2020-06-16 13:38:43 +00:00
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/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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2020-06-15 14:18:57 +00:00
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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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2020-12-28 01:18:44 +00:00
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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2020-06-15 14:18:57 +00:00
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│ │
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2020-12-28 01:18:44 +00:00
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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2020-06-15 14:18:57 +00:00
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╚─────────────────────────────────────────────────────────────────────────────*/
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2021-03-01 07:42:35 +00:00
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#include "libc/macros.internal.h"
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2020-06-15 14:18:57 +00:00
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2021-02-08 17:19:00 +00:00
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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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// @see READ32LE(), READ32BE(), etc.
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// @asyncsignalsafe
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2020-06-15 14:18:57 +00:00
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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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2022-07-22 03:53:30 +00:00
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ntohl:
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2020-06-15 14:18:57 +00:00
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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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2022-07-22 03:53:30 +00:00
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ntohs:
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2020-06-15 14:18:57 +00:00
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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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