diff options
Diffstat (limited to 'crypto/p224.cc')
| -rw-r--r-- | crypto/p224.cc | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/crypto/p224.cc b/crypto/p224.cc index 5f76fbc..74ad7e0 100644 --- a/crypto/p224.cc +++ b/crypto/p224.cc @@ -123,6 +123,15 @@ typedef uint64 LargeFieldElement[15]; // ReduceLarge converts a LargeFieldElement to a FieldElement. // // in[i] < 2**62 + +// GCC 4.9 incorrectly vectorizes the first coefficient elimination loop, so +// disable that optimization via pragma. Don't use the pragma under Clang, since +// clang doesn't understand it. +// TODO(wez): Remove this when crbug.com/439566 is fixed. +#if defined(__GNUC__) && !defined(__clang__) +#pragma GCC optimize("no-tree-vectorize") +#endif + void ReduceLarge(FieldElement* out, LargeFieldElement* inptr) { LargeFieldElement& in(*inptr); @@ -164,6 +173,11 @@ void ReduceLarge(FieldElement* out, LargeFieldElement* inptr) { // out[5..7] < 2**28 } +// TODO(wez): Remove this when crbug.com/439566 is fixed. +#if defined(__GNUC__) && !defined(__clang__) +#pragma GCC optimize("tree-vectorize") +#endif + // Mul computes *out = a*b // // a[i] < 2**29, b[i] < 2**30 (or vice versa) |