From feae743bdbb7dc4b9d053117dbea494202d6a2de Mon Sep 17 00:00:00 2001
From: Xiaolin Zhao <zhaoxiaolin@loongson.cn>
Date: Tue, 18 Nov 2025 13:00:15 +0800
Subject: cmd/compile: use 32x32->64 multiplies on loong64

Gets rid of some sign extensions, like arm64.

Change-Id: I9fc37e15a82718bfcf53db8cab0c4e7baaa0a747
Reviewed-on: https://go-review.googlesource.com/c/go/+/721522
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Meidan Li <limeidan@loongson.cn>
Reviewed-by: Mark Freeman <markfreeman@google.com>
Reviewed-by: abner chenc <chenguoqi@loongson.cn>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
---
 test/codegen/arithmetic.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'test/codegen')

diff --git a/test/codegen/arithmetic.go b/test/codegen/arithmetic.go
index 29764bf817..7cc6cf77e1 100644
--- a/test/codegen/arithmetic.go
+++ b/test/codegen/arithmetic.go
@@ -335,11 +335,13 @@ func Fold2NegMul(a, b int) int {
 
 func Mul32(a, b int32) int64 {
 	// arm64:"SMULL" -"MOVW"
+	// loong64:"MULWVW" -"MOVW"
 	return int64(a) * int64(b)
 }
 
 func Mul32U(a, b uint32) uint64 {
 	// arm64:"UMULL" -"MOVWU"
+	// loong64:"MULWVWU" -"MOVWU"
 	return uint64(a) * uint64(b)
 }
 
-- 
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