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 2. Precision32 Toolchain Library Usage Comparison—demo_si32UsbAudio Debug

Library

newlib semihosting

newlib nohosting

newlib none

redlib semihosting

redlib nohosting

redlib none

Code (bytes)

Read Only Data Read-Write Data

(bytes)

(bytes)

108844

6944

108144

6944

N/A (requires printf() removal)

76176

4704

76120

4704

N/A (requires printf() removal)

Zero-Initialized

Data (bytes)

11904

11848

12124

12124

Table 3. Precision32 Toolchain Library Usage Comparison—CoreMark Debug Size

Library

newlib semihosting

newlib nohosting

newlib none

redlib semihosting

redlib nohosting

redlib none

Code (bytes)

Read Only Data Read-Write Data

(bytes)

(bytes)

46900

2352

46208

2352

N/A (requires printf() removal)

24400

112

24344

112

N/A (requires printf() removal)

Zero-Initialized

Data (bytes)

2140

2084

2360

2360

Table 4. Precision32 Toolchain Library Usage Comparison—CoreMark Debug Speed

Library

newlib semihosting

newlib nohosting

newlib none

redlib semihosting

redlib nohosting

redlib none

CoreMark Score

CoreMark 1.0 : 37.571643 / 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

N/A (requires printf() removal)

CoreMark 1.0 : 37.571643 / 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

N/A (requires printf() removal)

Rev. 0.1

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