mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
23d333c090
This change includes many bug fixes, for the NT polyfills, strings, memory, boot, and math libraries which were discovered by adding more tools for recreational programming, such as PC emulation. Lemon has also been vendored because it works so well at parsing languages.
133 lines
3.9 KiB
ArmAsm
133 lines
3.9 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/relocations.h"
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#include "libc/macros.h"
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/ Escapes byte for string literal.
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/
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/ This turns stuff like (char)0xFF into \0377. The returned
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/ string is word-encoded, e.g. '\\'|'0'<<010|'3'<<020|etc.
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/
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/ @see libc/nexgen32e/cescapec.c
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cescapec:
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lea -7(%rdi),%ecx
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cmp $85,%cl
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ja 1f
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mov $'\\,%eax
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movzbl %cl,%ecx
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jmp *cescapectab(,%rcx,8)
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.Lanchorpoint:
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.LBEL: mov $'a,%ah
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ret
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.LBS: mov $'b,%ah
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ret
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.LHT: mov $'t,%ah
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ret
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.LLF: mov $'n,%ah
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ret
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.LVT: mov $'v,%ah
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ret
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.LFF: mov $'f,%ah
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ret
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.LCR: mov $'r,%ah
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ret
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.LDQ: mov $'\",%ah
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ret
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.LSQ: mov $'\',%ah
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ret
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.LBSL: mov $'\\,%ah
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ret
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#ifdef __STRICT_ANSI__
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.LQM: mov $'?,%ah
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ret
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.LESC:
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#elif defined(__GNUC__)
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.LESC: mov $'e,%ah
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ret
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.LQM:
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#endif
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1: movzbl %dil,%eax
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cmp $127,%eax
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ja 2f
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ezlea kCtype,cx
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testb $16,(%rcx,%rax)
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jne 3f
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2: and $-64,%eax
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mov %edi,%ecx
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and $56,%ecx
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shl $13,%ecx
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and $7,%edi
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shl $24,%edi
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or %ecx,%edi
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lea (%rdi,%rax,4),%eax
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add $'0<<030|'0<<020|'0<<010|'\\,%eax
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3: ret
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.endfn cescapec,globl
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.initro 300,_init_cescapec
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cescapectab.ro:
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.byte 1,.LBEL-.Lanchorpoint
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.byte 1,.LBS-.Lanchorpoint
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.byte 1,.LHT-.Lanchorpoint
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.byte 1,.LLF-.Lanchorpoint
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.byte 1,.LVT-.Lanchorpoint
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.byte 1,.LFF-.Lanchorpoint
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.byte 1,.LCR-.Lanchorpoint
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.byte 0x1b-'\r-1,1b-.Lanchorpoint
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.byte 1,.LESC-.Lanchorpoint
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.byte '\"-0x1b-1,1b-.Lanchorpoint
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.byte 1,.LDQ-.Lanchorpoint
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.byte '\'-'\"-1,1b-.Lanchorpoint
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.byte 1,.LSQ-.Lanchorpoint
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.byte '?-'\'-1,1b-.Lanchorpoint
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.byte 1,.LQM-.Lanchorpoint
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.byte '\\-'?-1,1b-.Lanchorpoint
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.byte 1,.LBSL-.Lanchorpoint
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.equ .Lcescapectab.ro.size,.-cescapectab.ro
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.org 8 - .Lcescapectab.ro.size % 8 + .
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.endobj cescapectab.ro,globl,hidden
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.previous
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.initbss 300,_init_cescapec
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cescapectab:
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.rept '\\-7+1
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.quad 0
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.endr
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.endobj cescapectab
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.previous
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.init.start 300,_init_cescapec
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ezlea .Lanchorpoint,dx
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mov $.Lcescapectab.ro.size/2,%ch
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0: xor %eax,%eax
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lodsb
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mov %al,%cl
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lodsb
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add %rdx,%rax
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1: stosq
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dec %cl
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jnz 1b
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dec %ch
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jnz 0b
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.if .Lcescapectab.ro.size % 8
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add $(8-.Lcescapectab.ro.size%8),%rsi
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.endif
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.init.end 300,_init_cescapec
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.source __FILE__
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