| //===- MipsInstrCompiler.td - Compiler Pseudos and Patterns -*- tablegen -*-===// | |
| // | |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. | |
| // See https://llvm.org/LICENSE.txt for license information. | |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception | |
| // | |
| //===----------------------------------------------------------------------===// | |
| // | |
| // This file describes the various pseudo instructions used by the compiler, | |
| // as well as Pat patterns used during instruction selection. | |
| // | |
| //===----------------------------------------------------------------------===// | |
| def shiftMask_32 : PatFrag<(ops node:$lhs), (and node:$lhs, imm), [{ | |
| return isUnneededShiftMask(N, 5); | |
| }]>; | |
| def shiftMask_64 : PatFrag<(ops node:$src0), (and node:$src0, imm), [{ | |
| return isUnneededShiftMask(N, 6); | |
| }]>; | |
| foreach width = [32, 64] in { | |
| defvar shiftMask = !cast<SDPatternOperator>("shiftMask_"#width); | |
| def mshl_#width : PatFrags<(ops node:$src0, node:$src1), | |
| [(shl node:$src0, node:$src1), (shl node:$src0, (shiftMask node:$src1))]>; | |
| def msrl_#width : PatFrags<(ops node:$src0, node:$src1), | |
| [(srl node:$src0, node:$src1), (srl node:$src0, (shiftMask node:$src1))]>; | |
| def msra_#width : PatFrags<(ops node:$src0, node:$src1), | |
| [(sra node:$src0, node:$src1), (sra node:$src0, (shiftMask node:$src1))]>; | |
| } |