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dec/dsp_sse2: fix visual studio compile
This addresses issue #80 Change-Id: Ia81ae21f85266dd64d39da63ff2fae33f9a572dc
This commit is contained in:
Somnath Banerjee
James Zern
parent
00d9d6807c
commit
131a4b7b7b
@ -207,75 +207,86 @@ static void TransformSSE2(const int16_t* in, uint8_t* dst) {
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}
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//-----------------------------------------------------------------------------
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// Simple In-loop filtering (Paragraph 15.2)
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// Loop Filter (Paragraph 15)
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static inline void SignedShift3(__m128i* a) {
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__m128i t1 = *a;
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// Shift the lower byte of 16 bit by 3 while preserving the sign bit
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t1 = _mm_slli_epi16(t1, 8);
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t1 = _mm_srai_epi16(t1, 3);
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t1 = _mm_srli_epi16(t1, 8);
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// Compute abs(p - q) = subs(p - q) OR subs(q - p)
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#define MM_ABS(p, q) _mm_or_si128( \
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_mm_subs_epu8(*(q), *(p)), \
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_mm_subs_epu8(*(p), *(q)))
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// Shift the upper byte of 16 bit by 3 while preserving the sign bit
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*a = _mm_srai_epi16(*a, 11);
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*a = _mm_slli_epi16(*a, 8);
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*a = _mm_or_si128(t1, *a); // put the two together
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// Shift each byte of "a" by N bits while preserving by the sign bit.
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//
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// It first shifts the lower bytes of the words and then the upper bytes and
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// then merges the results together.
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#define SIGNED_SHIFT_N(a, N) { \
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__m128i t = a; \
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t = _mm_slli_epi16(t, 8); \
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t = _mm_srai_epi16(t, N); \
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t = _mm_srli_epi16(t, 8); \
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\
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a = _mm_srai_epi16(a, N + 8); \
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a = _mm_slli_epi16(a, 8); \
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\
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a = _mm_or_si128(t, a); \
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}
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// 4 columns in, 2 columns out
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static void DoFilter2SSE2(__m128i p1, __m128i p0, __m128i q0, __m128i q1,
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int thresh, __m128i* op, __m128i* oq) {
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__m128i t1, t2, t3;
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__m128i mask = _mm_setzero_si128();
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const __m128i one = _mm_set1_epi8(1);
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const __m128i four = _mm_set1_epi8(4);
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const __m128i lsb_mask = _mm_set1_epi8(0xFE);
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const __m128i sign_bit = _mm_set1_epi8(0x80);
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static void NeedsFilter(const __m128i* p1, const __m128i* p0, const __m128i* q0,
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const __m128i* q1, int thresh, __m128i *mask) {
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__m128i t1, t2;
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// Calculate mask
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t3 = _mm_subs_epu8(q1, p1); // (q1 - p1)
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t1 = _mm_subs_epu8(p1, q1); // (p1 - q1)
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t1 = _mm_or_si128(t1, t3); // abs(p1 - q1)
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t1 = _mm_and_si128(t1, lsb_mask); // set lsb of each byte to zero
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t1 = MM_ABS(p1, q1); // abs(p1 - q1)
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t2 = _mm_set1_epi8(0xFE);
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t1 = _mm_and_si128(t1, t2); // set lsb of each byte to zero
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t1 = _mm_srli_epi16(t1, 1); // abs(p1 - q1) / 2
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t3 = _mm_subs_epu8(p0, q0); // (p0 - q0)
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t2 = _mm_subs_epu8(q0, p0); // (q0 - p0)
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t2 = _mm_or_si128(t2, t3); // abs(p0 - q0)
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t2 = MM_ABS(p0, q0);
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t2 = _mm_adds_epu8(t2, t2); // abs(p0 - q0) * 2
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t2 = _mm_adds_epu8(t2, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2
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t3 = _mm_set1_epi8(thresh);
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t2 = _mm_subs_epu8(t2, t3); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > thresh
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mask = _mm_cmpeq_epi8(t2, mask);
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t1 = _mm_set1_epi8(thresh);
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t2 = _mm_subs_epu8(t2, t1); // abs(p0 - q0) * 2 + abs(p1 - q1) / 2 > thresh
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*mask = _mm_cmpeq_epi8(t2, _mm_setzero_si128());
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}
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// Start work on filters
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p1 = _mm_xor_si128(p1, sign_bit); // convert to signed values
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q1 = _mm_xor_si128(q1, sign_bit);
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p0 = _mm_xor_si128(p0, sign_bit);
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q0 = _mm_xor_si128(q0, sign_bit);
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//-----------------------------------------------------------------------------
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// Edge filtering functions
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p1 = _mm_subs_epi8(p1, q1); // p1 - q1
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t1 = _mm_subs_epi8(q0, p0); // q0 - p0
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 1 * (q0 - p0)
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 2 * (q0 - p0)
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p1 = _mm_adds_epi8(p1, t1); // p1 - q1 + 3 * (q0 - p0)
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p1 = _mm_and_si128(mask, p1); // mask filter values we don't care about
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// Applies filter on p0 and q0
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static void DoFilter2(const __m128i* p1, __m128i* p0, __m128i* q0,
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const __m128i* q1, int thresh) {
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__m128i t1, t2, mask;
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const __m128i sign_bit = _mm_set1_epi8(0x80);
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NeedsFilter(p1, p0, q0, q1, thresh, &mask);
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// convert to signed values
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*p0 = _mm_xor_si128(*p0, sign_bit);
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*q0 = _mm_xor_si128(*q0, sign_bit);
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t1 = _mm_xor_si128(*p1, sign_bit);
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t2 = _mm_xor_si128(*q1, sign_bit);
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t1 = _mm_subs_epi8(t1, t2); // p1 - q1
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t2 = _mm_subs_epi8(*q0, *p0); // q0 - p0
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t1 = _mm_adds_epi8(t1, t2); // p1 - q1 + 1 * (q0 - p0)
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t1 = _mm_adds_epi8(t1, t2); // p1 - q1 + 2 * (q0 - p0)
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t1 = _mm_adds_epi8(t1, t2); // p1 - q1 + 3 * (q0 - p0)
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t1 = _mm_and_si128(t1, mask); // mask filter values we don't care about
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// Do +4 side
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p1 = _mm_adds_epi8(p1, four); // 3 * (q0 - p0) + (p1 - q1) + 4
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t1 = p1;
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SignedShift3(&t1); // t1 >> 3
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q0 = _mm_subs_epi8(q0, t1); // q0 -= a
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*oq = _mm_xor_si128(q0, sign_bit); // unoffset
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t2 = _mm_set1_epi8(4);
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t2 = _mm_adds_epi8(t2, t1); // 3 * (q0 - p0) + (p1 - q1) + 4
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SIGNED_SHIFT_N(t2, 3); // t2 >> 3
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*q0 = _mm_subs_epi8(*q0, t2); // q0 -= a
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// Now do +3 side
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p1 = _mm_subs_epi8(p1, one); // +3 instead of +4
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SignedShift3(&p1); // p1 >> 3
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p0 = _mm_adds_epi8(p0, p1); // p0 += b
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*op = _mm_xor_si128(p0, sign_bit); // unoffset
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t2 = _mm_set1_epi8(3);
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t2 = _mm_adds_epi8(t2, t1); // +3 instead of +4
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SIGNED_SHIFT_N(t2, 3); // t2 >> 3
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*p0 = _mm_adds_epi8(*p0, t2); // p0 += b
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// unoffset
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*p0 = _mm_xor_si128(*p0, sign_bit);
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*q0 = _mm_xor_si128(*q0, sign_bit);
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}
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// Reads 8 rows across a vertical edge.
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@ -330,21 +341,20 @@ static inline void Store4x4(__m128i* x, uint8_t* dst, int stride) {
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}
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//-----------------------------------------------------------------------------
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// Simple In-loop filtering (Paragraph 15.2)
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static void SimpleVFilter16SSE2(uint8_t* p, int stride, int thresh) {
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__m128i op, oq;
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// Load
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const __m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]);
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const __m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]);
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const __m128i q0 = _mm_loadu_si128((__m128i*)&p[0]);
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const __m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]);
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__m128i p1 = _mm_loadu_si128((__m128i*)&p[-2 * stride]);
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__m128i p0 = _mm_loadu_si128((__m128i*)&p[-stride]);
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__m128i q0 = _mm_loadu_si128((__m128i*)&p[0]);
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__m128i q1 = _mm_loadu_si128((__m128i*)&p[stride]);
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DoFilter2SSE2(p1, p0, q0, q1, thresh, &op, &oq);
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DoFilter2(&p1, &p0, &q0, &q1, thresh);
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// Store
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_mm_store_si128((__m128i*)&p[-stride], op);
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_mm_store_si128((__m128i*)p, oq);
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_mm_store_si128((__m128i*)&p[-stride], p0);
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_mm_store_si128((__m128i*)p, q0);
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}
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static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) {
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@ -378,7 +388,9 @@ static void SimpleHFilter16SSE2(uint8_t* p, int stride, int thresh) {
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q1 = _mm_unpackhi_epi64(t2, q1);
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// Filter
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DoFilter2SSE2(p1, p0, q0, q1, thresh, &t1, &t2);
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DoFilter2(&p1, &p0, &q0, &q1, thresh);
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t1 = p0;
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t2 = q0;
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// Transpose back to write out
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// p0 = 71 70 61 60 51 50 41 40 31 30 21 20 11 10 01 00
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@ -431,6 +443,7 @@ extern void VP8DspInitSSE2(void);
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void VP8DspInitSSE2(void) {
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VP8Transform = TransformSSE2;
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VP8SimpleVFilter16 = SimpleVFilter16SSE2;
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VP8SimpleHFilter16 = SimpleHFilter16SSE2;
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VP8SimpleVFilter16i = SimpleVFilter16iSSE2;
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