diff options
Diffstat (limited to 'UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S')
-rw-r--r-- | UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S | 57 |
1 files changed, 0 insertions, 57 deletions
diff --git a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S deleted file mode 100644 index f0b0d3e264..0000000000 --- a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S +++ /dev/null @@ -1,57 +0,0 @@ -#------------------------------------------------------------------------------
-#*
-#* Copyright (c) 2009 - 2018, 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.
-#*
-#*
-#------------------------------------------------------------------------------
-
-#
-# Initializes floating point units for requirement of UEFI specification.
-#
-# This function initializes floating-point control word to 0x037F (all exceptions
-# masked,double-extended-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).
-#
-ASM_GLOBAL ASM_PFX(InitializeFloatingPointUnits)
-ASM_PFX(InitializeFloatingPointUnits):
-
- #
- # Initialize floating point units
- #
- finit
-
- #
- # Float control word initial value:
- # all exceptions masked, double-precision, round-to-nearest
- #
- pushq $0x037F
- lea (%rsp), %rax
- fldcw (%rax)
- popq %rax
-
- #
- # Set OSFXSR bit 9 in CR4
- #
- movq %cr4, %rax
- or $0x200, %rax
- movq %rax, %cr4
-
- #
- # Multimedia-extensions control word:
- # all exceptions masked, round-to-nearest, flush to zero for masked underflow
- #
- pushq $0x01F80
- lea (%rsp), %rax
- ldmxcsr (%rax)
- popq %rax
-
- ret
-
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