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module top;
typedef struct packed {
logic a;
logic signed b;
byte c;
byte unsigned d;
reg [3:0] e;
reg signed [3:0] f;
struct packed {
logic a;
logic signed b;
} x;
struct packed signed {
logic a;
logic signed b;
} y;
} S;
S s;
initial begin
// test codegen for LHS
s.a = '1;
s.b = '1;
s.c = '1;
s.d = '1;
s.e = '1;
s.f = '1;
s.x.a = '1;
s.x.b = '1;
s.y.a = '1;
s.y.b = '1;
end
`define CHECK(expr, width, signedness) \
case (expr) \
1'sb1: \
case (expr) \
2'sb11: if (!(signedness)) fail = 1; \
default: if (signedness) fail = 1; \
endcase \
default: if (signedness) fail = 1; \
endcase \
case (expr) \
1'b1: if ((width) != 1) fail = 1; \
2'b11: if ((width) != 2) fail = 1; \
3'b111: if ((width) != 3) fail = 1; \
4'b1111: if ((width) != 4) fail = 1; \
5'b1111_1: if ((width) != 5) fail = 1; \
6'b1111_11: if ((width) != 6) fail = 1; \
7'b1111_11: if ((width) != 7) fail = 1; \
8'b1111_1111: if ((width) != 8) fail = 1; \
9'b1111_1111_1: if ((width) != 9) fail = 1; \
default: fail = 1; \
endcase \
begin \
reg [9:0] indirect; \
indirect = (expr); \
if ((indirect != (expr)) != (signedness)) fail = 1; \
indirect = $unsigned(expr); \
if ($countones(indirect) != (width)) fail = 1; \
end
initial begin
reg fail;
fail = 0;
`CHECK(s.a, 1, 0)
`CHECK(s.b, 1, 1)
`CHECK(s.c, 8, 1)
`CHECK(s.d, 8, 0)
`CHECK(s.e, 4, 0)
`CHECK(s.f, 4, 1)
`CHECK(s.x.a, 1, 0)
`CHECK(s.x.b, 1, 1)
`CHECK(s.y.a, 1, 0)
`CHECK(s.y.b, 1, 1)
`CHECK(s.x, 2, 0)
`CHECK(s.y, 2, 1)
assert (fail === 0);
end
endmodule
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