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comparison src/cpu/x86/vm/stubGenerator_x86_64.cpp @ 11167:46a90f83df31

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Merge
author morris
date Fri, 19 Jul 2013 13:59:25 -0700
parents 980532a806a5 0f57ccdb9084
children 6b0fd0964b87 740e263c80c6
comparison
equal deleted inserted replaced
11135:2285b4a0a4e6 11167:46a90f83df31
277 { 277 {
278 Label skip_ldmx; 278 Label skip_ldmx;
279 __ stmxcsr(mxcsr_save); 279 __ stmxcsr(mxcsr_save);
280 __ movl(rax, mxcsr_save); 280 __ movl(rax, mxcsr_save);
281 __ andl(rax, MXCSR_MASK); // Only check control and mask bits 281 __ andl(rax, MXCSR_MASK); // Only check control and mask bits
282 ExternalAddress mxcsr_std(StubRoutines::x86::mxcsr_std()); 282 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
283 __ cmp32(rax, mxcsr_std); 283 __ cmp32(rax, mxcsr_std);
284 __ jcc(Assembler::equal, skip_ldmx); 284 __ jcc(Assembler::equal, skip_ldmx);
285 __ ldmxcsr(mxcsr_std); 285 __ ldmxcsr(mxcsr_std);
286 __ bind(skip_ldmx); 286 __ bind(skip_ldmx);
287 } 287 }
727 727
728 const Address mxcsr_save(rsp, 0); 728 const Address mxcsr_save(rsp, 0);
729 729
730 if (CheckJNICalls) { 730 if (CheckJNICalls) {
731 Label ok_ret; 731 Label ok_ret;
732 ExternalAddress mxcsr_std(StubRoutines::addr_mxcsr_std());
732 __ push(rax); 733 __ push(rax);
733 __ subptr(rsp, wordSize); // allocate a temp location 734 __ subptr(rsp, wordSize); // allocate a temp location
734 __ stmxcsr(mxcsr_save); 735 __ stmxcsr(mxcsr_save);
735 __ movl(rax, mxcsr_save); 736 __ movl(rax, mxcsr_save);
736 __ andl(rax, MXCSR_MASK); // Only check control and mask bits 737 __ andl(rax, MXCSR_MASK); // Only check control and mask bits
737 __ cmpl(rax, *(int *)(StubRoutines::x86::mxcsr_std())); 738 __ cmp32(rax, mxcsr_std);
738 __ jcc(Assembler::equal, ok_ret); 739 __ jcc(Assembler::equal, ok_ret);
739 740
740 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall"); 741 __ warn("MXCSR changed by native JNI code, use -XX:+RestoreMXCSROnJNICall");
741 742
742 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); 743 __ ldmxcsr(mxcsr_std);
743 744
744 __ bind(ok_ret); 745 __ bind(ok_ret);
745 __ addptr(rsp, wordSize); 746 __ addptr(rsp, wordSize);
746 __ pop(rax); 747 __ pop(rax);
747 } 748 }
3765 (framesize >> (LogBytesPerWord - LogBytesPerInt)), 3766 (framesize >> (LogBytesPerWord - LogBytesPerInt)),
3766 oop_maps, false); 3767 oop_maps, false);
3767 return stub->entry_point(); 3768 return stub->entry_point();
3768 } 3769 }
3769 3770
3771 void create_control_words() {
3772 // Round to nearest, 53-bit mode, exceptions masked
3773 StubRoutines::_fpu_cntrl_wrd_std = 0x027F;
3774 // Round to zero, 53-bit mode, exception mased
3775 StubRoutines::_fpu_cntrl_wrd_trunc = 0x0D7F;
3776 // Round to nearest, 24-bit mode, exceptions masked
3777 StubRoutines::_fpu_cntrl_wrd_24 = 0x007F;
3778 // Round to nearest, 64-bit mode, exceptions masked
3779 StubRoutines::_fpu_cntrl_wrd_64 = 0x037F;
3780 // Round to nearest, 64-bit mode, exceptions masked
3781 StubRoutines::_mxcsr_std = 0x1F80;
3782 // Note: the following two constants are 80-bit values
3783 // layout is critical for correct loading by FPU.
3784 // Bias for strict fp multiply/divide
3785 StubRoutines::_fpu_subnormal_bias1[0]= 0x00000000; // 2^(-15360) == 0x03ff 8000 0000 0000 0000
3786 StubRoutines::_fpu_subnormal_bias1[1]= 0x80000000;
3787 StubRoutines::_fpu_subnormal_bias1[2]= 0x03ff;
3788 // Un-Bias for strict fp multiply/divide
3789 StubRoutines::_fpu_subnormal_bias2[0]= 0x00000000; // 2^(+15360) == 0x7bff 8000 0000 0000 0000
3790 StubRoutines::_fpu_subnormal_bias2[1]= 0x80000000;
3791 StubRoutines::_fpu_subnormal_bias2[2]= 0x7bff;
3792 }
3793
3770 // Initialization 3794 // Initialization
3771 void generate_initial() { 3795 void generate_initial() {
3772 // Generates all stubs and initializes the entry points 3796 // Generates all stubs and initializes the entry points
3773 3797
3774 // This platform-specific stub is needed by generate_call_stub() 3798 // This platform-specific settings are needed by generate_call_stub()
3775 StubRoutines::x86::_mxcsr_std = generate_fp_mask("mxcsr_std", 0x0000000000001F80); 3799 create_control_words();
3776 3800
3777 // entry points that exist in all platforms Note: This is code 3801 // entry points that exist in all platforms Note: This is code
3778 // that could be shared among different platforms - however the 3802 // that could be shared among different platforms - however the
3779 // benefit seems to be smaller than the disadvantage of having a 3803 // benefit seems to be smaller than the disadvantage of having a
3780 // much more complicated generator structure. See also comment in 3804 // much more complicated generator structure. See also comment in