1 // Auto-generated file. Do not edit!
2 // Template: src/f16-f32-vcvt/neon-int16.c.in
3 // Generator: tools/xngen
4 //
5 // Copyright 2021 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/vcvt.h>
16
17
xnn_f16_f32_vcvt_ukernel__neon_int16_x32(size_t n,const void * input,float * output,const union xnn_f16_f32_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])18 void xnn_f16_f32_vcvt_ukernel__neon_int16_x32(
19 size_t n,
20 const void* input,
21 float* output,
22 const union xnn_f16_f32_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_OOB_READS
23 {
24 assert(n != 0);
25 assert(n % sizeof(uint16_t) == 0);
26 assert(input != NULL);
27 assert(output != NULL);
28
29 const uint16x8_t vsign_mask = vmovq_n_u16(0x8000);
30 const uint16x8_t vexp_offset = vmovq_n_u16(0x7000);
31 const float32x4_t vexp_scale = vld1q_dup_f32(¶ms->neon.exp_scale);
32 const uint32x4_t vmagic_bias = vmovq_n_u32(0x3F000000);
33 const uint16x8_t vdenorm_cutoff = vmovq_n_u16(0x0400);
34
35 const uint16_t* i = (const uint16_t*) input;
36 for (; n >= 32 * sizeof(uint16_t); n -= 32 * sizeof(uint16_t)) {
37 const uint16x8_t vh0 = vld1q_u16(i); i += 8;
38 const uint16x8_t vh1 = vld1q_u16(i); i += 8;
39 const uint16x8_t vh2 = vld1q_u16(i); i += 8;
40 const uint16x8_t vh3 = vld1q_u16(i); i += 8;
41
42 const uint16x8_t vsign0 = vandq_u16(vh0, vsign_mask);
43 const uint16x8_t vsign1 = vandq_u16(vh1, vsign_mask);
44 const uint16x8_t vsign2 = vandq_u16(vh2, vsign_mask);
45 const uint16x8_t vsign3 = vandq_u16(vh3, vsign_mask);
46
47 const uint16x8_t vnonsign0 = veorq_u16(vh0, vsign0);
48 const uint16x8_t vnonsign1 = veorq_u16(vh1, vsign1);
49 const uint16x8_t vnonsign2 = veorq_u16(vh2, vsign2);
50 const uint16x8_t vnonsign3 = veorq_u16(vh3, vsign3);
51
52 const uint16x8x2_t vprenorm0 = vzipq_u16(vshlq_n_u16(vnonsign0, 13), vsraq_n_u16(vexp_offset, vnonsign0, 3));
53 const uint16x8x2_t vprenorm1 = vzipq_u16(vshlq_n_u16(vnonsign1, 13), vsraq_n_u16(vexp_offset, vnonsign1, 3));
54 const uint16x8x2_t vprenorm2 = vzipq_u16(vshlq_n_u16(vnonsign2, 13), vsraq_n_u16(vexp_offset, vnonsign2, 3));
55 const uint16x8x2_t vprenorm3 = vzipq_u16(vshlq_n_u16(vnonsign3, 13), vsraq_n_u16(vexp_offset, vnonsign3, 3));
56
57 const float32x4_t vnorm0 = vmulq_f32(vreinterpretq_f32_u16(vprenorm0.val[0]), vexp_scale);
58 const float32x4_t vnorm1 = vmulq_f32(vreinterpretq_f32_u16(vprenorm0.val[1]), vexp_scale);
59 const float32x4_t vnorm2 = vmulq_f32(vreinterpretq_f32_u16(vprenorm1.val[0]), vexp_scale);
60 const float32x4_t vnorm3 = vmulq_f32(vreinterpretq_f32_u16(vprenorm1.val[1]), vexp_scale);
61 const float32x4_t vnorm4 = vmulq_f32(vreinterpretq_f32_u16(vprenorm2.val[0]), vexp_scale);
62 const float32x4_t vnorm5 = vmulq_f32(vreinterpretq_f32_u16(vprenorm2.val[1]), vexp_scale);
63 const float32x4_t vnorm6 = vmulq_f32(vreinterpretq_f32_u16(vprenorm3.val[0]), vexp_scale);
64 const float32x4_t vnorm7 = vmulq_f32(vreinterpretq_f32_u16(vprenorm3.val[1]), vexp_scale);
65
66 const float32x4_t vdenorm0 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign0))), vreinterpretq_f32_u32(vmagic_bias));
67 const float32x4_t vdenorm1 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign0))), vreinterpretq_f32_u32(vmagic_bias));
68 const float32x4_t vdenorm2 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign1))), vreinterpretq_f32_u32(vmagic_bias));
69 const float32x4_t vdenorm3 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign1))), vreinterpretq_f32_u32(vmagic_bias));
70 const float32x4_t vdenorm4 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign2))), vreinterpretq_f32_u32(vmagic_bias));
71 const float32x4_t vdenorm5 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign2))), vreinterpretq_f32_u32(vmagic_bias));
72 const float32x4_t vdenorm6 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign3))), vreinterpretq_f32_u32(vmagic_bias));
73 const float32x4_t vdenorm7 = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign3))), vreinterpretq_f32_u32(vmagic_bias));
74
75 const uint16x8_t vmask0 = vcgtq_u16(vnonsign0, vdenorm_cutoff);
76 const uint16x8_t vmask1 = vcgtq_u16(vnonsign1, vdenorm_cutoff);
77 const uint16x8_t vmask2 = vcgtq_u16(vnonsign2, vdenorm_cutoff);
78 const uint16x8_t vmask3 = vcgtq_u16(vnonsign3, vdenorm_cutoff);
79
80 const uint32x4_t vxmask0 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask0))));
81 const uint32x4_t vf0 = vorrq_u32(vshll_n_u16(vget_low_u16(vsign0), 16),
82 vreinterpretq_u32_f32(vbslq_f32(vxmask0, vnorm0, vdenorm0)));
83 const uint32x4_t vxmask2 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask1))));
84 const uint32x4_t vf2 = vorrq_u32(vshll_n_u16(vget_low_u16(vsign1), 16),
85 vreinterpretq_u32_f32(vbslq_f32(vxmask2, vnorm2, vdenorm2)));
86 const uint32x4_t vxmask4 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask2))));
87 const uint32x4_t vf4 = vorrq_u32(vshll_n_u16(vget_low_u16(vsign2), 16),
88 vreinterpretq_u32_f32(vbslq_f32(vxmask4, vnorm4, vdenorm4)));
89 const uint32x4_t vxmask6 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask3))));
90 const uint32x4_t vf6 = vorrq_u32(vshll_n_u16(vget_low_u16(vsign3), 16),
91 vreinterpretq_u32_f32(vbslq_f32(vxmask6, vnorm6, vdenorm6)));
92
93 const uint32x4_t vxmask1 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask0))));
94 const uint32x4_t vf1 = vorrq_u32(vshll_n_u16(vget_high_u16(vsign0), 16),
95 vreinterpretq_u32_f32(vbslq_f32(vxmask1, vnorm1, vdenorm1)));
96 const uint32x4_t vxmask3 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask1))));
97 const uint32x4_t vf3 = vorrq_u32(vshll_n_u16(vget_high_u16(vsign1), 16),
98 vreinterpretq_u32_f32(vbslq_f32(vxmask3, vnorm3, vdenorm3)));
99 const uint32x4_t vxmask5 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask2))));
100 const uint32x4_t vf5 = vorrq_u32(vshll_n_u16(vget_high_u16(vsign2), 16),
101 vreinterpretq_u32_f32(vbslq_f32(vxmask5, vnorm5, vdenorm5)));
102 const uint32x4_t vxmask7 = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask3))));
103 const uint32x4_t vf7 = vorrq_u32(vshll_n_u16(vget_high_u16(vsign3), 16),
104 vreinterpretq_u32_f32(vbslq_f32(vxmask7, vnorm7, vdenorm7)));
105
106 vst1q_f32(output, vreinterpretq_f32_u32(vf0)); output += 4;
107 vst1q_f32(output, vreinterpretq_f32_u32(vf1)); output += 4;
108 vst1q_f32(output, vreinterpretq_f32_u32(vf2)); output += 4;
109 vst1q_f32(output, vreinterpretq_f32_u32(vf3)); output += 4;
110 vst1q_f32(output, vreinterpretq_f32_u32(vf4)); output += 4;
111 vst1q_f32(output, vreinterpretq_f32_u32(vf5)); output += 4;
112 vst1q_f32(output, vreinterpretq_f32_u32(vf6)); output += 4;
113 vst1q_f32(output, vreinterpretq_f32_u32(vf7)); output += 4;
114 }
115 for (; n >= 8 * sizeof(uint16_t); n -= 8 * sizeof(uint16_t)) {
116 const uint16x8_t vh = vld1q_u16(i); i += 8;
117
118 const uint16x8_t vsign = vandq_u16(vh, vsign_mask);
119
120 const uint16x8_t vnonsign = veorq_u16(vh, vsign);
121
122 const uint16x8x2_t vprenorm = vzipq_u16(vshlq_n_u16(vnonsign, 13), vsraq_n_u16(vexp_offset, vnonsign, 3));
123 const float32x4_t vnorm_lo = vmulq_f32(vreinterpretq_f32_u16(vprenorm.val[0]), vexp_scale);
124 const float32x4_t vnorm_hi = vmulq_f32(vreinterpretq_f32_u16(vprenorm.val[1]), vexp_scale);
125
126 const float32x4_t vdenorm_lo = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign))), vreinterpretq_f32_u32(vmagic_bias));
127 const float32x4_t vdenorm_hi = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign))), vreinterpretq_f32_u32(vmagic_bias));
128
129 const uint16x8_t vmask = vcgtq_u16(vnonsign, vdenorm_cutoff);
130
131 const uint32x4_t vxmask_lo = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask))));
132 const uint32x4_t vf_lo = vorrq_u32(vshll_n_u16(vget_low_u16(vsign), 16),
133 vreinterpretq_u32_f32(vbslq_f32(vxmask_lo, vnorm_lo, vdenorm_lo)));
134
135 const uint32x4_t vxmask_hi = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask))));
136 const uint32x4_t vf_hi = vorrq_u32(vshll_n_u16(vget_high_u16(vsign), 16),
137 vreinterpretq_u32_f32(vbslq_f32(vxmask_hi, vnorm_hi, vdenorm_hi)));
138
139 vst1q_f32(output, vreinterpretq_f32_u32(vf_lo)); output += 4;
140 vst1q_f32(output, vreinterpretq_f32_u32(vf_hi)); output += 4;
141 }
142 if XNN_UNPREDICTABLE(n != 0) {
143 const uint16x8_t vh = vld1q_u16(i); i += 8;
144
145 const uint16x8_t vsign = vandq_u16(vh, vsign_mask);
146
147 const uint16x8_t vnonsign = veorq_u16(vh, vsign);
148
149 const uint16x8x2_t vprenorm = vzipq_u16(vshlq_n_u16(vnonsign, 13), vsraq_n_u16(vexp_offset, vnonsign, 3));
150 const float32x4_t vnorm_lo = vmulq_f32(vreinterpretq_f32_u16(vprenorm.val[0]), vexp_scale);
151 const float32x4_t vnorm_hi = vmulq_f32(vreinterpretq_f32_u16(vprenorm.val[1]), vexp_scale);
152
153 const float32x4_t vdenorm_lo = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_low_u16(vnonsign))), vreinterpretq_f32_u32(vmagic_bias));
154 const float32x4_t vdenorm_hi = vsubq_f32(vreinterpretq_f32_u32(vaddw_u16(vmagic_bias, vget_high_u16(vnonsign))), vreinterpretq_f32_u32(vmagic_bias));
155
156 const uint16x8_t vmask = vcgtq_u16(vnonsign, vdenorm_cutoff);
157
158 const uint32x4_t vxmask_lo = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_low_u16(vmask))));
159 uint32x4_t vf = vorrq_u32(vshll_n_u16(vget_low_u16(vsign), 16),
160 vreinterpretq_u32_f32(vbslq_f32(vxmask_lo, vnorm_lo, vdenorm_lo)));
161
162 if (n & (4 * sizeof(uint16_t))) {
163 vst1q_f32(output, vreinterpretq_f32_u32(vf)); output += 4;
164
165 const uint32x4_t vxmask_hi = vreinterpretq_u32_s32(vmovl_s16(vreinterpret_s16_u16(vget_high_u16(vmask))));
166 vf = vorrq_u32(vshll_n_u16(vget_high_u16(vsign), 16),
167 vreinterpretq_u32_f32(vbslq_f32(vxmask_hi, vnorm_hi, vdenorm_hi)));
168 }
169 uint32x2_t vf_lo = vget_low_u32(vf);
170 if (n & (2 * sizeof(uint16_t))) {
171 vst1_f32(output, vreinterpret_f32_u32(vf_lo)); output += 2;
172 vf_lo = vget_high_u32(vf);
173 }
174 if (n & (1 * sizeof(uint16_t))) {
175 vst1_lane_f32(output, vreinterpret_f32_u32(vf_lo), 0);
176 }
177 }
178 }
179