ORC_REG_PREV_SP
.fp_reg = ORC_REG_PREV_SP,
.ra_reg = ORC_REG_PREV_SP,
case ORC_REG_PREV_SP:
if (orc->ra_reg == ORC_REG_PREV_SP) {
.bp_reg = ORC_REG_PREV_SP,
case ORC_REG_PREV_SP:
case ORC_REG_PREV_SP:
orc->fp_reg = ORC_REG_PREV_SP;
orc->ra_reg = ORC_REG_PREV_SP;
case ORC_REG_PREV_SP:
orc->bp_reg = ORC_REG_PREV_SP;