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|
#include "dct-prim.h"
#if HAVE_NEON
#include <arm_neon.h>
#define X265_PRAGMA(text) _Pragma(#text)
#if defined(__clang__)
#define X265_PRAGMA_UNROLL(n) X265_PRAGMA(unroll(n))
#elif defined(__GNUC__)
#define X265_PRAGMA_UNROLL(n) X265_PRAGMA(GCC unroll (n))
#else
#define X265_PRAGMA_UNROLL(n)
#endif
extern "C" void PFX(dct16_neon)(const int16_t *src, int16_t *dst, intptr_t srcStride);
extern "C" void PFX(idct16_neon)(const int16_t *src, int16_t *dst, intptr_t dstStride);
namespace
{
using namespace X265_NS;
static void transpose_4x4x16(int16x4_t &x0, int16x4_t &x1, int16x4_t &x2, int16x4_t &x3)
{
int32x2_t s0, s1, s2, s3;
s0 = vtrn1_s32(vreinterpret_s32_s16(x0), vreinterpret_s32_s16(x2));
s1 = vtrn1_s32(vreinterpret_s32_s16(x1), vreinterpret_s32_s16(x3));
s2 = vtrn2_s32(vreinterpret_s32_s16(x0), vreinterpret_s32_s16(x2));
s3 = vtrn2_s32(vreinterpret_s32_s16(x1), vreinterpret_s32_s16(x3));
x0 = vtrn1_s16(vreinterpret_s16_s32(s0), vreinterpret_s16_s32(s1));
x1 = vtrn2_s16(vreinterpret_s16_s32(s0), vreinterpret_s16_s32(s1));
x2 = vtrn1_s16(vreinterpret_s16_s32(s2), vreinterpret_s16_s32(s3));
x3 = vtrn2_s16(vreinterpret_s16_s32(s2), vreinterpret_s16_s32(s3));
}
static int scanPosLast_opt(const uint16_t *scan, const coeff_t *coeff, uint16_t *coeffSign, uint16_t *coeffFlag,
uint8_t *coeffNum, int numSig, const uint16_t * /*scanCG4x4*/, const int /*trSize*/)
{
// This is an optimized function for scanPosLast, which removes the rmw dependency, once integrated into mainline x265, should replace reference implementation
// For clarity, left the original reference code in comments
int scanPosLast = 0;
uint16_t cSign = 0;
uint16_t cFlag = 0;
uint8_t cNum = 0;
uint32_t prevcgIdx = 0;
do
{
const uint32_t cgIdx = (uint32_t)scanPosLast >> MLS_CG_SIZE;
const uint32_t posLast = scan[scanPosLast];
const int curCoeff = coeff[posLast];
const uint32_t isNZCoeff = (curCoeff != 0);
/*
NOTE: the new algorithm is complicated, so I keep reference code here
uint32_t posy = posLast >> log2TrSize;
uint32_t posx = posLast - (posy << log2TrSize);
uint32_t blkIdx0 = ((posy >> MLS_CG_LOG2_SIZE) << codingParameters.log2TrSizeCG) + (posx >> MLS_CG_LOG2_SIZE);
const uint32_t blkIdx = ((posLast >> (2 * MLS_CG_LOG2_SIZE)) & ~maskPosXY) + ((posLast >> MLS_CG_LOG2_SIZE) & maskPosXY);
sigCoeffGroupFlag64 |= ((uint64_t)isNZCoeff << blkIdx);
*/
// get L1 sig map
numSig -= isNZCoeff;
if (scanPosLast % (1 << MLS_CG_SIZE) == 0)
{
coeffSign[prevcgIdx] = cSign;
coeffFlag[prevcgIdx] = cFlag;
coeffNum[prevcgIdx] = cNum;
cSign = 0;
cFlag = 0;
cNum = 0;
}
// TODO: optimize by instruction BTS
cSign += (uint16_t)(((curCoeff < 0) ? 1 : 0) << cNum);
cFlag = (cFlag << 1) + (uint16_t)isNZCoeff;
cNum += (uint8_t)isNZCoeff;
prevcgIdx = cgIdx;
scanPosLast++;
}
while (numSig > 0);
coeffSign[prevcgIdx] = cSign;
coeffFlag[prevcgIdx] = cFlag;
coeffNum[prevcgIdx] = cNum;
return scanPosLast - 1;
}
#if (MLS_CG_SIZE == 4)
template<int log2TrSize>
static void nonPsyRdoQuant_neon(int16_t *m_resiDctCoeff, int64_t *costUncoded, int64_t *totalUncodedCost,
int64_t *totalRdCost, uint32_t blkPos)
{
const int transformShift = MAX_TR_DYNAMIC_RANGE - X265_DEPTH -
log2TrSize; /* Represents scaling through forward transform */
const int scaleBits = SCALE_BITS - 2 * transformShift;
const uint32_t trSize = 1 << log2TrSize;
int64x2_t vcost_sum_0 = vdupq_n_s64(0);
int64x2_t vcost_sum_1 = vdupq_n_s64(0);
for (int y = 0; y < MLS_CG_SIZE; y++)
{
int16x4_t in = vld1_s16(&m_resiDctCoeff[blkPos]);
int32x4_t mul = vmull_s16(in, in);
int64x2_t cost0, cost1;
cost0 = vshll_n_s32(vget_low_s32(mul), scaleBits);
cost1 = vshll_high_n_s32(mul, scaleBits);
vst1q_s64(&costUncoded[blkPos + 0], cost0);
vst1q_s64(&costUncoded[blkPos + 2], cost1);
vcost_sum_0 = vaddq_s64(vcost_sum_0, cost0);
vcost_sum_1 = vaddq_s64(vcost_sum_1, cost1);
blkPos += trSize;
}
int64_t sum = vaddvq_s64(vaddq_s64(vcost_sum_0, vcost_sum_1));
*totalUncodedCost += sum;
*totalRdCost += sum;
}
template<int log2TrSize>
static void psyRdoQuant_neon(int16_t *m_resiDctCoeff, int16_t *m_fencDctCoeff, int64_t *costUncoded,
int64_t *totalUncodedCost, int64_t *totalRdCost, int64_t *psyScale, uint32_t blkPos)
{
const int transformShift = MAX_TR_DYNAMIC_RANGE - X265_DEPTH -
log2TrSize; /* Represents scaling through forward transform */
const int scaleBits = SCALE_BITS - 2 * transformShift;
const uint32_t trSize = 1 << log2TrSize;
//using preprocessor to bypass clang bug
const int max = X265_MAX(0, (2 * transformShift + 1));
int64x2_t vcost_sum_0 = vdupq_n_s64(0);
int64x2_t vcost_sum_1 = vdupq_n_s64(0);
int32x4_t vpsy = vdupq_n_s32(*psyScale);
for (int y = 0; y < MLS_CG_SIZE; y++)
{
int32x4_t signCoef = vmovl_s16(vld1_s16(&m_resiDctCoeff[blkPos]));
int32x4_t fencCoef = vmovl_s16(vld1_s16(&m_fencDctCoeff[blkPos]));
int32x4_t predictedCoef = vsubq_s32(fencCoef, signCoef);
int64x2_t cost0, cost1;
cost0 = vmull_s32(vget_low_s32(signCoef), vget_low_s32(signCoef));
cost1 = vmull_high_s32(signCoef, signCoef);
cost0 = vshlq_n_s64(cost0, scaleBits);
cost1 = vshlq_n_s64(cost1, scaleBits);
int64x2_t neg0 = vmull_s32(vget_low_s32(predictedCoef), vget_low_s32(vpsy));
int64x2_t neg1 = vmull_high_s32(predictedCoef, vpsy);
if (max > 0)
{
int64x2_t shift = vdupq_n_s64(-max);
neg0 = vshlq_s64(neg0, shift);
neg1 = vshlq_s64(neg1, shift);
}
cost0 = vsubq_s64(cost0, neg0);
cost1 = vsubq_s64(cost1, neg1);
vst1q_s64(&costUncoded[blkPos + 0], cost0);
vst1q_s64(&costUncoded[blkPos + 2], cost1);
vcost_sum_0 = vaddq_s64(vcost_sum_0, cost0);
vcost_sum_1 = vaddq_s64(vcost_sum_1, cost1);
blkPos += trSize;
}
int64_t sum = vaddvq_s64(vaddq_s64(vcost_sum_0, vcost_sum_1));
*totalUncodedCost += sum;
*totalRdCost += sum;
}
#else
#error "MLS_CG_SIZE must be 4 for neon version"
#endif
template<int trSize>
int count_nonzero_neon(const int16_t *quantCoeff)
{
X265_CHECK(((intptr_t)quantCoeff & 15) == 0, "quant buffer not aligned\n");
int count = 0;
int16x8_t vcount = vdupq_n_s16(0);
const int numCoeff = trSize * trSize;
int i = 0;
for (; (i + 8) <= numCoeff; i += 8)
{
int16x8_t in = vld1q_s16(&quantCoeff[i]);
uint16x8_t tst = vtstq_s16(in, in);
vcount = vaddq_s16(vcount, vreinterpretq_s16_u16(tst));
}
for (; i < numCoeff; i++)
{
count += quantCoeff[i] != 0;
}
return count - vaddvq_s16(vcount);
}
template<int trSize>
uint32_t copy_count_neon(int16_t *coeff, const int16_t *residual, intptr_t resiStride)
{
uint32_t numSig = 0;
int16x8_t vcount = vdupq_n_s16(0);
for (int k = 0; k < trSize; k++)
{
int j = 0;
for (; (j + 8) <= trSize; j += 8)
{
int16x8_t in = vld1q_s16(&residual[j]);
vst1q_s16(&coeff[j], in);
uint16x8_t tst = vtstq_s16(in, in);
vcount = vaddq_s16(vcount, vreinterpretq_s16_u16(tst));
}
for (; j < trSize; j++)
{
coeff[j] = residual[j];
numSig += (residual[j] != 0);
}
residual += resiStride;
coeff += trSize;
}
return numSig - vaddvq_s16(vcount);
}
template<int shift>
static inline void partialButterfly16_neon(const int16_t *src, int16_t *dst)
{
const int line = 16;
int16x8_t O[line];
int32x4_t EO[line];
int32x4_t EEE[line];
int32x4_t EEO[line];
for (int i = 0; i < line; i += 2)
{
int16x8_t s0_lo = vld1q_s16(src + i * line);
int16x8_t s0_hi = rev16(vld1q_s16(src + i * line + 8));
int16x8_t s1_lo = vld1q_s16(src + (i + 1) * line);
int16x8_t s1_hi = rev16(vld1q_s16(src + (i + 1) * line + 8));
int32x4_t E0[2];
E0[0] = vaddl_s16(vget_low_s16(s0_lo), vget_low_s16(s0_hi));
E0[1] = vaddl_s16(vget_high_s16(s0_lo), vget_high_s16(s0_hi));
int32x4_t E1[2];
E1[0] = vaddl_s16(vget_low_s16(s1_lo), vget_low_s16(s1_hi));
E1[1] = vaddl_s16(vget_high_s16(s1_lo), vget_high_s16(s1_hi));
O[i + 0] = vsubq_s16(s0_lo, s0_hi);
O[i + 1] = vsubq_s16(s1_lo, s1_hi);
int32x4_t EE0 = vaddq_s32(E0[0], rev32(E0[1]));
int32x4_t EE1 = vaddq_s32(E1[0], rev32(E1[1]));
EO[i + 0] = vsubq_s32(E0[0], rev32(E0[1]));
EO[i + 1] = vsubq_s32(E1[0], rev32(E1[1]));
int32x4_t t0 = vreinterpretq_s32_s64(
vzip1q_s64(vreinterpretq_s64_s32(EE0), vreinterpretq_s64_s32(EE1)));
int32x4_t t1 = vrev64q_s32(vreinterpretq_s32_s64(vzip2q_s64(
vreinterpretq_s64_s32(EE0), vreinterpretq_s64_s32(EE1))));
EEE[i / 2] = vaddq_s32(t0, t1);
EEO[i / 2] = vsubq_s32(t0, t1);
}
for (int i = 0; i < line; i += 4)
{
for (int k = 1; k < 16; k += 2)
{
int16x8_t c0_c4 = vld1q_s16(&g_t16[k][0]);
int32x4_t t0 = vmull_s16(vget_low_s16(c0_c4),
vget_low_s16(O[i + 0]));
int32x4_t t1 = vmull_s16(vget_low_s16(c0_c4),
vget_low_s16(O[i + 1]));
int32x4_t t2 = vmull_s16(vget_low_s16(c0_c4),
vget_low_s16(O[i + 2]));
int32x4_t t3 = vmull_s16(vget_low_s16(c0_c4),
vget_low_s16(O[i + 3]));
t0 = vmlal_s16(t0, vget_high_s16(c0_c4), vget_high_s16(O[i + 0]));
t1 = vmlal_s16(t1, vget_high_s16(c0_c4), vget_high_s16(O[i + 1]));
t2 = vmlal_s16(t2, vget_high_s16(c0_c4), vget_high_s16(O[i + 2]));
t3 = vmlal_s16(t3, vget_high_s16(c0_c4), vget_high_s16(O[i + 3]));
int32x4_t t = vpaddq_s32(vpaddq_s32(t0, t1), vpaddq_s32(t2, t3));
int16x4_t res = vrshrn_n_s32(t, shift);
vst1_s16(dst + k * line, res);
}
for (int k = 2; k < 16; k += 4)
{
int32x4_t c0 = vmovl_s16(vld1_s16(&g_t16[k][0]));
int32x4_t t0 = vmulq_s32(c0, EO[i + 0]);
int32x4_t t1 = vmulq_s32(c0, EO[i + 1]);
int32x4_t t2 = vmulq_s32(c0, EO[i + 2]);
int32x4_t t3 = vmulq_s32(c0, EO[i + 3]);
int32x4_t t = vpaddq_s32(vpaddq_s32(t0, t1), vpaddq_s32(t2, t3));
int16x4_t res = vrshrn_n_s32(t, shift);
vst1_s16(dst + k * line, res);
}
int32x4_t c0 = vld1q_s32(t8_even[0]);
int32x4_t c4 = vld1q_s32(t8_even[1]);
int32x4_t c8 = vld1q_s32(t8_even[2]);
int32x4_t c12 = vld1q_s32(t8_even[3]);
int32x4_t t0 = vpaddq_s32(EEE[i / 2 + 0], EEE[i / 2 + 1]);
int32x4_t t1 = vmulq_s32(c0, t0);
int16x4_t res0 = vrshrn_n_s32(t1, shift);
vst1_s16(dst + 0 * line, res0);
int32x4_t t2 = vmulq_s32(c4, EEO[i / 2 + 0]);
int32x4_t t3 = vmulq_s32(c4, EEO[i / 2 + 1]);
int16x4_t res4 = vrshrn_n_s32(vpaddq_s32(t2, t3), shift);
vst1_s16(dst + 4 * line, res4);
int32x4_t t4 = vmulq_s32(c8, EEE[i / 2 + 0]);
int32x4_t t5 = vmulq_s32(c8, EEE[i / 2 + 1]);
int16x4_t res8 = vrshrn_n_s32(vpaddq_s32(t4, t5), shift);
vst1_s16(dst + 8 * line, res8);
int32x4_t t6 = vmulq_s32(c12, EEO[i / 2 + 0]);
int32x4_t t7 = vmulq_s32(c12, EEO[i / 2 + 1]);
int16x4_t res12 = vrshrn_n_s32(vpaddq_s32(t6, t7), shift);
vst1_s16(dst + 12 * line, res12);
dst += 4;
}
}
template<int shift>
static inline void partialButterfly32_neon(const int16_t *src, int16_t *dst)
{
const int line = 32;
int16x8_t O[line][2];
int32x4_t EO[line][2];
int32x4_t EEO[line];
int32x4_t EEEE[line / 2];
int32x4_t EEEO[line / 2];
for (int i = 0; i < line; i += 2)
{
int16x8x4_t in_lo = vld1q_s16_x4(src + (i + 0) * line);
in_lo.val[2] = rev16(in_lo.val[2]);
in_lo.val[3] = rev16(in_lo.val[3]);
int16x8x4_t in_hi = vld1q_s16_x4(src + (i + 1) * line);
in_hi.val[2] = rev16(in_hi.val[2]);
in_hi.val[3] = rev16(in_hi.val[3]);
int32x4_t E0[4];
E0[0] = vaddl_s16(vget_low_s16(in_lo.val[0]),
vget_low_s16(in_lo.val[3]));
E0[1] = vaddl_s16(vget_high_s16(in_lo.val[0]),
vget_high_s16(in_lo.val[3]));
E0[2] = vaddl_s16(vget_low_s16(in_lo.val[1]),
vget_low_s16(in_lo.val[2]));
E0[3] = vaddl_s16(vget_high_s16(in_lo.val[1]),
vget_high_s16(in_lo.val[2]));
int32x4_t E1[4];
E1[0] = vaddl_s16(vget_low_s16(in_hi.val[0]),
vget_low_s16(in_hi.val[3]));
E1[1] = vaddl_s16(vget_high_s16(in_hi.val[0]),
vget_high_s16(in_hi.val[3]));
E1[2] = vaddl_s16(vget_low_s16(in_hi.val[1]),
vget_low_s16(in_hi.val[2]));
E1[3] = vaddl_s16(vget_high_s16(in_hi.val[1]),
vget_high_s16(in_hi.val[2]));
O[i + 0][0] = vsubq_s16(in_lo.val[0], in_lo.val[3]);
O[i + 0][1] = vsubq_s16(in_lo.val[1], in_lo.val[2]);
O[i + 1][0] = vsubq_s16(in_hi.val[0], in_hi.val[3]);
O[i + 1][1] = vsubq_s16(in_hi.val[1], in_hi.val[2]);
int32x4_t EE0[2];
E0[3] = rev32(E0[3]);
E0[2] = rev32(E0[2]);
EE0[0] = vaddq_s32(E0[0], E0[3]);
EE0[1] = vaddq_s32(E0[1], E0[2]);
EO[i + 0][0] = vsubq_s32(E0[0], E0[3]);
EO[i + 0][1] = vsubq_s32(E0[1], E0[2]);
int32x4_t EE1[2];
E1[3] = rev32(E1[3]);
E1[2] = rev32(E1[2]);
EE1[0] = vaddq_s32(E1[0], E1[3]);
EE1[1] = vaddq_s32(E1[1], E1[2]);
EO[i + 1][0] = vsubq_s32(E1[0], E1[3]);
EO[i + 1][1] = vsubq_s32(E1[1], E1[2]);
int32x4_t EEE0;
EE0[1] = rev32(EE0[1]);
EEE0 = vaddq_s32(EE0[0], EE0[1]);
EEO[i + 0] = vsubq_s32(EE0[0], EE0[1]);
int32x4_t EEE1;
EE1[1] = rev32(EE1[1]);
EEE1 = vaddq_s32(EE1[0], EE1[1]);
EEO[i + 1] = vsubq_s32(EE1[0], EE1[1]);
int32x4_t t0 = vreinterpretq_s32_s64(
vzip1q_s64(vreinterpretq_s64_s32(EEE0),
vreinterpretq_s64_s32(EEE1)));
int32x4_t t1 = vrev64q_s32(vreinterpretq_s32_s64(
vzip2q_s64(vreinterpretq_s64_s32(EEE0),
vreinterpretq_s64_s32(EEE1))));
EEEE[i / 2] = vaddq_s32(t0, t1);
EEEO[i / 2] = vsubq_s32(t0, t1);
}
for (int k = 1; k < 32; k += 2)
{
int16_t *d = dst + k * line;
int16x8_t c0_c1 = vld1q_s16(&g_t32[k][0]);
int16x8_t c2_c3 = vld1q_s16(&g_t32[k][8]);
int16x4_t c0 = vget_low_s16(c0_c1);
int16x4_t c1 = vget_high_s16(c0_c1);
int16x4_t c2 = vget_low_s16(c2_c3);
int16x4_t c3 = vget_high_s16(c2_c3);
for (int i = 0; i < line; i += 4)
{
int32x4_t t[4];
for (int j = 0; j < 4; ++j) {
t[j] = vmull_s16(c0, vget_low_s16(O[i + j][0]));
t[j] = vmlal_s16(t[j], c1, vget_high_s16(O[i + j][0]));
t[j] = vmlal_s16(t[j], c2, vget_low_s16(O[i + j][1]));
t[j] = vmlal_s16(t[j], c3, vget_high_s16(O[i + j][1]));
}
int32x4_t t0123 = vpaddq_s32(vpaddq_s32(t[0], t[1]),
vpaddq_s32(t[2], t[3]));
int16x4_t res = vrshrn_n_s32(t0123, shift);
vst1_s16(d, res);
d += 4;
}
}
for (int k = 2; k < 32; k += 4)
{
int16_t *d = dst + k * line;
int32x4_t c0 = vmovl_s16(vld1_s16(&g_t32[k][0]));
int32x4_t c1 = vmovl_s16(vld1_s16(&g_t32[k][4]));
for (int i = 0; i < line; i += 4)
{
int32x4_t t[4];
for (int j = 0; j < 4; ++j) {
t[j] = vmulq_s32(c0, EO[i + j][0]);
t[j] = vmlaq_s32(t[j], c1, EO[i + j][1]);
}
int32x4_t t0123 = vpaddq_s32(vpaddq_s32(t[0], t[1]),
vpaddq_s32(t[2], t[3]));
int16x4_t res = vrshrn_n_s32(t0123, shift);
vst1_s16(d, res);
d += 4;
}
}
for (int k = 4; k < 32; k += 8)
{
int16_t *d = dst + k * line;
int32x4_t c = vmovl_s16(vld1_s16(&g_t32[k][0]));
for (int i = 0; i < line; i += 4)
{
int32x4_t t0 = vmulq_s32(c, EEO[i + 0]);
int32x4_t t1 = vmulq_s32(c, EEO[i + 1]);
int32x4_t t2 = vmulq_s32(c, EEO[i + 2]);
int32x4_t t3 = vmulq_s32(c, EEO[i + 3]);
int32x4_t t = vpaddq_s32(vpaddq_s32(t0, t1), vpaddq_s32(t2, t3));
int16x4_t res = vrshrn_n_s32(t, shift);
vst1_s16(d, res);
d += 4;
}
}
int32x4_t c0 = vld1q_s32(t8_even[0]);
int32x4_t c8 = vld1q_s32(t8_even[1]);
int32x4_t c16 = vld1q_s32(t8_even[2]);
int32x4_t c24 = vld1q_s32(t8_even[3]);
for (int i = 0; i < line; i += 4)
{
int32x4_t t0 = vpaddq_s32(EEEE[i / 2 + 0], EEEE[i / 2 + 1]);
int32x4_t t1 = vmulq_s32(c0, t0);
int16x4_t res0 = vrshrn_n_s32(t1, shift);
vst1_s16(dst + 0 * line, res0);
int32x4_t t2 = vmulq_s32(c8, EEEO[i / 2 + 0]);
int32x4_t t3 = vmulq_s32(c8, EEEO[i / 2 + 1]);
int16x4_t res8 = vrshrn_n_s32(vpaddq_s32(t2, t3), shift);
vst1_s16(dst + 8 * line, res8);
int32x4_t t4 = vmulq_s32(c16, EEEE[i / 2 + 0]);
int32x4_t t5 = vmulq_s32(c16, EEEE[i / 2 + 1]);
int16x4_t res16 = vrshrn_n_s32(vpaddq_s32(t4, t5), shift);
vst1_s16(dst + 16 * line, res16);
int32x4_t t6 = vmulq_s32(c24, EEEO[i / 2 + 0]);
int32x4_t t7 = vmulq_s32(c24, EEEO[i / 2 + 1]);
int16x4_t res24 = vrshrn_n_s32(vpaddq_s32(t6, t7), shift);
vst1_s16(dst + 24 * line, res24);
dst += 4;
}
}
template<int shift>
static inline void partialButterfly8_neon(const int16_t *src, int16_t *dst)
{
const int line = 8;
int16x4_t O[line];
int32x4_t EE[line / 2];
int32x4_t EO[line / 2];
for (int i = 0; i < line; i += 2)
{
int16x4_t s0_lo = vld1_s16(src + i * line);
int16x4_t s0_hi = vrev64_s16(vld1_s16(src + i * line + 4));
int16x4_t s1_lo = vld1_s16(src + (i + 1) * line);
int16x4_t s1_hi = vrev64_s16(vld1_s16(src + (i + 1) * line + 4));
int32x4_t E0 = vaddl_s16(s0_lo, s0_hi);
int32x4_t E1 = vaddl_s16(s1_lo, s1_hi);
O[i + 0] = vsub_s16(s0_lo, s0_hi);
O[i + 1] = vsub_s16(s1_lo, s1_hi);
int32x4_t t0 = vreinterpretq_s32_s64(
vzip1q_s64(vreinterpretq_s64_s32(E0), vreinterpretq_s64_s32(E1)));
int32x4_t t1 = vrev64q_s32(vreinterpretq_s32_s64(
vzip2q_s64(vreinterpretq_s64_s32(E0), vreinterpretq_s64_s32(E1))));
EE[i / 2] = vaddq_s32(t0, t1);
EO[i / 2] = vsubq_s32(t0, t1);
}
int16_t *d = dst;
int32x4_t c0 = vld1q_s32(t8_even[0]);
int32x4_t c2 = vld1q_s32(t8_even[1]);
int32x4_t c4 = vld1q_s32(t8_even[2]);
int32x4_t c6 = vld1q_s32(t8_even[3]);
int16x4_t c1 = vld1_s16(g_t8[1]);
int16x4_t c3 = vld1_s16(g_t8[3]);
int16x4_t c5 = vld1_s16(g_t8[5]);
int16x4_t c7 = vld1_s16(g_t8[7]);
for (int j = 0; j < line; j += 4)
{
// O
int32x4_t t01 = vpaddq_s32(vmull_s16(c1, O[j + 0]),
vmull_s16(c1, O[j + 1]));
int32x4_t t23 = vpaddq_s32(vmull_s16(c1, O[j + 2]),
vmull_s16(c1, O[j + 3]));
int16x4_t res1 = vrshrn_n_s32(vpaddq_s32(t01, t23), shift);
vst1_s16(d + 1 * line, res1);
t01 = vpaddq_s32(vmull_s16(c3, O[j + 0]), vmull_s16(c3, O[j + 1]));
t23 = vpaddq_s32(vmull_s16(c3, O[j + 2]), vmull_s16(c3, O[j + 3]));
int16x4_t res3 = vrshrn_n_s32(vpaddq_s32(t01, t23), shift);
vst1_s16(d + 3 * line, res3);
t01 = vpaddq_s32(vmull_s16(c5, O[j + 0]), vmull_s16(c5, O[j + 1]));
t23 = vpaddq_s32(vmull_s16(c5, O[j + 2]), vmull_s16(c5, O[j + 3]));
int16x4_t res5 = vrshrn_n_s32(vpaddq_s32(t01, t23), shift);
vst1_s16(d + 5 * line, res5);
t01 = vpaddq_s32(vmull_s16(c7, O[j + 0]), vmull_s16(c7, O[j + 1]));
t23 = vpaddq_s32(vmull_s16(c7, O[j + 2]), vmull_s16(c7, O[j + 3]));
int16x4_t res7 = vrshrn_n_s32(vpaddq_s32(t01, t23), shift);
vst1_s16(d + 7 * line, res7);
// EE and EO
int32x4_t t0 = vpaddq_s32(EE[j / 2 + 0], EE[j / 2 + 1]);
int32x4_t t1 = vmulq_s32(c0, t0);
int16x4_t res0 = vrshrn_n_s32(t1, shift);
vst1_s16(d + 0 * line, res0);
int32x4_t t2 = vmulq_s32(c2, EO[j / 2 + 0]);
int32x4_t t3 = vmulq_s32(c2, EO[j / 2 + 1]);
int16x4_t res2 = vrshrn_n_s32(vpaddq_s32(t2, t3), shift);
vst1_s16(d + 2 * line, res2);
int32x4_t t4 = vmulq_s32(c4, EE[j / 2 + 0]);
int32x4_t t5 = vmulq_s32(c4, EE[j / 2 + 1]);
int16x4_t res4 = vrshrn_n_s32(vpaddq_s32(t4, t5), shift);
vst1_s16(d + 4 * line, res4);
int32x4_t t6 = vmulq_s32(c6, EO[j / 2 + 0]);
int32x4_t t7 = vmulq_s32(c6, EO[j / 2 + 1]);
int16x4_t res6 = vrshrn_n_s32(vpaddq_s32(t6, t7), shift);
vst1_s16(d + 6 * line, res6);
d += 4;
}
}
static void partialButterflyInverse4(const int16_t *src, int16_t *dst, int shift, int line)
{
int j;
int E[2], O[2];
int add = 1 << (shift - 1);
for (j = 0; j < line; j++)
{
/* Utilizing symmetry properties to the maximum to minimize the number of multiplications */
O[0] = g_t4[1][0] * src[line] + g_t4[3][0] * src[3 * line];
O[1] = g_t4[1][1] * src[line] + g_t4[3][1] * src[3 * line];
E[0] = g_t4[0][0] * src[0] + g_t4[2][0] * src[2 * line];
E[1] = g_t4[0][1] * src[0] + g_t4[2][1] * src[2 * line];
/* Combining even and odd terms at each hierarchy levels to calculate the final spatial domain vector */
dst[0] = (int16_t)(x265_clip3(-32768, 32767, (E[0] + O[0] + add) >> shift));
dst[1] = (int16_t)(x265_clip3(-32768, 32767, (E[1] + O[1] + add) >> shift));
dst[2] = (int16_t)(x265_clip3(-32768, 32767, (E[1] - O[1] + add) >> shift));
dst[3] = (int16_t)(x265_clip3(-32768, 32767, (E[0] - O[0] + add) >> shift));
src++;
dst += 4;
}
}
static void partialButterflyInverse16_neon(const int16_t *src, int16_t *orig_dst, int shift, int line)
{
#define FMAK(x,l) s[l] = vmlal_lane_s16(s[l],vld1_s16(&src[x*line]),vld1_s16(&g_t16[x][k]),l);
#define MULK(x,l) vmull_lane_s16(vld1_s16(&src[x*line]),vld1_s16(&g_t16[x][k]),l);
#define ODD3_15(k) FMAK(3,k);FMAK(5,k);FMAK(7,k);FMAK(9,k);FMAK(11,k);FMAK(13,k);FMAK(15,k);
#define EVEN6_14_STEP4(k) FMAK(6,k);FMAK(10,k);FMAK(14,k);
int j, k;
int32x4_t E[8], O[8];
int32x4_t EE[4], EO[4];
int32x4_t EEE[2], EEO[2];
const int add = 1 << (shift - 1);
X265_PRAGMA_UNROLL(4)
for (j = 0; j < line; j += 4)
{
/* Utilizing symmetry properties to the maximum to minimize the number of multiplications */
X265_PRAGMA_UNROLL(2)
for (k = 0; k < 2; k++)
{
int32x4_t s;
s = vmull_s16(vdup_n_s16(g_t16[4][k]), vld1_s16(&src[4 * line]));
EEO[k] = vmlal_s16(s, vdup_n_s16(g_t16[12][k]),
vld1_s16(&src[12 * line]));
s = vmull_s16(vdup_n_s16(g_t16[0][k]), vld1_s16(&src[0 * line]));
EEE[k] = vmlal_s16(s, vdup_n_s16(g_t16[8][k]),
vld1_s16(&src[8 * line]));
}
/* Combining even and odd terms at each hierarchy levels to calculate the final spatial domain vector */
EE[0] = vaddq_s32(EEE[0] , EEO[0]);
EE[2] = vsubq_s32(EEE[1] , EEO[1]);
EE[1] = vaddq_s32(EEE[1] , EEO[1]);
EE[3] = vsubq_s32(EEE[0] , EEO[0]);
X265_PRAGMA_UNROLL(1)
for (k = 0; k < 4; k += 4)
{
int32x4_t s[4];
s[0] = MULK(2, 0);
s[1] = MULK(2, 1);
s[2] = MULK(2, 2);
s[3] = MULK(2, 3);
EVEN6_14_STEP4(0);
EVEN6_14_STEP4(1);
EVEN6_14_STEP4(2);
EVEN6_14_STEP4(3);
EO[k] = s[0];
EO[k + 1] = s[1];
EO[k + 2] = s[2];
EO[k + 3] = s[3];
}
static const int32x4_t min = vdupq_n_s32(-32768);
static const int32x4_t max = vdupq_n_s32(32767);
const int32x4_t minus_shift = vdupq_n_s32(-shift);
X265_PRAGMA_UNROLL(4)
for (k = 0; k < 4; k++)
{
E[k] = vaddq_s32(EE[k] , EO[k]);
E[k + 4] = vsubq_s32(EE[3 - k] , EO[3 - k]);
}
X265_PRAGMA_UNROLL(2)
for (k = 0; k < 8; k += 4)
{
int32x4_t s[4];
s[0] = MULK(1, 0);
s[1] = MULK(1, 1);
s[2] = MULK(1, 2);
s[3] = MULK(1, 3);
ODD3_15(0);
ODD3_15(1);
ODD3_15(2);
ODD3_15(3);
O[k] = s[0];
O[k + 1] = s[1];
O[k + 2] = s[2];
O[k + 3] = s[3];
int32x4_t t;
int16x4_t x0, x1, x2, x3;
E[k] = vaddq_s32(vdupq_n_s32(add), E[k]);
t = vaddq_s32(E[k], O[k]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x0 = vmovn_s32(t);
E[k + 1] = vaddq_s32(vdupq_n_s32(add), E[k + 1]);
t = vaddq_s32(E[k + 1], O[k + 1]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x1 = vmovn_s32(t);
E[k + 2] = vaddq_s32(vdupq_n_s32(add), E[k + 2]);
t = vaddq_s32(E[k + 2], O[k + 2]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x2 = vmovn_s32(t);
E[k + 3] = vaddq_s32(vdupq_n_s32(add), E[k + 3]);
t = vaddq_s32(E[k + 3], O[k + 3]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x3 = vmovn_s32(t);
transpose_4x4x16(x0, x1, x2, x3);
vst1_s16(&orig_dst[0 * 16 + k], x0);
vst1_s16(&orig_dst[1 * 16 + k], x1);
vst1_s16(&orig_dst[2 * 16 + k], x2);
vst1_s16(&orig_dst[3 * 16 + k], x3);
}
X265_PRAGMA_UNROLL(2)
for (k = 0; k < 8; k += 4)
{
int32x4_t t;
int16x4_t x0, x1, x2, x3;
t = vsubq_s32(E[7 - k], O[7 - k]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x0 = vmovn_s32(t);
t = vsubq_s32(E[6 - k], O[6 - k]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x1 = vmovn_s32(t);
t = vsubq_s32(E[5 - k], O[5 - k]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x2 = vmovn_s32(t);
t = vsubq_s32(E[4 - k], O[4 - k]);
t = vshlq_s32(t, minus_shift);
t = vmaxq_s32(t, min);
t = vminq_s32(t, max);
x3 = vmovn_s32(t);
transpose_4x4x16(x0, x1, x2, x3);
vst1_s16(&orig_dst[0 * 16 + k + 8], x0);
vst1_s16(&orig_dst[1 * 16 + k + 8], x1);
vst1_s16(&orig_dst[2 * 16 + k + 8], x2);
vst1_s16(&orig_dst[3 * 16 + k + 8], x3);
}
orig_dst += 4 * 16;
src += 4;
}
#undef MUL
#undef FMA
#undef FMAK
#undef MULK
#undef ODD3_15
#undef EVEN6_14_STEP4
}
static void partialButterflyInverse32_neon(const int16_t *src, int16_t *orig_dst, int shift, int line)
{
#define MUL(x) vmull_s16(vdup_n_s16(g_t32[x][k]),vld1_s16(&src[x*line]));
#define FMA(x) s = vmlal_s16(s,vdup_n_s16(g_t32[x][k]),vld1_s16(&src[x*line]));
#define FMAK(x,l) s[l] = vmlal_lane_s16(s[l],vld1_s16(&src[x*line]),vld1_s16(&g_t32[x][k]),l);
#define MULK(x,l) vmull_lane_s16(vld1_s16(&src[x*line]),vld1_s16(&g_t32[x][k]),l);
#define ODD31(k) FMAK(3,k);FMAK(5,k);FMAK(7,k);FMAK(9,k);FMAK(11,k);FMAK(13,k);FMAK(15,k);FMAK(17,k);FMAK(19,k);FMAK(21,k);FMAK(23,k);FMAK(25,k);FMAK(27,k);FMAK(29,k);FMAK(31,k);
#define ODD15(k) FMAK(6,k);FMAK(10,k);FMAK(14,k);FMAK(18,k);FMAK(22,k);FMAK(26,k);FMAK(30,k);
#define ODD7(k) FMAK(12,k);FMAK(20,k);FMAK(28,k);
int j, k;
int32x4_t E[16], O[16];
int32x4_t EE[8], EO[8];
int32x4_t EEE[4], EEO[4];
int32x4_t EEEE[2], EEEO[2];
int16x4_t dst[32];
int add = 1 << (shift - 1);
X265_PRAGMA_UNROLL(8)
for (j = 0; j < line; j += 4)
{
X265_PRAGMA_UNROLL(4)
for (k = 0; k < 16; k += 4)
{
int32x4_t s[4];
s[0] = MULK(1, 0);
s[1] = MULK(1, 1);
s[2] = MULK(1, 2);
s[3] = MULK(1, 3);
ODD31(0);
ODD31(1);
ODD31(2);
ODD31(3);
O[k] = s[0];
O[k + 1] = s[1];
O[k + 2] = s[2];
O[k + 3] = s[3];
}
X265_PRAGMA_UNROLL(2)
for (k = 0; k < 8; k += 4)
{
int32x4_t s[4];
s[0] = MULK(2, 0);
s[1] = MULK(2, 1);
s[2] = MULK(2, 2);
s[3] = MULK(2, 3);
ODD15(0);
ODD15(1);
ODD15(2);
ODD15(3);
EO[k] = s[0];
EO[k + 1] = s[1];
EO[k + 2] = s[2];
EO[k + 3] = s[3];
}
for (k = 0; k < 4; k += 4)
{
int32x4_t s[4];
s[0] = MULK(4, 0);
s[1] = MULK(4, 1);
s[2] = MULK(4, 2);
s[3] = MULK(4, 3);
ODD7(0);
ODD7(1);
ODD7(2);
ODD7(3);
EEO[k] = s[0];
EEO[k + 1] = s[1];
EEO[k + 2] = s[2];
EEO[k + 3] = s[3];
}
X265_PRAGMA_UNROLL(2)
for (k = 0; k < 2; k++)
{
int32x4_t s;
s = MUL(8);
EEEO[k] = FMA(24);
s = MUL(0);
EEEE[k] = FMA(16);
}
/* Combining even and odd terms at each hierarchy levels to calculate the final spatial domain vector */
EEE[0] = vaddq_s32(EEEE[0], EEEO[0]);
EEE[3] = vsubq_s32(EEEE[0], EEEO[0]);
EEE[1] = vaddq_s32(EEEE[1], EEEO[1]);
EEE[2] = vsubq_s32(EEEE[1], EEEO[1]);
X265_PRAGMA_UNROLL(4)
for (k = 0; k < 4; k++)
{
EE[k] = vaddq_s32(EEE[k], EEO[k]);
EE[k + 4] = vsubq_s32((EEE[3 - k]), (EEO[3 - k]));
}
X265_PRAGMA_UNROLL(8)
for (k = 0; k < 8; k++)
{
E[k] = vaddq_s32(EE[k], EO[k]);
E[k + 8] = vsubq_s32((EE[7 - k]), (EO[7 - k]));
}
static const int32x4_t min = vdupq_n_s32(-32768);
static const int32x4_t max = vdupq_n_s32(32767);
X265_PRAGMA_UNROLL(16)
for (k = 0; k < 16; k++)
{
int32x4_t adde = vaddq_s32(vdupq_n_s32(add), E[k]);
int32x4_t s = vaddq_s32(adde, O[k]);
s = vshlq_s32(s, vdupq_n_s32(-shift));
s = vmaxq_s32(s, min);
s = vminq_s32(s, max);
dst[k] = vmovn_s32(s);
adde = vaddq_s32(vdupq_n_s32(add), (E[15 - k]));
s = vsubq_s32(adde, (O[15 - k]));
s = vshlq_s32(s, vdupq_n_s32(-shift));
s = vmaxq_s32(s, min);
s = vminq_s32(s, max);
dst[k + 16] = vmovn_s32(s);
}
X265_PRAGMA_UNROLL(8)
for (k = 0; k < 32; k += 4)
{
int16x4_t x0 = dst[k + 0];
int16x4_t x1 = dst[k + 1];
int16x4_t x2 = dst[k + 2];
int16x4_t x3 = dst[k + 3];
transpose_4x4x16(x0, x1, x2, x3);
vst1_s16(&orig_dst[0 * 32 + k], x0);
vst1_s16(&orig_dst[1 * 32 + k], x1);
vst1_s16(&orig_dst[2 * 32 + k], x2);
vst1_s16(&orig_dst[3 * 32 + k], x3);
}
orig_dst += 4 * 32;
src += 4;
}
#undef MUL
#undef FMA
#undef FMAK
#undef MULK
#undef ODD31
#undef ODD15
#undef ODD7
}
}
namespace X265_NS
{
// x265 private namespace
void dct8_neon(const int16_t *src, int16_t *dst, intptr_t srcStride)
{
const int shift_pass1 = 2 + X265_DEPTH - 8;
const int shift_pass2 = 9;
ALIGN_VAR_32(int16_t, coef[8 * 8]);
ALIGN_VAR_32(int16_t, block[8 * 8]);
for (int i = 0; i < 8; i++)
{
memcpy(&block[i * 8], &src[i * srcStride], 8 * sizeof(int16_t));
}
partialButterfly8_neon<shift_pass1>(block, coef);
partialButterfly8_neon<shift_pass2>(coef, dst);
}
void dct16_neon(const int16_t *src, int16_t *dst, intptr_t srcStride)
{
const int shift_pass1 = 3 + X265_DEPTH - 8;
const int shift_pass2 = 10;
ALIGN_VAR_32(int16_t, coef[16 * 16]);
ALIGN_VAR_32(int16_t, block[16 * 16]);
for (int i = 0; i < 16; i++)
{
memcpy(&block[i * 16], &src[i * srcStride], 16 * sizeof(int16_t));
}
partialButterfly16_neon<shift_pass1>(block, coef);
partialButterfly16_neon<shift_pass2>(coef, dst);
}
void dct32_neon(const int16_t *src, int16_t *dst, intptr_t srcStride)
{
const int shift_pass1 = 4 + X265_DEPTH - 8;
const int shift_pass2 = 11;
ALIGN_VAR_32(int16_t, coef[32 * 32]);
ALIGN_VAR_32(int16_t, block[32 * 32]);
for (int i = 0; i < 32; i++)
{
memcpy(&block[i * 32], &src[i * srcStride], 32 * sizeof(int16_t));
}
partialButterfly32_neon<shift_pass1>(block, coef);
partialButterfly32_neon<shift_pass2>(coef, dst);
}
void idct4_neon(const int16_t *src, int16_t *dst, intptr_t dstStride)
{
const int shift_1st = 7;
const int shift_2nd = 12 - (X265_DEPTH - 8);
ALIGN_VAR_32(int16_t, coef[4 * 4]);
ALIGN_VAR_32(int16_t, block[4 * 4]);
partialButterflyInverse4(src, coef, shift_1st, 4); // Forward DST BY FAST ALGORITHM, block input, coef output
partialButterflyInverse4(coef, block, shift_2nd, 4); // Forward DST BY FAST ALGORITHM, coef input, coeff output
for (int i = 0; i < 4; i++)
{
memcpy(&dst[i * dstStride], &block[i * 4], 4 * sizeof(int16_t));
}
}
void idct16_neon(const int16_t *src, int16_t *dst, intptr_t dstStride)
{
const int shift_1st = 7;
const int shift_2nd = 12 - (X265_DEPTH - 8);
ALIGN_VAR_32(int16_t, coef[16 * 16]);
ALIGN_VAR_32(int16_t, block[16 * 16]);
partialButterflyInverse16_neon(src, coef, shift_1st, 16);
partialButterflyInverse16_neon(coef, block, shift_2nd, 16);
for (int i = 0; i < 16; i++)
{
memcpy(&dst[i * dstStride], &block[i * 16], 16 * sizeof(int16_t));
}
}
void idct32_neon(const int16_t *src, int16_t *dst, intptr_t dstStride)
{
const int shift_1st = 7;
const int shift_2nd = 12 - (X265_DEPTH - 8);
ALIGN_VAR_32(int16_t, coef[32 * 32]);
ALIGN_VAR_32(int16_t, block[32 * 32]);
partialButterflyInverse32_neon(src, coef, shift_1st, 32);
partialButterflyInverse32_neon(coef, block, shift_2nd, 32);
for (int i = 0; i < 32; i++)
{
memcpy(&dst[i * dstStride], &block[i * 32], 32 * sizeof(int16_t));
}
}
void setupDCTPrimitives_neon(EncoderPrimitives &p)
{
p.cu[BLOCK_4x4].nonPsyRdoQuant = nonPsyRdoQuant_neon<2>;
p.cu[BLOCK_8x8].nonPsyRdoQuant = nonPsyRdoQuant_neon<3>;
p.cu[BLOCK_16x16].nonPsyRdoQuant = nonPsyRdoQuant_neon<4>;
p.cu[BLOCK_32x32].nonPsyRdoQuant = nonPsyRdoQuant_neon<5>;
p.cu[BLOCK_4x4].psyRdoQuant = psyRdoQuant_neon<2>;
p.cu[BLOCK_8x8].psyRdoQuant = psyRdoQuant_neon<3>;
p.cu[BLOCK_16x16].psyRdoQuant = psyRdoQuant_neon<4>;
p.cu[BLOCK_32x32].psyRdoQuant = psyRdoQuant_neon<5>;
p.cu[BLOCK_8x8].dct = dct8_neon;
p.cu[BLOCK_16x16].dct = PFX(dct16_neon);
p.cu[BLOCK_32x32].dct = dct32_neon;
p.cu[BLOCK_4x4].idct = idct4_neon;
p.cu[BLOCK_16x16].idct = PFX(idct16_neon);
p.cu[BLOCK_32x32].idct = idct32_neon;
p.cu[BLOCK_4x4].count_nonzero = count_nonzero_neon<4>;
p.cu[BLOCK_8x8].count_nonzero = count_nonzero_neon<8>;
p.cu[BLOCK_16x16].count_nonzero = count_nonzero_neon<16>;
p.cu[BLOCK_32x32].count_nonzero = count_nonzero_neon<32>;
p.cu[BLOCK_4x4].copy_cnt = copy_count_neon<4>;
p.cu[BLOCK_8x8].copy_cnt = copy_count_neon<8>;
p.cu[BLOCK_16x16].copy_cnt = copy_count_neon<16>;
p.cu[BLOCK_32x32].copy_cnt = copy_count_neon<32>;
p.cu[BLOCK_4x4].psyRdoQuant_1p = nonPsyRdoQuant_neon<2>;
p.cu[BLOCK_4x4].psyRdoQuant_2p = psyRdoQuant_neon<2>;
p.cu[BLOCK_8x8].psyRdoQuant_1p = nonPsyRdoQuant_neon<3>;
p.cu[BLOCK_8x8].psyRdoQuant_2p = psyRdoQuant_neon<3>;
p.cu[BLOCK_16x16].psyRdoQuant_1p = nonPsyRdoQuant_neon<4>;
p.cu[BLOCK_16x16].psyRdoQuant_2p = psyRdoQuant_neon<4>;
p.cu[BLOCK_32x32].psyRdoQuant_1p = nonPsyRdoQuant_neon<5>;
p.cu[BLOCK_32x32].psyRdoQuant_2p = psyRdoQuant_neon<5>;
p.scanPosLast = scanPosLast_opt;
}
};
#endif
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