diff options
Diffstat (limited to 'string.asm')
| -rw-r--r-- | string.asm | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/string.asm b/string.asm new file mode 100644 index 0000000..4bf67d7 --- /dev/null +++ b/string.asm @@ -0,0 +1,40 @@ +# Copyright (C) 2026 Sebastian G. Kirmayer <gloria@gloria-mundi.eu> +# +# This file is part of sysf-i386. +# +# sysf-i386 is free software: you can redistribute it and/or modify it under +# the terms of the GNU General Public License as published by the Free +# Software Foundation, either version 3 of the License, or (at your option) +# any later version. +# +# sysf-i386 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 General Public License for more +# details. +# +# You should have received a copy of the GNU General Public License along +# with sysf-i386. If not, see <https://www.gnu.org/licenses/>. +# + +text +label strnul + movl %edi %edx + movl %eax %edi + xorl %eax %eax + movl -1 %ecx + repnz scasb + leal @%edi+-1 %eax + ret + +label streq + subl %eax %ecx + subl %edx @%esp+4 + cmpl %ecx @%esp+4 + jne end. + xchgl %eax %esi + xchgl %edx %edi + repz cmpsb + movl %eax %esi + movl %edx %edi +L end + ret 4 |