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Optimize quantization simd implementation

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This commit allows the quantizer to compare the AC coefficients to
the quantization step size to determine if further multiplication
operations are needed. It makes the quantization process 20% faster
without coding statistics change.

Change-Id: I735aaf6a9c0874c82175bb565b20e131464db64a
This commit is contained in:
Jingning Han 2015-04-01 11:39:36 -07:00
parent 502ac72233
commit eed1badedd
2 changed files with 61 additions and 33 deletions
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47
vp9/encoder/x86/vp9_dct_ssse3.c
View File

@ -293,7 +293,8 @@ void vp9_fdct8x8_quant_ssse3(const int16_t *input, int stride,
if (!skip_block) {
__m128i eob;
__m128i round, quant, dequant;
__m128i round, quant, dequant, thr;
int16_t nzflag;
{
__m128i coeff0, coeff1;
@ -368,6 +369,7 @@ void vp9_fdct8x8_quant_ssse3(const int16_t *input, int stride,
// AC only loop
index = 2;
thr = _mm_srai_epi16(dequant, 1);
while (n_coeffs < 0) {
__m128i coeff0, coeff1;
{
@ -387,28 +389,39 @@ void vp9_fdct8x8_quant_ssse3(const int16_t *input, int stride,
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) |
_mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
if (nzflag) {
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
} else {
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);
}
}
{
if (nzflag) {
// Scan for eob
__m128i zero_coeff0, zero_coeff1;
__m128i nzero_coeff0, nzero_coeff1;

47
vp9/encoder/x86/vp9_quantize_sse2.c
View File

@ -230,6 +230,8 @@ void vp9_quantize_fp_sse2(const int16_t* coeff_ptr, intptr_t n_coeffs,
const int16_t* scan_ptr,
const int16_t* iscan_ptr) {
__m128i zero;
__m128i thr;
int16_t nzflag;
(void)scan_ptr;
(void)zbin_ptr;
(void)quant_shift_ptr;
@ -316,6 +318,8 @@ void vp9_quantize_fp_sse2(const int16_t* coeff_ptr, intptr_t n_coeffs,
n_coeffs += 8 * 2;
}
thr = _mm_srai_epi16(dequant, 1);
// AC only loop
while (n_coeffs < 0) {
__m128i coeff0, coeff1;
@ -335,28 +339,39 @@ void vp9_quantize_fp_sse2(const int16_t* coeff_ptr, intptr_t n_coeffs,
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
nzflag = _mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff0, thr)) |
_mm_movemask_epi8(_mm_cmpgt_epi16(qcoeff1, thr));
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
if (nzflag) {
qcoeff0 = _mm_adds_epi16(qcoeff0, round);
qcoeff1 = _mm_adds_epi16(qcoeff1, round);
qtmp0 = _mm_mulhi_epi16(qcoeff0, quant);
qtmp1 = _mm_mulhi_epi16(qcoeff1, quant);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);
// Reinsert signs
qcoeff0 = _mm_xor_si128(qtmp0, coeff0_sign);
qcoeff1 = _mm_xor_si128(qtmp1, coeff1_sign);
qcoeff0 = _mm_sub_epi16(qcoeff0, coeff0_sign);
qcoeff1 = _mm_sub_epi16(qcoeff1, coeff1_sign);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), qcoeff0);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, qcoeff1);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
coeff0 = _mm_mullo_epi16(qcoeff0, dequant);
coeff1 = _mm_mullo_epi16(qcoeff1, dequant);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), coeff0);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, coeff1);
} else {
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs), zero);
_mm_store_si128((__m128i*)(qcoeff_ptr + n_coeffs) + 1, zero);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs), zero);
_mm_store_si128((__m128i*)(dqcoeff_ptr + n_coeffs) + 1, zero);
}
}
{
if (nzflag) {
// Scan for eob
__m128i zero_coeff0, zero_coeff1;
__m128i nzero_coeff0, nzero_coeff1;