On 10/30/2015 02:23 AM, htio2 wrote:
Generally register pairing is handled by HARD_REGNO_MODE_OK and its related macros. Many targets use register pairs to handle modes larger than their word_size. ie, 64bit moves on 32 bit targets. I recommend looking at other ports to see how that's handled.Hi, how do I constraint the rtx to generate movsi Insn that only use odd 16bits register number (R1, R3, R5 ..) ? for register pairing (e.g R1 and R2 is a pair, R3 and R4 ...) .
Jeff
