// Auto-generated file. Do not edit!
//   Template: src/qs8-gemm/MRx4c2s4-wasmsimd-dot16x2.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 <wasm_simd128.h>

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



void xnn_qc8_gemm_minmax_fp32_ukernel_3x4c2s4__wasmsimd_dot16x2_ld128(
    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_qs8_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(mr != 0);
  assert(mr <= 3);
  assert(nc != 0);
  assert(kc != 0);
  assert(kc % sizeof(int8_t) == 0);
  assert(a != NULL);
  assert(w != NULL);
  assert(c != NULL);

  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;
  }
  const int8_t* a2 = (const int8_t*) ((uintptr_t) a1 + a_stride);
  int8_t* c2 = (int8_t*) ((uintptr_t) c1 + cm_stride);
  if XNN_UNPREDICTABLE(mr <= 2) {
    a2 = a1;
    c2 = c1;
  }

  kc = round_up_po2(kc, 8 * sizeof(int8_t));
  do {
    v128_t vacc0x0123 = wasm_v128_load(w);
    v128_t vacc1x0123 = vacc0x0123;
    v128_t vacc2x0123 = vacc0x0123;
    w = (const void*) ((const int32_t*) w + 4);

    size_t k = kc;
    do {
      v128_t vxa0 = wasm_i16x8_load8x8((const v128_t*) a0);
      a0 += 8;
      v128_t vxa1 = wasm_i16x8_load8x8((const v128_t*) a1);
      a1 += 8;
      v128_t vxa2 = wasm_i16x8_load8x8((const v128_t*) a2);
      a2 += 8;

      const v128_t vb01 = wasm_v128_load(w);
      const v128_t vxb0 = wasm_i16x8_extend_low_i8x16(vb01);
      const v128_t vxb1 = wasm_i16x8_extend_high_i8x16(vb01);

      vacc0x0123 = wasm_i32x4_add(vacc0x0123, wasm_i32x4_dot_i16x8(vxa0, vxb0));
      vxa0 = wasm_v32x4_shuffle(vxa0, vxa0, 1, 2, 3, 4);
      vacc1x0123 = wasm_i32x4_add(vacc1x0123, wasm_i32x4_dot_i16x8(vxa1, vxb0));
      vxa1 = wasm_v32x4_shuffle(vxa1, vxa1, 1, 2, 3, 4);
      vacc2x0123 = wasm_i32x4_add(vacc2x0123, wasm_i32x4_dot_i16x8(vxa2, vxb0));
      vxa2 = wasm_v32x4_shuffle(vxa2, vxa2, 1, 2, 3, 4);

      vacc0x0123 = wasm_i32x4_add(vacc0x0123, wasm_i32x4_dot_i16x8(vxa0, vxb1));
      vxa0 = wasm_v32x4_shuffle(vxa0, vxa0, 1, 2, 3, 4);
      vacc1x0123 = wasm_i32x4_add(vacc1x0123, wasm_i32x4_dot_i16x8(vxa1, vxb1));
      vxa1 = wasm_v32x4_shuffle(vxa1, vxa1, 1, 2, 3, 4);
      vacc2x0123 = wasm_i32x4_add(vacc2x0123, wasm_i32x4_dot_i16x8(vxa2, vxb1));
      vxa2 = wasm_v32x4_shuffle(vxa2, vxa2, 1, 2, 3, 4);
      const v128_t vb23 = wasm_v128_load((const int8_t*) w + 16);
      const v128_t vxb2 = wasm_i16x8_extend_low_i8x16(vb23);
      const v128_t vxb3 = wasm_i16x8_extend_high_i8x16(vb23);

      vacc0x0123 = wasm_i32x4_add(vacc0x0123, wasm_i32x4_dot_i16x8(vxa0, vxb2));
      vxa0 = wasm_v32x4_shuffle(vxa0, vxa0, 1, 2, 3, 4);
      vacc1x0123 = wasm_i32x4_add(vacc1x0123, wasm_i32x4_dot_i16x8(vxa1, vxb2));
      vxa1 = wasm_v32x4_shuffle(vxa1, vxa1, 1, 2, 3, 4);
      vacc2x0123 = wasm_i32x4_add(vacc2x0123, wasm_i32x4_dot_i16x8(vxa2, vxb2));
      vxa2 = wasm_v32x4_shuffle(vxa2, vxa2, 1, 2, 3, 4);

      vacc0x0123 = wasm_i32x4_add(vacc0x0123, wasm_i32x4_dot_i16x8(vxa0, vxb3));
      vacc1x0123 = wasm_i32x4_add(vacc1x0123, wasm_i32x4_dot_i16x8(vxa1, vxb3));
      vacc2x0123 = wasm_i32x4_add(vacc2x0123, wasm_i32x4_dot_i16x8(vxa2, vxb3));

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

    vacc0x0123 = wasm_f32x4_convert_i32x4(vacc0x0123);
    vacc1x0123 = wasm_f32x4_convert_i32x4(vacc1x0123);
    vacc2x0123 = wasm_f32x4_convert_i32x4(vacc2x0123);

    const v128_t vscale0123 = wasm_v128_load(w);
    w = (const float*) w + 4;
    vacc0x0123 = wasm_f32x4_mul(vacc0x0123, vscale0123);
    vacc1x0123 = wasm_f32x4_mul(vacc1x0123, vscale0123);
    vacc2x0123 = wasm_f32x4_mul(vacc2x0123, vscale0123);

    const v128_t vmagic_bias = wasm_v128_load64_splat(params->wasmsimd.magic_bias);
    vacc0x0123 = wasm_f32x4_add(vacc0x0123, vmagic_bias);
    vacc1x0123 = wasm_f32x4_add(vacc1x0123, vmagic_bias);
    vacc2x0123 = wasm_f32x4_add(vacc2x0123, vmagic_bias);

    const v128_t vmagic_min = wasm_v128_load64_splat(params->wasmsimd.magic_min);
    vacc0x0123 = wasm_i32x4_max(vacc0x0123, vmagic_min);
    vacc1x0123 = wasm_i32x4_max(vacc1x0123, vmagic_min);
    vacc2x0123 = wasm_i32x4_max(vacc2x0123, vmagic_min);

    const v128_t vmagic_bias_less_output_zero_point = wasm_v128_load64_splat(params->wasmsimd.magic_bias_less_output_zero_point);
    vacc0x0123 = wasm_i32x4_sub(vacc0x0123, vmagic_bias_less_output_zero_point);
    vacc1x0123 = wasm_i32x4_sub(vacc1x0123, vmagic_bias_less_output_zero_point);
    vacc2x0123 = wasm_i32x4_sub(vacc2x0123, vmagic_bias_less_output_zero_point);

    v128_t vacc01x0123 = wasm_i16x8_narrow_i32x4(vacc0x0123, vacc1x0123);
    v128_t vacc22x0123 = wasm_i16x8_narrow_i32x4(vacc2x0123, vacc2x0123);

    v128_t vout = wasm_i8x16_narrow_i16x8(vacc01x0123, vacc22x0123);

    const v128_t voutput_max = wasm_v128_load64_splat(params->wasmsimd.output_max);
    vout = wasm_i8x16_min(vout, voutput_max);

    if (nc >= 4) {
      *((float*) c0) = (float) wasm_f32x4_extract_lane(vout, 0);
      *((float*) c1) = (float) wasm_f32x4_extract_lane(vout, 1);
      *((float*) c2) = (float) wasm_f32x4_extract_lane(vout, 2);

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

      a0 = (const int8_t*) ((uintptr_t) a0 - kc);
      a1 = (const int8_t*) ((uintptr_t) a1 - kc);
      a2 = (const int8_t*) ((uintptr_t) a2 - kc);

      nc -= 4;
    } else {
      uint32_t vout0 = wasm_i32x4_extract_lane(vout, 0);
      uint32_t vout1 = wasm_i32x4_extract_lane(vout, 1);
      uint32_t vout2 = wasm_i32x4_extract_lane(vout, 2);
      if (nc & 2) {
        *((uint16_t*) c0) = (uint16_t) vout0;
        vout0 >>= 16;
        c0 += 2;
        *((uint16_t*) c1) = (uint16_t) vout1;
        vout1 >>= 16;
        c1 += 2;
        *((uint16_t*) c2) = (uint16_t) vout2;
        vout2 >>= 16;
        c2 += 2;
      }
      if (nc & 1) {
        *c0 = (int8_t) vout0;
        *c1 = (int8_t) vout1;
        *c2 = (int8_t) vout2;
      }

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