On 2021-11-30 08:49, Vladimir Murzin wrote:

One month and a week later...

I observe that in terms of performance

   MRS       r0, ipsr

is equivalent to readl_relaxed(BASEADDR_V7M_SCB + V7M_SCB_ICSR)

   MOV.W   r3, #3758153728
   LDR.W   r0, [r3, #3332]

Old compilers can produce less performant sequence like

   LDR      r3,0xbcc0
   ADD.W    r3,r3,#0xaf00
   LDR      r0,[r3,#0]

So, what would be your preference?

If there is no significant overhead to reading the MMIO register
and that you see a benefit in enabling COMPILE_TEST, then this
probably is the way to go.

Thanks,

         M.
-- 
Jazz is not dead. It just smells funny...

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