From: Clifford Wolf Date: Thu, 5 Mar 2015 19:37:55 +0000 (+0100) Subject: Added very first version of "synth_ice40" X-Git-Tag: yosys-0.6~378 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=42d5d94a5d28c251dbee62316ba6c1cb7cd71f24;p=yosys.git Added very first version of "synth_ice40" --- diff --git a/techlibs/ice40/Makefile.inc b/techlibs/ice40/Makefile.inc new file mode 100644 index 000000000..08a24d92f --- /dev/null +++ b/techlibs/ice40/Makefile.inc @@ -0,0 +1,6 @@ + +OBJS += techlibs/ice40/synth_ice40.o + +$(eval $(call add_share_file,share/ice40,techlibs/ice40/cells_map.v)) +$(eval $(call add_share_file,share/ice40,techlibs/ice40/cells_sim.v)) + diff --git a/techlibs/ice40/cells_map.v b/techlibs/ice40/cells_map.v new file mode 100644 index 000000000..f7008a571 --- /dev/null +++ b/techlibs/ice40/cells_map.v @@ -0,0 +1,32 @@ +module \$_DFF_P_ (input D, C, output Q); + SB_DFF _TECHMAP_REPLACE_ (.D(D), .Q(Q), .C(C)); +endmodule + +module \$lut (A, Y); + parameter WIDTH = 0; + parameter LUT = 0; + + input [WIDTH-1:0] A; + output Y; + + generate + if (WIDTH == 1) begin + SB_LUT4 #(.LUT_INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y), + .I0(A[0]), .I1(1'b0), .I2(1'b0), .I3(1'b0)); + end else + if (WIDTH == 2) begin + SB_LUT4 #(.LUT_INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y), + .I0(A[0]), .I1(A[1]), .I2(1'b0), .I3(1'b0)); + end else + if (WIDTH == 3) begin + SB_LUT4 #(.LUT_INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y), + .I0(A[0]), .I1(A[1]), .I2(A[2]), .I3(1'b0)); + end else + if (WIDTH == 4) begin + SB_LUT4 #(.LUT_INIT(LUT)) _TECHMAP_REPLACE_ (.O(Y), + .I0(A[0]), .I1(A[1]), .I2(A[2]), .I3(A[3])); + end else begin + wire _TECHMAP_FAIL_ = 1; + end + endgenerate +endmodule diff --git a/techlibs/ice40/cells_sim.v b/techlibs/ice40/cells_sim.v new file mode 100644 index 000000000..a1d9b0ca8 --- /dev/null +++ b/techlibs/ice40/cells_sim.v @@ -0,0 +1,12 @@ +module SB_LUT4(output O, input I0, I1, I2, I3); + parameter [15:0] INIT = 0; + wire [ 7: 0] s3 = I3 ? INIT[15: 8] : INIT[ 7: 0]; + wire [ 3: 0] s2 = I2 ? s3[ 7: 4] : s3[ 3: 0]; + wire [ 1: 0] s1 = I1 ? s2[ 3: 2] : s2[ 1: 0]; + assign O = I0 ? s1[1] : s1[0]; +endmodule + +module SB_DFF (output reg Q, input C, D); + always @(posedge C) + Q <= D; +endmodule diff --git a/techlibs/ice40/synth_ice40.cc b/techlibs/ice40/synth_ice40.cc new file mode 100644 index 000000000..8c98c4b27 --- /dev/null +++ b/techlibs/ice40/synth_ice40.cc @@ -0,0 +1,161 @@ +/* + * yosys -- Yosys Open SYnthesis Suite + * + * Copyright (C) 2012 Clifford Wolf + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "kernel/register.h" +#include "kernel/celltypes.h" +#include "kernel/rtlil.h" +#include "kernel/log.h" + +USING_YOSYS_NAMESPACE +PRIVATE_NAMESPACE_BEGIN + +bool check_label(bool &active, std::string run_from, std::string run_to, std::string label) +{ + if (label == run_from) + active = true; + if (label == run_to) + active = false; + return active; +} + +struct SynthIce40Pass : public Pass { + SynthIce40Pass() : Pass("synth_ice40", "synthesis for iCE40 FPGAs") { } + virtual void help() + { + // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---| + log("\n"); + log(" synth_ice40 [options]\n"); + log("\n"); + log("This command runs synthesis for iCE40 FPGAs. This work is experimental.\n"); + log("\n"); + log(" -top \n"); + log(" use the specified module as top module (default='top')\n"); + log("\n"); + log(" -run :\n"); + log(" only run the commands between the labels (see below). an empty\n"); + log(" from label is synonymous to 'begin', and empty to label is\n"); + log(" synonymous to the end of the command list.\n"); + log("\n"); + log("\n"); + log("The following commands are executed by this synthesis command:\n"); + log("\n"); + log(" begin:\n"); + log(" read_verilog -lib +/ice40/cells_sim.v\n"); + log(" hierarchy -check -top \n"); + log("\n"); + log(" coarse:\n"); + log(" synth -run coarse\n"); + log("\n"); + log(" fine:\n"); + log(" opt -fast -full\n"); + log(" memory_map\n"); + log(" opt -full\n"); + log(" techmap\n"); + log(" opt -fast\n"); + log("\n"); + log(" map_luts:\n"); + log(" abc -lut 4\n"); + log(" clean\n"); + log("\n"); + log(" map_cells:\n"); + log(" techmap -map +/ice40/cells_map.v\n"); + log(" clean\n"); + log("\n"); + log(" check:\n"); + log(" hierarchy -check\n"); + log(" stat\n"); + log(" check -noinit\n"); + log("\n"); + } + virtual void execute(std::vector args, RTLIL::Design *design) + { + std::string top_module = "top"; + std::string run_from, run_to; + + size_t argidx; + for (argidx = 1; argidx < args.size(); argidx++) + { + if (args[argidx] == "-top" && argidx+1 < args.size()) { + top_module = args[++argidx]; + continue; + } + if (args[argidx] == "-run" && argidx+1 < args.size()) { + size_t pos = args[argidx+1].find(':'); + if (pos == std::string::npos) + break; + run_from = args[++argidx].substr(0, pos); + run_to = args[argidx].substr(pos+1); + continue; + } + break; + } + extra_args(args, argidx, design); + + if (!design->full_selection()) + log_cmd_error("This comannd only operates on fully selected designs!\n"); + + bool active = run_from.empty(); + + log_header("Executing SYNTH_ICE40 pass.\n"); + log_push(); + + if (check_label(active, run_from, run_to, "begin")) + { + Pass::call(design, "read_verilog -lib +/ice40/cells_sim.v"); + Pass::call(design, stringf("hierarchy -check -top %s", top_module.c_str())); + } + + if (check_label(active, run_from, run_to, "coarse")) + { + Pass::call(design, "synth -run coarse"); + } + + if (check_label(active, run_from, run_to, "fine")) + { + Pass::call(design, "opt -fast -full"); + Pass::call(design, "memory_map"); + Pass::call(design, "opt -full"); + Pass::call(design, "techmap"); + Pass::call(design, "opt -fast"); + } + + if (check_label(active, run_from, run_to, "map_luts")) + { + Pass::call(design, "abc -lut 4"); + Pass::call(design, "clean"); + } + + if (check_label(active, run_from, run_to, "map_cells")) + { + Pass::call(design, "techmap -map +/ice40/cells_map.v"); + Pass::call(design, "clean"); + } + + if (check_label(active, run_from, run_to, "check")) + { + Pass::call(design, "hierarchy -check"); + Pass::call(design, "stat"); + Pass::call(design, "check -noinit"); + } + + log_pop(); + } +} SynthIce40Pass; + +PRIVATE_NAMESPACE_END