diff options
Diffstat (limited to 'UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm')
-rw-r--r-- | UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm deleted file mode 100644 index 331af15cc6..0000000000 --- a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm +++ /dev/null @@ -1,62 +0,0 @@ -;------------------------------------------------------------------------------
-;*
-;* Copyright (c) 2009 - 2012, 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.
-;*
-;*
-;------------------------------------------------------------------------------
-
-
-.const
-;
-; Float control word initial value:
-; all exceptions masked, double-extended-precision, round-to-nearest
-;
-mFpuControlWord DW 037Fh
-;
-; Multimedia-extensions control word:
-; all exceptions masked, round-to-nearest, flush to zero for masked underflow
-;
-mMmxControlWord DD 01F80h
-
-.code
-
-
-;
-; Initializes floating point units for requirement of UEFI specification.
-;
-; This function initializes floating-point control word to 0x027F (all exceptions
-; masked,double-precision, round-to-nearest) and multimedia-extensions control word
-; (if supported) to 0x1F80 (all exceptions masked, round-to-nearest, flush to zero
-; for masked underflow).
-;
-InitializeFloatingPointUnits PROC PUBLIC
-
- ;
- ; Initialize floating point units
- ;
- ; The following opcodes stand for instruction 'finit'
- ; to be supported by some 64-bit assemblers
- ;
- DB 9Bh, 0DBh, 0E3h
- fldcw mFpuControlWord
-
- ;
- ; Set OSFXSR bit 9 in CR4
- ;
- mov rax, cr4
- or rax, BIT9
- mov cr4, rax
-
- ldmxcsr mMmxControlWord
-
- ret
-InitializeFloatingPointUnits ENDP
-
-END
|