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struct conversion supports complex shadowing

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Zachary Snow
2019-04-22 02:33:24 -04:00
parent 05b7bdb99c
commit a8f2cbbe29
5 changed files with 201 additions and 37 deletions
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test/basic/struct_shadow.sv
+103
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typedef struct packed { logic w, x, y; } StructA;
typedef struct packed { logic w, y, x; } StructB;
typedef struct packed { logic x, w, y; } StructC;
typedef struct packed { logic y, w, x; } StructD;
typedef struct packed { logic x, y, w; } StructE;
typedef struct packed { logic y, x, w; } StructF;
module top;
integer i, j, k;
StructA a;
StructB b;
StructC c;
StructD d;
StructE e;
StructF f;
initial begin
for (i = 0; i < 2; i++) begin
for (j = 0; j < 2; j++) begin
for (k = 0; k < 2; k++) begin
a = '{ w:i, x:j, y:k };
b = '{ w:i, x:j, y:k };
c = '{ w:i, x:j, y:k };
d = '{ w:i, x:j, y:k };
e = '{ w:i, x:j, y:k };
f = '{ w:i, x:j, y:k };
$display("A: %1d%1d%1d -> ", i,j,k, a,b,c,d,e,f);
end
end
end
end
initial begin
integer i, j, k;
StructB a;
StructC b;
StructD c;
StructE d;
StructF e;
StructA f;
for (i = 0; i < 2; i++) begin
for (j = 0; j < 2; j++) begin
for (k = 0; k < 2; k++) begin
a = '{ w:i, x:j, y:k };
b = '{ w:i, x:j, y:k };
c = '{ w:i, x:j, y:k };
d = '{ w:i, x:j, y:k };
e = '{ w:i, x:j, y:k };
f = '{ w:i, x:j, y:k };
$display("B: %1d%1d%1d -> ", i,j,k, a,b,c,d,e,f);
end
end
end
begin
integer i, j, k;
StructC a;
StructD b;
StructE c;
StructF d;
StructA e;
StructB f;
for (i = 0; i < 2; i++) begin
for (j = 0; j < 2; j++) begin
for (k = 0; k < 2; k++) begin
a = '{ w:i, x:j, y:k };
b = '{ w:i, x:j, y:k };
c = '{ w:i, x:j, y:k };
d = '{ w:i, x:j, y:k };
e = '{ w:i, x:j, y:k };
f = '{ w:i, x:j, y:k };
$display("C: %1d%1d%1d -> ", i,j,k, a,b,c,d,e,f);
end
end
end
end
end
task foo;
integer i, j, k;
StructD a;
StructE b;
StructF c;
StructA d;
StructB e;
StructC f;
for (i = 0; i < 2; i++) begin
for (j = 0; j < 2; j++) begin
for (k = 0; k < 2; k++) begin
a = '{ w:i, x:j, y:k };
b = '{ w:i, x:j, y:k };
c = '{ w:i, x:j, y:k };
d = '{ w:i, x:j, y:k };
e = '{ w:i, x:j, y:k };
f = '{ w:i, x:j, y:k };
$display("D: %1d%1d%1d -> ", i,j,k, a,b,c,d,e,f);
end
end
end
endtask
initial foo();
endmodule
test/basic/struct_shadow.v
+48
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// While this might look silly, you'll notice that the sections are actually
// different. We are ensuring that the correct struct definitions are being used
// in each scope.
module top;
reg [2:0] a = 3'b111;
reg [2:0] b = 3'b111;
reg [2:0] c = 3'b111;
reg [2:0] d = 3'b111;
reg [2:0] e = 3'b111;
reg [2:0] f = 3'b111;
integer i = 2;
integer j = 2;
integer k = 2;
initial begin
$display("A: 000 -> 000000");
$display("A: 001 -> 121424");
$display("A: 010 -> 214142");
$display("A: 011 -> 335566");
$display("A: 100 -> 442211");
$display("A: 101 -> 563635");
$display("A: 110 -> 656353");
$display("A: 111 -> 777777");
$display("B: 000 -> 000000");
$display("B: 001 -> 214241");
$display("B: 010 -> 141422");
$display("B: 011 -> 355663");
$display("B: 100 -> 422114");
$display("B: 101 -> 636355");
$display("B: 110 -> 563536");
$display("B: 111 -> 777777");
$display("C: 000 -> 000000");
$display("C: 001 -> 142412");
$display("C: 010 -> 414221");
$display("C: 011 -> 556633");
$display("C: 100 -> 221144");
$display("C: 101 -> 363556");
$display("C: 110 -> 635365");
$display("C: 111 -> 777777");
$display("D: 000 -> 000000");
$display("D: 001 -> 424121");
$display("D: 010 -> 142214");
$display("D: 011 -> 566335");
$display("D: 100 -> 211442");
$display("D: 101 -> 635563");
$display("D: 110 -> 353656");
$display("D: 111 -> 777777");
end
endmodule
test/basic/struct_shadow_tb.v
+1
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// intentionally empty