diff options
author | Mathias Fröhlich <mathias.froehlich@web.de> | 2016-08-02 08:46:04 +0200 |
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committer | Mathias Fröhlich <Mathias.Froehlich@gmx.net> | 2016-08-09 21:20:46 +0200 |
commit | 027cbf00f248bda325521db8f56a3718898da46b (patch) | |
tree | 5e5cce2c268223053e4504f921c5143277f51b3c /src/gallium/auxiliary | |
parent | e4cb3af524cb02ec7cd23a64da033cfb7193a3cb (diff) |
util: Move _mesa_fsl/util_last_bit into util/bitscan.h
As requested with the initial creation of util/bitscan.h
now move other bitscan related functions into util.
v2: Split into two patches.
Signed-off-by: Mathias Fröhlich <Mathias.Froehlich@web.de>
Tested-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Diffstat (limited to 'src/gallium/auxiliary')
-rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 64 |
1 files changed, 0 insertions, 64 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 1661e63dbdd..a9232711bf1 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -347,70 +347,6 @@ util_half_inf_sign(int16_t x) /** - * Find last bit set in a word. The least significant bit is 1. - * Return 0 if no bits are set. - */ -static inline unsigned -util_last_bit(unsigned u) -{ -#if defined(HAVE___BUILTIN_CLZ) - return u == 0 ? 0 : 32 - __builtin_clz(u); -#else - unsigned r = 0; - while (u) { - r++; - u >>= 1; - } - return r; -#endif -} - -/** - * Find last bit set in a word. The least significant bit is 1. - * Return 0 if no bits are set. - */ -static inline unsigned -util_last_bit64(uint64_t u) -{ -#if defined(HAVE___BUILTIN_CLZLL) - return u == 0 ? 0 : 64 - __builtin_clzll(u); -#else - unsigned r = 0; - while (u) { - r++; - u >>= 1; - } - return r; -#endif -} - -/** - * Find last bit in a word that does not match the sign bit. The least - * significant bit is 1. - * Return 0 if no bits are set. - */ -static inline unsigned -util_last_bit_signed(int i) -{ - if (i >= 0) - return util_last_bit(i); - else - return util_last_bit(~(unsigned)i); -} - -/* Returns a bitfield in which the first count bits starting at start are - * set. - */ -static inline unsigned -u_bit_consecutive(unsigned start, unsigned count) -{ - assert(start + count <= 32); - if (count == 32) - return ~0; - return ((1u << count) - 1) << start; -} - -/** * Return float bits. */ static inline unsigned |