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better lut handling

This commit is contained in:
Miodrag Milanovic 2019-09-18 17:45:19 +02:00
parent 8badd4d812
commit b0ca6de472
1 changed files with 14 additions and 4 deletions
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18
techlibs/anlogic/cells_sim.v
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@ -81,7 +81,8 @@ module AL_MAP_LUT1 (
); );
parameter [1:0] INIT = 2'h0; parameter [1:0] INIT = 2'h0;
parameter EQN = "(A)"; parameter EQN = "(A)";
assign o = INIT >> a;
assign o = a ? INIT[1] : INIT[0];
endmodule endmodule
module AL_MAP_LUT2 ( module AL_MAP_LUT2 (
@ -91,7 +92,9 @@ module AL_MAP_LUT2 (
); );
parameter [3:0] INIT = 4'h0; parameter [3:0] INIT = 4'h0;
parameter EQN = "(A)"; parameter EQN = "(A)";
assign o = INIT >> {b, a};
wire [1:0] s1 = b ? INIT[ 3:2] : INIT[1:0];
assign o = a ? s1[1] : s1[0];
endmodule endmodule
module AL_MAP_LUT3 ( module AL_MAP_LUT3 (
@ -102,7 +105,10 @@ module AL_MAP_LUT3 (
); );
parameter [7:0] INIT = 8'h0; parameter [7:0] INIT = 8'h0;
parameter EQN = "(A)"; parameter EQN = "(A)";
assign o = INIT >> {c, b, a};
wire [3:0] s2 = c ? INIT[ 7:4] : INIT[3:0];
wire [1:0] s1 = b ? s2[ 3:2] : s2[1:0];
assign o = a ? s1[1] : s1[0];
endmodule endmodule
module AL_MAP_LUT4 ( module AL_MAP_LUT4 (
@ -114,7 +120,11 @@ module AL_MAP_LUT4 (
); );
parameter [15:0] INIT = 16'h0; parameter [15:0] INIT = 16'h0;
parameter EQN = "(A)"; parameter EQN = "(A)";
assign o = INIT >> {d, c, b, a};
wire [7:0] s3 = d ? INIT[15:8] : INIT[7:0];
wire [3:0] s2 = c ? s3[ 7:4] : s3[3:0];
wire [1:0] s1 = b ? s2[ 3:2] : s2[1:0];
assign o = a ? s1[1] : s1[0];
endmodule endmodule
module AL_MAP_LUT5 ( module AL_MAP_LUT5 (