[mirror_edk2.git] / OldMdePkg / Library / BaseLib / Ia32 / ARShiftU64.S

#------------------------------------------------------------------------------\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
#   ARShiftU64.asm\r
#\r
# Abstract:\r
#\r
#   64-bit arithmetic right shift function for IA-32\r
#\r
#------------------------------------------------------------------------------\r
\r
.globl ASM_PFX(InternalMathARShiftU64)\r
\r
#------------------------------------------------------------------------------\r
# UINT64\r
# EFIAPI\r
# InternalMathARShiftU64 (\r
#   IN      UINT64                    Operand,\r
#   IN      UINTN                     Count\r
#   );\r
#------------------------------------------------------------------------------\r
ASM_PFX(InternalMathARShiftU64):\r
    movb    12(%esp), %cl\r
    movl    8(%esp), %eax\r
    cltd\r
    testb   $32, %cl\r
    cmovz   %eax, %edx\r
    cmovz   4(%esp), %eax\r
    shrdl   %cl, %edx, %eax\r
    sar     %cl, %edx\r
    ret\r
Commit	Line	Data
878ddf1f	1	#------------------------------------------------------------------------------\r
	2	#\r
	3	# Copyright (c) 2006, Intel Corporation\r
	4	# All rights reserved. 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	# ARShiftU64.asm\r
	15	#\r
	16	# Abstract:\r
	17	#\r
	18	# 64-bit arithmetic right shift function for IA-32\r
	19	#\r
	20	#------------------------------------------------------------------------------\r
	21	\r
a2b1bf96	22	.globl ASM_PFX(InternalMathARShiftU64)\r
3f566587	23	\r
	24	#------------------------------------------------------------------------------\r
	25	# UINT64\r
	26	# EFIAPI\r
	27	# InternalMathARShiftU64 (\r
	28	# IN UINT64 Operand,\r
	29	# IN UINTN Count\r
	30	# );\r
	31	#------------------------------------------------------------------------------\r
a2b1bf96	32	ASM_PFX(InternalMathARShiftU64):\r
3f566587	33	movb 12(%esp), %cl\r
3f566587	34	movl 8(%esp), %eax\r
878ddf1f	35	cltd\r
3f566587	36	testb $32, %cl\r
878ddf1f	37	cmovz %eax, %edx\r
878ddf1f	38	cmovz 4(%esp), %eax\r
3f566587	39	shrdl %cl, %edx, %eax\r
3f566587	40	sar %cl, %edx\r
878ddf1f	41	ret\r