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 10. Precision32 Unused Code Removal Comparison—sim3u1xx_Blinky Debug

Library

newlib nohosting with no

unused code removal

newlib nohosting with

unused code removal

redlib nohosting with no

unused code removal

redlib nohosting with unused

code removal

Code (bytes)

Read Only Data Read-Write Data Zero-Initialized

(bytes)

(bytes)

Data (bytes)

35504

2248

68

35112

2248

68

13472

4

344

13080

4

344

Table 11. Precision32 Unused Code Removal Comparison—demo_si32UsbAudio Debug

Library

newlib nohosting with no

unused code removal

newlib nohosting with

unused code removal

redlib nohosting with no

unused code removal

redlib nohosting with unused

code removal

Code (bytes)

Read Only Data Read-Write Data Zero-Initialized

(bytes)

(bytes)

Data (bytes)

122424

7240

12116

108144

6944

11848

90288

5000

12392

76120

4704

12124

Table 12. Precision32 Unused Code Removal Comparison—CoreMark Debug Size

Library

newlib semihosting with no

unused code removal

newlib semihosting with

unused code removal

redlib nohosting with no

unused code removal

redlib nohosting with unused

code removal

Code (bytes)

Read Only Data Read-Write Data Zero-Initialized

(bytes)

(bytes)

Data (bytes)

47188

2368

2140

46900

2352

2140

24656

124

2360

24344

112

2360

Table 13. Precision32 Unused Code Removal Comparison—CoreMark Debug Speed

Library

newlib semihosting with no

unused code removal

newlib semihosting with

unused code removal

redlib nohosting with no

unused code removal

redlib nohosting with unused

code removal

CoreMark Score

CoreMark 1.0 : 37.452232 / GCC4.6.2 20110921 (release) [ARM/embedded-4_6-

branch revision 182083] Iterations=3000 / STACK

CoreMark 1.0 : 37.571643 / GCC4.6.2 20110921 (release) [ARM/embedded-4_6-

branch revision 182083] Iterations=3000 / STACK

CoreMark 1.0 : 37.875848 / GCC4.6.2 20110921 (release) [ARM/embedded-4_6-

branch revision 182083] Iterations=3000 / STACK

CoreMark 1.0 : 37.571643 / GCC4.6.2 20110921 (release) [ARM/embedded-4_6-

branch revision 182083] Iterations=3000 / STACK

Rev. 0.1

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