1 // Auto-generated file. Do not edit! 2 // Template: src/f32-velu/scalar-rr2-p6.c.in 3 // Generator: tools/xngen 4 // 5 // Copyright 2020 Google LLC 6 // 7 // This source code is licensed under the BSD-style license found in the 8 // LICENSE file in the root directory of this source tree. 9 10 #include <assert.h> 11 #include <math.h> 12 13 #include <xnnpack/common.h> 14 #include <xnnpack/vunary.h> 15 16 #include <fp16/bitcasts.h> 17 18 xnn_f32_velu_ukernel__scalar_rr2_p6_x1(size_t n,const float * x,float * y,const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS (1)])19void xnn_f32_velu_ukernel__scalar_rr2_p6_x1( 20 size_t n, 21 const float* x, 22 float* y, 23 const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS(1)]) 24 { 25 assert(n % sizeof(float) == 0); 26 27 const float vprescale = params->scalar.prescale; 28 const float valpha = params->scalar.alpha; 29 const float vbeta = params->scalar.beta; 30 31 const float vmagic_bias = 0x1.8000FEp23f; 32 const float vlog2e = 0x1.715476p+0f; 33 const float vsat_cutoff = -0x1.154246p+4f; 34 const float vminus_ln2_hi = -0x1.62E440p-1f; 35 const float vminus_ln2_lo = 0x1.0105C6p-21f; 36 const float vc6 = 0x1.6b7338p-10f; 37 const float vc5 = 0x1.12278Ep-7f; 38 const float vc4 = 0x1.555716p-5f; 39 const float vc3 = 0x1.5554B0p-3f; 40 const float vc2 = 0x1.FFFFFEp-2f; 41 const float vone = 1.0f; 42 43 do { 44 float vx = *x++; 45 46 const float vz = vx * vprescale; 47 48 float vn = vz * vlog2e + vmagic_bias; 49 float vs = fp32_from_bits(fp32_to_bits(vn) << 23); 50 vn -= vmagic_bias; 51 52 float vt = vn * vminus_ln2_hi + vz; 53 vt = vn * vminus_ln2_lo + vt; 54 55 if XNN_UNPREDICTABLE(vz <= vsat_cutoff) { 56 vs = 0.0f; 57 vt = 0.0f; 58 } 59 60 float vp = vc6 * vt + vc5; 61 vp = vp * vt + vc4; 62 vp = vp * vt + vc3; 63 vp = vp * vt + vc2; 64 vp *= vt; 65 66 vt *= vs; 67 vs -= vone; 68 vp = vp * vt + vt; 69 const float ve = (vp + vs) * valpha; 70 71 float vy = vx * vbeta; 72 if XNN_UNPREDICTABLE(vx < 0.0f) { 73 vy = ve; 74 } 75 76 *y++ = vy; 77 78 n -= sizeof(float); 79 } while (n != 0); 80 } 81