Michael Kinney 88a75d260c MdePkg/BaseLib: Support IA32 processors without CMOVx
Remove use of CMOVx instruction from IA32 assembly files in BaseLib.  
This matches compiler flags for all supported C compilers.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17213 6f19259b-4bc3-4df7-8a09-765794883524
2015-04-27 19:38:39 +00:00

52 lines
1.5 KiB
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2015, 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.
;
; Module Name:
;
; LRotU64.asm
;
; Abstract:
;
; 64-bit left rotation for Ia32
;
;------------------------------------------------------------------------------
.686
.model flat,C
.code
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; InternalMathLRotU64 (
; IN UINT64 Operand,
; IN UINTN Count
; );
;------------------------------------------------------------------------------
InternalMathLRotU64 PROC USES ebx
mov cl, [esp + 16]
mov edx, [esp + 12]
mov eax, [esp + 8]
shld ebx, edx, cl
shld edx, eax, cl
ror ebx, cl
shld eax, ebx, cl
test cl, 32 ; Count >= 32?
jz @F
mov ecx, eax
mov eax, edx
mov edx, ecx
@@:
ret
InternalMathLRotU64 ENDP
END