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module demo_001(y1, y2, y3, y4);
output [7:0] y1, y2, y3, y4;
localparam [7:0] p1 = 123.45;
localparam real p2 = 123.45;
localparam real p3 = 123;
localparam p4 = 123.45;
assign y1 = p1 + 0.2;
assign y2 = p2 + 0.2;
assign y3 = p3 + 0.2;
assign y4 = p4 + 0.2;
endmodule
module demo_002(s, a, y);
input [4:0] s;
input [3:0] a;
output [7:0] y;
reg [7:0] data [21*16-1:0];
integer i;
initial begin
for (i = 0; i < 16; i = i+1) begin
data[ 0*16 + i] = 128 + 64 * $ln (i*0.2 - 0.8);
data[ 1*16 + i] = 128 + 64 * $log10 (i*0.2 - 0.8);
data[ 2*16 + i] = 128 + 64 * $exp (i*0.2 - 0.8);
data[ 3*16 + i] = 128 + 64 * $sqrt (i*0.2 - 0.8);
data[ 4*16 + i] = 128 + 64 * $floor (i*0.2 - 0.8);
data[ 5*16 + i] = 128 + 64 * $ceil (i*0.2 - 0.8);
data[ 6*16 + i] = 128 + 64 * $sin (i*0.2 - 0.8);
data[ 7*16 + i] = 128 + 64 * $cos (i*0.2 - 0.8);
data[ 8*16 + i] = 128 + 64 * $tan (i*0.2 - 0.8);
data[ 9*16 + i] = 128 + 64 * $asin (i*0.2 - 0.8);
data[10*16 + i] = 128 + 64 * $acos (i*0.2 - 0.8);
data[11*16 + i] = 128 + 64 * $atan (i*0.2 - 0.8);
data[12*16 + i] = 128 + 64 * $sinh (i*0.2 - 0.8);
data[13*16 + i] = 128 + 64 * $cosh (i*0.2 - 0.8);
data[14*16 + i] = 128 + 64 * $tanh (i*0.2 - 0.8);
data[15*16 + i] = 128 + 64 * $asinh (i*0.2 - 0.8);
data[16*16 + i] = 128 + 64 * $acosh (i*0.2 - 0.8);
data[17*16 + i] = 128 + 64 * $atanh (i*0.2 - 0.8);
end
end
assign y = s < 18 ? data[s*16 + a] : 0;
endmodule
module demo_003(s, a, b, y);
input [1:0] s;
input [3:0] a;
input [3:0] b;
output [7:0] y;
reg [7:0] data [3*16*16-1:0];
integer i, j;
initial begin
for (i = 0; i < 16; i = i+1)
for (j = 0; j < 16; j = j+1) begin
data[0*256 + i*16 + j] = 128 + 64 * $pow (i*0.2 - 0.8, j*0.2 - 0.8);
data[1*256 + i*16 + j] = 128 + 64 * $atan2 (i*0.2 - 0.8, j*0.2 - 0.8);
data[2*256 + i*16 + j] = 128 + 64 * $hypot (i*0.2 - 0.8, j*0.2 - 0.8);
end
end
assign y = s < 3 ? data[s*256 + a*16 + b] : 0;
endmodule
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