src/qs8-gavgpool/unipass-sse.c.in

// 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.

$SSE_HEADER = {2: "emmintrin.h", 4: "smmintrin.h"}[SSE]
$assert CHANNEL_TILE % 8 == 0
$assert CHANNEL_TILE >= 8
$assert ROW_TILE >= 2
$assert ACCUMULATORS >= 1
$assert ROW_TILE >= ACCUMULATORS * 2
$assert REQUANTIZATION == "FP32"
$ABC = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
#include <assert.h>

#include <${SSE_HEADER}>

#include <xnnpack/gavgpool.h>


$PARAMS_STRUCT = "fp32_sse4" if SSE >= 4 else "fp32_sse2"
$ISA = {2: "sse2", 4: "sse41"}[SSE]
void xnn_qs8_gavgpool_minmax_fp32_ukernel_${ROW_TILE}x__${ISA}_c${CHANNEL_TILE}${"" if ACCUMULATORS == 1 else "_acc%d" % ACCUMULATORS}(
    size_t rows,
    size_t channels,
    const int8_t* input,
    size_t input_stride,
    const int8_t* zero,
    int8_t* output,
    const union xnn_qs8_avgpool_minmax_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
{
  assert(rows != 0);
  assert(rows <= ${ROW_TILE});
  assert(channels != 0);

  const int8_t* i0 = input;
  $for M in range(1, ROW_TILE):
    const int8_t* i${M} = (const int8_t*) ((uintptr_t) i${M-1} + input_stride);
    $if M % 2 == 1:
      if XNN_UNPREDICTABLE(rows < ${M+1}) {
        i${M} = zero;
      }
    $else:
      if XNN_UNPREDICTABLE(rows <= ${M}) {
        i${M} = zero;
      }

  const __m128i vinit_bias = _mm_load_si128((const __m128i*) params->${PARAMS_STRUCT}.init_bias);
  const __m128 vscale = _mm_load_ps(params->${PARAMS_STRUCT}.scale);
  const __m128 voutput_max_less_zero_point = _mm_load_ps(params->${PARAMS_STRUCT}.output_max_less_zero_point);
  const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->${PARAMS_STRUCT}.output_zero_point);
  const __m128i voutput_min = _mm_load_si128((const __m128i*) params->${PARAMS_STRUCT}.output_min);
  for (; channels >= ${CHANNEL_TILE}; channels -= ${CHANNEL_TILE}) {
    $for M in range(ROW_TILE):
      $if SSE >= 4:
        const __m128i vxi${M}x${ABC[0:8]} = _mm_cvtepi8_epi16(_mm_loadl_epi64((const __m128i*) i${M}));
        $for C in range(8, CHANNEL_TILE, 8):
          const __m128i vxi${M}x${ABC[C:C+8]} = _mm_cvtepi8_epi16(_mm_loadl_epi64((const __m128i*) (i${M} + ${C})));
      $else:
        const __m128i vi${M}x${ABC[0:8]} = _mm_loadl_epi64((const __m128i*) i${M});
        $for C in range(8, CHANNEL_TILE, 8):
          const __m128i vi${M}x${ABC[C:C+8]} = _mm_loadl_epi64((const __m128i*) (i${M} + ${C}));
      i${M} += ${CHANNEL_TILE};

    $if SSE < 4:
      $for M in range(ROW_TILE):
        $for C in range(0, CHANNEL_TILE, 8):
          const __m128i vxi${M}x${ABC[C:C+8]} = _mm_srai_epi16(_mm_unpacklo_epi8(vi${M}x${ABC[C:C+8]}, vi${M}x${ABC[C:C+8]}), 8);

    $for A in range(ACCUMULATORS):
      $for C in range(0, CHANNEL_TILE, 8):
        __m128i vacc${A}x${ABC[C:C+8]} = _mm_add_epi16(vxi${A*2}x${ABC[C:C+8]}, vxi${A*2+1}x${ABC[C:C+8]});

    $for M in range(ACCUMULATORS * 2, ROW_TILE):
      $for C in range(0, CHANNEL_TILE, 8):
        vacc${M % ACCUMULATORS}x${ABC[C:C+8]} = _mm_add_epi16(vacc${M % ACCUMULATORS}x${ABC[C:C+8]}, vxi${M}x${ABC[C:C+8]});

    $if ACCUMULATORS > 1:
      // Add up all accumulators to vacc0x${ABC[0:CHANNEL_TILE]}
      $ACC_SLICE = 1
      $while ACC_SLICE < ACCUMULATORS:
        $for A in range(0, ACCUMULATORS, ACC_SLICE * 2):
          $if A + ACC_SLICE < ACCUMULATORS:
            $for C in range(0, CHANNEL_TILE, 8):
              vacc${A}x${ABC[C:C+8]} = _mm_add_epi16(vacc${A}x${ABC[C:C+8]}, vacc${A + ACC_SLICE}x${ABC[C:C+8]});
        $ACC_SLICE *= 2

    $for C in range(0, CHANNEL_TILE, 8):
      $if SSE == 4:
        __m128i vacc${ABC[C:C+4]} = _mm_add_epi32(vinit_bias, _mm_cvtepi16_epi32(vacc0x${ABC[C:C+8]}));
        __m128i vacc${ABC[C+4:C+8]} = _mm_add_epi32(vinit_bias, _mm_srai_epi32(_mm_unpackhi_epi16(vacc0x${ABC[C:C+8]}, vacc0x${ABC[C:C+8]}), 16));
      $else:
        const __m128i vsgnacc0x${ABC[C:C+8]} = _mm_cmpgt_epi16(_mm_setzero_si128(), vacc0x${ABC[C:C+8]});
        __m128i vacc${ABC[C:C+4]} = _mm_add_epi32(vinit_bias, _mm_unpacklo_epi16(vacc0x${ABC[C:C+8]}, vsgnacc0x${ABC[C:C+8]}));
        __m128i vacc${ABC[C+4:C+8]} = _mm_add_epi32(vinit_bias, _mm_unpackhi_epi16(vacc0x${ABC[C:C+8]}, vsgnacc0x${ABC[C:C+8]}));

    $for C in range(0, CHANNEL_TILE, 4):
      __m128 vfpacc${ABC[C:C+4]} = _mm_cvtepi32_ps(vacc${ABC[C:C+4]});

    $for C in range(0, CHANNEL_TILE, 4):
      vfpacc${ABC[C:C+4]} = _mm_mul_ps(vfpacc${ABC[C:C+4]}, vscale);

    $for C in range(0, CHANNEL_TILE, 4):
      vfpacc${ABC[C:C+4]} = _mm_min_ps(vfpacc${ABC[C:C+4]}, voutput_max_less_zero_point);

    $for C in range(0, CHANNEL_TILE, 4):
      vacc${ABC[C:C+4]} = _mm_cvtps_epi32(vfpacc${ABC[C:C+4]});

    $for C in range(0, CHANNEL_TILE, 8):
      __m128i vout${ABC[C:C+8]} = _mm_adds_epi16(_mm_packs_epi32(vacc${ABC[C:C+4]}, vacc${ABC[C+4:C+8]}), voutput_zero_point);

    $if SSE < 4:
      $for C in range(0, CHANNEL_TILE, 8):
        vout${ABC[C:C+8]} = _mm_max_epi16(vout${ABC[C:C+8]}, voutput_min);

    $for C in range(0, CHANNEL_TILE, 16):
      $if C + 8 < CHANNEL_TILE:
        __m128i vout${ABC[C:C+16]} = _mm_packs_epi16(vout${ABC[C:C+8]}, vout${ABC[C+8:C+16]});
      $else:
        __m128i vout${ABC[C:C+8]}${ABC[C:C+8]} = _mm_packs_epi16(vout${ABC[C:C+8]}, vout${ABC[C:C+8]});

    $if SSE == 4:
      $for C in range(0, CHANNEL_TILE, 16):
        $if C + 8 < CHANNEL_TILE:
          vout${ABC[C:C+16]} = _mm_max_epi8(vout${ABC[C:C+16]}, voutput_min);
        $else:
          vout${ABC[C:C+8]}${ABC[C:C+8]} = _mm_max_epi8(vout${ABC[C:C+8]}${ABC[C:C+8]}, voutput_min);

    $if CHANNEL_TILE > 8:
      _mm_storeu_si128((__m128i*) output, vout${ABC[0:16]});
    $else:
      _mm_storel_epi64((__m128i*) output, vout${ABC[0:8]}${ABC[0:8]});
    $for C in range(16, CHANNEL_TILE, 16):
      $if C + 8 < CHANNEL_TILE:
        _mm_storeu_si128((__m128i*) (output + ${C}), vout${ABC[C:C+16]});
      $else:
        _mm_storel_epi64((__m128i*) (output + ${C}), vout${ABC[C:C+8]}${ABC[C:C+8]});
    output += ${CHANNEL_TILE};
  }
  if XNN_UNLIKELY(channels != 0) {
    ${"do " if CHANNEL_TILE > 8 else ""}{
      $for M in range(ROW_TILE):
        $if SSE == 4:
          const __m128i vxi${M}x${ABC[0:8]} = _mm_cvtepi8_epi16(_mm_loadl_epi64((const __m128i*) i${M}));
        $else:
          const __m128i vi${M}x${ABC[0:8]} = _mm_loadl_epi64((const __m128i*) i${M});
        i${M} += 8;

      $if SSE < 4:
        $for M in range(ROW_TILE):
          const __m128i vxi${M}x${ABC[0:8]} = _mm_srai_epi16(_mm_unpacklo_epi8(vi${M}x${ABC[0:8]}, vi${M}x${ABC[0:8]}), 8);

      $for A in range(ACCUMULATORS):
        __m128i vacc${A}x${ABC[0:8]} = _mm_add_epi16(vxi${A*2}x${ABC[0:8]}, vxi${A*2+1}x${ABC[0:8]});

      $for M in range(ACCUMULATORS * 2, ROW_TILE):
        vacc${M % ACCUMULATORS}x${ABC[0:8]} = _mm_add_epi16(vacc${M % ACCUMULATORS}x${ABC[0:8]}, vxi${M}x${ABC[0:8]});

      $if ACCUMULATORS > 1:
        // Add up all accumulators to vacc0x${ABC[0:8]}
        $ACC_SLICE = 1
        $while ACC_SLICE < ACCUMULATORS:
          $for A in range(0, ACCUMULATORS, ACC_SLICE * 2):
            $if A + ACC_SLICE < ACCUMULATORS:
              vacc${A}x${ABC[0:8]} = _mm_add_epi16(vacc${A}x${ABC[0:8]}, vacc${A + ACC_SLICE}x${ABC[0:8]});
          $ACC_SLICE *= 2

      $if SSE == 4:
        __m128i vacc${ABC[0:4]} = _mm_add_epi32(_mm_cvtepi16_epi32(vacc0x${ABC[0:8]}), vinit_bias);
        __m128i vacc${ABC[4:8]} = _mm_add_epi32(_mm_srai_epi32(_mm_unpackhi_epi16(vacc0x${ABC[0:8]}, vacc0x${ABC[0:8]}), 16), vinit_bias);
      $else:
        const __m128i vsgnacc0x${ABC[0:8]} = _mm_cmpgt_epi16(_mm_setzero_si128(), vacc0x${ABC[0:8]});
        __m128i vacc${ABC[0:4]} = _mm_add_epi32(_mm_unpacklo_epi16(vacc0x${ABC[0:8]}, vsgnacc0x${ABC[0:8]}), vinit_bias);
        __m128i vacc${ABC[4:8]} = _mm_add_epi32(_mm_unpackhi_epi16(vacc0x${ABC[0:8]}, vsgnacc0x${ABC[0:8]}), vinit_bias);

      __m128 vfpacc${ABC[0:4]} = _mm_cvtepi32_ps(vacc${ABC[0:4]});
      __m128 vfpacc${ABC[4:8]} = _mm_cvtepi32_ps(vacc${ABC[4:8]});

      vfpacc${ABC[0:4]} = _mm_mul_ps(vfpacc${ABC[0:4]}, vscale);
      vfpacc${ABC[4:8]} = _mm_mul_ps(vfpacc${ABC[4:8]}, vscale);

      vfpacc${ABC[0:4]} = _mm_min_ps(vfpacc${ABC[0:4]}, voutput_max_less_zero_point);
      vfpacc${ABC[4:8]} = _mm_min_ps(vfpacc${ABC[4:8]}, voutput_max_less_zero_point);

      vacc${ABC[0:4]} = _mm_cvtps_epi32(vfpacc${ABC[0:4]});
      vacc${ABC[4:8]} = _mm_cvtps_epi32(vfpacc${ABC[4:8]});

      __m128i vout${ABC[0:8]} = _mm_adds_epi16(_mm_packs_epi32(vacc${ABC[0:4]}, vacc${ABC[4:8]}), voutput_zero_point);
      $if SSE < 4:
        vout${ABC[0:8]} = _mm_max_epi16(vout${ABC[0:8]}, voutput_min);

      __m128i vout${ABC[0:8]}${ABC[0:8]} = _mm_packs_epi16(vout${ABC[0:8]}, vout${ABC[0:8]});
      $if SSE == 4:
        vout${ABC[0:8]}${ABC[0:8]} = _mm_max_epi8(vout${ABC[0:8]}${ABC[0:8]}, voutput_min);

      $if CHANNEL_TILE > 8:
        if XNN_LIKELY(channels >= 8) {
          _mm_storel_epi64((__m128i*) output, vout${ABC[0:8]}${ABC[0:8]});
          output += 8;
          channels -= 8;
        } else {
          $if SSE == 4:
            if (channels & 4) {
              *((uint32_t*) output) = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
              vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi64(vout${ABC[0:8]}${ABC[0:8]}, 32);
              output += 4;
            }
            if (channels & 2) {
              *((uint16_t*) output) = (uint16_t) _mm_extract_epi16(vout${ABC[0:8]}${ABC[0:8]}, 0);
              vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi32(vout${ABC[0:8]}${ABC[0:8]}, 16);
              output += 2;
            }
            if (channels & 1) {
              *output = (int8_t) _mm_extract_epi8(vout${ABC[0:8]}${ABC[0:8]}, 0);
              output += 1;
            }
          $else:
            if (channels & 4) {
              *((uint32_t*) output) = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
              vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi64(vout${ABC[0:8]}${ABC[0:8]}, 32);
              output += 4;
            }
            uint32_t vout${ABC[0:4]} = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
            if (channels & 2) {
              *((uint16_t*) output) = (uint16_t) vout${ABC[0:4]};
              vout${ABC[0:4]} >>= 16;
              output += 2;
            }
            if (channels & 1) {
              *output = (int8_t) vout${ABC[0:4]};
              output += 1;
            }
          channels = 0;
        }
      $else:
        $if SSE == 4:
          if (channels & 4) {
            *((uint32_t*) output) = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
            vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi64(vout${ABC[0:8]}${ABC[0:8]}, 32);
            output += 4;
          }
          if (channels & 2) {
            *((uint16_t*) output) = (uint16_t) _mm_extract_epi16(vout${ABC[0:8]}${ABC[0:8]}, 0);
            vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi32(vout${ABC[0:8]}${ABC[0:8]}, 16);
            output += 2;
          }
          if (channels & 1) {
            *output = (int8_t) _mm_extract_epi8(vout${ABC[0:8]}${ABC[0:8]}, 0);
          }
        $else:
          if (channels & 4) {
            *((uint32_t*) output) = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
            vout${ABC[0:8]}${ABC[0:8]} = _mm_srli_epi64(vout${ABC[0:8]}${ABC[0:8]}, 32);
            output += 4;
          }
          uint32_t vout${ABC[0:4]} = (uint32_t) _mm_cvtsi128_si32(vout${ABC[0:8]}${ABC[0:8]});
          if (channels & 2) {
            *((uint16_t*) output) = (uint16_t) vout${ABC[0:4]};
            vout${ABC[0:4]} >>= 16;
            output += 2;
          }
          if (channels & 1) {
            *output = (int8_t) vout${ABC[0:4]};
          }
    }${" while (channels != 0);" if CHANNEL_TILE > 8 else ""}
  }
}