1 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
2 | // See https://llvm.org/LICENSE.txt for license information. |
3 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
4 | |
5 | #include "../assembly.h" |
6 | |
7 | // di_int __muldi3(di_int a, di_int b); |
8 | |
9 | #ifdef __i386__ |
10 | |
11 | .text |
12 | .balign 4 |
13 | DEFINE_COMPILERRT_FUNCTION(__muldi3) |
14 | pushl %ebx |
15 | movl 16(%esp), %eax // b.lo |
16 | movl 12(%esp), %ecx // a.hi |
17 | imull %eax, %ecx // b.lo * a.hi |
18 | |
19 | movl 8(%esp), %edx // a.lo |
20 | movl 20(%esp), %ebx // b.hi |
21 | imull %edx, %ebx // a.lo * b.hi |
22 | |
23 | mull %edx // EDX:EAX = a.lo * b.lo |
24 | addl %ecx, %ebx // EBX = (a.lo*b.hi + a.hi*b.lo) |
25 | addl %ebx, %edx |
26 | |
27 | popl %ebx |
28 | retl |
29 | END_COMPILERRT_FUNCTION(__muldi3) |
30 | |
31 | #endif // __i386__ |
32 | |
33 | NO_EXEC_STACK_DIRECTIVE |
34 | |
35 | |