Author Topic: DIGIC 8 'PowerShot' development (M50, SX70, SX740)  (Read 4137 times)

srsa

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Re: DIGIC 8 'PowerShot' development (M50, SX70, SX740)
« Reply #75 on: February 12, 2019, 05:45:49 PM »
Not sure where to post this as it's both DIGIC 7 and 8 related.
I've noticed that D7 and D8 ports still have
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-march=armv7-rin platform/(cam)/Makefile.platform.default
"armv7-r" means ARM Cortex R. The Cortex R supports integer divide instructions in Thumb mode, whereas the Cortex A9 does not. To avoid getting undefined instruction exceptions in the future, I'd suggest using
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-march=armv7-ainstead.

a1ex

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Re: DIGIC 8 'PowerShot' development (M50, SX70, SX740)
« Reply #76 on: February 12, 2019, 09:29:51 PM »
Thanks, I wasn't aware of this difference.