crypto: chacha20 - Add a four block SSSE3 variant for x86_64
Extends the x86_64 SSSE3 ChaCha20 implementation by a function processing four ChaCha20 blocks in parallel. This avoids the word shuffling needed in the single block variant, further increasing throughput. For large messages, throughput increases by ~110% compared to single block SSSE3: testing speed of chacha20 (chacha20-simd) encryption test 0 (256 bit key, 16 byte blocks): 43141886 operations in 10 seconds (690270176 bytes) test 1 (256 bit key, 64 byte blocks): 46845874 operations in 10 seconds (2998135936 bytes) test 2 (256 bit key, 256 byte blocks): 18458512 operations in 10 seconds (4725379072 bytes) test 3 (256 bit key, 1024 byte blocks): 5360533 operations in 10 seconds (5489185792 bytes) test 4 (256 bit key, 8192 byte blocks): 692846 operations in 10 seconds (5675794432 bytes) testing speed of chacha20 (chacha20-simd) encryption test 0 (256 bit key, 16 byte blocks): 42249230 operations in 10 seconds (675987680 bytes) test 1 (256 bit key, 64 byte blocks): 46441641 operations in 10 seconds (2972265024 bytes) test 2 (256 bit key, 256 byte blocks): 33028112 operations in 10 seconds (8455196672 bytes) test 3 (256 bit key, 1024 byte blocks): 11568759 operations in 10 seconds (11846409216 bytes) test 4 (256 bit key, 8192 byte blocks): 1448761 operations in 10 seconds (11868250112 bytes) Benchmark results from a Core i5-4670T. Signed-off-by: Martin Willi <martin@strongswan.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Martin Willi
Herbert Xu
Родитель
c9320b6dcb
Коммит
274f938e0a
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@ -16,6 +16,7 @@
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ROT8: .octa 0x0e0d0c0f0a09080b0605040702010003
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ROT16: .octa 0x0d0c0f0e09080b0a0504070601000302
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CTRINC: .octa 0x00000003000000020000000100000000
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.text
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@ -140,3 +141,485 @@ ENTRY(chacha20_block_xor_ssse3)
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ret
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ENDPROC(chacha20_block_xor_ssse3)
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ENTRY(chacha20_4block_xor_ssse3)
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# %rdi: Input state matrix, s
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# %rsi: 4 data blocks output, o
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# %rdx: 4 data blocks input, i
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# This function encrypts four consecutive ChaCha20 blocks by loading the
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# the state matrix in SSE registers four times. As we need some scratch
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# registers, we save the first four registers on the stack. The
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# algorithm performs each operation on the corresponding word of each
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# state matrix, hence requires no word shuffling. For final XORing step
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# we transpose the matrix by interleaving 32- and then 64-bit words,
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# which allows us to do XOR in SSE registers. 8/16-bit word rotation is
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# done with the slightly better performing SSSE3 byte shuffling,
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# 7/12-bit word rotation uses traditional shift+OR.
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sub $0x40,%rsp
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# x0..15[0-3] = s0..3[0..3]
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movq 0x00(%rdi),%xmm1
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pshufd $0x00,%xmm1,%xmm0
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pshufd $0x55,%xmm1,%xmm1
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movq 0x08(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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movq 0x10(%rdi),%xmm5
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pshufd $0x00,%xmm5,%xmm4
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pshufd $0x55,%xmm5,%xmm5
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movq 0x18(%rdi),%xmm7
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pshufd $0x00,%xmm7,%xmm6
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pshufd $0x55,%xmm7,%xmm7
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movq 0x20(%rdi),%xmm9
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pshufd $0x00,%xmm9,%xmm8
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pshufd $0x55,%xmm9,%xmm9
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movq 0x28(%rdi),%xmm11
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pshufd $0x00,%xmm11,%xmm10
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pshufd $0x55,%xmm11,%xmm11
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movq 0x30(%rdi),%xmm13
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pshufd $0x00,%xmm13,%xmm12
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pshufd $0x55,%xmm13,%xmm13
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movq 0x38(%rdi),%xmm15
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pshufd $0x00,%xmm15,%xmm14
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pshufd $0x55,%xmm15,%xmm15
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# x0..3 on stack
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movdqa %xmm0,0x00(%rsp)
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movdqa %xmm1,0x10(%rsp)
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movdqa %xmm2,0x20(%rsp)
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movdqa %xmm3,0x30(%rsp)
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movdqa CTRINC(%rip),%xmm1
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movdqa ROT8(%rip),%xmm2
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movdqa ROT16(%rip),%xmm3
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# x12 += counter values 0-3
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paddd %xmm1,%xmm12
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mov $10,%ecx
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.Ldoubleround4:
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# x0 += x4, x12 = rotl32(x12 ^ x0, 16)
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movdqa 0x00(%rsp),%xmm0
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paddd %xmm4,%xmm0
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movdqa %xmm0,0x00(%rsp)
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pxor %xmm0,%xmm12
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pshufb %xmm3,%xmm12
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# x1 += x5, x13 = rotl32(x13 ^ x1, 16)
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movdqa 0x10(%rsp),%xmm0
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paddd %xmm5,%xmm0
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movdqa %xmm0,0x10(%rsp)
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pxor %xmm0,%xmm13
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pshufb %xmm3,%xmm13
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# x2 += x6, x14 = rotl32(x14 ^ x2, 16)
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movdqa 0x20(%rsp),%xmm0
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paddd %xmm6,%xmm0
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movdqa %xmm0,0x20(%rsp)
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pxor %xmm0,%xmm14
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pshufb %xmm3,%xmm14
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# x3 += x7, x15 = rotl32(x15 ^ x3, 16)
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movdqa 0x30(%rsp),%xmm0
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paddd %xmm7,%xmm0
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movdqa %xmm0,0x30(%rsp)
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pxor %xmm0,%xmm15
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pshufb %xmm3,%xmm15
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# x8 += x12, x4 = rotl32(x4 ^ x8, 12)
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paddd %xmm12,%xmm8
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pxor %xmm8,%xmm4
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movdqa %xmm4,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm4
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por %xmm0,%xmm4
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# x9 += x13, x5 = rotl32(x5 ^ x9, 12)
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paddd %xmm13,%xmm9
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pxor %xmm9,%xmm5
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movdqa %xmm5,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm5
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por %xmm0,%xmm5
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# x10 += x14, x6 = rotl32(x6 ^ x10, 12)
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paddd %xmm14,%xmm10
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pxor %xmm10,%xmm6
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movdqa %xmm6,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm6
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por %xmm0,%xmm6
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# x11 += x15, x7 = rotl32(x7 ^ x11, 12)
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paddd %xmm15,%xmm11
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pxor %xmm11,%xmm7
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movdqa %xmm7,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm7
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por %xmm0,%xmm7
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# x0 += x4, x12 = rotl32(x12 ^ x0, 8)
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movdqa 0x00(%rsp),%xmm0
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paddd %xmm4,%xmm0
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movdqa %xmm0,0x00(%rsp)
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pxor %xmm0,%xmm12
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pshufb %xmm2,%xmm12
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# x1 += x5, x13 = rotl32(x13 ^ x1, 8)
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movdqa 0x10(%rsp),%xmm0
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paddd %xmm5,%xmm0
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movdqa %xmm0,0x10(%rsp)
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pxor %xmm0,%xmm13
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pshufb %xmm2,%xmm13
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# x2 += x6, x14 = rotl32(x14 ^ x2, 8)
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movdqa 0x20(%rsp),%xmm0
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paddd %xmm6,%xmm0
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movdqa %xmm0,0x20(%rsp)
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pxor %xmm0,%xmm14
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pshufb %xmm2,%xmm14
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# x3 += x7, x15 = rotl32(x15 ^ x3, 8)
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movdqa 0x30(%rsp),%xmm0
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paddd %xmm7,%xmm0
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movdqa %xmm0,0x30(%rsp)
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pxor %xmm0,%xmm15
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pshufb %xmm2,%xmm15
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# x8 += x12, x4 = rotl32(x4 ^ x8, 7)
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paddd %xmm12,%xmm8
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pxor %xmm8,%xmm4
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movdqa %xmm4,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm4
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por %xmm0,%xmm4
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# x9 += x13, x5 = rotl32(x5 ^ x9, 7)
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paddd %xmm13,%xmm9
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pxor %xmm9,%xmm5
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movdqa %xmm5,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm5
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por %xmm0,%xmm5
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# x10 += x14, x6 = rotl32(x6 ^ x10, 7)
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paddd %xmm14,%xmm10
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pxor %xmm10,%xmm6
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movdqa %xmm6,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm6
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por %xmm0,%xmm6
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# x11 += x15, x7 = rotl32(x7 ^ x11, 7)
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paddd %xmm15,%xmm11
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pxor %xmm11,%xmm7
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movdqa %xmm7,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm7
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por %xmm0,%xmm7
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# x0 += x5, x15 = rotl32(x15 ^ x0, 16)
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movdqa 0x00(%rsp),%xmm0
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paddd %xmm5,%xmm0
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movdqa %xmm0,0x00(%rsp)
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pxor %xmm0,%xmm15
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pshufb %xmm3,%xmm15
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# x1 += x6, x12 = rotl32(x12 ^ x1, 16)
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movdqa 0x10(%rsp),%xmm0
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paddd %xmm6,%xmm0
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movdqa %xmm0,0x10(%rsp)
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pxor %xmm0,%xmm12
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pshufb %xmm3,%xmm12
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# x2 += x7, x13 = rotl32(x13 ^ x2, 16)
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movdqa 0x20(%rsp),%xmm0
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paddd %xmm7,%xmm0
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movdqa %xmm0,0x20(%rsp)
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pxor %xmm0,%xmm13
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pshufb %xmm3,%xmm13
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# x3 += x4, x14 = rotl32(x14 ^ x3, 16)
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movdqa 0x30(%rsp),%xmm0
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paddd %xmm4,%xmm0
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movdqa %xmm0,0x30(%rsp)
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pxor %xmm0,%xmm14
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pshufb %xmm3,%xmm14
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# x10 += x15, x5 = rotl32(x5 ^ x10, 12)
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paddd %xmm15,%xmm10
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pxor %xmm10,%xmm5
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movdqa %xmm5,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm5
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por %xmm0,%xmm5
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# x11 += x12, x6 = rotl32(x6 ^ x11, 12)
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paddd %xmm12,%xmm11
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pxor %xmm11,%xmm6
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movdqa %xmm6,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm6
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por %xmm0,%xmm6
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# x8 += x13, x7 = rotl32(x7 ^ x8, 12)
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paddd %xmm13,%xmm8
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pxor %xmm8,%xmm7
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movdqa %xmm7,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm7
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por %xmm0,%xmm7
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# x9 += x14, x4 = rotl32(x4 ^ x9, 12)
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paddd %xmm14,%xmm9
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pxor %xmm9,%xmm4
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movdqa %xmm4,%xmm0
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pslld $12,%xmm0
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psrld $20,%xmm4
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por %xmm0,%xmm4
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# x0 += x5, x15 = rotl32(x15 ^ x0, 8)
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movdqa 0x00(%rsp),%xmm0
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paddd %xmm5,%xmm0
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movdqa %xmm0,0x00(%rsp)
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pxor %xmm0,%xmm15
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pshufb %xmm2,%xmm15
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# x1 += x6, x12 = rotl32(x12 ^ x1, 8)
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movdqa 0x10(%rsp),%xmm0
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paddd %xmm6,%xmm0
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movdqa %xmm0,0x10(%rsp)
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pxor %xmm0,%xmm12
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pshufb %xmm2,%xmm12
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# x2 += x7, x13 = rotl32(x13 ^ x2, 8)
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movdqa 0x20(%rsp),%xmm0
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paddd %xmm7,%xmm0
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movdqa %xmm0,0x20(%rsp)
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pxor %xmm0,%xmm13
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pshufb %xmm2,%xmm13
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# x3 += x4, x14 = rotl32(x14 ^ x3, 8)
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movdqa 0x30(%rsp),%xmm0
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paddd %xmm4,%xmm0
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movdqa %xmm0,0x30(%rsp)
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pxor %xmm0,%xmm14
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pshufb %xmm2,%xmm14
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# x10 += x15, x5 = rotl32(x5 ^ x10, 7)
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paddd %xmm15,%xmm10
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pxor %xmm10,%xmm5
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movdqa %xmm5,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm5
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por %xmm0,%xmm5
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# x11 += x12, x6 = rotl32(x6 ^ x11, 7)
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paddd %xmm12,%xmm11
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pxor %xmm11,%xmm6
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movdqa %xmm6,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm6
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por %xmm0,%xmm6
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# x8 += x13, x7 = rotl32(x7 ^ x8, 7)
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paddd %xmm13,%xmm8
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pxor %xmm8,%xmm7
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movdqa %xmm7,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm7
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por %xmm0,%xmm7
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# x9 += x14, x4 = rotl32(x4 ^ x9, 7)
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paddd %xmm14,%xmm9
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pxor %xmm9,%xmm4
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movdqa %xmm4,%xmm0
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pslld $7,%xmm0
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psrld $25,%xmm4
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por %xmm0,%xmm4
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dec %ecx
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jnz .Ldoubleround4
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# x0[0-3] += s0[0]
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# x1[0-3] += s0[1]
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movq 0x00(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd 0x00(%rsp),%xmm2
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movdqa %xmm2,0x00(%rsp)
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paddd 0x10(%rsp),%xmm3
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movdqa %xmm3,0x10(%rsp)
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# x2[0-3] += s0[2]
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# x3[0-3] += s0[3]
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movq 0x08(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd 0x20(%rsp),%xmm2
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movdqa %xmm2,0x20(%rsp)
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paddd 0x30(%rsp),%xmm3
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movdqa %xmm3,0x30(%rsp)
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# x4[0-3] += s1[0]
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# x5[0-3] += s1[1]
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movq 0x10(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm4
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paddd %xmm3,%xmm5
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# x6[0-3] += s1[2]
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# x7[0-3] += s1[3]
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movq 0x18(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm6
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paddd %xmm3,%xmm7
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# x8[0-3] += s2[0]
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# x9[0-3] += s2[1]
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movq 0x20(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm8
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paddd %xmm3,%xmm9
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# x10[0-3] += s2[2]
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# x11[0-3] += s2[3]
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movq 0x28(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm10
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paddd %xmm3,%xmm11
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# x12[0-3] += s3[0]
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# x13[0-3] += s3[1]
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movq 0x30(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm12
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paddd %xmm3,%xmm13
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# x14[0-3] += s3[2]
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# x15[0-3] += s3[3]
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movq 0x38(%rdi),%xmm3
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pshufd $0x00,%xmm3,%xmm2
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pshufd $0x55,%xmm3,%xmm3
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paddd %xmm2,%xmm14
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paddd %xmm3,%xmm15
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# x12 += counter values 0-3
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paddd %xmm1,%xmm12
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# interleave 32-bit words in state n, n+1
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movdqa 0x00(%rsp),%xmm0
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movdqa 0x10(%rsp),%xmm1
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movdqa %xmm0,%xmm2
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punpckldq %xmm1,%xmm2
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punpckhdq %xmm1,%xmm0
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movdqa %xmm2,0x00(%rsp)
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movdqa %xmm0,0x10(%rsp)
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movdqa 0x20(%rsp),%xmm0
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movdqa 0x30(%rsp),%xmm1
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movdqa %xmm0,%xmm2
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punpckldq %xmm1,%xmm2
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punpckhdq %xmm1,%xmm0
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movdqa %xmm2,0x20(%rsp)
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movdqa %xmm0,0x30(%rsp)
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movdqa %xmm4,%xmm0
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punpckldq %xmm5,%xmm4
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punpckhdq %xmm5,%xmm0
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movdqa %xmm0,%xmm5
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movdqa %xmm6,%xmm0
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punpckldq %xmm7,%xmm6
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punpckhdq %xmm7,%xmm0
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movdqa %xmm0,%xmm7
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movdqa %xmm8,%xmm0
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punpckldq %xmm9,%xmm8
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punpckhdq %xmm9,%xmm0
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movdqa %xmm0,%xmm9
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movdqa %xmm10,%xmm0
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punpckldq %xmm11,%xmm10
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punpckhdq %xmm11,%xmm0
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movdqa %xmm0,%xmm11
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movdqa %xmm12,%xmm0
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punpckldq %xmm13,%xmm12
|
||||
punpckhdq %xmm13,%xmm0
|
||||
movdqa %xmm0,%xmm13
|
||||
movdqa %xmm14,%xmm0
|
||||
punpckldq %xmm15,%xmm14
|
||||
punpckhdq %xmm15,%xmm0
|
||||
movdqa %xmm0,%xmm15
|
||||
|
||||
# interleave 64-bit words in state n, n+2
|
||||
movdqa 0x00(%rsp),%xmm0
|
||||
movdqa 0x20(%rsp),%xmm1
|
||||
movdqa %xmm0,%xmm2
|
||||
punpcklqdq %xmm1,%xmm2
|
||||
punpckhqdq %xmm1,%xmm0
|
||||
movdqa %xmm2,0x00(%rsp)
|
||||
movdqa %xmm0,0x20(%rsp)
|
||||
movdqa 0x10(%rsp),%xmm0
|
||||
movdqa 0x30(%rsp),%xmm1
|
||||
movdqa %xmm0,%xmm2
|
||||
punpcklqdq %xmm1,%xmm2
|
||||
punpckhqdq %xmm1,%xmm0
|
||||
movdqa %xmm2,0x10(%rsp)
|
||||
movdqa %xmm0,0x30(%rsp)
|
||||
movdqa %xmm4,%xmm0
|
||||
punpcklqdq %xmm6,%xmm4
|
||||
punpckhqdq %xmm6,%xmm0
|
||||
movdqa %xmm0,%xmm6
|
||||
movdqa %xmm5,%xmm0
|
||||
punpcklqdq %xmm7,%xmm5
|
||||
punpckhqdq %xmm7,%xmm0
|
||||
movdqa %xmm0,%xmm7
|
||||
movdqa %xmm8,%xmm0
|
||||
punpcklqdq %xmm10,%xmm8
|
||||
punpckhqdq %xmm10,%xmm0
|
||||
movdqa %xmm0,%xmm10
|
||||
movdqa %xmm9,%xmm0
|
||||
punpcklqdq %xmm11,%xmm9
|
||||
punpckhqdq %xmm11,%xmm0
|
||||
movdqa %xmm0,%xmm11
|
||||
movdqa %xmm12,%xmm0
|
||||
punpcklqdq %xmm14,%xmm12
|
||||
punpckhqdq %xmm14,%xmm0
|
||||
movdqa %xmm0,%xmm14
|
||||
movdqa %xmm13,%xmm0
|
||||
punpcklqdq %xmm15,%xmm13
|
||||
punpckhqdq %xmm15,%xmm0
|
||||
movdqa %xmm0,%xmm15
|
||||
|
||||
# xor with corresponding input, write to output
|
||||
movdqa 0x00(%rsp),%xmm0
|
||||
movdqu 0x00(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm0
|
||||
movdqu %xmm0,0x00(%rsi)
|
||||
movdqa 0x10(%rsp),%xmm0
|
||||
movdqu 0x80(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm0
|
||||
movdqu %xmm0,0x80(%rsi)
|
||||
movdqa 0x20(%rsp),%xmm0
|
||||
movdqu 0x40(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm0
|
||||
movdqu %xmm0,0x40(%rsi)
|
||||
movdqa 0x30(%rsp),%xmm0
|
||||
movdqu 0xc0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm0
|
||||
movdqu %xmm0,0xc0(%rsi)
|
||||
movdqu 0x10(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm4
|
||||
movdqu %xmm4,0x10(%rsi)
|
||||
movdqu 0x90(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm5
|
||||
movdqu %xmm5,0x90(%rsi)
|
||||
movdqu 0x50(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm6
|
||||
movdqu %xmm6,0x50(%rsi)
|
||||
movdqu 0xd0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm7
|
||||
movdqu %xmm7,0xd0(%rsi)
|
||||
movdqu 0x20(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm8
|
||||
movdqu %xmm8,0x20(%rsi)
|
||||
movdqu 0xa0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm9
|
||||
movdqu %xmm9,0xa0(%rsi)
|
||||
movdqu 0x60(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm10
|
||||
movdqu %xmm10,0x60(%rsi)
|
||||
movdqu 0xe0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm11
|
||||
movdqu %xmm11,0xe0(%rsi)
|
||||
movdqu 0x30(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm12
|
||||
movdqu %xmm12,0x30(%rsi)
|
||||
movdqu 0xb0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm13
|
||||
movdqu %xmm13,0xb0(%rsi)
|
||||
movdqu 0x70(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm14
|
||||
movdqu %xmm14,0x70(%rsi)
|
||||
movdqu 0xf0(%rdx),%xmm1
|
||||
pxor %xmm1,%xmm15
|
||||
movdqu %xmm15,0xf0(%rsi)
|
||||
|
||||
add $0x40,%rsp
|
||||
ret
|
||||
ENDPROC(chacha20_4block_xor_ssse3)
|
||||
|
|
|
|||
|
|
@ -20,12 +20,20 @@
|
|||
#define CHACHA20_STATE_ALIGN 16
|
||||
|
||||
asmlinkage void chacha20_block_xor_ssse3(u32 *state, u8 *dst, const u8 *src);
|
||||
asmlinkage void chacha20_4block_xor_ssse3(u32 *state, u8 *dst, const u8 *src);
|
||||
|
||||
static void chacha20_dosimd(u32 *state, u8 *dst, const u8 *src,
|
||||
unsigned int bytes)
|
||||
{
|
||||
u8 buf[CHACHA20_BLOCK_SIZE];
|
||||
|
||||
while (bytes >= CHACHA20_BLOCK_SIZE * 4) {
|
||||
chacha20_4block_xor_ssse3(state, dst, src);
|
||||
bytes -= CHACHA20_BLOCK_SIZE * 4;
|
||||
src += CHACHA20_BLOCK_SIZE * 4;
|
||||
dst += CHACHA20_BLOCK_SIZE * 4;
|
||||
state[12] += 4;
|
||||
}
|
||||
while (bytes >= CHACHA20_BLOCK_SIZE) {
|
||||
chacha20_block_xor_ssse3(state, dst, src);
|
||||
bytes -= CHACHA20_BLOCK_SIZE;
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче