[ARM] Add Neon saturating add and subtract instructions.

src/arm/assembler-arm.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1356 matching lines @@
   void vneg(const QwNeonRegister dst, const QwNeonRegister src);
   void vneg(NeonSize size, const QwNeonRegister dst, const QwNeonRegister src);
   void veor(DwVfpRegister dst, DwVfpRegister src1, DwVfpRegister src2);
   void vand(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vbsl(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void veor(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vorr(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vadd(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vadd(NeonSize size, QwNeonRegister dst, QwNeonRegister src1,
             QwNeonRegister src2);
+  void vqadd(NeonDataType dt, QwNeonRegister dst, QwNeonRegister src1,
+             QwNeonRegister src2);
   void vsub(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vsub(NeonSize size, QwNeonRegister dst, QwNeonRegister src1,
             QwNeonRegister src2);
+  void vqsub(NeonDataType dt, QwNeonRegister dst, QwNeonRegister src1,
+             QwNeonRegister src2);
   void vmul(QwNeonRegister dst, QwNeonRegister src1,
             QwNeonRegister src2);
   void vmul(NeonSize size, QwNeonRegister dst, QwNeonRegister src1,
             QwNeonRegister src2);
   void vmin(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vmin(NeonDataType dt, QwNeonRegister dst,
             QwNeonRegister src1, QwNeonRegister src2);
   void vmax(QwNeonRegister dst, QwNeonRegister src1, QwNeonRegister src2);
   void vmax(NeonDataType dt, QwNeonRegister dst,
             QwNeonRegister src1, QwNeonRegister src2);
@@ skipping 426 matching lines @@
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ARM_ASSEMBLER_ARM_H_