3643 // provoke OS NULL exception if reg = NULL by
3644 // accessing M[reg] w/o changing any (non-CC) registers
3645 // NOTE: cmpl is plenty here to provoke a segv
3646 cmpptr(rax, Address(reg, 0));
3647 // Note: should probably use testl(rax, Address(reg, 0));
3648 // may be shorter code (however, this version of
3649 // testl needs to be implemented first)
3650 } else {
3651 // nothing to do, (later) access of M[reg + offset]
3652 // will provoke OS NULL exception if reg = NULL
3653 }
3654 }
3655
3656 void MacroAssembler::os_breakpoint() {
3657 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3658 // (e.g., MSVC can't call ps() otherwise)
3659 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3660 }
3661
3662 void MacroAssembler::unimplemented(const char* what) {
3663 char* b = new char[1024];
3664 jio_snprintf(b, 1024, "unimplemented: %s", what);
3665 stop(b);
3666 }
3667
3668 #ifdef _LP64
3669 #define XSTATE_BV 0x200
3670 #endif
3671
3672 void MacroAssembler::pop_CPU_state() {
3673 pop_FPU_state();
3674 pop_IU_state();
3675 }
3676
3677 void MacroAssembler::pop_FPU_state() {
3678 #ifndef _LP64
3679 frstor(Address(rsp, 0));
3680 #else
3681 fxrstor(Address(rsp, 0));
3682 #endif
3683 addptr(rsp, FPUStateSizeInWords * wordSize);
3684 }
3685
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3643 // provoke OS NULL exception if reg = NULL by
3644 // accessing M[reg] w/o changing any (non-CC) registers
3645 // NOTE: cmpl is plenty here to provoke a segv
3646 cmpptr(rax, Address(reg, 0));
3647 // Note: should probably use testl(rax, Address(reg, 0));
3648 // may be shorter code (however, this version of
3649 // testl needs to be implemented first)
3650 } else {
3651 // nothing to do, (later) access of M[reg + offset]
3652 // will provoke OS NULL exception if reg = NULL
3653 }
3654 }
3655
3656 void MacroAssembler::os_breakpoint() {
3657 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3658 // (e.g., MSVC can't call ps() otherwise)
3659 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3660 }
3661
3662 void MacroAssembler::unimplemented(const char* what) {
3663 const char* buf = NULL;
3664 {
3665 ResourceMark rm;
3666 stringStream ss;
3667 ss.print("unimplemented: %s", what);
3668 buf = code_string(ss.as_string());
3669 }
3670 stop(buf);
3671 }
3672
3673 #ifdef _LP64
3674 #define XSTATE_BV 0x200
3675 #endif
3676
3677 void MacroAssembler::pop_CPU_state() {
3678 pop_FPU_state();
3679 pop_IU_state();
3680 }
3681
3682 void MacroAssembler::pop_FPU_state() {
3683 #ifndef _LP64
3684 frstor(Address(rsp, 0));
3685 #else
3686 fxrstor(Address(rsp, 0));
3687 #endif
3688 addptr(rsp, FPUStateSizeInWords * wordSize);
3689 }
3690
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