+ case OP_META_EXTC:
+ if (known & BIT(c.i.rs)) {
+ known |= BIT(c.i.rt);
+ v[c.i.rt] = (s32)(s8)v[c.i.rs];
+ } else {
+ known &= ~BIT(c.i.rt);
+ }
+ break;
+ case OP_META_EXTS:
+ if (known & BIT(c.i.rs)) {
+ known |= BIT(c.i.rt);
+ v[c.i.rt] = (s32)(s16)v[c.i.rs];
+ } else {
+ known &= ~BIT(c.i.rt);
+ }
+ break;