diff options
| author | Matt Turner <[email protected]> | 2014-09-21 17:25:49 -0700 |
|---|---|---|
| committer | Matt Turner <[email protected]> | 2014-09-25 13:52:55 -0700 |
| commit | 4a96df73e770bcca6396d3c8ffe3fd1693c73e50 (patch) | |
| tree | 6f0d990309a36c1b62b091fd17c0dd93645c186d /configure.ac | |
| parent | 3e0082261959762460dde18553ce0615df5c7a0a (diff) | |
mesa: Replace a priori knowledge of gcc builtins with configure tests.
Presumbly this will let clang and other compilers use the built-ins as
well.
Notice two changes specifically:
- in _mesa_next_pow_two_64(), always use __builtin_clzll and add a
static assertion that this is safe.
- in macros.h, remove the clang-specific definition since it should
be able to detect __builtin_unreachable in configure.
Reviewed-by: Jason Ekstrand <[email protected]> [C bits]
Reviewed-by: Ian Romanick <[email protected]>
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index bad152800c7..db134a2f35b 100644 --- a/configure.ac +++ b/configure.ac @@ -130,6 +130,15 @@ fi dnl Check for compiler builtins AX_GCC_BUILTIN([__builtin_bswap32]) AX_GCC_BUILTIN([__builtin_bswap64]) +AX_GCC_BUILTIN([__builtin_clz]) +AX_GCC_BUILTIN([__builtin_clzll]) +AX_GCC_BUILTIN([__builtin_ctz]) +AX_GCC_BUILTIN([__builtin_expect]) +AX_GCC_BUILTIN([__builtin_ffs]) +AX_GCC_BUILTIN([__builtin_ffsll]) +AX_GCC_BUILTIN([__builtin_popcount]) +AX_GCC_BUILTIN([__builtin_popcountll]) +AX_GCC_BUILTIN([__builtin_unreachable]) AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes) |