diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/Ia32/LRotU64.S')
| -rw-r--r-- | MdePkg/Library/BaseLib/Ia32/LRotU64.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/Ia32/LRotU64.S b/MdePkg/Library/BaseLib/Ia32/LRotU64.S new file mode 100644 index 000000000000..87a6b5b9a20d --- /dev/null +++ b/MdePkg/Library/BaseLib/Ia32/LRotU64.S @@ -0,0 +1,48 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR> +# 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: +# +# LRotU64.S +# +# Abstract: +# +# 64-bit left rotation for Ia32 +# +#------------------------------------------------------------------------------ + +ASM_GLOBAL ASM_PFX(InternalMathLRotU64) + +#------------------------------------------------------------------------------ +# UINT64 +# EFIAPI +# InternalMathLRotU64 ( +# IN UINT64 Operand, +# IN UINTN Count +# ); +#------------------------------------------------------------------------------ +ASM_PFX(InternalMathLRotU64): + push %ebx + movb 16(%esp), %cl + movl 12(%esp), %edx + movl 8(%esp), %eax + shldl %cl, %edx, %ebx + shldl %cl, %eax, %edx + rorl %cl, %ebx + shldl %cl, %ebx, %eax + testb $32, %cl # Count >= 32? + jz L0 + movl %eax, %ecx + movl %edx, %eax + movl %ecx, %edx +L0: + pop %ebx + ret |