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/* SPDX-License-Identifier: GPL-2.0-only */
#include <linux/linkage.h>
#include <asm/asm.h>
#include <asm-generic/export.h>
/* int strncmp(const char *cs, const char *ct, size_t count) */
SYM_FUNC_START(strncmp)
/*
* Returns
* a0 - comparison result, value like strncmp
*
* Parameters
* a0 - string1
* a1 - string2
* a2 - number of characters to compare
*
* Clobbers
* t0, t1, t2
*/
li t2, 0
1:
beq a2, t2, 2f
lbu t0, 0(a0)
lbu t1, 0(a1)
addi a0, a0, 1
addi a1, a1, 1
bne t0, t1, 3f
addi t2, t2, 1
bnez t0, 1b
2:
li a0, 0
ret
3:
/*
* strncmp only needs to return (< 0, 0, > 0) values
* not necessarily -1, 0, +1
*/
sub a0, t0, t1
ret
SYM_FUNC_END(strncmp)
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