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cbe09e31 LG |
1 | ;------------------------------------------------------------------------------\r |
2 | ;\r | |
3 | ; Copyright (c) 2016, Intel Corporation. All rights reserved.<BR>\r | |
2009f6b4 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
cbe09e31 LG |
5 | ;\r |
6 | ; Module Name:\r | |
7 | ;\r | |
8 | ; MathLShiftS64.nasm\r | |
9 | ;\r | |
10 | ; Abstract:\r | |
11 | ;\r | |
12 | ; 64-bit Math Worker Function.\r | |
13 | ; Shifts a 64-bit signed value left by a certain number of bits.\r | |
14 | ;\r | |
15 | ;------------------------------------------------------------------------------\r | |
16 | \r | |
17 | SECTION .text\r | |
18 | \r | |
19 | global ASM_PFX(__ashldi3)\r | |
20 | ;------------------------------------------------------------------------------\r | |
21 | ;\r | |
22 | ; void __cdecl __ashldi3 (void)\r | |
23 | ;\r | |
24 | ;------------------------------------------------------------------------------\r | |
25 | ASM_PFX(__ashldi3):\r | |
26 | cmp cl,0x40\r | |
27 | jnc ReturnZero\r | |
28 | cmp cl,0x20\r | |
29 | jnc More32\r | |
30 | shld edx,eax,cl\r | |
31 | shl eax,cl\r | |
32 | ret\r | |
33 | More32:\r | |
34 | mov edx,eax\r | |
35 | xor eax,eax\r | |
36 | and cl,0x1f\r | |
37 | shl edx,cl\r | |
38 | ret\r | |
39 | ReturnZero:\r | |
40 | xor eax,eax\r | |
41 | xor edx,edx\r | |
42 | ret\r |