diff options
Diffstat (limited to 'rgo/src/strlen.S')
-rw-r--r-- | rgo/src/strlen.S | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/rgo/src/strlen.S b/rgo/src/strlen.S deleted file mode 100644 index 19cb806..0000000 --- a/rgo/src/strlen.S +++ /dev/null @@ -1,43 +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_strlen - -rgo_strlen: - /* - char const * str - */ -#if defined(__i386__) - /* eax: Address of the current character. */ - movl 0x4(%esp),%eax - /* ecx: Address of the first character. */ - movl %eax,%ecx - /* edx: Current character. */ -.loop: - movb (%eax),%dl - testb %dl,%dl - jz .done /* Exit loop if we have reached the null-terminator. */ - incl %eax /* Continue to the next character. */ - jmp .loop -.done: - subl %ecx,%eax - ret -#elif defined(__x86_64__) - /* rax: Address of the current character. */ - movq %rdi,%rax - /* rdx: Current character. */ -.loop: - movb (%rax),%dl - testb %dl,%dl - jz .done /* Exit loop if we have reached the null-terminator. */ - incq %rax /* Continue to the next character. */ - jmp .loop -.done: - subq %rdi,%rax - ret -#endif |