xref: /aosp_15_r20/external/XNNPACK/src/bf16-gemm/gen/1x8c2-minmax-neonbf16-bfdot-lane-ld128.c (revision 4bdc94577ba0e567308109d787f7fec7b531ce36)

// Auto-generated file. Do not edit!
//   Template: src/bf16-gemm/c2-neonbf16-bfdot-lane-ld128.c.in
//   Generator: tools/xngen
//
// Copyright 2022 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 <arm_neon.h>

#include <xnnpack/gemm.h>


void xnn_bf16_gemm_minmax_ukernel_1x8c2__neonbf16_bfdot_lane_ld128(
    size_t mr,
    size_t nc,
    size_t kc,
    const void* restrict a,
    size_t a_stride,
    const void* restrict w_ptr,
    void* restrict c,
    size_t cm_stride,
    size_t cn_stride,
    const union xnn_bf16_minmax_params params[restrict XNN_MIN_ELEMENTS(1)])
{
  assert(mr != 0);
  assert(mr <= 1);
  assert(nc != 0);
  assert(kc != 0);
  assert(kc % sizeof(bfloat16_t) == 0);
  assert(a != NULL);
  assert(w_ptr != NULL);
  assert(c != NULL);

  const bfloat16_t* a0 = (const bfloat16_t*) a;
  bfloat16_t* c0 = (bfloat16_t*) c;

  const bfloat16_t* w = (const bfloat16_t*) w_ptr;
  do {
    float32x4_t vacc0x0123 = vcvt_f32_bf16(vld1_bf16(w)); w += 4;
    float32x4_t vacc0x4567 = vcvt_f32_bf16(vld1_bf16(w)); w += 4;

    size_t k = kc;
    for (; k >= 8 * sizeof(bfloat16_t); k -= 8 * sizeof(bfloat16_t)) {
      const bfloat16x8_t va0 = vld1q_bf16(a0); a0 += 8;

      const bfloat16x8_t vb0123c01 = vld1q_bf16(w); w += 8;
      const bfloat16x8_t vb4567c01 = vld1q_bf16(w); w += 8;

      vacc0x0123 = vbfdotq_laneq_f32(vacc0x0123, vb0123c01, va0, 0);
      vacc0x4567 = vbfdotq_laneq_f32(vacc0x4567, vb4567c01, va0, 0);
      const bfloat16x8_t vb0123c23 = vld1q_bf16(w); w += 8;
      const bfloat16x8_t vb4567c23 = vld1q_bf16(w); w += 8;

      vacc0x0123 = vbfdotq_laneq_f32(vacc0x0123, vb0123c23, va0, 1);
      vacc0x4567 = vbfdotq_laneq_f32(vacc0x4567, vb4567c23, va0, 1);
      const bfloat16x8_t vb0123c45 = vld1q_bf16(w); w += 8;
      const bfloat16x8_t vb4567c45 = vld1q_bf16(w); w += 8;

      vacc0x0123 = vbfdotq_laneq_f32(vacc0x0123, vb0123c45, va0, 2);
      vacc0x4567 = vbfdotq_laneq_f32(vacc0x4567, vb4567c45, va0, 2);
      const bfloat16x8_t vb0123c67 = vld1q_bf16(w); w += 8;
      const bfloat16x8_t vb4567c67 = vld1q_bf16(w); w += 8;

      vacc0x0123 = vbfdotq_laneq_f32(vacc0x0123, vb0123c67, va0, 3);
      vacc0x4567 = vbfdotq_laneq_f32(vacc0x4567, vb4567c67, va0, 3);
    }
    if XNN_UNLIKELY(k != 0) {
      const bfloat16x8_t va0 = vld1q_bf16(a0); a0 = (const bfloat16_t*) ((uintptr_t) a0 + k);

      const bfloat16x8_t vb0123c01 = vld1q_bf16(w); w += 8;
      const bfloat16x8_t vb4567c01 = vld1q_bf16(w); w += 8;

      const uint32x4_t va0c01 = vdupq_lane_u32(vreinterpret_u32_bf16(vget_low_bf16(va0)), 0);

      const uint32x4_t vm0123c01 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb0123c01), vmovq_n_u16(0)));
      const uint32x4_t vm4567c01 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb4567c01), vmovq_n_u16(0)));

      const uint32x4_t va0x0123c01 = vbicq_u32(va0c01, vm0123c01);
      vacc0x0123 = vbfdotq_f32(vacc0x0123, vb0123c01, vreinterpretq_bf16_u32(va0x0123c01));
      const uint32x4_t va0x4567c01 = vbicq_u32(va0c01, vm4567c01);
      vacc0x4567 = vbfdotq_f32(vacc0x4567, vb4567c01, vreinterpretq_bf16_u32(va0x4567c01));

      if (k > 2 * sizeof(bfloat16_t)) {
        const bfloat16x8_t vb0123c23 = vld1q_bf16(w); w += 8;
        const bfloat16x8_t vb4567c23 = vld1q_bf16(w); w += 8;

        const uint32x4_t va0c23 = vdupq_lane_u32(vreinterpret_u32_bf16(vget_low_bf16(va0)), 1);

        const uint32x4_t vm0123c23 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb0123c23), vmovq_n_u16(0)));
        const uint32x4_t vm4567c23 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb4567c23), vmovq_n_u16(0)));

        const uint32x4_t va0x0123c23 = vbicq_u32(va0c23, vm0123c23);
        vacc0x0123 = vbfdotq_f32(vacc0x0123, vb0123c23, vreinterpretq_bf16_u32(va0x0123c23));
        const uint32x4_t va0x4567c23 = vbicq_u32(va0c23, vm4567c23);
        vacc0x4567 = vbfdotq_f32(vacc0x4567, vb4567c23, vreinterpretq_bf16_u32(va0x4567c23));

        if (k > 4 * sizeof(bfloat16_t)) {
          const bfloat16x8_t vb0123c45 = vld1q_bf16(w); w += 8;
          const bfloat16x8_t vb4567c45 = vld1q_bf16(w); w += 8;

          const uint32x4_t va0c45 = vdupq_lane_u32(vreinterpret_u32_bf16(vget_high_bf16(va0)), 0);

          const uint32x4_t vm0123c45 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb0123c45), vmovq_n_u16(0)));
          const uint32x4_t vm4567c45 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb4567c45), vmovq_n_u16(0)));

          const uint32x4_t va0x0123c45 = vbicq_u32(va0c45, vm0123c45);
          vacc0x0123 = vbfdotq_f32(vacc0x0123, vb0123c45, vreinterpretq_bf16_u32(va0x0123c45));
          const uint32x4_t va0x4567c45 = vbicq_u32(va0c45, vm4567c45);
          vacc0x4567 = vbfdotq_f32(vacc0x4567, vb4567c45, vreinterpretq_bf16_u32(va0x4567c45));

          if (k > 6 * sizeof(bfloat16_t)) {
            const bfloat16x8_t vb0123c67 = vld1q_bf16(w); w += 8;
            const bfloat16x8_t vb4567c67 = vld1q_bf16(w); w += 8;

            const uint32x4_t va0c67 = vdupq_lane_u32(vreinterpret_u32_bf16(vget_high_bf16(va0)), 1);

            const uint32x4_t vm0123c67 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb0123c67), vmovq_n_u16(0)));
            const uint32x4_t vm4567c67 = vreinterpretq_u32_u16(vceqq_u16(vreinterpretq_u16_bf16(vb4567c67), vmovq_n_u16(0)));

            const uint32x4_t va0x0123c67 = vbicq_u32(va0c67, vm0123c67);
            vacc0x0123 = vbfdotq_f32(vacc0x0123, vb0123c67, vreinterpretq_bf16_u32(va0x0123c67));
            const uint32x4_t va0x4567c67 = vbicq_u32(va0c67, vm4567c67);
            vacc0x4567 = vbfdotq_f32(vacc0x4567, vb4567c67, vreinterpretq_bf16_u32(va0x4567c67));
          }
        }
      }
    }

    const float32x4_t vmax = vld1q_dup_f32(&params->scalar.max);
    vacc0x0123 = vminq_f32(vacc0x0123, vmax);
    vacc0x4567 = vminq_f32(vacc0x4567, vmax);

    const float32x4_t vmin = vld1q_dup_f32(&params->scalar.min);
    vacc0x0123 = vmaxq_f32(vacc0x0123, vmin);
    vacc0x4567 = vmaxq_f32(vacc0x4567, vmin);

    bfloat16x4_t vout0x0123 = vcvt_bf16_f32(vacc0x0123);
    bfloat16x4_t vout0x4567 = vcvt_bf16_f32(vacc0x4567);

    if XNN_LIKELY(nc >= 8) {
      vst1_bf16(c0, vout0x0123);
      vst1_bf16(c0 + 4, vout0x4567);
      c0 = (bfloat16_t*) ((uintptr_t) c0 + cn_stride);

      a0 = (const bfloat16_t*) ((uintptr_t) a0 - kc);

      nc -= 8;
    } else {
      if (nc & 4) {
        vst1_bf16(c0, vout0x0123); c0 += 4;

        vout0x0123 = vout0x4567;
      }
      if (nc & 2) {
        vst1_lane_u32((void*) c0, vreinterpret_u32_bf16(vout0x0123), 0); c0 += 2;

        vout0x0123 = vreinterpret_bf16_u16(vext_u16(vreinterpret_u16_bf16(vout0x0123), vreinterpret_u16_bf16(vout0x0123), 2));
      }
      if (nc & 1) {
        vst1_lane_bf16(c0, vout0x0123, 0);
      }

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