Hallo to everyone.
My problem is to have the upper 4 Byte result of a multiply. For example:
unsigned int a=1000000000;//only example value unsigned int b=10000000000; unsigned int c;
the result of a*b = 0x8AC7230489E80000 How to get the upper 4 Bytes: 0x8AC72304 How to get the lower 4 Bytes: 0x89E80000
Can anybody help? I have to programm a super-fast-interrupt-routine for an microcontroller, there is not enough time for floating point.