Add assembler test.

src/mips/constants-mips.h

Index: src/mips/constants-mips.h
diff --git a/src/mips/constants-mips.h b/src/mips/constants-mips.h
index bea688ff1ad0fb031e7229db8f3988e79854e5c2..e87e4c4b5c535d6a26fdc3a7e3c5baab957c2958 100644
--- a/src/mips/constants-mips.h
+++ b/src/mips/constants-mips.h
@@ -261,6 +261,7 @@ const int kRdShift       = 11;
 const int kRdBits        = 5;
 const int kSaShift       = 6;
 const int kSaBits        = 5;
+const int kLSASaBits = 2;
 const int kFunctionShift = 0;
 const int kFunctionBits  = 6;
 const int kLuiShift      = 16;
@@ -399,6 +400,7 @@ enum SecondaryField : uint32_t {
   SRL = ((0U << 3) + 2),
   SRA = ((0U << 3) + 3),
   SLLV = ((0U << 3) + 4),
+  LSA = ((0U << 3) + 5),
   SRLV = ((0U << 3) + 6),
   SRAV = ((0U << 3) + 7),
 
@@ -911,20 +913,21 @@ class Instruction {
       FunctionFieldToBitNumber(BREAK) | FunctionFieldToBitNumber(SLL) |
       FunctionFieldToBitNumber(SRL) | FunctionFieldToBitNumber(SRA) |
       FunctionFieldToBitNumber(SLLV) | FunctionFieldToBitNumber(SRLV) |
-      FunctionFieldToBitNumber(SRAV) | FunctionFieldToBitNumber(MFHI) |
-      FunctionFieldToBitNumber(MFLO) | FunctionFieldToBitNumber(MULT) |
-      FunctionFieldToBitNumber(MULTU) | FunctionFieldToBitNumber(DIV) |
-      FunctionFieldToBitNumber(DIVU) | FunctionFieldToBitNumber(ADD) |
-      FunctionFieldToBitNumber(ADDU) | FunctionFieldToBitNumber(SUB) |
-      FunctionFieldToBitNumber(SUBU) | FunctionFieldToBitNumber(AND) |
-      FunctionFieldToBitNumber(OR) | FunctionFieldToBitNumber(XOR) |
-      FunctionFieldToBitNumber(NOR) | FunctionFieldToBitNumber(SLT) |
-      FunctionFieldToBitNumber(SLTU) | FunctionFieldToBitNumber(TGE) |
-      FunctionFieldToBitNumber(TGEU) | FunctionFieldToBitNumber(TLT) |
-      FunctionFieldToBitNumber(TLTU) | FunctionFieldToBitNumber(TEQ) |
-      FunctionFieldToBitNumber(TNE) | FunctionFieldToBitNumber(MOVZ) |
-      FunctionFieldToBitNumber(MOVN) | FunctionFieldToBitNumber(MOVCI) |
-      FunctionFieldToBitNumber(SELEQZ_S) | FunctionFieldToBitNumber(SELNEZ_S);
+      FunctionFieldToBitNumber(SRAV) | FunctionFieldToBitNumber(LSA) |
+      FunctionFieldToBitNumber(MFHI) | FunctionFieldToBitNumber(MFLO) |
+      FunctionFieldToBitNumber(MULT) | FunctionFieldToBitNumber(MULTU) |
+      FunctionFieldToBitNumber(DIV) | FunctionFieldToBitNumber(DIVU) |
+      FunctionFieldToBitNumber(ADD) | FunctionFieldToBitNumber(ADDU) |
+      FunctionFieldToBitNumber(SUB) | FunctionFieldToBitNumber(SUBU) |
+      FunctionFieldToBitNumber(AND) | FunctionFieldToBitNumber(OR) |
+      FunctionFieldToBitNumber(XOR) | FunctionFieldToBitNumber(NOR) |
+      FunctionFieldToBitNumber(SLT) | FunctionFieldToBitNumber(SLTU) |
+      FunctionFieldToBitNumber(TGE) | FunctionFieldToBitNumber(TGEU) |
+      FunctionFieldToBitNumber(TLT) | FunctionFieldToBitNumber(TLTU) |
+      FunctionFieldToBitNumber(TEQ) | FunctionFieldToBitNumber(TNE) |
+      FunctionFieldToBitNumber(MOVZ) | FunctionFieldToBitNumber(MOVN) |
+      FunctionFieldToBitNumber(MOVCI) | FunctionFieldToBitNumber(SELEQZ_S) |
+      FunctionFieldToBitNumber(SELNEZ_S);
 
 
   // Get the encoding type of the instruction.
@@ -958,6 +961,11 @@ class Instruction {
     return Bits(kSaShift + kSaBits - 1, kSaShift);
   }
 
+  inline int LSASaValue() const {
+    DCHECK(InstructionType() == kRegisterType);
+    return Bits(kSaShift + kLSASaBits - 1, kSaShift);
+  }
+
   inline int FunctionValue() const {
     DCHECK(InstructionType() == kRegisterType ||
            InstructionType() == kImmediateType);