diff options
author | Benjamin Tissoires <bentiss@kernel.org> | 2024-07-16 12:19:28 +0200 |
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committer | Benjamin Tissoires <bentiss@kernel.org> | 2024-07-16 12:19:28 +0200 |
commit | 3c69140734a27f8b145f12fa0ae80c1fe36a02ca (patch) | |
tree | ad36bf7e6a5400212fbf917eceb4c7ad4df5d557 /lib/test_fpu_impl.c | |
parent | 5ba28be6be8ac6cd4fa1ac67cd4da237d39917d2 (diff) | |
parent | 8a25418ba65a5d2494b369f6178a284c449bc399 (diff) |
Merge branch 'for-6.11/trivial' into for-linus
Couple of trivial fixes:
- extra semicolon (Chen Ni)
- typo (Thorsten Blum)
Diffstat (limited to 'lib/test_fpu_impl.c')
-rw-r--r-- | lib/test_fpu_impl.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/lib/test_fpu_impl.c b/lib/test_fpu_impl.c new file mode 100644 index 000000000000..777894dbbe86 --- /dev/null +++ b/lib/test_fpu_impl.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/errno.h> + +#include "test_fpu.h" + +int test_fpu(void) +{ + /* + * This sequence of operations tests that rounding mode is + * to nearest and that denormal numbers are supported. + * Volatile variables are used to avoid compiler optimizing + * the calculations away. + */ + volatile double a, b, c, d, e, f, g; + + a = 4.0; + b = 1e-15; + c = 1e-310; + + /* Sets precision flag */ + d = a + b; + + /* Result depends on rounding mode */ + e = a + b / 2; + + /* Denormal and very large values */ + f = b / c; + + /* Depends on denormal support */ + g = a + c * f; + + if (d > a && e > a && g > a) + return 0; + else + return -EINVAL; +} |