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The toggle can have default state of zero, and then non-zero means second nybble is processed. That allows to skip initialization of toggle, and save 4 bytes. But then we cannot create value 1 with 4-byte instruction. But we can get something out of this situation: we can initialize R11 to 0x1101, and R15 to 0xF, and then we can get 0x1100 with MUX: MUX R0 R15 R11 R8 ; 0x1100 = ((0x1101 & ~0xF) | (0 | 0xF)) And we will also have value 0xF in R15. 0xF is used twice as immediate thus we save another 4 bytes by using non-immediate instructions two times We save 6 bytes overall. (We lose 2 bytes because we use immediate load to R15)
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|stage0_monitor.hex0||3 years ago|
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