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// DESCRIPTION::Verilog Test module
//
// This file ONLY is placed under the Creative Commons Public Domain, for
// any use, without warranty, 2013 by Wilson Snyder.
// SPDX-License-Identifier: CC0-1.0
`define stop $stop
`define checkh(gotv,expv) do if ((gotv) !== (expv)) begin $write("%%Error: %s:%0d: got='h%x exp='h%x\n", `__FILE__,`__LINE__, (gotv), (expv)); `stop; end while(0);
module t;
typedef enum logic [1:0]
{ ZERO = 2'd0,
ONE = 2'd1,
TWO = 2'd2,
THREE = 2'd3,
XXX = 2'dx
} num_t;
function automatic logic is_odd;
input en;
input num_t number;
case (en)
1'b1: begin
unique if (number inside {ONE, THREE})
is_odd = 1'b1;
else if (number inside {ZERO, TWO})
is_odd = 1'b0;
else
is_odd = 1'bx;
end
1'b0: is_odd = 1'bx;
default: is_odd = 1'bx;
endcase
endfunction
function automatic bit is_00_to_04 (input byte value);
return value inside { [ 8'h0 : 8'h04 ] };
endfunction
function automatic bit is_fe_to_ff (input byte value);
return value inside { [ 8'hfe : 8'hff ] };
endfunction
initial begin
`checkh ((4'd4 inside {4'd1,4'd5}), 1'b0);
`checkh ((4'd4 inside {4'd1,4'd4}), 1'b1);
//
`checkh ((4'b1011 inside {4'b1001}), 1'b0);
`checkh ((4'b1011 inside {4'b1xx1}), 1'b1); // Uses ==?
`checkh ((4'b1001 inside {4'b1xx1}), 1'b1); // Uses ==?
`checkh ((4'b1001 inside {4'b1??1}), 1'b1);
`ifndef VERILATOR
`checkh ((4'b1z11 inside {4'b11?1, 4'b1011}),1'bx);
`endif
// Range
`checkh ((4'd4 inside {[4'd5:4'd3], [4'd10:4'd8]}), 1'b0); // If left of colon < never matches
`checkh ((4'd3 inside {[4'd1:4'd2], [4'd3:4'd5]}), 1'b1);
`checkh ((4'd4 inside {[4'd1:4'd2], [4'd3:4'd5]}), 1'b1);
`checkh ((4'd5 inside {[4'd1:4'd2], [4'd3:4'd5]}), 1'b1);
`checkh ((4.0 inside {[4'd1:4'd2], [4'd3:4'd5]}), 1'b1);
//
// Unsupported $ bound
//
// Unsupported if unpacked array, elements tranversed
//int unpackedarray [$] = '{8,9};
//( expr inside {2, 3, unpackedarray}) // { 2,3,8,9}
//
`checkh (is_odd(1'b1, ZERO), 1'd0);
`checkh (is_odd(1'b1, ONE), 1'd1);
`checkh (is_odd(1'b1, TWO), 1'd0);
`checkh (is_odd(1'b1, THREE),1'd1);
`ifndef VERILATOR
`checkh (is_odd(1'b1, XXX), 1'dx);
`endif
//
// Should not give UNSIGNED/CMPCONST warnings
// (Verilator converts to 8'h00 >= 8'h00 which is always true)
`checkh(is_00_to_04(8'h00), 1'b1);
`checkh(is_00_to_04(8'h04), 1'b1);
`checkh(is_00_to_04(8'h05), 1'b0);
`checkh(is_fe_to_ff(8'hfd), 1'b0);
`checkh(is_fe_to_ff(8'hfe), 1'b1);
`checkh(is_fe_to_ff(8'hff), 1'b1);
//
$write("*-* All Finished *-*\n");
$finish;
end
endmodule
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