duke@435: /*
trims@1907:  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "asm/codeBuffer.hpp"
stefank@2314: #include "memory/resourceArea.hpp"
stefank@2314: #include "oops/oop.inline.hpp"
stefank@2314: #include "runtime/interfaceSupport.hpp"
stefank@2314: #include "runtime/sharedRuntime.hpp"
stefank@2314: #include "runtime/stubRoutines.hpp"
stefank@2314: #include "runtime/timer.hpp"
stefank@2314: #include "utilities/copy.hpp"
stefank@2314: #ifdef COMPILER2
stefank@2314: #include "opto/runtime.hpp"
stefank@2314: #endif
duke@435: 
duke@435: 
duke@435: // Implementation of StubRoutines - for a description
duke@435: // of how to extend it, see the header file.
duke@435: 
duke@435: // Class Variables
duke@435: 
duke@435: BufferBlob* StubRoutines::_code1                                = NULL;
duke@435: BufferBlob* StubRoutines::_code2                                = NULL;
duke@435: 
duke@435: address StubRoutines::_call_stub_return_address                 = NULL;
duke@435: address StubRoutines::_call_stub_entry                          = NULL;
duke@435: 
duke@435: address StubRoutines::_catch_exception_entry                    = NULL;
duke@435: address StubRoutines::_forward_exception_entry                  = NULL;
duke@435: address StubRoutines::_throw_AbstractMethodError_entry          = NULL;
dcubed@451: address StubRoutines::_throw_IncompatibleClassChangeError_entry = NULL;
duke@435: address StubRoutines::_throw_ArithmeticException_entry          = NULL;
duke@435: address StubRoutines::_throw_NullPointerException_entry         = NULL;
duke@435: address StubRoutines::_throw_NullPointerException_at_call_entry = NULL;
duke@435: address StubRoutines::_throw_StackOverflowError_entry           = NULL;
duke@435: address StubRoutines::_handler_for_unsafe_access_entry          = NULL;
duke@435: jint    StubRoutines::_verify_oop_count                         = 0;
duke@435: address StubRoutines::_verify_oop_subroutine_entry              = NULL;
duke@435: address StubRoutines::_atomic_xchg_entry                        = NULL;
duke@435: address StubRoutines::_atomic_xchg_ptr_entry                    = NULL;
duke@435: address StubRoutines::_atomic_store_entry                       = NULL;
duke@435: address StubRoutines::_atomic_store_ptr_entry                   = NULL;
duke@435: address StubRoutines::_atomic_cmpxchg_entry                     = NULL;
duke@435: address StubRoutines::_atomic_cmpxchg_ptr_entry                 = NULL;
duke@435: address StubRoutines::_atomic_cmpxchg_long_entry                = NULL;
duke@435: address StubRoutines::_atomic_add_entry                         = NULL;
duke@435: address StubRoutines::_atomic_add_ptr_entry                     = NULL;
duke@435: address StubRoutines::_fence_entry                              = NULL;
duke@435: address StubRoutines::_d2i_wrapper                              = NULL;
duke@435: address StubRoutines::_d2l_wrapper                              = NULL;
duke@435: 
duke@435: jint    StubRoutines::_fpu_cntrl_wrd_std                        = 0;
duke@435: jint    StubRoutines::_fpu_cntrl_wrd_24                         = 0;
duke@435: jint    StubRoutines::_fpu_cntrl_wrd_64                         = 0;
duke@435: jint    StubRoutines::_fpu_cntrl_wrd_trunc                      = 0;
duke@435: jint    StubRoutines::_mxcsr_std                                = 0;
duke@435: jint    StubRoutines::_fpu_subnormal_bias1[3]                   = { 0, 0, 0 };
duke@435: jint    StubRoutines::_fpu_subnormal_bias2[3]                   = { 0, 0, 0 };
duke@435: 
duke@435: // Compiled code entry points default values
duke@435: // The dafault functions don't have separate disjoint versions.
duke@435: address StubRoutines::_jbyte_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
duke@435: address StubRoutines::_jshort_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
duke@435: address StubRoutines::_jint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
duke@435: address StubRoutines::_jlong_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
duke@435: address StubRoutines::_oop_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
duke@435: address StubRoutines::_jbyte_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jbyte_copy);
duke@435: address StubRoutines::_jshort_disjoint_arraycopy         = CAST_FROM_FN_PTR(address, StubRoutines::jshort_copy);
duke@435: address StubRoutines::_jint_disjoint_arraycopy           = CAST_FROM_FN_PTR(address, StubRoutines::jint_copy);
duke@435: address StubRoutines::_jlong_disjoint_arraycopy          = CAST_FROM_FN_PTR(address, StubRoutines::jlong_copy);
duke@435: address StubRoutines::_oop_disjoint_arraycopy            = CAST_FROM_FN_PTR(address, StubRoutines::oop_copy);
duke@435: 
duke@435: address StubRoutines::_arrayof_jbyte_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
duke@435: address StubRoutines::_arrayof_jshort_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
duke@435: address StubRoutines::_arrayof_jint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
duke@435: address StubRoutines::_arrayof_jlong_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
duke@435: address StubRoutines::_arrayof_oop_arraycopy    = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
duke@435: address StubRoutines::_arrayof_jbyte_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jbyte_copy);
duke@435: address StubRoutines::_arrayof_jshort_disjoint_arraycopy = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jshort_copy);
duke@435: address StubRoutines::_arrayof_jint_disjoint_arraycopy   = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jint_copy);
duke@435: address StubRoutines::_arrayof_jlong_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_jlong_copy);
duke@435: address StubRoutines::_arrayof_oop_disjoint_arraycopy  = CAST_FROM_FN_PTR(address, StubRoutines::arrayof_oop_copy);
duke@435: 
duke@435: address StubRoutines::_checkcast_arraycopy               = NULL;
duke@435: address StubRoutines::_unsafe_arraycopy                  = NULL;
duke@435: address StubRoutines::_generic_arraycopy                 = NULL;
duke@435: 
never@2118: 
never@2118: address StubRoutines::_jbyte_fill;
never@2118: address StubRoutines::_jshort_fill;
never@2118: address StubRoutines::_jint_fill;
never@2118: address StubRoutines::_arrayof_jbyte_fill;
never@2118: address StubRoutines::_arrayof_jshort_fill;
never@2118: address StubRoutines::_arrayof_jint_fill;
never@2118: 
never@2118: 
never@1609: double (* StubRoutines::_intrinsic_log   )(double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_log10 )(double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_exp   )(double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_pow   )(double, double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_sin   )(double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_cos   )(double) = NULL;
never@1609: double (* StubRoutines::_intrinsic_tan   )(double) = NULL;
never@1609: 
duke@435: // Initialization
duke@435: //
duke@435: // Note: to break cycle with universe initialization, stubs are generated in two phases.
duke@435: // The first one generates stubs needed during universe init (e.g., _handle_must_compile_first_entry).
duke@435: // The second phase includes all other stubs (which may depend on universe being initialized.)
duke@435: 
duke@435: extern void StubGenerator_generate(CodeBuffer* code, bool all); // only interface to generators
duke@435: 
duke@435: void StubRoutines::initialize1() {
duke@435:   if (_code1 == NULL) {
duke@435:     ResourceMark rm;
duke@435:     TraceTime timer("StubRoutines generation 1", TraceStartupTime);
duke@435:     _code1 = BufferBlob::create("StubRoutines (1)", code_size1);
jcoomes@1845:     if (_code1 == NULL) {
twisti@2103:       vm_exit_out_of_memory(code_size1, "CodeCache: no room for StubRoutines (1)");
jcoomes@1845:     }
twisti@2103:     CodeBuffer buffer(_code1);
duke@435:     StubGenerator_generate(&buffer, false);
duke@435:   }
duke@435: }
duke@435: 
duke@435: 
duke@435: #ifdef ASSERT
duke@435: typedef void (*arraycopy_fn)(address src, address dst, int count);
duke@435: 
duke@435: // simple tests of generated arraycopy functions
duke@435: static void test_arraycopy_func(address func, int alignment) {
duke@435:   int v = 0xcc;
duke@435:   int v2 = 0x11;
kvn@1958:   jlong lbuffer[8];
kvn@1958:   jlong lbuffer2[8];
kvn@1958:   address fbuffer  = (address) lbuffer;
kvn@1958:   address fbuffer2 = (address) lbuffer2;
duke@435:   unsigned int i;
duke@435:   for (i = 0; i < sizeof(lbuffer); i++) {
kvn@1958:     fbuffer[i] = v; fbuffer2[i] = v2;
duke@435:   }
kvn@1958:   // C++ does not guarantee jlong[] array alignment to 8 bytes.
kvn@1958:   // Use middle of array to check that memory before it is not modified.
kvn@1958:   address buffer  = (address) round_to((intptr_t)&lbuffer[4], BytesPerLong);
kvn@1958:   address buffer2 = (address) round_to((intptr_t)&lbuffer2[4], BytesPerLong);
duke@435:   // do an aligned copy
duke@435:   ((arraycopy_fn)func)(buffer, buffer2, 0);
duke@435:   for (i = 0; i < sizeof(lbuffer); i++) {
kvn@1958:     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
duke@435:   }
duke@435:   // adjust destination alignment
duke@435:   ((arraycopy_fn)func)(buffer, buffer2 + alignment, 0);
duke@435:   for (i = 0; i < sizeof(lbuffer); i++) {
kvn@1958:     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
duke@435:   }
duke@435:   // adjust source alignment
duke@435:   ((arraycopy_fn)func)(buffer + alignment, buffer2, 0);
duke@435:   for (i = 0; i < sizeof(lbuffer); i++) {
kvn@1958:     assert(fbuffer[i] == v && fbuffer2[i] == v2, "shouldn't have copied anything");
duke@435:   }
duke@435: }
duke@435: #endif
duke@435: 
duke@435: 
duke@435: void StubRoutines::initialize2() {
duke@435:   if (_code2 == NULL) {
duke@435:     ResourceMark rm;
duke@435:     TraceTime timer("StubRoutines generation 2", TraceStartupTime);
duke@435:     _code2 = BufferBlob::create("StubRoutines (2)", code_size2);
jcoomes@1845:     if (_code2 == NULL) {
twisti@2103:       vm_exit_out_of_memory(code_size2, "CodeCache: no room for StubRoutines (2)");
jcoomes@1845:     }
twisti@2103:     CodeBuffer buffer(_code2);
duke@435:     StubGenerator_generate(&buffer, true);
duke@435:   }
duke@435: 
duke@435: #ifdef ASSERT
duke@435: 
duke@435: #define TEST_ARRAYCOPY(type)                                                    \
duke@435:   test_arraycopy_func(          type##_arraycopy(),          sizeof(type));     \
duke@435:   test_arraycopy_func(          type##_disjoint_arraycopy(), sizeof(type));     \
duke@435:   test_arraycopy_func(arrayof_##type##_arraycopy(),          sizeof(HeapWord)); \
duke@435:   test_arraycopy_func(arrayof_##type##_disjoint_arraycopy(), sizeof(HeapWord))
duke@435: 
kvn@1958:   // Make sure all the arraycopy stubs properly handle zero count
duke@435:   TEST_ARRAYCOPY(jbyte);
duke@435:   TEST_ARRAYCOPY(jshort);
duke@435:   TEST_ARRAYCOPY(jint);
duke@435:   TEST_ARRAYCOPY(jlong);
duke@435: 
duke@435: #undef TEST_ARRAYCOPY
duke@435: 
never@2118: #define TEST_FILL(type)                                                                      \
never@2118:   if (_##type##_fill != NULL) {                                                              \
never@2118:     union {                                                                                  \
never@2118:       double d;                                                                              \
never@2118:       type body[96];                                                                         \
never@2118:     } s;                                                                                     \
never@2118:                                                                                              \
never@2118:     int v = 32;                                                                              \
never@2118:     for (int offset = -2; offset <= 2; offset++) {                                           \
never@2118:       for (int i = 0; i < 96; i++) {                                                         \
never@2118:         s.body[i] = 1;                                                                       \
never@2118:       }                                                                                      \
never@2118:       type* start = s.body + 8 + offset;                                                     \
never@2118:       for (int aligned = 0; aligned < 2; aligned++) {                                        \
never@2118:         if (aligned) {                                                                       \
never@2118:           if (((intptr_t)start) % HeapWordSize == 0) {                                       \
never@2118:             ((void (*)(type*, int, int))StubRoutines::_arrayof_##type##_fill)(start, v, 80); \
never@2118:           } else {                                                                           \
never@2118:             continue;                                                                        \
never@2118:           }                                                                                  \
never@2118:         } else {                                                                             \
never@2118:           ((void (*)(type*, int, int))StubRoutines::_##type##_fill)(start, v, 80);           \
never@2118:         }                                                                                    \
never@2118:         for (int i = 0; i < 96; i++) {                                                       \
never@2118:           if (i < (8 + offset) || i >= (88 + offset)) {                                      \
never@2118:             assert(s.body[i] == 1, "what?");                                                 \
never@2118:           } else {                                                                           \
never@2118:             assert(s.body[i] == 32, "what?");                                                \
never@2118:           }                                                                                  \
never@2118:         }                                                                                    \
never@2118:       }                                                                                      \
never@2118:     }                                                                                        \
never@2118:   }                                                                                          \
never@2118: 
never@2118:   TEST_FILL(jbyte);
never@2118:   TEST_FILL(jshort);
never@2118:   TEST_FILL(jint);
never@2118: 
never@2118: #undef TEST_FILL
never@2118: 
kvn@1958: #define TEST_COPYRTN(type) \
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_##type##s_atomic),  sizeof(type)); \
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::arrayof_conjoint_##type##s), (int)MAX2(sizeof(HeapWord), sizeof(type)))
kvn@1958: 
kvn@1958:   // Make sure all the copy runtime routines properly handle zero count
kvn@1958:   TEST_COPYRTN(jbyte);
kvn@1958:   TEST_COPYRTN(jshort);
kvn@1958:   TEST_COPYRTN(jint);
kvn@1958:   TEST_COPYRTN(jlong);
kvn@1958: 
kvn@1958: #undef TEST_COPYRTN
kvn@1958: 
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::conjoint_words), sizeof(HeapWord));
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words), sizeof(HeapWord));
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::disjoint_words_atomic), sizeof(HeapWord));
kvn@1958:   // Aligned to BytesPerLong
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_conjoint_words), sizeof(jlong));
kvn@1958:   test_arraycopy_func(CAST_FROM_FN_PTR(address, Copy::aligned_disjoint_words), sizeof(jlong));
kvn@1958: 
duke@435: #endif
duke@435: }
duke@435: 
duke@435: 
duke@435: void stubRoutines_init1() { StubRoutines::initialize1(); }
duke@435: void stubRoutines_init2() { StubRoutines::initialize2(); }
duke@435: 
duke@435: //
duke@435: // Default versions of arraycopy functions
duke@435: //
duke@435: 
ysr@1680: static void gen_arraycopy_barrier_pre(oop* dest, size_t count) {
ysr@1680:     assert(count != 0, "count should be non-zero");
ysr@1680:     assert(count <= (size_t)max_intx, "count too large");
ysr@1680:     BarrierSet* bs = Universe::heap()->barrier_set();
ysr@1680:     assert(bs->has_write_ref_array_pre_opt(), "Must have pre-barrier opt");
ysr@1680:     bs->write_ref_array_pre(dest, (int)count);
ysr@1680: }
ysr@1680: 
duke@435: static void gen_arraycopy_barrier(oop* dest, size_t count) {
duke@435:     assert(count != 0, "count should be non-zero");
duke@435:     BarrierSet* bs = Universe::heap()->barrier_set();
duke@435:     assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt");
ysr@1680:     bs->write_ref_array((HeapWord*)dest, count);
duke@435: }
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::jbyte_copy(jbyte* src, jbyte* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
duke@435: #endif // !PRODUCT
kvn@1958:   Copy::conjoint_jbytes_atomic(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::jshort_copy(jshort* src, jshort* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::conjoint_jshorts_atomic(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::jint_copy(jint* src, jint* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::conjoint_jints_atomic(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::jlong_copy(jlong* src, jlong* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jlong_array_copy_ctr++;      // Slow-path long/double array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::conjoint_jlongs_atomic(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::oop_copy(oop* src, oop* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
duke@435: #endif // !PRODUCT
duke@435:   assert(count != 0, "count should be non-zero");
ysr@1680:   gen_arraycopy_barrier_pre(dest, count);
duke@435:   Copy::conjoint_oops_atomic(src, dest, count);
duke@435:   gen_arraycopy_barrier(dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::arrayof_jbyte_copy(HeapWord* src, HeapWord* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jbyte_array_copy_ctr++;      // Slow-path byte array copy
duke@435: #endif // !PRODUCT
kvn@1958:   Copy::arrayof_conjoint_jbytes(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::arrayof_jshort_copy(HeapWord* src, HeapWord* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jshort_array_copy_ctr++;     // Slow-path short/char array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::arrayof_conjoint_jshorts(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::arrayof_jint_copy(HeapWord* src, HeapWord* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jint_array_copy_ctr++;       // Slow-path int/float array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::arrayof_conjoint_jints(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::arrayof_jlong_copy(HeapWord* src, HeapWord* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_jlong_array_copy_ctr++;       // Slow-path int/float array copy
duke@435: #endif // !PRODUCT
duke@435:   Copy::arrayof_conjoint_jlongs(src, dest, count);
duke@435: JRT_END
duke@435: 
duke@435: JRT_LEAF(void, StubRoutines::arrayof_oop_copy(HeapWord* src, HeapWord* dest, size_t count))
duke@435: #ifndef PRODUCT
duke@435:   SharedRuntime::_oop_array_copy_ctr++;        // Slow-path oop array copy
duke@435: #endif // !PRODUCT
duke@435:   assert(count != 0, "count should be non-zero");
ysr@1680:   gen_arraycopy_barrier_pre((oop *) dest, count);
duke@435:   Copy::arrayof_conjoint_oops(src, dest, count);
duke@435:   gen_arraycopy_barrier((oop *) dest, count);
duke@435: JRT_END
never@2118: 
never@2118: 
never@2118: address StubRoutines::select_fill_function(BasicType t, bool aligned, const char* &name) {
never@2118: #define RETURN_STUB(xxx_fill) { \
never@2118:   name = #xxx_fill; \
never@2118:   return StubRoutines::xxx_fill(); }
never@2118: 
never@2118:   switch (t) {
never@2118:   case T_BYTE:
never@2118:   case T_BOOLEAN:
never@2118:     if (!aligned) RETURN_STUB(jbyte_fill);
never@2118:     RETURN_STUB(arrayof_jbyte_fill);
never@2118:   case T_CHAR:
never@2118:   case T_SHORT:
never@2118:     if (!aligned) RETURN_STUB(jshort_fill);
never@2118:     RETURN_STUB(arrayof_jshort_fill);
never@2118:   case T_INT:
never@2118:   case T_FLOAT:
never@2118:     if (!aligned) RETURN_STUB(jint_fill);
never@2118:     RETURN_STUB(arrayof_jint_fill);
never@2118:   case T_DOUBLE:
never@2118:   case T_LONG:
never@2118:   case T_ARRAY:
never@2118:   case T_OBJECT:
never@2118:   case T_NARROWOOP:
never@2118:   case T_ADDRESS:
never@2118:     // Currently unsupported
never@2118:     return NULL;
never@2118: 
never@2118:   default:
never@2118:     ShouldNotReachHere();
never@2118:     return NULL;
never@2118:   }
never@2118: 
never@2118: #undef RETURN_STUB
never@2118: }