1 /**
2 * Copyright 2021 Huawei Technologies Co., Ltd
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "nnacl/fp16/power_fp16.h"
18 #include "nnacl/errorcode.h"
19
20 #if defined(ENABLE_NEON)
OptimizedPowerSimdFp16(float16x8_t x,const void * exponent)21 float16x8_t OptimizedPowerSimdFp16(float16x8_t x, const void *exponent) {
22 int tmp = (int)(*(float16_t *)exponent);
23 int exp = abs(tmp);
24 float16x8_t result = vmovq_n_f16(1.0f);
25 while (exp) {
26 if (exp % 2) {
27 result *= x;
28 }
29 x *= x;
30 exp = exp / 2;
31 }
32 if (tmp >= 0) {
33 return result;
34 }
35 return 1 / result;
36 }
37 #endif
38
OptimizedPowerScalarFp16(float16_t x,const void * exponent)39 float16_t OptimizedPowerScalarFp16(float16_t x, const void *exponent) {
40 int tmp = *(float16_t *)exponent;
41 int exp = abs(tmp);
42 float16_t result = 1;
43 while (exp) {
44 if (exp % 2) {
45 result *= x;
46 }
47 x *= x;
48 exp = exp / 2;
49 }
50 return tmp >= 0 ? result : 1 / result;
51 }
52
PowerBroadCastFp16(const float16_t * input,const float16_t * exponent,float16_t * output,int len,float scale,float shift)53 void PowerBroadCastFp16(const float16_t *input, const float16_t *exponent, float16_t *output, int len, float scale,
54 float shift) {
55 PowerScalarFunFp16 PowerScalarFunFp16_ = NULL;
56 #if defined(ENABLE_NEON)
57 PowerSimdFunFp16 PowerSimdFunFp16_ = NULL;
58 #endif
59
60 if (CheckIntegerFp16(*exponent)) {
61 #if defined(ENABLE_NEON)
62 PowerSimdFunFp16_ = OptimizedPowerSimdFp16;
63 #endif
64 PowerScalarFunFp16_ = OptimizedPowerScalarFp16;
65 } else {
66 #if defined(ENABLE_NEON)
67 PowerSimdFunFp16_ = StdPowerSimdFp16;
68 #endif
69 PowerScalarFunFp16_ = StdPowerScalarFp16;
70 }
71 int i = 0;
72 #ifdef ENABLE_NEON
73 int len_c8 = DOWN_ROUND(len, C8NUM);
74 float16x8_t scale_8 = vmovq_n_f16(scale);
75 float16x8_t shift_8 = vmovq_n_f16(shift);
76 for (; i < len_c8; i += C8NUM) {
77 float16x8_t result = PowerSimdFunFp16_(scale_8 * vld1q_f16(input + i) + shift_8, exponent);
78 vst1q_f16(output + i, result);
79 }
80 #endif
81 for (; i < len; ++i) {
82 output[i] = PowerScalarFunFp16_(scale * input[i] + shift, exponent);
83 }
84 }
85
PowerSingleFp16(const float16_t * input,const float16_t * exponent,float16_t * output,int len,float scale,float shift)86 void PowerSingleFp16(const float16_t *input, const float16_t *exponent, float16_t *output, int len, float scale,
87 float shift) {
88 int i = 0;
89 PowerScalarFunFp16 PowerScalarFunFp16_ = NULL;
90 #ifdef ENABLE_NEON
91 int len_c8 = DOWN_ROUND(len, C8NUM);
92 float16x8_t scale_8 = vmovq_n_f16(scale);
93 float16x8_t shift_8 = vmovq_n_f16(shift);
94 for (; i < len_c8; i += C8NUM) {
95 float16x8_t tmp_8 = scale_8 * vld1q_f16(input + i) + shift_8;
96 for (int j = 0; j < 8; ++j) {
97 PowerScalarFunFp16_ = CheckIntegerFp16(exponent[i + j]) ? OptimizedPowerScalarFp16 : StdPowerScalarFp16;
98 output[i + j] = PowerScalarFunFp16_(tmp_8[j], exponent + i + j);
99 }
100 }
101 #endif
102 for (; i < len; ++i) {
103 PowerScalarFunFp16_ = CheckIntegerFp16(exponent[i]) ? OptimizedPowerScalarFp16 : StdPowerScalarFp16;
104 output[i] = PowerScalarFunFp16_(scale * input[i] + shift, exponent + i);
105 }
106 }
107
PowerFp16(const float16_t * input,const float16_t * exponent,float16_t * output,int len,float scale,float shift,bool broadcast)108 int PowerFp16(const float16_t *input, const float16_t *exponent, float16_t *output, int len, float scale, float shift,
109 bool broadcast) {
110 if (input == NULL || exponent == NULL || output == NULL) {
111 return NNACL_NULL_PTR;
112 }
113 PowerFunFp16 PowerFunFp16_ = NULL;
114 PowerFunFp16_ = broadcast ? PowerBroadCastFp16 : PowerSingleFp16;
115 PowerFunFp16_(input, exponent, output, len, scale, shift);
116 return NNACL_OK;
117 }
118