src/os_cpu/windows_x86/vm/os_windows_x86.cpp

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rev 3149 : 7147740: add assertions to check stack alignment on VM entry from generated code (x64)
Summary: check stack alignment on VM entry on x64.
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 529 #ifdef AMD64
 530    return 0 ;
 531 #else
 532    // pause == rep:nop
 533    // On systems that don't support pause a rep:nop
 534    // is executed as a nop.  The rep: prefix is ignored.
 535    _asm {
 536       pause ;
 537    };
 538    return 1 ;
 539 #endif // AMD64
 540 }
 541 
 542 
 543 void os::setup_fpu() {
 544 #ifndef AMD64
 545   int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std();
 546   __asm fldcw fpu_cntrl_word;
 547 #endif // !AMD64
 548 }








 529 #ifdef AMD64
 530    return 0 ;
 531 #else
 532    // pause == rep:nop
 533    // On systems that don't support pause a rep:nop
 534    // is executed as a nop.  The rep: prefix is ignored.
 535    _asm {
 536       pause ;
 537    };
 538    return 1 ;
 539 #endif // AMD64
 540 }
 541 
 542 
 543 void os::setup_fpu() {
 544 #ifndef AMD64
 545   int fpu_cntrl_word = StubRoutines::fpu_cntrl_wrd_std();
 546   __asm fldcw fpu_cntrl_word;
 547 #endif // !AMD64
 548 }
 549 
 550 #ifndef PRODUCT
 551 void os::verify_stack_alignment() {
 552 }
 553 #endif