diff options
Diffstat (limited to 'zap/src/streq.c')
-rw-r--r-- | zap/src/streq.c | 83 |
1 files changed, 0 insertions, 83 deletions
diff --git a/zap/src/streq.c b/zap/src/streq.c deleted file mode 100644 index 1ff4420..0000000 --- a/zap/src/streq.c +++ /dev/null @@ -1,83 +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> - -#include <zap/mem.h> - -#include <stdbool.h> -#include <stdint.h> - -#if zap_priv_fastimpl -__asm__ ( - ".globl zap_streq\n" - - "zap_streq:\n" - /* - char const * lstr - char const * rstr - */ -#if defined(sus_arch_amd64) - /* rax: Address of the current input character. */ - "movq %rdi,%rax\n" - /* rsi: Address of the current output character. */ - "movq %rsi,%rsi\n" - /* rdx: Current input character. */ - /* rcx: Current output character. */ - ".loop:\n" - "movb (%rax),%dl\n" /* Move the characters into registers. */ - "movb (%rsi),%cl\n" - "cmpb %dl,%cl\n" /* Check if the characters are equal... */ - "jne .neq\n" /* ... indicate inequality if they are not. */ - "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */ - "jz .eq\n" /* ... indicate equality if we have. */ - "incq %rax\n" /* Increment positions. */ - "incq %rsi\n" - "jmp .loop\n" /* Restart loop. */ - ".eq:\n" /* Indicate equality. */ - "movb $0x1,%al\n" - "ret\n" - ".neq:\n" /* Indicate inequality. */ - "movb $0x0,%al\n" - "ret\n" -#elif defined(sus_arch_ia32) - /* eax: Address of the current input character. */ - "movl 0x4(%esp),%eax\n" - /* ecx: Address of the current output character. */ - "movl 0x8(%esp),%ecx\n" - /* edx: Current input character. */ - /* edx: Current output character. */ - ".loop:\n" - "movb (%eax),%dl\n" /* Move the characters into registers. */ - "movb (%ecx),%dh\n" - "cmpb %dl,%dh\n" /* Check if the characters are equal... */ - "jne .neq\n" /* ... indicate inequality if they are not. */ - "testb %dl,%dl\n" /* Check if we have reached the null-terminator... */ - "jz .eq\n" /* ... indicate equality if we have. */ - "incl %eax\n" /* Increment positions. */ - "incl %ecx\n" - "jmp .loop\n" /* Restart loop. */ - ".eq:\n" /* Indicate equality. */ - "movb $0x1,%al\n" - "ret\n" - ".neq:\n" /* Indicate inequality. */ - "movb $0x0,%al\n" - "ret\n" -#endif -); -#else -bool zap_streq(char const * const _lstr,char const * const _rstr) { - char const * lpos = _lstr; - char const * rpos = _rstr; - for (;;++lpos,++rpos) { - char const lchr = *lpos; - char const rchr = *rpos; - sus_likely (lchr != rchr) {return false;} - if (lchr == '\x0') {return true;} - } - sus_unreach(); -} -#endif |