#------------------------------------------------------------------------------ # # Copyright (c) 2009 - 2013, 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: # # MathRShiftU64.S # # Abstract: # # 64-bit Math Worker Function. # Shifts a 64-bit unsigned value right by a certain number of bits. # #------------------------------------------------------------------------------ .686: .code: ASM_GLOBAL ASM_PFX(__ashrdi3) #------------------------------------------------------------------------------ # # void __cdecl __ashrdi3 (void) # #------------------------------------------------------------------------------ ASM_PFX(__ashrdi3): # # Checking: Only handle 64bit shifting or more # cmpb $64, %cl jae _Exit # # Handle shifting between 0 and 31 bits # cmpb $32, %cl jae More32 shrd %cl, %edx, %eax shr %cl, %edx ret # # Handle shifting of 32-63 bits # More32: movl %edx, %eax xor %edx, %edx and $31, %cl shr %cl, %eax ret # # Invalid number (less then 32bits), return 0 # _Exit: xor %eax, %eax xor %edx, %edx ret