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SSE optimization for vector mismatch.

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Change-Id: I564b822033b59d86635230f29ed6197e306a2c4f
This commit is contained in:
Vincent Rabaud
2016-01-07 17:23:48 +01:00
parent 7db53831a9
commit 8ce975ac82
4 changed files with 78 additions and 19 deletions
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5
src/dsp/lossless.h
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@ -262,6 +262,11 @@ extern VP8LHistogramAddFunc VP8LHistogramAdd;
// -----------------------------------------------------------------------------
// PrefixEncode()
typedef int (*VP8LVectorMismatchFunc)(const uint32_t* const array1,
const uint32_t* const array2, int length);
// Returns the first index where array1 and array2 are different.
extern VP8LVectorMismatchFunc VP8LVectorMismatch;
static WEBP_INLINE int VP8LBitsLog2Ceiling(uint32_t n) {
const int log_floor = BitsLog2Floor(n);
if (n == (n & ~(n - 1))) // zero or a power of two.