audk/CryptoPkg/Library/IntrinsicLib/Ia32/MathRShiftU64.nasm
Michael D Kinney 2009f6b4c5 CryptoPkg: Replace BSD License with BSD+Patent License
https://bugzilla.tianocore.org/show_bug.cgi?id=1373

Replace BSD 2-Clause License with BSD+Patent License.  This change is
based on the following emails:

  https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
  https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html

RFCs with detailed process for the license change:

  V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
  V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
  V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jian J Wang <jian.j.wang@intel.com>
2019-04-09 09:10:22 -07:00

44 lines
974 B
NASM

;------------------------------------------------------------------------------
;
; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; MathRShiftU64.nasm
;
; Abstract:
;
; 64-bit Math Worker Function.
; Shifts a 64-bit unsigned value right by a certain number of bits.
;
;------------------------------------------------------------------------------
SECTION .text
;------------------------------------------------------------------------------
;
; void __cdecl __ashrdi3 (void)
;
;------------------------------------------------------------------------------
global ASM_PFX(__ashrdi3)
ASM_PFX(__ashrdi3):
cmp cl,0x40
jnc _Exit
cmp cl,0x20
jnc More32
shrd eax,edx,cl
shr edx,cl
ret
More32:
mov eax,edx
xor edx,edx
and cl,0x1f
shr eax,cl
ret
_Exit:
xor eax,eax
xor edx,edx
ret