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76a77878 JJ |
1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
76a77878 JJ |
5 | ;\r |
6 | ; Module Name:\r | |
7 | ;\r | |
8 | ; LShiftU64.nasm\r | |
9 | ;\r | |
10 | ; Abstract:\r | |
11 | ;\r | |
12 | ; 64-bit left shift function for IA-32\r | |
13 | ;\r | |
14 | ;------------------------------------------------------------------------------\r | |
15 | \r | |
16 | SECTION .text\r | |
17 | \r | |
18 | ;------------------------------------------------------------------------------\r | |
19 | ; UINT64\r | |
20 | ; EFIAPI\r | |
21 | ; InternalMathLShiftU64 (\r | |
22 | ; IN UINT64 Operand,\r | |
23 | ; IN UINTN Count\r | |
24 | ; );\r | |
25 | ;------------------------------------------------------------------------------\r | |
26 | global ASM_PFX(InternalMathLShiftU64)\r | |
27 | ASM_PFX(InternalMathLShiftU64):\r | |
28 | mov cl, [esp + 12]\r | |
29 | xor eax, eax\r | |
30 | mov edx, [esp + 4]\r | |
31 | test cl, 32 ; Count >= 32?\r | |
32 | jnz .0\r | |
33 | mov eax, edx\r | |
34 | mov edx, [esp + 8]\r | |
35 | .0:\r | |
36 | shld edx, eax, cl\r | |
37 | shl eax, cl\r | |
38 | ret\r | |
39 | \r |