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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_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_p6_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(0x1.8000FEp23f);
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 >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
43     __m256 vx0 = _mm256_loadu_ps(x);
44     __m256 vx1 = _mm256_loadu_ps(x + 8);
45     x += 16;
46 
47     const __m256 vz0 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx0, vprescale));
48     const __m256 vz1 = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx1, vprescale));
49 
50     __m256 vn0 = _mm256_fmadd_ps(vz0, vlog2e, vmagic_bias);
51     __m256 vn1 = _mm256_fmadd_ps(vz1, vlog2e, vmagic_bias);
52 
53     __m256 vs0 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn0), 23));
54     vn0 = _mm256_sub_ps(vn0, vmagic_bias);
55     __m256 vs1 = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn1), 23));
56     vn1 = _mm256_sub_ps(vn1, vmagic_bias);
57 
58     __m256 vt0 = _mm256_fmadd_ps(vn0, vminus_ln2, vz0);
59     __m256 vt1 = _mm256_fmadd_ps(vn1, vminus_ln2, vz1);
60 
61     __m256 vp0 = _mm256_fmadd_ps(vc6, vt0, vc5);
62     __m256 vp1 = _mm256_fmadd_ps(vc6, vt1, vc5);
63 
64     vp0 = _mm256_fmadd_ps(vp0, vt0, vc4);
65     vp1 = _mm256_fmadd_ps(vp1, vt1, vc4);
66 
67     vp0 = _mm256_fmadd_ps(vp0, vt0, vc3);
68     vp1 = _mm256_fmadd_ps(vp1, vt1, vc3);
69 
70     vp0 = _mm256_fmadd_ps(vp0, vt0, vc2);
71     vp1 = _mm256_fmadd_ps(vp1, vt1, vc2);
72 
73     vp0 = _mm256_mul_ps(vp0, vt0);
74     vt0 = _mm256_mul_ps(vt0, vs0);
75     vp1 = _mm256_mul_ps(vp1, vt1);
76     vt1 = _mm256_mul_ps(vt1, vs1);
77 
78     vs0 = _mm256_fmsub_ps(vs0, valpha, valpha);
79     vp0 = _mm256_fmadd_ps(vp0, vt0, vt0);
80     vs1 = _mm256_fmsub_ps(vs1, valpha, valpha);
81     vp1 = _mm256_fmadd_ps(vp1, vt1, vt1);
82 
83     const __m256 ve0 = _mm256_fmadd_ps(vp0, valpha, vs0);
84     vx0 = _mm256_mul_ps(vx0, vbeta);
85     const __m256 ve1 = _mm256_fmadd_ps(vp1, valpha, vs1);
86     vx1 = _mm256_mul_ps(vx1, vbeta);
87 
88     const __m256 vy0 = _mm256_blendv_ps(vx0, ve0, vx0);
89     const __m256 vy1 = _mm256_blendv_ps(vx1, ve1, vx1);
90 
91     _mm256_storeu_ps(y, vy0);
92     _mm256_storeu_ps(y + 8, vy1);
93     y += 16;
94   }
95   for (; n >= 8 * sizeof(float); n -= 8 * sizeof(float)) {
96     __m256 vx = _mm256_loadu_ps(x);
97     x += 8;
98 
99     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
100 
101     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
102     __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
103     vn = _mm256_sub_ps(vn, vmagic_bias);
104 
105     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
106 
107     __m256 vp = _mm256_fmadd_ps(vc6, vt, vc5);
108     vp = _mm256_fmadd_ps(vp, vt, vc4);
109     vp = _mm256_fmadd_ps(vp, vt, vc3);
110     vp = _mm256_fmadd_ps(vp, vt, vc2);
111     vp = _mm256_mul_ps(vp, vt);
112 
113     vt = _mm256_mul_ps(vt, vs);
114     vs = _mm256_fmsub_ps(vs, valpha, valpha);
115     vp = _mm256_fmadd_ps(vp, vt, vt);
116     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
117 
118     vx = _mm256_mul_ps(vx, vbeta);
119     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
120 
121     _mm256_storeu_ps(y, vy);
122     y += 8;
123   }
124   if XNN_UNLIKELY(n != 0) {
125     assert(n >= 1 * sizeof(float));
126     assert(n <= 7 * sizeof(float));
127     __m256i vmask = _mm256_loadu_si256((const __m256i*) ((uintptr_t) &mask_table[7] - n));
128 
129     __m256 vx = _mm256_maskload_ps(x, vmask);
130 
131     const __m256 vz = _mm256_max_ps(vsat_cutoff, _mm256_mul_ps(vx, vprescale));
132 
133     __m256 vn = _mm256_fmadd_ps(vz, vlog2e, vmagic_bias);
134     __m256 vs = _mm256_castsi256_ps(_mm256_slli_epi32(_mm256_castps_si256(vn), 23));
135     vn = _mm256_sub_ps(vn, vmagic_bias);
136 
137     __m256 vt = _mm256_fmadd_ps(vn, vminus_ln2, vz);
138 
139     __m256 vp = _mm256_fmadd_ps(vc6, vt, vc5);
140     vp = _mm256_fmadd_ps(vp, vt, vc4);
141     vp = _mm256_fmadd_ps(vp, vt, vc3);
142     vp = _mm256_fmadd_ps(vp, vt, vc2);
143     vp = _mm256_mul_ps(vp, vt);
144 
145     vt = _mm256_mul_ps(vt, vs);
146     vs = _mm256_fmsub_ps(vs, valpha, valpha);
147     vp = _mm256_fmadd_ps(vp, vt, vt);
148     const __m256 ve = _mm256_fmadd_ps(vp, valpha, vs);
149 
150     vx = _mm256_mul_ps(vx, vbeta);
151     const __m256 vy = _mm256_blendv_ps(vx, ve, vx);
152 
153     // _mm256_maskstore_ps(y, vmask, vf) could be used here, but triggers msan failures (probably an msan bug).
154     __m128 vy_lo = _mm256_castps256_ps128(vy);
155     if (n & (4 * sizeof(float))) {
156       _mm_storeu_ps(y, vy_lo);
157       vy_lo = _mm256_extractf128_ps(vy, 1);
158       y += 4;
159     }
160     if (n & (2 * sizeof(float))) {
161       _mm_storel_pi((__m64*) y, vy_lo);
162       vy_lo = _mm_movehl_ps(vy_lo, vy_lo);
163       y += 2;
164     }
165     if (n & (1 * sizeof(float))) {
166       _mm_store_ss(y, vy_lo);
167     }
168   }
169 }
170