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Finished refactoring counter extraction to be nice and generic. Implemented techmapping from $__COUNT_ to GP_COUNTx cells.

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This commit is contained in:
Andrew Zonenberg 2017-08-28 22:13:36 -07:00
parent 46b01f05bb
commit 3fc1b9f3fd
3 changed files with 94 additions and 12 deletions
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68
techlibs/greenpak4/cells_map.v
View file

@ -144,3 +144,71 @@ module \$lut (A, Y);
end
endgenerate
endmodule
module \$__COUNT_ (CE, CLK, OUT, POUT, RST, UP);
input wire CE;
input wire CLK;
output reg OUT;
output reg[WIDTH-1:0] POUT;
input wire RST;
input wire UP;
parameter COUNT_TO = 1;
parameter RESET_MODE = "RISING";
parameter HAS_POUT = 0;
parameter HAS_CE = 0;
parameter WIDTH = 8;
parameter DIRECTION = "DOWN";
//If we have a CE, or DIRECTION other than DOWN fail... GP_COUNTx_ADV is not supported yet
if(HAS_CE || (DIRECTION != "DOWN") ) begin
initial begin
$display("ERROR: \$__COUNT__ support for GP_COUNTx_ADV is not yet implemented. This counter should never have been extracted (bug in extract_counter pass?).");
$finish;
end
end
//If counter is more than 14 bits wide, complain (also shouldn't happen)
else if(WIDTH > 14) begin
initial begin
$display("ERROR: \$__COUNT__ support for cascaded counters is not yet implemented. This counter should never have been extracted (bug in extract_counter pass?).");
$finish;
end
end
//If counter is more than 8 bits wide and has parallel output, we have a problem
else if(WIDTH > 8 && HAS_POUT) begin
initial begin
$display("ERROR: \$__COUNT__ support for 9-14 bit counters with parallel output is not yet implemented. This counter should never have been extracted (bug in extract_counter pass?).");
$finish;
end
end
//Looks like a legal counter! Do something with it
else if(WIDTH <= 8) begin
GP_COUNT8 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT),
.POUT(POUT)
);
end
else begin
GP_COUNT14 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT)
);
end
endmodule

2
techlibs/greenpak4/synth_greenpak4.cc
View file

@ -155,7 +155,7 @@ struct SynthGreenPAK4Pass : public ScriptPass
if (check_label("fine"))
{
run("extract_counter");
run("extract_counter -pout \\GP_DCMP,\\GP_DAC -maxwidth 14");
run("clean");
run("opt -fast -mux_undef -undriven -fine");
run("memory_map");