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_x4(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_x4(
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 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
44 float vx0 = x[0];
45 float vx1 = x[1];
46 float vx2 = x[2];
47 float vx3 = x[3];
48 x += 4;
49
50 const float vz0 = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx0 * vprescale, vsat_cutoff), 0.0f);
51 const float vz1 = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx1 * vprescale, vsat_cutoff), 0.0f);
52 const float vz2 = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx2 * vprescale, vsat_cutoff), 0.0f);
53 const float vz3 = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx3 * vprescale, vsat_cutoff), 0.0f);
54
55 float vn0 = vz0 * vlog2e + vmagic_bias;
56 float vn1 = vz1 * vlog2e + vmagic_bias;
57 float vn2 = vz2 * vlog2e + vmagic_bias;
58 float vn3 = vz3 * vlog2e + vmagic_bias;
59
60 float vs0 = fp32_from_bits(fp32_to_bits(vn0) << 23);
61 vn0 -= vmagic_bias;
62 float vs1 = fp32_from_bits(fp32_to_bits(vn1) << 23);
63 vn1 -= vmagic_bias;
64 float vs2 = fp32_from_bits(fp32_to_bits(vn2) << 23);
65 vn2 -= vmagic_bias;
66 float vs3 = fp32_from_bits(fp32_to_bits(vn3) << 23);
67 vn3 -= vmagic_bias;
68
69 float vt0 = vn0 * vminus_ln2_hi + vz0;
70 float vt1 = vn1 * vminus_ln2_hi + vz1;
71 float vt2 = vn2 * vminus_ln2_hi + vz2;
72 float vt3 = vn3 * vminus_ln2_hi + vz3;
73
74 vt0 = vn0 * vminus_ln2_lo + vt0;
75 vt1 = vn1 * vminus_ln2_lo + vt1;
76 vt2 = vn2 * vminus_ln2_lo + vt2;
77 vt3 = vn3 * vminus_ln2_lo + vt3;
78
79
80 float vp0 = vc6 * vt0 + vc5;
81 float vp1 = vc6 * vt1 + vc5;
82 float vp2 = vc6 * vt2 + vc5;
83 float vp3 = vc6 * vt3 + vc5;
84
85 vp0 = vp0 * vt0 + vc4;
86 vp1 = vp1 * vt1 + vc4;
87 vp2 = vp2 * vt2 + vc4;
88 vp3 = vp3 * vt3 + vc4;
89
90 vp0 = vp0 * vt0 + vc3;
91 vp1 = vp1 * vt1 + vc3;
92 vp2 = vp2 * vt2 + vc3;
93 vp3 = vp3 * vt3 + vc3;
94
95 vp0 = vp0 * vt0 + vc2;
96 vp1 = vp1 * vt1 + vc2;
97 vp2 = vp2 * vt2 + vc2;
98 vp3 = vp3 * vt3 + vc2;
99
100 vp0 *= vt0;
101 vp1 *= vt1;
102 vp2 *= vt2;
103 vp3 *= vt3;
104
105 vt0 *= vs0;
106 vs0 -= vone;
107 vt1 *= vs1;
108 vs1 -= vone;
109 vt2 *= vs2;
110 vs2 -= vone;
111 vt3 *= vs3;
112 vs3 -= vone;
113
114 vp0 = vp0 * vt0 + vt0;
115 vp1 = vp1 * vt1 + vt1;
116 vp2 = vp2 * vt2 + vt2;
117 vp3 = vp3 * vt3 + vt3;
118
119 const float ve0 = (vp0 + vs0) * valpha;
120 float vy0 = __builtin_wasm_max_f32(vx0 * vbeta, 0.0f);
121 const float ve1 = (vp1 + vs1) * valpha;
122 float vy1 = __builtin_wasm_max_f32(vx1 * vbeta, 0.0f);
123 const float ve2 = (vp2 + vs2) * valpha;
124 float vy2 = __builtin_wasm_max_f32(vx2 * vbeta, 0.0f);
125 const float ve3 = (vp3 + vs3) * valpha;
126 float vy3 = __builtin_wasm_max_f32(vx3 * vbeta, 0.0f);
127
128 vy0 += __builtin_wasm_min_f32(ve0, 0.0f);
129 vy1 += __builtin_wasm_min_f32(ve1, 0.0f);
130 vy2 += __builtin_wasm_min_f32(ve2, 0.0f);
131 vy3 += __builtin_wasm_min_f32(ve3, 0.0f);
132
133 y[0] = vy0;
134 y[1] = vy1;
135 y[2] = vy2;
136 y[3] = vy3;
137 y += 4;
138 }
139 if XNN_UNLIKELY(n != 0) {
140 do {
141 float vx = *x++;
142
143 const float vz = __builtin_wasm_min_f32(__builtin_wasm_max_f32(vx * vprescale, vsat_cutoff), 0.0f);
144
145 float vn = vz * vlog2e + vmagic_bias;
146 float vs = fp32_from_bits(fp32_to_bits(vn) << 23);
147 vn -= vmagic_bias;
148
149 float vt = vn * vminus_ln2_hi + vz;
150 vt = vn * vminus_ln2_lo + vt;
151
152
153 float vp = vc6 * vt + vc5;
154 vp = vp * vt + vc4;
155 vp = vp * vt + vc3;
156 vp = vp * vt + vc2;
157 vp *= vt;
158
159 vt *= vs;
160 vs -= vone;
161 vp = vp * vt + vt;
162 const float ve = (vp + vs) * valpha;
163
164 float vy = __builtin_wasm_max_f32(vx * vbeta, 0.0f);
165 vy += __builtin_wasm_min_f32(ve, 0.0f);
166
167 *y++ = vy;
168
169 n -= sizeof(float);
170 } while (n != 0);
171 }
172 }
173