1 /*
2 * Copyright (c) 2003, 2015, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "asm/macroAssembler.hpp"
27 #include "interpreter/interp_masm.hpp"
28 #include "interpreter/interpreter.hpp"
29 #include "interpreter/templateInterpreterGenerator.hpp"
30 #include "runtime/arguments.hpp"
31
32 #define __ _masm->
33
34 /**
35 * Method entry for static native methods:
36 * int java.util.zip.CRC32.update(int crc, int b)
37 */
38 address TemplateInterpreterGenerator::generate_CRC32_update_entry() {
39 if (UseCRC32Intrinsics) {
40 address entry = __ pc();
41
42 // rbx,: Method*
43 // r13: senderSP must preserved for slow path, set SP to it on fast path
44 // c_rarg0: scratch (rdi on non-Win64, rcx on Win64)
45 // c_rarg1: scratch (rsi on non-Win64, rdx on Win64)
46
47 Label slow_path;
48 // If we need a safepoint check, generate full interpreter entry.
49 ExternalAddress state(SafepointSynchronize::address_of_state());
50 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
51 SafepointSynchronize::_not_synchronized);
52 __ jcc(Assembler::notEqual, slow_path);
53
54 // We don't generate local frame and don't align stack because
55 // we call stub code and there is no safepoint on this path.
56
57 // Load parameters
58 const Register crc = rax; // crc
59 const Register val = c_rarg0; // source java byte value
60 const Register tbl = c_rarg1; // scratch
61
62 // Arguments are reversed on java expression stack
63 __ movl(val, Address(rsp, wordSize)); // byte value
64 __ movl(crc, Address(rsp, 2*wordSize)); // Initial CRC
65
66 __ lea(tbl, ExternalAddress(StubRoutines::crc_table_addr()));
67 __ notl(crc); // ~crc
68 __ update_byte_crc32(crc, val, tbl);
69 __ notl(crc); // ~crc
70 // result in rax
71
72 // _areturn
73 __ pop(rdi); // get return address
74 __ mov(rsp, r13); // set sp to sender sp
75 __ jmp(rdi);
76
77 // generate a vanilla native entry as the slow path
78 __ bind(slow_path);
79 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
80 return entry;
81 }
82 return NULL;
83 }
84
85 /**
86 * Method entry for static native methods:
87 * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
88 * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
89 */
90 address TemplateInterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
91 if (UseCRC32Intrinsics) {
92 address entry = __ pc();
93
94 // rbx,: Method*
95 // r13: senderSP must preserved for slow path, set SP to it on fast path
96
97 Label slow_path;
98 // If we need a safepoint check, generate full interpreter entry.
99 ExternalAddress state(SafepointSynchronize::address_of_state());
100 __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
101 SafepointSynchronize::_not_synchronized);
102 __ jcc(Assembler::notEqual, slow_path);
103
104 // We don't generate local frame and don't align stack because
105 // we call stub code and there is no safepoint on this path.
106
107 // Load parameters
108 const Register crc = c_rarg0; // crc
109 const Register buf = c_rarg1; // source java byte array address
110 const Register len = c_rarg2; // length
111 const Register off = len; // offset (never overlaps with 'len')
112
113 // Arguments are reversed on java expression stack
114 // Calculate address of start element
115 if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
116 __ movptr(buf, Address(rsp, 3*wordSize)); // long buf
117 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
118 __ addq(buf, off); // + offset
119 __ movl(crc, Address(rsp, 5*wordSize)); // Initial CRC
120 } else {
121 __ movptr(buf, Address(rsp, 3*wordSize)); // byte[] array
122 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
123 __ movl2ptr(off, Address(rsp, 2*wordSize)); // offset
124 __ addq(buf, off); // + offset
125 __ movl(crc, Address(rsp, 4*wordSize)); // Initial CRC
126 }
127 // Can now load 'len' since we're finished with 'off'
128 __ movl(len, Address(rsp, wordSize)); // Length
129
130 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()), crc, buf, len);
131 // result in rax
132
133 // _areturn
134 __ pop(rdi); // get return address
135 __ mov(rsp, r13); // set sp to sender sp
136 __ jmp(rdi);
137
138 // generate a vanilla native entry as the slow path
139 __ bind(slow_path);
140 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
141 return entry;
142 }
143 return NULL;
144 }
145
146 /**
147 * Method entry for static native methods:
148 * int java.util.zip.CRC32C.updateBytes(int crc, byte[] b, int off, int end)
149 * int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
150 */
151 address TemplateInterpreterGenerator::generate_CRC32C_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
152 if (UseCRC32CIntrinsics) {
153 address entry = __ pc();
154 // Load parameters
155 const Register crc = c_rarg0; // crc
156 const Register buf = c_rarg1; // source java byte array address
157 const Register len = c_rarg2;
158 const Register off = c_rarg3; // offset
159 const Register end = len;
160
161 // Arguments are reversed on java expression stack
162 // Calculate address of start element
163 if (kind == Interpreter::java_util_zip_CRC32C_updateDirectByteBuffer) {
164 __ movptr(buf, Address(rsp, 3 * wordSize)); // long buf
165 __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset
166 __ addq(buf, off); // + offset
167 __ movl(crc, Address(rsp, 5 * wordSize)); // Initial CRC
168 // Note on 5 * wordSize vs. 4 * wordSize:
169 // * int java.util.zip.CRC32C.updateByteBuffer(int crc, long address, int off, int end)
170 // 4 2,3 1 0
171 // end starts at SP + 8
172 // The Java(R) Virtual Machine Specification Java SE 7 Edition
173 // 4.10.2.3. Values of Types long and double
174 // "When calculating operand stack length, values of type long and double have length two."
175 } else {
176 __ movptr(buf, Address(rsp, 3 * wordSize)); // byte[] array
177 __ addptr(buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
178 __ movl2ptr(off, Address(rsp, 2 * wordSize)); // offset
179 __ addq(buf, off); // + offset
180 __ movl(crc, Address(rsp, 4 * wordSize)); // Initial CRC
181 }
182 __ movl(end, Address(rsp, wordSize)); // end
183 __ subl(end, off); // end - off
184 __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32C()), crc, buf, len);
185 // result in rax
186 // _areturn
187 __ pop(rdi); // get return address
188 __ mov(rsp, r13); // set sp to sender sp
189 __ jmp(rdi);
190
191 return entry;
192 }
193
194 return NULL;
195 }