[arm] Implement Float(32|64)(Min|Max) using vsel.

src/arm/disasm-arm.cc

 // Copyright 2011 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.
 
 // A Disassembler object is used to disassemble a block of code instruction by
 // instruction. The default implementation of the NameConverter object can be
 // overriden to modify register names or to do symbol lookup on addresses.
 //
 // The example below will disassemble a block of code and print it to stdout.
 //
@@ skipping 1851 matching lines @@
             }
             break;
           default:
             UNREACHABLE();  // Case analysis is exhaustive.
             break;
         }
       } else {
         Unknown(instr);
       }
       break;
+    case 0x1C:
+      if ((instr->Bits(11, 9) == 0x5) && (instr->Bit(6) == 0) &&
+          (instr->Bit(4) == 0)) {
+        // VSEL* (floating-point)
+        bool dp_operation = (instr->SzValue() == 1);
+        switch (instr->Bits(21, 20)) {
+          case 0x0:
+            if (dp_operation) {
+              Format(instr, "vseleq.f64 'Dd, 'Dn, 'Dm");
+            } else {
+              Format(instr, "vseleq.f32 'Sd, 'Sn, 'Sm");
+            }
+            break;
+          case 0x1:
+            if (dp_operation) {
+              Format(instr, "vselvs.f64 'Dd, 'Dn, 'Dm");
+            } else {
+              Format(instr, "vselvs.f32 'Sd, 'Sn, 'Sm");
+            }
+            break;
+          case 0x2:
+            if (dp_operation) {
+              Format(instr, "vselge.f64 'Dd, 'Dn, 'Dm");
+            } else {
+              Format(instr, "vselge.f32 'Sd, 'Sn, 'Sm");
+            }
+            break;
+          case 0x3:
+            if (dp_operation) {
+              Format(instr, "vselgt.f64 'Dd, 'Dn, 'Dm");
+            } else {
+              Format(instr, "vselgt.f32 'Sd, 'Sn, 'Sm");
+            }
+            break;
+          default:
+            UNREACHABLE();  // Case analysis is exhaustive.
+            break;
+        }
+      } else {
+        Unknown(instr);
+      }
+      break;
     default:
       Unknown(instr);
       break;
   }
 }
 
 #undef VERIFIY
 
 bool Decoder::IsConstantPoolAt(byte* instr_ptr) {
   int instruction_bits = *(reinterpret_cast<int*>(instr_ptr));
@@ skipping 152 matching lines @@
     v8::internal::PrintF(
         f, "%p    %08x      %s\n",
         prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_ARM