src/cpu/aarch64/vm/stubGenerator_aarch64.cpp

rev 8067 : 8077615: AARCH64: Add C2 intrinsic for BigInteger::multiplyToLen() method
Summary: Add C2 intrinsic for BigInteger::multiplyToLen() on AArch64.
Reviewed-by: kvn

*** 1,8 ****
  /*
   * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
--- 1,8 ----
  /*
   * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
!  * Copyright (c) 2014, 2015, Red Hat Inc. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.
*** 2354,2365 ****
      __ ret(lr);
  
      return start;
    }
  
! #undef __
! #define __ masm->
  
    // Continuation point for throwing of implicit exceptions that are
    // not handled in the current activation. Fabricates an exception
    // oop and initiates normal exception dispatching in this
    // frame. Since we need to preserve callee-saved values (currently
--- 2354,2402 ----
      __ ret(lr);
  
      return start;
    }
  
!   /**
!    *  Arguments:
!    *
!    *  Input:
!    *    c_rarg0   - x address
!    *    c_rarg1   - x length
!    *    c_rarg2   - y address
!    *    c_rarg3   - y lenth
!    *    c_rarg4   - z address
!    *    c_rarg5   - z length
!    */
!   address generate_multiplyToLen() {
!     __ align(CodeEntryAlignment);
!     StubCodeMark mark(this, "StubRoutines", "multiplyToLen");
! 
!     address start = __ pc();
!     const Register x     = r0;
!     const Register xlen  = r1;
!     const Register y     = r2;
!     const Register ylen  = r3;
!     const Register z     = r4;
!     const Register zlen  = r5;
! 
!     const Register tmp1  = r10;
!     const Register tmp2  = r11;
!     const Register tmp3  = r12;
!     const Register tmp4  = r13;
!     const Register tmp5  = r14;
!     const Register tmp6  = r15;
!     const Register tmp7  = r16;
! 
!     BLOCK_COMMENT("Entry:");
!     __ enter(); // required for proper stackwalking of RuntimeStub frame
!     __ multiply_to_len(x, xlen, y, ylen, z, zlen, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7);
!     __ leave(); // required for proper stackwalking of RuntimeStub frame
!     __ ret(lr);
! 
!     return start;
!   }
  
    // Continuation point for throwing of implicit exceptions that are
    // not handled in the current activation. Fabricates an exception
    // oop and initiates normal exception dispatching in this
    // frame. Since we need to preserve callee-saved values (currently
*** 2373,2382 ****
--- 2410,2422 ----
    // implicit exceptions (e.g., NullPointerException or
    // AbstractMethodError on entry) are either at call sites or
    // otherwise assume that stack unwinding will be initiated, so
    // caller saved registers were assumed volatile in the compiler.
  
+ #undef __
+ #define __ masm->
+ 
    address generate_throw_exception(const char* name,
                                     address runtime_entry,
                                     Register arg1 = noreg,
                                     Register arg2 = noreg) {
      // Information about frame layout at time of blocking runtime call.
*** 2516,2525 ****
--- 2556,2569 ----
                                                  throw_NullPointerException_at_call));
  
      // arraycopy stubs used by compilers
      generate_arraycopy_stubs();
  
+     if (UseMultiplyToLenIntrinsic) {
+       StubRoutines::_multiplyToLen = generate_multiplyToLen();
+     }
+ 
  #ifndef BUILTIN_SIM
      if (UseAESIntrinsics) {
        StubRoutines::_aescrypt_encryptBlock = generate_aescrypt_encryptBlock();
        StubRoutines::_aescrypt_decryptBlock = generate_aescrypt_decryptBlock();
        StubRoutines::_cipherBlockChaining_encryptAESCrypt = generate_cipherBlockChaining_encryptAESCrypt();