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| author | hierophect <hierophect@gmail.com> | 2020-01-29 16:32:08 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-01-29 16:32:08 -0500 |
| commit | 898f4e1f72f52f7f4b87c56010e9b96a8440de63 (patch) | |
| tree | ea9b6cf16b4526dc366213d17dc60193a64a5724 /py/sequence.c | |
| parent | 100409961aa32e84810d6c86309e66277b4ea902 (diff) | |
| parent | 5b6b4eb326ce2f7beca20ccdc81fdef422e45848 (diff) | |
Merge branch 'master' into stm32-meowbit
Diffstat (limited to 'py/sequence.c')
| -rw-r--r-- | py/sequence.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/py/sequence.c b/py/sequence.c index a750e5bac..0e668ea2a 100644 --- a/py/sequence.c +++ b/py/sequence.c @@ -34,6 +34,11 @@ #define SWAP(type, var1, var2) { type t = var2; var2 = var1; var1 = t; } +#if __GNUC__ < 5 +// n.b. does not actually detect overflow! +#define __builtin_mul_overflow(a, b, x) (*(x) = (a) * (b), false) +#endif + // Detect when a multiply causes an overflow. size_t mp_seq_multiply_len(size_t item_sz, size_t len) { size_t new_len; |