Quoting Galen Seitz <[EMAIL PROTECTED]>:
> Because I wanted more control over multiplies, I've started creating
> routines like these:
>
>
> extern inline uint16_t
> mult_u16_u8u8(uint8_t a, uint8_t b)
> {
> uint16_t product;
> asm (
> "mul %1, %2" "\n\t"
> "movw %0, r0" "\n\t"
> "clr r1" "\n\t"
> : "=w" (product)
> : "r" (a), "r" (b)
> );
> return product;
> }
>
>
> extern inline uint16_t
> mult_u8h_u8u8(uint8_t a, uint8_t b)
> {
> uint8_t product_high;
> asm (
> "mul %1, %2" "\n\t"
> "mov %0, r1" "\n\t"
> "clr r1" "\n\t"
> : "=w" (product_high)
> : "r" (a), "r" (b)
> );
> return product_high;
> }
>
>
>
> I have a few others if people are interested.
>
Interesting. Would you be willing to submit a patch to the avr-libc Patch
Tracker?
Thanks
Eric
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