31 lines
1.0 KiB
C
31 lines
1.0 KiB
C
/* clang-format off */
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/* ===-- bswapdi2.c - Implement __bswapdi2 ---------------------------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __bswapdi2 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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STATIC_YOINK("huge_compiler_rt_license");
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#include "third_party/compiler_rt/int_lib.h"
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COMPILER_RT_ABI uint64_t __bswapdi2(uint64_t u) {
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return (
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(((u)&0xff00000000000000ULL) >> 56) |
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(((u)&0x00ff000000000000ULL) >> 40) |
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(((u)&0x0000ff0000000000ULL) >> 24) |
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(((u)&0x000000ff00000000ULL) >> 8) |
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(((u)&0x00000000ff000000ULL) << 8) |
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(((u)&0x0000000000ff0000ULL) << 24) |
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(((u)&0x000000000000ff00ULL) << 40) |
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(((u)&0x00000000000000ffULL) << 56));
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}
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