// Auto-generated file. Do not edit!
//   Template: src/qs8-igemm/c8-neoni8mm.c.in
//   Generator: tools/xngen
//
// Copyright 2023 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/igemm.h>
#include <xnnpack/intrinsics-polyfill.h>
#include <xnnpack/math.h>


void xnn_qs8_qc8w_igemm_minmax_fp32_ukernel_4x8c8__neoni8mm(
    size_t mr,
    size_t nc,
    size_t kc,
    size_t ks,
    const int8_t** restrict a,
    const void* restrict w,
    int8_t* restrict c,
    size_t cm_stride,
    size_t cn_stride,
    size_t a_offset,
    const int8_t* zero,
    const union xnn_qs8_qc8w_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(mr != 0);
  assert(mr <= 4);
  assert(nc != 0);
  assert(kc != 0);
  assert(ks != 0);
  assert(ks % (4 * sizeof(void*)) == 0);
  assert(a_offset % sizeof(int8_t) == 0);
  assert(a != NULL);
  assert(w != NULL);
  assert(c != NULL);

  kc = round_up_po2(kc, 8 * sizeof(int8_t));
  int8_t* c0 = c;
  int8_t* c1 = (int8_t*) ((uintptr_t) c0 + cm_stride);
  if XNN_UNPREDICTABLE(mr < 2) {
    c1 = c0;
  }
  int8_t* c2 = (int8_t*) ((uintptr_t) c1 + cm_stride);
  if XNN_UNPREDICTABLE(mr <= 2) {
    c2 = c1;
  }
  int8_t* c3 = (int8_t*) ((uintptr_t) c2 + cm_stride);
  if XNN_UNPREDICTABLE(mr != 4) {
    c3 = c2;
  }

  do {
    #if XNN_ARCH_ARM64
      const uint64x2x2_t vbias01x0123 = vld2q_dup_u64(w); w = (const int32_t*) w + 4;
      const uint64x2x2_t vbias01x4567 = vld2q_dup_u64(w); w = (const int32_t*) w + 4;
    #else
      uint64x2x2_t vbias01x0123;
      vbias01x0123.val[0] = vld1q_dup_u64(w); w = (const int32_t*) w + 2;
      vbias01x0123.val[1] = vld1q_dup_u64(w); w = (const int32_t*) w + 2;
      uint64x2x2_t vbias01x4567;
      vbias01x4567.val[0] = vld1q_dup_u64(w); w = (const int32_t*) w + 2;
      vbias01x4567.val[1] = vld1q_dup_u64(w); w = (const int32_t*) w + 2;
    #endif
    int32x4_t vacc01x01 = vreinterpretq_s32_u64(vbias01x0123.val[0]);
    int32x4_t vacc01x23 = vreinterpretq_s32_u64(vbias01x0123.val[1]);
    int32x4_t vacc01x45 = vreinterpretq_s32_u64(vbias01x4567.val[0]);
    int32x4_t vacc01x67 = vreinterpretq_s32_u64(vbias01x4567.val[1]);
    int32x4_t vacc23x01 = vreinterpretq_s32_u64(vbias01x0123.val[0]);
    int32x4_t vacc23x23 = vreinterpretq_s32_u64(vbias01x0123.val[1]);
    int32x4_t vacc23x45 = vreinterpretq_s32_u64(vbias01x4567.val[0]);
    int32x4_t vacc23x67 = vreinterpretq_s32_u64(vbias01x4567.val[1]);

    size_t p = ks;
    do {
      const int8_t* restrict a0 = a[0];
      if XNN_UNPREDICTABLE(a0 != zero) {
        a0 = (const int8_t*) ((uintptr_t) a0 + a_offset);
      }
      const int8_t* restrict a1 = a[1];
      if XNN_UNPREDICTABLE(a1 != zero) {
        a1 = (const int8_t*) ((uintptr_t) a1 + a_offset);
      }
      const int8_t* restrict a2 = a[2];
      if XNN_UNPREDICTABLE(a2 != zero) {
        a2 = (const int8_t*) ((uintptr_t) a2 + a_offset);
      }
      const int8_t* restrict a3 = a[3];
      if XNN_UNPREDICTABLE(a3 != zero) {
        a3 = (const int8_t*) ((uintptr_t) a3 + a_offset);
      }
      a += 4;

      uint64x2x2_t va01x0123456789ABCDEF;
      va01x0123456789ABCDEF.val[0] = vdupq_n_u64(0);
      va01x0123456789ABCDEF.val[1] = vdupq_n_u64(0);
      uint64x2x2_t va23x0123456789ABCDEF;
      va23x0123456789ABCDEF.val[0] = vdupq_n_u64(0);
      va23x0123456789ABCDEF.val[1] = vdupq_n_u64(0);

      // Inner accumulation loop along the 8 columns.
      size_t k = kc;
      // 2x partial unrolled loop to load 8 bytes at a time.
      while (k >= 16 * sizeof(int8_t)) {
        // Load a 4x16 block of activations.
        #if XNN_ARCH_ARM64
          va01x0123456789ABCDEF = vld2q_lane_u64((const void*) a0, va01x0123456789ABCDEF, 0); a0 += 16;
          va23x0123456789ABCDEF = vld2q_lane_u64((const void*) a2, va23x0123456789ABCDEF, 0); a2 += 16;
          va01x0123456789ABCDEF = vld2q_lane_u64((const void*) a1, va01x0123456789ABCDEF, 1); a1 += 16;
          va23x0123456789ABCDEF = vld2q_lane_u64((const void*) a3, va23x0123456789ABCDEF, 1); a3 += 16;
        #else
          va01x0123456789ABCDEF.val[0] = vld1q_lane_u64((const void*) a0, va01x0123456789ABCDEF.val[0], 0); a0 += 8;
          va01x0123456789ABCDEF.val[1] = vld1q_lane_u64((const void*) a0, va01x0123456789ABCDEF.val[1], 0); a0 += 8;
          va23x0123456789ABCDEF.val[0] = vld1q_lane_u64((const void*) a2, va23x0123456789ABCDEF.val[0], 0); a2 += 8;
          va23x0123456789ABCDEF.val[1] = vld1q_lane_u64((const void*) a2, va23x0123456789ABCDEF.val[1], 0); a2 += 8;
          va01x0123456789ABCDEF.val[0] = vld1q_lane_u64((const void*) a1, va01x0123456789ABCDEF.val[0], 1); a1 += 8;
          va01x0123456789ABCDEF.val[1] = vld1q_lane_u64((const void*) a1, va01x0123456789ABCDEF.val[1], 1); a1 += 8;
          va23x0123456789ABCDEF.val[0] = vld1q_lane_u64((const void*) a3, va23x0123456789ABCDEF.val[0], 1); a3 += 8;
          va23x0123456789ABCDEF.val[1] = vld1q_lane_u64((const void*) a3, va23x0123456789ABCDEF.val[1], 1); a3 += 8;
        #endif

        // Load a 16x8 block of weights.
        const int8x16_t vb01x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb23x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb45x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb67x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb01x89ABCDEF = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb23x89ABCDEF = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb45x89ABCDEF = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb67x89ABCDEF = vld1q_s8(w); w = (const int8_t*) w + 16;

        // Multiply-accumulate: 4x16 * 16x8 --> 4x8.
        vacc01x01 = vmmlaq_s32(vacc01x01, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[0]), vb01x01234567);
        vacc01x23 = vmmlaq_s32(vacc01x23, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[0]), vb23x01234567);
        vacc01x45 = vmmlaq_s32(vacc01x45, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[0]), vb45x01234567);
        vacc01x67 = vmmlaq_s32(vacc01x67, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[0]), vb67x01234567);
        vacc23x01 = vmmlaq_s32(vacc23x01, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[0]), vb01x01234567);
        vacc23x23 = vmmlaq_s32(vacc23x23, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[0]), vb23x01234567);
        vacc23x45 = vmmlaq_s32(vacc23x45, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[0]), vb45x01234567);
        vacc23x67 = vmmlaq_s32(vacc23x67, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[0]), vb67x01234567);
        vacc01x01 = vmmlaq_s32(vacc01x01, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[1]), vb01x89ABCDEF);
        vacc01x23 = vmmlaq_s32(vacc01x23, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[1]), vb23x89ABCDEF);
        vacc01x45 = vmmlaq_s32(vacc01x45, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[1]), vb45x89ABCDEF);
        vacc01x67 = vmmlaq_s32(vacc01x67, vreinterpretq_s8_u64(va01x0123456789ABCDEF.val[1]), vb67x89ABCDEF);
        vacc23x01 = vmmlaq_s32(vacc23x01, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[1]), vb01x89ABCDEF);
        vacc23x23 = vmmlaq_s32(vacc23x23, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[1]), vb23x89ABCDEF);
        vacc23x45 = vmmlaq_s32(vacc23x45, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[1]), vb45x89ABCDEF);
        vacc23x67 = vmmlaq_s32(vacc23x67, vreinterpretq_s8_u64(va23x0123456789ABCDEF.val[1]), vb67x89ABCDEF);

        k -= 16 * sizeof(int8_t);
      }
      // Handle up to 8 final positions of `k`
      if XNN_UNLIKELY(k != 0) {
        // Load a 4x8 block of activations.
        uint64x2_t va01x01234567 = vld1q_dup_u64((const void*) a0); a0 += 8;
        uint64x2_t va23x01234567 = vld1q_dup_u64((const void*) a2); a2 += 8;
        va01x01234567 = vld1q_lane_u64((const void*) a1, va01x01234567, 1); a1 += 8;
        va23x01234567 = vld1q_lane_u64((const void*) a3, va23x01234567, 1); a3 += 8;

        // Load a 16x8 block of weights.
        const int8x16_t vb01x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb23x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb45x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;
        const int8x16_t vb67x01234567 = vld1q_s8(w); w = (const int8_t*) w + 16;

        // Multiply-accumulate: 4x4 * 4x8 --> 4x8.
        vacc01x01 = vmmlaq_s32(vacc01x01, vreinterpretq_s8_u64(va01x01234567), vb01x01234567);
        vacc01x23 = vmmlaq_s32(vacc01x23, vreinterpretq_s8_u64(va01x01234567), vb23x01234567);
        vacc01x45 = vmmlaq_s32(vacc01x45, vreinterpretq_s8_u64(va01x01234567), vb45x01234567);
        vacc01x67 = vmmlaq_s32(vacc01x67, vreinterpretq_s8_u64(va01x01234567), vb67x01234567);
        vacc23x01 = vmmlaq_s32(vacc23x01, vreinterpretq_s8_u64(va23x01234567), vb01x01234567);
        vacc23x23 = vmmlaq_s32(vacc23x23, vreinterpretq_s8_u64(va23x01234567), vb23x01234567);
        vacc23x45 = vmmlaq_s32(vacc23x45, vreinterpretq_s8_u64(va23x01234567), vb45x01234567);
        vacc23x67 = vmmlaq_s32(vacc23x67, vreinterpretq_s8_u64(va23x01234567), vb67x01234567);
      }

      p -= 4 * sizeof(void*);
    } while (p != 0);

    int32x4_t vacc0x0123 = vcombine_s32(vget_low_s32(vacc01x01), vget_low_s32(vacc01x23));
    int32x4_t vacc1x0123 = vcombine_s32(vget_high_s32(vacc01x01), vget_high_s32(vacc01x23));
    int32x4_t vacc0x4567 = vcombine_s32(vget_low_s32(vacc01x45), vget_low_s32(vacc01x67));
    int32x4_t vacc1x4567 = vcombine_s32(vget_high_s32(vacc01x45), vget_high_s32(vacc01x67));
    int32x4_t vacc2x0123 = vcombine_s32(vget_low_s32(vacc23x01), vget_low_s32(vacc23x23));
    int32x4_t vacc3x0123 = vcombine_s32(vget_high_s32(vacc23x01), vget_high_s32(vacc23x23));
    int32x4_t vacc2x4567 = vcombine_s32(vget_low_s32(vacc23x45), vget_low_s32(vacc23x67));
    int32x4_t vacc3x4567 = vcombine_s32(vget_high_s32(vacc23x45), vget_high_s32(vacc23x67));

    float32x4_t vfpacc0x0123 = vcvtq_f32_s32(vacc0x0123);
    float32x4_t vfpacc0x4567 = vcvtq_f32_s32(vacc0x4567);
    float32x4_t vfpacc1x0123 = vcvtq_f32_s32(vacc1x0123);
    float32x4_t vfpacc1x4567 = vcvtq_f32_s32(vacc1x4567);
    float32x4_t vfpacc2x0123 = vcvtq_f32_s32(vacc2x0123);
    float32x4_t vfpacc2x4567 = vcvtq_f32_s32(vacc2x4567);
    float32x4_t vfpacc3x0123 = vcvtq_f32_s32(vacc3x0123);
    float32x4_t vfpacc3x4567 = vcvtq_f32_s32(vacc3x4567);

    const float32x4_t vscale0123 = vld1q_f32((const float*) w); w = (const float*) w + 4;
    vfpacc0x0123 = vmulq_f32(vfpacc0x0123, vscale0123);
    vfpacc1x0123 = vmulq_f32(vfpacc1x0123, vscale0123);
    vfpacc2x0123 = vmulq_f32(vfpacc2x0123, vscale0123);
    vfpacc3x0123 = vmulq_f32(vfpacc3x0123, vscale0123);
    const float32x4_t vscale4567 = vld1q_f32((const float*) w); w = (const float*) w + 4;
    vfpacc0x4567 = vmulq_f32(vfpacc0x4567, vscale4567);
    vfpacc1x4567 = vmulq_f32(vfpacc1x4567, vscale4567);
    vfpacc2x4567 = vmulq_f32(vfpacc2x4567, vscale4567);
    vfpacc3x4567 = vmulq_f32(vfpacc3x4567, vscale4567);

    vacc0x0123 = vcvtnq_s32_f32(vfpacc0x0123);
    vacc0x4567 = vcvtnq_s32_f32(vfpacc0x4567);
    vacc1x0123 = vcvtnq_s32_f32(vfpacc1x0123);
    vacc1x4567 = vcvtnq_s32_f32(vfpacc1x4567);
    vacc2x0123 = vcvtnq_s32_f32(vfpacc2x0123);
    vacc2x4567 = vcvtnq_s32_f32(vfpacc2x4567);
    vacc3x0123 = vcvtnq_s32_f32(vfpacc3x0123);
    vacc3x4567 = vcvtnq_s32_f32(vfpacc3x4567);

    const int16x8_t voutput_zero_point = vld1q_dup_s16(&params->fp32_neonv8.output_zero_point);
    #if XNN_ARCH_ARM64
      const int16x8_t vacc0x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc0x0123), vacc0x4567), voutput_zero_point);
      const int16x8_t vacc1x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc1x0123), vacc1x4567), voutput_zero_point);
      const int16x8_t vacc2x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc2x0123), vacc2x4567), voutput_zero_point);
      const int16x8_t vacc3x01234567 = vqaddq_s16(vqmovn_high_s32(vqmovn_s32(vacc3x0123), vacc3x4567), voutput_zero_point);

      int8x16_t vout0x01234567_1x01234567 = vqmovn_high_s16(vqmovn_s16(vacc0x01234567), vacc1x01234567);
      int8x16_t vout2x01234567_3x01234567 = vqmovn_high_s16(vqmovn_s16(vacc2x01234567), vacc3x01234567);
    #else
      const int16x8_t vacc0x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc0x0123), vqmovn_s32(vacc0x4567)), voutput_zero_point);
      const int16x8_t vacc1x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc1x0123), vqmovn_s32(vacc1x4567)), voutput_zero_point);
      const int16x8_t vacc2x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc2x0123), vqmovn_s32(vacc2x4567)), voutput_zero_point);
      const int16x8_t vacc3x01234567 = vqaddq_s16(vcombine_s16(vqmovn_s32(vacc3x0123), vqmovn_s32(vacc3x4567)), voutput_zero_point);

      int8x16_t vout0x01234567_1x01234567 = vcombine_s8(vqmovn_s16(vacc0x01234567), vqmovn_s16(vacc1x01234567));
      int8x16_t vout2x01234567_3x01234567 = vcombine_s8(vqmovn_s16(vacc2x01234567), vqmovn_s16(vacc3x01234567));
    #endif
    const int8x16_t voutput_min = vld1q_dup_s8(&params->fp32_neonv8.output_min);
    const int8x16_t voutput_max = vld1q_dup_s8(&params->fp32_neonv8.output_max);

    vout2x01234567_3x01234567 = vmaxq_s8(vout2x01234567_3x01234567, voutput_min);
    vout0x01234567_1x01234567 = vmaxq_s8(vout0x01234567_1x01234567, voutput_min);

    vout2x01234567_3x01234567 = vminq_s8(vout2x01234567_3x01234567, voutput_max);
    vout0x01234567_1x01234567 = vminq_s8(vout0x01234567_1x01234567, voutput_max);

    if (nc >= 8) {
      vst1_s8(c3, vget_high_s8(vout2x01234567_3x01234567));
      vst1_s8(c2, vget_low_s8(vout2x01234567_3x01234567));
      vst1_s8(c1, vget_high_s8(vout0x01234567_1x01234567));
      vst1_s8(c0, vget_low_s8(vout0x01234567_1x01234567));

      c3 = (int8_t*) ((uintptr_t) c3 + cn_stride);
      c2 = (int8_t*) ((uintptr_t) c2 + cn_stride);
      c1 = (int8_t*) ((uintptr_t) c1 + cn_stride);
      c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);

      a = (const int8_t**restrict) ((uintptr_t) a - ks);

      nc -= 8;
    } else {
      if (nc & 4) {
        vst1q_lane_u32((void*) c3, vreinterpretq_u32_s8(vout2x01234567_3x01234567), 2); c3 += 4;
        vst1q_lane_u32((void*) c2, vreinterpretq_u32_s8(vout2x01234567_3x01234567), 0); c2 += 4;
        vst1q_lane_u32((void*) c1, vreinterpretq_u32_s8(vout0x01234567_1x01234567), 2); c1 += 4;
        vst1q_lane_u32((void*) c0, vreinterpretq_u32_s8(vout0x01234567_1x01234567), 0); c0 += 4;
        vout2x01234567_3x01234567 = vextq_s8(vout2x01234567_3x01234567, vout2x01234567_3x01234567, 4);
        vout0x01234567_1x01234567 = vextq_s8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 4);
      }
      if (nc & 2) {
        vst1q_lane_u16((void*) c3, vreinterpretq_u16_s8(vout2x01234567_3x01234567), 4); c3 += 2;
        vst1q_lane_u16((void*) c2, vreinterpretq_u16_s8(vout2x01234567_3x01234567), 0); c2 += 2;
        vst1q_lane_u16((void*) c1, vreinterpretq_u16_s8(vout0x01234567_1x01234567), 4); c1 += 2;
        vst1q_lane_u16((void*) c0, vreinterpretq_u16_s8(vout0x01234567_1x01234567), 0); c0 += 2;
        vout2x01234567_3x01234567 = vextq_s8(vout2x01234567_3x01234567, vout2x01234567_3x01234567, 2);
        vout0x01234567_1x01234567 = vextq_s8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 2);
      }
      if (nc & 1) {
        vst1q_lane_s8(c3, vout2x01234567_3x01234567, 8);
        vst1q_lane_s8(c2, vout2x01234567_3x01234567, 0);
        vst1q_lane_s8(c1, vout0x01234567_1x01234567, 8);
        vst1q_lane_s8(c0, vout0x01234567_1x01234567, 0);
      }

      nc = 0;
    }
  } while (nc != 0);
}
