1 | //===-- aeabi_idivmod.S - EABI idivmod 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 { int quot, int rem} __aeabi_idivmod(int numerator, int denominator) { |
12 | // int rem, quot; |
13 | // quot = __divmodsi4(numerator, denominator, &rem); |
14 | // return {quot, rem}; |
15 | // } |
16 | |
17 | #if defined(__MINGW32__) |
18 | #define __aeabi_idivmod __rt_sdiv |
19 | #endif |
20 | |
21 | .syntax unified |
22 | .text |
23 | DEFINE_CODE_STATE |
24 | .p2align 2 |
25 | DEFINE_COMPILERRT_FUNCTION(__aeabi_idivmod) |
26 | #if defined(USE_THUMB_1) |
27 | push {r0, r1, lr} |
28 | bl SYMBOL_NAME(__divsi3) |
29 | pop {r1, r2, r3} // now r0 = quot, r1 = num, r2 = denom |
30 | muls r2, r0, r2 // r2 = quot * denom |
31 | subs r1, r1, r2 |
32 | JMP (r3) |
33 | #else // defined(USE_THUMB_1) |
34 | push { lr } |
35 | sub sp, sp, #4 |
36 | mov r2, sp |
37 | #if defined(__MINGW32__) |
38 | mov r3, r0 |
39 | mov r0, r1 |
40 | mov r1, r3 |
41 | #endif |
42 | bl SYMBOL_NAME(__divmodsi4) |
43 | ldr r1, [sp] |
44 | add sp, sp, #4 |
45 | pop { pc } |
46 | #endif // defined(USE_THUMB_1) |
47 | END_COMPILERRT_FUNCTION(__aeabi_idivmod) |
48 | |
49 | NO_EXEC_STACK_DIRECTIVE |
50 | |
51 | |