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wine-mirror
GitHub Repository: wine-mirror/wine
 Path: blob/master/libs/compiler-rt/lib/builtins/arm/aeabi_uidivmod.S
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//===-- aeabi_uidivmod.S - EABI uidivmod implementation -------------------===//

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//

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//                     The LLVM Compiler Infrastructure

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//

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// This file is dual licensed under the MIT and the University of Illinois Open

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// Source Licenses. See LICENSE.TXT for details.

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//

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//===----------------------------------------------------------------------===//

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#include "../assembly.h"

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// struct { unsigned quot, unsigned rem}

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//        __aeabi_uidivmod(unsigned numerator, unsigned denominator) {

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//   unsigned rem, quot;

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//   quot = __udivmodsi4(numerator, denominator, &rem);

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//   return {quot, rem};

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// }

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#if defined(_WIN32)

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#define __aeabi_uidivmod __rt_udiv

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#endif

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        .syntax unified

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        .text

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        DEFINE_CODE_STATE

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        .p2align 2

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DEFINE_COMPILERRT_FUNCTION(__aeabi_uidivmod)

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#if defined(USE_THUMB_1)

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        cmp     r0, r1

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        bcc     LOCAL_LABEL(case_denom_larger)

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        push    {r0, r1, lr}

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        bl      SYMBOL_NAME(__aeabi_uidiv)

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        pop     {r1, r2, r3}

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        muls    r2, r0, r2 // r2 = quot * denom

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        subs    r1, r1, r2

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        JMP     (r3)

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LOCAL_LABEL(case_denom_larger):

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        movs    r1, r0

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        movs    r0, #0

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        JMP     (lr)

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#else // defined(USE_THUMB_1)

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        push    { lr }

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        sub     sp, sp, #4

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        mov     r2, sp

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#if defined(_WIN32)

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        mov     r3, r0

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        mov     r0, r1

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        mov     r1, r3

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#endif

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        bl      SYMBOL_NAME(__udivmodsi4)

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        ldr     r1, [sp]

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        add     sp, sp, #4

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        pop     { pc }

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#endif

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END_COMPILERRT_FUNCTION(__aeabi_uidivmod)

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NO_EXEC_STACK_DIRECTIVE

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