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/*
* Copyright 2022 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* When the 'M' extension is disabled, compiler can not recognize div/mul
* instructions. So mul/div instructions in the below integer arithmetic
* routines are hard coded by opcodes.
*
* IMPORTANT:
* The workaround requires the nop instruction, please don't optimize it.
*/
.macro __int_arithmetic func opcode
.section .ram_code_ilm0
.align 2
.globl \func
.type \func, @function
\func:
.word \opcode
nop
ret
.size \func, .-\func
.endm
/* signed 32 bit multiplication. opcode of mul a0,a0,a1 is 0x02b50533 */
__int_arithmetic __mulsi3 0x02b50533
/* signed 32 bit division. opcode of div a0,a0,a1 is 0x02b54533 */
__int_arithmetic __divsi3 0x02b54533
/* unsigned 32 bit division. opcode of divu a0,a0,a1 is 0x02b55533 */
__int_arithmetic __udivsi3 0x02b55533
/*
* This function return the remainder of the signed division.
* opcode of rem a0,a0,a1 is 0x02b56533
*/
__int_arithmetic __modsi3 0x02b56533
/*
* This function return the remainder of the unsigned division.
* opcode of remu a0,a0,a1 is 0x02b57533
*/
__int_arithmetic __umodsi3 0x02b57533
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