
$display("-------------------");
if (!(obj.v inside {ONE, THREE})) $stop;
if (obj.w != 5) $stop;
if (!(obj.x inside {1,2,4,5})) $stop;
if (obj.z <= 13 || obj.z >= 21) $stop;
if (obj.redor != 1) $stop;
end
//$display("===================\nUnsatisfiable constraints for obj.y:");
//rand_result = obj.randomize() with { 256 < y && y < 256; };