[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadMm2.c

/** @file\r
  AsmReadMm2 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 64-bit MMX Register #2 (MM2).\r
\r
  Reads and returns the current value of MM2. This function is only available\r
  on IA-32 and x64.\r
\r
  @return The current value of MM2.\r
\r
**/\r
UINT64\r
EFIAPI\r
AsmReadMm2 (\r
  VOID\r
  )\r
{\r
  _asm {\r
    push    eax\r
    push    eax\r
    movq    [esp], mm2\r
    pop     eax\r
    pop     edx\r
    emms\r
  }\r
}\r
\r
Commit	Line	Data
e1f414b6	1	/** @file\r
	2	AsmReadMm2 function\r
	3	\r
bb817c56	4	Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
9344f092	5	SPDX-License-Identifier: BSD-2-Clause-Patent\r
e1f414b6	6	\r
	7	**/\r
	8	\r
1efcc4ae	9	\r
f734a10a	10	\r
e1f414b6	11	\r
42eedea9	12	/**\r
	13	Reads the current value of 64-bit MMX Register #2 (MM2).\r
	14	\r
	15	Reads and returns the current value of MM2. This function is only available\r
030cd1a2	16	on IA-32 and x64.\r
42eedea9	17	\r
	18	@return The current value of MM2.\r
	19	\r
	20	**/\r
e1f414b6	21	UINT64\r
	22	EFIAPI\r
	23	AsmReadMm2 (\r
	24	VOID\r
	25	)\r
	26	{\r
	27	_asm {\r
	28	push eax\r
	29	push eax\r
	30	movq [esp], mm2\r
	31	pop eax\r
	32	pop edx\r
	33	emms\r
	34	}\r
	35	}\r
	36	\r