8779ea7aed
Summary: In FreeBSD we needed to add generic implementations for `__bswapdi2` and `__bswapsi2`, since gcc 6.x for mips is emitting calls to these. See: https://reviews.freebsd.org/D10838 and https://reviews.freebsd.org/rS318601 The actual mips code generated for these generic C versions is pretty OK, as can be seen in the (FreeBSD) review. I checked over gcc sources, and it seems that it can emit these calls on more architectures, so maybe it's best to simply always add them to the compiler-rt builtins library. Reviewers: howard.hinnant, compnerd, petarj, emaste Reviewed By: compnerd, emaste Subscribers: mgorny, llvm-commits, arichardson Differential Revision: https://reviews.llvm.org/D33516 llvm-svn: 303866
28 lines
940 B
C
28 lines
940 B
C
/* ===-- 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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#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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