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etnaviv: switch to log2f(..)

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Drop our custom calculation of the logarithm base 2 and switch
to log2f(..).

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24364>
This commit is contained in:
Christian Gmeiner 2023-07-27 12:12:08 +02:00 • committed by Marge Bot
parent 04dbb556c2
commit 16915c7a71
1 changed files with 2 additions and 5 deletions
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7
src/gallium/drivers/etnaviv/etnaviv_util.h
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@ -43,9 +43,6 @@ etna_cfloat_to_uint8(float f)
return f * 256.0f;
}
/* 1/log10(2) */
#define RCPLOG2 (1.4426950408889634f)
/* float to fixp 5.5 */
static inline uint32_t
etna_float_to_fixp55(float f)
@ -76,14 +73,14 @@ etna_float_to_fixp88(float f)
static inline uint32_t
etna_log2_fixp55(unsigned width)
{
return etna_float_to_fixp55(logf((float)width) * RCPLOG2);
return etna_float_to_fixp55(log2f((float)width));
}
/* texture size to log2 in fixp 8.8 format */
static inline uint32_t
etna_log2_fixp88(unsigned width)
{
return etna_float_to_fixp88(logf((float)width) * RCPLOG2);
return etna_float_to_fixp88(log2f((float)width));
}
/* float to fixp 16.16 */