1 #------------------------------------------------------------------------------ 2 # 3 # Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR> 4 # This program and the accompanying materials are licensed and made available 5 # under the terms and conditions of the BSD License which accompanies this 6 # 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 # MathLShiftS64.S 15 # 16 # Abstract: 17 # 18 # 64-bit Math Worker Function. 19 # Shifts a 64-bit signed value left by a certain number of bits. 20 # 21 #------------------------------------------------------------------------------ 22 23 .686: 24 .code: 25 26 ASM_GLOBAL ASM_PFX(__ashldi3) 27 28 #------------------------------------------------------------------------------ 29 # 30 # void __cdecl __ashldi3 (void) 31 # 32 #------------------------------------------------------------------------------ 33 ASM_PFX(__ashldi3): 34 # 35 # Handle shifting of 64 or more bits (return 0) 36 # 37 cmpb $64, %cl 38 jae ReturnZero 39 40 # 41 # Handle shifting of between 0 and 31 bits 42 # 43 cmpb $32, %cl 44 jae More32 45 shld %cl, %eax, %edx 46 shl %cl, %eax 47 ret 48 49 # 50 # Handle shifting of between 32 and 63 bits 51 # 52 More32: 53 movl %eax, %edx 54 xor %eax, %eax 55 and $31, %cl 56 shl %cl, %edx 57 ret 58 59 ReturnZero: 60 xor %eax, %eax 61 xor %edx, %edx 62 ret 63
