Add assembler test.

src/mips/macro-assembler-mips.cc

 
 // Copyright 2012 the V8 project 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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS
 
 #include "src/base/bits.h"
@@ skipping 1034 matching lines @@
 
 void MacroAssembler::Pref(int32_t hint, const MemOperand& rs) {
   if (IsMipsArchVariant(kLoongson)) {
     lw(zero_reg, rs);
   } else {
     pref(hint, rs);
   }
 }
 
 
+void MacroAssembler::Lsa(Register rd, Register rt, Register rs, uint8_t sa,
+                         Register scratch) {
+  if (IsMipsArchVariant(kMips32r6) && sa <= 4) {
+    lsa(rd, rt, rs, sa);
+  } else {
+    Register tmp = rd.is(rt) ? scratch : rd;
+    DCHECK(!tmp.is(rt));
+    sll(tmp, rs, sa);
+    Addu(rd, rt, tmp);
+  }
+}
+
+
 // ------------Pseudo-instructions-------------
 
 void MacroAssembler::Ulw(Register rd, const MemOperand& rs) {
   lwr(rd, rs);
   lwl(rd, MemOperand(rs.rm(), rs.offset() + 3));
 }
 
 
 void MacroAssembler::Usw(Register rd, const MemOperand& rs) {
   swr(rd, rs);
@@ skipping 4688 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS