Can the XC compiler do any register contents reuse for later instructions?
The little code I have looked at (-O3 optimization) does not appear to reuse existing register contents across XC instructions. So if I want to optimize for this I need to use inline Assembler?
Just checking I have not missed something before I spend the time to do this for my filters to save a few instructions.
Is there a list somewhere of assembler "tricks" to save cycles or memory?
I found one so far in sample code that you can use LSUB to zero two registers in one instruction (although I will have to experiment with this to figure out the syntax). Any others?
XC Optimization Question and Assembler "Tricks" Question
Are you able to post an example of some code that isn't optimised?bearcat wrote:Can the XC compiler do any register contents reuse for later instructions?
The little code I have looked at (-O3 optimization) does not appear to reuse existing register contents across XC instructions. So if I want to optimize for this I need to use inline Assembler?
As Richard says, we welcome optimisation requests or optimisation bug reports. Please submit them via support tracking at www.xmos.com/support (click "Support Tickets").