blob: 26c38a12267df5a47ebb18431a1169d1cf5713b3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; LShiftU64.nasm
;
; Abstract:
;
; 64-bit left shift function for IA-32
;
;------------------------------------------------------------------------------
SECTION .text
;------------------------------------------------------------------------------
; UINT64
; EFIAPI
; InternalMathLShiftU64 (
; IN UINT64 Operand,
; IN UINTN Count
; );
;------------------------------------------------------------------------------
global ASM_PFX(InternalMathLShiftU64)
ASM_PFX(InternalMathLShiftU64):
mov cl, [esp + 12]
xor eax, eax
mov edx, [esp + 4]
test cl, 32 ; Count >= 32?
jnz .0
mov eax, edx
mov edx, [esp + 8]
.0:
shld edx, eax, cl
shl eax, cl
ret
|