1 // Auto-generated file. Do not edit! 2 // Template: src/f32-velu/scalar-rr2-lut16-p3.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/math.h> 15 #include <xnnpack/vunary.h> 16 17 18 extern XNN_INTERNAL const uint32_t xnn_table_exp2minus_k_over_16[16]; 19 xnn_f32_velu_ukernel__scalar_rr2_lut16_p3_x1(size_t n,const float * x,float * y,const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS (1)])20void xnn_f32_velu_ukernel__scalar_rr2_lut16_p3_x1( 21 size_t n, 22 const float* x, 23 float* y, 24 const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS(1)]) 25 { 26 assert(n % sizeof(float) == 0); 27 28 const float vprescale = params->scalar_rr2_lut16_p3.prescale; 29 const float valpha = params->scalar_rr2_lut16_p3.alpha; 30 const float vbeta = params->scalar_rr2_lut16_p3.beta; 31 const float vmagic_bias = params->scalar_rr2_lut16_p3.magic_bias; 32 const float vlog2e = params->scalar_rr2_lut16_p3.log2e; 33 const uint32_t vindex_mask = UINT32_C(0xF); 34 const float vsat_cutoff = params->scalar_rr2_lut16_p3.sat_cutoff; 35 const float vminus_ln2_hi = params->scalar_rr2_lut16_p3.minus_ln2_hi; 36 const float vminus_ln2_lo = params->scalar_rr2_lut16_p3.minus_ln2_lo; 37 const float vc3 = params->scalar_rr2_lut16_p3.c3; 38 const float vc2 = params->scalar_rr2_lut16_p3.c2; 39 const float vone = params->scalar_rr2_lut16_p3.one; 40 41 do { 42 float vx = *x++; 43 44 const float vz = vx * vprescale; 45 46 float vn = vz * vlog2e + vmagic_bias; 47 const uint32_t ven = float_as_uint32(vn) << 19; 48 const uint32_t vidx = float_as_uint32(vn) & vindex_mask; 49 vn -= vmagic_bias; 50 51 float vt = vn * vminus_ln2_hi + vz; 52 float vs = uint32_as_float(xnn_table_exp2minus_k_over_16[vidx] + ven); 53 54 vt = vn * vminus_ln2_lo + vt; 55 if XNN_UNPREDICTABLE(vz <= vsat_cutoff) { 56 vs = 0.0f; 57 vt = 0.0f; 58 } 59 60 float vp = vc3 * vt + vc2; 61 vp *= vt; 62 63 vt *= vs; 64 vs -= vone; 65 vp = vp * vt + vt; 66 const float ve = (vp + vs) * valpha; 67 68 float vy = vx * vbeta; 69 if XNN_UNPREDICTABLE(vx < 0.0f) { 70 vy = ve; 71 } 72 73 *y++ = vy; 74 75 n -= sizeof(float); 76 } while (n != 0); 77 } 78