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__wasm_rr2_p6_x1(size_t n,const float * x,float * y,const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_velu_ukernel__wasm_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 = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx * vprescale, vsat_cutoff), 0.0f);
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
56 float vp = vc6 * vt + vc5;
57 vp = vp * vt + vc4;
58 vp = vp * vt + vc3;
59 vp = vp * vt + vc2;
60 vp *= vt;
61
62 vt *= vs;
63 vs -= vone;
64 vp = vp * vt + vt;
65 const float ve = (vp + vs) * valpha;
66
67 float vy = __builtin_wasm_max_f32(vx * vbeta, 0.0f);
68 vy += __builtin_wasm_min_f32(ve, 0.0f);
69
70 *y++ = vy;
71
72 n -= sizeof(float);
73 } while (n != 0);
74 }
75