1;------------------------------------------------------------------------------ 2; 3; Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 4; This program and the accompanying materials 5; are licensed and made available under the terms and conditions of the BSD License 6; which accompanies this distribution. The full text of the license may be found at 7; http://opensource.org/licenses/bsd-license.php. 8; 9; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11; 12; Module Name: 13; 14; ReadTsc.Asm 15; 16; Abstract: 17; 18; AsmReadTsc function 19; 20; Notes: 21; 22;------------------------------------------------------------------------------ 23 24 DEFAULT REL 25 SECTION .text 26 27;------------------------------------------------------------------------------ 28; UINT64 29; EFIAPI 30; AsmReadTsc ( 31; VOID 32; ); 33;------------------------------------------------------------------------------ 34global ASM_PFX(AsmReadTsc) 35ASM_PFX(AsmReadTsc): 36 rdtsc 37 shl rdx, 0x20 38 or rax, rdx 39 ret 40 41