Differences

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--- language:langs:chp [2023/04/09 23:26] – [Conditional execution] rajit
+++ language:langs:chp [2024/07/20 16:36] (current) – [Advanced expression syntax] rajit
@@ Line 110: / Line 110: @@
 }
 </code>
-uses ''x'' with an index that is computed using the run-time value of ''i''. This second category of arrays are referred to as //dynamic arrays//---not because the array size is dynamic, but because the element of the array accessed depends on a value that is computed by the circuit.
+uses ''x'' with an index that is computed using the run-time value of ''i''. This second category of arrays are referred to as //dynamic arrays//---not because the array size is dynamic, but because the element of the array accessed depends on a value that is computed by the circuit.  Such dynamic arrays have to be translated into memory structures, or other circuits where the element being accessed has to be specified at run-time. Arrays with constant references can be directly mapped to circuit implementations of asynchronous registers, since the element to be accessed can be determined statically.
@@ Line 156: / Line 156: @@
 ===== Advanced expression syntax =====
+==== Bitslice assignment ====
+For integer-valued variables, one can assign to some of the bits. The syntax for this is:
+<code act>
+ int<8> x;
+ ...
+ chp {
+   ...
+    x{4..2} := 4;
+   ...
+ }
+</code>
+This will update three bits of ''x'' based on the bit-pattern of the right hand side (in this case ''100'').
 ==== Channels in expressions ====