Mercurial > hg > truffle
annotate src/os_cpu/windows_x86/vm/assembler_windows_x86_64.cpp @ 219:ab65a4c9b2e8
6708714: Optimize long LShift on 32-bits x86
Summary: For small (1-3 bits) left long shifts in 32-bits VM use sets of add+addc instructions instead of shld+shl on new AMD cpus.
Reviewed-by: never
Contributed-by: shrinivas.joshi@amd.com
author | kvn |
---|---|
date | Mon, 23 Jun 2008 14:11:12 -0700 |
parents | 7793bd37a336 |
children | d1605aabd0a1 |
rev | line source |
---|---|
0 | 1 /* |
2 * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. | |
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_assembler_windows_x86_64.cpp.incl" | |
27 | |
28 | |
29 void MacroAssembler::int3() { | |
30 emit_byte(0xCC); | |
31 } | |
32 | |
33 // call (Thread*)TlsGetValue(thread_index()); | |
34 void MacroAssembler::get_thread(Register thread) { | |
35 if (thread != rax) { | |
36 pushq(rax); | |
37 } | |
38 pushq(rdi); | |
39 pushq(rsi); | |
40 pushq(rdx); | |
41 pushq(rcx); | |
42 pushq(r8); | |
43 pushq(r9); | |
44 pushq(r10); | |
45 // XXX | |
46 movq(r10, rsp); | |
47 andq(rsp, -16); | |
48 pushq(r10); | |
49 pushq(r11); | |
50 | |
51 movl(c_rarg0, ThreadLocalStorage::thread_index()); | |
52 call(RuntimeAddress((address)TlsGetValue)); | |
53 | |
54 popq(r11); | |
55 popq(rsp); | |
56 popq(r10); | |
57 popq(r9); | |
58 popq(r8); | |
59 popq(rcx); | |
60 popq(rdx); | |
61 popq(rsi); | |
62 popq(rdi); | |
63 if (thread != rax) { | |
64 movq(thread, rax); | |
65 popq(rax); | |
66 } | |
67 } | |
68 | |
168
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
69 bool MacroAssembler::needs_explicit_null_check(intptr_t offset) { |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
70 // Exception handler checks the nmethod's implicit null checks table |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
71 // only when this method returns false. |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
72 if (UseCompressedOops) { |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
73 // The first page after heap_base is unmapped and |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
74 // the 'offset' is equal to [heap_base + offset] for |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
75 // narrow oop implicit null checks. |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
76 uintptr_t heap_base = (uintptr_t)Universe::heap_base(); |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
77 if ((uintptr_t)offset >= heap_base) { |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
78 // Normalize offset for the next check. |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
79 offset = (intptr_t)(pointer_delta((void*)offset, (void*)heap_base, 1)); |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
80 } |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
81 } |
7793bd37a336
6705887: Compressed Oops: generate x64 addressing and implicit null checks with narrow oops
kvn
parents:
0
diff
changeset
|
82 return offset < 0 || os::vm_page_size() <= offset; |
0 | 83 } |