fanqifei wrote: > The instruction sequence generated by gcc can be simply rewritten by > three instructions. > Apparently gcc should find the expression storing to bit-field and use > pattern insv. But it didn't. > > gcc: > 10: 3c03fff3 lui v1,0xfff3 > 14: 3463ffff ori v1,v1,0xffff > 18: 8ca20000 lw v0,0(a1) > 1c: 3c040008 lui a0,0x8 > 20: 00431824 and v1,v0,v1 > 24: 00641825 or v1,v1,a0 > > with ins: > lw v0,0(a1) > ori a0, $0, 2 > ins v0,v0,19,18 I can't see anything in gcc that would use an ins instruction to do that. Andrew.
