llvm-project

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//===-- bswapdi2.c - Implement __bswapdi2 ---------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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#include "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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