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Workaround broken __builtin_clz in clang with MS codegen (#519)

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This commit is contained in:
Victor Zverovich 2018-02-01 16:43:16 -08:00
parent 3dae25828f
commit 8fa9acb8e5
1 changed files with 9 additions and 5 deletions
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14
include/fmt/format.h
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@ -140,12 +140,16 @@
# endif
#endif
#if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
#endif
// __builtin_clz is broken in clang with Microsoft CodeGen:
// https://github.com/fmtlib/fmt/issues/519
#ifndef _MSC_VER
# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
# define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
# endif
#if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
# define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
# endif
#endif
// Some compilers masquerade as both MSVC and GCC-likes or otherwise support