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

can coprocessor instruction be produced by compiler from c code

Note: This was originally posted on 18th April 2013 at http://forums.arm.com

can accessing coprocessor instruction be produced by compiler from c code？

except float point instructions?

such like drain write buffer instruction?

any docs describe detail of this?

Parents

rensheng yang over 12 years ago

Note: This was originally posted on 19th April 2013 at http://forums.arm.com

i know this feature, named register.

i mean compiler translate c code to arm instructions. except this extension of c code added by specific compiler, can normal c code produce instructions like 'MCR'?

etc, we write
int a;
int b;
int c=a+b;

this will translate to load and modify instructions. or we can use hard-float to control translate to float instructions.

how we can control coprocessor instructions produced from normall C code express?

i think usually c code is used for moving data, so may not produce control instructions, is this right? any theory?
Cancel
Vote up 0 Vote down

Cancel

Reply

rensheng yang over 12 years ago

Note: This was originally posted on 19th April 2013 at http://forums.arm.com

i know this feature, named register.

i mean compiler translate c code to arm instructions. except this extension of c code added by specific compiler, can normal c code produce instructions like 'MCR'?

etc, we write
int a;
int b;
int c=a+b;

this will translate to load and modify instructions. or we can use hard-float to control translate to float instructions.

how we can control coprocessor instructions produced from normall C code express?

i think usually c code is used for moving data, so may not produce control instructions, is this right? any theory?
Cancel
Vote up 0 Vote down

Cancel

Children

No data