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synth_xilinx: Support init values on Spartan 6 flip-flops properly.

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This commit is contained in:
Marcin Kościelnicki 2019-08-16 03:14:30 +00:00
parent a82e8df7d3
commit fda94311ee
5 changed files with 219 additions and 53 deletions
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23
techlibs/xilinx/synth_xilinx.cc
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@ -266,6 +266,14 @@ struct SynthXilinxPass : public ScriptPass
void script() YS_OVERRIDE
{
std::string ff_map_file;
if (help_mode)
ff_map_file = "+/xilinx/xc6s_ff_map.v";
else if (family == "xc6s")
ff_map_file = "+/xilinx/xc6s_ff_map.v";
else
ff_map_file = "+/xilinx/xc7_ff_map.v";
if (check_label("begin")) {
if (vpr)
run("read_verilog -lib -D_EXPLICIT_CARRY +/xilinx/cells_sim.v");
@ -416,11 +424,9 @@ struct SynthXilinxPass : public ScriptPass
}
if (check_label("map_ffs")) {
if (abc9 || help_mode) {
run("techmap -map +/xilinx/ff_map.v", "('-abc9' only)");
run("dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT "
"-ff FDRE_1 Q INIT -ff FDCE_1 Q INIT -ff FDPE_1 Q INIT -ff FDSE_1 Q INIT", "('-abc9' only)");
}
if (abc9 || help_mode) {
run("techmap -map " + ff_map_file, "('-abc9' only)");
}
}
if (check_label("map_luts")) {
@ -453,15 +459,12 @@ struct SynthXilinxPass : public ScriptPass
run("xilinx_srl -fixed -minlen 3", "(skip if '-nosrl')");
std::string techmap_args = "-map +/xilinx/lut_map.v -map +/xilinx/cells_map.v";
if (help_mode)
techmap_args += " [-map +/xilinx/ff_map.v]";
techmap_args += " [-map " + ff_map_file + "]";
else if (abc9)
techmap_args += " -map +/xilinx/abc_unmap.v";
else
techmap_args += " -map +/xilinx/ff_map.v";
techmap_args += " -map " + ff_map_file;
run("techmap " + techmap_args);
if (!abc9 || help_mode)
run("dffinit -ff FDRE Q INIT -ff FDCE Q INIT -ff FDPE Q INIT -ff FDSE Q INIT "
"-ff FDRE_1 Q INIT -ff FDCE_1 Q INIT -ff FDPE_1 Q INIT -ff FDSE_1 Q INIT", "(without '-abc9' only)");
run("clean");
}