Mercurial > hg > graal-jvmci-8
comparison src/cpu/ppc/vm/bytes_ppc.hpp @ 14408:ec28f9c041ff
8019972: PPC64 (part 9): platform files for interpreter only VM.
Summary: With this change the HotSpot core build works on Linux/PPC64. The VM succesfully executes simple test programs.
Reviewed-by: kvn
author | goetz |
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date | Fri, 02 Aug 2013 16:46:45 +0200 |
parents | |
children | 67fa91961822 |
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14407:94c202aa2646 | 14408:ec28f9c041ff |
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1 /* | |
2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. | |
3 * Copyright 2012, 2013 SAP AG. All rights reserved. | |
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 * | |
6 * This code is free software; you can redistribute it and/or modify it | |
7 * under the terms of the GNU General Public License version 2 only, as | |
8 * published by the Free Software Foundation. | |
9 * | |
10 * This code is distributed in the hope that it will be useful, but WITHOUT | |
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 * version 2 for more details (a copy is included in the LICENSE file that | |
14 * accompanied this code). | |
15 * | |
16 * You should have received a copy of the GNU General Public License version | |
17 * 2 along with this work; if not, write to the Free Software Foundation, | |
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 * | |
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
21 * or visit www.oracle.com if you need additional information or have any | |
22 * questions. | |
23 * | |
24 */ | |
25 | |
26 #ifndef CPU_PPC_VM_BYTES_PPC_HPP | |
27 #define CPU_PPC_VM_BYTES_PPC_HPP | |
28 | |
29 #include "memory/allocation.hpp" | |
30 | |
31 class Bytes: AllStatic { | |
32 public: | |
33 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering | |
34 // PowerPC needs to check for alignment. | |
35 | |
36 // can I count on address always being a pointer to an unsigned char? Yes | |
37 | |
38 // Returns true, if the byte ordering used by Java is different from the nativ byte ordering | |
39 // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc. | |
40 static inline bool is_Java_byte_ordering_different() { return false; } | |
41 | |
42 // Thus, a swap between native and Java ordering is always a no-op: | |
43 static inline u2 swap_u2(u2 x) { return x; } | |
44 static inline u4 swap_u4(u4 x) { return x; } | |
45 static inline u8 swap_u8(u8 x) { return x; } | |
46 | |
47 static inline u2 get_native_u2(address p) { | |
48 return (intptr_t(p) & 1) == 0 | |
49 ? *(u2*)p | |
50 : ( u2(p[0]) << 8 ) | |
51 | ( u2(p[1]) ); | |
52 } | |
53 | |
54 static inline u4 get_native_u4(address p) { | |
55 switch (intptr_t(p) & 3) { | |
56 case 0: return *(u4*)p; | |
57 | |
58 case 2: return ( u4( ((u2*)p)[0] ) << 16 ) | |
59 | ( u4( ((u2*)p)[1] ) ); | |
60 | |
61 default: return ( u4(p[0]) << 24 ) | |
62 | ( u4(p[1]) << 16 ) | |
63 | ( u4(p[2]) << 8 ) | |
64 | u4(p[3]); | |
65 } | |
66 } | |
67 | |
68 static inline u8 get_native_u8(address p) { | |
69 switch (intptr_t(p) & 7) { | |
70 case 0: return *(u8*)p; | |
71 | |
72 case 4: return ( u8( ((u4*)p)[0] ) << 32 ) | |
73 | ( u8( ((u4*)p)[1] ) ); | |
74 | |
75 case 2: return ( u8( ((u2*)p)[0] ) << 48 ) | |
76 | ( u8( ((u2*)p)[1] ) << 32 ) | |
77 | ( u8( ((u2*)p)[2] ) << 16 ) | |
78 | ( u8( ((u2*)p)[3] ) ); | |
79 | |
80 default: return ( u8(p[0]) << 56 ) | |
81 | ( u8(p[1]) << 48 ) | |
82 | ( u8(p[2]) << 40 ) | |
83 | ( u8(p[3]) << 32 ) | |
84 | ( u8(p[4]) << 24 ) | |
85 | ( u8(p[5]) << 16 ) | |
86 | ( u8(p[6]) << 8 ) | |
87 | u8(p[7]); | |
88 } | |
89 } | |
90 | |
91 | |
92 | |
93 static inline void put_native_u2(address p, u2 x) { | |
94 if ( (intptr_t(p) & 1) == 0 ) { *(u2*)p = x; } | |
95 else { | |
96 p[0] = x >> 8; | |
97 p[1] = x; | |
98 } | |
99 } | |
100 | |
101 static inline void put_native_u4(address p, u4 x) { | |
102 switch ( intptr_t(p) & 3 ) { | |
103 case 0: *(u4*)p = x; | |
104 break; | |
105 | |
106 case 2: ((u2*)p)[0] = x >> 16; | |
107 ((u2*)p)[1] = x; | |
108 break; | |
109 | |
110 default: ((u1*)p)[0] = x >> 24; | |
111 ((u1*)p)[1] = x >> 16; | |
112 ((u1*)p)[2] = x >> 8; | |
113 ((u1*)p)[3] = x; | |
114 break; | |
115 } | |
116 } | |
117 | |
118 static inline void put_native_u8(address p, u8 x) { | |
119 switch ( intptr_t(p) & 7 ) { | |
120 case 0: *(u8*)p = x; | |
121 break; | |
122 | |
123 case 4: ((u4*)p)[0] = x >> 32; | |
124 ((u4*)p)[1] = x; | |
125 break; | |
126 | |
127 case 2: ((u2*)p)[0] = x >> 48; | |
128 ((u2*)p)[1] = x >> 32; | |
129 ((u2*)p)[2] = x >> 16; | |
130 ((u2*)p)[3] = x; | |
131 break; | |
132 | |
133 default: ((u1*)p)[0] = x >> 56; | |
134 ((u1*)p)[1] = x >> 48; | |
135 ((u1*)p)[2] = x >> 40; | |
136 ((u1*)p)[3] = x >> 32; | |
137 ((u1*)p)[4] = x >> 24; | |
138 ((u1*)p)[5] = x >> 16; | |
139 ((u1*)p)[6] = x >> 8; | |
140 ((u1*)p)[7] = x; | |
141 } | |
142 } | |
143 | |
144 | |
145 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering) | |
146 // (no byte-order reversal is needed since Power CPUs are big-endian oriented). | |
147 static inline u2 get_Java_u2(address p) { return get_native_u2(p); } | |
148 static inline u4 get_Java_u4(address p) { return get_native_u4(p); } | |
149 static inline u8 get_Java_u8(address p) { return get_native_u8(p); } | |
150 | |
151 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); } | |
152 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); } | |
153 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); } | |
154 }; | |
155 | |
156 #endif // CPU_PPC_VM_BYTES_PPC_HPP |