text: // Auto-generated file. Do not edit!
  //   Template: src/qs8-gemm/MRx4c2-sse.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 <emmintrin.h>
  
  #include <xnnpack/gemm.h>
  #include <xnnpack/math.h>
  
  
  
  void xnn_qs8_gemm_xw_minmax_gemmlowp_ukernel_1x4c2__sse2(
      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_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(kc % sizeof(int8_t) == 0);
    assert(a != NULL);
    assert(w != NULL);
    assert(c != NULL);
  
    kc = round_up_po2(kc, 2);
    const int8_t* a0 = a;
    int8_t* c0 = c;
  
    do {
      __m128i vacc0x0123 = _mm_loadu_si128((const __m128i*) w);
      w = (const void*) ((const int32_t*) w + 4);
  
      size_t k = kc;
      while (k >= 8 * sizeof(int8_t)) {
        const __m128i va0 = _mm_loadl_epi64((const __m128i*) a0);
        const __m128i vxa0 = _mm_srai_epi16(_mm_unpacklo_epi8(va0, va0), 8);
        a0 += 8;
  
        const __m128i vxb0 = _mm_load_si128((const __m128i*) w);
  
        vacc0x0123 = _mm_add_epi32(vacc0x0123,
          _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(0, 0, 0, 0)), vxb0));
        const __m128i vxb1 = _mm_load_si128((const __m128i*) ((const int16_t*) w + 8));
  
        vacc0x0123 = _mm_add_epi32(vacc0x0123,
          _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(1, 1, 1, 1)), vxb1));
        const __m128i vxb2 = _mm_load_si128((const __m128i*) ((const int16_t*) w + 16));
  
        vacc0x0123 = _mm_add_epi32(vacc0x0123,
          _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(2, 2, 2, 2)), vxb2));
        const __m128i vxb3 = _mm_load_si128((const __m128i*) ((const int16_t*) w + 24));
  
        vacc0x0123 = _mm_add_epi32(vacc0x0123,
          _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(3, 3, 3, 3)), vxb3));
  
        w = (const void*) ((const int16_t*) w + 32);
        k -= 8 * sizeof(int8_t);
      }
      if (k != 0) {
        const __m128i va0 = _mm_loadl_epi64((const __m128i*) a0);
        const __m128i vxa0 = _mm_srai_epi16(_mm_unpacklo_epi8(va0, va0), 8);
        a0 = (const int8_t*) ((uintptr_t) a0 + k);
  
        const __m128i vxb0 = _mm_load_si128((const __m128i*) w);
        w = (const void*) ((const int16_t*) w + 8);
  
        vacc0x0123 = _mm_add_epi32(vacc0x0123,
          _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(0, 0, 0, 0)), vxb0));
  
        if (k > 2 * sizeof(int8_t)) {
          const __m128i vxb1 = _mm_load_si128((const __m128i*) w);
          w = (const void*) ((const int16_t*) w + 8);
  
          vacc0x0123 = _mm_add_epi32(vacc0x0123,
            _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(1, 1, 1, 1)), vxb1));
  
          if (k > 4 * sizeof(int8_t)) {
            const __m128i vxb2 = _mm_load_si128((const __m128i*) w);
            w = (const void*) ((const int16_t*) w + 8);
  
            vacc0x0123 = _mm_add_epi32(vacc0x0123,
              _mm_madd_epi16(_mm_shuffle_epi32(vxa0, _MM_SHUFFLE(2, 2, 2, 2)), vxb2));
          }
        }
      }
  
      const __m128i vmultiplier = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.multiplier);
      const __m128i vrounding = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.rounding);
  
      const __m128i vnmask0x0123 = _mm_cmpgt_epi32(_mm_setzero_si128(), vacc0x0123);
  
      const __m128i vabsacc0x0123 = _mm_sub_epi32(_mm_xor_si128(vacc0x0123, vnmask0x0123), vnmask0x0123);
  
      const __m128i vabsacc0x1133 = _mm_shuffle_epi32(vabsacc0x0123, _MM_SHUFFLE(3, 3, 1, 1));
  
      const __m128i vabsprod0x02 = _mm_mul_epu32(vabsacc0x0123, vmultiplier);
  
      const __m128i vnmask0x02 = _mm_shuffle_epi32(vnmask0x0123, _MM_SHUFFLE(2, 2, 0, 0));
  
      const __m128i vprod0x02 = _mm_sub_epi64(_mm_xor_si128(vabsprod0x02, vnmask0x02), vnmask0x02);
  
      const __m128i vq31prod0x02 = _mm_srli_epi64(_mm_add_epi64(vprod0x02, vrounding), 31);
  
      const __m128i vabsprod0x13 = _mm_mul_epu32(vabsacc0x1133, vmultiplier);
  
      const __m128i vnmask0x13 = _mm_shuffle_epi32(vnmask0x0123, _MM_SHUFFLE(3, 3, 1, 1));
  
      const __m128i vprod0x13 = _mm_sub_epi64(_mm_xor_si128(vabsprod0x13, vnmask0x13), vnmask0x13);
  
      const __m128i vq31prod0x13 = _mm_srli_epi64(_mm_add_epi64(vprod0x13, vrounding), 31);
  
      const __m128i vq31prod0x0213 = _mm_castps_si128(_mm_shuffle_ps(
          _mm_castsi128_ps(vq31prod0x02), _mm_castsi128_ps(vq31prod0x13), _MM_SHUFFLE(2, 0, 2, 0)));
  
      const __m128i vq31prod0x0123 = _mm_shuffle_epi32(vq31prod0x0213, _MM_SHUFFLE(3, 1, 2, 0));
  
      const __m128i vremainder_mask = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.remainder_mask);
      const __m128i vrem0x0123 =
        _mm_add_epi32(_mm_and_si128(vq31prod0x0123, vremainder_mask), _mm_cmpgt_epi32(_mm_setzero_si128(), vq31prod0x0123));
  
      const __m128i vremainder_threshold = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.remainder_threshold);
      const __m128i vshift = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.shift);
      vacc0x0123 =
        _mm_sub_epi32(_mm_sra_epi32(vq31prod0x0123, vshift), _mm_cmpgt_epi32(vrem0x0123, vremainder_threshold));
  
      const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.output_zero_point);
      __m128i vacc00x0123 = _mm_adds_epi16(_mm_packs_epi32(vacc0x0123, vacc0x0123), voutput_zero_point);
  
      const __m128i voutput_min = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.output_min);
      const __m128i voutput_max = _mm_load_si128((const __m128i*) params->gemmlowp_sse2.output_max);
      vacc00x0123 = _mm_min_epi16(_mm_max_epi16(vacc00x0123, voutput_min), voutput_max);
  
      __m128i vout = _mm_packs_epi16(vacc00x0123, vacc00x0123);
  
  
      if (nc >= 4) {
        *((uint32_t*) c0) = (uint32_t) _mm_cvtsi128_si32(vout);
  
        c0 = (int8_t*) ((uintptr_t) c0 + cn_stride);
  
        a0 = (const int8_t*) ((uintptr_t) a0 - kc);
  
        nc -= 4;
      } else {
        if (nc & 2) {
          *((uint16_t*) c0) = (uint16_t) _mm_extract_epi16(vout, 0);
          c0 += 2;
          vout = _mm_srli_epi32(vout, 16);
        }
        if (nc & 1) {
          *c0 = (int8_t) _mm_cvtsi128_si32(vout);
        }
  
        nc = 0;
      }
    } while (nc != 0);
  }
  