1 // Auto-generated file. Do not edit!
2 // Template: src/f32-vsigmoid/avx2-rr1-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 <immintrin.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/vunary.h>
16
17
xnn_f32_vsigmoid_ukernel__avx2_rr1_p5_div_x16(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__avx2_rr1_p5_div_x16(
19 size_t n,
20 const float* x,
21 float* y,
22 const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS(1)])
23 {
24 assert(n % sizeof(float) == 0);
25
26 const __m256 vsign_mask = _mm256_load_ps(params->avx2_rr1_p5.sign_mask);
27 const __m256 vmagic_bias = _mm256_load_ps(params->avx2_rr1_p5.magic_bias);
28 const __m256 vlog2e = _mm256_load_ps(params->avx2_rr1_p5.log2e);
29 const __m256 vminus_ln2 = _mm256_load_ps(params->avx2_rr1_p5.minus_ln2);
30 const __m256 vc5 = _mm256_load_ps(params->avx2_rr1_p5.c5);
31 const __m256 vc4 = _mm256_load_ps(params->avx2_rr1_p5.c4);
32 const __m256 vc3 = _mm256_load_ps(params->avx2_rr1_p5.c3);
33 const __m256 vc2 = _mm256_load_ps(params->avx2_rr1_p5.c2);
34 const __m256 vc1 = _mm256_load_ps(params->avx2_rr1_p5.c1);
35 const __m256 vone = _mm256_load_ps(params->avx2_rr1_p5.one);
36 const __m256 vdenorm_cutoff = _mm256_load_ps(params->avx2_rr1_p5.denorm_cutoff);
37
38 for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
39 const __m256 vx0 = _mm256_loadu_ps(x);
40 const __m256 vx1 = _mm256_loadu_ps(x + 8);
41 x += 16;
42
43 const __m256 vz0 = _mm256_or_ps(vx0, vsign_mask);
44 const __m256 vz1 = _mm256_or_ps(vx1, vsign_mask);
45
46 __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
47 __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
48
49 const __m256 vs0 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn0), 23));
50 const __m256 vs1 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn1), 23));
51
52 vn0 = _mm256_sub_ps(vn0, vmagic_bias);
53 vn1 = _mm256_sub_ps(vn1, vmagic_bias);
54
55 __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
56 __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
57
58 __m256 vp0 = _mm256_fmadd_ps(vc5, vt0, vc4);
59 __m256 vp1 = _mm256_fmadd_ps(vc5, vt1, vc4);
60
61 vp0 = _mm256_fmadd_ps(vp0, vt0, vc3);
62 vp1 = _mm256_fmadd_ps(vp1, vt1, vc3);
63
64 vp0 = _mm256_fmadd_ps(vp0, vt0, vc2);
65 vp1 = _mm256_fmadd_ps(vp1, vt1, vc2);
66
67 vp0 = _mm256_fmadd_ps(vp0, vt0, vc1);
68 vp1 = _mm256_fmadd_ps(vp1, vt1, vc1);
69
70 vt0 = _mm256_mul_ps(vt0, vs0);
71 vt1 = _mm256_mul_ps(vt1, vs1);
72
73 const __m256 ve0 = _mm256_fmadd_ps(vt0, vp0, vs0);
74 const __m256 ve1 = _mm256_fmadd_ps(vt1, vp1, vs1);
75
76 const __m256 vd0 = _mm256_add_ps(ve0, vone);
77 const __m256 vd1 = _mm256_add_ps(ve1, vone);
78
79 __m256 vf0 = _mm256_div_ps(ve0, vd0);
80 __m256 vf1 = _mm256_div_ps(ve1, vd1);
81
82 vf0 = _mm256_andnot_ps(_mm256_cmp_ps(vz0, vdenorm_cutoff, _CMP_LT_OS), vf0);
83 vf1 = _mm256_andnot_ps(_mm256_cmp_ps(vz1, vdenorm_cutoff, _CMP_LT_OS), vf1);
84
85 vf0 = _mm256_blendv_ps(_mm256_sub_ps(vone, vf0), vf0, vx0);
86 vf1 = _mm256_blendv_ps(_mm256_sub_ps(vone, vf1), vf1, vx1);
87
88 _mm256_storeu_ps(y, vf0);
89 _mm256_storeu_ps(y + 8, vf1);
90 y += 16;
91 }
92 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
93 const __m256 vx = _mm256_loadu_ps(x);
94 x += 8;
95
96 const __m256 vz = _mm256_or_ps(vx, vsign_mask);
97
98 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
99 const __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
100 vn = _mm256_sub_ps(vn, vmagic_bias);
101
102 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
103
104 __m256 vp = _mm256_fmadd_ps(vc5, vt, vc4);
105 vp = _mm256_fmadd_ps(vp, vt, vc3);
106 vp = _mm256_fmadd_ps(vp, vt, vc2);
107 vp = _mm256_fmadd_ps(vp, vt, vc1);
108
109 vt = _mm256_mul_ps(vt, vs);
110 const __m256 ve = _mm256_fmadd_ps(vt, vp, vs);
111
112 const __m256 vd = _mm256_add_ps(ve, vone);
113 __m256 vf = _mm256_div_ps(ve, vd);
114
115 vf = _mm256_andnot_ps(_mm256_cmp_ps(vz, vdenorm_cutoff, _CMP_LT_OS), vf);
116 vf = _mm256_blendv_ps(_mm256_sub_ps(vone, vf), vf, vx);
117
118 _mm256_storeu_ps(y, vf);
119 y += 8;
120 }
121 if XNN_UNLIKELY(n != 0) {
122 assert(n >= 1 * sizeof(float));
123 assert(n <= 7 * sizeof(float));
124 const __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) ¶ms->avx2_rr1_p5.mask_table[7] - n));
125
126 const __m256 vx = _mm256_maskload_ps(x, vmask);
127
128 const __m256 vz = _mm256_or_ps(vx, vsign_mask);
129
130 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
131 const __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
132 vn = _mm256_sub_ps(vn, vmagic_bias);
133
134 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
135
136 __m256 vp = _mm256_fmadd_ps(vc5, vt, vc4);
137 vp = _mm256_fmadd_ps(vp, vt, vc3);
138 vp = _mm256_fmadd_ps(vp, vt, vc2);
139 vp = _mm256_fmadd_ps(vp, vt, vc1);
140
141 vt = _mm256_mul_ps(vt, vs);
142 const __m256 ve = _mm256_fmadd_ps(vt, vp, vs);
143
144 const __m256 vd = _mm256_add_ps(ve, vone);
145 __m256 vf = _mm256_div_ps(ve, vd);
146
147 vf = _mm256_andnot_ps(_mm256_cmp_ps(vz, vdenorm_cutoff, _CMP_LT_OS), vf);
148 vf = _mm256_blendv_ps(_mm256_sub_ps(vone, vf), vf, vx);
149
150 __m128 vf_lo = _mm256_castps256_ps128(vf);
151 if (n & (4 * sizeof(float))) {
152 _mm_storeu_ps(y, vf_lo);
153 vf_lo = _mm256_extractf128_ps(vf, 1);
154 y += 4;
155 }
156 if (n & (2 * sizeof(float))) {
157 _mm_storel_pi((__m64*) y, vf_lo);
158 vf_lo = _mm_movehl_ps(vf_lo, vf_lo);
159 y += 2;
160 }
161 if (n & (1 * sizeof(float))) {
162 _mm_store_ss(y, vf_lo);
163 }
164 }
165 }
166