src/qu8-avgpool/9x-minmax-neon-c8.c - platform/external/XNNPACK - Gitiles

 // Copyright (c) Facebook, Inc. and its affiliates.
 // All rights reserved.
 //
 // Copyright 2019 Google LLC
 //
 // This source code is licensed under the BSD-style license found in the
 // LICENSE file in the root directory of this source tree.

 #include <assert.h>

 #include <arm_neon.h>

 #include <xnnpack/avgpool.h>
 #include <xnnpack/common.h>


 void xnn_qu8_avgpool_minmax_ukernel_9x__neon_c8(
     size_t output_pixels,
     size_t kernel_elements,
     size_t channels,
     const uint8_t** input,
     size_t input_offset,
     const uint8_t* zero,
     uint8_t* output,
     size_t input_increment,
     size_t output_increment,
     const union xnn_qu8_avgpool_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
 {
   assert(output_pixels != 0);
   assert(kernel_elements != 0);
   assert(kernel_elements <= 9);
   assert(channels != 0);

   const int32x4_t vbias = vld1q_dup_s32(&params->neon.bias);
 #if XNN_ARCH_ARM64
   const int32x4_t vmultiplier = vld1q_dup_s32(&params->neon.multiplier);
 #else
   const int32x2_t vmultiplier = vld1_dup_s32(&params->neon.multiplier);
 #endif
   const int64x2_t vleft_shift = vld1q_dup_s64(&params->neon.left_shift);
   const int16x8_t voutput_zero_point = vld1q_dup_s16(&params->neon.output_zero_point);
   const uint8x8_t voutput_min = vld1_dup_u8(&params->neon.output_min);
   const uint8x8_t voutput_max = vld1_dup_u8(&params->neon.output_max);

   do {
     const uint8_t* i0 = input[0];
     assert(i0 != NULL);
     const uint8_t* i1 = input[1];
     const uint8_t* i2 = input[2];
     const uint8_t* i3 = input[3];
     const uint8_t* i4 = input[4];
     const uint8_t* i5 = input[5];
     const uint8_t* i6 = input[6];
     const uint8_t* i7 = input[7];
     const uint8_t* i8 = input[8];
     input = (const uint8_t**) ((uintptr_t) input + input_increment);
     if (kernel_elements < 2) {
       i1 = zero;
     }
     assert(i1 != NULL);
     if (kernel_elements <= 2) {
       i2 = zero;
     }
     assert(i2 != NULL);
     if (kernel_elements < 4) {
       i3 = zero;
     }
     assert(i3 != NULL);
     if (kernel_elements <= 4) {
       i4 = zero;
     }
     assert(i4 != NULL);
     if (kernel_elements < 6) {
       i5 = zero;
     }
     assert(i5 != NULL);
     if (kernel_elements <= 6) {
       i6 = zero;
     }
     assert(i6 != NULL);
     if (kernel_elements < 8) {
       i7 = zero;
     }
     assert(i7 != NULL);
     if (kernel_elements <= 8) {
       i8 = zero;
     }
     assert(i8 != NULL);
     if XNN_UNPREDICTABLE(i0 != zero) {
       i0 = (const uint8_t*) ((uintptr_t) i0 + input_offset);
     }
     if XNN_UNPREDICTABLE(i1 != zero) {
       i1 = (const uint8_t*) ((uintptr_t) i1 + input_offset);
     }
     if XNN_UNPREDICTABLE(i2 != zero) {
       i2 = (const uint8_t*) ((uintptr_t) i2 + input_offset);
     }
     if XNN_UNPREDICTABLE(i3 != zero) {
       i3 = (const uint8_t*) ((uintptr_t) i3 + input_offset);
     }
     if XNN_UNPREDICTABLE(i4 != zero) {
       i4 = (const uint8_t*) ((uintptr_t) i4 + input_offset);
     }
     if XNN_UNPREDICTABLE(i5 != zero) {
       i5 = (const uint8_t*) ((uintptr_t) i5 + input_offset);
     }
     if XNN_UNPREDICTABLE(i6 != zero) {
       i6 = (const uint8_t*) ((uintptr_t) i6 + input_offset);
     }
     if XNN_UNPREDICTABLE(i7 != zero) {
       i7 = (const uint8_t*) ((uintptr_t) i7 + input_offset);
     }
     if XNN_UNPREDICTABLE(i8 != zero) {
       i8 = (const uint8_t*) ((uintptr_t) i8 + input_offset);
     }

     size_t c = channels;
     while (c >= 8) {
       const uint8x8_t vi0 = vld1_u8(i0); i0 += 8;
       const uint8x8_t vi1 = vld1_u8(i1); i1 += 8;
       const uint8x8_t vi2 = vld1_u8(i2); i2 += 8;
       const uint8x8_t vi3 = vld1_u8(i3); i3 += 8;
       const uint8x8_t vi4 = vld1_u8(i4); i4 += 8;
       const uint8x8_t vi5 = vld1_u8(i5); i5 += 8;
       const uint8x8_t vi6 = vld1_u8(i6); i6 += 8;
       const uint8x8_t vi7 = vld1_u8(i7); i7 += 8;
       const uint8x8_t vi8 = vld1_u8(i8); i8 += 8;

       const uint16x8_t vsum018 = vaddw_u8(vaddl_u8(vi0, vi1), vi8);
       const uint16x8_t vsum23 = vaddl_u8(vi2, vi3);
       const uint16x8_t vsum45 = vaddl_u8(vi4, vi5);
       const uint16x8_t vsum67 = vaddl_u8(vi6, vi7);

       const uint16x8_t vsum2345 = vaddq_u16(vsum23, vsum45);
       const uint16x8_t vsum01678 = vaddq_u16(vsum018, vsum67);
       const uint16x8_t vsum = vaddq_u16(vsum2345, vsum01678);

       int32x4_t vacc_lo = vaddw_s16(vbias, vreinterpret_s16_u16(vget_low_u16(vsum)));
       int32x4_t vacc_hi = vaddw_s16(vbias, vreinterpret_s16_u16(vget_high_u16(vsum)));

       const int32x4_t vneg_mask_lo = vreinterpretq_s32_u32(vcltq_s32(vacc_lo, vmovq_n_s32(0)));
       const int32x4_t vneg_mask_hi = vreinterpretq_s32_u32(vcltq_s32(vacc_hi, vmovq_n_s32(0)));

 #if XNN_ARCH_ARM64
       const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vget_low_s32(vmultiplier));
       const int64x2_t vproduct23 = vmull_high_s32(vacc_lo, vmultiplier);
       const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vget_low_s32(vmultiplier));
       const int64x2_t vproduct67 = vmull_high_s32(vacc_hi, vmultiplier);

       const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product23 = vaddw_high_s32(vproduct23, vneg_mask_lo);
       const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
       const int64x2_t vadjusted_product67 = vaddw_high_s32(vproduct67, vneg_mask_hi);
 #else
       const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vmultiplier);
       const int64x2_t vproduct23 = vmull_s32(vget_high_s32(vacc_lo), vmultiplier);
       const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vmultiplier);
       const int64x2_t vproduct67 = vmull_s32(vget_high_s32(vacc_hi), vmultiplier);

       const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product23 = vaddw_s32(vproduct23, vget_high_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
       const int64x2_t vadjusted_product67 = vaddw_s32(vproduct67, vget_high_s32(vneg_mask_hi));
 #endif

       const int64x2_t vscaled_acc01 = vrshlq_s64(vadjusted_product01, vleft_shift);
       const int64x2_t vscaled_acc23 = vrshlq_s64(vadjusted_product23, vleft_shift);
       const int64x2_t vscaled_acc45 = vrshlq_s64(vadjusted_product45, vleft_shift);
       const int64x2_t vscaled_acc67 = vrshlq_s64(vadjusted_product67, vleft_shift);

 #if XNN_ARCH_ARM64
       vacc_lo = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc01), vreinterpretq_s32_s64(vscaled_acc23));
       vacc_hi = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc45), vreinterpretq_s32_s64(vscaled_acc67));

       const int16x8_t vacc = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc_lo), vacc_hi), voutput_zero_point);
 #else
       vacc_lo = vcombine_s32(vmovn_s64(vscaled_acc01), vmovn_s64(vscaled_acc23));
       vacc_hi = vcombine_s32(vmovn_s64(vscaled_acc45), vmovn_s64(vscaled_acc67));

       const int16x8_t vacc = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)), voutput_zero_point);
 #endif

       uint8x8_t vout = vqmovun_s16(vacc);
       vout = vmax_u8(vout, voutput_min);
       vout = vmin_u8(vout, voutput_max);

       vst1_u8(output, vout); output += 8;

       c -= 8;
     }
     if (c != 0) {
       const uint8x8_t vi0 = vld1_u8(i0);
       const uint8x8_t vi1 = vld1_u8(i1);
       const uint8x8_t vi2 = vld1_u8(i2);
       const uint8x8_t vi3 = vld1_u8(i3);
       const uint8x8_t vi4 = vld1_u8(i4);
       const uint8x8_t vi5 = vld1_u8(i5);
       const uint8x8_t vi6 = vld1_u8(i6);
       const uint8x8_t vi7 = vld1_u8(i7);
       const uint8x8_t vi8 = vld1_u8(i8);

       const uint16x8_t vsum018 = vaddw_u8(vaddl_u8(vi0, vi1), vi8);
       const uint16x8_t vsum23 = vaddl_u8(vi2, vi3);
       const uint16x8_t vsum45 = vaddl_u8(vi4, vi5);
       const uint16x8_t vsum67 = vaddl_u8(vi6, vi7);

       const uint16x8_t vsum2345 = vaddq_u16(vsum23, vsum45);
       const uint16x8_t vsum01678 = vaddq_u16(vsum018, vsum67);
       const uint16x8_t vsum = vaddq_u16(vsum2345, vsum01678);

       int32x4_t vacc_lo = vaddw_s16(vbias, vreinterpret_s16_u16(vget_low_u16(vsum)));
       int32x4_t vacc_hi = vaddw_s16(vbias, vreinterpret_s16_u16(vget_high_u16(vsum)));

       const int32x4_t vneg_mask_lo = vreinterpretq_s32_u32(vcltq_s32(vacc_lo, vmovq_n_s32(0)));
       const int32x4_t vneg_mask_hi = vreinterpretq_s32_u32(vcltq_s32(vacc_hi, vmovq_n_s32(0)));

 #if XNN_ARCH_ARM64
       const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vget_low_s32(vmultiplier));
       const int64x2_t vproduct23 = vmull_high_s32(vacc_lo, vmultiplier);
       const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vget_low_s32(vmultiplier));
       const int64x2_t vproduct67 = vmull_high_s32(vacc_hi, vmultiplier);

       const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product23 = vaddw_high_s32(vproduct23, vneg_mask_lo);
       const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
       const int64x2_t vadjusted_product67 = vaddw_high_s32(vproduct67, vneg_mask_hi);
 #else
       const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vmultiplier);
       const int64x2_t vproduct23 = vmull_s32(vget_high_s32(vacc_lo), vmultiplier);
       const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vmultiplier);
       const int64x2_t vproduct67 = vmull_s32(vget_high_s32(vacc_hi), vmultiplier);

       const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product23 = vaddw_s32(vproduct23, vget_high_s32(vneg_mask_lo));
       const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
       const int64x2_t vadjusted_product67 = vaddw_s32(vproduct67, vget_high_s32(vneg_mask_hi));
 #endif

       const int64x2_t vscaled_acc01 = vrshlq_s64(vadjusted_product01, vleft_shift);
       const int64x2_t vscaled_acc23 = vrshlq_s64(vadjusted_product23, vleft_shift);
       const int64x2_t vscaled_acc45 = vrshlq_s64(vadjusted_product45, vleft_shift);
       const int64x2_t vscaled_acc67 = vrshlq_s64(vadjusted_product67, vleft_shift);

 #if XNN_ARCH_ARM64
       vacc_lo = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc01), vreinterpretq_s32_s64(vscaled_acc23));
       vacc_hi = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc45), vreinterpretq_s32_s64(vscaled_acc67));

       const int16x8_t vacc = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc_lo), vacc_hi), voutput_zero_point);
 #else
       vacc_lo = vcombine_s32(vmovn_s64(vscaled_acc01), vmovn_s64(vscaled_acc23));
       vacc_hi = vcombine_s32(vmovn_s64(vscaled_acc45), vmovn_s64(vscaled_acc67));

       const int16x8_t vacc = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)), voutput_zero_point);
 #endif

       uint8x8_t vout = vqmovun_s16(vacc);
       vout = vmax_u8(vout, voutput_min);
       vout = vmin_u8(vout, voutput_max);

       if (c & 4) {
         vst1_lane_u32((void*) output, vreinterpret_u32_u8(vout), 0); output += 4;
         vout = vext_u8(vout, vout, 4);
       }
       if (c & 2) {
         vst1_lane_u16((void*) output, vreinterpret_u16_u8(vout), 0); output += 2;
         vout = vext_u8(vout, vout, 2);
       }
       if (c & 1) {
         vst1_lane_u8(output, vout, 0); output += 1;
       }
     }
     output = (uint8_t*) ((uintptr_t) output + output_increment);
   } while (--output_pixels != 0);
 }
	// Copyright (c) Facebook, Inc. and its affiliates.
	// All rights reserved.
	//
	// Copyright 2019 Google LLC
	//
	// This source code is licensed under the BSD-style license found in the
	// LICENSE file in the root directory of this source tree.

	#include <assert.h>

	#include <arm_neon.h>

	#include <xnnpack/avgpool.h>
	#include <xnnpack/common.h>


	void xnn_qu8_avgpool_minmax_ukernel_9x__neon_c8(
	size_t output_pixels,
	size_t kernel_elements,
	size_t channels,
	const uint8_t** input,
	size_t input_offset,
	const uint8_t* zero,
	uint8_t* output,
	size_t input_increment,
	size_t output_increment,
	const union xnn_qu8_avgpool_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
	{
	assert(output_pixels != 0);
	assert(kernel_elements != 0);
	assert(kernel_elements <= 9);
	assert(channels != 0);

	const int32x4_t vbias = vld1q_dup_s32(&params->neon.bias);
	#if XNN_ARCH_ARM64
	const int32x4_t vmultiplier = vld1q_dup_s32(&params->neon.multiplier);
	#else
	const int32x2_t vmultiplier = vld1_dup_s32(&params->neon.multiplier);
	#endif
	const int64x2_t vleft_shift = vld1q_dup_s64(&params->neon.left_shift);
	const int16x8_t voutput_zero_point = vld1q_dup_s16(&params->neon.output_zero_point);
	const uint8x8_t voutput_min = vld1_dup_u8(&params->neon.output_min);
	const uint8x8_t voutput_max = vld1_dup_u8(&params->neon.output_max);

	do {
	const uint8_t* i0 = input[0];
	assert(i0 != NULL);
	const uint8_t* i1 = input[1];
	const uint8_t* i2 = input[2];
	const uint8_t* i3 = input[3];
	const uint8_t* i4 = input[4];
	const uint8_t* i5 = input[5];
	const uint8_t* i6 = input[6];
	const uint8_t* i7 = input[7];
	const uint8_t* i8 = input[8];
	input = (const uint8_t**) ((uintptr_t) input + input_increment);
	if (kernel_elements < 2) {
	i1 = zero;
	}
	assert(i1 != NULL);
	if (kernel_elements <= 2) {
	i2 = zero;
	}
	assert(i2 != NULL);
	if (kernel_elements < 4) {
	i3 = zero;
	}
	assert(i3 != NULL);
	if (kernel_elements <= 4) {
	i4 = zero;
	}
	assert(i4 != NULL);
	if (kernel_elements < 6) {
	i5 = zero;
	}
	assert(i5 != NULL);
	if (kernel_elements <= 6) {
	i6 = zero;
	}
	assert(i6 != NULL);
	if (kernel_elements < 8) {
	i7 = zero;
	}
	assert(i7 != NULL);
	if (kernel_elements <= 8) {
	i8 = zero;
	}
	assert(i8 != NULL);
	if XNN_UNPREDICTABLE(i0 != zero) {
	i0 = (const uint8_t*) ((uintptr_t) i0 + input_offset);
	}
	if XNN_UNPREDICTABLE(i1 != zero) {
	i1 = (const uint8_t*) ((uintptr_t) i1 + input_offset);
	}
	if XNN_UNPREDICTABLE(i2 != zero) {
	i2 = (const uint8_t*) ((uintptr_t) i2 + input_offset);
	}
	if XNN_UNPREDICTABLE(i3 != zero) {
	i3 = (const uint8_t*) ((uintptr_t) i3 + input_offset);
	}
	if XNN_UNPREDICTABLE(i4 != zero) {
	i4 = (const uint8_t*) ((uintptr_t) i4 + input_offset);
	}
	if XNN_UNPREDICTABLE(i5 != zero) {
	i5 = (const uint8_t*) ((uintptr_t) i5 + input_offset);
	}
	if XNN_UNPREDICTABLE(i6 != zero) {
	i6 = (const uint8_t*) ((uintptr_t) i6 + input_offset);
	}
	if XNN_UNPREDICTABLE(i7 != zero) {
	i7 = (const uint8_t*) ((uintptr_t) i7 + input_offset);
	}
	if XNN_UNPREDICTABLE(i8 != zero) {
	i8 = (const uint8_t*) ((uintptr_t) i8 + input_offset);
	}

	size_t c = channels;
	while (c >= 8) {
	const uint8x8_t vi0 = vld1_u8(i0); i0 += 8;
	const uint8x8_t vi1 = vld1_u8(i1); i1 += 8;
	const uint8x8_t vi2 = vld1_u8(i2); i2 += 8;
	const uint8x8_t vi3 = vld1_u8(i3); i3 += 8;
	const uint8x8_t vi4 = vld1_u8(i4); i4 += 8;
	const uint8x8_t vi5 = vld1_u8(i5); i5 += 8;
	const uint8x8_t vi6 = vld1_u8(i6); i6 += 8;
	const uint8x8_t vi7 = vld1_u8(i7); i7 += 8;
	const uint8x8_t vi8 = vld1_u8(i8); i8 += 8;

	const uint16x8_t vsum018 = vaddw_u8(vaddl_u8(vi0, vi1), vi8);
	const uint16x8_t vsum23 = vaddl_u8(vi2, vi3);
	const uint16x8_t vsum45 = vaddl_u8(vi4, vi5);
	const uint16x8_t vsum67 = vaddl_u8(vi6, vi7);

	const uint16x8_t vsum2345 = vaddq_u16(vsum23, vsum45);
	const uint16x8_t vsum01678 = vaddq_u16(vsum018, vsum67);
	const uint16x8_t vsum = vaddq_u16(vsum2345, vsum01678);

	int32x4_t vacc_lo = vaddw_s16(vbias, vreinterpret_s16_u16(vget_low_u16(vsum)));
	int32x4_t vacc_hi = vaddw_s16(vbias, vreinterpret_s16_u16(vget_high_u16(vsum)));

	const int32x4_t vneg_mask_lo = vreinterpretq_s32_u32(vcltq_s32(vacc_lo, vmovq_n_s32(0)));
	const int32x4_t vneg_mask_hi = vreinterpretq_s32_u32(vcltq_s32(vacc_hi, vmovq_n_s32(0)));

	#if XNN_ARCH_ARM64
	const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vget_low_s32(vmultiplier));
	const int64x2_t vproduct23 = vmull_high_s32(vacc_lo, vmultiplier);
	const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vget_low_s32(vmultiplier));
	const int64x2_t vproduct67 = vmull_high_s32(vacc_hi, vmultiplier);

	const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product23 = vaddw_high_s32(vproduct23, vneg_mask_lo);
	const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
	const int64x2_t vadjusted_product67 = vaddw_high_s32(vproduct67, vneg_mask_hi);
	#else
	const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vmultiplier);
	const int64x2_t vproduct23 = vmull_s32(vget_high_s32(vacc_lo), vmultiplier);
	const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vmultiplier);
	const int64x2_t vproduct67 = vmull_s32(vget_high_s32(vacc_hi), vmultiplier);

	const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product23 = vaddw_s32(vproduct23, vget_high_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
	const int64x2_t vadjusted_product67 = vaddw_s32(vproduct67, vget_high_s32(vneg_mask_hi));
	#endif

	const int64x2_t vscaled_acc01 = vrshlq_s64(vadjusted_product01, vleft_shift);
	const int64x2_t vscaled_acc23 = vrshlq_s64(vadjusted_product23, vleft_shift);
	const int64x2_t vscaled_acc45 = vrshlq_s64(vadjusted_product45, vleft_shift);
	const int64x2_t vscaled_acc67 = vrshlq_s64(vadjusted_product67, vleft_shift);

	#if XNN_ARCH_ARM64
	vacc_lo = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc01), vreinterpretq_s32_s64(vscaled_acc23));
	vacc_hi = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc45), vreinterpretq_s32_s64(vscaled_acc67));

	const int16x8_t vacc = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc_lo), vacc_hi), voutput_zero_point);
	#else
	vacc_lo = vcombine_s32(vmovn_s64(vscaled_acc01), vmovn_s64(vscaled_acc23));
	vacc_hi = vcombine_s32(vmovn_s64(vscaled_acc45), vmovn_s64(vscaled_acc67));

	const int16x8_t vacc = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)), voutput_zero_point);
	#endif

	uint8x8_t vout = vqmovun_s16(vacc);
	vout = vmax_u8(vout, voutput_min);
	vout = vmin_u8(vout, voutput_max);

	vst1_u8(output, vout); output += 8;

	c -= 8;
	}
	if (c != 0) {
	const uint8x8_t vi0 = vld1_u8(i0);
	const uint8x8_t vi1 = vld1_u8(i1);
	const uint8x8_t vi2 = vld1_u8(i2);
	const uint8x8_t vi3 = vld1_u8(i3);
	const uint8x8_t vi4 = vld1_u8(i4);
	const uint8x8_t vi5 = vld1_u8(i5);
	const uint8x8_t vi6 = vld1_u8(i6);
	const uint8x8_t vi7 = vld1_u8(i7);
	const uint8x8_t vi8 = vld1_u8(i8);

	const uint16x8_t vsum018 = vaddw_u8(vaddl_u8(vi0, vi1), vi8);
	const uint16x8_t vsum23 = vaddl_u8(vi2, vi3);
	const uint16x8_t vsum45 = vaddl_u8(vi4, vi5);
	const uint16x8_t vsum67 = vaddl_u8(vi6, vi7);

	const uint16x8_t vsum2345 = vaddq_u16(vsum23, vsum45);
	const uint16x8_t vsum01678 = vaddq_u16(vsum018, vsum67);
	const uint16x8_t vsum = vaddq_u16(vsum2345, vsum01678);

	int32x4_t vacc_lo = vaddw_s16(vbias, vreinterpret_s16_u16(vget_low_u16(vsum)));
	int32x4_t vacc_hi = vaddw_s16(vbias, vreinterpret_s16_u16(vget_high_u16(vsum)));

	const int32x4_t vneg_mask_lo = vreinterpretq_s32_u32(vcltq_s32(vacc_lo, vmovq_n_s32(0)));
	const int32x4_t vneg_mask_hi = vreinterpretq_s32_u32(vcltq_s32(vacc_hi, vmovq_n_s32(0)));

	#if XNN_ARCH_ARM64
	const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vget_low_s32(vmultiplier));
	const int64x2_t vproduct23 = vmull_high_s32(vacc_lo, vmultiplier);
	const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vget_low_s32(vmultiplier));
	const int64x2_t vproduct67 = vmull_high_s32(vacc_hi, vmultiplier);

	const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product23 = vaddw_high_s32(vproduct23, vneg_mask_lo);
	const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
	const int64x2_t vadjusted_product67 = vaddw_high_s32(vproduct67, vneg_mask_hi);
	#else
	const int64x2_t vproduct01 = vmull_s32(vget_low_s32(vacc_lo), vmultiplier);
	const int64x2_t vproduct23 = vmull_s32(vget_high_s32(vacc_lo), vmultiplier);
	const int64x2_t vproduct45 = vmull_s32(vget_low_s32(vacc_hi), vmultiplier);
	const int64x2_t vproduct67 = vmull_s32(vget_high_s32(vacc_hi), vmultiplier);

	const int64x2_t vadjusted_product01 = vaddw_s32(vproduct01, vget_low_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product23 = vaddw_s32(vproduct23, vget_high_s32(vneg_mask_lo));
	const int64x2_t vadjusted_product45 = vaddw_s32(vproduct45, vget_low_s32(vneg_mask_hi));
	const int64x2_t vadjusted_product67 = vaddw_s32(vproduct67, vget_high_s32(vneg_mask_hi));
	#endif

	const int64x2_t vscaled_acc01 = vrshlq_s64(vadjusted_product01, vleft_shift);
	const int64x2_t vscaled_acc23 = vrshlq_s64(vadjusted_product23, vleft_shift);
	const int64x2_t vscaled_acc45 = vrshlq_s64(vadjusted_product45, vleft_shift);
	const int64x2_t vscaled_acc67 = vrshlq_s64(vadjusted_product67, vleft_shift);

	#if XNN_ARCH_ARM64
	vacc_lo = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc01), vreinterpretq_s32_s64(vscaled_acc23));
	vacc_hi = vuzp1q_s32(vreinterpretq_s32_s64(vscaled_acc45), vreinterpretq_s32_s64(vscaled_acc67));

	const int16x8_t vacc = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc_lo), vacc_hi), voutput_zero_point);
	#else
	vacc_lo = vcombine_s32(vmovn_s64(vscaled_acc01), vmovn_s64(vscaled_acc23));
	vacc_hi = vcombine_s32(vmovn_s64(vscaled_acc45), vmovn_s64(vscaled_acc67));

	const int16x8_t vacc = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc_lo), vqmovn_s32(vacc_hi)), voutput_zero_point);
	#endif

	uint8x8_t vout = vqmovun_s16(vacc);
	vout = vmax_u8(vout, voutput_min);
	vout = vmin_u8(vout, voutput_max);

	if (c & 4) {
	vst1_lane_u32((void*) output, vreinterpret_u32_u8(vout), 0); output += 4;
	vout = vext_u8(vout, vout, 4);
	}
	if (c & 2) {
	vst1_lane_u16((void*) output, vreinterpret_u16_u8(vout), 0); output += 2;
	vout = vext_u8(vout, vout, 2);
	}
	if (c & 1) {
	vst1_lane_u8(output, vout, 0); output += 1;
	}
	}
	output = (uint8_t*) ((uintptr_t) output + output_increment);
	} while (--output_pixels != 0);
	}