s390x: Implement kS390_RotLeftAndClear64

src/compiler/s390/code-generator-s390.cc

 // Copyright 2015 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 "src/compiler/code-generator.h"
 
 #include "src/compilation-info.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 1229 matching lines @@
         int clearBitRight = i.InputInt32(3);
         __ rll(i.OutputRegister(), i.InputRegister(0), Operand(shiftAmount));
         __ sllg(i.OutputRegister(), i.OutputRegister(), Operand(clearBitLeft));
         __ srlg(i.OutputRegister(), i.OutputRegister(),
                 Operand((clearBitLeft + clearBitRight)));
         __ sllg(i.OutputRegister(), i.OutputRegister(), Operand(clearBitRight));
       }
       break;
 #if V8_TARGET_ARCH_S390X
     case kS390_RotLeftAndClear64:
-      UNIMPLEMENTED();  // Find correct instruction
+      if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) {
+        int shiftAmount = i.InputInt32(1);
+        int endBit = 63 - shiftAmount;
+        int startBit = 63 - i.InputInt32(2);
+        __ risbg(i.OutputRegister(), i.InputRegister(0), Operand(startBit),
+                 Operand(endBit), Operand(shiftAmount), true);
+      } else {
+        int shiftAmount = i.InputInt32(1);
+        int clearBit = 63 - i.InputInt32(2);
+        __ rllg(i.OutputRegister(), i.InputRegister(0), Operand(shiftAmount));
+        __ sllg(i.OutputRegister(), i.OutputRegister(), Operand(clearBit));
+        __ srlg(i.OutputRegister(), i.OutputRegister(),
+                Operand(clearBit + shiftAmount));
+        __ sllg(i.OutputRegister(), i.OutputRegister(), Operand(shiftAmount));
+      }
       break;
     case kS390_RotLeftAndClearLeft64:
       if (CpuFeatures::IsSupported(GENERAL_INSTR_EXT)) {
         int shiftAmount = i.InputInt32(1);
         int endBit = 63;
         int startBit = 63 - i.InputInt32(2);
         __ risbg(i.OutputRegister(), i.InputRegister(0), Operand(startBit),
                  Operand(endBit), Operand(shiftAmount), true);
       } else {
         int shiftAmount = i.InputInt32(1);
@@ skipping 1288 matching lines @@
       padding_size -= 2;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8