diff options
Diffstat (limited to 'src/codegen/llvm.zig')
| -rw-r--r-- | src/codegen/llvm.zig | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/codegen/llvm.zig b/src/codegen/llvm.zig index 572e23ff28..683ee9b95b 100644 --- a/src/codegen/llvm.zig +++ b/src/codegen/llvm.zig @@ -1777,6 +1777,7 @@ pub const FuncGen = struct { .get_union_tag => try self.airGetUnionTag(inst), .clz => try self.airClzCtz(inst, "ctlz"), .ctz => try self.airClzCtz(inst, "cttz"), + .popcount => try self.airPopCount(inst, "ctpop"), .atomic_store_unordered => try self.airAtomicStore(inst, .Unordered), .atomic_store_monotonic => try self.airAtomicStore(inst, .Monotonic), @@ -3679,6 +3680,40 @@ pub const FuncGen = struct { } } + fn airPopCount(self: *FuncGen, inst: Air.Inst.Index, prefix: [*:0]const u8) !?*const llvm.Value { + if (self.liveness.isUnused(inst)) return null; + + const ty_op = self.air.instructions.items(.data)[inst].ty_op; + const operand_ty = self.air.typeOf(ty_op.operand); + const operand = try self.resolveInst(ty_op.operand); + const target = self.dg.module.getTarget(); + const bits = operand_ty.intInfo(target).bits; + + var fn_name_buf: [100]u8 = undefined; + const llvm_fn_name = std.fmt.bufPrintZ(&fn_name_buf, "llvm.{s}.i{d}", .{ + prefix, bits, + }) catch unreachable; + const fn_val = self.dg.object.llvm_module.getNamedFunction(llvm_fn_name) orelse blk: { + const operand_llvm_ty = try self.dg.llvmType(operand_ty); + const param_types = [_]*const llvm.Type{operand_llvm_ty}; + const fn_type = llvm.functionType(operand_llvm_ty, ¶m_types, param_types.len, .False); + break :blk self.dg.object.llvm_module.addFunction(llvm_fn_name, fn_type); + }; + + const params = [_]*const llvm.Value{operand}; + const wrong_size_result = self.builder.buildCall(fn_val, ¶ms, params.len, .C, .Auto, ""); + const result_ty = self.air.typeOfIndex(inst); + const result_llvm_ty = try self.dg.llvmType(result_ty); + const result_bits = result_ty.intInfo(target).bits; + if (bits > result_bits) { + return self.builder.buildTrunc(wrong_size_result, result_llvm_ty, ""); + } else if (bits < result_bits) { + return self.builder.buildZExt(wrong_size_result, result_llvm_ty, ""); + } else { + return wrong_size_result; + } + } + fn callFloor(self: *FuncGen, arg: *const llvm.Value, ty: Type) !*const llvm.Value { return self.callFloatUnary(arg, ty, "floor"); } |