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1 // Auto-generated file. Do not edit!
2 //   Template: src/f32-velu/avx2-rr1-p6.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_p6_x24(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_p6_x24(
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(0x1.8000FEp23f);
34   const __m256 vlog2e = _mm256_set1_ps(0x1.715476p+0f);
35   const __m256 vminus_ln2 = _mm256_set1_ps(-0x1.62E43p-1f);
36   const __m256 vc6 = _mm256_set1_ps(0x1.6b7338p-10f);
37   const __m256 vc5 = _mm256_set1_ps(0x1.12278Ep-7f);
38   const __m256 vc4 = _mm256_set1_ps(0x1.555716p-5f);
39   const __m256 vc3 = _mm256_set1_ps(0x1.5554B0p-3f);
40   const __m256 vc2 = _mm256_set1_ps(0x1.FFFFFEp-2f);
41 
42   for (; n >= 24 * sizeof(float); n -= 24 * 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     x += 24;
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     const __m256 vz2 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx2, vprescale));
51 
52     __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
53     __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
54     __m256 vn2 = _mm256_fmadd_ps(vz2, vlog2e, vmagic_bias);
55 
56     __m256 vs0 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn0), 23));
57     vn0 = _mm256_sub_ps(vn0, vmagic_bias);
58     __m256 vs1 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn1), 23));
59     vn1 = _mm256_sub_ps(vn1, vmagic_bias);
60     __m256 vs2 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn2), 23));
61     vn2 = _mm256_sub_ps(vn2, vmagic_bias);
62 
63     __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
64     __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
65     __m256 vt2 = _mm256_fmadd_ps(vn2, vminus_ln2, vz2);
66 
67     __m256 vp0 = _mm256_fmadd_ps(vc6, vt0, vc5);
68     __m256 vp1 = _mm256_fmadd_ps(vc6, vt1, vc5);
69     __m256 vp2 = _mm256_fmadd_ps(vc6, vt2, vc5);
70 
71     vp0 = _mm256_fmadd_ps(vp0, vt0, vc4);
72     vp1 = _mm256_fmadd_ps(vp1, vt1, vc4);
73     vp2 = _mm256_fmadd_ps(vp2, vt2, vc4);
74 
75     vp0 = _mm256_fmadd_ps(vp0, vt0, vc3);
76     vp1 = _mm256_fmadd_ps(vp1, vt1, vc3);
77     vp2 = _mm256_fmadd_ps(vp2, vt2, vc3);
78 
79     vp0 = _mm256_fmadd_ps(vp0, vt0, vc2);
80     vp1 = _mm256_fmadd_ps(vp1, vt1, vc2);
81     vp2 = _mm256_fmadd_ps(vp2, vt2, vc2);
82 
83     vp0 = _mm256_mul_ps(vp0, vt0);
84     vt0 = _mm256_mul_ps(vt0, vs0);
85     vp1 = _mm256_mul_ps(vp1, vt1);
86     vt1 = _mm256_mul_ps(vt1, vs1);
87     vp2 = _mm256_mul_ps(vp2, vt2);
88     vt2 = _mm256_mul_ps(vt2, vs2);
89 
90     vs0 = _mm256_fmsub_ps(vs0, valpha, valpha);
91     vp0 = _mm256_fmadd_ps(vp0, vt0, vt0);
92     vs1 = _mm256_fmsub_ps(vs1, valpha, valpha);
93     vp1 = _mm256_fmadd_ps(vp1, vt1, vt1);
94     vs2 = _mm256_fmsub_ps(vs2, valpha, valpha);
95     vp2 = _mm256_fmadd_ps(vp2, vt2, vt2);
96 
97     const __m256 ve0 = _mm256_fmadd_ps(vp0, valpha, vs0);
98     vx0 = _mm256_mul_ps(vx0, vbeta);
99     const __m256 ve1 = _mm256_fmadd_ps(vp1, valpha, vs1);
100     vx1 = _mm256_mul_ps(vx1, vbeta);
101     const __m256 ve2 = _mm256_fmadd_ps(vp2, valpha, vs2);
102     vx2 = _mm256_mul_ps(vx2, vbeta);
103 
104     const __m256 vy0 = _mm256_blendv_ps(vx0, ve0, vx0);
105     const __m256 vy1 = _mm256_blendv_ps(vx1, ve1, vx1);
106     const __m256 vy2 = _mm256_blendv_ps(vx2, ve2, vx2);
107 
108     _mm256_storeu_ps(y, vy0);
109     _mm256_storeu_ps(y + 8, vy1);
110     _mm256_storeu_ps(y + 16, vy2);
111     y += 24;
112   }
113   for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
114     __m256 vx = _mm256_loadu_ps(x);
115     x += 8;
116 
117     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
118 
119     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
120     __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
121     vn = _mm256_sub_ps(vn, vmagic_bias);
122 
123     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
124 
125     __m256 vp = _mm256_fmadd_ps(vc6, vt, vc5);
126     vp = _mm256_fmadd_ps(vp, vt, vc4);
127     vp = _mm256_fmadd_ps(vp, vt, vc3);
128     vp = _mm256_fmadd_ps(vp, vt, vc2);
129     vp = _mm256_mul_ps(vp, vt);
130 
131     vt = _mm256_mul_ps(vt, vs);
132     vs = _mm256_fmsub_ps(vs, valpha, valpha);
133     vp = _mm256_fmadd_ps(vp, vt, vt);
134     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
135 
136     vx = _mm256_mul_ps(vx, vbeta);
137     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
138 
139     _mm256_storeu_ps(y, vy);
140     y += 8;
141   }
142   if XNN_UNLIKELY(n != 0) {
143     assert(n >= 1 * sizeof(float));
144     assert(n <= 7 * sizeof(float));
145     __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n));
146 
147     __m256 vx = _mm256_maskload_ps(x, vmask);
148 
149     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
150 
151     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
152     __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
153     vn = _mm256_sub_ps(vn, vmagic_bias);
154 
155     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
156 
157     __m256 vp = _mm256_fmadd_ps(vc6, vt, vc5);
158     vp = _mm256_fmadd_ps(vp, vt, vc4);
159     vp = _mm256_fmadd_ps(vp, vt, vc3);
160     vp = _mm256_fmadd_ps(vp, vt, vc2);
161     vp = _mm256_mul_ps(vp, vt);
162 
163     vt = _mm256_mul_ps(vt, vs);
164     vs = _mm256_fmsub_ps(vs, valpha, valpha);
165     vp = _mm256_fmadd_ps(vp, vt, vt);
166     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
167 
168     vx = _mm256_mul_ps(vx, vbeta);
169     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
170 
171     // _mm256_maskstore_ps(y, vmask, vf) could be used here, but triggers msan failures (probably an msan bug).
172     __m128 vy_lo = _mm256_castps256_ps128(vy);
173     if (n & (4 * sizeof(float))) {
174       _mm_storeu_ps(y, vy_lo);
175       vy_lo = _mm256_extractf128_ps(vy, 1);
176       y += 4;
177     }
178     if (n & (2 * sizeof(float))) {
179       _mm_storel_pi((__m64*) y, vy_lo);
180       vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
181       y += 2;
182     }
183     if (n & (1 * sizeof(float))) {
184       _mm_store_ss(y, vy_lo);
185     }
186   }
187 }
188