1 // Auto-generated file. Do not edit!
2 // Template: src/f32-vsigmoid/neon-p5.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2019 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
12 #include <arm_neon.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/vunary.h>
16
17
xnn_f32_vsigmoid_ukernel__neon_rr2_p5_nr2recps_x8(size_t n,const float * x,float * y,const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_f32_vsigmoid_ukernel__neon_rr2_p5_nr2recps_x8(
19 size_t n,
20 const float* x,
21 float* y,
22 const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
23 {
24 assert(n % sizeof(float) == 0);
25
26 const float32x4_t vmagic_bias = vld1q_dup_f32(¶ms->neon_rr2_p5.magic_bias);
27 const float32x4_t vminus_log2e = vld1q_dup_f32(¶ms->neon_rr2_p5.minus_log2e);
28 const float32x4_t vln2_hi = vld1q_dup_f32(¶ms->neon_rr2_p5.ln2_hi);
29 const float32x4_t vln2_lo = vld1q_dup_f32(¶ms->neon_rr2_p5.ln2_lo);
30 const float32x4_t vc5 = vld1q_dup_f32(¶ms->neon_rr2_p5.c5);
31 const float32x4_t vc4 = vld1q_dup_f32(¶ms->neon_rr2_p5.c4);
32 const float32x4_t vc3 = vld1q_dup_f32(¶ms->neon_rr2_p5.c3);
33 const float32x4_t vc2 = vld1q_dup_f32(¶ms->neon_rr2_p5.c2);
34 const float32x4_t vc1 = vld1q_dup_f32(¶ms->neon_rr2_p5.c1);
35 const float32x4_t vone = vmovq_n_f32(1.0f);
36 const float32x4_t vdenorm_cutoff = vld1q_dup_f32(¶ms->neon_rr2_p5.denorm_cutoff);
37
38 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
39 const float32x4_t vx0123 = vld1q_f32(x); x += 4;
40 const float32x4_t vx4567 = vld1q_f32(x); x += 4;
41
42 const float32x4_t vz0123 = vabsq_f32(vx0123);
43 const float32x4_t vz4567 = vabsq_f32(vx4567);
44
45 float32x4_t vn0123 = vmlaq_f32(vmagic_bias, vz0123, vminus_log2e);
46 float32x4_t vn4567 = vmlaq_f32(vmagic_bias, vz4567, vminus_log2e);
47
48 const float32x4_t vs0123 = vreinterpretq_f32_s32(vshlq_n_s32(vreinterpretq_s32_f32(vn0123), 23));
49 const float32x4_t vs4567 = vreinterpretq_f32_s32(vshlq_n_s32(vreinterpretq_s32_f32(vn4567), 23));
50
51 vn0123 = vsubq_f32(vn0123, vmagic_bias);
52 vn4567 = vsubq_f32(vn4567, vmagic_bias);
53
54 float32x4_t vt0123 = vmlaq_f32(vz0123, vn0123, vln2_hi);
55 float32x4_t vt4567 = vmlaq_f32(vz4567, vn4567, vln2_hi);
56
57 vt0123 = vmlaq_f32(vt0123, vn0123, vln2_lo);
58 vt4567 = vmlaq_f32(vt4567, vn4567, vln2_lo);
59
60 float32x4_t vp0123 = vmlaq_f32(vc4, vc5, vt0123);
61 float32x4_t vp4567 = vmlaq_f32(vc4, vc5, vt4567);
62
63 vp0123 = vmlaq_f32(vc3, vp0123, vt0123);
64 vp4567 = vmlaq_f32(vc3, vp4567, vt4567);
65
66 vp0123 = vmlaq_f32(vc2, vp0123, vt0123);
67 vp4567 = vmlaq_f32(vc2, vp4567, vt4567);
68
69 vp0123 = vmlaq_f32(vc1, vp0123, vt0123);
70 vp4567 = vmlaq_f32(vc1, vp4567, vt4567);
71
72 vt0123 = vmulq_f32(vt0123, vs0123);
73 vt4567 = vmulq_f32(vt4567, vs4567);
74
75 const float32x4_t ve0123 = vmlaq_f32(vs0123, vp0123, vt0123);
76 const float32x4_t ve4567 = vmlaq_f32(vs4567, vp4567, vt4567);
77
78 const float32x4_t vd0123 = vaddq_f32(ve0123, vone);
79 const float32x4_t vd4567 = vaddq_f32(ve4567, vone);
80
81 float32x4_t vr0123 = vrecpeq_f32(vd0123);
82 float32x4_t vr4567 = vrecpeq_f32(vd4567);
83
84 vr0123 = vmulq_f32(vr0123, vrecpsq_f32(vr0123, vd0123));
85 vr4567 = vmulq_f32(vr4567, vrecpsq_f32(vr4567, vd4567));
86
87 vr0123 = vmulq_f32(vr0123, vrecpsq_f32(vr0123, vd0123));
88 vr4567 = vmulq_f32(vr4567, vrecpsq_f32(vr4567, vd4567));
89
90 float32x4_t vf0123 = vmulq_f32(ve0123, vr0123);
91 float32x4_t vf4567 = vmulq_f32(ve4567, vr4567);
92
93 vf0123 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf0123), vcagtq_f32(vx0123, vdenorm_cutoff)));
94 vf4567 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf4567), vcagtq_f32(vx4567, vdenorm_cutoff)));
95
96 const uint32x4_t vm0123 = vcltq_f32(vx0123, vmovq_n_f32(0.0f));
97 const uint32x4_t vm4567 = vcltq_f32(vx4567, vmovq_n_f32(0.0f));
98
99 vf0123 = vbslq_f32(vm0123, vf0123, vsubq_f32(vone, vf0123));
100 vf4567 = vbslq_f32(vm4567, vf4567, vsubq_f32(vone, vf4567));
101
102 vst1q_f32(y, vf0123); y += 4;
103 vst1q_f32(y, vf4567); y += 4;
104 }
105 for (; n >= 4 * sizeof(float); n -= 4 * sizeof(float)) {
106 const float32x4_t vx = vld1q_f32(x); x += 4;
107
108 const float32x4_t vz = vabsq_f32(vx);
109
110 float32x4_t vn = vmlaq_f32(vmagic_bias, vz, vminus_log2e);
111 const float32x4_t vs = vreinterpretq_f32_s32(vshlq_n_s32(vreinterpretq_s32_f32(vn), 23));
112 vn = vsubq_f32(vn, vmagic_bias);
113 float32x4_t vt = vmlaq_f32(vz, vn, vln2_hi);
114 vt = vmlaq_f32(vt, vn, vln2_lo);
115
116 float32x4_t vp = vmlaq_f32(vc4, vc5, vt);
117 vp = vmlaq_f32(vc3, vp, vt);
118 vp = vmlaq_f32(vc2, vp, vt);
119 vp = vmlaq_f32(vc1, vp, vt);
120
121 vt = vmulq_f32(vt, vs);
122 const float32x4_t ve = vmlaq_f32(vs, vp, vt);
123 const float32x4_t vd = vaddq_f32(ve, vone);
124
125 float32x4_t vr = vrecpeq_f32(vd);
126 vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
127 vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
128
129 float32x4_t vf = vmulq_f32(ve, vr);
130 vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcagtq_f32(vx, vdenorm_cutoff)));
131 const uint32x4_t vm = vcltq_f32(vx, vmovq_n_f32(0.0f));
132 vf = vbslq_f32(vm, vf, vsubq_f32(vone, vf));
133
134 vst1q_f32(y, vf); y += 4;
135 }
136 if XNN_UNLIKELY(n != 0) {
137 const float32x4_t vx = vld1q_f32(x);
138
139 const float32x4_t vz = vabsq_f32(vx);
140
141 float32x4_t vn = vmlaq_f32(vmagic_bias, vz, vminus_log2e);
142 const float32x4_t vs = vreinterpretq_f32_s32(vshlq_n_s32(vreinterpretq_s32_f32(vn), 23));
143 vn = vsubq_f32(vn, vmagic_bias);
144 float32x4_t vt = vmlaq_f32(vz, vn, vln2_hi);
145 vt = vmlaq_f32(vt, vn, vln2_lo);
146
147 float32x4_t vp = vmlaq_f32(vc4, vc5, vt);
148 vp = vmlaq_f32(vc3, vp, vt);
149 vp = vmlaq_f32(vc2, vp, vt);
150 vp = vmlaq_f32(vc1, vp, vt);
151
152 vt = vmulq_f32(vt, vs);
153 const float32x4_t ve = vmlaq_f32(vs, vp, vt);
154 const float32x4_t vd = vaddq_f32(ve, vone);
155
156 float32x4_t vr = vrecpeq_f32(vd);
157 vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
158 vr = vmulq_f32(vr, vrecpsq_f32(vr, vd));
159
160 float32x4_t vf = vmulq_f32(ve, vr);
161 vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcagtq_f32(vx, vdenorm_cutoff)));
162 const uint32x4_t vm = vcltq_f32(vx, vmovq_n_f32(0.0f));
163 vf = vbslq_f32(vm, vf, vsubq_f32(vone, vf));
164
165 float32x2_t vf_lo = vget_low_f32(vf);
166 if (n & (2 * sizeof(float))) {
167 vst1_f32(y, vf_lo); y += 2;
168 vf_lo = vget_high_f32(vf);
169 }
170 if (n & (1 * sizeof(float))) {
171 vst1_lane_f32(y, vf_lo, 0);
172 }
173 }
174 }
175