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_x40(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_x40(
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 >= 40 * sizeof(float); n -= 40 * sizeof(float)) {
44     __m256 vx0 = _mm256_loadu_ps(x);
45     __m256 vx1 = _mm256_loadu_ps(x + 8);
46     __m256 vx2 = _mm256_loadu_ps(x + 16);
47     __m256 vx3 = _mm256_loadu_ps(x + 24);
48     __m256 vx4 = _mm256_loadu_ps(x + 32);
49     x += 40;
50 
51     const __m256 vz0 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx0, vprescale));
52     const __m256 vz1 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx1, vprescale));
53     const __m256 vz2 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx2, vprescale));
54     const __m256 vz3 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx3, vprescale));
55     const __m256 vz4 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx4, vprescale));
56 
57     __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
58     __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
59     __m256 vn2 = _mm256_fmadd_ps(vz2, vlog2e, vmagic_bias);
60     __m256 vn3 = _mm256_fmadd_ps(vz3, vlog2e, vmagic_bias);
61     __m256 vn4 = _mm256_fmadd_ps(vz4, vlog2e, vmagic_bias);
62 
63     const __m256i ven0 = _mm256_slli_epi32(_mm256_castps_si256(vn0), 21);
64     const __m256i vl0 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn0)));
65     vn0 = _mm256_sub_ps(vn0, vmagic_bias);
66     const __m256i ven1 = _mm256_slli_epi32(_mm256_castps_si256(vn1), 21);
67     const __m256i vl1 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn1)));
68     vn1 = _mm256_sub_ps(vn1, vmagic_bias);
69     const __m256i ven2 = _mm256_slli_epi32(_mm256_castps_si256(vn2), 21);
70     const __m256i vl2 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn2)));
71     vn2 = _mm256_sub_ps(vn2, vmagic_bias);
72     const __m256i ven3 = _mm256_slli_epi32(_mm256_castps_si256(vn3), 21);
73     const __m256i vl3 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn3)));
74     vn3 = _mm256_sub_ps(vn3, vmagic_bias);
75     const __m256i ven4 = _mm256_slli_epi32(_mm256_castps_si256(vn4), 21);
76     const __m256i vl4 = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn4)));
77     vn4 = _mm256_sub_ps(vn4, vmagic_bias);
78 
79     __m256 vs0 = _mm256_castsi256_ps(_mm256_add_epi32(vl0, ven0));
80     __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
81     __m256 vs1 = _mm256_castsi256_ps(_mm256_add_epi32(vl1, ven1));
82     __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
83     __m256 vs2 = _mm256_castsi256_ps(_mm256_add_epi32(vl2, ven2));
84     __m256 vt2 = _mm256_fmadd_ps(vn2, vminus_ln2, vz2);
85     __m256 vs3 = _mm256_castsi256_ps(_mm256_add_epi32(vl3, ven3));
86     __m256 vt3 = _mm256_fmadd_ps(vn3, vminus_ln2, vz3);
87     __m256 vs4 = _mm256_castsi256_ps(_mm256_add_epi32(vl4, ven4));
88     __m256 vt4 = _mm256_fmadd_ps(vn4, vminus_ln2, vz4);
89 
90     __m256 vp0 = _mm256_fmadd_ps(vc4, vt0, vc3);
91     __m256 vp1 = _mm256_fmadd_ps(vc4, vt1, vc3);
92     __m256 vp2 = _mm256_fmadd_ps(vc4, vt2, vc3);
93     __m256 vp3 = _mm256_fmadd_ps(vc4, vt3, vc3);
94     __m256 vp4 = _mm256_fmadd_ps(vc4, vt4, vc3);
95 
96     vp0 = _mm256_fmadd_ps(vp0, vt0, vc2);
97     vp1 = _mm256_fmadd_ps(vp1, vt1, vc2);
98     vp2 = _mm256_fmadd_ps(vp2, vt2, vc2);
99     vp3 = _mm256_fmadd_ps(vp3, vt3, vc2);
100     vp4 = _mm256_fmadd_ps(vp4, vt4, vc2);
101 
102     vp0 = _mm256_mul_ps(vp0, vt0);
103     vt0 = _mm256_mul_ps(vt0, vs0);
104     vp1 = _mm256_mul_ps(vp1, vt1);
105     vt1 = _mm256_mul_ps(vt1, vs1);
106     vp2 = _mm256_mul_ps(vp2, vt2);
107     vt2 = _mm256_mul_ps(vt2, vs2);
108     vp3 = _mm256_mul_ps(vp3, vt3);
109     vt3 = _mm256_mul_ps(vt3, vs3);
110     vp4 = _mm256_mul_ps(vp4, vt4);
111     vt4 = _mm256_mul_ps(vt4, vs4);
112 
113     vs0 = _mm256_fmsub_ps(vs0, valpha, valpha);
114     vp0 = _mm256_fmadd_ps(vp0, vt0, vt0);
115     vs1 = _mm256_fmsub_ps(vs1, valpha, valpha);
116     vp1 = _mm256_fmadd_ps(vp1, vt1, vt1);
117     vs2 = _mm256_fmsub_ps(vs2, valpha, valpha);
118     vp2 = _mm256_fmadd_ps(vp2, vt2, vt2);
119     vs3 = _mm256_fmsub_ps(vs3, valpha, valpha);
120     vp3 = _mm256_fmadd_ps(vp3, vt3, vt3);
121     vs4 = _mm256_fmsub_ps(vs4, valpha, valpha);
122     vp4 = _mm256_fmadd_ps(vp4, vt4, vt4);
123 
124     const __m256 ve0 = _mm256_fmadd_ps(vp0, valpha, vs0);
125     vx0 = _mm256_mul_ps(vx0, vbeta);
126     const __m256 ve1 = _mm256_fmadd_ps(vp1, valpha, vs1);
127     vx1 = _mm256_mul_ps(vx1, vbeta);
128     const __m256 ve2 = _mm256_fmadd_ps(vp2, valpha, vs2);
129     vx2 = _mm256_mul_ps(vx2, vbeta);
130     const __m256 ve3 = _mm256_fmadd_ps(vp3, valpha, vs3);
131     vx3 = _mm256_mul_ps(vx3, vbeta);
132     const __m256 ve4 = _mm256_fmadd_ps(vp4, valpha, vs4);
133     vx4 = _mm256_mul_ps(vx4, vbeta);
134 
135     const __m256 vy0 = _mm256_blendv_ps(vx0, ve0, vx0);
136     const __m256 vy1 = _mm256_blendv_ps(vx1, ve1, vx1);
137     const __m256 vy2 = _mm256_blendv_ps(vx2, ve2, vx2);
138     const __m256 vy3 = _mm256_blendv_ps(vx3, ve3, vx3);
139     const __m256 vy4 = _mm256_blendv_ps(vx4, ve4, vx4);
140 
141     _mm256_storeu_ps(y, vy0);
142     _mm256_storeu_ps(y + 8, vy1);
143     _mm256_storeu_ps(y + 16, vy2);
144     _mm256_storeu_ps(y + 24, vy3);
145     _mm256_storeu_ps(y + 32, vy4);
146     y += 40;
147   }
148   for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
149     __m256 vx = _mm256_loadu_ps(x);
150     x += 8;
151 
152     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
153 
154     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
155     const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 21);
156     const __m256i vl = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn)));
157     __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
158     vn = _mm256_sub_ps(vn, vmagic_bias);
159 
160     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
161 
162     __m256 vp = _mm256_fmadd_ps(vc4, vt, vc3);
163     vp = _mm256_fmadd_ps(vp, vt, vc2);
164     vp = _mm256_mul_ps(vp, vt);
165 
166     vt = _mm256_mul_ps(vt, vs);
167     vs = _mm256_fmsub_ps(vs, valpha, valpha);
168     vp = _mm256_fmadd_ps(vp, vt, vt);
169     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
170 
171     vx = _mm256_mul_ps(vx, vbeta);
172     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
173 
174     _mm256_storeu_ps(y, vy);
175     y += 8;
176   }
177   if XNN_UNLIKELY(n != 0) {
178     assert(n >= 1 * sizeof(float));
179     assert(n <= 7 * sizeof(float));
180     __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n));
181 
182     __m256 vx = _mm256_maskload_ps(x, vmask);
183 
184     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
185 
186     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
187     const __m256i ven = _mm256_slli_epi32(_mm256_castps_si256(vn), 21);
188     const __m256i vl = _mm256_castps_si256(_mm256_permutevar_ps(vtable, _mm256_castps_si256(vn)));
189     __m256 vs = _mm256_castsi256_ps(_mm256_add_epi32(vl, ven));
190     vn = _mm256_sub_ps(vn, vmagic_bias);
191 
192     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
193 
194     __m256 vp = _mm256_fmadd_ps(vc4, vt, vc3);
195     vp = _mm256_fmadd_ps(vp, vt, vc2);
196     vp = _mm256_mul_ps(vp, vt);
197 
198     vt = _mm256_mul_ps(vt, vs);
199     vs = _mm256_fmsub_ps(vs, valpha, valpha);
200     vp = _mm256_fmadd_ps(vp, vt, vt);
201     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
202 
203     vx = _mm256_mul_ps(vx, vbeta);
204     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
205 
206     // _mm256_maskstore_ps(y, vmask, vf) could be used here, but triggers msan failures (probably an msan bug).
207     __m128 vy_lo = _mm256_castps256_ps128(vy);
208     if (n & (4 * sizeof(float))) {
209       _mm_storeu_ps(y, vy_lo);
210       vy_lo = _mm256_extractf128_ps(vy, 1);
211       y += 4;
212     }
213     if (n & (2 * sizeof(float))) {
214       _mm_storel_pi((__m64*) y, vy_lo);
215       vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
216       y += 2;
217     }
218     if (n & (1 * sizeof(float))) {
219       _mm_store_ss(y, vy_lo);
220     }
221   }
222 }
223