Author: Armin Rigo <ar...@tunes.org>
Branch:
Changeset: r51643:e82f6594d309
Date: 2012-01-22 12:30 +0100
http://bitbucket.org/pypy/pypy/changeset/e82f6594d309/
Log: Write a test_pypy_c checking that "f ** 2" gets us just a float_mul
operation. (Needs to check if the test really passes or if we are
getting a few extra stuff too.)
diff --git a/pypy/module/pypyjit/test_pypy_c/test_math.py
b/pypy/module/pypyjit/test_pypy_c/test_math.py
--- a/pypy/module/pypyjit/test_pypy_c/test_math.py
+++ b/pypy/module/pypyjit/test_pypy_c/test_math.py
@@ -90,3 +90,18 @@
--TICK--
jump(..., descr=)
""")
+
+ def test_pow_two(self):
+ def main(n):
+ s = 0.123
+ while n > 0:
+ s -= s ** 2 # ID: pow
+ n -= 1
+ return s
+ log = self.run(main, [500])
+ assert abs(log.result - main(500)) < 1e-9
+ loop, = log.loops_by_filename(self.filepath)
+ assert loop.match_by_id("pow", """
+ f2 = float_mul(f1, f1)
+ f3 = float_sub(f1, f2)
+ """)
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