Mon, 04 Nov 2013 21:59:54 +0100
8027445: SIGSEGV at TestFloatingDecimal.testAppendToDouble()I
Summary: String.equals() intrinsic shouldn't use integer length input in pointer arithmetic without an i2l.
Reviewed-by: kvn, twisti
1 /*
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25 #ifndef CPU_SPARC_VM_BYTES_SPARC_HPP
26 #define CPU_SPARC_VM_BYTES_SPARC_HPP
28 #include "memory/allocation.hpp"
30 class Bytes: AllStatic {
31 public:
32 // Efficient reading and writing of unaligned unsigned data in platform-specific byte ordering
33 // Sparc needs to check for alignment.
35 // can I count on address always being a pointer to an unsigned char? Yes
37 // Returns true, if the byte ordering used by Java is different from the nativ byte ordering
38 // of the underlying machine. For example, true for Intel x86, False, for Solaris on Sparc.
39 static inline bool is_Java_byte_ordering_different() { return false; }
41 // Thus, a swap between native and Java ordering is always a no-op:
42 static inline u2 swap_u2(u2 x) { return x; }
43 static inline u4 swap_u4(u4 x) { return x; }
44 static inline u8 swap_u8(u8 x) { return x; }
46 static inline u2 get_native_u2(address p){
47 return (intptr_t(p) & 1) == 0
48 ? *(u2*)p
49 : ( u2(p[0]) << 8 )
50 | ( u2(p[1]) );
51 }
53 static inline u4 get_native_u4(address p) {
54 switch (intptr_t(p) & 3) {
55 case 0: return *(u4*)p;
57 case 2: return ( u4( ((u2*)p)[0] ) << 16 )
58 | ( u4( ((u2*)p)[1] ) );
60 default: return ( u4(p[0]) << 24 )
61 | ( u4(p[1]) << 16 )
62 | ( u4(p[2]) << 8 )
63 | u4(p[3]);
64 }
65 }
67 static inline u8 get_native_u8(address p) {
68 switch (intptr_t(p) & 7) {
69 case 0: return *(u8*)p;
71 case 4: return ( u8( ((u4*)p)[0] ) << 32 )
72 | ( u8( ((u4*)p)[1] ) );
74 case 2: return ( u8( ((u2*)p)[0] ) << 48 )
75 | ( u8( ((u2*)p)[1] ) << 32 )
76 | ( u8( ((u2*)p)[2] ) << 16 )
77 | ( u8( ((u2*)p)[3] ) );
79 default: return ( u8(p[0]) << 56 )
80 | ( u8(p[1]) << 48 )
81 | ( u8(p[2]) << 40 )
82 | ( u8(p[3]) << 32 )
83 | ( u8(p[4]) << 24 )
84 | ( u8(p[5]) << 16 )
85 | ( u8(p[6]) << 8 )
86 | u8(p[7]);
87 }
88 }
92 static inline void put_native_u2(address p, u2 x) {
93 if ( (intptr_t(p) & 1) == 0 ) *(u2*)p = x;
94 else {
95 p[0] = x >> 8;
96 p[1] = x;
97 }
98 }
100 static inline void put_native_u4(address p, u4 x) {
101 switch ( intptr_t(p) & 3 ) {
102 case 0: *(u4*)p = x;
103 break;
105 case 2: ((u2*)p)[0] = x >> 16;
106 ((u2*)p)[1] = x;
107 break;
109 default: ((u1*)p)[0] = x >> 24;
110 ((u1*)p)[1] = x >> 16;
111 ((u1*)p)[2] = x >> 8;
112 ((u1*)p)[3] = x;
113 break;
114 }
115 }
117 static inline void put_native_u8(address p, u8 x) {
118 switch ( intptr_t(p) & 7 ) {
119 case 0: *(u8*)p = x;
120 break;
122 case 4: ((u4*)p)[0] = x >> 32;
123 ((u4*)p)[1] = x;
124 break;
126 case 2: ((u2*)p)[0] = x >> 48;
127 ((u2*)p)[1] = x >> 32;
128 ((u2*)p)[2] = x >> 16;
129 ((u2*)p)[3] = x;
130 break;
132 default: ((u1*)p)[0] = x >> 56;
133 ((u1*)p)[1] = x >> 48;
134 ((u1*)p)[2] = x >> 40;
135 ((u1*)p)[3] = x >> 32;
136 ((u1*)p)[4] = x >> 24;
137 ((u1*)p)[5] = x >> 16;
138 ((u1*)p)[6] = x >> 8;
139 ((u1*)p)[7] = x;
140 }
141 }
144 // Efficient reading and writing of unaligned unsigned data in Java byte ordering (i.e. big-endian ordering)
145 // (no byte-order reversal is needed since SPARC CPUs are big-endian oriented)
146 static inline u2 get_Java_u2(address p) { return get_native_u2(p); }
147 static inline u4 get_Java_u4(address p) { return get_native_u4(p); }
148 static inline u8 get_Java_u8(address p) { return get_native_u8(p); }
150 static inline void put_Java_u2(address p, u2 x) { put_native_u2(p, x); }
151 static inline void put_Java_u4(address p, u4 x) { put_native_u4(p, x); }
152 static inline void put_Java_u8(address p, u8 x) { put_native_u8(p, x); }
153 };
155 //Reconciliation History
156 // 1.7 98/02/24 10:18:41 bytes_i486.hpp
157 // 1.10 98/04/08 18:47:57 bytes_i486.hpp
158 // 1.13 98/07/15 17:10:03 bytes_i486.hpp
159 // 1.14 98/08/13 10:38:23 bytes_i486.hpp
160 // 1.15 98/10/05 16:30:21 bytes_i486.hpp
161 // 1.17 99/06/22 16:37:35 bytes_i486.hpp
162 //End
164 #endif // CPU_SPARC_VM_BYTES_SPARC_HPP