From ff8603d7a2e51d2fd497493dfad7d4c8c7ee8d74 Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Tue, 12 May 2020 12:40:10 +0800
Subject: Bug 1390459 - mulby3 function implement error on mips platform

Tag: #1542
---
 js/src/jit/mips32/MacroAssembler-mips32-inl.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'js/src/jit/mips32/MacroAssembler-mips32-inl.h')

diff --git a/js/src/jit/mips32/MacroAssembler-mips32-inl.h b/js/src/jit/mips32/MacroAssembler-mips32-inl.h
index 4331e050e..a86cead29 100644
--- a/js/src/jit/mips32/MacroAssembler-mips32-inl.h
+++ b/js/src/jit/mips32/MacroAssembler-mips32-inl.h
@@ -302,8 +302,9 @@ MacroAssembler::neg64(Register64 reg)
 void
 MacroAssembler::mulBy3(Register src, Register dest)
 {
-    as_addu(dest, src, src);
-    as_addu(dest, dest, src);
+    MOZ_ASSERT(src != ScratchRegister);
+    as_addu(ScratchRegister, src, src);
+    as_addu(dest, ScratchRegister, src);
 }
 
 void
-- 
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