diff options
Diffstat (limited to 'OldMdePkg/Library/BaseLib/X64/ReadTsc.S')
| -rw-r--r-- | OldMdePkg/Library/BaseLib/X64/ReadTsc.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/OldMdePkg/Library/BaseLib/X64/ReadTsc.S b/OldMdePkg/Library/BaseLib/X64/ReadTsc.S new file mode 100644 index 0000000000..776ffc2265 --- /dev/null +++ b/OldMdePkg/Library/BaseLib/X64/ReadTsc.S @@ -0,0 +1,38 @@ +#------------------------------------------------------------------------------ +# +# Copyright (c) 2006, 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: +# +# ReadTsc.S +# +# Abstract: +# +# AsmReadTsc function +# +# Notes: +# +#------------------------------------------------------------------------------ + + +#------------------------------------------------------------------------------ +# UINT64 +# EFIAPI +# AsmReadTsc ( +# VOID +# ); +#------------------------------------------------------------------------------ +.global _AsmReadTsc; +.align 16; +_AsmReadTsc: + rdtsc + shl $0x20, %rdx + or %rdx, %rax + ret |