split off codgen functions into a separate module. have working ec ops

scripts/codegen.py

@@ -0,0 +1,31 @@
+# Functions here are called from pism.py using getattr()
+# and the function name as a string.
+
+def witness(line, out, point):
+    return \
+r"""let %s = ecc::EdwardsPoint::witness(
+    cs.namespace(|| "%s"),
+    %s.map(jubjub::ExtendedPoint::from))?;""" % (out, line, point)
+
+def assert_not_small_order(line, point):
+    return '%s.assert_not_small_order(cs.namespace(|| "%s"))?;' % (point, line)
+
+def fr_as_binary_le(line, out, fr):
+    return \
+r"""let %s = boolean::field_into_boolean_vec_le(
+    cs.namespace(|| "%s"), %s)?;""" % (out, line, fr)
+
+def ec_mul_const(line, out, fr, base):
+    return \
+r"""let %s = ecc::fixed_base_multiplication(
+    cs.namespace(|| "%s"),
+    &%s,
+    &%s,
+)?;""" % (out, line, base, fr)
+
+def ec_add(line, out, a, b):
+    return 'let %s = %s.add(cs.namespace(|| "%s"), &%s)?;' % (out, a, line, b)
+
+def emit_ec(line, point):
+    return '%s.inputize(cs.namespace(|| "%s"))?;' % (point, line)
+