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fix: fix yosys-optimizer using boolean gate mapping with abc -fast mode #568

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Mar 27, 2024
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fix: fix yosys-optimizer using boolean gate mapping with abc -fast mode #568

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18 changes: 10 additions & 8 deletions lib/Transforms/YosysOptimizer/BooleanGateImporter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -20,14 +20,16 @@ namespace heir {
mlir::Operation *BooleanGateImporter::createOp(Yosys::RTLIL::Cell *cell,
SmallVector<Value> &inputs,
ImplicitLocOpBuilder &b) const {
auto op = llvm::StringSwitch<mlir::Operation *>(cell->type.substr(1))
.Case("inv", b.create<comb::InvOp>(inputs[0], false))
.Case("xnor2", b.create<comb::XNorOp>(inputs, false))
.Case("and2", b.create<comb::AndOp>(inputs, false))
.Case("xor2", b.create<comb::XorOp>(inputs, false))
.Case("nand2", b.create<comb::NandOp>(inputs, false))
.Case("nor2", b.create<comb::NorOp>(inputs, false))
.Case("or2", b.create<comb::OrOp>(inputs, false))
// standard cell names look like $_CELL_
auto op = llvm::StringSwitch<mlir::Operation *>(
cell->type.substr(2, cell->type.size() - 3))
.Case("NOT", b.create<comb::InvOp>(inputs[0], false))
.Case("XNOR", b.create<comb::XNorOp>(inputs, false))
.Case("AND", b.create<comb::AndOp>(inputs, false))
.Case("XOR", b.create<comb::XorOp>(inputs, false))
.Case("NAND", b.create<comb::NandOp>(inputs, false))
.Case("NOR", b.create<comb::NorOp>(inputs, false))
.Case("OR", b.create<comb::OrOp>(inputs, false))
.Default(nullptr);
if (op == nullptr) {
llvm_unreachable("unexpected cell type");
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3 changes: 1 addition & 2 deletions lib/Transforms/YosysOptimizer/YosysOptimizer.cpp
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Expand Up @@ -87,13 +87,12 @@ stat;
// $2: abc path
// $3: yosys runfiles path
// $4: abc fast option -fast
// TODO(#554): Re-enable -fast mode.
constexpr std::string_view kYosysBooleanTemplate = R"(
read_verilog {0};
hierarchy -check -top \{1};
proc; memory; stat;
techmap -map {3}/techmap.v; opt; stat;
abc -exe {2} -liberty {3}/tfhe-rs_cells.liberty; stat;
abc -exe {2} -g AND,NAND,OR,NOR,XOR,XNOR {4};
opt_clean -purge; stat;
rename -hide */c:*; rename -enumerate */c:*;
hierarchy -generate * o:Y i:*; opt; opt_clean -purge;
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1 change: 0 additions & 1 deletion lib/Transforms/YosysOptimizer/yosys/BUILD
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Expand Up @@ -9,6 +9,5 @@ filegroup(
name = "share_files",
srcs = glob([
"*.v",
"*.liberty",
]),
)
260 changes: 0 additions & 260 deletions lib/Transforms/YosysOptimizer/yosys/tfhe-rs_cells.liberty
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15 changes: 13 additions & 2 deletions tests/yosys_optimizer/add_one.mlir
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@@ -1,5 +1,7 @@
// RUN: heir-opt --yosys-optimizer --canonicalize --cse %s | FileCheck %s
// RUN: heir-opt --yosys-optimizer --canonicalize --cse %s | FileCheck %s --check-prefix=CHECK --check-prefix=LUT
// RUN: heir-opt --yosys-optimizer="abc-fast=True" --canonicalize --cse %s | FileCheck %s --check-prefix=CHECK --check-prefix=LUT-FAST
// RUN: heir-opt --yosys-optimizer="mode=Boolean" --canonicalize --cse %s | FileCheck --check-prefix=CHECK --check-prefix=BOOL %s
// RUN: heir-opt --yosys-optimizer="mode=Boolean abc-fast=True" --canonicalize --cse %s | FileCheck --check-prefix=CHECK --check-prefix=BOOL-FAST %s

module {
// CHECK-LABEL: @add_one
Expand All @@ -14,7 +16,16 @@ module {
ins(%in, %one: !secret.secret<i8>, i8) {
^bb0(%IN: i8, %ONE: i8) :
// CHECK-NOT: arith.addi
// BOOL-COUNT-7: comb.inv

// LUT-COUNT-11: comb.truth_table
// LUT-FAST-COUNT-13: comb.truth_table
// BOOL-COUNT-14: comb
// BOOL-FAST-COUNT-16: comb

// LUT-NOT: comb.truth_table
// LUT-FAST-NOT: comb.truth_table
// BOOL-NOT: comb
// BOOL-FAST-NOT: comb
%2 = arith.addi %IN, %ONE : i8
secret.yield %2 : i8
} -> (!secret.secret<i8>)
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