[mirror_edk2.git] / OldMdePkg / Library / BaseLib / X64 / CpuId.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006, Intel Corporation
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
#   CpuId.S
#
# Abstract:
#
#   AsmCpuid function
#
# Notes:
#
#------------------------------------------------------------------------------

#------------------------------------------------------------------------------
#  VOID
#  EFIAPI
#  AsmCpuid (
#    IN   UINT32  RegisterInEax,
#    OUT  UINT32  *RegisterOutEax  OPTIONAL,
#    OUT  UINT32  *RegisterOutEbx  OPTIONAL,
#    OUT  UINT32  *RegisterOutEcx  OPTIONAL,
#    OUT  UINT32  *RegisterOutEdx  OPTIONAL
#    )
#------------------------------------------------------------------------------
.global _AsmCpuid;
_AsmCpuid:
    push    %rbx
    mov     %ecx, %eax
    push    %rax                         # save Index on stack
    push    %rdx
    cpuid
    test    %r9, %r9
    jz      L1
    mov     %ecx, (%r9)
L1:
    pop     %rcx
    jrcxz   L2
    mov     %eax, (%rcx)
L2:
    mov     %r8, %rcx
    jrcxz   L3
    mov     %ebx, (%rcx)
L3:
    mov     0x38(%rsp), %rcx
    jrcxz   L4
    mov     %edx, (%rcx)
L4:
    pop     %rax                         # restore Index to rax as return value
    pop     %rbx
    ret
Commit	Line	Data
e29e52e7	1	#------------------------------------------------------------------------------
	2	#
	3	# Copyright (c) 2006, Intel Corporation
	4	# All rights reserved. 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	# CpuId.S
	15	#
	16	# Abstract:
	17	#
	18	# AsmCpuid function
	19	#
	20	# Notes:
	21	#
	22	#------------------------------------------------------------------------------
	23
	24	#------------------------------------------------------------------------------
	25	# VOID
	26	# EFIAPI
	27	# AsmCpuid (
	28	# IN UINT32 RegisterInEax,
	29	# OUT UINT32 *RegisterOutEax OPTIONAL,
	30	# OUT UINT32 *RegisterOutEbx OPTIONAL,
	31	# OUT UINT32 *RegisterOutEcx OPTIONAL,
	32	# OUT UINT32 *RegisterOutEdx OPTIONAL
	33	# )
	34	#------------------------------------------------------------------------------
	35	.global _AsmCpuid;
	36	_AsmCpuid:
	37	push %rbx
	38	mov %ecx, %eax
	39	push %rax # save Index on stack
	40	push %rdx
	41	cpuid
	42	test %r9, %r9
	43	jz L1
	44	mov %ecx, (%r9)
	45	L1:
	46	pop %rcx
	47	jrcxz L2
	48	mov %eax, (%rcx)
	49	L2:
	50	mov %r8, %rcx
	51	jrcxz L3
	52	mov %ebx, (%rcx)
	53	L3:
	54	mov 0x38(%rsp), %rcx
	55	jrcxz L4
	56	mov %edx, (%rcx)
	57	L4:
	58	pop %rax # restore Index to rax as return value
	59	pop %rbx
	60	ret