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cpu: add support for detecting cpu features on loong64

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Except for lasx, all other features have been implemented
in the Go mainline.

Change-Id: I61a09396ed23d17991b641a1265e952585cb5636
Reviewed-on: https://go-review.googlesource.com/c/sys/+/655355
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: sophie zhao <zhaoxiaolin@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
This commit is contained in:
Guoqi Chen
2025-03-11 18:36:47 -07:00
committed by abner chenc
parent f2ce62c21a
commit b8f7da6c5a
6 changed files with 93 additions and 1 deletions
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cpu/cpu_loong64.s
+12
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// Copyright 2025 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.
#include "textflag.h"
// func get_cpucfg(reg uint32) uint32
TEXT ·get_cpucfg(SB), NOSPLIT|NOFRAME, $0
MOVW reg+0(FP), R5
CPUCFG R5, R4
MOVW R4, ret+8(FP)
RET