diff options
Diffstat (limited to 'zap/src/mem/fndbyte.S')
-rw-r--r-- | zap/src/mem/fndbyte.S | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/zap/src/mem/fndbyte.S b/zap/src/mem/fndbyte.S deleted file mode 100644 index 4413b42..0000000 --- a/zap/src/mem/fndbyte.S +++ /dev/null @@ -1,59 +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_fndbyte - -zap_fndbyte: - - /* - void const * ptr - zap_sz num - unsigned char byte - */ - -#if defined(__amd64__) - - # rax: Address of the current element. - # rdi: Address of the first element. - # rsi: Address of the element after the last element. - # rdx: Byte value. - # rcx: Current byte. - - movq %rdi,%rax - - addq %rdi,%rsi - - # Iterate over the array: -.loop: - - # Check if we have reached the end of the array: - cmpq %rax,%rsi - je .nfnd - - # Check if we have found the byte value: - movb (%rax),%cl - cmpb %cl,%dl - je .fnd - - # Continue to the next byte: - incq %rax - jmp .loop - - # Found: -.fnd: - - subq %rdi,%rax - ret - - # Not found: -.nfnd: - - movq $0xFFFFFFFFFFFFFFFF,%rax - ret - -#endif |