--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/arm/vm/interpreterRT_arm.cpp	Mon Dec 19 12:39:01 2016 -0500
@@ -0,0 +1,449 @@
+/*
+ * Copyright (c) 2008, 2015, Oracle and/or its affiliates. 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "interpreter/interpreter.hpp"
+#include "interpreter/interpreterRuntime.hpp"
+#include "memory/allocation.inline.hpp"
+#include "memory/universe.inline.hpp"
+#include "oops/method.hpp"
+#include "oops/oop.inline.hpp"
+#include "runtime/handles.inline.hpp"
+#include "runtime/icache.hpp"
+#include "runtime/interfaceSupport.hpp"
+#include "runtime/signature.hpp"
+
+#define __ _masm->
+
+#ifdef SHARING_FAST_NATIVE_FINGERPRINTS
+// mapping from SignatureIterator param to (common) type of parsing
+static const u1 shared_type[] = {
+  (u1) SignatureIterator::int_parm, // bool
+  (u1) SignatureIterator::int_parm, // byte
+  (u1) SignatureIterator::int_parm, // char
+  (u1) SignatureIterator::int_parm, // short
+  (u1) SignatureIterator::int_parm, // int
+  (u1) SignatureIterator::long_parm, // long
+#ifndef __ABI_HARD__
+  (u1) SignatureIterator::int_parm, // float, passed as int
+  (u1) SignatureIterator::long_parm, // double, passed as long
+#else
+  (u1) SignatureIterator::float_parm, // float
+  (u1) SignatureIterator::double_parm, // double
+#endif
+  (u1) SignatureIterator::obj_parm, // obj
+  (u1) SignatureIterator::done_parm // done
+};
+
+uint64_t InterpreterRuntime::normalize_fast_native_fingerprint(uint64_t fingerprint) {
+  if (fingerprint == UCONST64(-1)) {
+    // special signature used when the argument list cannot be encoded in a 64 bits value
+    return fingerprint;
+  }
+  int shift = SignatureIterator::static_feature_size;
+  uint64_t result = fingerprint & ((1 << shift) - 1);
+  fingerprint >>= shift;
+
+  BasicType ret_type = (BasicType) (fingerprint & SignatureIterator::result_feature_mask);
+  // For ARM, the fast signature handler only needs to know whether
+  // the return value must be unboxed. T_OBJECT and T_ARRAY need not
+  // be distinguished from each other and all other return values
+  // behave like integers with respect to the handler.
+  bool unbox = (ret_type == T_OBJECT) || (ret_type == T_ARRAY);
+  if (unbox) {
+    ret_type = T_OBJECT;
+  } else {
+    ret_type = T_INT;
+  }
+  result |= ((uint64_t) ret_type) << shift;
+  shift += SignatureIterator::result_feature_size;
+  fingerprint >>= SignatureIterator::result_feature_size;
+
+  while (true) {
+    uint32_t type = (uint32_t) (fingerprint & SignatureIterator::parameter_feature_mask);
+    if (type == SignatureIterator::done_parm) {
+      result |= ((uint64_t) SignatureIterator::done_parm) << shift;
+      return result;
+    }
+    assert((type >= SignatureIterator::bool_parm) && (type <= SignatureIterator::obj_parm), "check fingerprint encoding");
+    int shared = shared_type[type - SignatureIterator::bool_parm];
+    result |= ((uint64_t) shared) << shift;
+    shift += SignatureIterator::parameter_feature_size;
+    fingerprint >>= SignatureIterator::parameter_feature_size;
+  }
+}
+#endif // SHARING_FAST_NATIVE_FINGERPRINTS
+
+// Implementation of SignatureHandlerGenerator
+void InterpreterRuntime::SignatureHandlerGenerator::pass_int() {
+  if (_ireg < GPR_PARAMS) {
+    Register dst = as_Register(_ireg);
+    __ ldr_s32(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    _ireg++;
+  } else {
+    __ ldr_s32(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ str_32(Rtemp, Address(SP, _abi_offset * wordSize));
+    _abi_offset++;
+  }
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::pass_long() {
+#ifdef AARCH64
+  if (_ireg < GPR_PARAMS) {
+    Register dst = as_Register(_ireg);
+    __ ldr(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset() + 1)));
+    _ireg++;
+  } else {
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset() + 1)));
+    __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+    _abi_offset++;
+  }
+#else
+  if (_ireg <= 2) {
+#if (ALIGN_WIDE_ARGUMENTS == 1)
+    if ((_ireg & 1) != 0) {
+      // 64-bit values should be 8-byte aligned
+      _ireg++;
+    }
+#endif
+    Register dst1 = as_Register(_ireg);
+    Register dst2 = as_Register(_ireg+1);
+    __ ldr(dst1, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1)));
+    __ ldr(dst2, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    _ireg += 2;
+#if (ALIGN_WIDE_ARGUMENTS == 0)
+  } else if (_ireg == 3) {
+    // uses R3 + one stack slot
+    Register dst1 = as_Register(_ireg);
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ ldr(dst1, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1)));
+    __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+    _ireg += 1;
+    _abi_offset += 1;
+#endif
+  } else {
+#if (ALIGN_WIDE_ARGUMENTS == 1)
+    if(_abi_offset & 1) _abi_offset++;
+#endif
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1)));
+    __ str(Rtemp, Address(SP, (_abi_offset) * wordSize));
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ str(Rtemp, Address(SP, (_abi_offset+1) * wordSize));
+    _abi_offset += 2;
+    _ireg = 4;
+  }
+#endif // AARCH64
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::pass_object() {
+#ifdef AARCH64
+  __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+  __ cmp(Rtemp, 0);
+  __ sub(Rtemp, Rlocals, -Interpreter::local_offset_in_bytes(offset()));
+  if (_ireg < GPR_PARAMS) {
+    Register dst = as_Register(_ireg);
+    __ csel(dst, ZR, Rtemp, eq);
+    _ireg++;
+  } else {
+    __ csel(Rtemp, ZR, Rtemp, eq);
+    __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+    _abi_offset++;
+  }
+#else
+  if (_ireg < 4) {
+    Register dst = as_Register(_ireg);
+    __ ldr(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ cmp(dst, 0);
+    __ sub(dst, Rlocals, -Interpreter::local_offset_in_bytes(offset()), ne);
+    _ireg++;
+  } else {
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ cmp(Rtemp, 0);
+    __ sub(Rtemp, Rlocals, -Interpreter::local_offset_in_bytes(offset()), ne);
+    __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+    _abi_offset++;
+  }
+#endif // AARCH64
+}
+
+#ifndef __ABI_HARD__
+void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
+  if (_ireg < 4) {
+    Register dst = as_Register(_ireg);
+    __ ldr(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    _ireg++;
+  } else {
+    __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+    __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+    _abi_offset++;
+  }
+}
+
+#else
+#ifndef __SOFTFP__
+void InterpreterRuntime::SignatureHandlerGenerator::pass_float() {
+#ifdef AARCH64
+    if (_freg < FPR_PARAMS) {
+      FloatRegister dst = as_FloatRegister(_freg);
+      __ ldr_s(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+      _freg++;
+    } else {
+      __ ldr_u32(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+      __ str_32(Rtemp, Address(SP, _abi_offset * wordSize));
+      _abi_offset++;
+    }
+#else
+    if((_fp_slot < 16) || (_single_fpr_slot & 1)) {
+      if ((_single_fpr_slot & 1) == 0) {
+        _single_fpr_slot = _fp_slot;
+        _fp_slot += 2;
+      }
+      __ flds(as_FloatRegister(_single_fpr_slot), Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+      _single_fpr_slot++;
+    } else {
+      __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+      __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+      _abi_offset++;
+    }
+#endif // AARCH64
+}
+
+void InterpreterRuntime::SignatureHandlerGenerator::pass_double() {
+#ifdef AARCH64
+    if (_freg < FPR_PARAMS) {
+      FloatRegister dst = as_FloatRegister(_freg);
+      __ ldr_d(dst, Address(Rlocals, Interpreter::local_offset_in_bytes(offset() + 1)));
+      _freg++;
+    } else {
+      __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset() + 1)));
+      __ str(Rtemp, Address(SP, _abi_offset * wordSize));
+      _abi_offset++;
+    }
+#else
+    if(_fp_slot <= 14) {
+      __ fldd(as_FloatRegister(_fp_slot), Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1)));
+      _fp_slot += 2;
+    } else {
+      __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset()+1)));
+      __ str(Rtemp, Address(SP, (_abi_offset) * wordSize));
+      __ ldr(Rtemp, Address(Rlocals, Interpreter::local_offset_in_bytes(offset())));
+      __ str(Rtemp, Address(SP, (_abi_offset+1) * wordSize));
+      _abi_offset += 2;
+      _single_fpr_slot = 16;
+    }
+#endif // AARCH64
+}
+#endif // __SOFTFP__
+#endif // __ABI_HARD__
+
+void InterpreterRuntime::SignatureHandlerGenerator::generate(uint64_t fingerprint) {
+  iterate(fingerprint);
+
+  BasicType result_type = SignatureIterator::return_type(fingerprint);
+
+  address result_handler = Interpreter::result_handler(result_type);
+
+#ifdef AARCH64
+  __ mov_slow(R0, (address)result_handler);
+#else
+  // Check that result handlers are not real handler on ARM (0 or -1).
+  // This ensures the signature handlers do not need symbolic information.
+  assert((result_handler == NULL)||(result_handler==(address)0xffffffff),"");
+  __ mov_slow(R0, (intptr_t)result_handler);
+#endif
+
+  __ ret();
+}
+
+
+// Implementation of SignatureHandlerLibrary
+
+void SignatureHandlerLibrary::pd_set_handler(address handler) {}
+
+class SlowSignatureHandler: public NativeSignatureIterator {
+ private:
+  address   _from;
+  intptr_t* _to;
+
+#ifndef __ABI_HARD__
+  virtual void pass_int() {
+    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    _from -= Interpreter::stackElementSize;
+  }
+
+  virtual void pass_float() {
+    *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    _from -= Interpreter::stackElementSize;
+  }
+
+  virtual void pass_long() {
+#if (ALIGN_WIDE_ARGUMENTS == 1)
+    if (((intptr_t)_to & 7) != 0) {
+      // 64-bit values should be 8-byte aligned
+      _to++;
+    }
+#endif
+    _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+    _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
+    _to += 2;
+    _from -= 2*Interpreter::stackElementSize;
+  }
+
+  virtual void pass_object() {
+    intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
+    *_to++ = (*(intptr_t*)from_addr == 0) ? (intptr_t)NULL : from_addr;
+    _from -= Interpreter::stackElementSize;
+   }
+
+#else
+
+  intptr_t* _toFP;
+  intptr_t* _toGP;
+  int       _last_gp;
+  int       _last_fp;
+#ifndef AARCH64
+  int       _last_single_fp;
+#endif // !AARCH64
+
+  virtual void pass_int() {
+    if(_last_gp < GPR_PARAMS) {
+      _toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    } else {
+      *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    }
+    _from -= Interpreter::stackElementSize;
+  }
+
+  virtual void pass_long() {
+#ifdef AARCH64
+    if(_last_gp < GPR_PARAMS) {
+      _toGP[_last_gp++] = *(jlong *)(_from+Interpreter::local_offset_in_bytes(1));
+    } else {
+      *_to++ = *(jlong *)(_from+Interpreter::local_offset_in_bytes(1));
+    }
+#else
+    assert(ALIGN_WIDE_ARGUMENTS == 1, "ABI_HARD not supported with unaligned wide arguments");
+    if (_last_gp <= 2) {
+      if(_last_gp & 1) _last_gp++;
+      _toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(1));
+      _toGP[_last_gp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    } else {
+      if (((intptr_t)_to & 7) != 0) {
+        // 64-bit values should be 8-byte aligned
+        _to++;
+      }
+      _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+      _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
+      _to += 2;
+      _last_gp = 4;
+    }
+#endif // AARCH64
+    _from -= 2*Interpreter::stackElementSize;
+  }
+
+  virtual void pass_object() {
+    intptr_t from_addr = (intptr_t)(_from + Interpreter::local_offset_in_bytes(0));
+    if(_last_gp < GPR_PARAMS) {
+      _toGP[_last_gp++] = (*(intptr_t*)from_addr == 0) ? NULL : from_addr;
+    } else {
+      *_to++ = (*(intptr_t*)from_addr == 0) ? NULL : from_addr;
+    }
+    _from -= Interpreter::stackElementSize;
+  }
+
+  virtual void pass_float() {
+#ifdef AARCH64
+    if(_last_fp < FPR_PARAMS) {
+      _toFP[_last_fp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    } else {
+      *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    }
+#else
+    if((_last_fp < 16) || (_last_single_fp & 1)) {
+      if ((_last_single_fp & 1) == 0) {
+        _last_single_fp = _last_fp;
+        _last_fp += 2;
+      }
+
+      _toFP[_last_single_fp++] = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    } else {
+      *_to++ = *(jint *)(_from+Interpreter::local_offset_in_bytes(0));
+    }
+#endif // AARCH64
+    _from -= Interpreter::stackElementSize;
+  }
+
+  virtual void pass_double() {
+#ifdef AARCH64
+    if(_last_fp < FPR_PARAMS) {
+      _toFP[_last_fp++] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+    } else {
+      *_to++ = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+    }
+#else
+    assert(ALIGN_WIDE_ARGUMENTS == 1, "ABI_HARD not supported with unaligned wide arguments");
+    if(_last_fp <= 14) {
+      _toFP[_last_fp++] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+      _toFP[_last_fp++] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
+    } else {
+      if (((intptr_t)_to & 7) != 0) {      // 64-bit values should be 8-byte aligned
+        _to++;
+      }
+      _to[0] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(1));
+      _to[1] = *(intptr_t*)(_from+Interpreter::local_offset_in_bytes(0));
+      _to += 2;
+      _last_single_fp = 16;
+    }
+#endif // AARCH64
+    _from -= 2*Interpreter::stackElementSize;
+  }
+
+#endif // !__ABI_HARD__
+
+ public:
+  SlowSignatureHandler(methodHandle method, address from, intptr_t* to) :
+    NativeSignatureIterator(method) {
+    _from = from;
+
+#ifdef __ABI_HARD__
+    _toGP  = to;
+    _toFP = _toGP + GPR_PARAMS;
+    _to   = _toFP + AARCH64_ONLY(FPR_PARAMS) NOT_AARCH64(8*2);
+    _last_gp = (is_static() ? 2 : 1);
+    _last_fp = 0;
+#ifndef AARCH64
+    _last_single_fp = 0;
+#endif // !AARCH64
+#else
+    _to   = to + (is_static() ? 2 : 1);
+#endif // __ABI_HARD__
+  }
+};
+
+IRT_ENTRY(address, InterpreterRuntime::slow_signature_handler(JavaThread* thread, Method* method, intptr_t* from, intptr_t* to))
+  methodHandle m(thread, (Method*)method);
+  assert(m->is_native(), "sanity check");
+  SlowSignatureHandler(m, (address)from, to).iterate(UCONST64(-1));
+  return Interpreter::result_handler(m->result_type());
+IRT_END