From e768377c22bda1801ee3fb63e49390d69d83953b Mon Sep 17 00:00:00 2001
From: rsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Thu, 5 Jul 2012 08:44:57 +0000
Subject: UefiCpuPkg BaseUefiCpuLib: Change the initialization value for x87
 FPU Control Word for x64 arch from 0x27f to 0x37f per UEFI 2.3.1c spec.

Signed-off-by: Sun Rui <rui.sun@intel.com>
Reviewed-by: Fan Jeff <jeff.fan@intel.com>


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13506 6f19259b-4bc3-4df7-8a09-765794883524
---
 UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S   | 8 ++++----
 UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

(limited to 'UefiCpuPkg')

diff --git a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S
index 64750afb85..9c51772adc 100644
--- a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S
+++ b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S
@@ -1,6 +1,6 @@
 #------------------------------------------------------------------------------
 #*
-#*   Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+#*   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
@@ -15,8 +15,8 @@
 #
 # 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
+# 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).
 #
@@ -32,7 +32,7 @@ ASM_PFX(InitializeFloatingPointUnits):
     # Float control word initial value: 
     # all exceptions masked, double-precision, round-to-nearest
     #
-    pushq   $0x027F
+    pushq   $0x037F
     lea     (%rsp), %rax 
     fldcw   (%rax)
     popq    %rax
diff --git a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm
index 0a036b6ae3..9cde66eecd 100644
--- a/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm
+++ b/UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm
@@ -1,6 +1,6 @@
 ;------------------------------------------------------------------------------
 ;*
-;*   Copyright (c) 2009, Intel Corporation. All rights reserved.<BR>
+;*   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
@@ -16,9 +16,9 @@
 .const
 ;
 ; Float control word initial value: 
-; all exceptions masked, double-precision, round-to-nearest
+; all exceptions masked, double-extended-precision, round-to-nearest
 ;
-mFpuControlWord       DW      027Fh
+mFpuControlWord       DW      037Fh
 ;
 ; Multimedia-extensions control word:
 ; all exceptions masked, round-to-nearest, flush to zero for masked underflow
-- 
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