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Bit assignment statements have the form:
bconc_exp = exp
Where bconc_exp is an expression composed by bit-concatenation operators and operands that should be valid l-values themselves, and exp is an expression whose type must be integral and whose width must correspond exactly to the width of the integral type of bconc_exp.
For example, consider this code:
var a = 0UH; var b = 0UH; a:::b = 0xbeef;
The assignment above updates the value of the variable a
to be
0xbeUH
and the value of the variable b
to be
0xefUH
. Note how the signedness of bconc_exp and
exp may differ.
Any valid l-value can be used as an operand of the bit-concatenation operators in bconc_exp. For example:
var a = [0UH,0UH]; a[0]:::a[1] = 0xbeef;
or, using struct fields:
type Foo = struct { uint<16> hi; uint<16> lo; }; var f = Foo {}; f.hi:::f.lo = 0xbeef;