• State Not Answered
  • Locked Locked
  • Replies 9 replies
  • Subscribers 350 subscribers
  • Views 32781 views
  • Users 0 members are here
2025 survey

We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.

Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

compiler optimization options for ARMv8 GCC compiler on ARM cortex a53 (bare metal application)

khan777

I am using ARMv8 GCC compiler(aarch64-none-elf-gcc) for my bare metal application on ARM cortex a53. I am using neon intrinsics with plain C in my code so I would like to ensure to use all optimization option available for this compiler.

I tried -mfpu = neon but compiler is not recognizing it. So, what are the possible optimization option available for my application setting. I am using Xilinx SDK  IDE for my application.

Parents
  • 0 in reply to XNoOp

    gcc 9.1.0

    Guess that answers your question:

    arm-none-eabi-gcc -mgeneral-regs-only -march=armv7-a -mfpu=vfpv3 -S float.c -mfloat-abi=hard
float.c: In function 'res':
float.c:1:5: error: argument of type 'float' not permitted with -mgeneral-regs-only
    1 | int res(float a, float b)
      |     ^~~

Reply
  • 0 in reply to XNoOp

    gcc 9.1.0

    Guess that answers your question:

    arm-none-eabi-gcc -mgeneral-regs-only -march=armv7-a -mfpu=vfpv3 -S float.c -mfloat-abi=hard
float.c: In function 'res':
float.c:1:5: error: argument of type 'float' not permitted with -mgeneral-regs-only
    1 | int res(float a, float b)
      |     ^~~

Children
No data