diff options
| author | Roland Scheidegger <[email protected]> | 2011-06-08 23:23:24 +0200 |
|---|---|---|
| committer | Roland Scheidegger <[email protected]> | 2011-06-09 01:14:50 +0200 |
| commit | b3d5822e932767a572f392ae2b3ca1dfee5f6b03 (patch) | |
| tree | 79cc975a4b647aca295f14ca5e336ef08fe556aa /src | |
| parent | 894db40f122175ed85e0d32d42296f2d56cf748e (diff) | |
util: add gcc version check for builtins
Looks like only next_power_of_two, logbase2 and bitcount use builtins
requiring gcc 3.4, so maybe everything else compiles with older gcc.
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 417f79f78ba..0b5284428eb 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -477,7 +477,7 @@ float_to_byte_tex(float f) static INLINE unsigned util_logbase2(unsigned n) { -#if defined(PIPE_CC_GCC) +#if defined(PIPE_CC_GCC) && (PIPE_CC_GCC_VERSION >= 304) return ((sizeof(unsigned) * 8 - 1) - __builtin_clz(n | 1)); #else unsigned pos = 0; @@ -497,7 +497,7 @@ util_logbase2(unsigned n) static INLINE unsigned util_next_power_of_two(unsigned x) { -#if defined(PIPE_CC_GCC) +#if defined(PIPE_CC_GCC) && (PIPE_CC_GCC_VERSION >= 304) if (x <= 1) return 1; @@ -529,7 +529,7 @@ util_next_power_of_two(unsigned x) static INLINE unsigned util_bitcount(unsigned n) { -#if defined(PIPE_CC_GCC) +#if defined(PIPE_CC_GCC) && (PIPE_CC_GCC_VERSION >= 304) return __builtin_popcount(n); #else /* K&R classic bitcount. |