pico__int64__ops__aeabi_8S_source.html

/*

 * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.

 *

 * SPDX-License-Identifier: BSD-3-Clause

 */


.syntax unified

.cpu cortex-m0plus

.thumb


#include "asm_helper.S"


.macro int64_section name

#if PICO_INT64_OPS_IN_RAM

.section RAM_SECTION_NAME(\name), "ax"

#else

.section SECTION_NAME(\name), "ax"

#endif

.endm


int64_section __aeabi_lmul


wrapper_func __aeabi_lmul

    muls   r1, r2

    muls   r3, r0

    adds   r1, r3

    mov    r12, r1

    lsrs   r1, r2, #16

    uxth   r3, r0

    muls   r3, r1

    push   {r4}

    lsrs   r4, r0, #16

    muls   r1, r4

    uxth   r2, r2

    uxth   r0, r0

    muls   r0, r2

    muls   r2, r4

    lsls   r4, r3, #16

    lsrs   r3, #16

    adds   r0, r4

    pop    {r4}

    adcs   r1, r3

    lsls   r3, r2, #16

    lsrs   r2, #16

    adds   r0, r3

    adcs   r1, r2

    add    r1, r12

    bx lr