Thu, 03 Jan 2013 16:30:47 -0800
8005544: Use 256bit YMM registers in arraycopy stubs on x86
Summary: Use YMM registers in arraycopy and array_fill stubs.
Reviewed-by: roland, twisti
1 /*
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25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "asm/macroAssembler.inline.hpp"
28 #include "code/icBuffer.hpp"
29 #include "gc_interface/collectedHeap.inline.hpp"
30 #include "interpreter/bytecodes.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "nativeInst_x86.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "oops/oop.inline2.hpp"
36 int InlineCacheBuffer::ic_stub_code_size() {
37 return NativeMovConstReg::instruction_size +
38 NativeJump::instruction_size +
39 1;
40 // so that code_end can be set in CodeBuffer
41 // 64bit 16 = 5 + 10 bytes + 1 byte
42 // 32bit 11 = 10 bytes + 1 byte
43 }
47 void InlineCacheBuffer::assemble_ic_buffer_code(address code_begin, void* cached_value, address entry_point) {
48 ResourceMark rm;
49 CodeBuffer code(code_begin, ic_stub_code_size());
50 MacroAssembler* masm = new MacroAssembler(&code);
51 // note: even though the code contains an embedded value, we do not need reloc info
52 // because
53 // (1) the value is old (i.e., doesn't matter for scavenges)
54 // (2) these ICStubs are removed *before* a GC happens, so the roots disappear
55 // assert(cached_value == NULL || cached_oop->is_perm(), "must be perm oop");
56 masm->lea(rax, AddressLiteral((address) cached_value, relocInfo::metadata_type));
57 masm->jump(ExternalAddress(entry_point));
58 }
61 address InlineCacheBuffer::ic_buffer_entry_point(address code_begin) {
62 NativeMovConstReg* move = nativeMovConstReg_at(code_begin); // creation also verifies the object
63 NativeJump* jump = nativeJump_at(move->next_instruction_address());
64 return jump->jump_destination();
65 }
68 void* InlineCacheBuffer::ic_buffer_cached_value(address code_begin) {
69 // creation also verifies the object
70 NativeMovConstReg* move = nativeMovConstReg_at(code_begin);
71 // Verifies the jump
72 NativeJump* jump = nativeJump_at(move->next_instruction_address());
73 void* o = (void*)move->data();
74 return o;
75 }