diff options
Diffstat (limited to 'media/libvpx/libvpx/vp9/encoder/ppc/vp9_quantize_vsx.c')
-rw-r--r-- | media/libvpx/libvpx/vp9/encoder/ppc/vp9_quantize_vsx.c | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/ppc/vp9_quantize_vsx.c b/media/libvpx/libvpx/vp9/encoder/ppc/vp9_quantize_vsx.c new file mode 100644 index 0000000000..4d31558471 --- /dev/null +++ b/media/libvpx/libvpx/vp9/encoder/ppc/vp9_quantize_vsx.c @@ -0,0 +1,287 @@ +/* + * Copyright (c) 2018 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 "./vpx_config.h" + +#include "./vp9_rtcd.h" +#include "vpx_dsp/ppc/types_vsx.h" + +// Multiply the packed 16-bit integers in a and b, producing intermediate 32-bit +// integers, and return the high 16 bits of the intermediate integers. +// (a * b) >> 16 +// Note: Because this is done in 2 operations, a and b cannot both be UINT16_MIN +static INLINE int16x8_t vec_mulhi(int16x8_t a, int16x8_t b) { + // madds does ((A * B) >> 15) + C, we need >> 16, so we perform an extra right + // shift. + return vec_sra(vec_madds(a, b, vec_zeros_s16), vec_ones_u16); +} + +// Negate 16-bit integers in a when the corresponding signed 16-bit +// integer in b is negative. +static INLINE int16x8_t vec_sign(int16x8_t a, int16x8_t b) { + const int16x8_t mask = vec_sra(b, vec_shift_sign_s16); + return vec_xor(vec_add(a, mask), mask); +} + +// Compare packed 16-bit integers across a, and return the maximum value in +// every element. Returns a vector containing the biggest value across vector a. +static INLINE int16x8_t vec_max_across(int16x8_t a) { + a = vec_max(a, vec_perm(a, a, vec_perm64)); + a = vec_max(a, vec_perm(a, a, vec_perm32)); + return vec_max(a, vec_perm(a, a, vec_perm16)); +} + +void vp9_quantize_fp_vsx(const tran_low_t *coeff_ptr, intptr_t n_coeffs, + const int16_t *round_ptr, const int16_t *quant_ptr, + tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + int16x8_t qcoeff0, qcoeff1, dqcoeff0, dqcoeff1, eob; + bool16x8_t zero_coeff0, zero_coeff1; + + int16x8_t round = vec_vsx_ld(0, round_ptr); + int16x8_t quant = vec_vsx_ld(0, quant_ptr); + int16x8_t dequant = vec_vsx_ld(0, dequant_ptr); + int16x8_t coeff0 = vec_vsx_ld(0, coeff_ptr); + int16x8_t coeff1 = vec_vsx_ld(16, coeff_ptr); + int16x8_t scan0 = vec_vsx_ld(0, iscan); + int16x8_t scan1 = vec_vsx_ld(16, iscan); + + (void)scan; + + // First set of 8 coeff starts with DC + 7 AC + qcoeff0 = vec_mulhi(vec_vaddshs(vec_abs(coeff0), round), quant); + zero_coeff0 = vec_cmpeq(qcoeff0, vec_zeros_s16); + qcoeff0 = vec_sign(qcoeff0, coeff0); + vec_vsx_st(qcoeff0, 0, qcoeff_ptr); + + dqcoeff0 = vec_mladd(qcoeff0, dequant, vec_zeros_s16); + vec_vsx_st(dqcoeff0, 0, dqcoeff_ptr); + + // Remove DC value from round and quant + round = vec_splat(round, 1); + quant = vec_splat(quant, 1); + + // Remove DC value from dequant + dequant = vec_splat(dequant, 1); + + // Second set of 8 coeff starts with (all AC) + qcoeff1 = vec_mulhi(vec_vaddshs(vec_abs(coeff1), round), quant); + zero_coeff1 = vec_cmpeq(qcoeff1, vec_zeros_s16); + qcoeff1 = vec_sign(qcoeff1, coeff1); + vec_vsx_st(qcoeff1, 16, qcoeff_ptr); + + dqcoeff1 = vec_mladd(qcoeff1, dequant, vec_zeros_s16); + vec_vsx_st(dqcoeff1, 16, dqcoeff_ptr); + + eob = vec_max(vec_or(scan0, zero_coeff0), vec_or(scan1, zero_coeff1)); + + // We quantize 16 coeff up front (enough for a 4x4) and process 24 coeff per + // loop iteration. + // for 8x8: 16 + 2 x 24 = 64 + // for 16x16: 16 + 10 x 24 = 256 + if (n_coeffs > 16) { + int16x8_t coeff2, qcoeff2, dqcoeff2, eob2, scan2; + bool16x8_t zero_coeff2; + + int index = 16; + int off0 = 32; + int off1 = 48; + int off2 = 64; + + do { + coeff0 = vec_vsx_ld(off0, coeff_ptr); + coeff1 = vec_vsx_ld(off1, coeff_ptr); + coeff2 = vec_vsx_ld(off2, coeff_ptr); + scan0 = vec_vsx_ld(off0, iscan); + scan1 = vec_vsx_ld(off1, iscan); + scan2 = vec_vsx_ld(off2, iscan); + + qcoeff0 = vec_mulhi(vec_vaddshs(vec_abs(coeff0), round), quant); + zero_coeff0 = vec_cmpeq(qcoeff0, vec_zeros_s16); + qcoeff0 = vec_sign(qcoeff0, coeff0); + vec_vsx_st(qcoeff0, off0, qcoeff_ptr); + dqcoeff0 = vec_mladd(qcoeff0, dequant, vec_zeros_s16); + vec_vsx_st(dqcoeff0, off0, dqcoeff_ptr); + + qcoeff1 = vec_mulhi(vec_vaddshs(vec_abs(coeff1), round), quant); + zero_coeff1 = vec_cmpeq(qcoeff1, vec_zeros_s16); + qcoeff1 = vec_sign(qcoeff1, coeff1); + vec_vsx_st(qcoeff1, off1, qcoeff_ptr); + dqcoeff1 = vec_mladd(qcoeff1, dequant, vec_zeros_s16); + vec_vsx_st(dqcoeff1, off1, dqcoeff_ptr); + + qcoeff2 = vec_mulhi(vec_vaddshs(vec_abs(coeff2), round), quant); + zero_coeff2 = vec_cmpeq(qcoeff2, vec_zeros_s16); + qcoeff2 = vec_sign(qcoeff2, coeff2); + vec_vsx_st(qcoeff2, off2, qcoeff_ptr); + dqcoeff2 = vec_mladd(qcoeff2, dequant, vec_zeros_s16); + vec_vsx_st(dqcoeff2, off2, dqcoeff_ptr); + + eob = vec_max(eob, vec_or(scan0, zero_coeff0)); + eob2 = vec_max(vec_or(scan1, zero_coeff1), vec_or(scan2, zero_coeff2)); + eob = vec_max(eob, eob2); + + index += 24; + off0 += 48; + off1 += 48; + off2 += 48; + } while (index < n_coeffs); + } + + eob = vec_max_across(eob); + *eob_ptr = eob[0] + 1; +} + +// Sets the value of a 32-bit integers to 1 when the corresponding value in a is +// negative. +static INLINE int32x4_t vec_is_neg(int32x4_t a) { + return vec_sr(a, vec_shift_sign_s32); +} + +// DeQuantization function used for 32x32 blocks. Quantized coeff of 32x32 +// blocks are twice as big as for other block sizes. As such, using +// vec_mladd results in overflow. +static INLINE int16x8_t dequantize_coeff_32(int16x8_t qcoeff, + int16x8_t dequant) { + int32x4_t dqcoeffe = vec_mule(qcoeff, dequant); + int32x4_t dqcoeffo = vec_mulo(qcoeff, dequant); + // Add 1 if negative to round towards zero because the C uses division. + dqcoeffe = vec_add(dqcoeffe, vec_is_neg(dqcoeffe)); + dqcoeffo = vec_add(dqcoeffo, vec_is_neg(dqcoeffo)); + dqcoeffe = vec_sra(dqcoeffe, vec_ones_u32); + dqcoeffo = vec_sra(dqcoeffo, vec_ones_u32); + return (int16x8_t)vec_perm(dqcoeffe, dqcoeffo, vec_perm_odd_even_pack); +} + +void vp9_quantize_fp_32x32_vsx(const tran_low_t *coeff_ptr, intptr_t n_coeffs, + const int16_t *round_ptr, + const int16_t *quant_ptr, tran_low_t *qcoeff_ptr, + tran_low_t *dqcoeff_ptr, + const int16_t *dequant_ptr, uint16_t *eob_ptr, + const int16_t *scan, const int16_t *iscan) { + // In stage 1, we quantize 16 coeffs (DC + 15 AC) + // In stage 2, we loop 42 times and quantize 24 coeffs per iteration + // (32 * 32 - 16) / 24 = 42 + int num_itr = 42; + // Offsets are in bytes, 16 coeffs = 32 bytes + int off0 = 32; + int off1 = 48; + int off2 = 64; + + int16x8_t qcoeff0, qcoeff1, dqcoeff0, dqcoeff1, eob; + bool16x8_t mask0, mask1, zero_coeff0, zero_coeff1; + + int16x8_t round = vec_vsx_ld(0, round_ptr); + int16x8_t quant = vec_vsx_ld(0, quant_ptr); + int16x8_t dequant = vec_vsx_ld(0, dequant_ptr); + int16x8_t coeff0 = vec_vsx_ld(0, coeff_ptr); + int16x8_t coeff1 = vec_vsx_ld(16, coeff_ptr); + int16x8_t scan0 = vec_vsx_ld(0, iscan); + int16x8_t scan1 = vec_vsx_ld(16, iscan); + int16x8_t thres = vec_sra(dequant, vec_splats((uint16_t)2)); + int16x8_t abs_coeff0 = vec_abs(coeff0); + int16x8_t abs_coeff1 = vec_abs(coeff1); + + (void)scan; + (void)n_coeffs; + + mask0 = vec_cmpge(abs_coeff0, thres); + round = vec_sra(vec_add(round, vec_ones_s16), vec_ones_u16); + // First set of 8 coeff starts with DC + 7 AC + qcoeff0 = vec_madds(vec_vaddshs(abs_coeff0, round), quant, vec_zeros_s16); + qcoeff0 = vec_and(qcoeff0, mask0); + zero_coeff0 = vec_cmpeq(qcoeff0, vec_zeros_s16); + qcoeff0 = vec_sign(qcoeff0, coeff0); + vec_vsx_st(qcoeff0, 0, qcoeff_ptr); + + dqcoeff0 = dequantize_coeff_32(qcoeff0, dequant); + vec_vsx_st(dqcoeff0, 0, dqcoeff_ptr); + + // Remove DC value from thres, round, quant and dequant + thres = vec_splat(thres, 1); + round = vec_splat(round, 1); + quant = vec_splat(quant, 1); + dequant = vec_splat(dequant, 1); + + mask1 = vec_cmpge(abs_coeff1, thres); + + // Second set of 8 coeff starts with (all AC) + qcoeff1 = + vec_madds(vec_vaddshs(vec_abs(coeff1), round), quant, vec_zeros_s16); + qcoeff1 = vec_and(qcoeff1, mask1); + zero_coeff1 = vec_cmpeq(qcoeff1, vec_zeros_s16); + qcoeff1 = vec_sign(qcoeff1, coeff1); + vec_vsx_st(qcoeff1, 16, qcoeff_ptr); + + dqcoeff1 = dequantize_coeff_32(qcoeff1, dequant); + vec_vsx_st(dqcoeff1, 16, dqcoeff_ptr); + + eob = vec_max(vec_or(scan0, zero_coeff0), vec_or(scan1, zero_coeff1)); + + do { + int16x8_t coeff2, abs_coeff2, qcoeff2, dqcoeff2, eob2, scan2; + bool16x8_t zero_coeff2, mask2; + coeff0 = vec_vsx_ld(off0, coeff_ptr); + coeff1 = vec_vsx_ld(off1, coeff_ptr); + coeff2 = vec_vsx_ld(off2, coeff_ptr); + scan0 = vec_vsx_ld(off0, iscan); + scan1 = vec_vsx_ld(off1, iscan); + scan2 = vec_vsx_ld(off2, iscan); + + abs_coeff0 = vec_abs(coeff0); + abs_coeff1 = vec_abs(coeff1); + abs_coeff2 = vec_abs(coeff2); + + qcoeff0 = vec_madds(vec_vaddshs(abs_coeff0, round), quant, vec_zeros_s16); + qcoeff1 = vec_madds(vec_vaddshs(abs_coeff1, round), quant, vec_zeros_s16); + qcoeff2 = vec_madds(vec_vaddshs(abs_coeff2, round), quant, vec_zeros_s16); + + mask0 = vec_cmpge(abs_coeff0, thres); + mask1 = vec_cmpge(abs_coeff1, thres); + mask2 = vec_cmpge(abs_coeff2, thres); + + qcoeff0 = vec_and(qcoeff0, mask0); + qcoeff1 = vec_and(qcoeff1, mask1); + qcoeff2 = vec_and(qcoeff2, mask2); + + zero_coeff0 = vec_cmpeq(qcoeff0, vec_zeros_s16); + zero_coeff1 = vec_cmpeq(qcoeff1, vec_zeros_s16); + zero_coeff2 = vec_cmpeq(qcoeff2, vec_zeros_s16); + + qcoeff0 = vec_sign(qcoeff0, coeff0); + qcoeff1 = vec_sign(qcoeff1, coeff1); + qcoeff2 = vec_sign(qcoeff2, coeff2); + + vec_vsx_st(qcoeff0, off0, qcoeff_ptr); + vec_vsx_st(qcoeff1, off1, qcoeff_ptr); + vec_vsx_st(qcoeff2, off2, qcoeff_ptr); + + dqcoeff0 = dequantize_coeff_32(qcoeff0, dequant); + dqcoeff1 = dequantize_coeff_32(qcoeff1, dequant); + dqcoeff2 = dequantize_coeff_32(qcoeff2, dequant); + + vec_vsx_st(dqcoeff0, off0, dqcoeff_ptr); + vec_vsx_st(dqcoeff1, off1, dqcoeff_ptr); + vec_vsx_st(dqcoeff2, off2, dqcoeff_ptr); + + eob = vec_max(eob, vec_or(scan0, zero_coeff0)); + eob2 = vec_max(vec_or(scan1, zero_coeff1), vec_or(scan2, zero_coeff2)); + eob = vec_max(eob, eob2); + + off0 += 48; + off1 += 48; + off2 += 48; + num_itr--; + } while (num_itr != 0); + + eob = vec_max_across(eob); + *eob_ptr = eob[0] + 1; +} |