jdk8-mips64-public/hotspot: src/share/vm/runtime/stubRoutines.cpp@76af788b6c16 (annotated)

src/share/vm/runtime/stubRoutines.cpp@76af788b6c16 (annotated)

src/share/vm/runtime/stubRoutines.cpp

Fri, 05 Sep 2014 12:36:37 -0700

author: jcoomes
date: Fri, 05 Sep 2014 12:36:37 -0700
changeset 7122: 76af788b6c16
parent 7027: b20a35eae442
child 7152: 166d744df0de
permissions: -rw-r--r--

8057623: add an extension class for argument handling
Reviewed-by: brutisso, mgerdin, tschatzl

 /*
  * Copyright (c) 1997, 2014, 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 "asm/codeBuffer.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/interfaceSupport.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "runtime/timer.hpp"
 #include "utilities/copy.hpp"
 #ifdef COMPILER2
 #include "opto/runtime.hpp"
 #endif
 // Implementation of StubRoutines - for a description
 // of how to extend it, see the header file.
 // Class Variables
 BufferBlob* StubRoutines::_code1                                = NULL;
 BufferBlob* StubRoutines::_code2                                = NULL;
 address StubRoutines::_call_stub_return_address                 = NULL;
 address StubRoutines::_call_stub_entry                          = NULL;
 address StubRoutines::_catch_exception_entry                    = NULL;
 address StubRoutines::_forward_exception_entry                  = NULL;
 address StubRoutines::_throw_AbstractMethodError_entry          = NULL;
 address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
 address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
 address StubRoutines::_throw_StackOverflowError_entry           = NULL;
 address StubRoutines::_handler_for_unsafe_access_entry          = NULL;
 jint    StubRoutines::_verify_oop_count                         = 0;
 address StubRoutines::_verify_oop_subroutine_entry              = NULL;
 address StubRoutines::_atomic_xchg_entry                        = NULL;
 address StubRoutines::_atomic_xchg_ptr_entry                    = NULL;
 address StubRoutines::_atomic_store_entry                       = NULL;
 address StubRoutines::_atomic_store_ptr_entry                   = NULL;
 address StubRoutines::_atomic_cmpxchg_entry                     = NULL;
 address StubRoutines::_atomic_cmpxchg_ptr_entry                 = NULL;
 address StubRoutines::_atomic_cmpxchg_long_entry                = NULL;
 address StubRoutines::_atomic_add_entry                         = NULL;
 address StubRoutines::_atomic_add_ptr_entry                     = NULL;
 address StubRoutines::_fence_entry                              = NULL;
 address StubRoutines::_d2i_wrapper                              = NULL;
 address StubRoutines::_d2l_wrapper                              = NULL;
 jint    StubRoutines::_fpu_cntrl_wrd_std                        = 0;
 jint    StubRoutines::_fpu_cntrl_wrd_24                         = 0;
 jint    StubRoutines::_fpu_cntrl_wrd_64                         = 0;
 jint    StubRoutines::_fpu_cntrl_wrd_trunc                      = 0;
 jint    StubRoutines::_mxcsr_std                                = 0;
 jint    StubRoutines::_fpu_subnormal_bias1[3]                   = { 0, 0, 0 };
 jint    StubRoutines::_fpu_subnormal_bias2[3]                   = { 0, 0, 0 };
 // Compiled code entry points default values
 // The default functions don't have separate disjoint versions.
 address StubRoutines::_jbyte_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
 address StubRoutines::_jshort_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
 address StubRoutines::_jint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
 address StubRoutines::_jlong_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
 address StubRoutines::_oop_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
 address StubRoutines::_oop_arraycopy_uninit     = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
 address StubRoutines::_jbyte_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
 address StubRoutines::_jshort_disjoint_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
 address StubRoutines::_jint_disjoint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
 address StubRoutines::_jlong_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
 address StubRoutines::_oop_disjoint_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
 address StubRoutines::_oop_disjoint_arraycopy_uninit     = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy_uninit);
 address StubRoutines::_arrayof_jbyte_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
 address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
 address StubRoutines::_arrayof_jint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
 address StubRoutines::_arrayof_jlong_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
 address StubRoutines::_arrayof_oop_arraycopy    = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
 address StubRoutines::_arrayof_oop_arraycopy_uninit      = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
 address StubRoutines::_arrayof_jbyte_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
 address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
 address StubRoutines::_arrayof_jint_disjoint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
 address StubRoutines::_arrayof_jlong_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
 address StubRoutines::_arrayof_oop_disjoint_arraycopy    = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
 address StubRoutines::_arrayof_oop_disjoint_arraycopy_uninit  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy_uninit);
 address StubRoutines::_zero_aligned_words = CAST_FROM_FN_PTR(address, Copy::zero_to_words);
 address StubRoutines::_checkcast_arraycopy               = NULL;
 address StubRoutines::_checkcast_arraycopy_uninit        = NULL;
 address StubRoutines::_unsafe_arraycopy                  = NULL;
 address StubRoutines::_generic_arraycopy                 = NULL;
 address StubRoutines::_jbyte_fill;
 address StubRoutines::_jshort_fill;
 address StubRoutines::_jint_fill;
 address StubRoutines::_arrayof_jbyte_fill;
 address StubRoutines::_arrayof_jshort_fill;
 address StubRoutines::_arrayof_jint_fill;
 address StubRoutines::_aescrypt_encryptBlock               = NULL;
 address StubRoutines::_aescrypt_decryptBlock               = NULL;
 address StubRoutines::_cipherBlockChaining_encryptAESCrypt = NULL;
 address StubRoutines::_cipherBlockChaining_decryptAESCrypt = NULL;
 address StubRoutines::_sha1_implCompress     = NULL;
 address StubRoutines::_sha1_implCompressMB   = NULL;
 address StubRoutines::_sha256_implCompress   = NULL;
 address StubRoutines::_sha256_implCompressMB = NULL;
 address StubRoutines::_sha512_implCompress   = NULL;
 address StubRoutines::_sha512_implCompressMB = NULL;
 address StubRoutines::_updateBytesCRC32 = NULL;
 address StubRoutines::_crc_table_adr = NULL;
 double (* StubRoutines::_intrinsic_log   )(double) = NULL;
 double (* StubRoutines::_intrinsic_log10 )(double) = NULL;
 double (* StubRoutines::_intrinsic_exp   )(double) = NULL;
 double (* StubRoutines::_intrinsic_pow   )(double, double) = NULL;
 double (* StubRoutines::_intrinsic_sin   )(double) = NULL;
 double (* StubRoutines::_intrinsic_cos   )(double) = NULL;
 double (* StubRoutines::_intrinsic_tan   )(double) = NULL;
 address StubRoutines::_safefetch32_entry                 = NULL;
 address StubRoutines::_safefetch32_fault_pc              = NULL;
 address StubRoutines::_safefetch32_continuation_pc       = NULL;
 address StubRoutines::_safefetchN_entry                  = NULL;
 address StubRoutines::_safefetchN_fault_pc               = NULL;
 address StubRoutines::_safefetchN_continuation_pc        = NULL;
 // Initialization
 //
 // Note: to break cycle with universe initialization, stubs are generated in two phases.
 // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
 // The second phase includes all other stubs (which may depend on universe being initialized.)
 extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
 void StubRoutines::initialize1() {
   if (_code1 == NULL) {
     ResourceMark rm;
     TraceTime timer("StubRoutines generation 1", TraceStartupTime);
     _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
     if (_code1 == NULL) {
       vm_exit_out_of_memory(code_size1, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (1)");
     }
     CodeBuffer buffer(_code1);
     StubGenerator_generate(&buffer, false);
   }
 }
 #ifdef ASSERT
 typedef void (*arraycopy_fn)(address src, address dst, int count);
 // simple tests of generated arraycopy functions
 static void test_arraycopy_func(address func, int alignment) {
   int v = 0xcc;
   int v2 = 0x11;
   jlong lbuffer[8];
   jlong lbuffer2[8];
   address fbuffer  = (address) lbuffer;
   address fbuffer2 = (address) lbuffer2;
   unsigned int i;
   for (i = 0; i < sizeof(lbuffer); i++) {
     fbuffer[i] = v; fbuffer2[i] = v2;
   }
   // C++ does not guarantee jlong[] array alignment to 8 bytes.
   // Use middle of array to check that memory before it is not modified.
   address buffer  = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong);
   address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong);
   // do an aligned copy
   ((arraycopy_fn)func)(buffer, buffer2, 0);
   for (i = 0; i < sizeof(lbuffer); i++) {
     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
   }
   // adjust destination alignment
   ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
   for (i = 0; i < sizeof(lbuffer); i++) {
     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
   }
   // adjust source alignment
   ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
   for (i = 0; i < sizeof(lbuffer); i++) {
     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
   }
 }
 #endif
 void StubRoutines::initialize2() {
   if (_code2 == NULL) {
     ResourceMark rm;
     TraceTime timer("StubRoutines generation 2", TraceStartupTime);
     _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
     if (_code2 == NULL) {
       vm_exit_out_of_memory(code_size2, OOM_MALLOC_ERROR, "CodeCache: no room for StubRoutines (2)");
     }
     CodeBuffer buffer(_code2);
     StubGenerator_generate(&buffer, true);
   }
 #ifdef ASSERT
 #define TEST_ARRAYCOPY(type)                                                    \
   test_arraycopy_func(          type##_arraycopy(),          sizeof(type));     \
   test_arraycopy_func(          type##_disjoint_arraycopy(), sizeof(type));     \
   test_arraycopy_func(arrayof_##type##_arraycopy(),          sizeof(HeapWord)); \
   test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
   // Make sure all the arraycopy stubs properly handle zero count
   TEST_ARRAYCOPY(jbyte);
   TEST_ARRAYCOPY(jshort);
   TEST_ARRAYCOPY(jint);
   TEST_ARRAYCOPY(jlong);
 #undef TEST_ARRAYCOPY
 #define TEST_FILL(type)                                                                      \
   if (_##type##_fill != NULL) {                                                              \
     union {                                                                                  \
       double d;                                                                              \
       type body[96];                                                                         \
     } s;                                                                                     \
                                                                                              \
     int v = 32;                                                                              \
     for (int offset = -2; offset <= 2; offset++) {                                           \
       for (int i = 0; i < 96; i++) {                                                         \
         s.body[i] = 1;                                                                       \
       }                                                                                      \
       type* start = s.body + 8 + offset;                                                     \
       for (int aligned = 0; aligned < 2; aligned++) {                                        \
         if (aligned) {                                                                       \
           if (((intptr_t)start) % HeapWordSize == 0) {                                       \
             ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
           } else {                                                                           \
             continue;                                                                        \
           }                                                                                  \
         } else {                                                                             \
           ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80);           \
         }                                                                                    \
         for (int i = 0; i < 96; i++) {                                                       \
           if (i < (8 + offset) || i >= (88 + offset)) {                                      \
             assert(s.body[i] == 1, "what?");                                                 \
           } else {                                                                           \
             assert(s.body[i] == 32, "what?");                                                \
           }                                                                                  \
         }                                                                                    \
       }                                                                                      \
     }                                                                                        \
   }                                                                                          \
   TEST_FILL(jbyte);
   TEST_FILL(jshort);
   TEST_FILL(jint);
 #undef TEST_FILL
 #define TEST_COPYRTN(type) \
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic),  sizeof(type)); \
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
   // Make sure all the copy runtime routines properly handle zero count
   TEST_COPYRTN(jbyte);
   TEST_COPYRTN(jshort);
   TEST_COPYRTN(jint);
   TEST_COPYRTN(jlong);
 #undef TEST_COPYRTN
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
   // Aligned to BytesPerLong
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
 #endif
 }
 void stubRoutines_init1() { StubRoutines::initialize1(); }
 void stubRoutines_init2() { StubRoutines::initialize2(); }
 //
 // Default versions of arraycopy functions
 //
 static void gen_arraycopy_barrier_pre(oop* dest, size_t count, bool dest_uninitialized) {
     assert(count != 0, "count should be non-zero");
     assert(count <= (size_t)max_intx, "count too large");
     BarrierSet* bs = Universe::heap()->barrier_set();
     assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt");
     bs->write_ref_array_pre(dest, (int)count, dest_uninitialized);
 }
 static void gen_arraycopy_barrier(oop* dest, size_t count) {
     assert(count != 0, "count should be non-zero");
     BarrierSet* bs = Universe::heap()->barrier_set();
     assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
     bs->write_ref_array((HeapWord*)dest, count);
 }
 JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
 #endif // !PRODUCT
   Copy::conjoint_jbytes_atomic(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
 #endif // !PRODUCT
   Copy::conjoint_jshorts_atomic(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
 #endif // !PRODUCT
   Copy::conjoint_jints_atomic(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jlong_array_copy_ctr++;      // Slow-path long/double array copy
 #endif // !PRODUCT
   Copy::conjoint_jlongs_atomic(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 #endif // !PRODUCT
   assert(count != 0, "count should be non-zero");
   gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/false);
   Copy::conjoint_oops_atomic(src, dest, count);
   gen_arraycopy_barrier(dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::oop_copy_uninit(oop* src, oop* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 #endif // !PRODUCT
   assert(count != 0, "count should be non-zero");
   gen_arraycopy_barrier_pre(dest, count, /*dest_uninitialized*/true);
   Copy::conjoint_oops_atomic(src, dest, count);
   gen_arraycopy_barrier(dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
 #endif // !PRODUCT
   Copy::arrayof_conjoint_jbytes(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
 #endif // !PRODUCT
   Copy::arrayof_conjoint_jshorts(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
 #endif // !PRODUCT
   Copy::arrayof_conjoint_jints(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_jlong_array_copy_ctr++;       // Slow-path int/float array copy
 #endif // !PRODUCT
   Copy::arrayof_conjoint_jlongs(src, dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 #endif // !PRODUCT
   assert(count != 0, "count should be non-zero");
   gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/false);
   Copy::arrayof_conjoint_oops(src, dest, count);
   gen_arraycopy_barrier((oop *) dest, count);
 JRT_END
 JRT_LEAF(void, StubRoutines::arrayof_oop_copy_uninit(HeapWord* src, HeapWord* dest, size_t count))
 #ifndef PRODUCT
   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
 #endif // !PRODUCT
   assert(count != 0, "count should be non-zero");
   gen_arraycopy_barrier_pre((oop *) dest, count, /*dest_uninitialized*/true);
   Copy::arrayof_conjoint_oops(src, dest, count);
   gen_arraycopy_barrier((oop *) dest, count);
 JRT_END
 address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
 #define RETURN_STUB(xxx_fill) { \
   name = #xxx_fill; \
   return StubRoutines::xxx_fill(); }
   switch (t) {
   case T_BYTE:
   case T_BOOLEAN:
     if (!aligned) RETURN_STUB(jbyte_fill);
     RETURN_STUB(arrayof_jbyte_fill);
   case T_CHAR:
   case T_SHORT:
     if (!aligned) RETURN_STUB(jshort_fill);
     RETURN_STUB(arrayof_jshort_fill);
   case T_INT:
   case T_FLOAT:
     if (!aligned) RETURN_STUB(jint_fill);
     RETURN_STUB(arrayof_jint_fill);
   case T_DOUBLE:
   case T_LONG:
   case T_ARRAY:
   case T_OBJECT:
   case T_NARROWOOP:
   case T_NARROWKLASS:
   case T_ADDRESS:
     // Currently unsupported
     return NULL;
   default:
     ShouldNotReachHere();
     return NULL;
   }
 #undef RETURN_STUB
 }
 // constants for computing the copy function
 enum {
   COPYFUNC_UNALIGNED = 0,
   COPYFUNC_ALIGNED = 1,                 // src, dest aligned to HeapWordSize
   COPYFUNC_CONJOINT = 0,
   COPYFUNC_DISJOINT = 2                 // src != dest, or transfer can descend
 };
 // Note:  The condition "disjoint" applies also for overlapping copies
 // where an descending copy is permitted (i.e., dest_offset <= src_offset).
 address
 StubRoutines::select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
   int selector =
     (aligned  ? COPYFUNC_ALIGNED  : COPYFUNC_UNALIGNED) +
     (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
 #define RETURN_STUB(xxx_arraycopy) { \
   name = #xxx_arraycopy; \
   return StubRoutines::xxx_arraycopy(); }
 #define RETURN_STUB_PARM(xxx_arraycopy, parm) {           \
   name = #xxx_arraycopy; \
   return StubRoutines::xxx_arraycopy(parm); }
   switch (t) {
   case T_BYTE:
   case T_BOOLEAN:
     switch (selector) {
     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_arraycopy);
     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_disjoint_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
     }
   case T_CHAR:
   case T_SHORT:
     switch (selector) {
     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_arraycopy);
     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_disjoint_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
     }
   case T_INT:
   case T_FLOAT:
     switch (selector) {
     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_arraycopy);
     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_disjoint_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_disjoint_arraycopy);
     }
   case T_DOUBLE:
   case T_LONG:
     switch (selector) {
     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_arraycopy);
     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_disjoint_arraycopy);
     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
     }
   case T_ARRAY:
   case T_OBJECT:
     switch (selector) {
     case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
     case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
     case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
     case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
     }
   default:
     ShouldNotReachHere();
     return NULL;
   }
 #undef RETURN_STUB
 #undef RETURN_STUB_PARM
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/stubRoutines.cpp@76af788b6c16 (annotated)

src/share/vm/runtime/stubRoutines.cpp