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Many 8bit processors such as AVR have instructions that work with 16 bit numbers (stored in register pairs). So that's not the case.
by revelation 11y ago
Many 8bit processors such as AVR have instructions that work with 16 bit numbers (stored in register pairs). So that's not the case.
- kevin_thibedeau 11y agoThat only applies to adds, subtracts, and register moves. 16-bit Booleans, shifts/rotates, multiplies, and load/store still need to be done with multiple instructions.
- Gibbon1 11y agoI did a little mucking on some AVR code of mine. Sometimes going from an uint8_t to a uint16_t saves a couple of bytes Sometimes adds a dozen. One case changing an index in a for loop to an int, code went from 34024 bytes to 34018 (saved four bytes). But changing uint8_t i, j, k; to uint16_t i, j, k; code compiled to 34068 bytes, gain of 44 bytes.