diff options
Diffstat (limited to 'zap/source/amd64/mem/strlen.S')
| -rw-r--r-- | zap/source/amd64/mem/strlen.S | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/zap/source/amd64/mem/strlen.S b/zap/source/amd64/mem/strlen.S deleted file mode 100644 index a3f68b1..0000000 --- a/zap/source/amd64/mem/strlen.S +++ /dev/null @@ -1,37 +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/. - -.globl zap_strlen - -zap_strlen: -# Address of the current character: -#define addr %rax -# Address of the first character: -#define start %rdi -# Current character: -#define chr %dl - - movq start,addr - - # Iterate over the string: -.loop: - - # Move the character into a register: - movb (addr),chr # chr = *addr - - # Check if we have reached the null-terminator: - testb chr,chr # if (chr == 0x0) - jz .done # goto done - - # Continue to the next character: - incq addr # ++addr - jmp .loop # goto loop - - # Done: -.done: - - # Get the length: - subq start,addr # addr -= start - - ret # return addr |