| 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 | PACBTI_LANDING |
| 35 | #if defined(__ARM_FEATURE_PAC_DEFAULT) |
| 36 | push { r12, lr } |
| 37 | #else |
| 38 | push { lr } |
| 39 | #endif |
| 40 | sub sp, sp, #4 |
| 41 | mov r2, sp |
| 42 | #if defined(__MINGW32__) |
| 43 | mov r3, r0 |
| 44 | mov r0, r1 |
| 45 | mov r1, r3 |
| 46 | #endif |
| 47 | bl SYMBOL_NAME(__divmodsi4) |
| 48 | ldr r1, [sp] |
| 49 | add sp, sp, #4 |
| 50 | #if defined(__ARM_FEATURE_PAC_DEFAULT) |
| 51 | pop { r12, lr } |
| 52 | bxaut r12, lr, sp |
| 53 | #else |
| 54 | pop { pc } |
| 55 | #endif |
| 56 | #endif // defined(USE_THUMB_1) |
| 57 | END_COMPILERRT_FUNCTION(__aeabi_idivmod) |
| 58 | |
| 59 | NO_EXEC_STACK_DIRECTIVE |
| 60 | |
| 61 |