| /* |
| * Copyright (c) 2022 ITE Corporation. |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * 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 .text |
| .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 |
