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comparison src/cpu/x86/vm/templateInterpreter_x86_32.cpp @ 8873:e961c11b85fe

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8011102: Clear AVX registers after return from JNI call Summary: Execute vzeroupper instruction after JNI call and on exits in jit compiled code which use 256bit vectors. Reviewed-by: roland
author kvn
date Wed, 03 Apr 2013 11:12:57 -0700
parents 0094485b46c7
children aeaca88565e6
comparison
equal deleted inserted replaced
8872:53028d751155 8873:e961c11b85fe
1078 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native); 1078 __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_native);
1079 __ call(rax); 1079 __ call(rax);
1080 1080
1081 // result potentially in rdx:rax or ST0 1081 // result potentially in rdx:rax or ST0
1082 1082
1083 // Either restore the MXCSR register after returning from the JNI Call 1083 // Verify or restore cpu control state after JNI call
1084 // or verify that it wasn't changed. 1084 __ restore_cpu_control_state_after_jni();
1085 if (VM_Version::supports_sse()) {
1086 if (RestoreMXCSROnJNICalls) {
1087 __ ldmxcsr(ExternalAddress(StubRoutines::addr_mxcsr_std()));
1088 }
1089 else if (CheckJNICalls ) {
1090 __ call(RuntimeAddress(StubRoutines::x86::verify_mxcsr_entry()));
1091 }
1092 }
1093
1094 // Either restore the x87 floating pointer control word after returning
1095 // from the JNI call or verify that it wasn't changed.
1096 if (CheckJNICalls) {
1097 __ call(RuntimeAddress(StubRoutines::x86::verify_fpu_cntrl_wrd_entry()));
1098 }
1099 1085
1100 // save potential result in ST(0) & rdx:rax 1086 // save potential result in ST(0) & rdx:rax
1101 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 - 1087 // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
1102 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers) 1088 // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
1103 // It is safe to do this push because state is _thread_in_native and return address will be found 1089 // It is safe to do this push because state is _thread_in_native and return address will be found