micropython: add micropython component

components/language/micropython/tests/float/float_parse.py

@@ -0,0 +1,36 @@
+# test parsing of floats
+
+inf = float("inf")
+
+# it shouldn't matter where the decimal point is if the exponent balances the value
+print(float("1234") - float("0.1234e4"))
+print(float("1.015625") - float("1015625e-6"))
+
+# very large integer part with a very negative exponent should cancel out
+print("%.4e" % float("9" * 60 + "e-60"))
+print("%.4e" % float("9" * 60 + "e-40"))
+
+# many fractional digits
+print(float("." + "9" * 70))
+print(float("." + "9" * 70 + "e20"))
+print(float("." + "9" * 70 + "e-50") == float("1e-50"))
+
+# tiny fraction with large exponent
+print(float("." + "0" * 60 + "1e10") == float("1e-51"))
+print(float("." + "0" * 60 + "9e25") == float("9e-36"))
+print(float("." + "0" * 60 + "9e40") == float("9e-21"))
+
+# ensure that accuracy is retained when value is close to a subnormal
+print(float("1.00000000000000000000e-37"))
+print(float("10.0000000000000000000e-38"))
+print(float("100.000000000000000000e-39"))
+
+# very large exponent literal
+print(float("1e4294967301"))
+print(float("1e-4294967301"))
+print(float("1e18446744073709551621"))
+print(float("1e-18446744073709551621"))
+
+# check small decimals are as close to their true value as possible
+for n in range(1, 10):
+    print(float("0.%u" % n) == n / 10)