text: // Auto-generated file. Do not edit!
  //   Template: src/f32-vsigmoid/neon-lut64-p2.c.in
  //   Generator: tools/xngen
  //
  // Copyright 2019 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/common.h>
  #include <xnnpack/vunary.h>
  
  
  extern XNN_INTERNAL const float xnn_table_exp2minus_k_over_64[64];
  
  void xnn_f32_vsigmoid_ukernel__neonfma_rr1_lut64_p2_nr1recps1fma_x8(
      size_t n,
      const float* x,
      float* y,
      const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
  {
    assert(n % sizeof(float) == 0);
  
    const float32x4_t vmagic_bias = vld1q_dup_f32(&params->neonfma_rr1_lut64_p2.magic_bias);
    const float32x4_t vminus_log2e = vld1q_dup_f32(&params->neonfma_rr1_lut64_p2.minus_log2e);
    const int32x4_t vindex_mask = vmovq_n_s32(INT32_C(0x3F));
    const float32x4_t vln2 = vld1q_dup_f32(&params->neonfma_rr1_lut64_p2.ln2);
    const float32x4_t vc2 = vld1q_dup_f32(&params->neonfma_rr1_lut64_p2.c2);
    const float32x4_t vone = vmovq_n_f32(1.0f);
    const float32x4_t vdenorm_cutoff = vld1q_dup_f32(&params->neonfma_rr1_lut64_p2.denorm_cutoff);
  
    for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
      const float32x4_t vx0123 = vld1q_f32(x); x += 4;
      const float32x4_t vx4567 = vld1q_f32(x); x += 4;
  
      const float32x4_t vz0123 = vabsq_f32(vx0123);
      const float32x4_t vz4567 = vabsq_f32(vx4567);
  
      float32x4_t vn0123 = vfmaq_f32(vmagic_bias, vz0123, vminus_log2e);
      float32x4_t vn4567 = vfmaq_f32(vmagic_bias, vz4567, vminus_log2e);
  
      const int32x4_t ve0123 = vshlq_n_s32(vreinterpretq_s32_f32(vn0123), 17);
      const int32x4_t ve4567 = vshlq_n_s32(vreinterpretq_s32_f32(vn4567), 17);
  
      // Use bits 0:6 bits of n, as integer, as an index for table lookup of l := 2**(n % 64).
      const uint64x2_t vidx0123 = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn0123), vindex_mask));
      const uint64x2_t vidx4567 = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn4567), vindex_mask));
  
      const uint64_t vidx01 = vgetq_lane_u64(vidx0123, 0);
      const uint64_t vidx23 = vgetq_lane_u64(vidx0123, 1);
      float32x2_t vl01 = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx01]);
      float32x2_t vl23 = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx23]);
      const uint64_t vidx45 = vgetq_lane_u64(vidx4567, 0);
      const uint64_t vidx67 = vgetq_lane_u64(vidx4567, 1);
      float32x2_t vl45 = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx45]);
      float32x2_t vl67 = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx67]);
  
      vl01 = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx01 >> 32)], vl01, 1);
      vl23 = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx23 >> 32)], vl23, 1);
      const float32x4_t vl0123 = vcombine_f32(vl01, vl23);
      vl45 = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx45 >> 32)], vl45, 1);
      vl67 = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx67 >> 32)], vl67, 1);
      const float32x4_t vl4567 = vcombine_f32(vl45, vl67);
  
      const float32x4_t vs0123 = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl0123), ve0123));
      const float32x4_t vs4567 = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl4567), ve4567));
  
      vn0123 = vsubq_f32(vn0123, vmagic_bias);
      vn4567 = vsubq_f32(vn4567, vmagic_bias);
  
      float32x4_t vt0123 = vfmaq_f32(vz0123, vn0123, vln2);
      float32x4_t vt4567 = vfmaq_f32(vz4567, vn4567, vln2);
  
      float32x4_t vp0123 = vmulq_f32(vt0123, vc2);
      float32x4_t vp4567 = vmulq_f32(vt4567, vc2);
  
      vp0123 = vfmsq_f32(vt0123, vp0123, vt0123);
      vp4567 = vfmsq_f32(vt4567, vp4567, vt4567);
  
      const float32x4_t vy0123 = vfmsq_f32(vs0123, vs0123, vp0123);
      const float32x4_t vy4567 = vfmsq_f32(vs4567, vs4567, vp4567);
  
      const float32x4_t vd0123 = vaddq_f32(vy0123, vone);
      const float32x4_t vd4567 = vaddq_f32(vy4567, vone);
  
      float32x4_t vr0123 = vrecpeq_f32(vd0123);
      float32x4_t vr4567 = vrecpeq_f32(vd4567);
  
      vr0123 = vmulq_f32(vr0123, vrecpsq_f32(vr0123, vd0123));
      vr4567 = vmulq_f32(vr4567, vrecpsq_f32(vr4567, vd4567));
  
      vr0123 = vfmaq_f32(vr0123, vr0123, vfmsq_f32(vone, vr0123, vd0123));
      vr4567 = vfmaq_f32(vr4567, vr4567, vfmsq_f32(vone, vr4567, vd4567));
  
      float32x4_t vf0123 = vmulq_f32(vy0123, vr0123);
      float32x4_t vf4567 = vmulq_f32(vy4567, vr4567);
  
      vf0123 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf0123), vcagtq_f32(vx0123, vdenorm_cutoff)));
      vf4567 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf4567), vcagtq_f32(vx4567, vdenorm_cutoff)));
  
      const uint32x4_t vm0123 = vcltq_f32(vx0123, vmovq_n_f32(0.0f));
      const uint32x4_t vm4567 = vcltq_f32(vx4567, vmovq_n_f32(0.0f));
  
      vf0123 = vbslq_f32(vm0123, vf0123, vsubq_f32(vone, vf0123));
      vf4567 = vbslq_f32(vm4567, vf4567, vsubq_f32(vone, vf4567));
  
      vst1q_f32(y, vf0123); y += 4;
      vst1q_f32(y, vf4567); y += 4;
    }
    for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
      const float32x4_t vx = vld1q_f32(x); x += 4;
  
      const float32x4_t vz = vabsq_f32(vx);
  
      float32x4_t vn = vfmaq_f32(vmagic_bias, vz, vminus_log2e);
      const int32x4_t ve = vshlq_n_s32(vreinterpretq_s32_f32(vn), 17);
  
      const uint64x2_t vidx = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn), vindex_mask));
      const uint64_t vidx_lo = vgetq_lane_u64(vidx, 0);
      const uint64_t vidx_hi = vgetq_lane_u64(vidx, 1);
      float32x2_t vl_lo = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx_lo]);
      float32x2_t vl_hi = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx_hi]);
      vl_lo = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx_lo >> 32)], vl_lo, 1);
      vl_hi = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx_hi >> 32)], vl_hi, 1);
      const float32x4_t vl = vcombine_f32(vl_lo, vl_hi);
  
      const float32x4_t vs = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl), ve));
      vn = vsubq_f32(vn, vmagic_bias);
      float32x4_t vt = vfmaq_f32(vz, vn, vln2);
  
      float32x4_t vp = vmulq_f32(vt, vc2);
      vp = vfmsq_f32(vt, vp, vt);
  
      const float32x4_t vy = vfmsq_f32(vs, vs, vp);
      const float32x4_t vd = vaddq_f32(vy, vone);
  
      float32x4_t vr = vrecpeq_f32(vd);
      vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
      vr = vfmaq_f32(vr, vr, vfmsq_f32(vone, vr, vd));
  
      float32x4_t vf = vmulq_f32(vy, vr);
      vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcagtq_f32(vx, vdenorm_cutoff)));
      const uint32x4_t vm = vcltq_f32(vx, vmovq_n_f32(0.0f));
      vf = vbslq_f32(vm, vf, vsubq_f32(vone, vf));
  
      vst1q_f32(y, vf); y += 4;
    }
    if XNN_UNLIKELY(n != 0) {
      const float32x4_t vx = vld1q_f32(x);
  
      const float32x4_t vz = vabsq_f32(vx);
  
      float32x4_t vn = vfmaq_f32(vmagic_bias, vz, vminus_log2e);
      const int32x4_t ve = vshlq_n_s32(vreinterpretq_s32_f32(vn), 17);
  
      const uint64x2_t vidx = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn), vindex_mask));
      const uint64_t vidx_lo = vgetq_lane_u64(vidx, 0);
      const uint64_t vidx_hi = vgetq_lane_u64(vidx, 1);
      float32x2_t vl_lo = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx_lo]);
      float32x2_t vl_hi = vld1_dup_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) vidx_hi]);
      vl_lo = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx_lo >> 32)], vl_lo, 1);
      vl_hi = vld1_lane_f32(&xnn_table_exp2minus_k_over_64[(uint32_t) (vidx_hi >> 32)], vl_hi, 1);
      const float32x4_t vl = vcombine_f32(vl_lo, vl_hi);
  
      const float32x4_t vs = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl), ve));
      vn = vsubq_f32(vn, vmagic_bias);
      float32x4_t vt = vfmaq_f32(vz, vn, vln2);
  
      float32x4_t vp = vmulq_f32(vt, vc2);
      vp = vfmsq_f32(vt, vp, vt);
  
      const float32x4_t vy = vfmsq_f32(vs, vs, vp);
      const float32x4_t vd = vaddq_f32(vy, vone);
  
      float32x4_t vr = vrecpeq_f32(vd);
      vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
      vr = vfmaq_f32(vr, vr, vfmsq_f32(vone, vr, vd));
  
      float32x4_t vf = vmulq_f32(vy, vr);
      vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcagtq_f32(vx, vdenorm_cutoff)));
      const uint32x4_t vm = vcltq_f32(vx, vmovq_n_f32(0.0f));
      vf = vbslq_f32(vm, vf, vsubq_f32(vone, vf));
  
      float32x2_t vf_lo = vget_low_f32(vf);
      if (n & (2 * sizeof(float))) {
        vst1_f32(y, vf_lo); y += 2;
        vf_lo = vget_high_f32(vf);
      }
      if (n & (1 * sizeof(float))) {
        vst1_lane_f32(y, vf_lo, 0);
      }
    }
  }
  