From c61a48619ff2d26543d0f4874ab495bbbfdc701f Mon Sep 17 00:00:00 2001
From: Guoqi Chen <chenguoqi@loongson.cn>
Date: Wed, 21 Jan 2026 17:32:49 +0800
Subject: [PATCH] cmd/compile: allow Bswap{64,32,16} on loong64

On Loong64, Bswap{64,32,16} has been implemented with REVB{2H, 2W,V} instruction

Change-Id: Ia7f40ef3b1a85bfb0b20563098cb792b00cec498
Reviewed-on: https://go-review.googlesource.com/c/go/+/737841
Reviewed-by: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
---
 src/cmd/compile/internal/ssa/config.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/cmd/compile/internal/ssa/config.go b/src/cmd/compile/internal/ssa/config.go
index 9cfaa58839..e796071fe8 100644
--- a/src/cmd/compile/internal/ssa/config.go
+++ b/src/cmd/compile/internal/ssa/config.go
@@ -304,6 +304,9 @@ func NewConfig(arch string, types Types, ctxt *obj.Link, optimize, softfloat boo
 		c.LinkReg = linkRegLOONG64
 		c.hasGReg = true
 		c.unalignedOK = true
+		c.haveBswap64 = true
+		c.haveBswap32 = true
+		c.haveBswap16 = true
 		c.haveCondSelect = true
 	case "s390x":
 		c.PtrSize = 8
-- 
2.52.0