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authorrsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>2012-07-05 08:44:57 +0000
committerrsun3 <rsun3@6f19259b-4bc3-4df7-8a09-765794883524>2012-07-05 08:44:57 +0000
commite768377c22bda1801ee3fb63e49390d69d83953b (patch)
tree17cb53d3327f666cff641ed5c63843791fc16b8c
parent8f8ca22e594e3a6c313f725fbc7e2b20d75c79fd (diff)
downloadedk2-platforms-e768377c22bda1801ee3fb63e49390d69d83953b.tar.xz
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
-rw-r--r--UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.S8
-rw-r--r--UefiCpuPkg/Library/BaseUefiCpuLib/X64/InitializeFpu.asm6
2 files changed, 7 insertions, 7 deletions
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