RM0020 datasheet(65/69 Pages) STMICROELECTRONICS

65 / 69 page

RM0020

Performance

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Table 49.

sobel3x3 - sobel filter(1)

MxN(2)

First function

call [clock

cycles]

Second function

call [clock

cycles]

Third function

call [clock

cycles]

Improvement to

C function [-]

IPC

[-]

16x8

1304

1256

1248

3.0

0.98

8x16

1209

1162

3.1

0.97

10x16

1569

1528

3.1

0.97

32x32

11419

11318

11314

3.3

0.99

The number of instructions executed is 38+(M-2)*(37+48*(N-4)/4).

MxN is size of input and output matrix (M is number of rows).

Table 50.

sobel3x3_horizontal - horizontal sobel filter(1)

MxN(2)

First function

call [clock

cycles]

Second function

call [clock

cycles]

Third function

call [clock

cycles]

Improvement to

C function [-]

IPC

[-]

16x8

904

871

2.7

0.98

8x16

852

812

2.8

0.96

10x16

1100

1066

2.8

0.96

32x32

7910

7820

2.9

0.99

The number of instructions executed is 28+(M-2)*(26+33*(N-4)/4).

MxN is size of input and output matrix (M is number of rows).

Table 51.

sobel3x3_vertical - vertical sobel filter(1)

MxN(2)

First function

call [clock

cycles]

Second function

call [clock

cycles]

Third function

call [clock

cycles]

Improvement to

C function [-]

IPC

[-]

16x8

935

907

2.9

0.96

8x16

841

815

3.1

0.96

10x16

1099

1071

3.1

0.97

32x32

7932

7847

3.3

0.99

The number of instructions executed is 28+(M-2)*(27+33*(N-4)/4).

MxN is size of input and output matrix (M is number of rows).

Table 52.

corr_frac16 - correlation function

N(1)

M(1)

First function

call [clock

cycles]

Second function

call [clock

cycles]

Third function

call [clock

cycles]

Improvement to

C function [-]

IPC

[-]

4.0

0.86

400

368

355

4.6

0.92

1168

1115

4.8

0.96

128

15161

15083

4.7

0.99

256

58938

58808

58795

4.6

1.00

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