1 #------------------------------------------------------------------------------ 2 # 3 # Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> 4 # 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 # RShiftU64.S 15 # 16 # Abstract: 17 # 18 # 64-bit logical right shift function for IA-32 19 # 20 #------------------------------------------------------------------------------ 21 22 23 .code: 24 25 ASM_GLOBAL ASM_PFX(InternalMathRShiftU64) 26 27 #------------------------------------------------------------------------------ 28 # UINT64 29 # EFIAPI 30 # InternalMathRShiftU64 ( 31 # IN UINT64 Operand, 32 # IN UINTN Count 33 # ); 34 #------------------------------------------------------------------------------ 35 ASM_PFX(InternalMathRShiftU64): 36 movb 12(%esp), %cl # cl <- Count 37 xorl %edx, %edx 38 movl 8(%esp), %eax 39 testb $32, %cl # Count >= 32? 40 jnz L0 41 movl %eax, %edx 42 movl 0x4(%esp), %eax 43 L0: 44 shrdl %cl, %edx, %eax 45 shr %cl, %edx 46 ret 47
