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

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PRECISION32 OPTIMIZATIONCONSIDERATIONS FOR CODESIZE ANDSPEED

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AN720

Table 23. Keil Toolchain Optimization Comparison—CoreMark Debug Size

Library

µVision MicroLIB -O0

µVision MicroLIB -O0

(with Optimize for Time)

µVision MicroLIB -O1

µVision MicroLIB -O1

(with Optimize for Time)

µVision MicroLIB -O2

µVision MicroLIB -O2

(with Optimize for Time)

µVision MicroLIB -O3

µVision MicroLIB -O3

(with Optimize for Time)

Code (bytes)

11276

11276

Read Only

Data (bytes)

636

636

Read-Write

Data (bytes)

156

156

Zero-Initialized

Data (bytes)

3536

3536

9788

616

10136

616

140

3536

140

3536

9640

616

10684

616

140

3536

140

3536

9680

616

11500

616

140

3536

140

3536

Table 24. Keil Toolchain Optimization Comparison—CoreMark Debug Speed

Library

µVision MicroLIB -O0

µVision MicroLIB -O0

(with Optimize for Time)

µVision MicroLIB -O1

µVision MicroLIB -O1

(with Optimize for Time)

µVision MicroLIB -O2

µVision MicroLIB -O2

(with Optimize for Time)

µVision MicroLIB -O3

µVision MicroLIB -O3

(with Optimize for Time)

CoreMark Score

CoreMark 1.0 : 69.402323 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 69.402323 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 75.279256 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 75.206352 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 74.247855 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 87.277701 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 79.520321 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

CoreMark 1.0 : 102.697150 / ARM4.2 (EDG gcc mode) Iterations=3000 / STACK

24

Rev. 0.1

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