[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / RShiftU64.S

//\r
// Include common header file for this module.\r
//\r
#include "CommonHeader.h"\r
\r
#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006, Intel Corporation\r
# All rights reserved. This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
# Module Name:\r
#\r
#   RShiftU64.asm\r
#\r
# Abstract:\r
#\r
#   64-bit logical right shift function for IA-32\r
#\r
#------------------------------------------------------------------------------\r
\r
    .686:\r
    .code:\r
\r
.globl ASM_PFX(InternalMathRShiftU64)\r
\r
#------------------------------------------------------------------------------\r
# UINT64\r
# EFIAPI\r
# InternalMathRShiftU64 (\r
#   IN      UINT64                    Operand,\r
#   IN      UINTN                     Count\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_PFX(InternalMathRShiftU64):\r
    movb    12(%esp), %cl\r
    xorl    %edx, %edx\r
    movl    8(%esp), %eax\r
    testb   $32, %cl\r
    cmovz   %eax, %edx\r
    cmovz   0x4(%esp), %eax\r
    shrdl   %cl, %edx, %eax\r
    shr     %cl, %edx\r
    ret\r
Commit	Line	Data
e1f414b6	1	//\r
	2	// Include common header file for this module.\r
	3	//\r
	4	#include "CommonHeader.h"\r
	5	\r
	6	#------------------------------------------------------------------------------\r
	7	#\r
	8	# Copyright (c) 2006, Intel Corporation\r
	9	# All rights reserved. This program and the accompanying materials\r
	10	# are licensed and made available under the terms and conditions of the BSD License\r
	11	# which accompanies this distribution. The full text of the license may be found at\r
	12	# http://opensource.org/licenses/bsd-license.php\r
	13	#\r
	14	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	15	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	16	#\r
	17	# Module Name:\r
	18	#\r
	19	# RShiftU64.asm\r
	20	#\r
	21	# Abstract:\r
	22	#\r
	23	# 64-bit logical right shift function for IA-32\r
	24	#\r
	25	#------------------------------------------------------------------------------\r
	26	\r
	27	.686:\r
	28	.code:\r
	29	\r
	30	.globl ASM_PFX(InternalMathRShiftU64)\r
	31	\r
	32	#------------------------------------------------------------------------------\r
	33	# UINT64\r
	34	# EFIAPI\r
	35	# InternalMathRShiftU64 (\r
	36	# IN UINT64 Operand,\r
	37	# IN UINTN Count\r
	38	# );\r
	39	#------------------------------------------------------------------------------\r
	40	ASM_PFX(InternalMathRShiftU64):\r
	41	movb 12(%esp), %cl\r
	42	xorl %edx, %edx\r
	43	movl 8(%esp), %eax\r
	44	testb $32, %cl\r
	45	cmovz %eax, %edx\r
	46	cmovz 0x4(%esp), %eax\r
	47	shrdl %cl, %edx, %eax\r
	48	shr %cl, %edx\r
	49	ret\r