From: erik.corry@gmail.com <erik.corry@gmail.com@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Mon, 9 Jan 2012 13:33:59 +0000 (+0000)
Subject: Use shift and add instead of mul on ARM for integer hash.
X-Git-Tag: upstream/4.7.83~17645
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0264008354422c1cb5fde0996d6de9e4455fc553;p=platform%2Fupstream%2Fv8.git

Use shift and add instead of mul on ARM for integer hash.
Review URL: http://codereview.chromium.org/9153002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10355 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---

diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 470e322..fd9b568 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -1456,8 +1456,9 @@ void MacroAssembler::LoadFromNumberDictionary(Label* miss,
   // hash = hash ^ (hash >> 4);
   eor(t0, t0, Operand(t0, LSR, 4));
   // hash = hash * 2057;
-  mov(t1, Operand(2057));
-  mul(t0, t0, t1);
+  mov(t1, Operand(t0, LSL, 11));
+  add(t0, t0, Operand(t0, LSL, 3));
+  add(t0, t0, t1);
   // hash = hash ^ (hash >> 16);
   eor(t0, t0, Operand(t0, LSR, 16));