AN910 datasheet(22/51 Pages) STMICROELECTRONICS

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ST7 AND ST9 PERFORMANCE BENCHMARKING

Table 5. Computing performance execution time measures

(1) The 80C51 results are preliminary results. They may changed in later versions.

Table 6. Computing performance execution time ratios

Execution time

measures (ms)

80C51XA

(20 MHz)

68HC16

(16 MHz)

68HC12

(8 MHz)

ST9+

(25 MHz)

ST9

(12 MHz)

H8/300

(10 MHz)

68HC11

(4 MHz)

68HC08

(8 MHz)

ST7

(8 MHz)

ST7

(4 MHz)

80C51(1)

(20 MHz)

sieve

▲

25.1

27.8

47.5

41.4

142

147

acker(3,5)

▲

148

224

230

268

868

916

950

acker(3,6)

▲

602

920

936

1,090

3,530

3,720

3,850

string

0.178

0.157

▲

0.15

0.160

0.514

0.369

0.54

0.264

0.345

0.690

▼

1.17

char

0.042

0.039

▲ 0.037

0.048

0.149

0.071

0.140

0.039

0.0070

0.140

0.142

bubble(10 words)

▲ 0.170

0.223

0.328

0.306

0.988

0.741

1.33

1.14

1.09

2.18

1.99

bubble(600 words)

▲

638

968

1,280

1,190

3,830

3,750

5,130

4,280

▼ 8,560

blkmov(64 bytes)

▲ 0.025

0.035

0.037

0.057

0.174

0.036

0.259

0.078

0.153

0.305

0.233

blkmov(512 bytes)

▲ 0.167

0.272

0.289

0.452

1.36

0.261

2.05

1.34

2.67

(8.61)

convert

▲ 0.146

0.227

0.288

0.223

0.766

0.397

0.82

0.265

0.452

0.904

0.584

16mul

0.0019

0.0017

▲ 0.0016

0.0068

0.020

0.012

0.029

0.013

0.018

0.037

0.035

shright

▲ 0.0013

0.0038

0.0046

0.0034

0.011

0.010

0.017

0.0072

0.010

0.020

▼ 0.031

bitsrt

▲ 0.047

0.050

0.055

0.059

0.178

0.071

0.215

0.086

0.092

0.183

0.203

Execution time

ratios

80C51XA

(20 MHz)

68HC16

(16 MHz)

68HC12

(8 MHz)

ST9+

(25 MHz)

ST9

(12 MHz)

H8/300

(10 MHz)

68HC11

(4 MHz)

68HC08

(8 MHz)

ST7

(8 MHz)

ST7

(4 MHz)

80C51(1)

(20 MHz)

sieve

▲

1.65

1.49

0.87

1.00

0.29

0.28

acker(3,5)

▲

1.81

1.20

1.16

1.00

0.31

0.29

0.28

acker(3,6)

▲

1.81

1.18

1.16

1.00

0.31

0.29

0.28

string

0.90

1.02

▲

1.05

1.00

0.31

0.43

0.30

0.61

0.46

0.23

▼

0.14

char

1.14

1.23

▲

1.28

1.00

0.32

0.67

0.34

1.23

0.68

0.34

bubble(10 words)

▲

1.80

1.37

0.93

1.00

0.31

0.41

0.23

0.27

0.28

0.14

0.15

bubble(600 words)

▲

1.87

1.23

0.93

1.00

0.31

0.32

0.23

0.28

▼

0.14

blkmov(64 bytes)

▲

2.30

1.65

1.56

1.00

0.33

1.57

0.22

0.74

0.38

0.19

0.25

blkmov(512 bytes)

▲

2.71

1.66

1.56

1.00

0.33

1.73

0.22

0.34

0.17

(0.052)

convert

▲

1.54

0.98

0.78

1.00

0.29

0.56

0.27

0.84

0.49

0.25

0.38

16mul

3.60

3.92

▲

4.22

1.00

0.35

0.56

0.23

0.52

0.37

0.19

0.20

shright

▲

2.67

0.92

0.75

1.00

0.30

0.35

0.20

0.48

0.34

0.17

▼ 0.11

bitsrt

▲

1.25

1.18

1.08

1.00

0.33

0.83

0.27

0.69

0.65

0.32

0.29

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