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disable GradientUnfilter_NEON

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Compile with XCode, it appears quite slower than the C-version,
especially for arm64.

Change-Id: Ic46dba184a36be454fef674129d2f909003788fc
(cherry picked from commit 4f3e3bbd44)
This commit is contained in:
Pascal Massimino 2017-01-25 16:33:26 -08:00 committed by James Zern
parent 0d8e05880c
commit f4dc56fd77
1 changed files with 10 additions and 0 deletions
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10
src/dsp/filters_neon.c
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@ -248,6 +248,12 @@ static void VerticalUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
}
}
// GradientUnfilter_NEON is correct but slower than the C-version,
// at least on ARM64. For armv7, it's a wash.
// So best is to disable it for now, but keep the idea around...
// #define USE_GRADIENT_UNFILTER
#if defined(USE_GRADIENT_UNFILTER)
#define GRAD_PROCESS_LANE(L) do { \
const uint8x8_t tmp1 = ROTATE_RIGHT_N(pred, 1); /* rotate predictor in */ \
const int16x8_t tmp2 = vaddq_s16(BC, U8_TO_S16(tmp1)); \
@ -295,6 +301,8 @@ static void GradientUnfilter_NEON(const uint8_t* prev, const uint8_t* in,
}
}
#endif // USE_GRADIENT_UNFILTER
//------------------------------------------------------------------------------
// Entry point
@ -303,7 +311,9 @@ extern void VP8FiltersInitNEON(void);
WEBP_TSAN_IGNORE_FUNCTION void VP8FiltersInitNEON(void) {
WebPUnfilters[WEBP_FILTER_HORIZONTAL] = HorizontalUnfilter_NEON;
WebPUnfilters[WEBP_FILTER_VERTICAL] = VerticalUnfilter_NEON;
#if defined(USE_GRADIENT_UNFILTER)
WebPUnfilters[WEBP_FILTER_GRADIENT] = GradientUnfilter_NEON;
#endif
WebPFilters[WEBP_FILTER_HORIZONTAL] = HorizontalFilter_NEON;
WebPFilters[WEBP_FILTER_VERTICAL] = VerticalFilter_NEON;