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poly1305: fix bug in amd64 assembly

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Add the conditional subtraction of 3 from 'h2' (register R10).

Change-Id: I75615b0375f050a5cd97b968075c2992ccd1dee7
Reviewed-on: https://go-review.googlesource.com/30101
Reviewed-by: Adam Langley <agl@golang.org>
This commit is contained in:
Andreas Auernhammer
2016-10-02 16:48:29 +00:00
committed by Adam Langley
parent 568507f56e
commit 84e98f4576
1 changed files with 1 additions and 0 deletions
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poly1305/poly1305_amd64.s
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@@ -121,6 +121,7 @@ done:
MOVQ R9, BX
SUBQ $0xFFFFFFFFFFFFFFFB, AX
SBBQ $0xFFFFFFFFFFFFFFFF, BX
SBBQ $3, R10
CMOVQCS R8, AX
CMOVQCS R9, BX
ADDQ 16(SP), AX