If anything, bit order on most CPUs can be considered "little endian", because that's how CPU documentation numbers the bits (0, the first, being the lowest ord

If anything, bit order on most CPUs can be considered "little endian", because that's how CPU documentation numbers the bits (0, the first, being the lowest order). Not to mention bit-field insert/extract opcodes, like BEXTR on x86 [1] or UBFX on ARM [2]. As another commenter points out, IBM is one of the few to reverse this and number bits in a big-endian order on their big-endian processors, with 0 being the most significant. [1] https://www.felixcloutier.com/x86/bextr https://www.felixcloutier.com/x86/bextr [2] https://www.keil.com/support/man/docs/armasm/armasm_dom1361289914598.htm https://www.keil.com/support/man/docs/armasm/armasm_dom13612...