85 inline T JfrBigEndian::read_unaligned(const address location) {
86 assert(location != NULL, "just checking");
87 switch (sizeof(T)) {
88 case sizeof(u1) :
89 return read_bytes<u1>(location);
90 case sizeof(u2):
91 return read_bytes<u2>(location);
92 case sizeof(u4):
93 return read_bytes<u4>(location);
94 case sizeof(u8):
95 return read_bytes<u8>(location);
96 default:
97 assert(false, "not reach");
98 }
99 return 0;
100 }
101
102 inline bool JfrBigEndian::platform_supports_unaligned_reads(void) {
103 #if defined(IA32) || defined(AMD64) || defined(PPC) || defined(S390)
104 return true;
105 #elif defined(SPARC) || defined(ARM) || defined(AARCH64)
106 return false;
107 #else
108 #warning "Unconfigured platform"
109 return false;
110 #endif
111 }
112
113 template<typename T>
114 inline T JfrBigEndian::read(const void* location) {
115 assert(location != NULL, "just checking");
116 assert(sizeof(T) <= sizeof(u8), "no support for arbitrary sizes");
117 if (sizeof(T) == sizeof(u1)) {
118 return *(T*)location;
119 }
120 if (is_aligned(location, sizeof(T)) || platform_supports_unaligned_reads()) {
121 // fastest case
122 switch (sizeof(T)) {
123 case sizeof(u1):
124 return *(T*)location;
125 case sizeof(u2):
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85 inline T JfrBigEndian::read_unaligned(const address location) {
86 assert(location != NULL, "just checking");
87 switch (sizeof(T)) {
88 case sizeof(u1) :
89 return read_bytes<u1>(location);
90 case sizeof(u2):
91 return read_bytes<u2>(location);
92 case sizeof(u4):
93 return read_bytes<u4>(location);
94 case sizeof(u8):
95 return read_bytes<u8>(location);
96 default:
97 assert(false, "not reach");
98 }
99 return 0;
100 }
101
102 inline bool JfrBigEndian::platform_supports_unaligned_reads(void) {
103 #if defined(IA32) || defined(AMD64) || defined(PPC) || defined(S390)
104 return true;
105 #elif defined(ARM) || defined(AARCH64)
106 return false;
107 #else
108 #warning "Unconfigured platform"
109 return false;
110 #endif
111 }
112
113 template<typename T>
114 inline T JfrBigEndian::read(const void* location) {
115 assert(location != NULL, "just checking");
116 assert(sizeof(T) <= sizeof(u8), "no support for arbitrary sizes");
117 if (sizeof(T) == sizeof(u1)) {
118 return *(T*)location;
119 }
120 if (is_aligned(location, sizeof(T)) || platform_supports_unaligned_reads()) {
121 // fastest case
122 switch (sizeof(T)) {
123 case sizeof(u1):
124 return *(T*)location;
125 case sizeof(u2):
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