[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LShiftU64.S

#------------------------------------------------------------------------------\r
#\r
# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r
# 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
#   LShiftU64.S\r
#\r
# Abstract:\r
#\r
#   64-bit left shift function for IA-32\r
#\r
#------------------------------------------------------------------------------\r
\r
ASM_GLOBAL ASM_PFX(InternalMathLShiftU64)\r
\r
#------------------------------------------------------------------------------\r
# UINT64\r
# EFIAPI\r
# InternalMathLShiftU64 (\r
#   IN      UINT64                    Operand,\r
#   IN      UINTN                     Count\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_PFX(InternalMathLShiftU64):\r
    movb    12(%esp), %cl\r
    xorl    %eax, %eax\r
    movl    4(%esp), %edx\r
    testb   $32, %cl                    # Count >= 32?\r
    jnz     L0\r
    movl    %edx, %eax\r
    movl    0x8(%esp), %edx\r
L0:    \r
    shld    %cl, %eax, %edx\r
    shl     %cl, %eax\r
    ret\r
Commit	Line	Data
	1	#------------------------------------------------------------------------------\r
	2	#\r
	3	# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r
	4	# This program and the accompanying materials\r
	5	# are licensed and made available under the terms and conditions of the BSD License\r
	6	# which accompanies this distribution. The full text of the license may be found at\r
	7	# http://opensource.org/licenses/bsd-license.php.\r
	8	#\r
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	11	#\r
	12	# Module Name:\r
	13	#\r
	14	# LShiftU64.S\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# 64-bit left shift function for IA-32\r
	19	#\r
	20	#------------------------------------------------------------------------------\r
	21	\r
	22	ASM_GLOBAL ASM_PFX(InternalMathLShiftU64)\r
	23	\r
	24	#------------------------------------------------------------------------------\r
	25	# UINT64\r
	26	# EFIAPI\r
	27	# InternalMathLShiftU64 (\r
	28	# IN UINT64 Operand,\r
	29	# IN UINTN Count\r
	30	# );\r
	31	#------------------------------------------------------------------------------\r
	32	ASM_PFX(InternalMathLShiftU64):\r
	33	movb 12(%esp), %cl\r
	34	xorl %eax, %eax\r
	35	movl 4(%esp), %edx\r
	36	testb $32, %cl # Count >= 32?\r
	37	jnz L0\r
	38	movl %edx, %eax\r
	39	movl 0x8(%esp), %edx\r
	40	L0: \r
	41	shld %cl, %eax, %edx\r
	42	shl %cl, %eax\r
	43	ret\r