| // Copyright 2022 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // This file contains rules used by the laterLower pass. |
| |
| // Simplify ISEL x $0 z into ISELZ |
| (ISEL [a] x (MOVDconst [0]) z) => (ISELZ [a] x z) |
| // Simplify ISEL $0 y z into ISELZ by inverting comparison and reversing arguments. |
| (ISEL [a] (MOVDconst [0]) y z) => (ISELZ [a^0x4] y z) |
| |
| // SETBC, SETBCR is supported on ISA 3.1(Power10) and newer, use ISELZ for |
| // older targets |
| (SETBC [2] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [2] (MOVDconst [1]) cmp) |
| (SETBCR [2] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [6] (MOVDconst [1]) cmp) |
| (SETBC [0] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [0] (MOVDconst [1]) cmp) |
| (SETBCR [0] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [4] (MOVDconst [1]) cmp) |
| (SETBC [1] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [1] (MOVDconst [1]) cmp) |
| (SETBCR [1] cmp) && buildcfg.GOPPC64 <= 9 => (ISELZ [5] (MOVDconst [1]) cmp) |
