e4d2e1bd85
Himbaechel-gowin has learned how to place DFFs of all types by tracking the compatibility of CLK, CE and LSR inputs, as well as placing mutually compatible flip-flops in adjacent slices. Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
#ifndef GOWIN_H
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#define GOWIN_H
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#include "himbaechel_api.h"
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#include "himbaechel_helpers.h"
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#include "nextpnr.h"
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#define GEN_INIT_CONSTIDS
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#define HIMBAECHEL_CONSTIDS "uarch/gowin/constids.inc"
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#include "himbaechel_constids.h"
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NEXTPNR_NAMESPACE_BEGIN
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namespace {
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struct GowinImpl : HimbaechelAPI
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{
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~GowinImpl(){};
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void init_constids(Arch *arch) override { init_uarch_constids(arch); }
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void init(Context *ctx) override;
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void prePlace() override;
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void pack() override;
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bool isBelLocationValid(BelId bel, bool explain_invalid) const override;
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// Bel bucket functions
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IdString getBelBucketForCellType(IdString cell_type) const override;
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bool isValidBelForCellType(IdString cell_type, BelId bel) const override;
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private:
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HimbaechelHelpers h;
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// Validity checking
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struct GowinCellInfo
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{
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const NetInfo *lut_f = nullptr;
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const NetInfo *ff_d = nullptr, *ff_ce = nullptr, *ff_clk = nullptr, *ff_lsr = nullptr;
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};
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std::vector<GowinCellInfo> fast_cell_info;
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void assign_cell_info();
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bool slice_valid(int x, int y, int z) const;
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// modify LUTs with constant inputs
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void mod_lut_inputs(void);
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// Return true if a cell is a LUT
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inline bool type_is_lut(IdString cell_type) const {
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return cell_type.in(id_LUT1, id_LUT2, id_LUT3, id_LUT4);
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}
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inline bool is_lut(const CellInfo *cell) const {
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return type_is_lut(cell->type);
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}
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// Return true if a cell is a DFF
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inline bool type_is_dff(IdString cell_type) const {
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return cell_type.in(id_DFF, id_DFFE, id_DFFN, id_DFFNE,
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id_DFFS, id_DFFSE, id_DFFNS, id_DFFNSE,
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id_DFFR, id_DFFRE, id_DFFNR, id_DFFNRE,
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id_DFFP, id_DFFPE, id_DFFNP, id_DFFNPE,
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id_DFFC, id_DFFCE, id_DFFNC, id_DFFNCE);
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}
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inline bool is_dff(const CellInfo *cell) const {
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return type_is_dff(cell->type);
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}
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};
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struct GowinArch : HimbaechelArch
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{
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GowinArch() : HimbaechelArch("gowin"){};
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std::unique_ptr<HimbaechelAPI> create(const dict<std::string, std::string> &args)
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{
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return std::make_unique<GowinImpl>();
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}
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} exampleArch;
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} // namespace
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NEXTPNR_NAMESPACE_END
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#endif
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