RE: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os

[Stu Bell]

> The PORTA bits are used for hardware control.  I want to use the
atan2(), etc. calls as pulse stretching.

Then I recommend using the calls in <util/delay.h> to get exact delays
instead of monkeying around with floating point routine calls.  They'll
be a lot more exact as well as being a boatlad smaller!


Best regards, 

Stu Bell 
DataPlay (DPHI, Inc.) 


-----Original Message-----
From: address@hidden
[mailto:address@hidden On Behalf Of
Thomas D. Dean
Sent: Friday, May 16, 2008 10:06 AM
To: address@hidden
Cc: address@hidden
Subject: Re: [avr-gcc-list] Avr-gcc Produces Incorrect Code with -Os

In my case, I want to allow interrupts, just want to keep the statement
ordering in the code segment.

The PORTA bits are used for hardware control.  I want to use the
atan2(), etc. calls as pulse stretching.

Making the resultant variable volatile works.

tomdean


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