[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadTsc.c

/** @file\r
  AsmReadTsc function\r
\r
  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
\r
\r
/**\r
  Reads the current value of Time Stamp Counter (TSC).\r
\r
  Reads and returns the current value of TSC. This function is only available\r
  on IA-32 and x64.\r
\r
  @return The current value of TSC\r
\r
**/\r
UINT64\r
EFIAPI\r
AsmReadTsc (\r
  VOID\r
  )\r
{\r
  _asm {\r
    rdtsc\r
  }\r
}\r
\r
Commit	Line	Data
	1	/** @file\r
	2	AsmReadTsc function\r
	3	\r
	4	Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
	6	\r
	7	**/\r
	8	\r
	9	\r
	10	\r
	11	\r
	12	/**\r
	13	Reads the current value of Time Stamp Counter (TSC).\r
	14	\r
	15	Reads and returns the current value of TSC. This function is only available\r
	16	on IA-32 and x64.\r
	17	\r
	18	@return The current value of TSC\r
	19	\r
	20	**/\r
	21	UINT64\r
	22	EFIAPI\r
	23	AsmReadTsc (\r
	24	VOID\r
	25	)\r
	26	{\r
	27	_asm {\r
	28	rdtsc\r
	29	}\r
	30	}\r
	31	\r