diff options
Diffstat (limited to 'rgo/src/fndchr.S')
| -rw-r--r-- | rgo/src/fndchr.S | 54 |
1 files changed, 0 insertions, 54 deletions
diff --git a/rgo/src/fndchr.S b/rgo/src/fndchr.S deleted file mode 100644 index 608916b..0000000 --- a/rgo/src/fndchr.S +++ /dev/null @@ -1,54 +0,0 @@ -/* - Copyright 2022 Gabriel Jensen. - This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. - If a copy of the MPL was not distributed with this file, You can obtain one at https://mozilla.org/MPL/2.0/. -*/ - -#include <rgo.h> - -.global rgo_fndchr - -rgo_fndchr: - /* - char const * str - char chr - */ -#if defined(__i386__) - /* eax: Address of the current character. */ - movl 0x4(%esp),%eax - /* ecx: Character. */ - movb 0x8(%esp),%cl - /* edx: Current character. */ -.loop: - movb (%eax),%dl - cmpb %dl,%cl - je .fnd /* Exit loop if we have found the character. */ - testb %dl,%dl - je .nfnd /* We encountered the null-terminator but not the specified character. */ - incl %eax - jmp .loop -.fnd: - subl 0x4(%esp),%eax - ret -.nfnd: - movl $0xFFFFFFFF,%eax - ret -#elif defined(__x86_64__) - /* rax: Address of the current character. */ - movq %rdi,%rax - /* rdx: Current character. */ -.loop: - movb (%rax),%dl - cmpb %dl,%sil - je .fnd /* Exit loop if we have found the character. */ - testb %dl,%dl - je .nfnd /* We encountered the null-terminator but not the specified character. */ - incq %rax - jmp .loop -.fnd: - subq %rdi,%rax - ret -.nfnd: - movq $0xFFFFFFFFFFFFFFFF,%rax - ret -#endif |