xref: /aosp_15_r20/external/XNNPACK/src/qc8-gemm/gen/2x8c2-minmax-fp32-neon-mlal-ld2r.c (revision 4bdc94577ba0e567308109d787f7fec7b531ce36)

// Auto-generated file. Do not edit!
//   Template: src/qs8-gemm/c2-neon-mull-dup.c.in
//   Generator: tools/xngen
//
// Copyright 2021 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/gemm.h>
#include <xnnpack/math.h>

void xnn_qc8_gemm_minmax_fp32_ukernel_2x8c2__neon_mlal_ld2r(
    size_t mr,
    size_t nc,
    size_t kc,
    const int8_t* restrict a,
    size_t a_stride,
    const void* restrict w,
    int8_t* restrict c,
    size_t cm_stride,
    size_t cn_stride,
    const union xnn_qc8_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(mr != 0);
  assert(mr <= 2);
  assert(nc != 0);
  assert(kc != 0);
  assert(kc % sizeof(int8_t) == 0);
  assert(a != NULL);
  assert(w != NULL);
  assert(c != NULL);

  kc = round_up_po2(kc, 2 * sizeof(int8_t));
  const int8_t* a0 = a;
  int8_t* c0 = c;
  const int8_t* a1 = (const int8_t*) ((uintptr_t) a0 + a_stride);
  int8_t* c1 = (int8_t*) ((uintptr_t) c0 + cm_stride);
  if XNN_UNPREDICTABLE(mr != 2) {
    a1 = a0;
    c1 = c0;
  }

  do {
    int32x4_t vacc0x0123 = vld1q_s32(w); w = (const void*) ((uintptr_t) w + 4 * sizeof(int32_t));
    int32x4_t vacc0x4567 = vld1q_s32(w); w = (const void*) ((uintptr_t) w + 4 * sizeof(int32_t));
    int32x4_t vacc1x0123 = vacc0x0123;
    int32x4_t vacc1x4567 = vacc0x4567;

    size_t k = kc;

    while (k >= 16 * sizeof(int8_t)) {
      const int16x4x2_t va00x0 = vld2_dup_s16((const void*)a0);
      const int16x4x2_t va01x0 = vld2_dup_s16((const void*)(a0 + 4)); a0 += 8;
      const int16x4x2_t va00x1 = vld2_dup_s16((const void*)a0);
      const int16x4x2_t va01x1 = vld2_dup_s16((const void*)(a0 + 4)); a0 += 8;
      const int16x4x2_t va10x0 = vld2_dup_s16((const void*)a1);
      const int16x4x2_t va11x0 = vld2_dup_s16((const void*)(a1 + 4)); a1 += 8;
      const int16x4x2_t va10x1 = vld2_dup_s16((const void*)a1);
      const int16x4x2_t va11x1 = vld2_dup_s16((const void*)(a1 + 4)); a1 += 8;
      const int8x8_t vb0123c0x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c0x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c1x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c1x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c2x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c2x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c3x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c3x0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));

      const int8x8_t va0c0x0 = vreinterpret_s8_s16(va00x0.val[0]);
      const int8x8_t va0c0x1 = vreinterpret_s8_s16(va00x1.val[0]);
      const int8x8_t va1c0x0 = vreinterpret_s8_s16(va10x0.val[0]);
      const int8x8_t va1c0x1 = vreinterpret_s8_s16(va10x1.val[0]);

      int16x8_t vprod0x0123c0 = vmull_s8(vb0123c0x0, va0c0x0);
      int16x8_t vprod1x0123c0 = vmull_s8(vb0123c0x0, va1c0x0);
      const int8x8_t vb0123c0x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x0123c0 = vmlal_s8(vprod0x0123c0, vb0123c0x1, va0c0x1);
      vprod1x0123c0 = vmlal_s8(vprod1x0123c0, vb0123c0x1, va1c0x1);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c0);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c0);
      int16x8_t vprod0x4567c0 = vmull_s8(vb4567c0x0, va0c0x0);
      int16x8_t vprod1x4567c0 = vmull_s8(vb4567c0x0, va1c0x0);
      const int8x8_t vb4567c0x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x4567c0 = vmlal_s8(vprod0x4567c0, vb4567c0x1, va0c0x1);
      vprod1x4567c0 = vmlal_s8(vprod1x4567c0, vb4567c0x1, va1c0x1);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c0);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c0);
      const int8x8_t va0c1x0 = vreinterpret_s8_s16(va00x0.val[1]);
      const int8x8_t va0c1x1 = vreinterpret_s8_s16(va00x1.val[1]);
      const int8x8_t va1c1x0 = vreinterpret_s8_s16(va10x0.val[1]);
      const int8x8_t va1c1x1 = vreinterpret_s8_s16(va10x1.val[1]);

      int16x8_t vprod0x0123c1 = vmull_s8(vb0123c1x0, va0c1x0);
      int16x8_t vprod1x0123c1 = vmull_s8(vb0123c1x0, va1c1x0);
      const int8x8_t vb0123c1x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x0123c1 = vmlal_s8(vprod0x0123c1, vb0123c1x1, va0c1x1);
      vprod1x0123c1 = vmlal_s8(vprod1x0123c1, vb0123c1x1, va1c1x1);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c1);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c1);
      int16x8_t vprod0x4567c1 = vmull_s8(vb4567c1x0, va0c1x0);
      int16x8_t vprod1x4567c1 = vmull_s8(vb4567c1x0, va1c1x0);
      const int8x8_t vb4567c1x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x4567c1 = vmlal_s8(vprod0x4567c1, vb4567c1x1, va0c1x1);
      vprod1x4567c1 = vmlal_s8(vprod1x4567c1, vb4567c1x1, va1c1x1);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c1);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c1);
      const int8x8_t va0c2x0 = vreinterpret_s8_s16(va01x0.val[0]);
      const int8x8_t va0c2x1 = vreinterpret_s8_s16(va01x1.val[0]);
      const int8x8_t va1c2x0 = vreinterpret_s8_s16(va11x0.val[0]);
      const int8x8_t va1c2x1 = vreinterpret_s8_s16(va11x1.val[0]);

      int16x8_t vprod0x0123c2 = vmull_s8(vb0123c2x0, va0c2x0);
      int16x8_t vprod1x0123c2 = vmull_s8(vb0123c2x0, va1c2x0);
      const int8x8_t vb0123c2x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x0123c2 = vmlal_s8(vprod0x0123c2, vb0123c2x1, va0c2x1);
      vprod1x0123c2 = vmlal_s8(vprod1x0123c2, vb0123c2x1, va1c2x1);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c2);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c2);
      int16x8_t vprod0x4567c2 = vmull_s8(vb4567c2x0, va0c2x0);
      int16x8_t vprod1x4567c2 = vmull_s8(vb4567c2x0, va1c2x0);
      const int8x8_t vb4567c2x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x4567c2 = vmlal_s8(vprod0x4567c2, vb4567c2x1, va0c2x1);
      vprod1x4567c2 = vmlal_s8(vprod1x4567c2, vb4567c2x1, va1c2x1);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c2);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c2);
      const int8x8_t va0c3x0 = vreinterpret_s8_s16(va01x0.val[1]);
      const int8x8_t va0c3x1 = vreinterpret_s8_s16(va01x1.val[1]);
      const int8x8_t va1c3x0 = vreinterpret_s8_s16(va11x0.val[1]);
      const int8x8_t va1c3x1 = vreinterpret_s8_s16(va11x1.val[1]);

      int16x8_t vprod0x0123c3 = vmull_s8(vb0123c3x0, va0c3x0);
      int16x8_t vprod1x0123c3 = vmull_s8(vb0123c3x0, va1c3x0);
      const int8x8_t vb0123c3x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x0123c3 = vmlal_s8(vprod0x0123c3, vb0123c3x1, va0c3x1);
      vprod1x0123c3 = vmlal_s8(vprod1x0123c3, vb0123c3x1, va1c3x1);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c3);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c3);
      int16x8_t vprod0x4567c3 = vmull_s8(vb4567c3x0, va0c3x0);
      int16x8_t vprod1x4567c3 = vmull_s8(vb4567c3x0, va1c3x0);
      const int8x8_t vb4567c3x1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      vprod0x4567c3 = vmlal_s8(vprod0x4567c3, vb4567c3x1, va0c3x1);
      vprod1x4567c3 = vmlal_s8(vprod1x4567c3, vb4567c3x1, va1c3x1);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c3);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c3);

      k -= 16 * sizeof(int8_t);
    }

    if (k >= 8 * sizeof(int8_t)) {
      const int16x4x2_t va00 = vld2_dup_s16((const void*)a0);
      const int16x4x2_t va01 = vld2_dup_s16((const void*)(a0 + 4)); a0 += 8;
      const int16x4x2_t va10 = vld2_dup_s16((const void*)a1);
      const int16x4x2_t va11 = vld2_dup_s16((const void*)(a1 + 4)); a1 += 8;

      const int8x8_t vb0123c0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c2 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c2 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb0123c3 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c3 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));

      const int8x8_t va0c0 = vreinterpret_s8_s16(va00.val[0]);
      const int8x8_t va1c0 = vreinterpret_s8_s16(va10.val[0]);

      const int16x8_t vprod0x0123c0 = vmull_s8(vb0123c0, va0c0);
      const int16x8_t vprod1x0123c0 = vmull_s8(vb0123c0, va1c0);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c0);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c0);
      const int16x8_t vprod0x4567c0 = vmull_s8(vb4567c0, va0c0);
      const int16x8_t vprod1x4567c0 = vmull_s8(vb4567c0, va1c0);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c0);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c0);
      const int8x8_t va0c1 = vreinterpret_s8_s16(va00.val[1]);
      const int8x8_t va1c1 = vreinterpret_s8_s16(va10.val[1]);

      const int16x8_t vprod0x0123c1 = vmull_s8(vb0123c1, va0c1);
      const int16x8_t vprod1x0123c1 = vmull_s8(vb0123c1, va1c1);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c1);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c1);
      const int16x8_t vprod0x4567c1 = vmull_s8(vb4567c1, va0c1);
      const int16x8_t vprod1x4567c1 = vmull_s8(vb4567c1, va1c1);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c1);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c1);
      const int8x8_t va0c2 = vreinterpret_s8_s16(va01.val[0]);
      const int8x8_t va1c2 = vreinterpret_s8_s16(va11.val[0]);

      const int16x8_t vprod0x0123c2 = vmull_s8(vb0123c2, va0c2);
      const int16x8_t vprod1x0123c2 = vmull_s8(vb0123c2, va1c2);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c2);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c2);
      const int16x8_t vprod0x4567c2 = vmull_s8(vb4567c2, va0c2);
      const int16x8_t vprod1x4567c2 = vmull_s8(vb4567c2, va1c2);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c2);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c2);
      const int8x8_t va0c3 = vreinterpret_s8_s16(va01.val[1]);
      const int8x8_t va1c3 = vreinterpret_s8_s16(va11.val[1]);

      const int16x8_t vprod0x0123c3 = vmull_s8(vb0123c3, va0c3);
      const int16x8_t vprod1x0123c3 = vmull_s8(vb0123c3, va1c3);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c3);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c3);
      const int16x8_t vprod0x4567c3 = vmull_s8(vb4567c3, va0c3);
      const int16x8_t vprod1x4567c3 = vmull_s8(vb4567c3, va1c3);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c3);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c3);

      k -= 8 * sizeof(int8_t);
    }

    if XNN_UNLIKELY(k != 0) {
      const int8x8_t va0 = vld1_s8(a0); a0 = (const int8_t*) ((uintptr_t) a0 + k);
      const int8x8_t va1 = vld1_s8(a1); a1 = (const int8_t*) ((uintptr_t) a1 + k);

      const int8x8_t vb0123c0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
      const int8x8_t vb4567c0 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));

      const int8x8_t va0c0 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va0), 0));
      const int16x8_t vprod0x0123c0 = vmull_s8(vb0123c0, va0c0);
      vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c0);
      const int16x8_t vprod0x4567c0 = vmull_s8(vb4567c0, va0c0);
      vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c0);
      const int8x8_t va1c0 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va1), 0));
      const int16x8_t vprod1x0123c0 = vmull_s8(vb0123c0, va1c0);
      vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c0);
      const int16x8_t vprod1x4567c0 = vmull_s8(vb4567c0, va1c0);
      vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c0);

      if (k > 2 * sizeof(int8_t)) {
        const int8x8_t vb0123c1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
        const int8x8_t vb4567c1 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));

        const int8x8_t va0c1 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va0), 1));
        const int16x8_t vprod0x0123c1 = vmull_s8(vb0123c1, va0c1);
        vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c1);
        const int16x8_t vprod0x4567c1 = vmull_s8(vb4567c1, va0c1);
        vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c1);
        const int8x8_t va1c1 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va1), 1));
        const int16x8_t vprod1x0123c1 = vmull_s8(vb0123c1, va1c1);
        vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c1);
        const int16x8_t vprod1x4567c1 = vmull_s8(vb4567c1, va1c1);
        vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c1);

        if (k > 4 * sizeof(int8_t)) {
          const int8x8_t vb0123c2 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));
          const int8x8_t vb4567c2 = vld1_s8(w); w = (const void*) ((uintptr_t) w + 8 * sizeof(int8_t));

          const int8x8_t va0c2 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va0), 2));
          const int16x8_t vprod0x0123c2 = vmull_s8(vb0123c2, va0c2);
          vacc0x0123 = vpadalq_s16(vacc0x0123, vprod0x0123c2);
          const int16x8_t vprod0x4567c2 = vmull_s8(vb4567c2, va0c2);
          vacc0x4567 = vpadalq_s16(vacc0x4567, vprod0x4567c2);
          const int8x8_t va1c2 = vreinterpret_s8_s16(vdup_lane_s16(vreinterpret_s16_s8(va1), 2));
          const int16x8_t vprod1x0123c2 = vmull_s8(vb0123c2, va1c2);
          vacc1x0123 = vpadalq_s16(vacc1x0123, vprod1x0123c2);
          const int16x8_t vprod1x4567c2 = vmull_s8(vb4567c2, va1c2);
          vacc1x4567 = vpadalq_s16(vacc1x4567, vprod1x4567c2);
        }
      }
    }

    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);

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

    const float32x4_t vmagic_bias = vld1q_dup_f32(&params->fp32_neon.magic_bias);
    vacc0x0123 = vreinterpretq_s32_f32(vaddq_f32(vfpacc0x0123, vmagic_bias));
    vacc0x4567 = vreinterpretq_s32_f32(vaddq_f32(vfpacc0x4567, vmagic_bias));
    vacc1x0123 = vreinterpretq_s32_f32(vaddq_f32(vfpacc1x0123, vmagic_bias));
    vacc1x4567 = vreinterpretq_s32_f32(vaddq_f32(vfpacc1x4567, vmagic_bias));

    const int32x4_t vmagic_bias_less_output_zero_point = vld1q_dup_s32(&params->fp32_neon.magic_bias_less_output_zero_point);
    vacc0x0123 = vqsubq_s32(vacc0x0123, vmagic_bias_less_output_zero_point);
    vacc0x4567 = vqsubq_s32(vacc0x4567, vmagic_bias_less_output_zero_point);
    vacc1x0123 = vqsubq_s32(vacc1x0123, vmagic_bias_less_output_zero_point);
    vacc1x4567 = vqsubq_s32(vacc1x4567, vmagic_bias_less_output_zero_point);

#if XNN_ARCH_ARM64
    int16x8_t vacc0x01234567 = vqmovn_high_s32(vqmovn_s32(vacc0x0123), vacc0x4567);
    int16x8_t vacc1x01234567 = vqmovn_high_s32(vqmovn_s32(vacc1x0123), vacc1x4567);


    int8x16_t vout0x01234567_1x01234567 = vqmovn_high_s16(vqmovn_s16(vacc0x01234567), vacc1x01234567);
#else
    int16x8_t vacc0x01234567 = vcombine_s16(vqmovn_s32(vacc0x0123), vqmovn_s32(vacc0x4567));
    int16x8_t vacc1x01234567 = vcombine_s16(vqmovn_s32(vacc1x0123), vqmovn_s32(vacc1x4567));


    int8x16_t vout0x01234567_1x01234567 = vcombine_s8(vqmovn_s16(vacc0x01234567), vqmovn_s16(vacc1x01234567));
#endif

    const int8x16_t voutput_min = vld1q_dup_s8(&params->fp32_neon.output_min);
    vout0x01234567_1x01234567 = vmaxq_s8(vout0x01234567_1x01234567, voutput_min);

    const int8x16_t voutput_max = vld1q_dup_s8(&params->fp32_neon.output_max);
    vout0x01234567_1x01234567 = vminq_s8(vout0x01234567_1x01234567, voutput_max);

    if (nc >= 8) {
      vst1_s8(c0 + 0, vget_low_s8(vout0x01234567_1x01234567));
      vst1_s8(c1 + 0, vget_high_s8(vout0x01234567_1x01234567));

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

      a0 = (const int8_t*) ((uintptr_t) a0 - kc);
      a1 = (const int8_t*) ((uintptr_t) a1 - kc);

      nc -= 8;
    } else {
      // Final case where not all of the 8 columns fit in the destination.
      if (nc & 4) {
        vst1q_lane_u32((void*) c0, vreinterpretq_u32_s8(vout0x01234567_1x01234567), 0); c0 += 4;
        vst1q_lane_u32((void*) c1, vreinterpretq_u32_s8(vout0x01234567_1x01234567), 2); c1 += 4;
        vout0x01234567_1x01234567 = vextq_s8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 4);
      }
      if (nc & 2) {
        vst1q_lane_u16((void*) c0, vreinterpretq_u16_s8(vout0x01234567_1x01234567), 0); c0 += 2;
        vst1q_lane_u16((void*) c1, vreinterpretq_u16_s8(vout0x01234567_1x01234567), 4); c1 += 2;
        vout0x01234567_1x01234567 = vextq_s8(vout0x01234567_1x01234567, vout0x01234567_1x01234567, 2);
      }
      if (nc & 1) {
        vst1q_lane_s8(c0, vout0x01234567_1x01234567, 0);
        vst1q_lane_s8(c1, vout0x01234567_1x01234567, 8);
      }

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