[turbofan] introduce Int32/64AbsWithOverflow optional operator

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 291 matching lines @@
     // fall through
     case kSignedGreaterThan:
       return gt;
     case kOverflow:
       // Overflow checked for AddP/SubP only.
       switch (op) {
         case kS390_Add32:
         case kS390_Add64:
         case kS390_Sub32:
         case kS390_Sub64:
+        case kS390_Abs64:
+        case kS390_Abs32:
           return overflow;
         default:
           break;
       }
       break;
     case kNotOverflow:
       switch (op) {
         case kS390_Add32:
         case kS390_Add64:
         case kS390_Sub32:
@@ skipping 1018 matching lines @@
       __ bind(ool->exit());
       break;
     }
     case kArchStackSlot: {
       FrameOffset offset =
           frame_access_state()->GetFrameOffset(i.InputInt32(0));
       __ AddP(i.OutputRegister(), offset.from_stack_pointer() ? sp : fp,
               Operand(offset.offset()));
       break;
     }
+    case kS390_Abs32:
+      // TODO(john.yan): zero-ext
+      __ lpr(i.OutputRegister(0), i.InputRegister(0));
+      break;
+    case kS390_Abs64:
+      __ lpgr(i.OutputRegister(0), i.InputRegister(0));
+      break;
     case kS390_And32:
       // zero-ext
       if (CpuFeatures::IsSupported(DISTINCT_OPS)) {
         ASSEMBLE_BIN32_OP(RRRInstr(nrk), RM32Instr(And), RIInstr(nilf));
       } else {
         ASSEMBLE_BIN32_OP(RRInstr(nr), RM32Instr(And), RIInstr(nilf));
       }
       break;
     case kS390_And64:
       if (CpuFeatures::IsSupported(DISTINCT_OPS)) {
@@ skipping 488 matching lines @@
       // __ cebr(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
       break;
     case kS390_CmpDouble:
       ASSEMBLE_FLOAT_COMPARE(cdbr, cdb, ldy);
       // __ cdbr(i.InputDoubleRegister(0), i.InputDoubleRegister(1));
       break;
     case kS390_Tst32:
       if (HasRegisterInput(instr, 1)) {
         __ And(r0, i.InputRegister(0), i.InputRegister(1));
       } else {
+        // detect tmlh/tmhl/tmhh case
         Operand opnd = i.InputImmediate(1);
         if (is_uint16(opnd.immediate())) {
           __ tmll(i.InputRegister(0), opnd);
         } else {
           __ lr(r0, i.InputRegister(0));
           __ nilf(r0, opnd);
         }
       }
       break;
     case kS390_Tst64:
@@ skipping 1093 matching lines @@
       padding_size -= 2;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8