1 // Auto-generated file. Do not edit!
2 // Template: src/f32-raddstoreexpminusmax/neon-lut64-p2.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 <arm_neon.h>
13
14 #include <xnnpack/common.h>
15 #include <xnnpack/raddstoreexpminusmax.h>
16
17
18 extern XNN_INTERNAL const float xnn_table_exp2_k_over_64[64];
19
xnn_f32_raddstoreexpminusmax_ukernel__neonfma_rr1_lut64_p2_x8_acc2(size_t elements,const float * input,const float * max,float * output,float * sum,const union xnn_f32_expminus_params params[restrict XNN_MIN_ELEMENTS (1)])20 void xnn_f32_raddstoreexpminusmax_ukernel__neonfma_rr1_lut64_p2_x8_acc2(
21 size_t elements,
22 const float* input,
23 const float* max,
24 float* output,
25 float* sum,
26 const union xnn_f32_expminus_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
27 {
28 assert(elements % sizeof(float) == 0);
29
30 const float32x4_t vi_max = vld1q_dup_f32(max);
31 const float32x4_t vlog2e = vld1q_dup_f32(¶ms->neonfma_rr1_lut64_p2.log2e);
32 const float32x4_t vmagic_bias = vld1q_dup_f32(¶ms->neonfma_rr1_lut64_p2.magic_bias);
33 const int32x4_t vindex_mask = vmovq_n_s32(INT32_C(0x3F));
34 const float32x4_t vminus_ln2 = vld1q_dup_f32(¶ms->neonfma_rr1_lut64_p2.minus_ln2);
35 const float32x4_t vc2 = vld1q_dup_f32(¶ms->neonfma_rr1_lut64_p2.c2);
36 const float32x4_t vdenorm_cutoff = vld1q_dup_f32(¶ms->neonfma_rr1_lut64_p2.denorm_cutoff);
37
38 float32x4_t vacc0 = vmovq_n_f32(0.0f);
39 float32x4_t vacc1 = vmovq_n_f32(0.0f);
40 for (; elements >= 8 * sizeof(float); elements -= 8 * sizeof(float)) {
41 const float32x4_t vi0123 = vld1q_f32(input); input += 4;
42 const float32x4_t vi4567 = vld1q_f32(input); input += 4;
43
44 const float32x4_t vx0123 = vsubq_f32(vi0123, vi_max);
45 const float32x4_t vx4567 = vsubq_f32(vi4567, vi_max);
46
47 float32x4_t vn0123 = vfmaq_f32(vmagic_bias, vx0123, vlog2e);
48 float32x4_t vn4567 = vfmaq_f32(vmagic_bias, vx4567, vlog2e);
49
50 const int32x4_t ve0123 = vshlq_n_s32(vbicq_s32(vreinterpretq_s32_f32(vn0123), vmovq_n_s32(INT32_C(0x3F))), 17);
51 const int32x4_t ve4567 = vshlq_n_s32(vbicq_s32(vreinterpretq_s32_f32(vn4567), vmovq_n_s32(INT32_C(0x3F))), 17);
52
53 const uint64x2_t vidx0123 = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn0123), vindex_mask));
54 const uint64_t vidx01 = vgetq_lane_u64(vidx0123, 0);
55 const uint64_t vidx23 = vgetq_lane_u64(vidx0123, 1);
56 const uint64x2_t vidx4567 = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn4567), vindex_mask));
57 const uint64_t vidx45 = vgetq_lane_u64(vidx4567, 0);
58 const uint64_t vidx67 = vgetq_lane_u64(vidx4567, 1);
59
60 float32x2_t vl01 = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx01]);
61 float32x2_t vl23 = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx23]);
62 float32x2_t vl45 = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx45]);
63 float32x2_t vl67 = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx67]);
64
65 vl01 = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx01 >> 32)], vl01, 1);
66 vl23 = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx23 >> 32)], vl23, 1);
67 const float32x4_t vl0123 = vcombine_f32(vl01, vl23);
68 vl45 = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx45 >> 32)], vl45, 1);
69 vl67 = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx67 >> 32)], vl67, 1);
70 const float32x4_t vl4567 = vcombine_f32(vl45, vl67);
71
72 const float32x4_t vs0123 = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl0123), ve0123));
73 const float32x4_t vs4567 = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl4567), ve4567));
74
75 vn0123 = vsubq_f32(vn0123, vmagic_bias);
76 vn4567 = vsubq_f32(vn4567, vmagic_bias);
77
78 float32x4_t vt0123 = vfmaq_f32(vx0123, vn0123, vminus_ln2);
79 float32x4_t vt4567 = vfmaq_f32(vx4567, vn4567, vminus_ln2);
80
81 float32x4_t vp0123 = vmulq_f32(vt0123, vc2);
82 float32x4_t vp4567 = vmulq_f32(vt4567, vc2);
83
84 vp0123 = vfmaq_f32(vt0123, vt0123, vp0123);
85 vp4567 = vfmaq_f32(vt4567, vt4567, vp4567);
86
87 float32x4_t vf0123 = vfmaq_f32(vs0123, vs0123, vp0123);
88 float32x4_t vf4567 = vfmaq_f32(vs4567, vs4567, vp4567);
89
90 vf0123 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf0123), vcltq_f32(vx0123, vdenorm_cutoff)));
91 vf4567 = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf4567), vcltq_f32(vx4567, vdenorm_cutoff)));
92
93 vst1q_f32(output, vf0123); output += 4;
94 vst1q_f32(output, vf4567); output += 4;
95
96 vacc0 = vaddq_f32(vacc0, vf0123);
97 vacc0 = vaddq_f32(vacc0, vf4567);
98 }
99 vacc0 = vaddq_f32(vacc0, vacc1);
100
101 float32x4_t vacc = vacc0;
102 for (; elements >= 4 * sizeof(float); elements -= 4 * sizeof(float)) {
103 const float32x4_t vi = vld1q_f32(input); input += 4;
104
105 const float32x4_t vx = vsubq_f32(vi, vi_max);
106
107 float32x4_t vn = vfmaq_f32(vmagic_bias, vx, vlog2e);
108
109 const int32x4_t ve = vshlq_n_s32(vbicq_s32(vreinterpretq_s32_f32(vn), vmovq_n_s32(INT32_C(0x3F))), 17);
110
111 const uint64x2_t vidx = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn), vindex_mask));
112 const uint64_t vidx_lo = vgetq_lane_u64(vidx, 0);
113 const uint64_t vidx_hi = vgetq_lane_u64(vidx, 1);
114 float32x2_t vl_lo = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx_lo]);
115 float32x2_t vl_hi = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx_hi]);
116 vl_lo = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx_lo >> 32)], vl_lo, 1);
117 vl_hi = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx_hi >> 32)], vl_hi, 1);
118 const float32x4_t vl = vcombine_f32(vl_lo, vl_hi);
119 const float32x4_t vs = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl), ve));
120
121 vn = vsubq_f32(vn, vmagic_bias);
122
123 float32x4_t vt = vfmaq_f32(vx, vn, vminus_ln2);
124
125 float32x4_t vp = vmulq_f32(vt, vc2);
126 vp = vfmaq_f32(vt, vt, vp);
127
128 float32x4_t vf = vfmaq_f32(vs, vs, vp);
129
130 vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcltq_f32(vx, vdenorm_cutoff)));
131
132 vst1q_f32(output, vf); output += 4;
133
134 vacc = vaddq_f32(vacc, vf);
135 }
136 #if XNN_ARCH_ARM64
137 float vacc_lo = vaddvq_f32(vacc);
138 #else
139 float32x2_t vacc_lo = vadd_f32(vget_high_f32(vacc), vget_low_f32(vacc));
140 #endif
141 if (elements != 0) {
142 assert(elements >= 1 * sizeof(float));
143 assert(elements <= 3 * sizeof(float));
144 const float32x4_t vi = vld1q_f32(input); input += 4;
145
146 const float32x4_t vx = vsubq_f32(vi, vi_max);
147
148 float32x4_t vn = vfmaq_f32(vmagic_bias, vx, vlog2e);
149
150 const int32x4_t ve = vshlq_n_s32(vbicq_s32(vreinterpretq_s32_f32(vn), vmovq_n_s32(INT32_C(0x3F))), 17);
151
152 const uint64x2_t vidx = vreinterpretq_u64_s32(vandq_s32(vreinterpretq_s32_f32(vn), vindex_mask));
153 const uint64_t vidx_lo = vgetq_lane_u64(vidx, 0);
154 const uint64_t vidx_hi = vgetq_lane_u64(vidx, 1);
155 float32x2_t vl_lo = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx_lo]);
156 float32x2_t vl_hi = vld1_dup_f32(&xnn_table_exp2_k_over_64[(uint32_t) vidx_hi]);
157 vl_lo = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx_lo >> 32)], vl_lo, 1);
158 vl_hi = vld1_lane_f32(&xnn_table_exp2_k_over_64[(uint32_t) (vidx_hi >> 32)], vl_hi, 1);
159 const float32x4_t vl = vcombine_f32(vl_lo, vl_hi);
160 const float32x4_t vs = vreinterpretq_f32_s32(vaddq_s32(vreinterpretq_s32_f32(vl), ve));
161
162 vn = vsubq_f32(vn, vmagic_bias);
163
164 float32x4_t vt = vfmaq_f32(vx, vn, vminus_ln2);
165
166 float32x4_t vp = vmulq_f32(vt, vc2);
167 vp = vfmaq_f32(vt, vt, vp);
168
169 float32x4_t vf = vfmaq_f32(vs, vs, vp);
170
171 vf = vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(vf), vcltq_f32(vx, vdenorm_cutoff)));
172
173 float32x2_t vf_lo = vget_low_f32(vf);
174 if (elements & (2 * sizeof(float))) {
175 vst1_f32(output, vf_lo); output += 2;
176
177 #if XNN_ARCH_ARM64
178 vacc_lo += vaddv_f32(vf_lo);
179 #else
180 vacc_lo = vadd_f32(vacc_lo, vf_lo);
181 #endif
182
183 vf_lo = vget_high_f32(vf);
184 }
185 if (elements & (1 * sizeof(float))) {
186 vst1_lane_f32(output, vf_lo, 0);
187
188 #if XNN_ARCH_ARM64
189 vacc_lo += vget_lane_f32(vf_lo, 0);
190 #else
191 vacc_lo = vadd_f32(vacc_lo, vreinterpret_f32_u64(vshl_n_u64(vreinterpret_u64_f32(vf_lo), 32)));
192 #endif
193 }
194 }
195 #if XNN_ARCH_ARM64
196 *sum = vacc_lo;
197 #else
198 vst1_lane_f32(sum, vpadd_f32(vacc_lo, vacc_lo), 0);
199 #endif
200 }
201