_R31
instrs[i++] = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
instrs[i++] = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
instrs[i++] = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
instrs[i++] = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
instrs[i++] = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
instr = PPC_RAW_ORI(_R31, _R31, 0); /* speculation barrier */
ctx->b2p[TMP_REG] = _R31; /* 32 bits */
EMIT(PPC_RAW_ORI(_R31, _R31, 0));
EMIT(PPC_RAW_ORI(_R31, _R31, 0));
ctx->b2p[BPF_REG_FP] = _R31;