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

Figure 4. Using the Precision32 IDE to Select the Project Library

Using the sim3u1xx_Blinky and demo_si32UsbAudio default examples in the si32HAL 1.0.1 software package,

Table 1 and Table 2 show the relative Debug build sizes with the different toolchain library options. Table 3 shows

the Debug build sizes for CoreMark, and Table 4 shows the relative CoreMark speed scores for each of these

library options.

For the newlib and redlib none libraries, see “5.4. Function Library Usage”.

Table 1. Precision32 Toolchain Library Usage Comparison—sim3u1xx_Blinky Debug

Library

newlib semihosting

newlib nohosting

newlib none

redlib semihosting

redlib nohosting

redlib none

Code (bytes)

Read Only Data Read-Write Data

(bytes)

(bytes)

35564

2248

34864

2248

N/A (requires printf() removal)

13080

4

13136

4

N/A (requires printf() removal)

Zero-Initialized

Data (bytes)

124

68

344

344

6

Rev. 0.1

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