MIPS: Use shift and add instead of mul on ARM for integer hash.

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index 56930699e5d8628db22b23cf1f9ff41bb7998865..141d2a840badc9c5af598dbf8eeb3980f81dd57e 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -444,8 +444,10 @@ void MacroAssembler::GetNumberHash(Register reg0, Register scratch) {
   xor_(reg0, reg0, at);
 
   // hash = hash * 2057;
-  li(scratch, Operand(2057));
-  mul(reg0, reg0, scratch);
+  sll(scratch, reg0, 11);
+  sll(at, reg0, 3);
+  addu(reg0, reg0, at);
+  addu(reg0, reg0, scratch);
 
   // hash = hash ^ (hash >> 16);
   srl(at, reg0, 16);