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Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
[FreeBSD/FreeBSD.git] / contrib / compiler-rt / lib / builtins / arm / aeabi_idivmod.S
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