diff options
| author | Andy Polyakov <appro@openssl.org> | 2016-04-25 23:17:57 +0200 |
|---|---|---|
| committer | Andy Polyakov <appro@openssl.org> | 2016-04-26 21:35:05 +0200 |
| commit | 33ea23dc5c8d20b29b45bb09784ff907386ff4c1 (patch) | |
| tree | 1091074b9e2da3625da4fab2f2eb3ce57293ca54 /crypto/sparcv9cap.c | |
| parent | 7936a86b9f937586d9d80492d9480e11e0f9da39 (diff) | |
SPARCv9 assembly pack: fine-tune run-time switch.
Reviewed-by: Tim Hudson <tjh@openssl.org>
Diffstat (limited to 'crypto/sparcv9cap.c')
| -rw-r--r-- | crypto/sparcv9cap.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/crypto/sparcv9cap.c b/crypto/sparcv9cap.c index 30c384b04d..bcb3592a8b 100644 --- a/crypto/sparcv9cap.c +++ b/crypto/sparcv9cap.c @@ -60,9 +60,18 @@ int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp, if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3)) return bn_mul_mont_vis3(rp, ap, bp, np, n0, num); else if (num >= 8 && - (OPENSSL_sparcv9cap_P[0] & - (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) == - (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) + /* + * bn_mul_mont_fpu doesn't use FMADD, we just use the + * flag to detect when FPU path is preferable in cases + * when current heuristics is unreliable. [it works + * out because FMADD-capable processors where FPU + * code path is undesirable are also VIS3-capable and + * VIS3 code path takes precedence.] + */ + ( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) || + (OPENSSL_sparcv9cap_P[0] & + (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) == + (SPARCV9_PREFER_FPU | SPARCV9_VIS1) )) return bn_mul_mont_fpu(rp, ap, bp, np, n0, num); } return bn_mul_mont_int(rp, ap, bp, np, n0, num); |