1 | //===-- aeabi_uidivmod.S - EABI uidivmod implementation -------------------===// |
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #include "../assembly.h" |
10 | |
11 | // struct { unsigned quot, unsigned rem} |
12 | // __aeabi_uidivmod(unsigned numerator, unsigned denominator) { |
13 | // unsigned rem, quot; |
14 | // quot = __udivmodsi4(numerator, denominator, &rem); |
15 | // return {quot, rem}; |
16 | // } |
17 | |
18 | #if defined(__MINGW32__) |
19 | #define __aeabi_uidivmod __rt_udiv |
20 | #endif |
21 | |
22 | .syntax unified |
23 | .text |
24 | DEFINE_CODE_STATE |
25 | .p2align 2 |
26 | DEFINE_COMPILERRT_FUNCTION(__aeabi_uidivmod) |
27 | #if defined(USE_THUMB_1) |
28 | cmp r0, r1 |
29 | bcc LOCAL_LABEL(case_denom_larger) |
30 | push {r0, r1, lr} |
31 | bl SYMBOL_NAME(__aeabi_uidiv) |
32 | pop {r1, r2, r3} |
33 | muls r2, r0, r2 // r2 = quot * denom |
34 | subs r1, r1, r2 |
35 | JMP (r3) |
36 | LOCAL_LABEL(case_denom_larger): |
37 | movs r1, r0 |
38 | movs r0, #0 |
39 | JMP (lr) |
40 | #else // defined(USE_THUMB_1) |
41 | push { lr } |
42 | sub sp, sp, #4 |
43 | mov r2, sp |
44 | #if defined(__MINGW32__) |
45 | mov r3, r0 |
46 | mov r0, r1 |
47 | mov r1, r3 |
48 | #endif |
49 | bl SYMBOL_NAME(__udivmodsi4) |
50 | ldr r1, [sp] |
51 | add sp, sp, #4 |
52 | pop { pc } |
53 | #endif |
54 | END_COMPILERRT_FUNCTION(__aeabi_uidivmod) |
55 | |
56 | NO_EXEC_STACK_DIRECTIVE |
57 | |
58 | |