1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
#include "benchmark_helpers.hpp"
#include "../simd_memory.hpp"
#define LOOP(length, stmt) for (int xxi=0; xxi<(length); ++xxi) { stmt; }
#define ZXP(z) (*++(z))
#define ZOFF (1)
void __noinline__ bench_1(float * out, unsigned int numSamples)
{
if ((numSamples & 1) == 0) {
double *outd = (double*)out - ZOFF;
LOOP(numSamples >> 1, ZXP(outd) = 0.; );
} else {
out -= ZOFF;
LOOP(numSamples, ZXP(out) = 0.f; );
}
}
void __noinline__ bench_2(float * out, unsigned int numSamples)
{
int i;
for(i = 0; i < numSamples; ++i)
out[i] = 0.f;
}
void __noinline__ bench_3(float * out, unsigned int numSamples)
{
int i;
float *loc = out;
for(i = 0; i < numSamples; ++i)
*(loc++) = 0.f;
}
void __noinline__ bench_4(float * out, unsigned int numSamples)
{
int i;
float *loc = out - 1;
for(i = 0; i < numSamples; ++i)
*(++loc) = 0.f;
}
void __noinline__ bench_5(float * out, unsigned int numSamples)
{
int i = numSamples;
do{
out[--i] = 0.f;
}while(i != 0);
}
#define DUFF_DEVICE_8(aCount, aAction) \
{ \
int count_ = (aCount); \
int times_ = (count_ + 7) >> 3; \
switch (count_ & 7){ \
case 0: do { aAction; \
case 7: aAction; \
case 6: aAction; \
case 5: aAction; \
case 4: aAction; \
case 3: aAction; \
case 2: aAction; \
case 1: aAction; \
} while (--times_ > 0); \
} \
}
void __noinline__ bench_6(float * out, unsigned int numSamples)
{
float *loc = out;
DUFF_DEVICE_8(numSamples, *(loc++)=0.f;);
}
void __noinline__ bench_7(float * out, unsigned int numSamples)
{
float *loc = out - 1;
DUFF_DEVICE_8(numSamples, *(++loc)=0.f;);
}
void __noinline__ bench_8(float * out, unsigned int numSamples)
{
memset(out, 0, numSamples * sizeof(float));
}
void __noinline__ bench_9(float * out, unsigned int numSamples)
{
bzero(out, numSamples * sizeof(float));
}
void __noinline__ bench_10(float * out, unsigned int numSamples)
{
int i;
float *loc = out;
for(i = numSamples >> 2; i != 0; --i){ // Unroll into blocks of four
*(loc++) = 0.f;
*(loc++) = 0.f;
*(loc++) = 0.f;
*(loc++) = 0.f;
}
// These two "if"s handle the remainder, if not divisible exactly by four
if(numSamples & 1){
*(loc++) = 0.f;
}
if(numSamples & 2){
*(loc++) = 0.f;
*(loc++) = 0.f;
}
}
using namespace nova;
void __noinline__ bench_11(float * out, unsigned int numSamples)
{
zerovec_simd<64>(out);
}
void __noinline__ bench_12(float * out, unsigned int numSamples)
{
zerovec_simd<64>(out);
if (numSamples-64)
zerovec(out+64, numSamples-64);
}
void __noinline__ bench_13(float * out, unsigned int numSamples)
{
zerovec_simd(out, numSamples);
}
void __noinline__ bench_14(float * out, unsigned int numSamples)
{
unsigned int unrolled = numSamples & ~8;
unsigned int remain = numSamples - unrolled;
if (unrolled)
zerovec_simd(out, unrolled);
if (remain)
zerovec(out, remain);
}
template <typename F>
inline void zerovec_8(F * dest, uint n)
{
for (uint i = 0; i != n; i+=8)
{
dest[i+0] = dest[i+1] = dest[i+2] = dest[i+3] = dest[i+4] =
dest[i+5] = dest[i+6] = dest[i+7] = 0;
}
}
void __noinline__ bench_15(float * out, unsigned int numSamples)
{
zerovec_8(out, numSamples);
}
void __noinline__ bench_16(float * out, unsigned int numSamples)
{
unsigned int unrolled = numSamples & ~8;
unsigned int remain = numSamples - unrolled;
if (unrolled)
zerovec_8(out, unrolled);
if (remain)
zerovec(out, remain);
}
void __noinline__ bench_17(float * out, unsigned int numSamples)
{
zerovec(out, numSamples);
}
void __noinline__ bench_18(float * out, unsigned int numSamples)
{
unsigned int unrolled = numSamples & ~8;
unsigned int remain = numSamples - unrolled;
if (unrolled)
zerovec_na_simd<float>(out, unrolled);
if (remain)
zerovec(out, remain);
}
int main(void)
{
const int iterations = 50000000;
nova::aligned_array<float, 1024> buffer;
fill_container(buffer);
run_bench(boost::bind(bench_1, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_2, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_3, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_4, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_5, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_6, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_7, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_8, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_9, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_10, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_11, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_12, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_13, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_14, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_15, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_16, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_17, buffer.begin(), 64), iterations);
run_bench(boost::bind(bench_18, buffer.begin(), 64), iterations);
}
|
