VCPU_REGS_R12
gprs[VCPU_REGS_R12] = vcpu->vc_gueststate.vg_r12;
gprs[VCPU_REGS_R12] = vcpu->vc_gueststate.vg_r12;
vcpu->vc_gueststate.vg_r12 = gprs[VCPU_REGS_R12];
vcpu->vc_gueststate.vg_r12 = gprs[VCPU_REGS_R12];
vmsa->v_r12 = gprs[VCPU_REGS_R12];
case VCPU_REGS_R12: return "R12";