Commit e377bedb authored by Dave Watson's avatar Dave Watson Committed by Herbert Xu
Browse files

crypto: aesni - Add GCM_COMPLETE macro 



Merge encode and decode tag calculations in GCM_COMPLETE macro.
Scatter/gather routines will call this once at the end of encryption
or decryption.

Signed-off-by: default avatarDave Watson <davejwatson@fb.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 5350b0f5

arch/x86/crypto/aesni-intel_avx-x86_64.S

+8 −0
Original line number Diff line number Diff line
@@ -510,6 +510,14 @@ _less_than_8_bytes_left\@: 
        #############################



_multiple_of_16_bytes\@:

        GCM_COMPLETE \GHASH_MUL \REP

.endm





# GCM_COMPLETE Finishes update of tag of last partial block

# Output: Authorization Tag (AUTH_TAG)

# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15

.macro GCM_COMPLETE GHASH_MUL REP

        mov     arg8, %r12                           # r12 = aadLen (number of bytes)

        shl     $3, %r12                             # convert into number of bits

        vmovd   %r12d, %xmm15                        # len(A) in xmm15

CRA Git | Maintained and supported by SUSTech CRA and CCSE