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| author | Niels Möller <nisse@lysator.liu.se> | 2013-03-06 15:51:55 +0100 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2013-03-06 15:51:55 +0100 |
| commit | 12fe3cc1eb61174d8ab5c3d6768e9bdd4c61317b (patch) | |
| tree | e64249e2ca57044ad1c4ffffdb30c19010bbae5c | |
| parent | 8500c6e01195ff591a15101518da41421ccb1102 (diff) | |
| download | nettle-12fe3cc1eb61174d8ab5c3d6768e9bdd4c61317b.tar.gz | |
Comment fixes.
| -rw-r--r-- | armv7/ecc-384-modp.asm | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/armv7/ecc-384-modp.asm b/armv7/ecc-384-modp.asm index e34d95f8..fb5a6e12 100644 --- a/armv7/ecc-384-modp.asm +++ b/armv7/ecc-384-modp.asm @@ -153,7 +153,7 @@ PROLOGUE(nettle_ecc_384_modp) C Fold high limbs, we need to add in C - C F4 F4 -F4 F4 H H -H H + C F4 F4 0 -F4 F4 H H 0 -H H C C We always have F4 >= 0, but we can have H < 0. C Sign extension gets tricky when F4 = 0 and H < 0. @@ -163,7 +163,7 @@ PROLOGUE(nettle_ecc_384_modp) C H H 0 -H H C ---------------- - C S F4 F3 F2 F1 F0 + C S H F3 F2 F1 F0 C C Define S = H >> 31 (asr), we then have C @@ -171,7 +171,7 @@ PROLOGUE(nettle_ecc_384_modp) C F1 = S - H C F2 = - [H > 0] C F3 = H - [H > 0] - C F4 = H + S + C H = H + S C C And we get underflow in S - H iff H > 0 |