godot/thirdparty/etcpak/Tables.cpp

#include "Tables.hpp"

const int32_t g_table[8][4] = {
    {  2,  8,   -2,   -8 },
    {  5, 17,   -5,  -17 },
    {  9, 29,   -9,  -29 },
    { 13, 42,  -13,  -42 },
    { 18, 60,  -18,  -60 },
    { 24, 80,  -24,  -80 },
    { 33, 106, -33, -106 },
    { 47, 183, -47, -183 }
};

const int64_t g_table256[8][4] = {
    {  2*256,  8*256,   -2*256,   -8*256 },
    {  5*256, 17*256,   -5*256,  -17*256 },
    {  9*256, 29*256,   -9*256,  -29*256 },
    { 13*256, 42*256,  -13*256,  -42*256 },
    { 18*256, 60*256,  -18*256,  -60*256 },
    { 24*256, 80*256,  -24*256,  -80*256 },
    { 33*256, 106*256, -33*256, -106*256 },
    { 47*256, 183*256, -47*256, -183*256 }
};

const uint32_t g_id[4][16] = {
    { 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0 },
    { 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2, 3, 3, 2, 2 },
    { 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4 },
    { 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6, 7, 7, 6, 6 }
};

const uint32_t g_avg2[16] = {
    0x00,
    0x11,
    0x22,
    0x33,
    0x44,
    0x55,
    0x66,
    0x77,
    0x88,
    0x99,
    0xAA,
    0xBB,
    0xCC,
    0xDD,
    0xEE,
    0xFF
};

const uint32_t g_flags[64] = {
    0x80800402, 0x80800402, 0x80800402, 0x80800402,
    0x80800402, 0x80800402, 0x80800402, 0x8080E002,
    0x80800402, 0x80800402, 0x8080E002, 0x8080E002,
    0x80800402, 0x8080E002, 0x8080E002, 0x8080E002,
    0x80000402, 0x80000402, 0x80000402, 0x80000402,
    0x80000402, 0x80000402, 0x80000402, 0x8000E002,
    0x80000402, 0x80000402, 0x8000E002, 0x8000E002,
    0x80000402, 0x8000E002, 0x8000E002, 0x8000E002,
    0x00800402, 0x00800402, 0x00800402, 0x00800402,
    0x00800402, 0x00800402, 0x00800402, 0x0080E002,
    0x00800402, 0x00800402, 0x0080E002, 0x0080E002,
    0x00800402, 0x0080E002, 0x0080E002, 0x0080E002,
    0x00000402, 0x00000402, 0x00000402, 0x00000402,
    0x00000402, 0x00000402, 0x00000402, 0x0000E002,
    0x00000402, 0x00000402, 0x0000E002, 0x0000E002,
    0x00000402, 0x0000E002, 0x0000E002, 0x0000E002
};

const int32_t g_alpha[16][8] = {
    { -3, -6,  -9, -15, 2, 5, 8, 14 },
    { -3, -7, -10, -13, 2, 6, 9, 12 },
    { -2, -5,  -8, -13, 1, 4, 7, 12 },
    { -2, -4,  -6, -13, 1, 3, 5, 12 },
    { -3, -6,  -8, -12, 2, 5, 7, 11 },
    { -3, -7,  -9, -11, 2, 6, 8, 10 },
    { -4, -7,  -8, -11, 3, 6, 7, 10 },
    { -3, -5,  -8, -11, 2, 4, 7, 10 },
    { -2, -6,  -8, -10, 1, 5, 7,  9 },
    { -2, -5,  -8, -10, 1, 4, 7,  9 },
    { -2, -4,  -8, -10, 1, 3, 7,  9 },
    { -2, -5,  -7, -10, 1, 4, 6,  9 },
    { -3, -4,  -7, -10, 2, 3, 6,  9 },
    { -1, -2,  -3, -10, 0, 1, 2,  9 },
    { -4, -6,  -8,  -9, 3, 5, 7,  8 },
    { -3, -5,  -7,  -9, 2, 4, 6,  8 }
};

const int32_t g_alphaRange[16] = {
    0x100FF / ( 1 + g_alpha[0][7] - g_alpha[0][3] ),
    0x100FF / ( 1 + g_alpha[1][7] - g_alpha[1][3] ),
    0x100FF / ( 1 + g_alpha[2][7] - g_alpha[2][3] ),
    0x100FF / ( 1 + g_alpha[3][7] - g_alpha[3][3] ),
    0x100FF / ( 1 + g_alpha[4][7] - g_alpha[4][3] ),
    0x100FF / ( 1 + g_alpha[5][7] - g_alpha[5][3] ),
    0x100FF / ( 1 + g_alpha[6][7] - g_alpha[6][3] ),
    0x100FF / ( 1 + g_alpha[7][7] - g_alpha[7][3] ),
    0x100FF / ( 1 + g_alpha[8][7] - g_alpha[8][3] ),
    0x100FF / ( 1 + g_alpha[9][7] - g_alpha[9][3] ),
    0x100FF / ( 1 + g_alpha[10][7] - g_alpha[10][3] ),
    0x100FF / ( 1 + g_alpha[11][7] - g_alpha[11][3] ),
    0x100FF / ( 1 + g_alpha[12][7] - g_alpha[12][3] ),
    0x100FF / ( 1 + g_alpha[13][7] - g_alpha[13][3] ),
    0x100FF / ( 1 + g_alpha[14][7] - g_alpha[14][3] ),
    0x100FF / ( 1 + g_alpha[15][7] - g_alpha[15][3] ),
};

#ifdef __SSE4_1__
const __m128i g_table_SIMD[2] =
{
    _mm_setr_epi16(   2,   5,   9,  13,  18,  24,  33,  47),
    _mm_setr_epi16(   8,  17,  29,  42,  60,  80, 106, 183)
};
const __m128i g_table128_SIMD[2] =
{
    _mm_setr_epi16(   2*128,   5*128,   9*128,  13*128,  18*128,  24*128,  33*128,  47*128),
    _mm_setr_epi16(   8*128,  17*128,  29*128,  42*128,  60*128,  80*128, 106*128, 183*128)
};
const __m128i g_table256_SIMD[4] =
{
    _mm_setr_epi32(  2*256,   5*256,   9*256,  13*256),
    _mm_setr_epi32(  8*256,  17*256,  29*256,  42*256),
    _mm_setr_epi32( 18*256,  24*256,  33*256,  47*256),
    _mm_setr_epi32( 60*256,  80*256, 106*256, 183*256)
};

const __m128i g_alpha_SIMD[16] = {
    _mm_setr_epi16( g_alpha[ 0][0], g_alpha[ 0][1], g_alpha[ 0][2], g_alpha[ 0][3], g_alpha[ 0][4], g_alpha[ 0][5], g_alpha[ 0][6], g_alpha[ 0][7] ),
    _mm_setr_epi16( g_alpha[ 1][0], g_alpha[ 1][1], g_alpha[ 1][2], g_alpha[ 1][3], g_alpha[ 1][4], g_alpha[ 1][5], g_alpha[ 1][6], g_alpha[ 1][7] ),
    _mm_setr_epi16( g_alpha[ 2][0], g_alpha[ 2][1], g_alpha[ 2][2], g_alpha[ 2][3], g_alpha[ 2][4], g_alpha[ 2][5], g_alpha[ 2][6], g_alpha[ 2][7] ),
    _mm_setr_epi16( g_alpha[ 3][0], g_alpha[ 3][1], g_alpha[ 3][2], g_alpha[ 3][3], g_alpha[ 3][4], g_alpha[ 3][5], g_alpha[ 3][6], g_alpha[ 3][7] ),
    _mm_setr_epi16( g_alpha[ 4][0], g_alpha[ 4][1], g_alpha[ 4][2], g_alpha[ 4][3], g_alpha[ 4][4], g_alpha[ 4][5], g_alpha[ 4][6], g_alpha[ 4][7] ),
    _mm_setr_epi16( g_alpha[ 5][0], g_alpha[ 5][1], g_alpha[ 5][2], g_alpha[ 5][3], g_alpha[ 5][4], g_alpha[ 5][5], g_alpha[ 5][6], g_alpha[ 5][7] ),
    _mm_setr_epi16( g_alpha[ 6][0], g_alpha[ 6][1], g_alpha[ 6][2], g_alpha[ 6][3], g_alpha[ 6][4], g_alpha[ 6][5], g_alpha[ 6][6], g_alpha[ 6][7] ),
    _mm_setr_epi16( g_alpha[ 7][0], g_alpha[ 7][1], g_alpha[ 7][2], g_alpha[ 7][3], g_alpha[ 7][4], g_alpha[ 7][5], g_alpha[ 7][6], g_alpha[ 7][7] ),
    _mm_setr_epi16( g_alpha[ 8][0], g_alpha[ 8][1], g_alpha[ 8][2], g_alpha[ 8][3], g_alpha[ 8][4], g_alpha[ 8][5], g_alpha[ 8][6], g_alpha[ 8][7] ),
    _mm_setr_epi16( g_alpha[ 9][0], g_alpha[ 9][1], g_alpha[ 9][2], g_alpha[ 9][3], g_alpha[ 9][4], g_alpha[ 9][5], g_alpha[ 9][6], g_alpha[ 9][7] ),
    _mm_setr_epi16( g_alpha[10][0], g_alpha[10][1], g_alpha[10][2], g_alpha[10][3], g_alpha[10][4], g_alpha[10][5], g_alpha[10][6], g_alpha[10][7] ),
    _mm_setr_epi16( g_alpha[11][0], g_alpha[11][1], g_alpha[11][2], g_alpha[11][3], g_alpha[11][4], g_alpha[11][5], g_alpha[11][6], g_alpha[11][7] ),
    _mm_setr_epi16( g_alpha[12][0], g_alpha[12][1], g_alpha[12][2], g_alpha[12][3], g_alpha[12][4], g_alpha[12][5], g_alpha[12][6], g_alpha[12][7] ),
    _mm_setr_epi16( g_alpha[13][0], g_alpha[13][1], g_alpha[13][2], g_alpha[13][3], g_alpha[13][4], g_alpha[13][5], g_alpha[13][6], g_alpha[13][7] ),
    _mm_setr_epi16( g_alpha[14][0], g_alpha[14][1], g_alpha[14][2], g_alpha[14][3], g_alpha[14][4], g_alpha[14][5], g_alpha[14][6], g_alpha[14][7] ),
    _mm_setr_epi16( g_alpha[15][0], g_alpha[15][1], g_alpha[15][2], g_alpha[15][3], g_alpha[15][4], g_alpha[15][5], g_alpha[15][6], g_alpha[15][7] ),
};

const __m128i g_alphaRange_SIMD = _mm_setr_epi16(
    g_alphaRange[0],
    g_alphaRange[1],
    g_alphaRange[4],
    g_alphaRange[5],
    g_alphaRange[8],
    g_alphaRange[14],
    0,
    0 );
#endif

#ifdef __AVX2__
const __m256i g_alpha_AVX[8] = {
    _mm256_setr_epi16( g_alpha[ 0][0], g_alpha[ 1][0], g_alpha[ 2][0], g_alpha[ 3][0], g_alpha[ 4][0], g_alpha[ 5][0], g_alpha[ 6][0], g_alpha[ 7][0], g_alpha[ 8][0], g_alpha[ 9][0], g_alpha[10][0], g_alpha[11][0], g_alpha[12][0], g_alpha[13][0], g_alpha[14][0], g_alpha[15][0] ),
    _mm256_setr_epi16( g_alpha[ 0][1], g_alpha[ 1][1], g_alpha[ 2][1], g_alpha[ 3][1], g_alpha[ 4][1], g_alpha[ 5][1], g_alpha[ 6][1], g_alpha[ 7][1], g_alpha[ 8][1], g_alpha[ 9][1], g_alpha[10][1], g_alpha[11][1], g_alpha[12][1], g_alpha[13][1], g_alpha[14][1], g_alpha[15][1] ),
    _mm256_setr_epi16( g_alpha[ 0][2], g_alpha[ 1][2], g_alpha[ 2][2], g_alpha[ 3][2], g_alpha[ 4][2], g_alpha[ 5][2], g_alpha[ 6][2], g_alpha[ 7][2], g_alpha[ 8][2], g_alpha[ 9][2], g_alpha[10][2], g_alpha[11][2], g_alpha[12][2], g_alpha[13][2], g_alpha[14][2], g_alpha[15][2] ),
    _mm256_setr_epi16( g_alpha[ 0][3], g_alpha[ 1][3], g_alpha[ 2][3], g_alpha[ 3][3], g_alpha[ 4][3], g_alpha[ 5][3], g_alpha[ 6][3], g_alpha[ 7][3], g_alpha[ 8][3], g_alpha[ 9][3], g_alpha[10][3], g_alpha[11][3], g_alpha[12][3], g_alpha[13][3], g_alpha[14][3], g_alpha[15][3] ),
    _mm256_setr_epi16( g_alpha[ 0][4], g_alpha[ 1][4], g_alpha[ 2][4], g_alpha[ 3][4], g_alpha[ 4][4], g_alpha[ 5][4], g_alpha[ 6][4], g_alpha[ 7][4], g_alpha[ 8][4], g_alpha[ 9][4], g_alpha[10][4], g_alpha[11][4], g_alpha[12][4], g_alpha[13][4], g_alpha[14][4], g_alpha[15][4] ),
    _mm256_setr_epi16( g_alpha[ 0][5], g_alpha[ 1][5], g_alpha[ 2][5], g_alpha[ 3][5], g_alpha[ 4][5], g_alpha[ 5][5], g_alpha[ 6][5], g_alpha[ 7][5], g_alpha[ 8][5], g_alpha[ 9][5], g_alpha[10][5], g_alpha[11][5], g_alpha[12][5], g_alpha[13][5], g_alpha[14][5], g_alpha[15][5] ),
    _mm256_setr_epi16( g_alpha[ 0][6], g_alpha[ 1][6], g_alpha[ 2][6], g_alpha[ 3][6], g_alpha[ 4][6], g_alpha[ 5][6], g_alpha[ 6][6], g_alpha[ 7][6], g_alpha[ 8][6], g_alpha[ 9][6], g_alpha[10][6], g_alpha[11][6], g_alpha[12][6], g_alpha[13][6], g_alpha[14][6], g_alpha[15][6] ),
    _mm256_setr_epi16( g_alpha[ 0][7], g_alpha[ 1][7], g_alpha[ 2][7], g_alpha[ 3][7], g_alpha[ 4][7], g_alpha[ 5][7], g_alpha[ 6][7], g_alpha[ 7][7], g_alpha[ 8][7], g_alpha[ 9][7], g_alpha[10][7], g_alpha[11][7], g_alpha[12][7], g_alpha[13][7], g_alpha[14][7], g_alpha[15][7] ),
};

const __m256i g_alphaRange_AVX = _mm256_setr_epi16(
    g_alphaRange[ 0], g_alphaRange[ 1], g_alphaRange[ 2], g_alphaRange[ 3], g_alphaRange[ 4], g_alphaRange[ 5], g_alphaRange[ 6], g_alphaRange[ 7],
    g_alphaRange[ 8], g_alphaRange[ 9], g_alphaRange[10], g_alphaRange[11], g_alphaRange[12], g_alphaRange[13], g_alphaRange[14], g_alphaRange[15]
);
#endif

#ifdef __ARM_NEON
const int16x8_t g_table128_NEON[2] =
{
    { 2*128,   5*128,   9*128,  13*128,  18*128,  24*128,  33*128,  47*128 },
    { 8*128,  17*128,  29*128,  42*128,  60*128,  80*128, 106*128, 183*128 }
};

const int32x4_t g_table256_NEON[4] =
{
    {  2*256,   5*256,   9*256,  13*256 },
    {  8*256,  17*256,  29*256,  42*256 },
    { 18*256,  24*256,  33*256,  47*256 },
    { 60*256,  80*256, 106*256, 183*256 }
};

const int16x8_t g_alpha_NEON[16] =
{
    { -3, -6,  -9, -15, 2, 5, 8, 14 },
    { -3, -7, -10, -13, 2, 6, 9, 12 },
    { -2, -5,  -8, -13, 1, 4, 7, 12 },
    { -2, -4,  -6, -13, 1, 3, 5, 12 },
    { -3, -6,  -8, -12, 2, 5, 7, 11 },
    { -3, -7,  -9, -11, 2, 6, 8, 10 },
    { -4, -7,  -8, -11, 3, 6, 7, 10 },
    { -3, -5,  -8, -11, 2, 4, 7, 10 },
    { -2, -6,  -8, -10, 1, 5, 7,  9 },
    { -2, -5,  -8, -10, 1, 4, 7,  9 },
    { -2, -4,  -8, -10, 1, 3, 7,  9 },
    { -2, -5,  -7, -10, 1, 4, 6,  9 },
    { -3, -4,  -7, -10, 2, 3, 6,  9 },
    { -1, -2,  -3, -10, 0, 1, 2,  9 },
    { -4, -6,  -8,  -9, 3, 5, 7,  8 },
    { -3, -5,  -7,  -9, 2, 4, 6,  8 }
};

const int16x8_t g_alphaRange_NEON =
{
    (int16_t)g_alphaRange[0],
    (int16_t)g_alphaRange[1],
    (int16_t)g_alphaRange[4],
    (int16_t)g_alphaRange[5],
    (int16_t)g_alphaRange[8],
    (int16_t)g_alphaRange[14],
    0,
    0
};
#endif