80 lines
3.0 KiB
ArmAsm
80 lines
3.0 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 "libc/macros.h"
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/ @fileoverview Byte-order conversion functions.
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/
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/ Endianness is deceptively complicated to the uninitiated. Many
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/ helpers have been written by our top minds to address perceived
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/ difficulties. These ones got through standardization processes.
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/ To protect their legacy, all 19 functions have been implemented
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/ in just 17 bytes.
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/
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/ @asyncsignalsafe
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/ @see read32le(), read32be(), etc.
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bswap_64:
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htobe64:
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htole64:
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be64toh:
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le64toh:mov %rdi,%rax
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bswap %rax
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ret
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.endfn le64toh,globl
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.endfn be64toh,globl
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.endfn htole64,globl
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.endfn htobe64,globl
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.endfn bswap_64,globl
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bswap_32:
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htobe32:
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htole32:
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be32toh:
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le32toh:
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ntohl:
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htonl: mov %edi,%eax
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bswap %eax
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ret
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.endfn htonl,globl
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.endfn htole32,globl
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.endfn le32toh,globl
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.endfn be32toh,globl
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.endfn htobe32,globl
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.endfn ntohl,globl
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.endfn bswap_32,globl
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bswap_16:
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htobe16:
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htole16:
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be16toh:
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le16toh:
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ntohs:
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htons: movzwl %di,%eax
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xchg %al,%ah
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ret
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.endfn htobe16,globl
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.endfn htons,globl
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.endfn le16toh,globl
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.endfn be16toh,globl
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.endfn htole16,globl
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.endfn ntohs,globl
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.endfn bswap_16,globl
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.source __FILE__
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