AM2634: MCU-PLUS_SDK-AM263x : FPU Setting

jukyong lim

Prodigy 35 points

Part Number: AM2634
Other Parts Discussed in Thread: SYSCONFIG,

Hello

I am using the AM263x. I want to us FPU because current float matrix calculation is too slow.

how do I enable FPU?

This is the current setting

- Arm Compiler (flags set)

-mcpu=cortex-r5 -mfloat-abi=hard -mfpu=vfpv3-d16 -mlittle-endian -mthumb -O0 -finline-functions -I"${SYSCONFIG_TOOL_INCLUDE_PATH}" -I"${MCU_PLUS_SDK_PATH}/source/ioexp" -I"${COM_TI_MCU_PLUS_SDK_AM263X_INSTALL_DIR}/source/drivers" -I"${PROJECT_LOC}/include" -I"${COM_TI_MCU_PLUS_SDK_AM263X_INCLUDE_PATH}" -I"${CG_TOOL_ROOT}/include/c" -I"${MCU_PLUS_SDK_PATH}/source" -D${SYSCONFIG_TOOL_SYMBOLS} -DV0 -D${COM_TI_MCU_PLUS_SDK_AM263X_SYMBOLS} -DSOC_AM263X -g -Wall -Wno-gnu-variable-sized-type-not-at-end -Wno-unused-function

over 3 years ago

0 Sri Vidya Gunturi over 3 years ago

TI__Expert 7586 points

Thanks for asking the question.

FPU:

The FPU settings are already enabled by default in all the examples in SDK. (-mfloat-abi=hard -mfpu=vfpv3-d16)

FPU settings can be found in "Rightclick on the example --> Properties --> Arm Compiler --> Processor Options"

jukyong lim said:
current float matrix calculation is too slow.

Release Mode:

Could you change the build settings to release mode.

By default the release mode optimizations are set to -Os.

If you want further optimization you can increase it to -O3 or -Oz depending on your requirement.

The Debug mode adds additional software over head which slows down the code.

Link Time Optimization:

Enable LTO Option in your Compiler settings for better performance. This enables compiler to perform an inter-module constant merging optimization that results in a memory and speed optimization.

software-dl.ti.com/.../lto_benefits.html