A5

A5/arithmetic.h

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+/*
+  Arithmetic stuff and simple gates
+*/
+
+#include "wires.h"
+
+// mask out a value if control is false. Otherwise pass through.
+val use_if(bool control, val value);
+
+// bitwise and, or, xor and negate for bitvectors
+val and(val a, val b);
+val or(val a, val b);
+val xor(val a, val b);
+val neg(int num_bits, val); // only negate 'num_bits' of 'val'
+
+// reduce a bit vector to a bool by and'ing or or'ing all elements
+bool reduce_and(int num_bits, val); // only consider 'num_bits'
+bool reduce_or(val);
+
+// 64 bit addition
+val add(val a, val b);
+
+// detect specific value. Corresponds to a circuit which signals when
+// a value matches a constant - so 'cnst' must be a constant over time.
+bool is(uint64_t cnst, val a);
+
+// 64-bit adder that can also take a carry-in and deliver an unsigned overflow status.
+typedef struct {
+    bool cf;
+    val result;
+} generic_adder_result;
+
+generic_adder_result generic_adder(val val_a, val val_b, bool carry_in);
+
+