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/*
Copyright 2022 Gabriel Jensen
This file is part of rgo.
rgo is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
rgo is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with rgo. If not, see <https://www.gnu.org/licenses/>.
*/
#include <rgo.h>
.global rgo_streq
rgo_streq:
#if defined(__x86_64__)
/*
rdi: char const * lstr
rsi: char const * rstr
*/
/* rdx: Address of the current input character. */
movq %rdi,%rdx
/* rcx: Address of the current output character. */
movq %rsi,%rcx
/* r8b: Current input character. */
/* r9b: Current output character. */
.loop:
movb (%rdx),%r8b
movb (%rcx),%r9b
cmpb %r8b,%r9b
jne .neq
testb %r8b,%r8b /* Check if we have reached the null-terminator. */
jz .eq
incq %rdx
incq %rcx
jmp .loop
.eq:
mov $0x1,%rax
ret
.neq:
mov $0x0,%rax
ret
#endif
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