| 1319 | // zero/sign extend. "i" is limited to either classic unsigned (min==0) or |
| 1320 | // classic signed (min=minus-power-of-2); max=power-of-2-minus-1. |
| 1321 | private Node zsMask(Node val, Type t ) { |
| 1322 | if( !(val._type instanceof TypeInteger tval && t instanceof TypeInteger t0 && !tval.isa(t0)) ) { |
| 1323 | if( !(val._type instanceof TypeFloat tval && t instanceof TypeFloat t0 && !tval.isa(t0)) ) |
| 1324 | return val; |
| 1325 | // Float rounding |
| 1326 | return peep(new RoundF32Node(val)); |
| 1327 | } |
| 1328 | if( t0._min==0 ) // Unsigned |
| 1329 | return peep(new AndNode(null,val,con(t0._max))); |
| 1330 | // Signed extension |
| 1331 | int shift = Long.numberOfLeadingZeros(t0._max)-1; |
| 1332 | Node shf = con(shift); |
| 1333 | if( shf._type==TypeInteger.ZERO ) |
| 1334 | return val; |
| 1335 | return peep(new SarNode(null,peep(new ShlNode(null,val,shf.keep())),shf.unkeep())); |
| 1336 | } |
| 1337 | |
| 1338 | /** |
| 1339 | * Parse a function body; the caller will parse the surrounding "{}" |