diff options
Diffstat (limited to 'zap/source/amd64/mem/utf8enclen.S')
| -rw-r--r-- | zap/source/amd64/mem/utf8enclen.S | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/zap/source/amd64/mem/utf8enclen.S b/zap/source/amd64/mem/utf8enclen.S deleted file mode 100644 index 2e3b09f..0000000 --- a/zap/source/amd64/mem/utf8enclen.S +++ /dev/null @@ -1,67 +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_utf8enclen - -zap_utf8enclen: - # rdi: Address of the current character. - # rax: Length of the string. - # rsi: Current character. - - movq $0x0,%rax - - # Iterate over the input: -.loop: - - movl (%rdi),%esi - - # Test if we have reached the null-terminator: - testl %esi,%esi - jz .done - - cmpl $0xFFFF,%esi - jg .oct4 - - cmpl $0x7FF,%esi - jg .oct3 - - cmpl $0x7F,%esi - jg .oct2 - - # One octet: -.oct1: - - incq %rax - - jmp .cnt - - # Two octets: -.oct2: - - addq $0x2,%rax - - jmp .cnt - - # Three octets: -.oct3: - - addq $0x3,%rax - - jmp .cnt - - # Four octets: -.oct4: - - addq $0x4,%rax - - # Continue to the next codepoint: -.cnt: - - addq $0x4,%rdi - jmp .loop - - # Done: -.done: - - ret |