1 // Auto-generated file. Do not edit!
2 // Template: src/f32-velu/avx2-rr1-lut4-p4-perm.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
12 #include <immintrin.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/vunary.h>
16
17
18 static const int32_t mask_table[14] = {-1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0};
19
xnn_f32_velu_ukernel__avx2_rr1_lut4_p4_perm_x16(size_t n,const float * x,float * y,const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS (1)])20 void xnn_f32_velu_ukernel__avx2_rr1_lut4_p4_perm_x16(
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 __m256 vprescale = _mm256_broadcast_ps((const __m128*) params->sse.prescale);
29 const __m256 valpha = _mm256_broadcast_ps((const __m128*) params->sse.alpha);
30 const __m256 vbeta = _mm256_broadcast_ps((const __m128*) params->sse.beta);
31
32 const __m256 vsat_cutoff = _mm256_set1_ps(-0x1.154246p+4f);
33 const __m256 vmagic_bias = _mm256_set1_ps(0x1.800000p21f);
34 const __m256 vlog2e = _mm256_set1_ps(0x1.715476p+0f);
35 const __m256 vtable = _mm256_set_ps(
36 0x1.EE89FAp-1f, 0x1.EA09E6p-1f, 0x1.F06FE0p-1f, 0x1.000000p+0f,
37 0x1.EE89FAp-1f, 0x1.EA09E6p-1f, 0x1.F06FE0p-1f, 0x1.000000p+0f);
38 const __m256 vminus_ln2 = _mm256_set1_ps(-0x1.62E43p-1f);
39 const __m256 vc4 = _mm256_set1_ps(0x1.554F9Ap-5f);
40 const __m256 vc3 = _mm256_set1_ps(0x1.557082p-3f);
41 const __m256 vc2 = _mm256_set1_ps(0x1.000002p-1f);
42
43 for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
44 __m256 vx0 = _mm256_loadu_ps(x);
45 __m256 vx1 = _mm256_loadu_ps(x + 8);
46 x += 16;
47
48 const __m256 vz0 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx0, vprescale));
49 const __m256 vz1 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx1, vprescale));
50
51 __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
52 __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
53
54 const __m256i ven0 = _mm256_slli_epi32(_mm256_castps_si256(vn0), 21);
55 const __m256i vl0 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn0)));
56 vn0 = _mm256_sub_ps(vn0, vmagic_bias);
57 const __m256i ven1 = _mm256_slli_epi32(_mm256_castps_si256(vn1), 21);
58 const __m256i vl1 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn1)));
59 vn1 = _mm256_sub_ps(vn1, vmagic_bias);
60
61 __m256 vs0 = _mm256_castsi256_ps(_mm256_add_epi32(vl0, ven0));
62 __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
63 __m256 vs1 = _mm256_castsi256_ps(_mm256_add_epi32(vl1, ven1));
64 __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
65
66 __m256 vp0 = _mm256_fmadd_ps(vc4, vt0, vc3);
67 __m256 vp1 = _mm256_fmadd_ps(vc4, vt1, vc3);
68
69 vp0 = _mm256_fmadd_ps(vp0, vt0, vc2);
70 vp1 = _mm256_fmadd_ps(vp1, vt1, vc2);
71
72 vp0 = _mm256_mul_ps(vp0, vt0);
73 vt0 = _mm256_mul_ps(vt0, vs0);
74 vp1 = _mm256_mul_ps(vp1, vt1);
75 vt1 = _mm256_mul_ps(vt1, vs1);
76
77 vs0 = _mm256_fmsub_ps(vs0, valpha, valpha);
78 vp0 = _mm256_fmadd_ps(vp0, vt0, vt0);
79 vs1 = _mm256_fmsub_ps(vs1, valpha, valpha);
80 vp1 = _mm256_fmadd_ps(vp1, vt1, vt1);
81
82 const __m256 ve0 = _mm256_fmadd_ps(vp0, valpha, vs0);
83 vx0 = _mm256_mul_ps(vx0, vbeta);
84 const __m256 ve1 = _mm256_fmadd_ps(vp1, valpha, vs1);
85 vx1 = _mm256_mul_ps(vx1, vbeta);
86
87 const __m256 vy0 = _mm256_blendv_ps(vx0, ve0, vx0);
88 const __m256 vy1 = _mm256_blendv_ps(vx1, ve1, vx1);
89
90 _mm256_storeu_ps(y, vy0);
91 _mm256_storeu_ps(y + 8, vy1);
92 y += 16;
93 }
94 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
95 __m256 vx = _mm256_loadu_ps(x);
96 x += 8;
97
98 const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
99
100 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
101 const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 21);
102 const __m256i vl = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn)));
103 __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
104 vn = _mm256_sub_ps(vn, vmagic_bias);
105
106 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
107
108 __m256 vp = _mm256_fmadd_ps(vc4, vt, vc3);
109 vp = _mm256_fmadd_ps(vp, vt, vc2);
110 vp = _mm256_mul_ps(vp, vt);
111
112 vt = _mm256_mul_ps(vt, vs);
113 vs = _mm256_fmsub_ps(vs, valpha, valpha);
114 vp = _mm256_fmadd_ps(vp, vt, vt);
115 const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
116
117 vx = _mm256_mul_ps(vx, vbeta);
118 const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
119
120 _mm256_storeu_ps(y, vy);
121 y += 8;
122 }
123 if XNN_UNLIKELY(n != 0) {
124 assert(n >= 1 * sizeof(float));
125 assert(n <= 7 * sizeof(float));
126 __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n));
127
128 __m256 vx = _mm256_maskload_ps(x, vmask);
129
130 const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
131
132 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
133 const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 21);
134 const __m256i vl = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn)));
135 __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
136 vn = _mm256_sub_ps(vn, vmagic_bias);
137
138 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
139
140 __m256 vp = _mm256_fmadd_ps(vc4, vt, vc3);
141 vp = _mm256_fmadd_ps(vp, vt, vc2);
142 vp = _mm256_mul_ps(vp, vt);
143
144 vt = _mm256_mul_ps(vt, vs);
145 vs = _mm256_fmsub_ps(vs, valpha, valpha);
146 vp = _mm256_fmadd_ps(vp, vt, vt);
147 const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
148
149 vx = _mm256_mul_ps(vx, vbeta);
150 const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
151
152 // _mm256_maskstore_ps(y, vmask, vf) could be used here, but triggers msan failures (probably an msan bug).
153 __m128 vy_lo = _mm256_castps256_ps128(vy);
154 if (n & (4 * sizeof(float))) {
155 _mm_storeu_ps(y, vy_lo);
156 vy_lo = _mm256_extractf128_ps(vy, 1);
157 y += 4;
158 }
159 if (n & (2 * sizeof(float))) {
160 _mm_storel_pi((__m64*) y, vy_lo);
161 vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
162 y += 2;
163 }
164 if (n & (1 * sizeof(float))) {
165 _mm_store_ss(y, vy_lo);
166 }
167 }
168 }
169