| /* |
| * Copyright (c) 2017, Alliance for Open Media. All rights reserved |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <altivec.h> |
| |
| #include "config/av1_rtcd.h" |
| |
| #include "av1/common/cfl.h" |
| |
| #define OFF_0 0 |
| #define OFF_1 16 |
| #define OFF_2 32 |
| #define OFF_3 48 |
| #define CFL_BUF_LINE_BYTES 64 |
| #define CFL_LINE_1 64 |
| #define CFL_LINE_2 128 |
| #define CFL_LINE_3 192 |
| |
| typedef vector signed char int8x16_t; // NOLINT(runtime/int) |
| typedef vector unsigned char uint8x16_t; // NOLINT(runtime/int) |
| typedef vector signed short int16x8_t; // NOLINT(runtime/int) |
| typedef vector unsigned short uint16x8_t; // NOLINT(runtime/int) |
| typedef vector signed int int32x4_t; // NOLINT(runtime/int) |
| typedef vector unsigned int uint32x4_t; // NOLINT(runtime/int) |
| typedef vector unsigned long long uint64x2_t; // NOLINT(runtime/int) |
| |
| static INLINE void subtract_average_vsx(const uint16_t *src_ptr, int16_t *dst, |
| int width, int height, int round_offset, |
| int num_pel_log2) { |
| // int16_t *dst = dst_ptr; |
| const int16_t *dst_end = dst + height * CFL_BUF_LINE; |
| const int16_t *sum_buf = (const int16_t *)src_ptr; |
| const int16_t *end = sum_buf + height * CFL_BUF_LINE; |
| const uint32x4_t div_shift = vec_splats((uint32_t)num_pel_log2); |
| const uint8x16_t mask_64 = { 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, |
| 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 }; |
| const uint8x16_t mask_32 = { 0x14, 0x15, 0x16, 0x17, 0x00, 0x01, 0x02, 0x03, |
| 0x1C, 0x1D, 0x1E, 0x1F, 0x08, 0x09, 0x0A, 0x0B }; |
| |
| int32x4_t sum_32x4_0 = { 0, 0, 0, round_offset }; |
| int32x4_t sum_32x4_1 = { 0, 0, 0, 0 }; |
| do { |
| sum_32x4_0 = vec_sum4s(vec_vsx_ld(OFF_0, sum_buf), sum_32x4_0); |
| sum_32x4_1 = vec_sum4s(vec_vsx_ld(OFF_0 + CFL_LINE_1, sum_buf), sum_32x4_1); |
| if (width >= 16) { |
| sum_32x4_0 = vec_sum4s(vec_vsx_ld(OFF_1, sum_buf), sum_32x4_0); |
| sum_32x4_1 = |
| vec_sum4s(vec_vsx_ld(OFF_1 + CFL_LINE_1, sum_buf), sum_32x4_1); |
| } |
| if (width == 32) { |
| sum_32x4_0 = vec_sum4s(vec_vsx_ld(OFF_2, sum_buf), sum_32x4_0); |
| sum_32x4_1 = |
| vec_sum4s(vec_vsx_ld(OFF_2 + CFL_LINE_1, sum_buf), sum_32x4_1); |
| sum_32x4_0 = vec_sum4s(vec_vsx_ld(OFF_3, sum_buf), sum_32x4_0); |
| sum_32x4_1 = |
| vec_sum4s(vec_vsx_ld(OFF_3 + CFL_LINE_1, sum_buf), sum_32x4_1); |
| } |
| } while ((sum_buf += (CFL_BUF_LINE * 2)) < end); |
| int32x4_t sum_32x4 = vec_add(sum_32x4_0, sum_32x4_1); |
| |
| const int32x4_t perm_64 = vec_perm(sum_32x4, sum_32x4, mask_64); |
| sum_32x4 = vec_add(sum_32x4, perm_64); |
| const int32x4_t perm_32 = vec_perm(sum_32x4, sum_32x4, mask_32); |
| sum_32x4 = vec_add(sum_32x4, perm_32); |
| const int32x4_t avg = vec_sr(sum_32x4, div_shift); |
| const int16x8_t vec_avg = vec_pack(avg, avg); |
| do { |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_0, dst), vec_avg), OFF_0, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_0 + CFL_LINE_1, dst), vec_avg), |
| OFF_0 + CFL_BUF_LINE_BYTES, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_0 + CFL_LINE_2, dst), vec_avg), |
| OFF_0 + CFL_LINE_2, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_0 + CFL_LINE_3, dst), vec_avg), |
| OFF_0 + CFL_LINE_3, dst); |
| if (width >= 16) { |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_1, dst), vec_avg), OFF_1, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_1 + CFL_LINE_1, dst), vec_avg), |
| OFF_1 + CFL_LINE_1, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_1 + CFL_LINE_2, dst), vec_avg), |
| OFF_1 + CFL_LINE_2, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_1 + CFL_LINE_3, dst), vec_avg), |
| OFF_1 + CFL_LINE_3, dst); |
| } |
| if (width == 32) { |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_2, dst), vec_avg), OFF_2, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_2 + CFL_LINE_1, dst), vec_avg), |
| OFF_2 + CFL_LINE_1, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_2 + CFL_LINE_2, dst), vec_avg), |
| OFF_2 + CFL_LINE_2, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_2 + CFL_LINE_3, dst), vec_avg), |
| OFF_2 + CFL_LINE_3, dst); |
| |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_3, dst), vec_avg), OFF_3, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_3 + CFL_LINE_1, dst), vec_avg), |
| OFF_3 + CFL_LINE_1, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_3 + CFL_LINE_2, dst), vec_avg), |
| OFF_3 + CFL_LINE_2, dst); |
| vec_vsx_st(vec_sub(vec_vsx_ld(OFF_3 + CFL_LINE_3, dst), vec_avg), |
| OFF_3 + CFL_LINE_3, dst); |
| } |
| } while ((dst += CFL_BUF_LINE * 4) < dst_end); |
| } |
| |
| // Declare wrappers for VSX sizes |
| CFL_SUB_AVG_X(vsx, 8, 4, 16, 5) |
| CFL_SUB_AVG_X(vsx, 8, 8, 32, 6) |
| CFL_SUB_AVG_X(vsx, 8, 16, 64, 7) |
| CFL_SUB_AVG_X(vsx, 8, 32, 128, 8) |
| CFL_SUB_AVG_X(vsx, 16, 4, 32, 6) |
| CFL_SUB_AVG_X(vsx, 16, 8, 64, 7) |
| CFL_SUB_AVG_X(vsx, 16, 16, 128, 8) |
| CFL_SUB_AVG_X(vsx, 16, 32, 256, 9) |
| CFL_SUB_AVG_X(vsx, 32, 8, 128, 8) |
| CFL_SUB_AVG_X(vsx, 32, 16, 256, 9) |
| CFL_SUB_AVG_X(vsx, 32, 32, 512, 10) |
| |
| // Based on observation, for small blocks VSX does not outperform C (no 64bit |
| // load and store intrinsics). So we call the C code for block widths 4. |
| cfl_subtract_average_fn cfl_get_subtract_average_fn_vsx(TX_SIZE tx_size) { |
| static const cfl_subtract_average_fn sub_avg[TX_SIZES_ALL] = { |
| cfl_subtract_average_4x4_c, /* 4x4 */ |
| cfl_subtract_average_8x8_vsx, /* 8x8 */ |
| cfl_subtract_average_16x16_vsx, /* 16x16 */ |
| cfl_subtract_average_32x32_vsx, /* 32x32 */ |
| NULL, /* 64x64 (invalid CFL size) */ |
| cfl_subtract_average_4x8_c, /* 4x8 */ |
| cfl_subtract_average_8x4_vsx, /* 8x4 */ |
| cfl_subtract_average_8x16_vsx, /* 8x16 */ |
| cfl_subtract_average_16x8_vsx, /* 16x8 */ |
| cfl_subtract_average_16x32_vsx, /* 16x32 */ |
| cfl_subtract_average_32x16_vsx, /* 32x16 */ |
| NULL, /* 32x64 (invalid CFL size) */ |
| NULL, /* 64x32 (invalid CFL size) */ |
| cfl_subtract_average_4x16_c, /* 4x16 */ |
| cfl_subtract_average_16x4_vsx, /* 16x4 */ |
| cfl_subtract_average_8x32_vsx, /* 8x32 */ |
| cfl_subtract_average_32x8_vsx, /* 32x8 */ |
| NULL, /* 16x64 (invalid CFL size) */ |
| NULL, /* 64x16 (invalid CFL size) */ |
| }; |
| // Modulo TX_SIZES_ALL to ensure that an attacker won't be able to |
| // index the function pointer array out of bounds. |
| return sub_avg[tx_size % TX_SIZES_ALL]; |
| } |
