a: move s0,r10 move s1,r9 move s1,r8 move s2,r7 move s2,r6 move s3,r5 move s3,r4 move s4,r3 move s4,r2 move s8,r1 move s9,r0 move s8,r15 move s9,r14 move s10,r13 move s15,r11 b: move r9,s0 move r10,s1 move r7,s1 move r8,s2 move r5,s2 move r6,s3 move r3,s3 move r4,s4 move r1,s4 move r0,s8 move r15,s9 move r2,s8 move r13,s9 move r11,s10 move r14,s15