• Peter Hutterer's avatar
    test: fix a test failure on ppc64(le) and aarch64 · 72fb6d30
    Peter Hutterer authored
    Caused by different results in -O0 vs -O2. The resulting array differs only
    slightly but the initial sequence has one extra zero. That triggers our
    assert, no other compiler flag seem to be affecting this.
    
    Compiled with -O0:
    Breakpoint 1, test_nonzero_x_linear () at test-bezier.c:157
    157			assert(bezier[x] > bezier[x-1]);
    (gdb) p bezier
    $6 = {0 <repeats 409 times>, 1, 2, 4, 5, 7, 9, 10, 12, 14, 15, 17, 19, 21, 22,
    
    Compiled with -O2:
    (gdb) p bezier
    $1 = {0 <repeats 410 times>, 1, 3, 5, 7, 9, 10, 12, 14, 15, 17, 19, 20, 22,
    
    Printing of the temporary numbers in the decasteljau function shows that a few
    of them are off by one, e.g.
        408.530612/0.836735 with O0, but
        409.510204/0.836735 with O2
    Note: these are not rounding errors caused by the code, the cast to int
    happens afterwards.
    
    Hack around this by allowing for one extra zero before we check that the rest
    of the curve is ascending again.
    
    https://bugs.freedesktop.org/show_bug.cgi?id=99992Signed-off-by: Peter Hutterer's avatarPeter Hutterer <peter.hutterer@who-t.net>
    72fb6d30
Name
Last commit
Last update
..
.gitignore Loading commit data...
Makefile.am Loading commit data...
test-bezier.c Loading commit data...
test-draglock.c Loading commit data...