diff options
| author | Matt Turner <mattst88@gmail.com> | 2015-07-13 15:19:54 -0700 |
|---|---|---|
| committer | Matt Turner <mattst88@gmail.com> | 2015-07-29 09:34:51 -0700 |
| commit | c67ce2bd3b27a26d7f5665f296d307c0de39b720 (patch) | |
| tree | 2a459f65f529c5bf0dec86f51538fcfe20c0f015 | |
| parent | b73782bf184b7053026e8dda54800d48e64e20da (diff) | |
gallium/auxiliary: Use exp2(x) instead of pow(2.0, x).
| -rw-r--r-- | src/gallium/auxiliary/util/u_format_rgb9e5.h | 6 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.c | 2 |
2 files changed, 4 insertions, 4 deletions
diff --git a/src/gallium/auxiliary/util/u_format_rgb9e5.h b/src/gallium/auxiliary/util/u_format_rgb9e5.h index 973e542c53..1c12a668d8 100644 --- a/src/gallium/auxiliary/util/u_format_rgb9e5.h +++ b/src/gallium/auxiliary/util/u_format_rgb9e5.h @@ -115,8 +115,8 @@ static inline unsigned float3_to_rgb9e5(const float rgb[3]) exp_shared = MAX2(-RGB9E5_EXP_BIAS-1, rgb9e5_FloorLog2(maxrgb)) + 1 + RGB9E5_EXP_BIAS; assert(exp_shared <= RGB9E5_MAX_VALID_BIASED_EXP); assert(exp_shared >= 0); - /* This pow function could be replaced by a table. */ - denom = pow(2, exp_shared - RGB9E5_EXP_BIAS - RGB9E5_MANTISSA_BITS); + /* This exp2 function could be replaced by a table. */ + denom = exp2(exp_shared - RGB9E5_EXP_BIAS - RGB9E5_MANTISSA_BITS); maxm = (int) floor(maxrgb / denom + 0.5); if (maxm == MAX_RGB9E5_MANTISSA+1) { @@ -154,7 +154,7 @@ static inline void rgb9e5_to_float3(unsigned rgb, float retval[3]) v.raw = rgb; exponent = v.field.biasedexponent - RGB9E5_EXP_BIAS - RGB9E5_MANTISSA_BITS; - scale = (float) pow(2, exponent); + scale = exp2f(exponent); retval[0] = v.field.r * scale; retval[1] = v.field.g * scale; diff --git a/src/gallium/auxiliary/util/u_math.c b/src/gallium/auxiliary/util/u_math.c index ae9e9513b0..c58af911be 100644 --- a/src/gallium/auxiliary/util/u_math.c +++ b/src/gallium/auxiliary/util/u_math.c @@ -48,7 +48,7 @@ init_pow2_table(void) { int i; for (i = 0; i < POW2_TABLE_SIZE; i++) - pow2_table[i] = (float) pow(2.0, (i - POW2_TABLE_OFFSET) / POW2_TABLE_SCALE); + pow2_table[i] = exp2f((i - POW2_TABLE_OFFSET) / POW2_TABLE_SCALE); } |