1 // Auto-generated file. Do not edit!
2 // Template: src/f32-velu/avx2-rr1-lut16-p3-gather.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 extern XNN_INTERNAL const int xnn_table_exp2minus_k_over_16[16];
19
20 static const int32_t mask_table[14] = {-1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0};
21
xnn_f32_velu_ukernel__avx2_rr1_lut16_p3_gather_x32(size_t n,const float * x,float * y,const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS (1)])22 void xnn_f32_velu_ukernel__avx2_rr1_lut16_p3_gather_x32(
23 size_t n,
24 const float* x,
25 float* y,
26 const union xnn_f32_elu_params params[restrict XNN_MIN_ELEMENTS(1)])
27 {
28 assert(n % sizeof(float) == 0);
29
30 const __m256 vprescale = _mm256_broadcast_ps((const __m128*) params->sse.prescale);
31 const __m256 valpha = _mm256_broadcast_ps((const __m128*) params->sse.alpha);
32 const __m256 vbeta = _mm256_broadcast_ps((const __m128*) params->sse.beta);
33
34 const __m256 vsat_cutoff = _mm256_set1_ps(-0x1.154246p+4f);
35 const __m256 vmagic_bias = _mm256_set1_ps(0x1.800000p19f);
36 const __m256 vlog2e = _mm256_set1_ps(0x1.715476p+0f);
37 const __m256i vindex_mask = _mm256_set1_epi32(0xF);
38 const __m256 vminus_ln2 = _mm256_set1_ps(-0x1.62E43p-1f);
39 const __m256 vc3 = _mm256_set1_ps(0x1.55561Cp-3f);
40 const __m256 vc2 = _mm256_set1_ps(0x1.0001ECp-1f);
41
42 for (; n >= 32 * sizeof(float); n -= 32 * sizeof(float)) {
43 __m256 vx0 = _mm256_loadu_ps(x);
44 __m256 vx1 = _mm256_loadu_ps(x + 8);
45 __m256 vx2 = _mm256_loadu_ps(x + 16);
46 __m256 vx3 = _mm256_loadu_ps(x + 24);
47 x += 32;
48
49 const __m256 vz0 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx0, vprescale));
50 const __m256 vz1 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx1, vprescale));
51 const __m256 vz2 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx2, vprescale));
52 const __m256 vz3 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx3, vprescale));
53
54 __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
55 __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
56 __m256 vn2 = _mm256_fmadd_ps(vz2, vlog2e, vmagic_bias);
57 __m256 vn3 = _mm256_fmadd_ps(vz3, vlog2e, vmagic_bias);
58
59 const __m256i vidx0 = _mm256_and_si256(_mm256_castps_si256(vn0), vindex_mask);
60 const __m256i vl0 = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx0, sizeof(float));
61 const __m256i vidx1 = _mm256_and_si256(_mm256_castps_si256(vn1), vindex_mask);
62 const __m256i vl1 = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx1, sizeof(float));
63 const __m256i vidx2 = _mm256_and_si256(_mm256_castps_si256(vn2), vindex_mask);
64 const __m256i vl2 = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx2, sizeof(float));
65 const __m256i vidx3 = _mm256_and_si256(_mm256_castps_si256(vn3), vindex_mask);
66 const __m256i vl3 = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx3, sizeof(float));
67
68 const __m256i ven0 = _mm256_slli_epi32(_mm256_castps_si256(vn0), 19);
69 vn0 = _mm256_sub_ps(vn0, vmagic_bias);
70 const __m256i ven1 = _mm256_slli_epi32(_mm256_castps_si256(vn1), 19);
71 vn1 = _mm256_sub_ps(vn1, vmagic_bias);
72 const __m256i ven2 = _mm256_slli_epi32(_mm256_castps_si256(vn2), 19);
73 vn2 = _mm256_sub_ps(vn2, vmagic_bias);
74 const __m256i ven3 = _mm256_slli_epi32(_mm256_castps_si256(vn3), 19);
75 vn3 = _mm256_sub_ps(vn3, vmagic_bias);
76
77 __m256 vs0 = _mm256_castsi256_ps(_mm256_add_epi32(vl0, ven0));
78 __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
79 __m256 vs1 = _mm256_castsi256_ps(_mm256_add_epi32(vl1, ven1));
80 __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
81 __m256 vs2 = _mm256_castsi256_ps(_mm256_add_epi32(vl2, ven2));
82 __m256 vt2 = _mm256_fmadd_ps(vn2, vminus_ln2, vz2);
83 __m256 vs3 = _mm256_castsi256_ps(_mm256_add_epi32(vl3, ven3));
84 __m256 vt3 = _mm256_fmadd_ps(vn3, vminus_ln2, vz3);
85
86 __m256 vp0 = _mm256_fmadd_ps(vc3, vt0, vc2);
87 __m256 vp1 = _mm256_fmadd_ps(vc3, vt1, vc2);
88 __m256 vp2 = _mm256_fmadd_ps(vc3, vt2, vc2);
89 __m256 vp3 = _mm256_fmadd_ps(vc3, vt3, vc2);
90
91 vp0 = _mm256_mul_ps(vp0, vt0);
92 vt0 = _mm256_mul_ps(vt0, vs0);
93 vp1 = _mm256_mul_ps(vp1, vt1);
94 vt1 = _mm256_mul_ps(vt1, vs1);
95 vp2 = _mm256_mul_ps(vp2, vt2);
96 vt2 = _mm256_mul_ps(vt2, vs2);
97 vp3 = _mm256_mul_ps(vp3, vt3);
98 vt3 = _mm256_mul_ps(vt3, vs3);
99
100 vs0 = _mm256_fmsub_ps(vs0, valpha, valpha);
101 vp0 = _mm256_fmadd_ps(vp0, vt0, vt0);
102 vs1 = _mm256_fmsub_ps(vs1, valpha, valpha);
103 vp1 = _mm256_fmadd_ps(vp1, vt1, vt1);
104 vs2 = _mm256_fmsub_ps(vs2, valpha, valpha);
105 vp2 = _mm256_fmadd_ps(vp2, vt2, vt2);
106 vs3 = _mm256_fmsub_ps(vs3, valpha, valpha);
107 vp3 = _mm256_fmadd_ps(vp3, vt3, vt3);
108
109 const __m256 ve0 = _mm256_fmadd_ps(vp0, valpha, vs0);
110 vx0 = _mm256_mul_ps(vx0, vbeta);
111 const __m256 ve1 = _mm256_fmadd_ps(vp1, valpha, vs1);
112 vx1 = _mm256_mul_ps(vx1, vbeta);
113 const __m256 ve2 = _mm256_fmadd_ps(vp2, valpha, vs2);
114 vx2 = _mm256_mul_ps(vx2, vbeta);
115 const __m256 ve3 = _mm256_fmadd_ps(vp3, valpha, vs3);
116 vx3 = _mm256_mul_ps(vx3, vbeta);
117
118 const __m256 vy0 = _mm256_blendv_ps(vx0, ve0, vx0);
119 const __m256 vy1 = _mm256_blendv_ps(vx1, ve1, vx1);
120 const __m256 vy2 = _mm256_blendv_ps(vx2, ve2, vx2);
121 const __m256 vy3 = _mm256_blendv_ps(vx3, ve3, vx3);
122
123 _mm256_storeu_ps(y, vy0);
124 _mm256_storeu_ps(y + 8, vy1);
125 _mm256_storeu_ps(y + 16, vy2);
126 _mm256_storeu_ps(y + 24, vy3);
127 y += 32;
128 }
129 for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
130 __m256 vx = _mm256_loadu_ps(x);
131 x += 8;
132
133 const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
134
135 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
136 const __m256i vidx = _mm256_and_si256(_mm256_castps_si256(vn), vindex_mask);
137 const __m256i vl = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx, sizeof(float));
138
139 const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 19);
140 vn = _mm256_sub_ps(vn, vmagic_bias);
141
142 __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
143 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
144
145 __m256 vp = _mm256_fmadd_ps(vc3, vt, vc2);
146 vp = _mm256_mul_ps(vp, vt);
147
148 vt = _mm256_mul_ps(vt, vs);
149 vs = _mm256_fmsub_ps(vs, valpha, valpha);
150 vp = _mm256_fmadd_ps(vp, vt, vt);
151 const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
152
153 vx = _mm256_mul_ps(vx, vbeta);
154 const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
155
156 _mm256_storeu_ps(y, vy);
157 y += 8;
158 }
159 if XNN_UNLIKELY(n != 0) {
160 assert(n >= 1 * sizeof(float));
161 assert(n <= 7 * sizeof(float));
162 __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n));
163
164 __m256 vx = _mm256_maskload_ps(x, vmask);
165
166 const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
167
168 __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
169 const __m256i vidx = _mm256_and_si256(_mm256_castps_si256(vn), vindex_mask);
170 const __m256i vl = _mm256_i32gather_epi32(xnn_table_exp2minus_k_over_16, vidx, sizeof(float));
171
172 const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 19);
173 vn = _mm256_sub_ps(vn, vmagic_bias);
174
175 __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
176 __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
177
178 __m256 vp = _mm256_fmadd_ps(vc3, vt, vc2);
179 vp = _mm256_mul_ps(vp, vt);
180
181 vt = _mm256_mul_ps(vt, vs);
182 vs = _mm256_fmsub_ps(vs, valpha, valpha);
183 vp = _mm256_fmadd_ps(vp, vt, vt);
184 const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
185
186 vx = _mm256_mul_ps(vx, vbeta);
187 const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
188
189 // _mm256_maskstore_ps(y, vmask, vf) could be used here, but triggers msan failures (probably an msan bug).
190 __m128 vy_lo = _mm256_castps256_ps128(vy);
191 if (n & (4 * sizeof(float))) {
192 _mm_storeu_ps(y, vy_lo);
193 vy_lo = _mm256_extractf128_ps(vy, 1);
194 y += 4;
195 }
196 if (n & (2 * sizeof(float))) {
197 _mm_storel_pi((__m64*) y, vy_lo);
198 vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
199 y += 2;
200 }
201 if (n & (1 * sizeof(float))) {
202 _mm_store_ss(y, vy_lo);
203 }
204 }
205 }
206