ptx-90-parser 0.4.4

Parse NVIDIA PTX 9.0 assembly into a structured AST and explore modules via a CLI.
Documentation 
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### Description

Perform scalar arithmetic operation with optional saturate, and optional secondary arithmetic operation or subword data merge.

### Syntax

```
// 32-bit scalar operation, with optional secondary operation
vop.dtype.atype.btype{.sat}       d, a{.asel}, b{.bsel};
vop.dtype.atype.btype{.sat}.op2   d, a{.asel}, b{.bsel}, c;

// 32-bit scalar operation, with optional data merge
vop.dtype.atype.btype{.sat}  d.dsel, a{.asel}, b{.bsel}, c;

 vop   = { vadd, vsub, vabsdiff, vmin, vmax };
.dtype = .atype = .btype = { .u32, .s32 };
.dsel  = .asel  = .bsel  = { .b0, .b1, .b2, .b3, .h0, .h1 };
.op2   = { .add, .min, .max };
```

### Semantics

```
// extract byte/half-word/word and sign- or zero-extend
// based on source operand type
ta = partSelectSignExtend( a, atype, asel );
tb = partSelectSignExtend( b, btype, bsel );

switch ( vop ) {
    case vadd:     tmp = ta + tb;
    case vsub:     tmp = ta - tb;
    case vabsdiff: tmp = | ta - tb |;
    case vmin:     tmp = MIN( ta, tb );
    case vmax:     tmp = MAX( ta, tb );
}
// saturate, taking into account destination type and merge operations
tmp = optSaturate( tmp, sat, isSigned(dtype), dsel );
d = optSecondaryOp( op2, tmp, c );  // optional secondary operation
d = optMerge( dsel, tmp, c );       // optional merge with c operand
```

### Examples

```
vadd.s32.u32.s32.sat      r1, r2.b0, r3.h0;
vsub.s32.s32.u32.sat      r1, r2.h1, r3.h1;
vabsdiff.s32.s32.s32.sat  r1.h0, r2.b0, r3.b2, c;
vmin.s32.s32.s32.sat.add  r1, r2, r3, c;
```