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make HistogramAdd() a pointer in dsp

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* merged the two HistogramAdd/AddEval() into a single call
  (with detection of special case when b==out)
* added a SSE2 variant
* harmonize the histogram type to 'uint32_t' instead
  of just 'int'. This has a lot of ripples on signatures.
* 1-2% faster

Change-Id: I10299ff300f36cdbca5a560df1ae4d4df149d306
This commit is contained in:
Pascal Massimino
2014-04-28 02:11:46 -07:00
committed by skal
parent c8bbb636ea
commit b3a616b356
10 changed files with 230 additions and 124 deletions
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84
src/dsp/lossless_sse2.c
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@ -383,6 +383,88 @@ static void ConvertBGRAToBGR(const uint32_t* src,
VP8LConvertBGRAToBGR_C((const uint32_t*)in, num_pixels, dst);
}
//------------------------------------------------------------------------------
#define LINE_SIZE 16 // 8 or 16
static void AddVector(const uint32_t* a, const uint32_t* b, uint32_t* out,
int size) {
int i;
assert(size % LINE_SIZE == 0);
for (i = 0; i < size; i += LINE_SIZE) {
const __m128i a0 = _mm_loadu_si128((__m128i*)&a[i + 0]);
const __m128i a1 = _mm_loadu_si128((__m128i*)&a[i + 4]);
#if (LINE_SIZE == 16)
const __m128i a2 = _mm_loadu_si128((__m128i*)&a[i + 8]);
const __m128i a3 = _mm_loadu_si128((__m128i*)&a[i + 12]);
#endif
const __m128i b0 = _mm_loadu_si128((__m128i*)&b[i + 0]);
const __m128i b1 = _mm_loadu_si128((__m128i*)&b[i + 4]);
#if (LINE_SIZE == 16)
const __m128i b2 = _mm_loadu_si128((__m128i*)&b[i + 8]);
const __m128i b3 = _mm_loadu_si128((__m128i*)&b[i + 12]);
#endif
_mm_storeu_si128((__m128i*)&out[i + 0], _mm_add_epi32(a0, b0));
_mm_storeu_si128((__m128i*)&out[i + 4], _mm_add_epi32(a1, b1));
#if (LINE_SIZE == 16)
_mm_storeu_si128((__m128i*)&out[i + 8], _mm_add_epi32(a2, b2));
_mm_storeu_si128((__m128i*)&out[i + 12], _mm_add_epi32(a3, b3));
#endif
}
}
static void AddVectorEq(const uint32_t* a, uint32_t* out, int size) {
int i;
assert(size % LINE_SIZE == 0);
for (i = 0; i < size; i += LINE_SIZE) {
const __m128i a0 = _mm_loadu_si128((__m128i*)&a[i + 0]);
const __m128i a1 = _mm_loadu_si128((__m128i*)&a[i + 4]);
#if (LINE_SIZE == 16)
const __m128i a2 = _mm_loadu_si128((__m128i*)&a[i + 8]);
const __m128i a3 = _mm_loadu_si128((__m128i*)&a[i + 12]);
#endif
const __m128i b0 = _mm_loadu_si128((__m128i*)&out[i + 0]);
const __m128i b1 = _mm_loadu_si128((__m128i*)&out[i + 4]);
#if (LINE_SIZE == 16)
const __m128i b2 = _mm_loadu_si128((__m128i*)&out[i + 8]);
const __m128i b3 = _mm_loadu_si128((__m128i*)&out[i + 12]);
#endif
_mm_storeu_si128((__m128i*)&out[i + 0], _mm_add_epi32(a0, b0));
_mm_storeu_si128((__m128i*)&out[i + 4], _mm_add_epi32(a1, b1));
#if (LINE_SIZE == 16)
_mm_storeu_si128((__m128i*)&out[i + 8], _mm_add_epi32(a2, b2));
_mm_storeu_si128((__m128i*)&out[i + 12], _mm_add_epi32(a3, b3));
#endif
}
}
#undef LINE_SIZE
// Note we are adding uint32_t's as *signed* int32's (using _mm_add_epi32). But
// that's ok since the histogram values are less than 1<<28 (max picture size).
static void HistogramAdd(const VP8LHistogram* const a,
const VP8LHistogram* const b,
VP8LHistogram* const out) {
int i;
const int literal_size = VP8LHistogramNumCodes(a->palette_code_bits_);
assert(a->palette_code_bits_ == b->palette_code_bits_);
if (b != out) {
AddVector(a->literal_, b->literal_, out->literal_, NUM_LITERAL_CODES);
AddVector(a->red_, b->red_, out->red_, NUM_LITERAL_CODES);
AddVector(a->blue_, b->blue_, out->blue_, NUM_LITERAL_CODES);
AddVector(a->alpha_, b->alpha_, out->alpha_, NUM_LITERAL_CODES);
} else {
AddVectorEq(a->literal_, out->literal_, NUM_LITERAL_CODES);
AddVectorEq(a->red_, out->red_, NUM_LITERAL_CODES);
AddVectorEq(a->blue_, out->blue_, NUM_LITERAL_CODES);
AddVectorEq(a->alpha_, out->alpha_, NUM_LITERAL_CODES);
}
for (i = NUM_LITERAL_CODES; i < literal_size; ++i) {
out->literal_[i] = a->literal_[i] + b->literal_[i];
}
for (i = 0; i < NUM_DISTANCE_CODES; ++i) {
out->distance_[i] = a->distance_[i] + b->distance_[i];
}
}
#endif // WEBP_USE_SSE2
//------------------------------------------------------------------------------
@ -405,6 +487,8 @@ void VP8LDspInitSSE2(void) {
VP8LConvertBGRAToRGBA4444 = ConvertBGRAToRGBA4444;
VP8LConvertBGRAToRGB565 = ConvertBGRAToRGB565;
VP8LConvertBGRAToBGR = ConvertBGRAToBGR;
VP8LHistogramAdd = HistogramAdd;
#endif // WEBP_USE_SSE2
}