ncnn / src /layer /x86 /convolution_packed.h

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be903e2 over 2 years ago

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	// Tencent is pleased to support the open source community by making ncnn available.
	//
	// Copyright (C) 2023 THL A29 Limited, a Tencent company. All rights reserved.
	//
	// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
	// in compliance with the License. You may obtain a copy of the License at
	//
	// https://opensource.org/licenses/BSD-3-Clause
	//
	// Unless required by applicable law or agreed to in writing, software distributed
	// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
	// CONDITIONS OF ANY KIND, either express or implied. See the License for the
	// specific language governing permissions and limitations under the License.

	static void convolution_transform_kernel_packed(const Mat& kernel, Mat& kernel_tm, int inch, int outch, int kernel_w, int kernel_h)
	{
	const int maxk = kernel_w * kernel_h;

	// src = kw-kh-inch-outch
	// dst = pb-pa-kw-kh-inch/pa-outch/pb

	// clang-format off
	// INDENT-OFF
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	if (outch >= 16)
	{
	if (inch >= 16)
	kernel_tm.create(16 * 16 * maxk, inch / 16 + (inch % 16) / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 16 + (outch % 16) / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 8)
	kernel_tm.create(16 * 8 * maxk, inch / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 16 + (outch % 16) / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 4)
	kernel_tm.create(16 * 4 * maxk, inch / 4 + (inch % 4) / 2 + inch % 2, outch / 16 + (outch % 16) / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 2)
	kernel_tm.create(16 * 2 * maxk, inch / 2 + inch % 2, outch / 16 + (outch % 16) / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else
	kernel_tm.create(16 * maxk, inch, outch / 16 + (outch % 16) / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	}
	else
	#endif // __AVX512F__
	if (outch >= 8)
	{
	#if __AVX512F__
	if (inch >= 16)
	kernel_tm.create(8 * 16 * maxk, inch / 16 + (inch % 16) / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else
	#endif // __AVX512F__
	if (inch >= 8)
	kernel_tm.create(8 * 8 * maxk, inch / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 4)
	kernel_tm.create(8 * 4 * maxk, inch / 4 + (inch % 4) / 2 + inch % 2, outch / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 2)
	kernel_tm.create(8 * 2 * maxk, inch / 2 + inch % 2, outch / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	else
	kernel_tm.create(8 * maxk, inch, outch / 8 + (outch % 8) / 4 + (outch % 4) / 2 + outch % 2);
	}
	else
	#endif // __AVX__
	if (outch >= 4)
	{
	#if __AVX__
	#if __AVX512F__
	if (inch >= 16)
	kernel_tm.create(4 * 16 * maxk, inch / 16 + (inch % 16) / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 4 + (outch % 4) / 2 + outch % 2);
	else
	#endif // __AVX512F__
	if (inch >= 8)
	kernel_tm.create(4 * 8 * maxk, inch / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 4 + (outch % 4) / 2 + outch % 2);
	else
	#endif // __AVX__
	if (inch >= 4)
	kernel_tm.create(4 * 4 * maxk, inch / 4 + (inch % 4) / 2 + inch % 2, outch / 4 + (outch % 4) / 2 + outch % 2);
	else if (inch >= 2)
	kernel_tm.create(4 * 2 * maxk, inch / 2 + inch % 2, outch / 4 + (outch % 4) / 2 + outch % 2);
	else
	kernel_tm.create(4 * maxk, inch, outch / 4 + (outch % 4) / 2 + outch % 2);
	}
	else
	#endif // __SSE2__
	if (outch >= 2)
	{
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	if (inch >= 16)
	kernel_tm.create(2 * 16 * maxk, inch / 16 + (inch % 16) / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 2 + outch % 2);
	else
	#endif // __AVX512F__
	if (inch >= 8)
	kernel_tm.create(2 * 8 * maxk, inch / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch / 2 + outch % 2);
	else
	#endif // __AVX__
	if (inch >= 4)
	kernel_tm.create(2 * 4 * maxk, inch / 4 + (inch % 4) / 2 + inch % 2, outch / 2 + outch % 2);
	else
	#endif // __SSE2__
	if (inch >= 2)
	kernel_tm.create(2 * 2 * maxk, inch / 2 + inch % 2, outch / 2 + outch % 2);
	else
	kernel_tm.create(2 * maxk, inch, outch / 2 + outch % 2);
	}
	else
	{
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	if (inch >= 16)
	kernel_tm.create(16 * maxk, inch / 16 + (inch % 16) / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch);
	else
	#endif // __AVX512F__
	if (inch >= 8)
	kernel_tm.create(8 * maxk, inch / 8 + (inch % 8) / 4 + (inch % 4) / 2 + inch % 2, outch);
	else
	#endif // __AVX__
	if (inch >= 4)
	kernel_tm.create(4 * maxk, inch / 4 + (inch % 4) / 2 + inch % 2, outch);
	else
	#endif // __SSE2__
	if (inch >= 2)
	kernel_tm.create(2 * maxk, inch / 2 + inch % 2, outch);
	else
	kernel_tm.create(maxk, inch, outch);
	}
	// INDENT-ON
	// clang-format on

	int q = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	for (; q + 15 < outch; q += 16)
	{
	const float* kptr0 = (const float)kernel + q inch * maxk;
	const float* kptr1 = (const float)kernel + (q + 1) inch * maxk;
	const float* kptr2 = (const float)kernel + (q + 2) inch * maxk;
	const float* kptr3 = (const float)kernel + (q + 3) inch * maxk;
	const float* kptr4 = (const float)kernel + (q + 4) inch * maxk;
	const float* kptr5 = (const float)kernel + (q + 5) inch * maxk;
	const float* kptr6 = (const float)kernel + (q + 6) inch * maxk;
	const float* kptr7 = (const float)kernel + (q + 7) inch * maxk;
	const float* kptr8 = (const float)kernel + (q + 8) inch * maxk;
	const float* kptr9 = (const float)kernel + (q + 9) inch * maxk;
	const float* kptra = (const float)kernel + (q + 10) inch * maxk;
	const float* kptrb = (const float)kernel + (q + 11) inch * maxk;
	const float* kptrc = (const float)kernel + (q + 12) inch * maxk;
	const float* kptrd = (const float)kernel + (q + 13) inch * maxk;
	const float* kptre = (const float)kernel + (q + 14) inch * maxk;
	const float* kptrf = (const float)kernel + (q + 15) inch * maxk;

	float* g00 = kernel_tm.channel(q / 16);

	__m512i _vindex = _mm512_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
	_vindex = _mm512_mullo_epi32(_vindex, _mm512_set1_epi32(maxk));

	int p = 0;
	for (; p + 15 < inch; p += 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;
	const float* k8 = kptr8 + k;
	const float* k9 = kptr9 + k;
	const float* ka = kptra + k;
	const float* kb = kptrb + k;
	const float* kc = kptrc + k;
	const float* kd = kptrd + k;
	const float* ke = kptre + k;
	const float* kf = kptrf + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex, k0, sizeof(float));
	__m512 _k1 = _mm512_i32gather_ps(_vindex, k1, sizeof(float));
	__m512 _k2 = _mm512_i32gather_ps(_vindex, k2, sizeof(float));
	__m512 _k3 = _mm512_i32gather_ps(_vindex, k3, sizeof(float));
	__m512 _k4 = _mm512_i32gather_ps(_vindex, k4, sizeof(float));
	__m512 _k5 = _mm512_i32gather_ps(_vindex, k5, sizeof(float));
	__m512 _k6 = _mm512_i32gather_ps(_vindex, k6, sizeof(float));
	__m512 _k7 = _mm512_i32gather_ps(_vindex, k7, sizeof(float));
	__m512 _k8 = _mm512_i32gather_ps(_vindex, k8, sizeof(float));
	__m512 _k9 = _mm512_i32gather_ps(_vindex, k9, sizeof(float));
	__m512 _ka = _mm512_i32gather_ps(_vindex, ka, sizeof(float));
	__m512 _kb = _mm512_i32gather_ps(_vindex, kb, sizeof(float));
	__m512 _kc = _mm512_i32gather_ps(_vindex, kc, sizeof(float));
	__m512 _kd = _mm512_i32gather_ps(_vindex, kd, sizeof(float));
	__m512 _ke = _mm512_i32gather_ps(_vindex, ke, sizeof(float));
	__m512 _kf = _mm512_i32gather_ps(_vindex, kf, sizeof(float));

	transpose16x16_ps(_k0, _k1, _k2, _k3, _k4, _k5, _k6, _k7, _k8, _k9, _ka, _kb, _kc, _kd, _ke, _kf);

	_mm512_store_ps(g00, _k0);
	_mm512_store_ps(g00 + 16, _k1);
	_mm512_store_ps(g00 + 16 * 2, _k2);
	_mm512_store_ps(g00 + 16 * 3, _k3);
	_mm512_store_ps(g00 + 16 * 4, _k4);
	_mm512_store_ps(g00 + 16 * 5, _k5);
	_mm512_store_ps(g00 + 16 * 6, _k6);
	_mm512_store_ps(g00 + 16 * 7, _k7);
	_mm512_store_ps(g00 + 16 * 8, _k8);
	_mm512_store_ps(g00 + 16 * 9, _k9);
	_mm512_store_ps(g00 + 16 * 10, _ka);
	_mm512_store_ps(g00 + 16 * 11, _kb);
	_mm512_store_ps(g00 + 16 * 12, _kc);
	_mm512_store_ps(g00 + 16 * 13, _kd);
	_mm512_store_ps(g00 + 16 * 14, _ke);
	_mm512_store_ps(g00 + 16 * 15, _kf);

	g00 += 256;
	}

	kptr0 += maxk * 16;
	kptr1 += maxk * 16;
	kptr2 += maxk * 16;
	kptr3 += maxk * 16;
	kptr4 += maxk * 16;
	kptr5 += maxk * 16;
	kptr6 += maxk * 16;
	kptr7 += maxk * 16;
	kptr8 += maxk * 16;
	kptr9 += maxk * 16;
	kptra += maxk * 16;
	kptrb += maxk * 16;
	kptrc += maxk * 16;
	kptrd += maxk * 16;
	kptre += maxk * 16;
	kptrf += maxk * 16;
	}

	_vindex = _mm512_mullo_epi32(_vindex, _mm512_set1_epi32(inch));

	for (; p + 7 < inch; p += 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;

	for (int i = 0; i < 8; i++)
	{
	__m512 _k0 = _mm512_i32gather_ps(_vindex, k0, sizeof(float));
	_mm512_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 16;
	}
	}

	kptr0 += maxk * 8;
	}
	for (; p + 3 < inch; p += 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;

	for (int i = 0; i < 4; i++)
	{
	__m512 _k0 = _mm512_i32gather_ps(_vindex, k0, sizeof(float));
	_mm512_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 16;
	}
	}

	kptr0 += maxk * 4;
	}
	for (; p + 1 < inch; p += 2)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;

	for (int i = 0; i < 2; i++)
	{
	__m512 _k0 = _mm512_i32gather_ps(_vindex, k0, sizeof(float));
	_mm512_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 16;
	}
	}

	kptr0 += maxk * 2;
	}
	for (; p < inch; p++)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex, k0, sizeof(float));
	_mm512_store_ps(g00, _k0);
	g00 += 16;
	}
	}
	}
	#endif // __AVX512F__
	for (; q + 7 < outch; q += 8)
	{
	const float* kptr0 = (const float)kernel + q inch * maxk;
	const float* kptr1 = (const float)kernel + (q + 1) inch * maxk;
	const float* kptr2 = (const float)kernel + (q + 2) inch * maxk;
	const float* kptr3 = (const float)kernel + (q + 3) inch * maxk;
	const float* kptr4 = (const float)kernel + (q + 4) inch * maxk;
	const float* kptr5 = (const float)kernel + (q + 5) inch * maxk;
	const float* kptr6 = (const float)kernel + (q + 6) inch * maxk;
	const float* kptr7 = (const float)kernel + (q + 7) inch * maxk;

	#if __AVX512F__
	float* g00 = kernel_tm.channel(q / 16 + (q % 16) / 8);
	#else
	float* g00 = kernel_tm.channel(q / 8);
	#endif

	#if __AVX2__
	__m256i _vindex = _mm256_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7);
	_vindex = _mm256_mullo_epi32(_vindex, _mm256_set1_epi32(maxk));
	#if __AVX512F__
	__m512i _vindex_512 = _mm512_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
	_vindex_512 = _mm512_mullo_epi32(_vindex_512, _mm512_set1_epi32(maxk));
	#endif // __AVX512F__
	#endif // __AVX2__

	int p = 0;
	#if __AVX512F__
	for (; p + 15 < inch; p += 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex_512, k0, sizeof(float));
	__m512 _k1 = _mm512_i32gather_ps(_vindex_512, k1, sizeof(float));
	__m512 _k2 = _mm512_i32gather_ps(_vindex_512, k2, sizeof(float));
	__m512 _k3 = _mm512_i32gather_ps(_vindex_512, k3, sizeof(float));
	__m512 _k4 = _mm512_i32gather_ps(_vindex_512, k4, sizeof(float));
	__m512 _k5 = _mm512_i32gather_ps(_vindex_512, k5, sizeof(float));
	__m512 _k6 = _mm512_i32gather_ps(_vindex_512, k6, sizeof(float));
	__m512 _k7 = _mm512_i32gather_ps(_vindex_512, k7, sizeof(float));

	transpose16x8_ps(_k0, _k1, _k2, _k3, _k4, _k5, _k6, _k7);

	_mm512_storeu_ps(g00, _k0);
	_mm512_storeu_ps(g00 + 16, _k1);
	_mm512_storeu_ps(g00 + 16 * 2, _k2);
	_mm512_storeu_ps(g00 + 16 * 3, _k3);
	_mm512_storeu_ps(g00 + 16 * 4, _k4);
	_mm512_storeu_ps(g00 + 16 * 5, _k5);
	_mm512_storeu_ps(g00 + 16 * 6, _k6);
	_mm512_storeu_ps(g00 + 16 * 7, _k7);

	g00 += 128;
	}

	kptr0 += maxk * 16;
	kptr1 += maxk * 16;
	kptr2 += maxk * 16;
	kptr3 += maxk * 16;
	kptr4 += maxk * 16;
	kptr5 += maxk * 16;
	kptr6 += maxk * 16;
	kptr7 += maxk * 16;
	}
	#endif // __AVX512F__
	for (; p + 7 < inch; p += 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;

	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex, sizeof(float));
	__m256 _k1 = _mm256_i32gather_ps(k1, _vindex, sizeof(float));
	__m256 _k2 = _mm256_i32gather_ps(k2, _vindex, sizeof(float));
	__m256 _k3 = _mm256_i32gather_ps(k3, _vindex, sizeof(float));
	__m256 _k4 = _mm256_i32gather_ps(k4, _vindex, sizeof(float));
	__m256 _k5 = _mm256_i32gather_ps(k5, _vindex, sizeof(float));
	__m256 _k6 = _mm256_i32gather_ps(k6, _vindex, sizeof(float));
	__m256 _k7 = _mm256_i32gather_ps(k7, _vindex, sizeof(float));

	transpose8x8_ps(_k0, _k1, _k2, _k3, _k4, _k5, _k6, _k7);

	_mm256_store_ps(g00, _k0);
	_mm256_store_ps(g00 + 8, _k1);
	_mm256_store_ps(g00 + 8 * 2, _k2);
	_mm256_store_ps(g00 + 8 * 3, _k3);
	_mm256_store_ps(g00 + 8 * 4, _k4);
	_mm256_store_ps(g00 + 8 * 5, _k5);
	_mm256_store_ps(g00 + 8 * 6, _k6);
	_mm256_store_ps(g00 + 8 * 7, _k7);

	g00 += 64;
	#else // __AVX2__
	for (int i = 0; i < 8; i++)
	{
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	g00[4] = k4[0];
	g00[5] = k5[0];
	g00[6] = k6[0];
	g00[7] = k7[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	k4 += maxk;
	k5 += maxk;
	k6 += maxk;
	k7 += maxk;
	g00 += 8;
	}
	#endif // __AVX2__
	}

	kptr0 += maxk * 8;
	kptr1 += maxk * 8;
	kptr2 += maxk * 8;
	kptr3 += maxk * 8;
	kptr4 += maxk * 8;
	kptr5 += maxk * 8;
	kptr6 += maxk * 8;
	kptr7 += maxk * 8;
	}

	#if __AVX2__
	_vindex = _mm256_mullo_epi32(_vindex, _mm256_set1_epi32(inch));
	#endif // __AVX2__

	for (; p + 3 < inch; p += 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	#if !__AVX2__
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;
	#endif // !__AVX2__

	for (int i = 0; i < 4; i++)
	{
	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex, sizeof(float));
	_mm256_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 8;
	#else // __AVX2__
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	g00[4] = k4[0];
	g00[5] = k5[0];
	g00[6] = k6[0];
	g00[7] = k7[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	k4 += maxk;
	k5 += maxk;
	k6 += maxk;
	k7 += maxk;
	g00 += 8;
	#endif // __AVX2__
	}
	}

	kptr0 += maxk * 4;
	#if !__AVX2__
	kptr1 += maxk * 4;
	kptr2 += maxk * 4;
	kptr3 += maxk * 4;
	kptr4 += maxk * 4;
	kptr5 += maxk * 4;
	kptr6 += maxk * 4;
	kptr7 += maxk * 4;
	#endif // !__AVX2__
	}
	for (; p + 1 < inch; p += 2)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	#if !__AVX2__
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;
	#endif // !__AVX2__

	for (int i = 0; i < 2; i++)
	{
	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex, sizeof(float));
	_mm256_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 8;
	#else // __AVX2__
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	g00[4] = k4[0];
	g00[5] = k5[0];
	g00[6] = k6[0];
	g00[7] = k7[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	k4 += maxk;
	k5 += maxk;
	k6 += maxk;
	k7 += maxk;
	g00 += 8;
	#endif // __AVX2__
	}
	}

	kptr0 += maxk * 2;
	#if !__AVX2__
	kptr1 += maxk * 2;
	kptr2 += maxk * 2;
	kptr3 += maxk * 2;
	kptr4 += maxk * 2;
	kptr5 += maxk * 2;
	kptr6 += maxk * 2;
	kptr7 += maxk * 2;
	#endif // !__AVX2__
	}
	for (; p < inch; p++)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex, sizeof(float));
	_mm256_store_ps(g00, _k0);
	g00 += 8;
	#else // __AVX2__
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	const float* k4 = kptr4 + k;
	const float* k5 = kptr5 + k;
	const float* k6 = kptr6 + k;
	const float* k7 = kptr7 + k;

	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	g00[4] = k4[0];
	g00[5] = k5[0];
	g00[6] = k6[0];
	g00[7] = k7[0];
	g00 += 8;
	#endif // __AVX2__
	}
	}
	}
	#endif // __AVX__
	for (; q + 3 < outch; q += 4)
	{
	const float* kptr0 = (const float)kernel + q inch * maxk;
	const float* kptr1 = (const float)kernel + (q + 1) inch * maxk;
	const float* kptr2 = (const float)kernel + (q + 2) inch * maxk;
	const float* kptr3 = (const float)kernel + (q + 3) inch * maxk;

	#if __AVX512F__
	float* g00 = kernel_tm.channel(q / 16 + (q % 16) / 8 + (q % 8) / 4);
	#elif __AVX__
	float* g00 = kernel_tm.channel(q / 8 + (q % 8) / 4);
	#else
	float* g00 = kernel_tm.channel(q / 4);
	#endif

	#if __AVX2__
	__m128i _vindex = _mm_setr_epi32(0, 1, 2, 3);
	_vindex = _mm_mullo_epi32(_vindex, _mm_set1_epi32(maxk));
	__m256i _vindex_256 = _mm256_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7);
	_vindex_256 = _mm256_mullo_epi32(_vindex_256, _mm256_set1_epi32(maxk));
	#if __AVX512F__
	__m512i _vindex_512 = _mm512_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
	_vindex_512 = _mm512_mullo_epi32(_vindex_512, _mm512_set1_epi32(maxk));
	#endif // __AVX512F__
	#endif // __AVX2__

	int p = 0;
	#if __AVX__
	#if __AVX512F__
	for (; p + 15 < inch; p += 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex_512, k0, sizeof(float));
	__m512 _k1 = _mm512_i32gather_ps(_vindex_512, k1, sizeof(float));
	__m512 _k2 = _mm512_i32gather_ps(_vindex_512, k2, sizeof(float));
	__m512 _k3 = _mm512_i32gather_ps(_vindex_512, k3, sizeof(float));

	transpose16x4_ps(_k0, _k1, _k2, _k3);

	_mm512_storeu_ps(g00, _k0);
	_mm512_storeu_ps(g00 + 16, _k1);
	_mm512_storeu_ps(g00 + 16 * 2, _k2);
	_mm512_storeu_ps(g00 + 16 * 3, _k3);

	g00 += 64;
	}

	kptr0 += maxk * 16;
	kptr1 += maxk * 16;
	kptr2 += maxk * 16;
	kptr3 += maxk * 16;
	}
	#endif // __AVX512F__
	for (; p + 7 < inch; p += 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;

	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex_256, sizeof(float));
	__m256 _k1 = _mm256_i32gather_ps(k1, _vindex_256, sizeof(float));
	__m256 _k2 = _mm256_i32gather_ps(k2, _vindex_256, sizeof(float));
	__m256 _k3 = _mm256_i32gather_ps(k3, _vindex_256, sizeof(float));

	transpose8x4_ps(_k0, _k1, _k2, _k3);

	_mm256_storeu_ps(g00, _k0);
	_mm256_storeu_ps(g00 + 8, _k1);
	_mm256_storeu_ps(g00 + 8 * 2, _k2);
	_mm256_storeu_ps(g00 + 8 * 3, _k3);

	g00 += 32;
	#else // __AVX2__
	for (int i = 0; i < 8; i++)
	{
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	g00 += 4;
	}
	#endif // __AVX2__
	}

	kptr0 += maxk * 8;
	kptr1 += maxk * 8;
	kptr2 += maxk * 8;
	kptr3 += maxk * 8;
	}
	#endif // __AVX__
	for (; p + 3 < inch; p += 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;

	#if __AVX2__
	__m128 _k0 = _mm_i32gather_ps(k0, _vindex, sizeof(float));
	__m128 _k1 = _mm_i32gather_ps(k1, _vindex, sizeof(float));
	__m128 _k2 = _mm_i32gather_ps(k2, _vindex, sizeof(float));
	__m128 _k3 = _mm_i32gather_ps(k3, _vindex, sizeof(float));

	_MM_TRANSPOSE4_PS(_k0, _k1, _k2, _k3);

	_mm_store_ps(g00, _k0);
	_mm_store_ps(g00 + 4, _k1);
	_mm_store_ps(g00 + 4 * 2, _k2);
	_mm_store_ps(g00 + 4 * 3, _k3);

	g00 += 16;
	#else // __AVX2__
	for (int i = 0; i < 4; i++)
	{
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	g00 += 4;
	}
	#endif // __AVX2__
	}

	kptr0 += maxk * 4;
	kptr1 += maxk * 4;
	kptr2 += maxk * 4;
	kptr3 += maxk * 4;
	}

	#if __AVX2__
	_vindex = _mm_mullo_epi32(_vindex, _mm_set1_epi32(inch));
	#endif // __AVX2__

	for (; p + 1 < inch; p += 2)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	#if !__AVX2__
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;
	#endif // !__AVX2__

	for (int i = 0; i < 2; i++)
	{
	#if __AVX2__
	__m128 _k0 = _mm_i32gather_ps(k0, _vindex, sizeof(float));
	_mm_store_ps(g00, _k0);
	k0 += maxk;
	g00 += 4;
	#else // __AVX2__
	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	k0 += maxk;
	k1 += maxk;
	k2 += maxk;
	k3 += maxk;
	g00 += 4;
	#endif // __AVX2__
	}
	}

	kptr0 += maxk * 2;
	#if !__AVX2__
	kptr1 += maxk * 2;
	kptr2 += maxk * 2;
	kptr3 += maxk * 2;
	#endif // !__AVX2__
	}
	for (; p < inch; p++)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	#if __AVX2__
	__m128 _k0 = _mm_i32gather_ps(k0, _vindex, sizeof(float));
	_mm_store_ps(g00, _k0);
	g00 += 4;
	#else // __AVX2__
	const float* k1 = kptr1 + k;
	const float* k2 = kptr2 + k;
	const float* k3 = kptr3 + k;

	g00[0] = k0[0];
	g00[1] = k1[0];
	g00[2] = k2[0];
	g00[3] = k3[0];
	g00 += 4;
	#endif // __AVX2__
	}
	}
	}
	#endif // __SSE2__
	for (; q + 1 < outch; q += 2)
	{
	const float* kptr0 = (const float)kernel + q inch * maxk;
	const float* kptr1 = (const float)kernel + (q + 1) inch * maxk;

	#if __AVX512F__
	float* g00 = kernel_tm.channel(q / 16 + (q % 16) / 8 + (q % 8) / 4 + (q % 4) / 2);
	#elif __AVX__
	float* g00 = kernel_tm.channel(q / 8 + (q % 8) / 4 + (q % 4) / 2);
	#elif __SSE2__
	float* g00 = kernel_tm.channel(q / 4 + (q % 4) / 2);
	#else
	float* g00 = kernel_tm.channel(q / 2);
	#endif

	#if __AVX2__
	__m128i _vindex = _mm_setr_epi32(0, 1, 2, 3);
	_vindex = _mm_mullo_epi32(_vindex, _mm_set1_epi32(maxk));
	__m256i _vindex_256 = _mm256_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7);
	_vindex_256 = _mm256_mullo_epi32(_vindex_256, _mm256_set1_epi32(maxk));
	#if __AVX512F__
	__m512i _vindex_512 = _mm512_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
	_vindex_512 = _mm512_mullo_epi32(_vindex_512, _mm512_set1_epi32(maxk));
	#endif // __AVX512F__
	#endif // __AVX2__

	int p = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	for (; p + 15 < inch; p += 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex_512, k0, sizeof(float));
	__m512 _k1 = _mm512_i32gather_ps(_vindex_512, k1, sizeof(float));
	_mm512_storeu_ps(g00, _k0);
	_mm512_storeu_ps(g00 + 16, _k1);
	g00 += 32;
	}

	kptr0 += maxk * 16;
	kptr1 += maxk * 16;
	}
	#endif // __AVX512F__
	for (; p + 7 < inch; p += 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;

	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex_256, sizeof(float));
	__m256 _k1 = _mm256_i32gather_ps(k1, _vindex_256, sizeof(float));
	_mm256_storeu_ps(g00, _k0);
	_mm256_storeu_ps(g00 + 8, _k1);
	g00 += 16;
	#else // __AVX2__
	g00[0] = k0[0];
	g00[1] = k0[maxk];
	g00[2] = k0[maxk * 2];
	g00[3] = k0[maxk * 3];
	g00[4] = k0[maxk * 4];
	g00[5] = k0[maxk * 5];
	g00[6] = k0[maxk * 6];
	g00[7] = k0[maxk * 7];
	g00[8] = k1[0];
	g00[9] = k1[maxk];
	g00[10] = k1[maxk * 2];
	g00[11] = k1[maxk * 3];
	g00[12] = k1[maxk * 4];
	g00[13] = k1[maxk * 5];
	g00[14] = k1[maxk * 6];
	g00[15] = k1[maxk * 7];
	g00 += 16;
	#endif // __AVX2__
	}

	kptr0 += maxk * 8;
	kptr1 += maxk * 8;
	}
	#endif // __AVX__
	for (; p + 3 < inch; p += 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;

	#if __AVX2__
	__m128 _k0 = _mm_i32gather_ps(k0, _vindex, sizeof(float));
	__m128 _k1 = _mm_i32gather_ps(k1, _vindex, sizeof(float));
	_mm_storeu_ps(g00, _k0);
	_mm_storeu_ps(g00 + 4, _k1);
	g00 += 8;
	#else // __AVX2__
	g00[0] = k0[0];
	g00[1] = k0[maxk];
	g00[2] = k0[maxk * 2];
	g00[3] = k0[maxk * 3];
	g00[4] = k1[0];
	g00[5] = k1[maxk];
	g00[6] = k1[maxk * 2];
	g00[7] = k1[maxk * 3];
	g00 += 8;
	#endif // __AVX2__
	}

	kptr0 += maxk * 4;
	kptr1 += maxk * 4;
	}
	#endif // __SSE2__
	for (; p + 1 < inch; p += 2)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;

	for (int i = 0; i < 2; i++)
	{
	g00[0] = k0[0];
	g00[1] = k1[0];
	k0 += maxk;
	k1 += maxk;
	g00 += 2;
	}
	}

	kptr0 += maxk * 2;
	kptr1 += maxk * 2;
	}
	for (; p < inch; p++)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr0 + k;
	const float* k1 = kptr1 + k;

	g00[0] = k0[0];
	g00[1] = k1[0];
	g00 += 2;
	}
	}
	}
	for (; q < outch; q++)
	{
	const float* kptr = (const float)kernel + q inch * maxk;

	#if __AVX512F__
	float* g00 = kernel_tm.channel(q / 16 + (q % 16) / 8 + (q % 8) / 4 + (q % 4) / 2 + q % 2);
	#elif __AVX__
	float* g00 = kernel_tm.channel(q / 8 + (q % 8) / 4 + (q % 4) / 2 + q % 2);
	#elif __SSE2__
	float* g00 = kernel_tm.channel(q / 4 + (q % 4) / 2 + q % 2);
	#else
	float* g00 = kernel_tm.channel(q / 2 + q % 2);
	#endif

	#if __AVX2__
	__m128i _vindex = _mm_setr_epi32(0, 1, 2, 3);
	_vindex = _mm_mullo_epi32(_vindex, _mm_set1_epi32(maxk));
	__m256i _vindex_256 = _mm256_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7);
	_vindex_256 = _mm256_mullo_epi32(_vindex_256, _mm256_set1_epi32(maxk));
	#if __AVX512F__
	__m512i _vindex_512 = _mm512_setr_epi32(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
	_vindex_512 = _mm512_mullo_epi32(_vindex_512, _mm512_set1_epi32(maxk));
	#endif // __AVX512F__
	#endif // __AVX2__

	int p = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	for (; p + 15 < inch; p += 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr + k;

	__m512 _k0 = _mm512_i32gather_ps(_vindex_512, k0, sizeof(float));
	_mm512_storeu_ps(g00, _k0);
	g00 += 16;
	}

	kptr += maxk * 16;
	}
	#endif // __AVX512F__
	for (; p + 7 < inch; p += 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr + k;

	#if __AVX2__
	__m256 _k0 = _mm256_i32gather_ps(k0, _vindex_256, sizeof(float));
	_mm256_storeu_ps(g00, _k0);
	g00 += 8;
	#else // __AVX2__
	for (int i = 0; i < 8; i++)
	{
	g00[0] = k0[0];
	k0 += maxk;
	g00 += 1;
	}
	#endif // __AVX2__
	}

	kptr += maxk * 8;
	}
	#endif // __AVX__
	for (; p + 3 < inch; p += 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr + k;

	#if __AVX2__
	__m128 _k0 = _mm_i32gather_ps(k0, _vindex, sizeof(float));
	_mm_storeu_ps(g00, _k0);
	g00 += 4;
	#else // __AVX2__
	for (int i = 0; i < 4; i++)
	{
	g00[0] = k0[0];
	k0 += maxk;
	g00 += 1;
	}
	#endif // __AVX2__
	}

	kptr += maxk * 4;
	}
	#endif // __SSE2__
	for (; p + 1 < inch; p += 2)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr + k;

	for (int i = 0; i < 2; i++)
	{
	g00[0] = k0[0];
	k0 += maxk;
	g00 += 1;
	}
	}

	kptr += maxk * 2;
	}
	for (; p < inch; p++)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* k0 = kptr + k;

	g00[0] = k0[0];
	g00++;
	}
	}
	}
	}

	static void convolution_packed(const Mat& bottom_blob, Mat& top_blob, const Mat& weight_data_tm, const Mat& bias_data, int kernel_w, int kernel_h, int dilation_w, int dilation_h, int stride_w, int stride_h, int activation_type, const Mat& activation_params, const Option& opt)
	{
	const int w = bottom_blob.w;
	const int elempack = bottom_blob.elempack;
	const int inch = bottom_blob.c * elempack;

	const int N = bottom_blob.cstep * elempack;

	const int outw = top_blob.w;
	const int outh = top_blob.h;
	const int out_elempack = top_blob.elempack;
	const int outch = top_blob.c * out_elempack;

	const int M = top_blob.cstep * out_elempack;

	const int maxk = kernel_w * kernel_h;

	// kernel offsets
	std::vector<int> _space_ofs(maxk);
	int* space_ofs = &_space_ofs[0];
	{
	int p1 = 0;
	int p2 = 0;
	int gap = w * dilation_h - kernel_w * dilation_w;
	for (int i = 0; i < kernel_h; i++)
	{
	for (int j = 0; j < kernel_w; j++)
	{
	space_ofs[p1] = p2 * elempack;
	p1++;
	p2 += dilation_w;
	}
	p2 += gap;
	}
	}

	const float* bias_data_ptr = bias_data;

	int nn_outch = 0;
	int remain_outch_start = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	nn_outch = outch / 16;
	#pragma omp parallel for num_threads(opt.num_threads)
	for (int pp = 0; pp < nn_outch; pp++)
	{
	const int p = pp * 16;

	// shadowed variable for less openmp task args
	const int elempack = bottom_blob.elempack;
	const int inch = bottom_blob.c * elempack;
	const int outw = top_blob.w;
	const int outh = top_blob.h;
	const int out_elempack = top_blob.elempack;

	float* outptr = top_blob.channel(p / out_elempack);

	for (int i = 0; i < outh; i++)
	{
	for (int j = 0; j < outw; j++)
	{
	__m512 _sum0 = _mm512_setzero_ps();
	__m512 _sum1 = _mm512_setzero_ps();
	__m512 _sum2 = _mm512_setzero_ps();
	__m512 _sum3 = _mm512_setzero_ps();

	if (bias_data_ptr)
	{
	_sum0 = _mm512_loadu_ps(bias_data_ptr + p);
	}

	const float* kptr = weight_data_tm.channel(p / 16);

	int q = 0;
	for (; q + 15 < inch; q += 16)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);
	__m512 _w8 = _mm512_load_ps(kptr + 16 * 8);
	__m512 _w9 = _mm512_load_ps(kptr + 16 * 9);
	__m512 _wa = _mm512_load_ps(kptr + 16 * 10);
	__m512 _wb = _mm512_load_ps(kptr + 16 * 11);
	__m512 _wc = _mm512_load_ps(kptr + 16 * 12);
	__m512 _wd = _mm512_load_ps(kptr + 16 * 13);
	__m512 _we = _mm512_load_ps(kptr + 16 * 14);
	__m512 _wf = _mm512_load_ps(kptr + 16 * 15);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w8, _mm512_set1_ps(r0s[8]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w9, _mm512_set1_ps(r0s[9]), _sum1);
	_sum2 = _mm512_fmadd_ps(_wa, _mm512_set1_ps(r0s[10]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wb, _mm512_set1_ps(r0s[11]), _sum3);
	_sum0 = _mm512_fmadd_ps(_wc, _mm512_set1_ps(r0s[12]), _sum0);
	_sum1 = _mm512_fmadd_ps(_wd, _mm512_set1_ps(r0s[13]), _sum1);
	_sum2 = _mm512_fmadd_ps(_we, _mm512_set1_ps(r0s[14]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wf, _mm512_set1_ps(r0s[15]), _sum3);

	kptr += 256;
	}
	}
	if (elempack == 8)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);
	__m512 _w8 = _mm512_load_ps(kptr + 16 * 8);
	__m512 _w9 = _mm512_load_ps(kptr + 16 * 9);
	__m512 _wa = _mm512_load_ps(kptr + 16 * 10);
	__m512 _wb = _mm512_load_ps(kptr + 16 * 11);
	__m512 _wc = _mm512_load_ps(kptr + 16 * 12);
	__m512 _wd = _mm512_load_ps(kptr + 16 * 13);
	__m512 _we = _mm512_load_ps(kptr + 16 * 14);
	__m512 _wf = _mm512_load_ps(kptr + 16 * 15);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w8, _mm512_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w9, _mm512_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_wa, _mm512_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wb, _mm512_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_wc, _mm512_set1_ps(r1s[4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_wd, _mm512_set1_ps(r1s[5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_we, _mm512_set1_ps(r1s[6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wf, _mm512_set1_ps(r1s[7]), _sum3);

	kptr += 256;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;
	const float* r2 = r0 + N * 2;
	const float* r3 = r0 + N * 3;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];
	const float* r2s = r2 + space_ofs[k];
	const float* r3s = r3 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);
	__m512 _w8 = _mm512_load_ps(kptr + 16 * 8);
	__m512 _w9 = _mm512_load_ps(kptr + 16 * 9);
	__m512 _wa = _mm512_load_ps(kptr + 16 * 10);
	__m512 _wb = _mm512_load_ps(kptr + 16 * 11);
	__m512 _wc = _mm512_load_ps(kptr + 16 * 12);
	__m512 _wd = _mm512_load_ps(kptr + 16 * 13);
	__m512 _we = _mm512_load_ps(kptr + 16 * 14);
	__m512 _wf = _mm512_load_ps(kptr + 16 * 15);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w8, _mm512_set1_ps(r2s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w9, _mm512_set1_ps(r2s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_wa, _mm512_set1_ps(r2s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wb, _mm512_set1_ps(r2s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_wc, _mm512_set1_ps(r3s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_wd, _mm512_set1_ps(r3s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_we, _mm512_set1_ps(r3s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wf, _mm512_set1_ps(r3s[3]), _sum3);

	kptr += 256;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);
	__m512 _w8 = _mm512_load_ps(kptr + 16 * 8);
	__m512 _w9 = _mm512_load_ps(kptr + 16 * 9);
	__m512 _wa = _mm512_load_ps(kptr + 16 * 10);
	__m512 _wb = _mm512_load_ps(kptr + 16 * 11);
	__m512 _wc = _mm512_load_ps(kptr + 16 * 12);
	__m512 _wd = _mm512_load_ps(kptr + 16 * 13);
	__m512 _we = _mm512_load_ps(kptr + 16 * 14);
	__m512 _wf = _mm512_load_ps(kptr + 16 * 15);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r0[sok + N * 7]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w8, _mm512_set1_ps(r0[sok + N * 8]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w9, _mm512_set1_ps(r0[sok + N * 9]), _sum1);
	_sum2 = _mm512_fmadd_ps(_wa, _mm512_set1_ps(r0[sok + N * 10]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wb, _mm512_set1_ps(r0[sok + N * 11]), _sum3);
	_sum0 = _mm512_fmadd_ps(_wc, _mm512_set1_ps(r0[sok + N * 12]), _sum0);
	_sum1 = _mm512_fmadd_ps(_wd, _mm512_set1_ps(r0[sok + N * 13]), _sum1);
	_sum2 = _mm512_fmadd_ps(_we, _mm512_set1_ps(r0[sok + N * 14]), _sum2);
	_sum3 = _mm512_fmadd_ps(_wf, _mm512_set1_ps(r0[sok + N * 15]), _sum3);

	kptr += 256;
	}
	}
	}
	for (; q + 7 < inch; q += 8)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r0s[7]), _sum3);

	kptr += 128;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r1s[3]), _sum3);

	kptr += 128;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr + 16 * 0);
	__m512 _w1 = _mm512_load_ps(kptr + 16 * 1);
	__m512 _w2 = _mm512_load_ps(kptr + 16 * 2);
	__m512 _w3 = _mm512_load_ps(kptr + 16 * 3);
	__m512 _w4 = _mm512_load_ps(kptr + 16 * 4);
	__m512 _w5 = _mm512_load_ps(kptr + 16 * 5);
	__m512 _w6 = _mm512_load_ps(kptr + 16 * 6);
	__m512 _w7 = _mm512_load_ps(kptr + 16 * 7);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm512_fmadd_ps(_w4, _mm512_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w5, _mm512_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w6, _mm512_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w7, _mm512_set1_ps(r0[sok + N * 7]), _sum3);

	kptr += 128;
	}
	}
	}
	for (; q + 3 < inch; q += 4)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	__m512 _w2 = _mm512_load_ps(kptr + 32);
	__m512 _w3 = _mm512_load_ps(kptr + 48);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0s[3]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	__m512 _w2 = _mm512_load_ps(kptr + 32);
	__m512 _w3 = _mm512_load_ps(kptr + 48);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm512_fmadd_ps(_w2, _mm512_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm512_fmadd_ps(_w3, _mm512_set1_ps(r0[sok + N * 3]), _sum3);

	kptr += 64;
	}
	}
	}
	for (; q + 1 < inch; q += 2)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);

	_sum0 = _mm512_fmadd_ps(_w0, _mm512_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm512_fmadd_ps(_w1, _mm512_set1_ps(r0[sok + N]), _sum1);

	kptr += 32;
	}
	}
	}
	for (; q < inch; q++)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	__m512 _val = _mm512_set1_ps(r0[space_ofs[k]]);
	__m512 _w = _mm512_load_ps(kptr);
	_sum0 = _mm512_fmadd_ps(_val, _w, _sum0);

	kptr += 16;
	}
	}
	}

	_sum0 = _mm512_add_ps(_sum0, _sum1);
	_sum2 = _mm512_add_ps(_sum2, _sum3);
	_sum0 = _mm512_add_ps(_sum0, _sum2);

	_sum0 = activation_avx512(_sum0, activation_type, activation_params);

	if (out_elempack == 16)
	{
	_mm512_store_ps(outptr, _sum0);
	outptr += 16;
	}
	if (out_elempack == 8)
	{
	_mm256_store_ps(outptr, _mm512_extractf32x8_ps(_sum0, 0));
	_mm256_store_ps(outptr + M, _mm512_extractf32x8_ps(_sum0, 1));
	outptr += 8;
	}
	if (out_elempack == 4)
	{
	_mm_store_ps(outptr, _mm512_extractf32x4_ps(_sum0, 0));
	_mm_store_ps(outptr + M, _mm512_extractf32x4_ps(_sum0, 1));
	_mm_store_ps(outptr + M * 2, _mm512_extractf32x4_ps(_sum0, 2));
	_mm_store_ps(outptr + M * 3, _mm512_extractf32x4_ps(_sum0, 3));
	outptr += 4;
	}
	if (out_elempack == 1)
	{
	float sum[16];
	_mm512_storeu_ps(sum, _sum0);

	outptr[0] = sum[0];
	outptr[M] = sum[1];
	outptr[M * 2] = sum[2];
	outptr[M * 3] = sum[3];
	outptr[M * 4] = sum[4];
	outptr[M * 5] = sum[5];
	outptr[M * 6] = sum[6];
	outptr[M * 7] = sum[7];
	outptr[M * 8] = sum[8];
	outptr[M * 9] = sum[9];
	outptr[M * 10] = sum[10];
	outptr[M * 11] = sum[11];
	outptr[M * 12] = sum[12];
	outptr[M * 13] = sum[13];
	outptr[M * 14] = sum[14];
	outptr[M * 15] = sum[15];
	outptr += 1;
	}
	}
	}
	}
	remain_outch_start += nn_outch * 16;
	nn_outch = (outch - remain_outch_start) / 8;
	#else // __AVX512F__
	nn_outch = (outch - remain_outch_start) / 8;
	#pragma omp parallel for num_threads(opt.num_threads)
	#endif // __AVX512F__
	for (int pp = 0; pp < nn_outch; pp++)
	{
	const int p = remain_outch_start + pp * 8;

	// shadowed variable for less openmp task args
	const int elempack = bottom_blob.elempack;
	const int inch = bottom_blob.c * elempack;
	const int outw = top_blob.w;
	const int outh = top_blob.h;
	const int out_elempack = top_blob.elempack;

	float* outptr = top_blob.channel(p / out_elempack);

	for (int i = 0; i < outh; i++)
	{
	for (int j = 0; j < outw; j++)
	{
	__m256 _sum0 = _mm256_setzero_ps();
	__m256 _sum1 = _mm256_setzero_ps();
	__m256 _sum2 = _mm256_setzero_ps();
	__m256 _sum3 = _mm256_setzero_ps();

	if (bias_data_ptr)
	{
	_sum0 = _mm256_loadu_ps(bias_data_ptr + p);
	}

	#if __AVX512F__
	const float* kptr = weight_data_tm.channel(p / 16 + (p % 16) / 8);
	#else
	const float* kptr = weight_data_tm.channel(p / 8);
	#endif

	int q = 0;
	#if __AVX512F__
	for (; q + 15 < inch; q += 16)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr + 8 * 0);
	__m256 _w1 = _mm256_load_ps(kptr + 8 * 1);
	__m256 _w2 = _mm256_load_ps(kptr + 8 * 2);
	__m256 _w3 = _mm256_load_ps(kptr + 8 * 3);
	__m256 _w4 = _mm256_load_ps(kptr + 8 * 4);
	__m256 _w5 = _mm256_load_ps(kptr + 8 * 5);
	__m256 _w6 = _mm256_load_ps(kptr + 8 * 6);
	__m256 _w7 = _mm256_load_ps(kptr + 8 * 7);
	__m256 _w8 = _mm256_load_ps(kptr + 8 * 8);
	__m256 _w9 = _mm256_load_ps(kptr + 8 * 9);
	__m256 _wa = _mm256_load_ps(kptr + 8 * 10);
	__m256 _wb = _mm256_load_ps(kptr + 8 * 11);
	__m256 _wc = _mm256_load_ps(kptr + 8 * 12);
	__m256 _wd = _mm256_load_ps(kptr + 8 * 13);
	__m256 _we = _mm256_load_ps(kptr + 8 * 14);
	__m256 _wf = _mm256_load_ps(kptr + 8 * 15);

	_sum0 = _mm256_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w4, _mm256_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w5, _mm256_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w6, _mm256_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w7, _mm256_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w8, _mm256_set1_ps(r0s[8]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w9, _mm256_set1_ps(r0s[9]), _sum1);
	_sum2 = _mm256_fmadd_ps(_wa, _mm256_set1_ps(r0s[10]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wb, _mm256_set1_ps(r0s[11]), _sum3);
	_sum0 = _mm256_fmadd_ps(_wc, _mm256_set1_ps(r0s[12]), _sum0);
	_sum1 = _mm256_fmadd_ps(_wd, _mm256_set1_ps(r0s[13]), _sum1);
	_sum2 = _mm256_fmadd_ps(_we, _mm256_set1_ps(r0s[14]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wf, _mm256_set1_ps(r0s[15]), _sum3);

	kptr += 128;
	}
	}
	if (elempack == 8)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr + 8 * 0);
	__m256 _w1 = _mm256_load_ps(kptr + 8 * 1);
	__m256 _w2 = _mm256_load_ps(kptr + 8 * 2);
	__m256 _w3 = _mm256_load_ps(kptr + 8 * 3);
	__m256 _w4 = _mm256_load_ps(kptr + 8 * 4);
	__m256 _w5 = _mm256_load_ps(kptr + 8 * 5);
	__m256 _w6 = _mm256_load_ps(kptr + 8 * 6);
	__m256 _w7 = _mm256_load_ps(kptr + 8 * 7);
	__m256 _w8 = _mm256_load_ps(kptr + 8 * 8);
	__m256 _w9 = _mm256_load_ps(kptr + 8 * 9);
	__m256 _wa = _mm256_load_ps(kptr + 8 * 10);
	__m256 _wb = _mm256_load_ps(kptr + 8 * 11);
	__m256 _wc = _mm256_load_ps(kptr + 8 * 12);
	__m256 _wd = _mm256_load_ps(kptr + 8 * 13);
	__m256 _we = _mm256_load_ps(kptr + 8 * 14);
	__m256 _wf = _mm256_load_ps(kptr + 8 * 15);

	_sum0 = _mm256_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w4, _mm256_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w5, _mm256_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w6, _mm256_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w7, _mm256_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w8, _mm256_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w9, _mm256_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_wa, _mm256_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wb, _mm256_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_wc, _mm256_set1_ps(r1s[4]), _sum0);
	_sum1 = _mm256_fmadd_ps(_wd, _mm256_set1_ps(r1s[5]), _sum1);
	_sum2 = _mm256_fmadd_ps(_we, _mm256_set1_ps(r1s[6]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wf, _mm256_set1_ps(r1s[7]), _sum3);

	kptr += 128;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;
	const float* r2 = r0 + N * 2;
	const float* r3 = r0 + N * 3;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];
	const float* r2s = r2 + space_ofs[k];
	const float* r3s = r3 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr + 8 * 0);
	__m256 _w1 = _mm256_load_ps(kptr + 8 * 1);
	__m256 _w2 = _mm256_load_ps(kptr + 8 * 2);
	__m256 _w3 = _mm256_load_ps(kptr + 8 * 3);
	__m256 _w4 = _mm256_load_ps(kptr + 8 * 4);
	__m256 _w5 = _mm256_load_ps(kptr + 8 * 5);
	__m256 _w6 = _mm256_load_ps(kptr + 8 * 6);
	__m256 _w7 = _mm256_load_ps(kptr + 8 * 7);
	__m256 _w8 = _mm256_load_ps(kptr + 8 * 8);
	__m256 _w9 = _mm256_load_ps(kptr + 8 * 9);
	__m256 _wa = _mm256_load_ps(kptr + 8 * 10);
	__m256 _wb = _mm256_load_ps(kptr + 8 * 11);
	__m256 _wc = _mm256_load_ps(kptr + 8 * 12);
	__m256 _wd = _mm256_load_ps(kptr + 8 * 13);
	__m256 _we = _mm256_load_ps(kptr + 8 * 14);
	__m256 _wf = _mm256_load_ps(kptr + 8 * 15);

	_sum0 = _mm256_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w4, _mm256_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w5, _mm256_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w6, _mm256_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w7, _mm256_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w8, _mm256_set1_ps(r2s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w9, _mm256_set1_ps(r2s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_wa, _mm256_set1_ps(r2s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wb, _mm256_set1_ps(r2s[3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_wc, _mm256_set1_ps(r3s[0]), _sum0);
	_sum1 = _mm256_fmadd_ps(_wd, _mm256_set1_ps(r3s[1]), _sum1);
	_sum2 = _mm256_fmadd_ps(_we, _mm256_set1_ps(r3s[2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wf, _mm256_set1_ps(r3s[3]), _sum3);

	kptr += 128;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr + 8 * 0);
	__m256 _w1 = _mm256_load_ps(kptr + 8 * 1);
	__m256 _w2 = _mm256_load_ps(kptr + 8 * 2);
	__m256 _w3 = _mm256_load_ps(kptr + 8 * 3);
	__m256 _w4 = _mm256_load_ps(kptr + 8 * 4);
	__m256 _w5 = _mm256_load_ps(kptr + 8 * 5);
	__m256 _w6 = _mm256_load_ps(kptr + 8 * 6);
	__m256 _w7 = _mm256_load_ps(kptr + 8 * 7);
	__m256 _w8 = _mm256_load_ps(kptr + 8 * 8);
	__m256 _w9 = _mm256_load_ps(kptr + 8 * 9);
	__m256 _wa = _mm256_load_ps(kptr + 8 * 10);
	__m256 _wb = _mm256_load_ps(kptr + 8 * 11);
	__m256 _wc = _mm256_load_ps(kptr + 8 * 12);
	__m256 _wd = _mm256_load_ps(kptr + 8 * 13);
	__m256 _we = _mm256_load_ps(kptr + 8 * 14);
	__m256 _wf = _mm256_load_ps(kptr + 8 * 15);

	_sum0 = _mm256_fmadd_ps(_w0, _mm256_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w1, _mm256_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w2, _mm256_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w3, _mm256_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w4, _mm256_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w5, _mm256_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm256_fmadd_ps(_w6, _mm256_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm256_fmadd_ps(_w7, _mm256_set1_ps(r0[sok + N * 7]), _sum3);
	_sum0 = _mm256_fmadd_ps(_w8, _mm256_set1_ps(r0[sok + N * 8]), _sum0);
	_sum1 = _mm256_fmadd_ps(_w9, _mm256_set1_ps(r0[sok + N * 9]), _sum1);
	_sum2 = _mm256_fmadd_ps(_wa, _mm256_set1_ps(r0[sok + N * 10]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wb, _mm256_set1_ps(r0[sok + N * 11]), _sum3);
	_sum0 = _mm256_fmadd_ps(_wc, _mm256_set1_ps(r0[sok + N * 12]), _sum0);
	_sum1 = _mm256_fmadd_ps(_wd, _mm256_set1_ps(r0[sok + N * 13]), _sum1);
	_sum2 = _mm256_fmadd_ps(_we, _mm256_set1_ps(r0[sok + N * 14]), _sum2);
	_sum3 = _mm256_fmadd_ps(_wf, _mm256_set1_ps(r0[sok + N * 15]), _sum3);

	kptr += 128;
	}
	}
	}
	#endif // __AVX512F__
	for (; q + 7 < inch; q += 8)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	__m256 _w2 = _mm256_load_ps(kptr + 16);
	__m256 _w3 = _mm256_load_ps(kptr + 24);
	__m256 _w4 = _mm256_load_ps(kptr + 32);
	__m256 _w5 = _mm256_load_ps(kptr + 40);
	__m256 _w6 = _mm256_load_ps(kptr + 48);
	__m256 _w7 = _mm256_load_ps(kptr + 56);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm256_comp_fmadd_ps(_w4, _mm256_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w5, _mm256_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w6, _mm256_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w7, _mm256_set1_ps(r0s[7]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	__m256 _w2 = _mm256_load_ps(kptr + 16);
	__m256 _w3 = _mm256_load_ps(kptr + 24);
	__m256 _w4 = _mm256_load_ps(kptr + 32);
	__m256 _w5 = _mm256_load_ps(kptr + 40);
	__m256 _w6 = _mm256_load_ps(kptr + 48);
	__m256 _w7 = _mm256_load_ps(kptr + 56);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm256_comp_fmadd_ps(_w4, _mm256_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w5, _mm256_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w6, _mm256_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w7, _mm256_set1_ps(r1s[3]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	__m256 _w2 = _mm256_load_ps(kptr + 16);
	__m256 _w3 = _mm256_load_ps(kptr + 24);
	__m256 _w4 = _mm256_load_ps(kptr + 32);
	__m256 _w5 = _mm256_load_ps(kptr + 40);
	__m256 _w6 = _mm256_load_ps(kptr + 48);
	__m256 _w7 = _mm256_load_ps(kptr + 56);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w2, _mm256_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w3, _mm256_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm256_comp_fmadd_ps(_w4, _mm256_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w5, _mm256_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w6, _mm256_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w7, _mm256_set1_ps(r0[sok + N * 7]), _sum3);

	kptr += 64;
	}
	}
	}
	for (; q + 3 < inch; q += 4)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	__m256 _w2 = _mm256_load_ps(kptr + 16);
	__m256 _w3 = _mm256_load_ps(kptr + 24);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w2, _mm256_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w3, _mm256_set1_ps(r0s[3]), _sum3);

	kptr += 32;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	__m256 _w2 = _mm256_load_ps(kptr + 16);
	__m256 _w3 = _mm256_load_ps(kptr + 24);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm256_comp_fmadd_ps(_w2, _mm256_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm256_comp_fmadd_ps(_w3, _mm256_set1_ps(r0[sok + N * 3]), _sum3);

	kptr += 32;
	}
	}
	}
	for (; q + 1 < inch; q += 2)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);

	_sum0 = _mm256_comp_fmadd_ps(_w0, _mm256_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm256_comp_fmadd_ps(_w1, _mm256_set1_ps(r0[sok + N]), _sum1);

	kptr += 16;
	}
	}
	}
	for (; q < inch; q++)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	__m256 _val = _mm256_set1_ps(r0[space_ofs[k]]);
	__m256 _w = _mm256_load_ps(kptr);
	_sum0 = _mm256_comp_fmadd_ps(_val, _w, _sum0);

	kptr += 8;
	}
	}
	}

	_sum0 = _mm256_add_ps(_sum0, _sum1);
	_sum2 = _mm256_add_ps(_sum2, _sum3);
	_sum0 = _mm256_add_ps(_sum0, _sum2);

	_sum0 = activation_avx(_sum0, activation_type, activation_params);

	if (out_elempack == 8)
	{
	_mm256_store_ps(outptr, _sum0);
	outptr += 8;
	}
	if (out_elempack == 4)
	{
	_mm_store_ps(outptr, _mm256_extractf128_ps(_sum0, 0));
	_mm_store_ps(outptr + M, _mm256_extractf128_ps(_sum0, 1));
	outptr += 4;
	}
	if (out_elempack == 1)
	{
	float sum[8];
	_mm256_storeu_ps(sum, _sum0);

	outptr[0] = sum[0];
	outptr[M] = sum[1];
	outptr[M * 2] = sum[2];
	outptr[M * 3] = sum[3];
	outptr[M * 4] = sum[4];
	outptr[M * 5] = sum[5];
	outptr[M * 6] = sum[6];
	outptr[M * 7] = sum[7];
	outptr += 1;
	}
	}
	}
	}
	remain_outch_start += nn_outch * 8;
	nn_outch = (outch - remain_outch_start) / 4;
	#else // __AVX__
	nn_outch = (outch - remain_outch_start) / 4;
	#pragma omp parallel for num_threads(opt.num_threads)
	#endif // __AVX__
	for (int pp = 0; pp < nn_outch; pp++)
	{
	const int p = remain_outch_start + pp * 4;

	// shadowed variable for less openmp task args
	const int elempack = bottom_blob.elempack;
	const int inch = bottom_blob.c * elempack;
	const int outw = top_blob.w;
	const int outh = top_blob.h;
	const int out_elempack = top_blob.elempack;

	float* outptr = top_blob.channel(p / out_elempack);

	for (int i = 0; i < outh; i++)
	{
	for (int j = 0; j < outw; j++)
	{
	__m128 _sum0 = _mm_setzero_ps();
	__m128 _sum1 = _mm_setzero_ps();
	__m128 _sum2 = _mm_setzero_ps();
	__m128 _sum3 = _mm_setzero_ps();

	if (bias_data_ptr)
	{
	_sum0 = _mm_loadu_ps(bias_data_ptr + p);
	}

	#if __AVX512F__
	const float* kptr = weight_data_tm.channel(p / 16 + (p % 16) / 8 + (p % 8) / 4);
	#elif __AVX__
	const float* kptr = weight_data_tm.channel(p / 8 + (p % 8) / 4);
	#else
	const float* kptr = weight_data_tm.channel(p / 4);
	#endif

	int q = 0;
	#if __AVX__
	#if __AVX512F__
	for (; q + 15 < inch; q += 16)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr + 4 * 0);
	__m128 _w1 = _mm_load_ps(kptr + 4 * 1);
	__m128 _w2 = _mm_load_ps(kptr + 4 * 2);
	__m128 _w3 = _mm_load_ps(kptr + 4 * 3);
	__m128 _w4 = _mm_load_ps(kptr + 4 * 4);
	__m128 _w5 = _mm_load_ps(kptr + 4 * 5);
	__m128 _w6 = _mm_load_ps(kptr + 4 * 6);
	__m128 _w7 = _mm_load_ps(kptr + 4 * 7);
	__m128 _w8 = _mm_load_ps(kptr + 4 * 8);
	__m128 _w9 = _mm_load_ps(kptr + 4 * 9);
	__m128 _wa = _mm_load_ps(kptr + 4 * 10);
	__m128 _wb = _mm_load_ps(kptr + 4 * 11);
	__m128 _wc = _mm_load_ps(kptr + 4 * 12);
	__m128 _wd = _mm_load_ps(kptr + 4 * 13);
	__m128 _we = _mm_load_ps(kptr + 4 * 14);
	__m128 _wf = _mm_load_ps(kptr + 4 * 15);

	_sum0 = _mm_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_w4, _mm_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm_fmadd_ps(_w5, _mm_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm_fmadd_ps(_w6, _mm_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm_fmadd_ps(_w7, _mm_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm_fmadd_ps(_w8, _mm_set1_ps(r0s[8]), _sum0);
	_sum1 = _mm_fmadd_ps(_w9, _mm_set1_ps(r0s[9]), _sum1);
	_sum2 = _mm_fmadd_ps(_wa, _mm_set1_ps(r0s[10]), _sum2);
	_sum3 = _mm_fmadd_ps(_wb, _mm_set1_ps(r0s[11]), _sum3);
	_sum0 = _mm_fmadd_ps(_wc, _mm_set1_ps(r0s[12]), _sum0);
	_sum1 = _mm_fmadd_ps(_wd, _mm_set1_ps(r0s[13]), _sum1);
	_sum2 = _mm_fmadd_ps(_we, _mm_set1_ps(r0s[14]), _sum2);
	_sum3 = _mm_fmadd_ps(_wf, _mm_set1_ps(r0s[15]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 8)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr + 4 * 0);
	__m128 _w1 = _mm_load_ps(kptr + 4 * 1);
	__m128 _w2 = _mm_load_ps(kptr + 4 * 2);
	__m128 _w3 = _mm_load_ps(kptr + 4 * 3);
	__m128 _w4 = _mm_load_ps(kptr + 4 * 4);
	__m128 _w5 = _mm_load_ps(kptr + 4 * 5);
	__m128 _w6 = _mm_load_ps(kptr + 4 * 6);
	__m128 _w7 = _mm_load_ps(kptr + 4 * 7);
	__m128 _w8 = _mm_load_ps(kptr + 4 * 8);
	__m128 _w9 = _mm_load_ps(kptr + 4 * 9);
	__m128 _wa = _mm_load_ps(kptr + 4 * 10);
	__m128 _wb = _mm_load_ps(kptr + 4 * 11);
	__m128 _wc = _mm_load_ps(kptr + 4 * 12);
	__m128 _wd = _mm_load_ps(kptr + 4 * 13);
	__m128 _we = _mm_load_ps(kptr + 4 * 14);
	__m128 _wf = _mm_load_ps(kptr + 4 * 15);

	_sum0 = _mm_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_w4, _mm_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm_fmadd_ps(_w5, _mm_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm_fmadd_ps(_w6, _mm_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm_fmadd_ps(_w7, _mm_set1_ps(r0s[7]), _sum3);
	_sum0 = _mm_fmadd_ps(_w8, _mm_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w9, _mm_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_wa, _mm_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_wb, _mm_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_wc, _mm_set1_ps(r1s[4]), _sum0);
	_sum1 = _mm_fmadd_ps(_wd, _mm_set1_ps(r1s[5]), _sum1);
	_sum2 = _mm_fmadd_ps(_we, _mm_set1_ps(r1s[6]), _sum2);
	_sum3 = _mm_fmadd_ps(_wf, _mm_set1_ps(r1s[7]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;
	const float* r2 = r0 + N * 2;
	const float* r3 = r0 + N * 3;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];
	const float* r2s = r2 + space_ofs[k];
	const float* r3s = r3 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr + 4 * 0);
	__m128 _w1 = _mm_load_ps(kptr + 4 * 1);
	__m128 _w2 = _mm_load_ps(kptr + 4 * 2);
	__m128 _w3 = _mm_load_ps(kptr + 4 * 3);
	__m128 _w4 = _mm_load_ps(kptr + 4 * 4);
	__m128 _w5 = _mm_load_ps(kptr + 4 * 5);
	__m128 _w6 = _mm_load_ps(kptr + 4 * 6);
	__m128 _w7 = _mm_load_ps(kptr + 4 * 7);
	__m128 _w8 = _mm_load_ps(kptr + 4 * 8);
	__m128 _w9 = _mm_load_ps(kptr + 4 * 9);
	__m128 _wa = _mm_load_ps(kptr + 4 * 10);
	__m128 _wb = _mm_load_ps(kptr + 4 * 11);
	__m128 _wc = _mm_load_ps(kptr + 4 * 12);
	__m128 _wd = _mm_load_ps(kptr + 4 * 13);
	__m128 _we = _mm_load_ps(kptr + 4 * 14);
	__m128 _wf = _mm_load_ps(kptr + 4 * 15);

	_sum0 = _mm_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_w4, _mm_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w5, _mm_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_w6, _mm_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_w7, _mm_set1_ps(r1s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_w8, _mm_set1_ps(r2s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_w9, _mm_set1_ps(r2s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_wa, _mm_set1_ps(r2s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_wb, _mm_set1_ps(r2s[3]), _sum3);
	_sum0 = _mm_fmadd_ps(_wc, _mm_set1_ps(r3s[0]), _sum0);
	_sum1 = _mm_fmadd_ps(_wd, _mm_set1_ps(r3s[1]), _sum1);
	_sum2 = _mm_fmadd_ps(_we, _mm_set1_ps(r3s[2]), _sum2);
	_sum3 = _mm_fmadd_ps(_wf, _mm_set1_ps(r3s[3]), _sum3);

	kptr += 64;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr + 4 * 0);
	__m128 _w1 = _mm_load_ps(kptr + 4 * 1);
	__m128 _w2 = _mm_load_ps(kptr + 4 * 2);
	__m128 _w3 = _mm_load_ps(kptr + 4 * 3);
	__m128 _w4 = _mm_load_ps(kptr + 4 * 4);
	__m128 _w5 = _mm_load_ps(kptr + 4 * 5);
	__m128 _w6 = _mm_load_ps(kptr + 4 * 6);
	__m128 _w7 = _mm_load_ps(kptr + 4 * 7);
	__m128 _w8 = _mm_load_ps(kptr + 4 * 8);
	__m128 _w9 = _mm_load_ps(kptr + 4 * 9);
	__m128 _wa = _mm_load_ps(kptr + 4 * 10);
	__m128 _wb = _mm_load_ps(kptr + 4 * 11);
	__m128 _wc = _mm_load_ps(kptr + 4 * 12);
	__m128 _wd = _mm_load_ps(kptr + 4 * 13);
	__m128 _we = _mm_load_ps(kptr + 4 * 14);
	__m128 _wf = _mm_load_ps(kptr + 4 * 15);

	_sum0 = _mm_fmadd_ps(_w0, _mm_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm_fmadd_ps(_w1, _mm_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm_fmadd_ps(_w2, _mm_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm_fmadd_ps(_w3, _mm_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm_fmadd_ps(_w4, _mm_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm_fmadd_ps(_w5, _mm_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm_fmadd_ps(_w6, _mm_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm_fmadd_ps(_w7, _mm_set1_ps(r0[sok + N * 7]), _sum3);
	_sum0 = _mm_fmadd_ps(_w8, _mm_set1_ps(r0[sok + N * 8]), _sum0);
	_sum1 = _mm_fmadd_ps(_w9, _mm_set1_ps(r0[sok + N * 9]), _sum1);
	_sum2 = _mm_fmadd_ps(_wa, _mm_set1_ps(r0[sok + N * 10]), _sum2);
	_sum3 = _mm_fmadd_ps(_wb, _mm_set1_ps(r0[sok + N * 11]), _sum3);
	_sum0 = _mm_fmadd_ps(_wc, _mm_set1_ps(r0[sok + N * 12]), _sum0);
	_sum1 = _mm_fmadd_ps(_wd, _mm_set1_ps(r0[sok + N * 13]), _sum1);
	_sum2 = _mm_fmadd_ps(_we, _mm_set1_ps(r0[sok + N * 14]), _sum2);
	_sum3 = _mm_fmadd_ps(_wf, _mm_set1_ps(r0[sok + N * 15]), _sum3);

	kptr += 64;
	}
	}
	}
	#endif // __AVX512F__
	for (; q + 7 < inch; q += 8)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	__m128 _w2 = _mm_load_ps(kptr + 8);
	__m128 _w3 = _mm_load_ps(kptr + 12);
	__m128 _w4 = _mm_load_ps(kptr + 16);
	__m128 _w5 = _mm_load_ps(kptr + 20);
	__m128 _w6 = _mm_load_ps(kptr + 24);
	__m128 _w7 = _mm_load_ps(kptr + 28);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm_comp_fmadd_ps(_w4, _mm_set1_ps(r0s[4]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w5, _mm_set1_ps(r0s[5]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w6, _mm_set1_ps(r0s[6]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w7, _mm_set1_ps(r0s[7]), _sum3);

	kptr += 32;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];
	const float* r1s = r1 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	__m128 _w2 = _mm_load_ps(kptr + 8);
	__m128 _w3 = _mm_load_ps(kptr + 12);
	__m128 _w4 = _mm_load_ps(kptr + 16);
	__m128 _w5 = _mm_load_ps(kptr + 20);
	__m128 _w6 = _mm_load_ps(kptr + 24);
	__m128 _w7 = _mm_load_ps(kptr + 28);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);
	_sum0 = _mm_comp_fmadd_ps(_w4, _mm_set1_ps(r1s[0]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w5, _mm_set1_ps(r1s[1]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w6, _mm_set1_ps(r1s[2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w7, _mm_set1_ps(r1s[3]), _sum3);

	kptr += 32;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	__m128 _w2 = _mm_load_ps(kptr + 8);
	__m128 _w3 = _mm_load_ps(kptr + 12);
	__m128 _w4 = _mm_load_ps(kptr + 16);
	__m128 _w5 = _mm_load_ps(kptr + 20);
	__m128 _w6 = _mm_load_ps(kptr + 24);
	__m128 _w7 = _mm_load_ps(kptr + 28);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w2, _mm_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w3, _mm_set1_ps(r0[sok + N * 3]), _sum3);
	_sum0 = _mm_comp_fmadd_ps(_w4, _mm_set1_ps(r0[sok + N * 4]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w5, _mm_set1_ps(r0[sok + N * 5]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w6, _mm_set1_ps(r0[sok + N * 6]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w7, _mm_set1_ps(r0[sok + N * 7]), _sum3);

	kptr += 32;
	}
	}
	}
	#endif // __AVX__
	for (; q + 3 < inch; q += 4)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const float* r0s = r0 + space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	__m128 _w2 = _mm_load_ps(kptr + 8);
	__m128 _w3 = _mm_load_ps(kptr + 12);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0s[0]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0s[1]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w2, _mm_set1_ps(r0s[2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w3, _mm_set1_ps(r0s[3]), _sum3);

	kptr += 16;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	__m128 _w2 = _mm_load_ps(kptr + 8);
	__m128 _w3 = _mm_load_ps(kptr + 12);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0[sok + N]), _sum1);
	_sum2 = _mm_comp_fmadd_ps(_w2, _mm_set1_ps(r0[sok + N * 2]), _sum2);
	_sum3 = _mm_comp_fmadd_ps(_w3, _mm_set1_ps(r0[sok + N * 3]), _sum3);

	kptr += 16;
	}
	}
	}
	for (; q + 1 < inch; q += 2)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);

	_sum0 = _mm_comp_fmadd_ps(_w0, _mm_set1_ps(r0[sok]), _sum0);
	_sum1 = _mm_comp_fmadd_ps(_w1, _mm_set1_ps(r0[sok + N]), _sum1);

	kptr += 8;
	}
	}
	}
	for (; q < inch; q++)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	__m128 _val = _mm_set1_ps(r0[space_ofs[k]]);
	__m128 _w = _mm_load_ps(kptr);
	_sum0 = _mm_comp_fmadd_ps(_val, _w, _sum0);

	kptr += 4;
	}
	}
	}

	_sum0 = _mm_add_ps(_sum0, _sum1);
	_sum2 = _mm_add_ps(_sum2, _sum3);
	_sum0 = _mm_add_ps(_sum0, _sum2);

	_sum0 = activation_sse(_sum0, activation_type, activation_params);

	if (out_elempack == 4)
	{
	_mm_storeu_ps(outptr, _sum0);
	outptr += 4;
	}
	if (out_elempack == 1)
	{
	float sum[4];
	_mm_storeu_ps(sum, _sum0);

	outptr[0] = sum[0];
	outptr[M] = sum[1];
	outptr[M * 2] = sum[2];
	outptr[M * 3] = sum[3];
	outptr += 1;
	}
	}
	}
	}
	remain_outch_start += nn_outch * 4;
	nn_outch = (outch - remain_outch_start) / 2;
	#else // __SSE2__
	nn_outch = (outch - remain_outch_start) / 2;
	#pragma omp parallel for num_threads(opt.num_threads)
	#endif // __SSE2__
	for (int pp = 0; pp < nn_outch; pp++)
	{
	const int p = remain_outch_start + pp * 2;

	// shadowed variable for less openmp task args
	const int elempack = bottom_blob.elempack;
	const int inch = bottom_blob.c * elempack;
	const int outw = top_blob.w;
	const int outh = top_blob.h;

	float* outptr0 = top_blob.channel(p);
	float* outptr1 = top_blob.channel(p + 1);

	for (int i = 0; i < outh; i++)
	{
	for (int j = 0; j < outw; j++)
	{
	float sum0 = 0.f;
	float sum1 = 0.f;

	if (bias_data_ptr)
	{
	sum0 = bias_data_ptr[p];
	sum1 = bias_data_ptr[p + 1];
	}

	#if __AVX512F__
	const float* kptr = weight_data_tm.channel(p / 16 + (p % 16) / 8 + (p % 8) / 4 + (p % 4) / 2);
	#elif __AVX__
	const float* kptr = weight_data_tm.channel(p / 8 + (p % 8) / 4 + (p % 4) / 2);
	#elif __SSE2__
	const float* kptr = weight_data_tm.channel(p / 4 + (p % 4) / 2);
	#else
	const float* kptr = weight_data_tm.channel(p / 2);
	#endif

	int q = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	__m512 _sum0_avx512 = _mm512_setzero_ps();
	__m512 _sum1_avx512 = _mm512_setzero_ps();
	for (; q + 15 < inch; q += 16)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_load_ps(r0 + sok);
	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	_sum0_avx512 = _mm512_fmadd_ps(_r0, _w0, _sum0_avx512);
	_sum1_avx512 = _mm512_fmadd_ps(_r0, _w1, _sum1_avx512);

	kptr += 32;
	}
	}
	if (elempack == 8)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_load_ps(r0 + sok)), _mm256_load_ps(r1 + sok), 1);
	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	_sum0_avx512 = _mm512_fmadd_ps(_r0, _w0, _sum0_avx512);
	_sum1_avx512 = _mm512_fmadd_ps(_r0, _w1, _sum1_avx512);

	kptr += 32;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;
	const float* r2 = r0 + N * 2;
	const float* r3 = r0 + N * 3;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r0 + sok)), _mm_load_ps(r1 + sok), 1)), _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r2 + sok)), _mm_load_ps(r3 + sok), 1), 1);
	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	_sum0_avx512 = _mm512_fmadd_ps(_r0, _w0, _sum0_avx512);
	_sum1_avx512 = _mm512_fmadd_ps(_r0, _w1, _sum1_avx512);

	kptr += 32;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_set_ps(r0[sok + N * 15], r0[sok + N * 14], r0[sok + N * 13], r0[sok + N * 12], r0[sok + N * 11], r0[sok + N * 10], r0[sok + N * 9], r0[sok + N * 8], r0[sok + N * 7], r0[sok + N * 6], r0[sok + N * 5], r0[sok + N * 4], r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m512 _w0 = _mm512_load_ps(kptr);
	__m512 _w1 = _mm512_load_ps(kptr + 16);
	_sum0_avx512 = _mm512_fmadd_ps(_r0, _w0, _sum0_avx512);
	_sum1_avx512 = _mm512_fmadd_ps(_r0, _w1, _sum1_avx512);

	kptr += 32;
	}
	}
	}
	sum0 += _mm512_comp_reduce_add_ps(_sum0_avx512);
	sum1 += _mm512_comp_reduce_add_ps(_sum1_avx512);
	#endif // __AVX512F__
	__m256 _sum0_avx = _mm256_setzero_ps();
	__m256 _sum1_avx = _mm256_setzero_ps();
	for (; q + 7 < inch; q += 8)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_load_ps(r0 + sok);
	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	_sum0_avx = _mm256_comp_fmadd_ps(_r0, _w0, _sum0_avx);
	_sum1_avx = _mm256_comp_fmadd_ps(_r0, _w1, _sum1_avx);

	kptr += 16;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r0 + sok)), _mm_load_ps(r1 + sok), 1);
	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	_sum0_avx = _mm256_comp_fmadd_ps(_r0, _w0, _sum0_avx);
	_sum1_avx = _mm256_comp_fmadd_ps(_r0, _w1, _sum1_avx);

	kptr += 16;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_set_ps(r0[sok + N * 7], r0[sok + N * 6], r0[sok + N * 5], r0[sok + N * 4], r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m256 _w0 = _mm256_load_ps(kptr);
	__m256 _w1 = _mm256_load_ps(kptr + 8);
	_sum0_avx = _mm256_comp_fmadd_ps(_r0, _w0, _sum0_avx);
	_sum1_avx = _mm256_comp_fmadd_ps(_r0, _w1, _sum1_avx);

	kptr += 16;
	}
	}
	}
	sum0 += _mm256_reduce_add_ps(_sum0_avx);
	sum1 += _mm256_reduce_add_ps(_sum1_avx);
	#endif // __AVX__
	__m128 _sum0 = _mm_setzero_ps();
	__m128 _sum1 = _mm_setzero_ps();
	for (; q + 3 < inch; q += 4)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m128 _r0 = _mm_load_ps(r0 + sok);
	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	_sum0 = _mm_comp_fmadd_ps(_r0, _w0, _sum0);
	_sum1 = _mm_comp_fmadd_ps(_r0, _w1, _sum1);

	kptr += 8;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m128 _r0 = _mm_set_ps(r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m128 _w0 = _mm_load_ps(kptr);
	__m128 _w1 = _mm_load_ps(kptr + 4);
	_sum0 = _mm_comp_fmadd_ps(_r0, _w0, _sum0);
	_sum1 = _mm_comp_fmadd_ps(_r0, _w1, _sum1);

	kptr += 8;
	}
	}
	}
	sum0 += _mm_reduce_add_ps(_sum0);
	sum1 += _mm_reduce_add_ps(_sum1);
	#endif // __SSE2__
	for (; q + 1 < inch; q += 2)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	sum0 += r0[sok] * kptr[0];
	sum1 += r0[sok] * kptr[1];
	sum0 += r0[sok + N] * kptr[2];
	sum1 += r0[sok + N] * kptr[3];

	kptr += 4;
	}
	}
	}
	for (; q < inch; q++)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	float val = r0[space_ofs[k]];
	sum0 += val * kptr[0];
	sum1 += val * kptr[1];

	kptr += 2;
	}
	}
	}

	sum0 = activation_ss(sum0, activation_type, activation_params);
	sum1 = activation_ss(sum1, activation_type, activation_params);

	outptr0[0] = sum0;
	outptr1[0] = sum1;
	outptr0 += 1;
	outptr1 += 1;
	}
	}
	}
	remain_outch_start += nn_outch * 2;
	for (int p = remain_outch_start; p < outch; p++)
	{
	float* outptr = top_blob.channel(p);

	for (int i = 0; i < outh; i++)
	{
	for (int j = 0; j < outw; j++)
	{
	float sum = 0.f;

	if (bias_data_ptr)
	{
	sum = bias_data_ptr[p];
	}

	#if __AVX512F__
	const float* kptr = weight_data_tm.channel(p / 16 + (p % 16) / 8 + (p % 8) / 4 + (p % 4) / 2 + p % 2);
	#elif __AVX__
	const float* kptr = weight_data_tm.channel(p / 8 + (p % 8) / 4 + (p % 4) / 2 + p % 2);
	#elif __SSE2__
	const float* kptr = weight_data_tm.channel(p / 4 + (p % 4) / 2 + p % 2);
	#else
	const float* kptr = weight_data_tm.channel(p / 2 + p % 2);
	#endif

	int q = 0;
	#if __SSE2__
	#if __AVX__
	#if __AVX512F__
	__m512 _sum_avx512 = _mm512_setzero_ps();
	for (; q + 15 < inch; q += 16)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 16)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_load_ps(r0 + sok);
	__m512 _w = _mm512_load_ps(kptr);
	_sum_avx512 = _mm512_fmadd_ps(_r0, _w, _sum_avx512);

	kptr += 16;
	}
	}
	if (elempack == 8)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_load_ps(r0 + sok)), _mm256_load_ps(r1 + sok), 1);
	__m512 _w = _mm512_load_ps(kptr);
	_sum_avx512 = _mm512_fmadd_ps(_r0, _w, _sum_avx512);

	kptr += 16;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;
	const float* r2 = r0 + N * 2;
	const float* r3 = r0 + N * 3;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_insertf32x8(_mm512_castps256_ps512(_mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r0 + sok)), _mm_load_ps(r1 + sok), 1)), _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r2 + sok)), _mm_load_ps(r3 + sok), 1), 1);
	__m512 _w = _mm512_load_ps(kptr);
	_sum_avx512 = _mm512_fmadd_ps(_r0, _w, _sum_avx512);

	kptr += 16;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m512 _r0 = _mm512_set_ps(r0[sok + N * 15], r0[sok + N * 14], r0[sok + N * 13], r0[sok + N * 12], r0[sok + N * 11], r0[sok + N * 10], r0[sok + N * 9], r0[sok + N * 8], r0[sok + N * 7], r0[sok + N * 6], r0[sok + N * 5], r0[sok + N * 4], r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m512 _w = _mm512_load_ps(kptr);
	_sum_avx512 = _mm512_fmadd_ps(_r0, _w, _sum_avx512);

	kptr += 16;
	}
	}
	}
	sum += _mm512_comp_reduce_add_ps(_sum_avx512);
	#endif // __AVX512F__
	__m256 _sum_avx = _mm256_setzero_ps();
	for (; q + 7 < inch; q += 8)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 8)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_load_ps(r0 + sok);
	__m256 _w = _mm256_load_ps(kptr);
	_sum_avx = _mm256_comp_fmadd_ps(_r0, _w, _sum_avx);

	kptr += 8;
	}
	}
	if (elempack == 4)
	{
	const float* r1 = r0 + N;

	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_insertf128_ps(_mm256_castps128_ps256(_mm_load_ps(r0 + sok)), _mm_load_ps(r1 + sok), 1);
	__m256 _w = _mm256_load_ps(kptr);
	_sum_avx = _mm256_comp_fmadd_ps(_r0, _w, _sum_avx);

	kptr += 8;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m256 _r0 = _mm256_set_ps(r0[sok + N * 7], r0[sok + N * 6], r0[sok + N * 5], r0[sok + N * 4], r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m256 _w = _mm256_load_ps(kptr);
	_sum_avx = _mm256_comp_fmadd_ps(_r0, _w, _sum_avx);

	kptr += 8;
	}
	}
	}
	sum += _mm256_reduce_add_ps(_sum_avx);
	#endif // __AVX__
	__m128 _sum = _mm_setzero_ps();
	for (; q + 3 < inch; q += 4)
	{
	const float* r0 = bottom_blob.channel(q / elempack).row(i * stride_h) + j * stride_w * elempack;

	if (elempack == 4)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m128 _r0 = _mm_load_ps(r0 + sok);
	__m128 _w = _mm_load_ps(kptr);
	_sum = _mm_comp_fmadd_ps(_r0, _w, _sum);

	kptr += 4;
	}
	}
	if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];
	__m128 _r0 = _mm_set_ps(r0[sok + N * 3], r0[sok + N * 2], r0[sok + N], r0[sok]);
	__m128 _w = _mm_load_ps(kptr);
	_sum = _mm_comp_fmadd_ps(_r0, _w, _sum);

	kptr += 4;
	}
	}
	}
	sum += _mm_reduce_add_ps(_sum);
	#endif // __SSE2__
	for (; q + 1 < inch; q += 2)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	const int sok = space_ofs[k];

	sum += r0[sok] * kptr[0];
	sum += r0[sok + N] * kptr[1];

	kptr += 2;
	}
	}
	}
	for (; q < inch; q++)
	{
	const float* r0 = bottom_blob.channel(q).row(i * stride_h) + j * stride_w;

	// if (elempack == 1)
	{
	for (int k = 0; k < maxk; k++)
	{
	float val = r0[space_ofs[k]];
	sum += val * kptr[0];

	kptr += 1;
	}
	}
	}

	sum = activation_ss(sum, activation_type, activation_params);

	outptr[0] = sum;
	outptr += 1;
	}
	}
	}
	}