QueryPerformanceCounter from Windows 10 v1903

QueryPerformanceCounter_1903.disasm

00007FFE496CBBB0  mov         qword ptr [rsp+8],rbx  
00007FFE496CBBB5  push        rdi  
00007FFE496CBBB6  sub         rsp,20h  
00007FFE496CBBBA  mov         r8b,byte ptr [7FFE03C6h]  
00007FFE496CBBC2  mov         rbx,rcx  
00007FFE496CBBC5  test        r8b,1  
00007FFE496CBBC9  je          00007FFE496CBC3B  
00007FFE496CBBCB  mov         r11,qword ptr [7FFE03B8h]  
00007FFE496CBBD3  test        r8b,2  
00007FFE496CBBD7  je          00007FFE497698FF  
00007FFE496CBBDD  mov         r9,qword ptr [7FFE49823EC8h]  
00007FFE496CBBE4  test        r9,r9  
00007FFE496CBBE7  je          00007FFE496CBC3B  
00007FFE496CBBE9  mov         r10d,dword ptr [r9]  
00007FFE496CBBEC  test        r10d,r10d  
00007FFE496CBBEF  je          00007FFE496CBC3B  
00007FFE496CBBF1  test        r8b,r8b  
00007FFE496CBBF4  jns         00007FFE497698E4  
00007FFE496CBBFA  rdtscp  
00007FFE496CBBFD  shl         rdx,20h  
00007FFE496CBC01  or          rdx,rax  
00007FFE496CBC04  mov         rax,qword ptr [r9+8]  
00007FFE496CBC08  mov         rcx,qword ptr [r9+10h]  
00007FFE496CBC0C  mul         rax,rdx  
00007FFE496CBC0F  mov         eax,dword ptr [r9]  
00007FFE496CBC12  add         rdx,rcx  
00007FFE496CBC15  cmp         eax,r10d  
00007FFE496CBC18  jne         00007FFE496CBBE9  
00007FFE496CBC1A  mov         cl,byte ptr [7FFE03C7h]  
00007FFE496CBC21  lea         rax,[rdx+r11]  
00007FFE496CBC25  shr         rax,cl  
00007FFE496CBC28  mov         qword ptr [rbx],rax  
00007FFE496CBC2B  mov         eax,1  
00007FFE496CBC30  mov         rbx,qword ptr [rsp+30h]  
00007FFE496CBC35  add         rsp,20h  
00007FFE496CBC39  pop         rdi  
00007FFE496CBC3A  ret  

Previous version (v1809)

00007FF869889362  sub         rsp,20h  
00007FF869889366  mov         al,byte ptr [7FFE03C6h]  
00007FF86988936D  mov         rbx,rcx  
00007FF869889370  test        al,1  
00007FF869889372  je          00007FF8698893A9  
00007FF869889374  mov         r8,qword ptr [7FFE03B8h]  
00007FF86988937C  test        al,al  
00007FF86988937E  jns         00007FF869921020  
00007FF869889384  rdtscp  
00007FF869889387  mov         cl,byte ptr [7FFE03C7h]  
00007FF86988938E  shl         rdx,20h  
00007FF869889392  or          rax,rdx  
00007FF869889395  add         rax,r8  
00007FF869889398  shr         rax,cl  
00007FF86988939B  mov         qword ptr [rbx],rax  
00007FF86988939E  mov         eax,1  
00007FF8698893A3  add         rsp,20h  
00007FF8698893A7  pop         rbx  
00007FF8698893A8  ret

v1903 with symbols from MS symbol store:

RtlQueryPerformanceCounter:
00007FFE7CD6BBB0  mov         qword ptr [rsp+8],rbx  
00007FFE7CD6BBB5  push        rdi  
00007FFE7CD6BBB6  sub         rsp,20h  
00007FFE7CD6BBBA  mov         r8b,byte ptr [7FFE03C6h]  
00007FFE7CD6BBC2  mov         rbx,rcx  
00007FFE7CD6BBC5  test        r8b,1  
00007FFE7CD6BBC9  je          RtlQueryPerformanceCounter+8Bh (07FFE7CD6BC3Bh)  
00007FFE7CD6BBCB  mov         r11,qword ptr [7FFE03B8h]  
00007FFE7CD6BBD3  test        r8b,2  
00007FFE7CD6BBD7  je          memset+697Fh (07FFE7CE098FFh)  
00007FFE7CD6BBDD  mov         r9,qword ptr [RtlpHypervisorSharedUserVa (07FFE7CEC3EC8h)]  
00007FFE7CD6BBE4  test        r9,r9  
00007FFE7CD6BBE7  je          RtlQueryPerformanceCounter+8Bh (07FFE7CD6BC3Bh)  
00007FFE7CD6BBE9  mov         r10d,dword ptr [r9]  
00007FFE7CD6BBEC  test        r10d,r10d  
00007FFE7CD6BBEF  je          RtlQueryPerformanceCounter+8Bh (07FFE7CD6BC3Bh)  
00007FFE7CD6BBF1  test        r8b,r8b  
00007FFE7CD6BBF4  jns         memset+6964h (07FFE7CE098E4h)  
00007FFE7CD6BBFA  rdtscp  
00007FFE7CD6BBFD  shl         rdx,20h  
00007FFE7CD6BC01  or          rdx,rax  
00007FFE7CD6BC04  mov         rax,qword ptr [r9+8]  
00007FFE7CD6BC08  mov         rcx,qword ptr [r9+10h]  
00007FFE7CD6BC0C  mul         rax,rdx  
00007FFE7CD6BC0F  mov         eax,dword ptr [r9]  
00007FFE7CD6BC12  add         rdx,rcx  
00007FFE7CD6BC15  cmp         eax,r10d  
00007FFE7CD6BC18  jne         RtlQueryPerformanceCounter+39h (07FFE7CD6BBE9h)  
00007FFE7CD6BC1A  mov         cl,byte ptr [7FFE03C7h]  
00007FFE7CD6BC21  lea         rax,[rdx+r11]  
00007FFE7CD6BC25  shr         rax,cl  
00007FFE7CD6BC28  mov         qword ptr [rbx],rax  
00007FFE7CD6BC2B  mov         eax,1  
00007FFE7CD6BC30  mov         rbx,qword ptr [rsp+30h]  
00007FFE7CD6BC35  add         rsp,20h  
00007FFE7CD6BC39  pop         rdi  
00007FFE7CD6BC3A  ret  
00007FFE7CD6BC3B  xor         edx,edx  
00007FFE7CD6BC3D  lea         rcx,[rsp+40h]  
00007FFE7CD6BC42  call        NtQueryPerformanceCounter (07FFE7CDFC670h)  
00007FFE7CD6BC47  mov         rax,qword ptr [rsp+40h]  
00007FFE7CD6BC4C  jmp         RtlQueryPerformanceCounter+78h (07FFE7CD6BC28h)