1 // Auto-generated file. Do not edit!
2 //   Template: src/f32-vsigmoid/avx512f-rr2-lut32-p2-perm2-scalef.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/intrinsics-polyfill.h>
16 #include <xnnpack/vunary.h>
17 
18 
xnn_f32_vsigmoid_ukernel__avx512f_rr2_lut32_p2_perm2_scalef_div_x64(size_t n,const float * x,float * y,const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS (1)])19 void xnn_f32_vsigmoid_ukernel__avx512f_rr2_lut32_p2_perm2_scalef_div_x64(
20     size_t n,
21     const float* x,
22     float* y,
23     const union xnn_f32_sigmoid_params params[restrict XNN_MIN_ELEMENTS(1)])
24 {
25   assert(n % sizeof(float) == 0);
26 
27   const __m512i vsign_mask = _mm512_set1_epi32((int) params->avx512_rr2_lut32_p2.sign_mask);
28   const __m512 vmagic_bias = _mm512_set1_ps(params->avx512_rr2_lut32_p2.magic_bias);
29   const __m512 vlog2e = _mm512_set1_ps(params->avx512_rr2_lut32_p2.log2e);
30   const __m512 vtable_lo = _mm512_load_ps(params->avx512_rr2_lut32_p2.table_lo);
31   const __m512 vtable_hi = _mm512_load_ps(params->avx512_rr2_lut32_p2.table_hi);
32   const __m512 vminus_ln2_hi = _mm512_set1_ps(params->avx512_rr2_lut32_p2.minus_ln2_hi);
33   const __m512 vminus_ln2_lo = _mm512_set1_ps(params->avx512_rr2_lut32_p2.minus_ln2_lo);
34   const __m512 vc2 = _mm512_set1_ps(params->avx512_rr2_lut32_p2.c2);
35   const __m512 vc1 = _mm512_set1_ps(params->avx512_rr2_lut32_p2.c1);
36   const __m512 vone = _mm512_set1_ps(params->avx512_rr2_lut32_p2.one);
37 
38   for (; n >= 64 * sizeof(float); n -= 64 * sizeof(float)) {
39     const __m512 vx0 = _mm512_loadu_ps(x);
40     const __m512 vx1 = _mm512_loadu_ps(x + 16);
41     const __m512 vx2 = _mm512_loadu_ps(x + 32);
42     const __m512 vx3 = _mm512_loadu_ps(x + 48);
43     x += 64;
44 
45     const __m512 vz0 = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx0), vsign_mask));
46     const __m512 vz1 = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx1), vsign_mask));
47     const __m512 vz2 = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx2), vsign_mask));
48     const __m512 vz3 = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx3), vsign_mask));
49 
50     __m512 vn0 = _mm512_fmadd_ps(vz0, vlog2e, vmagic_bias);
51     __m512 vn1 = _mm512_fmadd_ps(vz1, vlog2e, vmagic_bias);
52     __m512 vn2 = _mm512_fmadd_ps(vz2, vlog2e, vmagic_bias);
53     __m512 vn3 = _mm512_fmadd_ps(vz3, vlog2e, vmagic_bias);
54 
55     const __m512 vl0 = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn0), vtable_hi);
56     const __m512 vl1 = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn1), vtable_hi);
57     const __m512 vl2 = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn2), vtable_hi);
58     const __m512 vl3 = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn3), vtable_hi);
59 
60     vn0 = _mm512_sub_ps(vn0, vmagic_bias);
61     vn1 = _mm512_sub_ps(vn1, vmagic_bias);
62     vn2 = _mm512_sub_ps(vn2, vmagic_bias);
63     vn3 = _mm512_sub_ps(vn3, vmagic_bias);
64 
65     __m512 vt0 = _mm512_fmadd_ps(vn0, vminus_ln2_hi, vz0);
66     __m512 vt1 = _mm512_fmadd_ps(vn1, vminus_ln2_hi, vz1);
67     __m512 vt2 = _mm512_fmadd_ps(vn2, vminus_ln2_hi, vz2);
68     __m512 vt3 = _mm512_fmadd_ps(vn3, vminus_ln2_hi, vz3);
69 
70     vt0 = _mm512_fmadd_ps(vn0, vminus_ln2_lo, vt0);
71     vt1 = _mm512_fmadd_ps(vn1, vminus_ln2_lo, vt1);
72     vt2 = _mm512_fmadd_ps(vn2, vminus_ln2_lo, vt2);
73     vt3 = _mm512_fmadd_ps(vn3, vminus_ln2_lo, vt3);
74 
75     __m512 vp0 = _mm512_fmadd_ps(vt0, vc2, vc1);
76     __m512 vp1 = _mm512_fmadd_ps(vt1, vc2, vc1);
77     __m512 vp2 = _mm512_fmadd_ps(vt2, vc2, vc1);
78     __m512 vp3 = _mm512_fmadd_ps(vt3, vc2, vc1);
79 
80     vt0 = _mm512_mul_ps(vt0, vl0);
81     vt1 = _mm512_mul_ps(vt1, vl1);
82     vt2 = _mm512_mul_ps(vt2, vl2);
83     vt3 = _mm512_mul_ps(vt3, vl3);
84 
85     vp0 = _mm512_fmadd_ps(vt0, vp0, vl0);
86     vp1 = _mm512_fmadd_ps(vt1, vp1, vl1);
87     vp2 = _mm512_fmadd_ps(vt2, vp2, vl2);
88     vp3 = _mm512_fmadd_ps(vt3, vp3, vl3);
89 
90     const __m512 ve0 = _mm512_scalef_ps(vp0, vn0);
91     const __m512 ve1 = _mm512_scalef_ps(vp1, vn1);
92     const __m512 ve2 = _mm512_scalef_ps(vp2, vn2);
93     const __m512 ve3 = _mm512_scalef_ps(vp3, vn3);
94 
95     const __m512 vd0 = _mm512_add_ps(ve0, vone);
96     const __m512 vd1 = _mm512_add_ps(ve1, vone);
97     const __m512 vd2 = _mm512_add_ps(ve2, vone);
98     const __m512 vd3 = _mm512_add_ps(ve3, vone);
99 
100     __m512 vf0 = _mm512_div_ps(ve0, vd0);
101     __m512 vf1 = _mm512_div_ps(ve1, vd1);
102     __m512 vf2 = _mm512_div_ps(ve2, vd2);
103     __m512 vf3 = _mm512_div_ps(ve3, vd3);
104 
105     vf0 = _mm512_mask_sub_ps(vf0, _mm512_testn_epi32_mask(_mm512_castps_si512(vx0), vsign_mask), vone, vf0);
106     vf1 = _mm512_mask_sub_ps(vf1, _mm512_testn_epi32_mask(_mm512_castps_si512(vx1), vsign_mask), vone, vf1);
107     vf2 = _mm512_mask_sub_ps(vf2, _mm512_testn_epi32_mask(_mm512_castps_si512(vx2), vsign_mask), vone, vf2);
108     vf3 = _mm512_mask_sub_ps(vf3, _mm512_testn_epi32_mask(_mm512_castps_si512(vx3), vsign_mask), vone, vf3);
109 
110     _mm512_storeu_ps(y, vf0);
111     _mm512_storeu_ps(y + 16, vf1);
112     _mm512_storeu_ps(y + 32, vf2);
113     _mm512_storeu_ps(y + 48, vf3);
114     y += 64;
115   }
116   for (; n >= 16 * sizeof(float); n -= 16 * sizeof(float)) {
117     const __m512 vx = _mm512_loadu_ps(x);
118     x += 16;
119 
120     const __m512 vz = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx), vsign_mask));
121 
122     __m512 vn = _mm512_fmadd_ps(vz, vlog2e, vmagic_bias);
123     const __m512 vl = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn), vtable_hi);
124     vn = _mm512_sub_ps(vn, vmagic_bias);
125 
126     __m512 vt = _mm512_fmadd_ps(vn, vminus_ln2_hi, vz);
127     vt = _mm512_fmadd_ps(vn, vminus_ln2_lo, vt);
128 
129     __m512 vp = _mm512_fmadd_ps(vt, vc2, vc1);
130     vt = _mm512_mul_ps(vt, vl);
131     vp = _mm512_fmadd_ps(vt, vp, vl);
132 
133     const __m512 ve = _mm512_scalef_ps(vp, vn);
134     const __m512 vd = _mm512_add_ps(ve, vone);
135 
136     __m512 vf = _mm512_div_ps(ve, vd);
137 
138     vf = _mm512_mask_sub_ps(vf, _mm512_testn_epi32_mask(_mm512_castps_si512(vx), vsign_mask), vone, vf);
139 
140     _mm512_storeu_ps(y, vf);
141     y += 16;
142   }
143   if XNN_UNLIKELY(n != 0) {
144     assert(n >= 1 * sizeof(float));
145     assert(n <= 15 * sizeof(float));
146 
147     // Prepare mask for valid 32-bit elements (depends on n).
148     n >>= 2 /* log2(sizeof(float)) */;
149     const __mmask16 vmask = _cvtu32_mask16((uint16_t) ((uint32_t) (UINT32_C(1) << n) - UINT32_C(1)));
150 
151     const __m512 vx = _mm512_maskz_loadu_ps(vmask, x);
152     const __m512 vz = _mm512_castsi512_ps(_mm512_or_epi32(_mm512_castps_si512(vx), vsign_mask));
153 
154     __m512 vn = _mm512_fmadd_ps(vz, vlog2e, vmagic_bias);
155     const __m512 vl = _mm512_permutex2var_ps(vtable_lo, _mm512_castps_si512(vn), vtable_hi);
156     vn = _mm512_sub_ps(vn, vmagic_bias);
157 
158     __m512 vt = _mm512_fmadd_ps(vn, vminus_ln2_hi, vz);
159     vt = _mm512_fmadd_ps(vn, vminus_ln2_lo, vt);
160 
161     __m512 vp = _mm512_fmadd_ps(vt, vc2, vc1);
162     vt = _mm512_mul_ps(vt, vl);
163     vp = _mm512_fmadd_ps(vt, vp, vl);
164 
165     const __m512 ve = _mm512_scalef_ps(vp, vn);
166     const __m512 vd = _mm512_add_ps(ve, vone);
167 
168     __m512 vf = _mm512_div_ps(ve, vd);
169 
170     vf = _mm512_mask_sub_ps(vf, _mm512_testn_epi32_mask(_mm512_castps_si512(vx), vsign_mask), vone, vf);
171 
172     _mm512_mask_storeu_ps(y, vmask, vf);
173   }
174 }
175