AN720 データシートの表示（PDF） - Silicon Laboratories

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AN720

PRECISION32 OPTIMIZATIONCONSIDERATIONS FOR CODESIZE ANDSPEED

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AN720

Table 5. Precision32 printf() Comparison—sim3u1xx_Blinky Debug

Library

newlib semihosting with printf

newlib nohosting with printf

newlib nohosting with integer

printf (iprintf)

newlib nohosting with puts

instead of printf

newlib nohosting without printf

newlib none with all calls to stdio

and printf removed

redlib semihosting with printf

redlib nohosting with printf

redlib nohosting with integer

printf (CR_INTEGER_PRINTF)

redlib nohosting with puts

instead of printf

redlib nohosting without printf

redlib none with all calls to stdio

and printf removed

Code (bytes)

Read Only Data Read-Write Data

(bytes)

(bytes)

35564

2248

34864

2248

19800

2248

Zero-Initialized

Data (bytes)

124

68

68

8784

2120

68

2064

2064

4

8

4

8

12880

12824

8111

4

344

4

344

4

344

4004

4

344

3868

2068

4

344

4

8

Rev. 0.1

9

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