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Diffstat (limited to 'zap/src/mem/strcp.S')
| -rw-r--r-- | zap/src/mem/strcp.S | 53 |
1 files changed, 0 insertions, 53 deletions
diff --git a/zap/src/mem/strcp.S b/zap/src/mem/strcp.S deleted file mode 100644 index 04c3198..0000000 --- a/zap/src/mem/strcp.S +++ /dev/null @@ -1,53 +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 <zap/priv.h> - -.globl zap_strcp - -zap_strcp: - - /* - char const * in - char const * out - */ - -#if defined(__amd64__) - - # rax: Address of the current input character. - # rdi: Address of the first input character. - # rsi: Address of the current output character. - # rdx: Current character. - - movq %rdi,%rax - - # Iterate over the strings: -.loop: - - # Copy character: - movb (%rax),%dl # Move it into a register... - movb %dl,(%rsi) # ... and then back into memory. - - # Check if we have reached the null-terminator: - testb %dl,%dl - jz .done - - # Continue to the next character: - - incq %rax - incq %rsi - jmp .loop - - # Finish: -.done: - - # Get the length of the (input) string: - subq %rdi,%rax - decq %rax # We do not count the null-terminator in the string length. - - ret - -#endif |