// Auto-generated file. Do not edit!
//   Template: src/qs8-igemm/MRx4c8-wasmsimd-mul16.c.in
//   Generator: tools/xngen
//
// Copyright 2020 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 <wasm_simd128.h>

#include <xnnpack/gemm.h>
#include <xnnpack/math.h>


void xnn_qs8_igemm_minmax_fp32_ukernel_1x4c8__wasmsimd_mul16_ld64(
    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_conv_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN XNN_DISABLE_MSAN
{
  assert(mr != 0);
  assert(mr <= 1);
  assert(nc != 0);
  assert(kc != 0);
  assert(ks != 0);
  assert(ks % (1 * 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);
  int8_t* c0 = c;

  const v128_t vzero = wasm_f64x2_splat(0.0);
  do {
    v128_t vacc0x0 = wasm_f32x4_replace_lane(vzero, 0, ((const float*) w)[0]);
    v128_t vacc0x1 = wasm_f32x4_replace_lane(vzero, 0, ((const float*) w)[1]);
    v128_t vacc0x2 = wasm_f32x4_replace_lane(vzero, 0, ((const float*) w)[2]);
    v128_t vacc0x3 = wasm_f32x4_replace_lane(vzero, 0, ((const float*) w)[3]);
    w = (const void*) ((const int32_t*) w + 4);

    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);
      }
      a += 1;

      size_t k = 0;
      while (k < kc) {
        const v128_t vxa0 = wasm_i16x8_load8x8(a0);
        a0 += 8;

        const v128_t vxb0 = wasm_i16x8_load8x8(w);

        const v128_t vprod0x0 = wasm_i16x8_mul(vxa0, vxb0);
        vacc0x0 = wasm_i32x4_add(vacc0x0, wasm_i32x4_extend_low_i16x8(vprod0x0));
        vacc0x0 = wasm_i32x4_add(vacc0x0, wasm_i32x4_extend_high_i16x8(vprod0x0));
        const v128_t vxb1 = wasm_i16x8_load8x8((const int8_t*) w + 8);

        const v128_t vprod0x1 = wasm_i16x8_mul(vxa0, vxb1);
        vacc0x1 = wasm_i32x4_add(vacc0x1, wasm_i32x4_extend_low_i16x8(vprod0x1));
        vacc0x1 = wasm_i32x4_add(vacc0x1, wasm_i32x4_extend_high_i16x8(vprod0x1));
        const v128_t vxb2 = wasm_i16x8_load8x8((const int8_t*) w + 16);

        const v128_t vprod0x2 = wasm_i16x8_mul(vxa0, vxb2);
        vacc0x2 = wasm_i32x4_add(vacc0x2, wasm_i32x4_extend_low_i16x8(vprod0x2));
        vacc0x2 = wasm_i32x4_add(vacc0x2, wasm_i32x4_extend_high_i16x8(vprod0x2));
        const v128_t vxb3 = wasm_i16x8_load8x8((const int8_t*) w + 24);

        const v128_t vprod0x3 = wasm_i16x8_mul(vxa0, vxb3);
        vacc0x3 = wasm_i32x4_add(vacc0x3, wasm_i32x4_extend_low_i16x8(vprod0x3));
        vacc0x3 = wasm_i32x4_add(vacc0x3, wasm_i32x4_extend_high_i16x8(vprod0x3));

        w = (const void*) ((const int8_t*) w + 32);
        k += 8 * sizeof(int8_t);
      }
      p -= 1 * sizeof(void*);
    } while (p != 0);

    const v128_t vacc0x02 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x0, vacc0x2, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x0, vacc0x2, 2, 6, 3, 7));
    const v128_t vacc0x13 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x1, vacc0x3, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x1, vacc0x3, 2, 6, 3, 7));

    v128_t vacc0x0123 = wasm_i32x4_add(wasm_v32x4_shuffle(vacc0x02, vacc0x13, 0, 4, 1, 5), wasm_v32x4_shuffle(vacc0x02, vacc0x13, 2, 6, 3, 7));

    vacc0x0123 = wasm_f32x4_convert_i32x4(vacc0x0123);

    const v128_t vscale = wasm_v128_load(params->fp32_wasmsimd.scale);
    vacc0x0123 = wasm_f32x4_mul(vacc0x0123, vscale);

    const v128_t voutput_min_less_zero_point = wasm_v128_load(params->fp32_wasmsimd.output_min_less_zero_point);
    vacc0x0123 = wasm_f32x4_max(vacc0x0123, voutput_min_less_zero_point);

    const v128_t voutput_max_less_zero_point = wasm_v128_load(params->fp32_wasmsimd.output_max_less_zero_point);
    vacc0x0123 = wasm_f32x4_min(vacc0x0123, voutput_max_less_zero_point);

    const v128_t vmagic_bias = wasm_v128_load(params->fp32_wasmsimd.magic_bias);
    vacc0x0123 = wasm_f32x4_add(vacc0x0123, vmagic_bias);

    const v128_t vmagic_bias_less_output_zero_point = wasm_v128_load(params->fp32_wasmsimd.magic_bias_less_output_zero_point);
    vacc0x0123 = wasm_i32x4_sub(vacc0x0123, vmagic_bias_less_output_zero_point);

    v128_t vacc00x0123 = wasm_i16x8_narrow_i32x4(vacc0x0123, vacc0x0123);

    v128_t vout = wasm_i8x16_narrow_i16x8(vacc00x0123, vacc00x0123);

    if (nc >= 4) {
      *((float*) c0) = (float) wasm_f32x4_extract_lane(vout, 0);

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

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

      nc -= 4;
    } else {
      if (nc & 2) {
        *((uint16_t*) c0) = (uint16_t) wasm_i16x8_extract_lane(vout, 0);
        c0 += 2;
        vout = wasm_u32x4_shr(vout, 16);
      }
      if (nc & 1) {
        *c0 = (int8_t) wasm_i8x16_extract_lane(vout, 0);
      }

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