diff options
Diffstat (limited to 'media/libvpx/vp8/encoder/x86/quantize_sse4.c')
| -rw-r--r-- | media/libvpx/vp8/encoder/x86/quantize_sse4.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/media/libvpx/vp8/encoder/x86/quantize_sse4.c b/media/libvpx/vp8/encoder/x86/quantize_sse4.c new file mode 100644 index 000000000..601dd23a2 --- /dev/null +++ b/media/libvpx/vp8/encoder/x86/quantize_sse4.c @@ -0,0 +1,128 @@ +/* + * Copyright (c) 2012 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + + +#include <smmintrin.h> /* SSE4.1 */ + +#include "./vp8_rtcd.h" +#include "vp8/encoder/block.h" +#include "vp8/common/entropy.h" /* vp8_default_inv_zig_zag */ + +#define SELECT_EOB(i, z, x, y, q) \ + do { \ + short boost = *zbin_boost_ptr; \ + short x_z = _mm_extract_epi16(x, z); \ + short y_z = _mm_extract_epi16(y, z); \ + int cmp = (x_z < boost) | (y_z == 0); \ + zbin_boost_ptr++; \ + if (cmp) \ + break; \ + q = _mm_insert_epi16(q, y_z, z); \ + eob = i; \ + zbin_boost_ptr = b->zrun_zbin_boost; \ + } while (0) + +void vp8_regular_quantize_b_sse4_1(BLOCK *b, BLOCKD *d) { + char eob = 0; + short *zbin_boost_ptr = b->zrun_zbin_boost; + + __m128i sz0, x0, sz1, x1, y0, y1, x_minus_zbin0, x_minus_zbin1, + dqcoeff0, dqcoeff1; + __m128i quant_shift0 = _mm_load_si128((__m128i *)(b->quant_shift)); + __m128i quant_shift1 = _mm_load_si128((__m128i *)(b->quant_shift + 8)); + __m128i z0 = _mm_load_si128((__m128i *)(b->coeff)); + __m128i z1 = _mm_load_si128((__m128i *)(b->coeff+8)); + __m128i zbin_extra = _mm_cvtsi32_si128(b->zbin_extra); + __m128i zbin0 = _mm_load_si128((__m128i *)(b->zbin)); + __m128i zbin1 = _mm_load_si128((__m128i *)(b->zbin + 8)); + __m128i round0 = _mm_load_si128((__m128i *)(b->round)); + __m128i round1 = _mm_load_si128((__m128i *)(b->round + 8)); + __m128i quant0 = _mm_load_si128((__m128i *)(b->quant)); + __m128i quant1 = _mm_load_si128((__m128i *)(b->quant + 8)); + __m128i dequant0 = _mm_load_si128((__m128i *)(d->dequant)); + __m128i dequant1 = _mm_load_si128((__m128i *)(d->dequant + 8)); + __m128i qcoeff0 = _mm_setzero_si128(); + __m128i qcoeff1 = _mm_setzero_si128(); + + /* Duplicate to all lanes. */ + zbin_extra = _mm_shufflelo_epi16(zbin_extra, 0); + zbin_extra = _mm_unpacklo_epi16(zbin_extra, zbin_extra); + + /* Sign of z: z >> 15 */ + sz0 = _mm_srai_epi16(z0, 15); + sz1 = _mm_srai_epi16(z1, 15); + + /* x = abs(z): (z ^ sz) - sz */ + x0 = _mm_xor_si128(z0, sz0); + x1 = _mm_xor_si128(z1, sz1); + x0 = _mm_sub_epi16(x0, sz0); + x1 = _mm_sub_epi16(x1, sz1); + + /* zbin[] + zbin_extra */ + zbin0 = _mm_add_epi16(zbin0, zbin_extra); + zbin1 = _mm_add_epi16(zbin1, zbin_extra); + + /* In C x is compared to zbin where zbin = zbin[] + boost + extra. Rebalance + * the equation because boost is the only value which can change: + * x - (zbin[] + extra) >= boost */ + x_minus_zbin0 = _mm_sub_epi16(x0, zbin0); + x_minus_zbin1 = _mm_sub_epi16(x1, zbin1); + + /* All the remaining calculations are valid whether they are done now with + * simd or later inside the loop one at a time. */ + x0 = _mm_add_epi16(x0, round0); + x1 = _mm_add_epi16(x1, round1); + + y0 = _mm_mulhi_epi16(x0, quant0); + y1 = _mm_mulhi_epi16(x1, quant1); + + y0 = _mm_add_epi16(y0, x0); + y1 = _mm_add_epi16(y1, x1); + + /* Instead of shifting each value independently we convert the scaling + * factor with 1 << (16 - shift) so we can use multiply/return high half. */ + y0 = _mm_mulhi_epi16(y0, quant_shift0); + y1 = _mm_mulhi_epi16(y1, quant_shift1); + + /* Return the sign: (y ^ sz) - sz */ + y0 = _mm_xor_si128(y0, sz0); + y1 = _mm_xor_si128(y1, sz1); + y0 = _mm_sub_epi16(y0, sz0); + y1 = _mm_sub_epi16(y1, sz1); + + /* The loop gets unrolled anyway. Avoid the vp8_default_zig_zag1d lookup. */ + SELECT_EOB(1, 0, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(2, 1, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(3, 4, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(4, 0, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(5, 5, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(6, 2, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(7, 3, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(8, 6, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(9, 1, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(10, 4, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(11, 5, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(12, 2, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(13, 7, x_minus_zbin0, y0, qcoeff0); + SELECT_EOB(14, 3, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(15, 6, x_minus_zbin1, y1, qcoeff1); + SELECT_EOB(16, 7, x_minus_zbin1, y1, qcoeff1); + + _mm_store_si128((__m128i *)(d->qcoeff), qcoeff0); + _mm_store_si128((__m128i *)(d->qcoeff + 8), qcoeff1); + + dqcoeff0 = _mm_mullo_epi16(qcoeff0, dequant0); + dqcoeff1 = _mm_mullo_epi16(qcoeff1, dequant1); + + _mm_store_si128((__m128i *)(d->dqcoeff), dqcoeff0); + _mm_store_si128((__m128i *)(d->dqcoeff + 8), dqcoeff1); + + *d->eob = eob; +} |