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 Robotics / RCX / 1207
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Subject: 
Re: H8/300 Assembler/C interface
Newsgroups: 
lugnet.robotics.rcx
Date: 
Thu, 19 Apr 2001 15:59:23 GMT
Viewed: 
1285 times
  
Ralph Hempel <rhempel@bmts.com> wrote:
One more question, are the other registers r3,r4,r5,r6 considered
volatile across a function call in GCC?

By the caller?  No.  They are callee-save.

-Kekoa



Message has 1 Reply:
  RE: H8/300 Assembler/C interface
 
(...) Ahhh, that makes it awkward with the RCX ROM calls, but I'm pretty sure I can make my assembler source compatible with this. I'm just getting ready to release an assembler RCX serial library that is either polled or interrupt driven. Any (...) (23 years ago, 19-Apr-01, to lugnet.robotics.rcx)

Message is in Reply To:
  RE: H8/300 Assembler/C interface
 
(...) Thanks Kekoa. One more question, are the other registers r3,r4,r5,r6 considered volatile across a function call in GCC? Cheers, Ralph (23 years ago, 19-Apr-01, to lugnet.robotics.rcx)

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