src/core/NEON/kernels/arm_conv/pooling/kernels/sve_s8_nhwc_avg_generic_depthfirst/generic.cpp

/*
 * Copyright (c) 2021 Arm Limited.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <cstdint>
#include <cstring>
#include <cmath>


#if defined(ARM_COMPUTE_ENABLE_SVE) && defined(ARM_COMPUTE_ENABLE_SVE2)

namespace arm_conv {
namespace pooling {

namespace {
  struct RescaleParams
  {
    int32_t multiplier, shift;
  };

  constexpr RescaleParams rescale_params[8] = {
    {0x40000000, -0},  // 1/2
    {0x55555556, -1},  // 1/3
    {0x40000000, -1},  // 1/4
    {0x66666666, -2},  // 1/5
    {0x55555556, -2},  // 1/6
    {0x49249249, -2},  // 1/7
    {0x40000000, -2},  // 1/8
    {0x71c71c72, -3},  // 1/9
  };
}

void sve_s8_nhwc_avg_generic_depthfirst_impl(
  const uint64_t window_cells,
  const uint64_t n_valid_cells,
  uint64_t n_channels,
  const int8_t *const *const inptrs,
  int8_t *outptr
)
{
  if (n_valid_cells == 1 && window_cells == 1)
  {
    // In this case, simply copy from the input to the output
    std::memcpy(outptr, *inptrs, n_channels);
    return;
  }

  // Compute (or look up) the rescale values
  int32_t shift_value = 0, rescale_value = 0;
  if (2 <= window_cells && window_cells <= 9)
  {
    auto &params = rescale_params[window_cells - 2];
    rescale_value = params.multiplier;
    shift_value = params.shift;
  }
  else
  {
    auto f_rescale_value = 1.0f / static_cast<float>(window_cells);

    shift_value = 0;
    while (f_rescale_value < 0.5f)
    {
      shift_value--;
      f_rescale_value *= 2.0f;
    }

    rescale_value = static_cast<int32_t>(round(f_rescale_value * static_cast<float>(1ll << 31)));
    if (static_cast<int64_t>(rescale_value) == (1ll << 31))
    {
      shift_value++;
      rescale_value >>= 1;
    }
  }

  __asm__ __volatile__(
    "ptrue p4.b\n"
    "mov x26, #0x0\n"
    "cntb x25\n"
    "cntb x24, ALL, MUL #2\n"
    "cntb x23, ALL, MUL #3\n"
    "whilelt p3.b, x26, %x[n_channels]\n"
    "whilelt p2.b, x25, %x[n_channels]\n"
    "whilelt p1.b, x24, %x[n_channels]\n"
    "whilelt p0.b, x23, %x[n_channels]\n"
    "b.none 7f\n"
    "1:"  // 4-vectors of channels
    "mov z15.s, #0x0\n"
    "mov x19, %x[inptrs]\n"
    "mov z14.s, #0x0\n"
    "lsr x22, %x[n_valid_cells], #0x1\n"
    "mov z13.s, #0x0\n"
    "mov z12.s, #0x0\n"
    "mov z11.s, #0x0\n"
    "mov z10.s, #0x0\n"
    "mov z9.s, #0x0\n"
    "mov z8.s, #0x0\n"
    "mov z7.s, #0x0\n"
    "mov z6.s, #0x0\n"
    "mov z5.s, #0x0\n"
    "mov z4.s, #0x0\n"
    "mov z3.s, #0x0\n"
    "mov z2.s, #0x0\n"
    "mov z1.s, #0x0\n"
    "mov z0.s, #0x0\n"
    "cbz x22, 4f\n"
    "ldp x21, x20, [x19, #0x0]\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    "add x19, x19, #0x10\n"
    "ld1b { z30.b }, p3/Z, [x20, x26]\n"
    "subs x22, x22, #0x1\n"
    "ld1b { z29.b }, p2/Z, [x21, x25]\n"
    "ld1b { z28.b }, p2/Z, [x20, x25]\n"
    "ld1b { z27.b }, p1/Z, [x21, x24]\n"
    "ld1b { z26.b }, p1/Z, [x20, x24]\n"
    "ld1b { z25.b }, p0/Z, [x21, x23]\n"
    "ld1b { z24.b }, p0/Z, [x20, x23]\n"
    "beq 3f\n"
    "2:"  // 4-vectors of channels: 2 inputs loop
    ".inst 0x455e03f7  // saddlb z23.h, z31.b, z30.b\n"
    "ldp x21, x20, [x19, #0x0]\n"
    "add x19, x19, #0x10\n"
    ".inst 0x455e07f6  // saddlt z22.h, z31.b, z30.b\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    ".inst 0x455c03b5  // saddlb z21.h, z29.b, z28.b\n"
    "subs x22, x22, #0x1\n"
    ".inst 0x455c07b4  // saddlt z20.h, z29.b, z28.b\n"
    "ld1b { z30.b }, p3/Z, [x20, x26]\n"
    ".inst 0x455a0373  // saddlb z19.h, z27.b, z26.b\n"
    "ld1b { z29.b }, p2/Z, [x21, x25]\n"
    ".inst 0x455a0772  // saddlt z18.h, z27.b, z26.b\n"
    "ld1b { z28.b }, p2/Z, [x20, x25]\n"
    ".inst 0x45580331  // saddlb z17.h, z25.b, z24.b\n"
    "ld1b { z27.b }, p1/Z, [x21, x24]\n"
    ".inst 0x45580730  // saddlt z16.h, z25.b, z24.b\n"
    "ld1b { z26.b }, p1/Z, [x20, x24]\n"
    ".inst 0x459741ef  // saddwb z15.s, z15.s, z23.h\n"
    "ld1b { z25.b }, p0/Z, [x21, x23]\n"
    ".inst 0x459745ce  // saddwt z14.s, z14.s, z23.h\n"
    "ld1b { z24.b }, p0/Z, [x20, x23]\n"
    ".inst 0x459641ad  // saddwb z13.s, z13.s, z22.h\n"
    ".inst 0x4596458c  // saddwt z12.s, z12.s, z22.h\n"
    ".inst 0x4595416b  // saddwb z11.s, z11.s, z21.h\n"
    ".inst 0x4595454a  // saddwt z10.s, z10.s, z21.h\n"
    ".inst 0x45944129  // saddwb z9.s, z9.s, z20.h\n"
    ".inst 0x45944508  // saddwt z8.s, z8.s, z20.h\n"
    ".inst 0x459340e7  // saddwb z7.s, z7.s, z19.h\n"
    ".inst 0x459344c6  // saddwt z6.s, z6.s, z19.h\n"
    ".inst 0x459240a5  // saddwb z5.s, z5.s, z18.h\n"
    ".inst 0x45924484  // saddwt z4.s, z4.s, z18.h\n"
    ".inst 0x45914063  // saddwb z3.s, z3.s, z17.h\n"
    ".inst 0x45914442  // saddwt z2.s, z2.s, z17.h\n"
    ".inst 0x45904021  // saddwb z1.s, z1.s, z16.h\n"
    ".inst 0x45904400  // saddwt z0.s, z0.s, z16.h\n"
    "bgt 2b\n"
    "3:"  // 4-vectors of channels: 2 inputs tail
    ".inst 0x455e03f7  // saddlb z23.h, z31.b, z30.b\n"
    ".inst 0x455e07f6  // saddlt z22.h, z31.b, z30.b\n"
    ".inst 0x455c03b5  // saddlb z21.h, z29.b, z28.b\n"
    ".inst 0x455c07b4  // saddlt z20.h, z29.b, z28.b\n"
    ".inst 0x455a0373  // saddlb z19.h, z27.b, z26.b\n"
    ".inst 0x455a0772  // saddlt z18.h, z27.b, z26.b\n"
    ".inst 0x45580331  // saddlb z17.h, z25.b, z24.b\n"
    ".inst 0x45580730  // saddlt z16.h, z25.b, z24.b\n"
    ".inst 0x459741ef  // saddwb z15.s, z15.s, z23.h\n"
    ".inst 0x459745ce  // saddwt z14.s, z14.s, z23.h\n"
    ".inst 0x459641ad  // saddwb z13.s, z13.s, z22.h\n"
    ".inst 0x4596458c  // saddwt z12.s, z12.s, z22.h\n"
    ".inst 0x4595416b  // saddwb z11.s, z11.s, z21.h\n"
    ".inst 0x4595454a  // saddwt z10.s, z10.s, z21.h\n"
    ".inst 0x45944129  // saddwb z9.s, z9.s, z20.h\n"
    ".inst 0x45944508  // saddwt z8.s, z8.s, z20.h\n"
    ".inst 0x459340e7  // saddwb z7.s, z7.s, z19.h\n"
    ".inst 0x459344c6  // saddwt z6.s, z6.s, z19.h\n"
    ".inst 0x459240a5  // saddwb z5.s, z5.s, z18.h\n"
    ".inst 0x45924484  // saddwt z4.s, z4.s, z18.h\n"
    ".inst 0x45914063  // saddwb z3.s, z3.s, z17.h\n"
    ".inst 0x45914442  // saddwt z2.s, z2.s, z17.h\n"
    ".inst 0x45904021  // saddwb z1.s, z1.s, z16.h\n"
    ".inst 0x45904400  // saddwt z0.s, z0.s, z16.h\n"
    "4:"  // 4-vectors of channels: After loop
    "ands x20, %x[n_valid_cells], #0x1\n"
    "beq 6f\n"
    "5:"  // 4-vectors of channels: Single input loop
    "ldr x21, [x19], #0x8\n"
    "subs x20, x20, #0x1\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    ".inst 0x4508a3f1  // sshllb z17.h, z31.b, #0x0\n"
    "ld1b { z29.b }, p2/Z, [x21, x25]\n"
    ".inst 0x4508a7f0  // sshllt z16.h, z31.b, #0x0\n"
    "ld1b { z27.b }, p1/Z, [x21, x24]\n"
    ".inst 0x459141ef  // saddwb z15.s, z15.s, z17.h\n"
    "ld1b { z25.b }, p0/Z, [x21, x23]\n"
    ".inst 0x459145ce  // saddwt z14.s, z14.s, z17.h\n"
    ".inst 0x459041ad  // saddwb z13.s, z13.s, z16.h\n"
    ".inst 0x4590458c  // saddwt z12.s, z12.s, z16.h\n"
    ".inst 0x4508a3b0  // sshllb z16.h, z29.b, #0x0\n"
    ".inst 0x4590416b  // saddwb z11.s, z11.s, z16.h\n"
    ".inst 0x4590454a  // saddwt z10.s, z10.s, z16.h\n"
    ".inst 0x4508a7b0  // sshllt z16.h, z29.b, #0x0\n"
    ".inst 0x45904129  // saddwb z9.s, z9.s, z16.h\n"
    ".inst 0x45904508  // saddwt z8.s, z8.s, z16.h\n"
    ".inst 0x4508a370  // sshllb z16.h, z27.b, #0x0\n"
    ".inst 0x459040e7  // saddwb z7.s, z7.s, z16.h\n"
    ".inst 0x459044c6  // saddwt z6.s, z6.s, z16.h\n"
    ".inst 0x4508a770  // sshllt z16.h, z27.b, #0x0\n"
    ".inst 0x459040a5  // saddwb z5.s, z5.s, z16.h\n"
    ".inst 0x45904484  // saddwt z4.s, z4.s, z16.h\n"
    ".inst 0x4508a330  // sshllb z16.h, z25.b, #0x0\n"
    ".inst 0x45904063  // saddwb z3.s, z3.s, z16.h\n"
    ".inst 0x45904442  // saddwt z2.s, z2.s, z16.h\n"
    ".inst 0x4508a730  // sshllt z16.h, z25.b, #0x0\n"
    ".inst 0x45904021  // saddwb z1.s, z1.s, z16.h\n"
    ".inst 0x45904400  // saddwt z0.s, z0.s, z16.h\n"
    "bgt 5b\n"
    "6:"  // 4-vectors of channels: Single input loop: End
    "mov z20.s, #0x7f\n"
    "ld1rw { z17.s }, p4/Z, [%x[rescale_ptr]]\n"
    "ld1rw { z16.s }, p4/Z, [%x[shift_ptr]]\n"
    "not z19.s, p4/M, z20.s\n"
    ".inst 0x04b175ef  // sqdmulh z15.s, z15.s, z17.s\n"
    ".inst 0x04b175ce  // sqdmulh z14.s, z14.s, z17.s\n"
    ".inst 0x04b175ad  // sqdmulh z13.s, z13.s, z17.s\n"
    ".inst 0x04b1758c  // sqdmulh z12.s, z12.s, z17.s\n"
    ".inst 0x04b1756b  // sqdmulh z11.s, z11.s, z17.s\n"
    ".inst 0x04b1754a  // sqdmulh z10.s, z10.s, z17.s\n"
    ".inst 0x04b17529  // sqdmulh z9.s, z9.s, z17.s\n"
    ".inst 0x04b17508  // sqdmulh z8.s, z8.s, z17.s\n"
    ".inst 0x04b174e7  // sqdmulh z7.s, z7.s, z17.s\n"
    ".inst 0x04b174c6  // sqdmulh z6.s, z6.s, z17.s\n"
    ".inst 0x04b174a5  // sqdmulh z5.s, z5.s, z17.s\n"
    ".inst 0x04b17484  // sqdmulh z4.s, z4.s, z17.s\n"
    ".inst 0x04b17463  // sqdmulh z3.s, z3.s, z17.s\n"
    ".inst 0x04b17442  // sqdmulh z2.s, z2.s, z17.s\n"
    ".inst 0x04b17421  // sqdmulh z1.s, z1.s, z17.s\n"
    ".inst 0x04b17400  // sqdmulh z0.s, z0.s, z17.s\n"
    ".inst 0x4482920f  // srshl z15.s, p4/M, z15.s, z16.s\n"
    ".inst 0x4482920e  // srshl z14.s, p4/M, z14.s, z16.s\n"
    ".inst 0x4482920d  // srshl z13.s, p4/M, z13.s, z16.s\n"
    ".inst 0x4482920c  // srshl z12.s, p4/M, z12.s, z16.s\n"
    ".inst 0x4482920b  // srshl z11.s, p4/M, z11.s, z16.s\n"
    ".inst 0x4482920a  // srshl z10.s, p4/M, z10.s, z16.s\n"
    ".inst 0x44829209  // srshl z9.s, p4/M, z9.s, z16.s\n"
    ".inst 0x44829208  // srshl z8.s, p4/M, z8.s, z16.s\n"
    ".inst 0x44829207  // srshl z7.s, p4/M, z7.s, z16.s\n"
    ".inst 0x44829206  // srshl z6.s, p4/M, z6.s, z16.s\n"
    ".inst 0x44829205  // srshl z5.s, p4/M, z5.s, z16.s\n"
    ".inst 0x44829204  // srshl z4.s, p4/M, z4.s, z16.s\n"
    ".inst 0x44829203  // srshl z3.s, p4/M, z3.s, z16.s\n"
    ".inst 0x44829202  // srshl z2.s, p4/M, z2.s, z16.s\n"
    ".inst 0x44829201  // srshl z1.s, p4/M, z1.s, z16.s\n"
    ".inst 0x44829200  // srshl z0.s, p4/M, z0.s, z16.s\n"
    "smax z15.s, p4/M, z15.s, z19.s\n"
    "smax z14.s, p4/M, z14.s, z19.s\n"
    "smax z13.s, p4/M, z13.s, z19.s\n"
    "smax z12.s, p4/M, z12.s, z19.s\n"
    "smin z15.s, p4/M, z15.s, z20.s\n"
    "smin z14.s, p4/M, z14.s, z20.s\n"
    "smin z13.s, p4/M, z13.s, z20.s\n"
    "smin z12.s, p4/M, z12.s, z20.s\n"
    "smax z11.s, p4/M, z11.s, z19.s\n"
    "trn1 z17.h, z15.h, z14.h\n"
    "smax z10.s, p4/M, z10.s, z19.s\n"
    "trn1 z16.h, z13.h, z12.h\n"
    "smin z11.s, p4/M, z11.s, z20.s\n"
    "trn1 z16.b, z17.b, z16.b\n"
    "st1b { z16.b }, p3, [%x[outptr], x26]\n"
    "smin z10.s, p4/M, z10.s, z20.s\n"
    "incb x26, ALL, MUL #4\n"
    "smax z9.s, p4/M, z9.s, z19.s\n"
    "smax z8.s, p4/M, z8.s, z19.s\n"
    "smax z7.s, p4/M, z7.s, z19.s\n"
    "smax z6.s, p4/M, z6.s, z19.s\n"
    "trn1 z18.h, z11.h, z10.h\n"
    "smin z9.s, p4/M, z9.s, z20.s\n"
    "smin z8.s, p4/M, z8.s, z20.s\n"
    "smin z7.s, p4/M, z7.s, z20.s\n"
    "smin z6.s, p4/M, z6.s, z20.s\n"
    "smax z5.s, p4/M, z5.s, z19.s\n"
    "trn1 z16.h, z9.h, z8.h\n"
    "smax z4.s, p4/M, z4.s, z19.s\n"
    "trn1 z17.h, z7.h, z6.h\n"
    "trn1 z16.b, z18.b, z16.b\n"
    "st1b { z16.b }, p2, [%x[outptr], x25]\n"
    "smin z5.s, p4/M, z5.s, z20.s\n"
    "incb x25, ALL, MUL #4\n"
    "smin z4.s, p4/M, z4.s, z20.s\n"
    "smax z3.s, p4/M, z3.s, z19.s\n"
    "smax z2.s, p4/M, z2.s, z19.s\n"
    "smax z1.s, p4/M, z1.s, z19.s\n"
    "smax z0.s, p4/M, z0.s, z19.s\n"
    "trn1 z16.h, z5.h, z4.h\n"
    "smin z3.s, p4/M, z3.s, z20.s\n"
    "trn1 z16.b, z17.b, z16.b\n"
    "st1b { z16.b }, p1, [%x[outptr], x24]\n"
    "smin z2.s, p4/M, z2.s, z20.s\n"
    "incb x24, ALL, MUL #4\n"
    "smin z1.s, p4/M, z1.s, z20.s\n"
    "smin z0.s, p4/M, z0.s, z20.s\n"
    "trn1 z17.h, z3.h, z2.h\n"
    "trn1 z16.h, z1.h, z0.h\n"
    "trn1 z16.b, z17.b, z16.b\n"
    "st1b { z16.b }, p0, [%x[outptr], x23]\n"
    "incb x23, ALL, MUL #4\n"
    "whilelt p0.b, x23, %x[n_channels]\n"
    "b.any 1b\n"
    "7:"  // Single vector of channels
    "whilelt p3.b, x26, %x[n_channels]\n"
    "b.none 14f\n"
    "8:"  // Single vector of channels: Loop
    "mov z15.s, #0x0\n"
    "mov x19, %x[inptrs]\n"
    "mov z14.s, #0x0\n"
    "lsr x22, %x[n_valid_cells], #0x1\n"
    "mov z13.s, #0x0\n"
    "mov z12.s, #0x0\n"
    "cbz x22, 11f\n"
    "ldp x21, x20, [x19, #0x0]\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    "add x19, x19, #0x10\n"
    "ld1b { z30.b }, p3/Z, [x20, x26]\n"
    "subs x22, x22, #0x1\n"
    "beq 10f\n"
    "9:"  // Single vector of channels: Loop: 2 inputs loop
    ".inst 0x455e03f7  // saddlb z23.h, z31.b, z30.b\n"
    "ldp x21, x20, [x19, #0x0]\n"
    "add x19, x19, #0x10\n"
    ".inst 0x455e07f6  // saddlt z22.h, z31.b, z30.b\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    ".inst 0x459741ef  // saddwb z15.s, z15.s, z23.h\n"
    "subs x22, x22, #0x1\n"
    ".inst 0x459745ce  // saddwt z14.s, z14.s, z23.h\n"
    "ld1b { z30.b }, p3/Z, [x20, x26]\n"
    ".inst 0x459641ad  // saddwb z13.s, z13.s, z22.h\n"
    ".inst 0x4596458c  // saddwt z12.s, z12.s, z22.h\n"
    "bgt 9b\n"
    "10:"  // Single vector of channels: Loop: 2 inputs tail
    ".inst 0x455e03f7  // saddlb z23.h, z31.b, z30.b\n"
    ".inst 0x455e07f6  // saddlt z22.h, z31.b, z30.b\n"
    ".inst 0x459741ef  // saddwb z15.s, z15.s, z23.h\n"
    ".inst 0x459745ce  // saddwt z14.s, z14.s, z23.h\n"
    ".inst 0x459641ad  // saddwb z13.s, z13.s, z22.h\n"
    ".inst 0x4596458c  // saddwt z12.s, z12.s, z22.h\n"
    "11:"  // Single vector of channels: Loop: After loop
    "ands x20, %x[n_valid_cells], #0x1\n"
    "beq 13f\n"
    "12:"  // Single vector of channels: Loop: Single input loop
    "ldr x21, [x19], #0x8\n"
    "subs x20, x20, #0x1\n"
    "ld1b { z31.b }, p3/Z, [x21, x26]\n"
    ".inst 0x4508a3f1  // sshllb z17.h, z31.b, #0x0\n"
    ".inst 0x4508a7f0  // sshllt z16.h, z31.b, #0x0\n"
    ".inst 0x459141ef  // saddwb z15.s, z15.s, z17.h\n"
    ".inst 0x459145ce  // saddwt z14.s, z14.s, z17.h\n"
    ".inst 0x459041ad  // saddwb z13.s, z13.s, z16.h\n"
    ".inst 0x4590458c  // saddwt z12.s, z12.s, z16.h\n"
    "bgt 12b\n"
    "13:"  // Single vector of channels: Loop: Single input loop: End
    "mov z20.s, #0x7f\n"
    "ld1rw { z17.s }, p4/Z, [%x[rescale_ptr]]\n"
    "ld1rw { z16.s }, p4/Z, [%x[shift_ptr]]\n"
    "not z19.s, p4/M, z20.s\n"
    ".inst 0x04b175ef  // sqdmulh z15.s, z15.s, z17.s\n"
    ".inst 0x04b175ce  // sqdmulh z14.s, z14.s, z17.s\n"
    ".inst 0x04b175ad  // sqdmulh z13.s, z13.s, z17.s\n"
    ".inst 0x04b1758c  // sqdmulh z12.s, z12.s, z17.s\n"
    ".inst 0x4482920f  // srshl z15.s, p4/M, z15.s, z16.s\n"
    ".inst 0x4482920e  // srshl z14.s, p4/M, z14.s, z16.s\n"
    ".inst 0x4482920d  // srshl z13.s, p4/M, z13.s, z16.s\n"
    ".inst 0x4482920c  // srshl z12.s, p4/M, z12.s, z16.s\n"
    "smax z15.s, p4/M, z15.s, z19.s\n"
    "smax z14.s, p4/M, z14.s, z19.s\n"
    "smax z13.s, p4/M, z13.s, z19.s\n"
    "smax z12.s, p4/M, z12.s, z19.s\n"
    "smin z15.s, p4/M, z15.s, z20.s\n"
    "smin z14.s, p4/M, z14.s, z20.s\n"
    "smin z13.s, p4/M, z13.s, z20.s\n"
    "smin z12.s, p4/M, z12.s, z20.s\n"
    "trn1 z17.h, z15.h, z14.h\n"
    "trn1 z16.h, z13.h, z12.h\n"
    "trn1 z16.b, z17.b, z16.b\n"
    "st1b { z16.b }, p3, [%x[outptr], x26]\n"
    "incb x26\n"
    "whilelt p3.b, x26, %x[n_channels]\n"
    "b.any 8b\n"
    "14:"  // End

    :
    : [inptrs] "r" (inptrs), [n_channels] "r" (n_channels), [n_valid_cells] "r" (n_valid_cells), [outptr] "r" (outptr), [rescale_ptr] "r" (&rescale_value), [shift_ptr] "r" (&shift_value)
    : "cc", "memory", "p0", "p1", "p2", "p3", "p4", "x19", "x20", "x21", "x22", "x23", "x24", "x25", "x26", "z0", "z1", "z2", "z3", "z4", "z5", "z6", "z7", "z8", "z9", "z10", "z11", "z12", "z13", "z14", "z15", "z16", "z17", "z18", "z19", "z20", "z21", "z22", "z23", "z24", "z25", "z26", "z27", "z28", "z29", "z30", "z31"
  );
}

}  // namespace pooling
}  // namespace arm_conv

#endif  // defined(ARM_COMPUTE_ENABLE_SVE) && defined(ARM_COMPUTE_ENABLE_SVE2)