From f9b1d64678607e132051d232c7a2127f32947d64 Mon Sep 17 00:00:00 2001 From: Dave Watson Date: Mon, 10 Dec 2018 19:56:45 +0000 Subject: crypto: aesni - Merge GCM_ENC_DEC The GCM_ENC_DEC routines for AVX and AVX2 are identical, except they call separate sub-macros. Pass the macros as arguments, and merge them. This facilitates additional refactoring, by requiring changes in only one place. The GCM_ENC_DEC macro was moved above the CONFIG_AS_AVX* ifdefs, since it will be used by both AVX and AVX2. Signed-off-by: Dave Watson Signed-off-by: Herbert Xu --- arch/x86/crypto/aesni-intel_avx-x86_64.S | 2481 +++++++++++++----------------- 1 file changed, 1083 insertions(+), 1398 deletions(-) (limited to 'arch/x86') diff --git a/arch/x86/crypto/aesni-intel_avx-x86_64.S b/arch/x86/crypto/aesni-intel_avx-x86_64.S index 1985ea0b551b..318135a77975 100644 --- a/arch/x86/crypto/aesni-intel_avx-x86_64.S +++ b/arch/x86/crypto/aesni-intel_avx-x86_64.S @@ -280,1252 +280,1250 @@ VARIABLE_OFFSET = 16*8 vaesenclast 16*10(arg1), \XMM0, \XMM0 .endm -#ifdef CONFIG_AS_AVX -############################################################################### -# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0) -# Input: A and B (128-bits each, bit-reflected) -# Output: C = A*B*x mod poly, (i.e. >>1 ) -# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input -# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly. -############################################################################### -.macro GHASH_MUL_AVX GH HK T1 T2 T3 T4 T5 +# combined for GCM encrypt and decrypt functions +# clobbering all xmm registers +# clobbering r10, r11, r12, r13, r14, r15 +.macro GCM_ENC_DEC INITIAL_BLOCKS GHASH_8_ENCRYPT_8_PARALLEL GHASH_LAST_8 GHASH_MUL ENC_DEC - vpshufd $0b01001110, \GH, \T2 - vpshufd $0b01001110, \HK, \T3 - vpxor \GH , \T2, \T2 # T2 = (a1+a0) - vpxor \HK , \T3, \T3 # T3 = (b1+b0) + #the number of pushes must equal STACK_OFFSET + push %r12 + push %r13 + push %r14 + push %r15 - vpclmulqdq $0x11, \HK, \GH, \T1 # T1 = a1*b1 - vpclmulqdq $0x00, \HK, \GH, \GH # GH = a0*b0 - vpclmulqdq $0x00, \T3, \T2, \T2 # T2 = (a1+a0)*(b1+b0) - vpxor \GH, \T2,\T2 - vpxor \T1, \T2,\T2 # T2 = a0*b1+a1*b0 + mov %rsp, %r14 - vpslldq $8, \T2,\T3 # shift-L T3 2 DWs - vpsrldq $8, \T2,\T2 # shift-R T2 2 DWs - vpxor \T3, \GH, \GH - vpxor \T2, \T1, \T1 # = GH x HK - #first phase of the reduction - vpslld $31, \GH, \T2 # packed right shifting << 31 - vpslld $30, \GH, \T3 # packed right shifting shift << 30 - vpslld $25, \GH, \T4 # packed right shifting shift << 25 - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 - vpsrldq $4, \T2, \T5 # shift-R T5 1 DW + sub $VARIABLE_OFFSET, %rsp + and $~63, %rsp # align rsp to 64 bytes - vpslldq $12, \T2, \T2 # shift-L T2 3 DWs - vpxor \T2, \GH, \GH # first phase of the reduction complete - #second phase of the reduction + vmovdqu HashKey(arg1), %xmm13 # xmm13 = HashKey - vpsrld $1,\GH, \T2 # packed left shifting >> 1 - vpsrld $2,\GH, \T3 # packed left shifting >> 2 - vpsrld $7,\GH, \T4 # packed left shifting >> 7 - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 + mov arg4, %r13 # save the number of bytes of plaintext/ciphertext + and $-16, %r13 # r13 = r13 - (r13 mod 16) - vpxor \T5, \T2, \T2 - vpxor \T2, \GH, \GH - vpxor \T1, \GH, \GH # the result is in GH + mov %r13, %r12 + shr $4, %r12 + and $7, %r12 + jz _initial_num_blocks_is_0\@ + cmp $7, %r12 + je _initial_num_blocks_is_7\@ + cmp $6, %r12 + je _initial_num_blocks_is_6\@ + cmp $5, %r12 + je _initial_num_blocks_is_5\@ + cmp $4, %r12 + je _initial_num_blocks_is_4\@ + cmp $3, %r12 + je _initial_num_blocks_is_3\@ + cmp $2, %r12 + je _initial_num_blocks_is_2\@ -.endm + jmp _initial_num_blocks_is_1\@ -.macro PRECOMPUTE_AVX HK T1 T2 T3 T4 T5 T6 +_initial_num_blocks_is_7\@: + \INITIAL_BLOCKS 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*7, %r13 + jmp _initial_blocks_encrypted\@ - # Haskey_i_k holds XORed values of the low and high parts of the Haskey_i - vmovdqa \HK, \T5 +_initial_num_blocks_is_6\@: + \INITIAL_BLOCKS 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*6, %r13 + jmp _initial_blocks_encrypted\@ - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_k(arg1) +_initial_num_blocks_is_5\@: + \INITIAL_BLOCKS 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*5, %r13 + jmp _initial_blocks_encrypted\@ - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly - vmovdqa \T5, HashKey_2(arg1) # [HashKey_2] = HashKey^2<<1 mod poly - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_2_k(arg1) +_initial_num_blocks_is_4\@: + \INITIAL_BLOCKS 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*4, %r13 + jmp _initial_blocks_encrypted\@ - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly - vmovdqa \T5, HashKey_3(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_3_k(arg1) +_initial_num_blocks_is_3\@: + \INITIAL_BLOCKS 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*3, %r13 + jmp _initial_blocks_encrypted\@ - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly - vmovdqa \T5, HashKey_4(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_4_k(arg1) +_initial_num_blocks_is_2\@: + \INITIAL_BLOCKS 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*2, %r13 + jmp _initial_blocks_encrypted\@ - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly - vmovdqa \T5, HashKey_5(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_5_k(arg1) +_initial_num_blocks_is_1\@: + \INITIAL_BLOCKS 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + sub $16*1, %r13 + jmp _initial_blocks_encrypted\@ - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly - vmovdqa \T5, HashKey_6(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_6_k(arg1) +_initial_num_blocks_is_0\@: + \INITIAL_BLOCKS 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly - vmovdqa \T5, HashKey_7(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_7_k(arg1) - GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly - vmovdqa \T5, HashKey_8(arg1) - vpshufd $0b01001110, \T5, \T1 - vpxor \T5, \T1, \T1 - vmovdqa \T1, HashKey_8_k(arg1) +_initial_blocks_encrypted\@: + cmp $0, %r13 + je _zero_cipher_left\@ -.endm + sub $128, %r13 + je _eight_cipher_left\@ -## if a = number of total plaintext bytes -## b = floor(a/16) -## num_initial_blocks = b mod 4# -## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext -## r10, r11, r12, rax are clobbered -## arg1, arg2, arg3, r14 are used as a pointer only, not modified -.macro INITIAL_BLOCKS_AVX num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC - i = (8-\num_initial_blocks) - j = 0 - setreg - mov arg6, %r10 # r10 = AAD - mov arg7, %r12 # r12 = aadLen + vmovd %xmm9, %r15d + and $255, %r15d + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - mov %r12, %r11 - vpxor reg_j, reg_j, reg_j - vpxor reg_i, reg_i, reg_i - cmp $16, %r11 - jl _get_AAD_rest8\@ -_get_AAD_blocks\@: - vmovdqu (%r10), reg_i - vpshufb SHUF_MASK(%rip), reg_i, reg_i - vpxor reg_i, reg_j, reg_j - GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 - add $16, %r10 - sub $16, %r12 - sub $16, %r11 - cmp $16, %r11 - jge _get_AAD_blocks\@ - vmovdqu reg_j, reg_i - cmp $0, %r11 - je _get_AAD_done\@ +_encrypt_by_8_new\@: + cmp $(255-8), %r15d + jg _encrypt_by_8\@ - vpxor reg_i, reg_i, reg_i - /* read the last <16B of AAD. since we have at least 4B of - data right after the AAD (the ICV, and maybe some CT), we can - read 4B/8B blocks safely, and then get rid of the extra stuff */ -_get_AAD_rest8\@: - cmp $4, %r11 - jle _get_AAD_rest4\@ - movq (%r10), \T1 - add $8, %r10 - sub $8, %r11 - vpslldq $8, \T1, \T1 - vpsrldq $8, reg_i, reg_i - vpxor \T1, reg_i, reg_i - jmp _get_AAD_rest8\@ -_get_AAD_rest4\@: - cmp $0, %r11 - jle _get_AAD_rest0\@ - mov (%r10), %eax - movq %rax, \T1 - add $4, %r10 - sub $4, %r11 - vpslldq $12, \T1, \T1 - vpsrldq $4, reg_i, reg_i - vpxor \T1, reg_i, reg_i -_get_AAD_rest0\@: - /* finalize: shift out the extra bytes we read, and align - left. since pslldq can only shift by an immediate, we use - vpshufb and an array of shuffle masks */ - movq %r12, %r11 - salq $4, %r11 - movdqu aad_shift_arr(%r11), \T1 - vpshufb \T1, reg_i, reg_i -_get_AAD_rest_final\@: - vpshufb SHUF_MASK(%rip), reg_i, reg_i - vpxor reg_j, reg_i, reg_i - GHASH_MUL_AVX reg_i, \T2, \T1, \T3, \T4, \T5, \T6 -_get_AAD_done\@: - # initialize the data pointer offset as zero - xor %r11d, %r11d + add $8, %r15b + \GHASH_8_ENCRYPT_8_PARALLEL %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC + add $128, %r11 + sub $128, %r13 + jne _encrypt_by_8_new\@ - # start AES for num_initial_blocks blocks - mov arg5, %rax # rax = *Y0 - vmovdqu (%rax), \CTR # CTR = Y0 - vpshufb SHUF_MASK(%rip), \CTR, \CTR + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + jmp _eight_cipher_left\@ +_encrypt_by_8\@: + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + add $8, %r15b + \GHASH_8_ENCRYPT_8_PARALLEL %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + add $128, %r11 + sub $128, %r13 + jne _encrypt_by_8_new\@ - i = (9-\num_initial_blocks) - setreg -.rep \num_initial_blocks - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, reg_i - vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap - i = (i+1) - setreg -.endr + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - vmovdqa (arg1), \T_key - i = (9-\num_initial_blocks) - setreg -.rep \num_initial_blocks - vpxor \T_key, reg_i, reg_i - i = (i+1) - setreg -.endr - j = 1 - setreg -.rep 9 - vmovdqa 16*j(arg1), \T_key - i = (9-\num_initial_blocks) - setreg -.rep \num_initial_blocks - vaesenc \T_key, reg_i, reg_i - i = (i+1) - setreg -.endr - j = (j+1) - setreg -.endr - - - vmovdqa 16*10(arg1), \T_key - i = (9-\num_initial_blocks) - setreg -.rep \num_initial_blocks - vaesenclast \T_key, reg_i, reg_i - i = (i+1) - setreg -.endr - i = (9-\num_initial_blocks) - setreg -.rep \num_initial_blocks - vmovdqu (arg3, %r11), \T1 - vpxor \T1, reg_i, reg_i - vmovdqu reg_i, (arg2 , %r11) # write back ciphertext for num_initial_blocks blocks - add $16, %r11 -.if \ENC_DEC == DEC - vmovdqa \T1, reg_i -.endif - vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations - i = (i+1) - setreg -.endr +_eight_cipher_left\@: + \GHASH_LAST_8 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8 - i = (8-\num_initial_blocks) - j = (9-\num_initial_blocks) - setreg +_zero_cipher_left\@: + cmp $16, arg4 + jl _only_less_than_16\@ -.rep \num_initial_blocks - vpxor reg_i, reg_j, reg_j - GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks - i = (i+1) - j = (j+1) - setreg -.endr - # XMM8 has the combined result here + mov arg4, %r13 + and $15, %r13 # r13 = (arg4 mod 16) - vmovdqa \XMM8, TMP1(%rsp) - vmovdqa \XMM8, \T3 + je _multiple_of_16_bytes\@ - cmp $128, %r13 - jl _initial_blocks_done\@ # no need for precomputed constants + # handle the last <16 Byte block seperately -############################################################################### -# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM1 - vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM2 - vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap + vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM3 - vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap + sub $16, %r11 + add %r13, %r11 + vmovdqu (arg3, %r11), %xmm1 # receive the last <16 Byte block - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM4 - vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap + lea SHIFT_MASK+16(%rip), %r12 + sub %r13, %r12 # adjust the shuffle mask pointer to be + # able to shift 16-r13 bytes (r13 is the + # number of bytes in plaintext mod 16) + vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask + vpshufb %xmm2, %xmm1, %xmm1 # shift right 16-r13 bytes + jmp _final_ghash_mul\@ - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM5 - vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap +_only_less_than_16\@: + # check for 0 length + mov arg4, %r13 + and $15, %r13 # r13 = (arg4 mod 16) - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM6 - vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap + je _multiple_of_16_bytes\@ - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM7 - vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap + # handle the last <16 Byte block separately - vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 - vmovdqa \CTR, \XMM8 - vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap - vmovdqa (arg1), \T_key - vpxor \T_key, \XMM1, \XMM1 - vpxor \T_key, \XMM2, \XMM2 - vpxor \T_key, \XMM3, \XMM3 - vpxor \T_key, \XMM4, \XMM4 - vpxor \T_key, \XMM5, \XMM5 - vpxor \T_key, \XMM6, \XMM6 - vpxor \T_key, \XMM7, \XMM7 - vpxor \T_key, \XMM8, \XMM8 + vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) - i = 1 - setreg -.rep 9 # do 9 rounds - vmovdqa 16*i(arg1), \T_key - vaesenc \T_key, \XMM1, \XMM1 - vaesenc \T_key, \XMM2, \XMM2 - vaesenc \T_key, \XMM3, \XMM3 - vaesenc \T_key, \XMM4, \XMM4 - vaesenc \T_key, \XMM5, \XMM5 - vaesenc \T_key, \XMM6, \XMM6 - vaesenc \T_key, \XMM7, \XMM7 - vaesenc \T_key, \XMM8, \XMM8 - i = (i+1) - setreg -.endr + lea SHIFT_MASK+16(%rip), %r12 + sub %r13, %r12 # adjust the shuffle mask pointer to be + # able to shift 16-r13 bytes (r13 is the + # number of bytes in plaintext mod 16) - vmovdqa 16*i(arg1), \T_key - vaesenclast \T_key, \XMM1, \XMM1 - vaesenclast \T_key, \XMM2, \XMM2 - vaesenclast \T_key, \XMM3, \XMM3 - vaesenclast \T_key, \XMM4, \XMM4 - vaesenclast \T_key, \XMM5, \XMM5 - vaesenclast \T_key, \XMM6, \XMM6 - vaesenclast \T_key, \XMM7, \XMM7 - vaesenclast \T_key, \XMM8, \XMM8 +_get_last_16_byte_loop\@: + movb (arg3, %r11), %al + movb %al, TMP1 (%rsp , %r11) + add $1, %r11 + cmp %r13, %r11 + jne _get_last_16_byte_loop\@ - vmovdqu (arg3, %r11), \T1 - vpxor \T1, \XMM1, \XMM1 - vmovdqu \XMM1, (arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM1 - .endif + vmovdqu TMP1(%rsp), %xmm1 - vmovdqu 16*1(arg3, %r11), \T1 - vpxor \T1, \XMM2, \XMM2 - vmovdqu \XMM2, 16*1(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM2 - .endif + sub $16, %r11 - vmovdqu 16*2(arg3, %r11), \T1 - vpxor \T1, \XMM3, \XMM3 - vmovdqu \XMM3, 16*2(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM3 - .endif +_final_ghash_mul\@: + .if \ENC_DEC == DEC + vmovdqa %xmm1, %xmm2 + vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) + vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to + # mask out top 16-r13 bytes of xmm9 + vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 + vpand %xmm1, %xmm2, %xmm2 + vpshufb SHUF_MASK(%rip), %xmm2, %xmm2 + vpxor %xmm2, %xmm14, %xmm14 + #GHASH computation for the last <16 Byte block + \GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 + sub %r13, %r11 + add $16, %r11 + .else + vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) + vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to + # mask out top 16-r13 bytes of xmm9 + vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + vpxor %xmm9, %xmm14, %xmm14 + #GHASH computation for the last <16 Byte block + \GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 + sub %r13, %r11 + add $16, %r11 + vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext + .endif - vmovdqu 16*3(arg3, %r11), \T1 - vpxor \T1, \XMM4, \XMM4 - vmovdqu \XMM4, 16*3(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM4 - .endif - vmovdqu 16*4(arg3, %r11), \T1 - vpxor \T1, \XMM5, \XMM5 - vmovdqu \XMM5, 16*4(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM5 - .endif + ############################# + # output r13 Bytes + vmovq %xmm9, %rax + cmp $8, %r13 + jle _less_than_8_bytes_left\@ - vmovdqu 16*5(arg3, %r11), \T1 - vpxor \T1, \XMM6, \XMM6 - vmovdqu \XMM6, 16*5(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM6 - .endif + mov %rax, (arg2 , %r11) + add $8, %r11 + vpsrldq $8, %xmm9, %xmm9 + vmovq %xmm9, %rax + sub $8, %r13 - vmovdqu 16*6(arg3, %r11), \T1 - vpxor \T1, \XMM7, \XMM7 - vmovdqu \XMM7, 16*6(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM7 - .endif +_less_than_8_bytes_left\@: + movb %al, (arg2 , %r11) + add $1, %r11 + shr $8, %rax + sub $1, %r13 + jne _less_than_8_bytes_left\@ + ############################# - vmovdqu 16*7(arg3, %r11), \T1 - vpxor \T1, \XMM8, \XMM8 - vmovdqu \XMM8, 16*7(arg2 , %r11) - .if \ENC_DEC == DEC - vmovdqa \T1, \XMM8 - .endif +_multiple_of_16_bytes\@: + mov arg7, %r12 # r12 = aadLen (number of bytes) + shl $3, %r12 # convert into number of bits + vmovd %r12d, %xmm15 # len(A) in xmm15 - add $128, %r11 + shl $3, arg4 # len(C) in bits (*128) + vmovq arg4, %xmm1 + vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000 + vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C) - vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap - vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with the corresponding ciphertext - vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap + vpxor %xmm15, %xmm14, %xmm14 + \GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation + vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap -############################################################################### + mov arg5, %rax # rax = *Y0 + vmovdqu (%rax), %xmm9 # xmm9 = Y0 -_initial_blocks_done\@: + ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Y0) -.endm + vpxor %xmm14, %xmm9, %xmm9 -# encrypt 8 blocks at a time -# ghash the 8 previously encrypted ciphertext blocks -# arg1, arg2, arg3 are used as pointers only, not modified -# r11 is the data offset value -.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC - vmovdqa \XMM1, \T2 - vmovdqa \XMM2, TMP2(%rsp) - vmovdqa \XMM3, TMP3(%rsp) - vmovdqa \XMM4, TMP4(%rsp) - vmovdqa \XMM5, TMP5(%rsp) - vmovdqa \XMM6, TMP6(%rsp) - vmovdqa \XMM7, TMP7(%rsp) - vmovdqa \XMM8, TMP8(%rsp) -.if \loop_idx == in_order - vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT - vpaddd ONE(%rip), \XMM1, \XMM2 - vpaddd ONE(%rip), \XMM2, \XMM3 - vpaddd ONE(%rip), \XMM3, \XMM4 - vpaddd ONE(%rip), \XMM4, \XMM5 - vpaddd ONE(%rip), \XMM5, \XMM6 - vpaddd ONE(%rip), \XMM6, \XMM7 - vpaddd ONE(%rip), \XMM7, \XMM8 - vmovdqa \XMM8, \CTR +_return_T\@: + mov arg8, %r10 # r10 = authTag + mov arg9, %r11 # r11 = auth_tag_len - vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap -.else - vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT - vpaddd ONEf(%rip), \XMM1, \XMM2 - vpaddd ONEf(%rip), \XMM2, \XMM3 - vpaddd ONEf(%rip), \XMM3, \XMM4 - vpaddd ONEf(%rip), \XMM4, \XMM5 - vpaddd ONEf(%rip), \XMM5, \XMM6 - vpaddd ONEf(%rip), \XMM6, \XMM7 - vpaddd ONEf(%rip), \XMM7, \XMM8 - vmovdqa \XMM8, \CTR -.endif + cmp $16, %r11 + je _T_16\@ + cmp $8, %r11 + jl _T_4\@ - ####################################################################### +_T_8\@: + vmovq %xmm9, %rax + mov %rax, (%r10) + add $8, %r10 + sub $8, %r11 + vpsrldq $8, %xmm9, %xmm9 + cmp $0, %r11 + je _return_T_done\@ +_T_4\@: + vmovd %xmm9, %eax + mov %eax, (%r10) + add $4, %r10 + sub $4, %r11 + vpsrldq $4, %xmm9, %xmm9 + cmp $0, %r11 + je _return_T_done\@ +_T_123\@: + vmovd %xmm9, %eax + cmp $2, %r11 + jl _T_1\@ + mov %ax, (%r10) + cmp $2, %r11 + je _return_T_done\@ + add $2, %r10 + sar $16, %eax +_T_1\@: + mov %al, (%r10) + jmp _return_T_done\@ - vmovdqu (arg1), \T1 - vpxor \T1, \XMM1, \XMM1 - vpxor \T1, \XMM2, \XMM2 - vpxor \T1, \XMM3, \XMM3 - vpxor \T1, \XMM4, \XMM4 - vpxor \T1, \XMM5, \XMM5 - vpxor \T1, \XMM6, \XMM6 - vpxor \T1, \XMM7, \XMM7 - vpxor \T1, \XMM8, \XMM8 +_T_16\@: + vmovdqu %xmm9, (%r10) - ####################################################################### +_return_T_done\@: + mov %r14, %rsp + pop %r15 + pop %r14 + pop %r13 + pop %r12 +.endm +#ifdef CONFIG_AS_AVX +############################################################################### +# GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0) +# Input: A and B (128-bits each, bit-reflected) +# Output: C = A*B*x mod poly, (i.e. >>1 ) +# To compute GH = GH*HashKey mod poly, give HK = HashKey<<1 mod poly as input +# GH = GH * HK * x mod poly which is equivalent to GH*HashKey mod poly. +############################################################################### +.macro GHASH_MUL_AVX GH HK T1 T2 T3 T4 T5 + vpshufd $0b01001110, \GH, \T2 + vpshufd $0b01001110, \HK, \T3 + vpxor \GH , \T2, \T2 # T2 = (a1+a0) + vpxor \HK , \T3, \T3 # T3 = (b1+b0) + vpclmulqdq $0x11, \HK, \GH, \T1 # T1 = a1*b1 + vpclmulqdq $0x00, \HK, \GH, \GH # GH = a0*b0 + vpclmulqdq $0x00, \T3, \T2, \T2 # T2 = (a1+a0)*(b1+b0) + vpxor \GH, \T2,\T2 + vpxor \T1, \T2,\T2 # T2 = a0*b1+a1*b0 - vmovdqu 16*1(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + vpslldq $8, \T2,\T3 # shift-L T3 2 DWs + vpsrldq $8, \T2,\T2 # shift-R T2 2 DWs + vpxor \T3, \GH, \GH + vpxor \T2, \T1, \T1 # = GH x HK - vmovdqu 16*2(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + #first phase of the reduction + vpslld $31, \GH, \T2 # packed right shifting << 31 + vpslld $30, \GH, \T3 # packed right shifting shift << 30 + vpslld $25, \GH, \T4 # packed right shifting shift << 25 + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 - ####################################################################### + vpsrldq $4, \T2, \T5 # shift-R T5 1 DW - vmovdqa HashKey_8(arg1), \T5 - vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1 - vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0 + vpslldq $12, \T2, \T2 # shift-L T2 3 DWs + vpxor \T2, \GH, \GH # first phase of the reduction complete - vpshufd $0b01001110, \T2, \T6 - vpxor \T2, \T6, \T6 + #second phase of the reduction - vmovdqa HashKey_8_k(arg1), \T5 - vpclmulqdq $0x00, \T5, \T6, \T6 + vpsrld $1,\GH, \T2 # packed left shifting >> 1 + vpsrld $2,\GH, \T3 # packed left shifting >> 2 + vpsrld $7,\GH, \T4 # packed left shifting >> 7 + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 - vmovdqu 16*3(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + vpxor \T5, \T2, \T2 + vpxor \T2, \GH, \GH + vpxor \T1, \GH, \GH # the result is in GH - vmovdqa TMP2(%rsp), \T1 - vmovdqa HashKey_7(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_7_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 +.endm - vmovdqu 16*4(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 +.macro PRECOMPUTE_AVX HK T1 T2 T3 T4 T5 T6 - ####################################################################### + # Haskey_i_k holds XORed values of the low and high parts of the Haskey_i + vmovdqa \HK, \T5 - vmovdqa TMP3(%rsp), \T1 - vmovdqa HashKey_6(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_k(arg1) - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_6_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^2<<1 mod poly + vmovdqa \T5, HashKey_2(arg1) # [HashKey_2] = HashKey^2<<1 mod poly + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_2_k(arg1) - vmovdqu 16*5(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^3<<1 mod poly + vmovdqa \T5, HashKey_3(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_3_k(arg1) - vmovdqa TMP4(%rsp), \T1 - vmovdqa HashKey_5(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^4<<1 mod poly + vmovdqa \T5, HashKey_4(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_4_k(arg1) - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_5_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^5<<1 mod poly + vmovdqa \T5, HashKey_5(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_5_k(arg1) - vmovdqu 16*6(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^6<<1 mod poly + vmovdqa \T5, HashKey_6(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_6_k(arg1) + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^7<<1 mod poly + vmovdqa \T5, HashKey_7(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_7_k(arg1) - vmovdqa TMP5(%rsp), \T1 - vmovdqa HashKey_4(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 + GHASH_MUL_AVX \T5, \HK, \T1, \T3, \T4, \T6, \T2 # T5 = HashKey^8<<1 mod poly + vmovdqa \T5, HashKey_8(arg1) + vpshufd $0b01001110, \T5, \T1 + vpxor \T5, \T1, \T1 + vmovdqa \T1, HashKey_8_k(arg1) - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_4_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 +.endm - vmovdqu 16*7(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 +## if a = number of total plaintext bytes +## b = floor(a/16) +## num_initial_blocks = b mod 4# +## encrypt the initial num_initial_blocks blocks and apply ghash on the ciphertext +## r10, r11, r12, rax are clobbered +## arg1, arg2, arg3, r14 are used as a pointer only, not modified - vmovdqa TMP6(%rsp), \T1 - vmovdqa HashKey_3(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 +.macro INITIAL_BLOCKS_AVX num_initial_blocks T1 T2 T3 T4 T5 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T6 T_key ENC_DEC + i = (8-\num_initial_blocks) + j = 0 + setreg - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_3_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 + mov arg6, %r10 # r10 = AAD + mov arg7, %r12 # r12 = aadLen - vmovdqu 16*8(arg1), \T1 - vaesenc \T1, \XMM1, \XMM1 - vaesenc \T1, \XMM2, \XMM2 - vaesenc \T1, \XMM3, \XMM3 - vaesenc \T1, \XMM4, \XMM4 - vaesenc \T1, \XMM5, \XMM5 - vaesenc \T1, \XMM6, \XMM6 - vaesenc \T1, \XMM7, \XMM7 - vaesenc \T1, \XMM8, \XMM8 + mov %r12, %r11 - vmovdqa TMP7(%rsp), \T1 - vmovdqa HashKey_2(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 + vpxor reg_j, reg_j, reg_j + vpxor reg_i, reg_i, reg_i + cmp $16, %r11 + jl _get_AAD_rest8\@ +_get_AAD_blocks\@: + vmovdqu (%r10), reg_i + vpshufb SHUF_MASK(%rip), reg_i, reg_i + vpxor reg_i, reg_j, reg_j + GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 + add $16, %r10 + sub $16, %r12 + sub $16, %r11 + cmp $16, %r11 + jge _get_AAD_blocks\@ + vmovdqu reg_j, reg_i + cmp $0, %r11 + je _get_AAD_done\@ - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_2_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 + vpxor reg_i, reg_i, reg_i - ####################################################################### + /* read the last <16B of AAD. since we have at least 4B of + data right after the AAD (the ICV, and maybe some CT), we can + read 4B/8B blocks safely, and then get rid of the extra stuff */ +_get_AAD_rest8\@: + cmp $4, %r11 + jle _get_AAD_rest4\@ + movq (%r10), \T1 + add $8, %r10 + sub $8, %r11 + vpslldq $8, \T1, \T1 + vpsrldq $8, reg_i, reg_i + vpxor \T1, reg_i, reg_i + jmp _get_AAD_rest8\@ +_get_AAD_rest4\@: + cmp $0, %r11 + jle _get_AAD_rest0\@ + mov (%r10), %eax + movq %rax, \T1 + add $4, %r10 + sub $4, %r11 + vpslldq $12, \T1, \T1 + vpsrldq $4, reg_i, reg_i + vpxor \T1, reg_i, reg_i +_get_AAD_rest0\@: + /* finalize: shift out the extra bytes we read, and align + left. since pslldq can only shift by an immediate, we use + vpshufb and an array of shuffle masks */ + movq %r12, %r11 + salq $4, %r11 + movdqu aad_shift_arr(%r11), \T1 + vpshufb \T1, reg_i, reg_i +_get_AAD_rest_final\@: + vpshufb SHUF_MASK(%rip), reg_i, reg_i + vpxor reg_j, reg_i, reg_i + GHASH_MUL_AVX reg_i, \T2, \T1, \T3, \T4, \T5, \T6 - vmovdqu 16*9(arg1), \T5 - vaesenc \T5, \XMM1, \XMM1 - vaesenc \T5, \XMM2, \XMM2 - vaesenc \T5, \XMM3, \XMM3 - vaesenc \T5, \XMM4, \XMM4 - vaesenc \T5, \XMM5, \XMM5 - vaesenc \T5, \XMM6, \XMM6 - vaesenc \T5, \XMM7, \XMM7 - vaesenc \T5, \XMM8, \XMM8 +_get_AAD_done\@: + # initialize the data pointer offset as zero + xor %r11d, %r11d - vmovdqa TMP8(%rsp), \T1 - vmovdqa HashKey(arg1), \T5 - vpclmulqdq $0x11, \T5, \T1, \T3 - vpxor \T3, \T4, \T4 - vpclmulqdq $0x00, \T5, \T1, \T3 - vpxor \T3, \T7, \T7 + # start AES for num_initial_blocks blocks + mov arg5, %rax # rax = *Y0 + vmovdqu (%rax), \CTR # CTR = Y0 + vpshufb SHUF_MASK(%rip), \CTR, \CTR - vpshufd $0b01001110, \T1, \T3 - vpxor \T1, \T3, \T3 - vmovdqa HashKey_k(arg1), \T5 - vpclmulqdq $0x10, \T5, \T3, \T3 - vpxor \T3, \T6, \T6 - vpxor \T4, \T6, \T6 - vpxor \T7, \T6, \T6 + i = (9-\num_initial_blocks) + setreg +.rep \num_initial_blocks + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, reg_i + vpshufb SHUF_MASK(%rip), reg_i, reg_i # perform a 16Byte swap + i = (i+1) + setreg +.endr - vmovdqu 16*10(arg1), \T5 + vmovdqa (arg1), \T_key + i = (9-\num_initial_blocks) + setreg +.rep \num_initial_blocks + vpxor \T_key, reg_i, reg_i + i = (i+1) + setreg +.endr - i = 0 j = 1 setreg -.rep 8 - vpxor 16*i(arg3, %r11), \T5, \T2 - .if \ENC_DEC == ENC - vaesenclast \T2, reg_j, reg_j - .else - vaesenclast \T2, reg_j, \T3 - vmovdqu 16*i(arg3, %r11), reg_j - vmovdqu \T3, 16*i(arg2, %r11) - .endif +.rep 9 + vmovdqa 16*j(arg1), \T_key + i = (9-\num_initial_blocks) + setreg +.rep \num_initial_blocks + vaesenc \T_key, reg_i, reg_i i = (i+1) + setreg +.endr + j = (j+1) setreg .endr - ####################################################################### - vpslldq $8, \T6, \T3 # shift-L T3 2 DWs - vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs - vpxor \T3, \T7, \T7 - vpxor \T4, \T6, \T6 # accumulate the results in T6:T7 + vmovdqa 16*10(arg1), \T_key + i = (9-\num_initial_blocks) + setreg +.rep \num_initial_blocks + vaesenclast \T_key, reg_i, reg_i + i = (i+1) + setreg +.endr + i = (9-\num_initial_blocks) + setreg +.rep \num_initial_blocks + vmovdqu (arg3, %r11), \T1 + vpxor \T1, reg_i, reg_i + vmovdqu reg_i, (arg2 , %r11) # write back ciphertext for num_initial_blocks blocks + add $16, %r11 +.if \ENC_DEC == DEC + vmovdqa \T1, reg_i +.endif + vpshufb SHUF_MASK(%rip), reg_i, reg_i # prepare ciphertext for GHASH computations + i = (i+1) + setreg +.endr - ####################################################################### - #first phase of the reduction - ####################################################################### - vpslld $31, \T7, \T2 # packed right shifting << 31 - vpslld $30, \T7, \T3 # packed right shifting shift << 30 - vpslld $25, \T7, \T4 # packed right shifting shift << 25 + i = (8-\num_initial_blocks) + j = (9-\num_initial_blocks) + setreg - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 +.rep \num_initial_blocks + vpxor reg_i, reg_j, reg_j + GHASH_MUL_AVX reg_j, \T2, \T1, \T3, \T4, \T5, \T6 # apply GHASH on num_initial_blocks blocks + i = (i+1) + j = (j+1) + setreg +.endr + # XMM8 has the combined result here - vpsrldq $4, \T2, \T1 # shift-R T1 1 DW + vmovdqa \XMM8, TMP1(%rsp) + vmovdqa \XMM8, \T3 - vpslldq $12, \T2, \T2 # shift-L T2 3 DWs - vpxor \T2, \T7, \T7 # first phase of the reduction complete - ####################################################################### - .if \ENC_DEC == ENC - vmovdqu \XMM1, 16*0(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM2, 16*1(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM3, 16*2(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM4, 16*3(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM5, 16*4(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM6, 16*5(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM7, 16*6(arg2,%r11) # Write to the Ciphertext buffer - vmovdqu \XMM8, 16*7(arg2,%r11) # Write to the Ciphertext buffer - .endif + cmp $128, %r13 + jl _initial_blocks_done\@ # no need for precomputed constants - ####################################################################### - #second phase of the reduction - vpsrld $1, \T7, \T2 # packed left shifting >> 1 - vpsrld $2, \T7, \T3 # packed left shifting >> 2 - vpsrld $7, \T7, \T4 # packed left shifting >> 7 - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 +############################################################################### +# Haskey_i_k holds XORed values of the low and high parts of the Haskey_i + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM1 + vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap - vpxor \T1, \T2, \T2 - vpxor \T2, \T7, \T7 - vpxor \T7, \T6, \T6 # the result is in T6 - ####################################################################### + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM2 + vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap - vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM3 + vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM4 + vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap - vpxor \T6, \XMM1, \XMM1 + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM5 + vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM6 + vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM7 + vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap -.endm + vpaddd ONE(%rip), \CTR, \CTR # INCR Y0 + vmovdqa \CTR, \XMM8 + vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap + vmovdqa (arg1), \T_key + vpxor \T_key, \XMM1, \XMM1 + vpxor \T_key, \XMM2, \XMM2 + vpxor \T_key, \XMM3, \XMM3 + vpxor \T_key, \XMM4, \XMM4 + vpxor \T_key, \XMM5, \XMM5 + vpxor \T_key, \XMM6, \XMM6 + vpxor \T_key, \XMM7, \XMM7 + vpxor \T_key, \XMM8, \XMM8 -# GHASH the last 4 ciphertext blocks. -.macro GHASH_LAST_8_AVX T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 + i = 1 + setreg +.rep 9 # do 9 rounds + vmovdqa 16*i(arg1), \T_key + vaesenc \T_key, \XMM1, \XMM1 + vaesenc \T_key, \XMM2, \XMM2 + vaesenc \T_key, \XMM3, \XMM3 + vaesenc \T_key, \XMM4, \XMM4 + vaesenc \T_key, \XMM5, \XMM5 + vaesenc \T_key, \XMM6, \XMM6 + vaesenc \T_key, \XMM7, \XMM7 + vaesenc \T_key, \XMM8, \XMM8 + i = (i+1) + setreg +.endr - ## Karatsuba Method + vmovdqa 16*i(arg1), \T_key + vaesenclast \T_key, \XMM1, \XMM1 + vaesenclast \T_key, \XMM2, \XMM2 + vaesenclast \T_key, \XMM3, \XMM3 + vaesenclast \T_key, \XMM4, \XMM4 + vaesenclast \T_key, \XMM5, \XMM5 + vaesenclast \T_key, \XMM6, \XMM6 + vaesenclast \T_key, \XMM7, \XMM7 + vaesenclast \T_key, \XMM8, \XMM8 - vpshufd $0b01001110, \XMM1, \T2 - vpxor \XMM1, \T2, \T2 - vmovdqa HashKey_8(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM1, \T6 - vpclmulqdq $0x00, \T5, \XMM1, \T7 + vmovdqu (arg3, %r11), \T1 + vpxor \T1, \XMM1, \XMM1 + vmovdqu \XMM1, (arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM1 + .endif - vmovdqa HashKey_8_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \XMM1 + vmovdqu 16*1(arg3, %r11), \T1 + vpxor \T1, \XMM2, \XMM2 + vmovdqu \XMM2, 16*1(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM2 + .endif - ###################### + vmovdqu 16*2(arg3, %r11), \T1 + vpxor \T1, \XMM3, \XMM3 + vmovdqu \XMM3, 16*2(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM3 + .endif - vpshufd $0b01001110, \XMM2, \T2 - vpxor \XMM2, \T2, \T2 - vmovdqa HashKey_7(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM2, \T4 - vpxor \T4, \T6, \T6 + vmovdqu 16*3(arg3, %r11), \T1 + vpxor \T1, \XMM4, \XMM4 + vmovdqu \XMM4, 16*3(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM4 + .endif - vpclmulqdq $0x00, \T5, \XMM2, \T4 - vpxor \T4, \T7, \T7 + vmovdqu 16*4(arg3, %r11), \T1 + vpxor \T1, \XMM5, \XMM5 + vmovdqu \XMM5, 16*4(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM5 + .endif - vmovdqa HashKey_7_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 + vmovdqu 16*5(arg3, %r11), \T1 + vpxor \T1, \XMM6, \XMM6 + vmovdqu \XMM6, 16*5(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM6 + .endif - ###################### + vmovdqu 16*6(arg3, %r11), \T1 + vpxor \T1, \XMM7, \XMM7 + vmovdqu \XMM7, 16*6(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM7 + .endif - vpshufd $0b01001110, \XMM3, \T2 - vpxor \XMM3, \T2, \T2 - vmovdqa HashKey_6(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM3, \T4 - vpxor \T4, \T6, \T6 + vmovdqu 16*7(arg3, %r11), \T1 + vpxor \T1, \XMM8, \XMM8 + vmovdqu \XMM8, 16*7(arg2 , %r11) + .if \ENC_DEC == DEC + vmovdqa \T1, \XMM8 + .endif - vpclmulqdq $0x00, \T5, \XMM3, \T4 - vpxor \T4, \T7, \T7 + add $128, %r11 - vmovdqa HashKey_6_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 + vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap + vpxor TMP1(%rsp), \XMM1, \XMM1 # combine GHASHed value with the corresponding ciphertext + vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap - ###################### +############################################################################### - vpshufd $0b01001110, \XMM4, \T2 - vpxor \XMM4, \T2, \T2 - vmovdqa HashKey_5(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM4, \T4 - vpxor \T4, \T6, \T6 +_initial_blocks_done\@: - vpclmulqdq $0x00, \T5, \XMM4, \T4 - vpxor \T4, \T7, \T7 +.endm - vmovdqa HashKey_5_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 +# encrypt 8 blocks at a time +# ghash the 8 previously encrypted ciphertext blocks +# arg1, arg2, arg3 are used as pointers only, not modified +# r11 is the data offset value +.macro GHASH_8_ENCRYPT_8_PARALLEL_AVX T1 T2 T3 T4 T5 T6 CTR XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 T7 loop_idx ENC_DEC - ###################### + vmovdqa \XMM1, \T2 + vmovdqa \XMM2, TMP2(%rsp) + vmovdqa \XMM3, TMP3(%rsp) + vmovdqa \XMM4, TMP4(%rsp) + vmovdqa \XMM5, TMP5(%rsp) + vmovdqa \XMM6, TMP6(%rsp) + vmovdqa \XMM7, TMP7(%rsp) + vmovdqa \XMM8, TMP8(%rsp) - vpshufd $0b01001110, \XMM5, \T2 - vpxor \XMM5, \T2, \T2 - vmovdqa HashKey_4(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM5, \T4 - vpxor \T4, \T6, \T6 +.if \loop_idx == in_order + vpaddd ONE(%rip), \CTR, \XMM1 # INCR CNT + vpaddd ONE(%rip), \XMM1, \XMM2 + vpaddd ONE(%rip), \XMM2, \XMM3 + vpaddd ONE(%rip), \XMM3, \XMM4 + vpaddd ONE(%rip), \XMM4, \XMM5 + vpaddd ONE(%rip), \XMM5, \XMM6 + vpaddd ONE(%rip), \XMM6, \XMM7 + vpaddd ONE(%rip), \XMM7, \XMM8 + vmovdqa \XMM8, \CTR - vpclmulqdq $0x00, \T5, \XMM5, \T4 - vpxor \T4, \T7, \T7 + vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap +.else + vpaddd ONEf(%rip), \CTR, \XMM1 # INCR CNT + vpaddd ONEf(%rip), \XMM1, \XMM2 + vpaddd ONEf(%rip), \XMM2, \XMM3 + vpaddd ONEf(%rip), \XMM3, \XMM4 + vpaddd ONEf(%rip), \XMM4, \XMM5 + vpaddd ONEf(%rip), \XMM5, \XMM6 + vpaddd ONEf(%rip), \XMM6, \XMM7 + vpaddd ONEf(%rip), \XMM7, \XMM8 + vmovdqa \XMM8, \CTR +.endif - vmovdqa HashKey_4_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 - ###################### + ####################################################################### - vpshufd $0b01001110, \XMM6, \T2 - vpxor \XMM6, \T2, \T2 - vmovdqa HashKey_3(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM6, \T4 - vpxor \T4, \T6, \T6 + vmovdqu (arg1), \T1 + vpxor \T1, \XMM1, \XMM1 + vpxor \T1, \XMM2, \XMM2 + vpxor \T1, \XMM3, \XMM3 + vpxor \T1, \XMM4, \XMM4 + vpxor \T1, \XMM5, \XMM5 + vpxor \T1, \XMM6, \XMM6 + vpxor \T1, \XMM7, \XMM7 + vpxor \T1, \XMM8, \XMM8 - vpclmulqdq $0x00, \T5, \XMM6, \T4 - vpxor \T4, \T7, \T7 + ####################################################################### - vmovdqa HashKey_3_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 - ###################### - vpshufd $0b01001110, \XMM7, \T2 - vpxor \XMM7, \T2, \T2 - vmovdqa HashKey_2(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM7, \T4 - vpxor \T4, \T6, \T6 - vpclmulqdq $0x00, \T5, \XMM7, \T4 - vpxor \T4, \T7, \T7 - vmovdqa HashKey_2_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor \T2, \XMM1, \XMM1 + vmovdqu 16*1(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 - ###################### + vmovdqu 16*2(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 - vpshufd $0b01001110, \XMM8, \T2 - vpxor \XMM8, \T2, \T2 - vmovdqa HashKey(arg1), \T5 - vpclmulqdq $0x11, \T5, \XMM8, \T4 - vpxor \T4, \T6, \T6 - vpclmulqdq $0x00, \T5, \XMM8, \T4 - vpxor \T4, \T7, \T7 + ####################################################################### - vmovdqa HashKey_k(arg1), \T3 - vpclmulqdq $0x00, \T3, \T2, \T2 + vmovdqa HashKey_8(arg1), \T5 + vpclmulqdq $0x11, \T5, \T2, \T4 # T4 = a1*b1 + vpclmulqdq $0x00, \T5, \T2, \T7 # T7 = a0*b0 - vpxor \T2, \XMM1, \XMM1 - vpxor \T6, \XMM1, \XMM1 - vpxor \T7, \XMM1, \T2 + vpshufd $0b01001110, \T2, \T6 + vpxor \T2, \T6, \T6 + vmovdqa HashKey_8_k(arg1), \T5 + vpclmulqdq $0x00, \T5, \T6, \T6 + vmovdqu 16*3(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 + vmovdqa TMP2(%rsp), \T1 + vmovdqa HashKey_7(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 - vpslldq $8, \T2, \T4 - vpsrldq $8, \T2, \T2 + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_7_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - vpxor \T4, \T7, \T7 - vpxor \T2, \T6, \T6 # holds the result of - # the accumulated carry-less multiplications + vmovdqu 16*4(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 - ####################################################################### - #first phase of the reduction - vpslld $31, \T7, \T2 # packed right shifting << 31 - vpslld $30, \T7, \T3 # packed right shifting shift << 30 - vpslld $25, \T7, \T4 # packed right shifting shift << 25 + ####################################################################### - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 + vmovdqa TMP3(%rsp), \T1 + vmovdqa HashKey_6(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 - vpsrldq $4, \T2, \T1 # shift-R T1 1 DW + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_6_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - vpslldq $12, \T2, \T2 # shift-L T2 3 DWs - vpxor \T2, \T7, \T7 # first phase of the reduction complete - ####################################################################### + vmovdqu 16*5(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 + vmovdqa TMP4(%rsp), \T1 + vmovdqa HashKey_5(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 - #second phase of the reduction - vpsrld $1, \T7, \T2 # packed left shifting >> 1 - vpsrld $2, \T7, \T3 # packed left shifting >> 2 - vpsrld $7, \T7, \T4 # packed left shifting >> 7 - vpxor \T3, \T2, \T2 # xor the shifted versions - vpxor \T4, \T2, \T2 + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_5_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - vpxor \T1, \T2, \T2 - vpxor \T2, \T7, \T7 - vpxor \T7, \T6, \T6 # the result is in T6 + vmovdqu 16*6(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 -.endm + vmovdqa TMP5(%rsp), \T1 + vmovdqa HashKey_4(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 -# combined for GCM encrypt and decrypt functions -# clobbering all xmm registers -# clobbering r10, r11, r12, r13, r14, r15 -.macro GCM_ENC_DEC_AVX ENC_DEC + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_4_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - #the number of pushes must equal STACK_OFFSET - push %r12 - push %r13 - push %r14 - push %r15 + vmovdqu 16*7(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 - mov %rsp, %r14 + vmovdqa TMP6(%rsp), \T1 + vmovdqa HashKey_3(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_3_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 + vmovdqu 16*8(arg1), \T1 + vaesenc \T1, \XMM1, \XMM1 + vaesenc \T1, \XMM2, \XMM2 + vaesenc \T1, \XMM3, \XMM3 + vaesenc \T1, \XMM4, \XMM4 + vaesenc \T1, \XMM5, \XMM5 + vaesenc \T1, \XMM6, \XMM6 + vaesenc \T1, \XMM7, \XMM7 + vaesenc \T1, \XMM8, \XMM8 - sub $VARIABLE_OFFSET, %rsp - and $~63, %rsp # align rsp to 64 bytes + vmovdqa TMP7(%rsp), \T1 + vmovdqa HashKey_2(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_2_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - vmovdqu HashKey(arg1), %xmm13 # xmm13 = HashKey + ####################################################################### - mov arg4, %r13 # save the number of bytes of plaintext/ciphertext - and $-16, %r13 # r13 = r13 - (r13 mod 16) + vmovdqu 16*9(arg1), \T5 + vaesenc \T5, \XMM1, \XMM1 + vaesenc \T5, \XMM2, \XMM2 + vaesenc \T5, \XMM3, \XMM3 + vaesenc \T5, \XMM4, \XMM4 + vaesenc \T5, \XMM5, \XMM5 + vaesenc \T5, \XMM6, \XMM6 + vaesenc \T5, \XMM7, \XMM7 + vaesenc \T5, \XMM8, \XMM8 - mov %r13, %r12 - shr $4, %r12 - and $7, %r12 - jz _initial_num_blocks_is_0\@ + vmovdqa TMP8(%rsp), \T1 + vmovdqa HashKey(arg1), \T5 + vpclmulqdq $0x11, \T5, \T1, \T3 + vpxor \T3, \T4, \T4 + vpclmulqdq $0x00, \T5, \T1, \T3 + vpxor \T3, \T7, \T7 - cmp $7, %r12 - je _initial_num_blocks_is_7\@ - cmp $6, %r12 - je _initial_num_blocks_is_6\@ - cmp $5, %r12 - je _initial_num_blocks_is_5\@ - cmp $4, %r12 - je _initial_num_blocks_is_4\@ - cmp $3, %r12 - je _initial_num_blocks_is_3\@ - cmp $2, %r12 - je _initial_num_blocks_is_2\@ + vpshufd $0b01001110, \T1, \T3 + vpxor \T1, \T3, \T3 + vmovdqa HashKey_k(arg1), \T5 + vpclmulqdq $0x10, \T5, \T3, \T3 + vpxor \T3, \T6, \T6 - jmp _initial_num_blocks_is_1\@ + vpxor \T4, \T6, \T6 + vpxor \T7, \T6, \T6 -_initial_num_blocks_is_7\@: - INITIAL_BLOCKS_AVX 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*7, %r13 - jmp _initial_blocks_encrypted\@ + vmovdqu 16*10(arg1), \T5 -_initial_num_blocks_is_6\@: - INITIAL_BLOCKS_AVX 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*6, %r13 - jmp _initial_blocks_encrypted\@ + i = 0 + j = 1 + setreg +.rep 8 + vpxor 16*i(arg3, %r11), \T5, \T2 + .if \ENC_DEC == ENC + vaesenclast \T2, reg_j, reg_j + .else + vaesenclast \T2, reg_j, \T3 + vmovdqu 16*i(arg3, %r11), reg_j + vmovdqu \T3, 16*i(arg2, %r11) + .endif + i = (i+1) + j = (j+1) + setreg +.endr + ####################################################################### -_initial_num_blocks_is_5\@: - INITIAL_BLOCKS_AVX 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*5, %r13 - jmp _initial_blocks_encrypted\@ -_initial_num_blocks_is_4\@: - INITIAL_BLOCKS_AVX 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*4, %r13 - jmp _initial_blocks_encrypted\@ + vpslldq $8, \T6, \T3 # shift-L T3 2 DWs + vpsrldq $8, \T6, \T6 # shift-R T2 2 DWs + vpxor \T3, \T7, \T7 + vpxor \T4, \T6, \T6 # accumulate the results in T6:T7 -_initial_num_blocks_is_3\@: - INITIAL_BLOCKS_AVX 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*3, %r13 - jmp _initial_blocks_encrypted\@ -_initial_num_blocks_is_2\@: - INITIAL_BLOCKS_AVX 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*2, %r13 - jmp _initial_blocks_encrypted\@ -_initial_num_blocks_is_1\@: - INITIAL_BLOCKS_AVX 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*1, %r13 - jmp _initial_blocks_encrypted\@ + ####################################################################### + #first phase of the reduction + ####################################################################### + vpslld $31, \T7, \T2 # packed right shifting << 31 + vpslld $30, \T7, \T3 # packed right shifting shift << 30 + vpslld $25, \T7, \T4 # packed right shifting shift << 25 -_initial_num_blocks_is_0\@: - INITIAL_BLOCKS_AVX 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 + vpsrldq $4, \T2, \T1 # shift-R T1 1 DW -_initial_blocks_encrypted\@: - cmp $0, %r13 - je _zero_cipher_left\@ + vpslldq $12, \T2, \T2 # shift-L T2 3 DWs + vpxor \T2, \T7, \T7 # first phase of the reduction complete + ####################################################################### + .if \ENC_DEC == ENC + vmovdqu \XMM1, 16*0(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM2, 16*1(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM3, 16*2(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM4, 16*3(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM5, 16*4(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM6, 16*5(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM7, 16*6(arg2,%r11) # Write to the Ciphertext buffer + vmovdqu \XMM8, 16*7(arg2,%r11) # Write to the Ciphertext buffer + .endif - sub $128, %r13 - je _eight_cipher_left\@ + ####################################################################### + #second phase of the reduction + vpsrld $1, \T7, \T2 # packed left shifting >> 1 + vpsrld $2, \T7, \T3 # packed left shifting >> 2 + vpsrld $7, \T7, \T4 # packed left shifting >> 7 + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 + vpxor \T1, \T2, \T2 + vpxor \T2, \T7, \T7 + vpxor \T7, \T6, \T6 # the result is in T6 + ####################################################################### + vpshufb SHUF_MASK(%rip), \XMM1, \XMM1 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM2, \XMM2 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM3, \XMM3 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM4, \XMM4 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM5, \XMM5 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM6, \XMM6 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM7, \XMM7 # perform a 16Byte swap + vpshufb SHUF_MASK(%rip), \XMM8, \XMM8 # perform a 16Byte swap - vmovd %xmm9, %r15d - and $255, %r15d - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + vpxor \T6, \XMM1, \XMM1 -_encrypt_by_8_new\@: - cmp $(255-8), %r15d - jg _encrypt_by_8\@ +.endm - add $8, %r15b - GHASH_8_ENCRYPT_8_PARALLEL_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC - add $128, %r11 - sub $128, %r13 - jne _encrypt_by_8_new\@ +# GHASH the last 4 ciphertext blocks. +.macro GHASH_LAST_8_AVX T1 T2 T3 T4 T5 T6 T7 XMM1 XMM2 XMM3 XMM4 XMM5 XMM6 XMM7 XMM8 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - jmp _eight_cipher_left\@ + ## Karatsuba Method -_encrypt_by_8\@: - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - add $8, %r15b - GHASH_8_ENCRYPT_8_PARALLEL_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - add $128, %r11 - sub $128, %r13 - jne _encrypt_by_8_new\@ - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + vpshufd $0b01001110, \XMM1, \T2 + vpxor \XMM1, \T2, \T2 + vmovdqa HashKey_8(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM1, \T6 + vpclmulqdq $0x00, \T5, \XMM1, \T7 + vmovdqa HashKey_8_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \XMM1 + ###################### + vpshufd $0b01001110, \XMM2, \T2 + vpxor \XMM2, \T2, \T2 + vmovdqa HashKey_7(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM2, \T4 + vpxor \T4, \T6, \T6 -_eight_cipher_left\@: - GHASH_LAST_8_AVX %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8 + vpclmulqdq $0x00, \T5, \XMM2, \T4 + vpxor \T4, \T7, \T7 + vmovdqa HashKey_7_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 -_zero_cipher_left\@: - cmp $16, arg4 - jl _only_less_than_16\@ + ###################### - mov arg4, %r13 - and $15, %r13 # r13 = (arg4 mod 16) + vpshufd $0b01001110, \XMM3, \T2 + vpxor \XMM3, \T2, \T2 + vmovdqa HashKey_6(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM3, \T4 + vpxor \T4, \T6, \T6 - je _multiple_of_16_bytes\@ + vpclmulqdq $0x00, \T5, \XMM3, \T4 + vpxor \T4, \T7, \T7 - # handle the last <16 Byte block seperately + vmovdqa HashKey_6_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 + ###################### - vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) + vpshufd $0b01001110, \XMM4, \T2 + vpxor \XMM4, \T2, \T2 + vmovdqa HashKey_5(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM4, \T4 + vpxor \T4, \T6, \T6 - sub $16, %r11 - add %r13, %r11 - vmovdqu (arg3, %r11), %xmm1 # receive the last <16 Byte block + vpclmulqdq $0x00, \T5, \XMM4, \T4 + vpxor \T4, \T7, \T7 - lea SHIFT_MASK+16(%rip), %r12 - sub %r13, %r12 # adjust the shuffle mask pointer to be - # able to shift 16-r13 bytes (r13 is the - # number of bytes in plaintext mod 16) - vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask - vpshufb %xmm2, %xmm1, %xmm1 # shift right 16-r13 bytes - jmp _final_ghash_mul\@ + vmovdqa HashKey_5_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 -_only_less_than_16\@: - # check for 0 length - mov arg4, %r13 - and $15, %r13 # r13 = (arg4 mod 16) + ###################### - je _multiple_of_16_bytes\@ + vpshufd $0b01001110, \XMM5, \T2 + vpxor \XMM5, \T2, \T2 + vmovdqa HashKey_4(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM5, \T4 + vpxor \T4, \T6, \T6 - # handle the last <16 Byte block seperately + vpclmulqdq $0x00, \T5, \XMM5, \T4 + vpxor \T4, \T7, \T7 + vmovdqa HashKey_4_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 - vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) + ###################### + vpshufd $0b01001110, \XMM6, \T2 + vpxor \XMM6, \T2, \T2 + vmovdqa HashKey_3(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM6, \T4 + vpxor \T4, \T6, \T6 - lea SHIFT_MASK+16(%rip), %r12 - sub %r13, %r12 # adjust the shuffle mask pointer to be - # able to shift 16-r13 bytes (r13 is the - # number of bytes in plaintext mod 16) + vpclmulqdq $0x00, \T5, \XMM6, \T4 + vpxor \T4, \T7, \T7 -_get_last_16_byte_loop\@: - movb (arg3, %r11), %al - movb %al, TMP1 (%rsp , %r11) - add $1, %r11 - cmp %r13, %r11 - jne _get_last_16_byte_loop\@ + vmovdqa HashKey_3_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 - vmovdqu TMP1(%rsp), %xmm1 + ###################### - sub $16, %r11 + vpshufd $0b01001110, \XMM7, \T2 + vpxor \XMM7, \T2, \T2 + vmovdqa HashKey_2(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM7, \T4 + vpxor \T4, \T6, \T6 -_final_ghash_mul\@: - .if \ENC_DEC == DEC - vmovdqa %xmm1, %xmm2 - vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) - vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to - # mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm2, %xmm2 - vpshufb SHUF_MASK(%rip), %xmm2, %xmm2 - vpxor %xmm2, %xmm14, %xmm14 - #GHASH computation for the last <16 Byte block - GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 - sub %r13, %r11 - add $16, %r11 - .else - vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) - vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to - # mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - vpxor %xmm9, %xmm14, %xmm14 - #GHASH computation for the last <16 Byte block - GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 - sub %r13, %r11 - add $16, %r11 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext - .endif + vpclmulqdq $0x00, \T5, \XMM7, \T4 + vpxor \T4, \T7, \T7 + vmovdqa HashKey_2_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 - ############################# - # output r13 Bytes - vmovq %xmm9, %rax - cmp $8, %r13 - jle _less_than_8_bytes_left\@ + ###################### - mov %rax, (arg2 , %r11) - add $8, %r11 - vpsrldq $8, %xmm9, %xmm9 - vmovq %xmm9, %rax - sub $8, %r13 + vpshufd $0b01001110, \XMM8, \T2 + vpxor \XMM8, \T2, \T2 + vmovdqa HashKey(arg1), \T5 + vpclmulqdq $0x11, \T5, \XMM8, \T4 + vpxor \T4, \T6, \T6 -_less_than_8_bytes_left\@: - movb %al, (arg2 , %r11) - add $1, %r11 - shr $8, %rax - sub $1, %r13 - jne _less_than_8_bytes_left\@ - ############################# + vpclmulqdq $0x00, \T5, \XMM8, \T4 + vpxor \T4, \T7, \T7 -_multiple_of_16_bytes\@: - mov arg7, %r12 # r12 = aadLen (number of bytes) - shl $3, %r12 # convert into number of bits - vmovd %r12d, %xmm15 # len(A) in xmm15 + vmovdqa HashKey_k(arg1), \T3 + vpclmulqdq $0x00, \T3, \T2, \T2 - shl $3, arg4 # len(C) in bits (*128) - vmovq arg4, %xmm1 - vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000 - vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C) + vpxor \T2, \XMM1, \XMM1 + vpxor \T6, \XMM1, \XMM1 + vpxor \T7, \XMM1, \T2 - vpxor %xmm15, %xmm14, %xmm14 - GHASH_MUL_AVX %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation - vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap - mov arg5, %rax # rax = *Y0 - vmovdqu (%rax), %xmm9 # xmm9 = Y0 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Y0) - vpxor %xmm14, %xmm9, %xmm9 + vpslldq $8, \T2, \T4 + vpsrldq $8, \T2, \T2 + vpxor \T4, \T7, \T7 + vpxor \T2, \T6, \T6 # holds the result of + # the accumulated carry-less multiplications + ####################################################################### + #first phase of the reduction + vpslld $31, \T7, \T2 # packed right shifting << 31 + vpslld $30, \T7, \T3 # packed right shifting shift << 30 + vpslld $25, \T7, \T4 # packed right shifting shift << 25 -_return_T\@: - mov arg8, %r10 # r10 = authTag - mov arg9, %r11 # r11 = auth_tag_len + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 - cmp $16, %r11 - je _T_16\@ + vpsrldq $4, \T2, \T1 # shift-R T1 1 DW - cmp $8, %r11 - jl _T_4\@ + vpslldq $12, \T2, \T2 # shift-L T2 3 DWs + vpxor \T2, \T7, \T7 # first phase of the reduction complete + ####################################################################### -_T_8\@: - vmovq %xmm9, %rax - mov %rax, (%r10) - add $8, %r10 - sub $8, %r11 - vpsrldq $8, %xmm9, %xmm9 - cmp $0, %r11 - je _return_T_done\@ -_T_4\@: - vmovd %xmm9, %eax - mov %eax, (%r10) - add $4, %r10 - sub $4, %r11 - vpsrldq $4, %xmm9, %xmm9 - cmp $0, %r11 - je _return_T_done\@ -_T_123\@: - vmovd %xmm9, %eax - cmp $2, %r11 - jl _T_1\@ - mov %ax, (%r10) - cmp $2, %r11 - je _return_T_done\@ - add $2, %r10 - sar $16, %eax -_T_1\@: - mov %al, (%r10) - jmp _return_T_done\@ -_T_16\@: - vmovdqu %xmm9, (%r10) + #second phase of the reduction + vpsrld $1, \T7, \T2 # packed left shifting >> 1 + vpsrld $2, \T7, \T3 # packed left shifting >> 2 + vpsrld $7, \T7, \T4 # packed left shifting >> 7 + vpxor \T3, \T2, \T2 # xor the shifted versions + vpxor \T4, \T2, \T2 -_return_T_done\@: - mov %r14, %rsp + vpxor \T1, \T2, \T2 + vpxor \T2, \T7, \T7 + vpxor \T7, \T6, \T6 # the result is in T6 - pop %r15 - pop %r14 - pop %r13 - pop %r12 .endm - ############################################################# #void aesni_gcm_precomp_avx_gen2 # (gcm_data *my_ctx_data, @@ -1593,7 +1591,7 @@ ENDPROC(aesni_gcm_precomp_avx_gen2) # Valid values are 16 (most likely), 12 or 8. */ ############################################################################### ENTRY(aesni_gcm_enc_avx_gen2) - GCM_ENC_DEC_AVX ENC + GCM_ENC_DEC INITIAL_BLOCKS_AVX GHASH_8_ENCRYPT_8_PARALLEL_AVX GHASH_LAST_8_AVX GHASH_MUL_AVX ENC ret ENDPROC(aesni_gcm_enc_avx_gen2) @@ -1614,7 +1612,7 @@ ENDPROC(aesni_gcm_enc_avx_gen2) # Valid values are 16 (most likely), 12 or 8. */ ############################################################################### ENTRY(aesni_gcm_dec_avx_gen2) - GCM_ENC_DEC_AVX DEC + GCM_ENC_DEC INITIAL_BLOCKS_AVX GHASH_8_ENCRYPT_8_PARALLEL_AVX GHASH_LAST_8_AVX GHASH_MUL_AVX DEC ret ENDPROC(aesni_gcm_dec_avx_gen2) #endif /* CONFIG_AS_AVX */ @@ -2378,477 +2376,164 @@ _initial_blocks_done\@: vmovdqa HashKey_7(arg1), \T5 vpshufd $0b01001110, \XMM2, \T2 vpshufd $0b01001110, \T5, \T3 - vpxor \XMM2, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM2, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM2, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey_6(arg1), \T5 - vpshufd $0b01001110, \XMM3, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM3, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM3, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM3, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey_5(arg1), \T5 - vpshufd $0b01001110, \XMM4, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM4, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM4, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM4, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey_4(arg1), \T5 - vpshufd $0b01001110, \XMM5, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM5, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM5, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM5, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey_3(arg1), \T5 - vpshufd $0b01001110, \XMM6, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM6, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM6, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM6, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey_2(arg1), \T5 - vpshufd $0b01001110, \XMM7, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM7, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM7, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM7, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - - ###################### - - vmovdqa HashKey(arg1), \T5 - vpshufd $0b01001110, \XMM8, \T2 - vpshufd $0b01001110, \T5, \T3 - vpxor \XMM8, \T2, \T2 - vpxor \T5, \T3, \T3 - - vpclmulqdq $0x11, \T5, \XMM8, \T4 - vpxor \T4, \T6, \T6 - - vpclmulqdq $0x00, \T5, \XMM8, \T4 - vpxor \T4, \T7, \T7 - - vpclmulqdq $0x00, \T3, \T2, \T2 - - vpxor \T2, \XMM1, \XMM1 - vpxor \T6, \XMM1, \XMM1 - vpxor \T7, \XMM1, \T2 - - - - - vpslldq $8, \T2, \T4 - vpsrldq $8, \T2, \T2 - - vpxor \T4, \T7, \T7 - vpxor \T2, \T6, \T6 # holds the result of the - # accumulated carry-less multiplications - - ####################################################################### - #first phase of the reduction - vmovdqa POLY2(%rip), \T3 - - vpclmulqdq $0x01, \T7, \T3, \T2 - vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs - - vpxor \T2, \T7, \T7 # first phase of the reduction complete - ####################################################################### - - - #second phase of the reduction - vpclmulqdq $0x00, \T7, \T3, \T2 - vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R) - - vpclmulqdq $0x10, \T7, \T3, \T4 - vpslldq $4, \T4, \T4 # shift-L T4 1 DW (Shift-L 1-DW to obtain result with no shifts) - - vpxor \T2, \T4, \T4 # second phase of the reduction complete - ####################################################################### - vpxor \T4, \T6, \T6 # the result is in T6 -.endm - - - -# combined for GCM encrypt and decrypt functions -# clobbering all xmm registers -# clobbering r10, r11, r12, r13, r14, r15 -.macro GCM_ENC_DEC_AVX2 ENC_DEC - - #the number of pushes must equal STACK_OFFSET - push %r12 - push %r13 - push %r14 - push %r15 - - mov %rsp, %r14 - - - - - sub $VARIABLE_OFFSET, %rsp - and $~63, %rsp # align rsp to 64 bytes - - - vmovdqu HashKey(arg1), %xmm13 # xmm13 = HashKey - - mov arg4, %r13 # save the number of bytes of plaintext/ciphertext - and $-16, %r13 # r13 = r13 - (r13 mod 16) - - mov %r13, %r12 - shr $4, %r12 - and $7, %r12 - jz _initial_num_blocks_is_0\@ - - cmp $7, %r12 - je _initial_num_blocks_is_7\@ - cmp $6, %r12 - je _initial_num_blocks_is_6\@ - cmp $5, %r12 - je _initial_num_blocks_is_5\@ - cmp $4, %r12 - je _initial_num_blocks_is_4\@ - cmp $3, %r12 - je _initial_num_blocks_is_3\@ - cmp $2, %r12 - je _initial_num_blocks_is_2\@ - - jmp _initial_num_blocks_is_1\@ - -_initial_num_blocks_is_7\@: - INITIAL_BLOCKS_AVX2 7, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*7, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_6\@: - INITIAL_BLOCKS_AVX2 6, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*6, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_5\@: - INITIAL_BLOCKS_AVX2 5, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*5, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_4\@: - INITIAL_BLOCKS_AVX2 4, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*4, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_3\@: - INITIAL_BLOCKS_AVX2 3, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*3, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_2\@: - INITIAL_BLOCKS_AVX2 2, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*2, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_1\@: - INITIAL_BLOCKS_AVX2 1, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - sub $16*1, %r13 - jmp _initial_blocks_encrypted\@ - -_initial_num_blocks_is_0\@: - INITIAL_BLOCKS_AVX2 0, %xmm12, %xmm13, %xmm14, %xmm15, %xmm11, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm10, %xmm0, \ENC_DEC - - -_initial_blocks_encrypted\@: - cmp $0, %r13 - je _zero_cipher_left\@ - - sub $128, %r13 - je _eight_cipher_left\@ - - - + vpxor \XMM2, \T2, \T2 + vpxor \T5, \T3, \T3 - vmovd %xmm9, %r15d - and $255, %r15d - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + vpclmulqdq $0x11, \T5, \XMM2, \T4 + vpxor \T4, \T6, \T6 + vpclmulqdq $0x00, \T5, \XMM2, \T4 + vpxor \T4, \T7, \T7 -_encrypt_by_8_new\@: - cmp $(255-8), %r15d - jg _encrypt_by_8\@ + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 + ###################### - add $8, %r15b - GHASH_8_ENCRYPT_8_PARALLEL_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, out_order, \ENC_DEC - add $128, %r11 - sub $128, %r13 - jne _encrypt_by_8_new\@ + vmovdqa HashKey_6(arg1), \T5 + vpshufd $0b01001110, \XMM3, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM3, \T2, \T2 + vpxor \T5, \T3, \T3 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - jmp _eight_cipher_left\@ + vpclmulqdq $0x11, \T5, \XMM3, \T4 + vpxor \T4, \T6, \T6 -_encrypt_by_8\@: - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - add $8, %r15b - GHASH_8_ENCRYPT_8_PARALLEL_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm9, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8, %xmm15, in_order, \ENC_DEC - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - add $128, %r11 - sub $128, %r13 - jne _encrypt_by_8_new\@ + vpclmulqdq $0x00, \T5, \XMM3, \T4 + vpxor \T4, \T7, \T7 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 + ###################### + vmovdqa HashKey_5(arg1), \T5 + vpshufd $0b01001110, \XMM4, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM4, \T2, \T2 + vpxor \T5, \T3, \T3 -_eight_cipher_left\@: - GHASH_LAST_8_AVX2 %xmm0, %xmm10, %xmm11, %xmm12, %xmm13, %xmm14, %xmm15, %xmm1, %xmm2, %xmm3, %xmm4, %xmm5, %xmm6, %xmm7, %xmm8 + vpclmulqdq $0x11, \T5, \XMM4, \T4 + vpxor \T4, \T6, \T6 + vpclmulqdq $0x00, \T5, \XMM4, \T4 + vpxor \T4, \T7, \T7 -_zero_cipher_left\@: - cmp $16, arg4 - jl _only_less_than_16\@ + vpclmulqdq $0x00, \T3, \T2, \T2 - mov arg4, %r13 - and $15, %r13 # r13 = (arg4 mod 16) + vpxor \T2, \XMM1, \XMM1 - je _multiple_of_16_bytes\@ + ###################### - # handle the last <16 Byte block seperately + vmovdqa HashKey_4(arg1), \T5 + vpshufd $0b01001110, \XMM5, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM5, \T2, \T2 + vpxor \T5, \T3, \T3 + vpclmulqdq $0x11, \T5, \XMM5, \T4 + vpxor \T4, \T6, \T6 - vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) + vpclmulqdq $0x00, \T5, \XMM5, \T4 + vpxor \T4, \T7, \T7 - sub $16, %r11 - add %r13, %r11 - vmovdqu (arg3, %r11), %xmm1 # receive the last <16 Byte block + vpclmulqdq $0x00, \T3, \T2, \T2 - lea SHIFT_MASK+16(%rip), %r12 - sub %r13, %r12 # adjust the shuffle mask pointer - # to be able to shift 16-r13 bytes - # (r13 is the number of bytes in plaintext mod 16) - vmovdqu (%r12), %xmm2 # get the appropriate shuffle mask - vpshufb %xmm2, %xmm1, %xmm1 # shift right 16-r13 bytes - jmp _final_ghash_mul\@ + vpxor \T2, \XMM1, \XMM1 -_only_less_than_16\@: - # check for 0 length - mov arg4, %r13 - and $15, %r13 # r13 = (arg4 mod 16) + ###################### - je _multiple_of_16_bytes\@ + vmovdqa HashKey_3(arg1), \T5 + vpshufd $0b01001110, \XMM6, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM6, \T2, \T2 + vpxor \T5, \T3, \T3 - # handle the last <16 Byte block seperately + vpclmulqdq $0x11, \T5, \XMM6, \T4 + vpxor \T4, \T6, \T6 + vpclmulqdq $0x00, \T5, \XMM6, \T4 + vpxor \T4, \T7, \T7 - vpaddd ONE(%rip), %xmm9, %xmm9 # INCR CNT to get Yn - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Yn) + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 - lea SHIFT_MASK+16(%rip), %r12 - sub %r13, %r12 # adjust the shuffle mask pointer to be - # able to shift 16-r13 bytes (r13 is the - # number of bytes in plaintext mod 16) + ###################### -_get_last_16_byte_loop\@: - movb (arg3, %r11), %al - movb %al, TMP1 (%rsp , %r11) - add $1, %r11 - cmp %r13, %r11 - jne _get_last_16_byte_loop\@ + vmovdqa HashKey_2(arg1), \T5 + vpshufd $0b01001110, \XMM7, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM7, \T2, \T2 + vpxor \T5, \T3, \T3 - vmovdqu TMP1(%rsp), %xmm1 + vpclmulqdq $0x11, \T5, \XMM7, \T4 + vpxor \T4, \T6, \T6 - sub $16, %r11 + vpclmulqdq $0x00, \T5, \XMM7, \T4 + vpxor \T4, \T7, \T7 -_final_ghash_mul\@: - .if \ENC_DEC == DEC - vmovdqa %xmm1, %xmm2 - vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) - vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm2, %xmm2 - vpshufb SHUF_MASK(%rip), %xmm2, %xmm2 - vpxor %xmm2, %xmm14, %xmm14 - #GHASH computation for the last <16 Byte block - GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 - sub %r13, %r11 - add $16, %r11 - .else - vpxor %xmm1, %xmm9, %xmm9 # Plaintext XOR E(K, Yn) - vmovdqu ALL_F-SHIFT_MASK(%r12), %xmm1 # get the appropriate mask to mask out top 16-r13 bytes of xmm9 - vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 - vpxor %xmm9, %xmm14, %xmm14 - #GHASH computation for the last <16 Byte block - GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 - sub %r13, %r11 - add $16, %r11 - vpshufb SHUF_MASK(%rip), %xmm9, %xmm9 # shuffle xmm9 back to output as ciphertext - .endif + vpclmulqdq $0x00, \T3, \T2, \T2 + vpxor \T2, \XMM1, \XMM1 - ############################# - # output r13 Bytes - vmovq %xmm9, %rax - cmp $8, %r13 - jle _less_than_8_bytes_left\@ + ###################### - mov %rax, (arg2 , %r11) - add $8, %r11 - vpsrldq $8, %xmm9, %xmm9 - vmovq %xmm9, %rax - sub $8, %r13 + vmovdqa HashKey(arg1), \T5 + vpshufd $0b01001110, \XMM8, \T2 + vpshufd $0b01001110, \T5, \T3 + vpxor \XMM8, \T2, \T2 + vpxor \T5, \T3, \T3 -_less_than_8_bytes_left\@: - movb %al, (arg2 , %r11) - add $1, %r11 - shr $8, %rax - sub $1, %r13 - jne _less_than_8_bytes_left\@ - ############################# + vpclmulqdq $0x11, \T5, \XMM8, \T4 + vpxor \T4, \T6, \T6 -_multiple_of_16_bytes\@: - mov arg7, %r12 # r12 = aadLen (number of bytes) - shl $3, %r12 # convert into number of bits - vmovd %r12d, %xmm15 # len(A) in xmm15 + vpclmulqdq $0x00, \T5, \XMM8, \T4 + vpxor \T4, \T7, \T7 - shl $3, arg4 # len(C) in bits (*128) - vmovq arg4, %xmm1 - vpslldq $8, %xmm15, %xmm15 # xmm15 = len(A)|| 0x0000000000000000 - vpxor %xmm1, %xmm15, %xmm15 # xmm15 = len(A)||len(C) + vpclmulqdq $0x00, \T3, \T2, \T2 - vpxor %xmm15, %xmm14, %xmm14 - GHASH_MUL_AVX2 %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6 # final GHASH computation - vpshufb SHUF_MASK(%rip), %xmm14, %xmm14 # perform a 16Byte swap + vpxor \T2, \XMM1, \XMM1 + vpxor \T6, \XMM1, \XMM1 + vpxor \T7, \XMM1, \T2 - mov arg5, %rax # rax = *Y0 - vmovdqu (%rax), %xmm9 # xmm9 = Y0 - ENCRYPT_SINGLE_BLOCK %xmm9 # E(K, Y0) - vpxor %xmm14, %xmm9, %xmm9 + vpslldq $8, \T2, \T4 + vpsrldq $8, \T2, \T2 + vpxor \T4, \T7, \T7 + vpxor \T2, \T6, \T6 # holds the result of the + # accumulated carry-less multiplications -_return_T\@: - mov arg8, %r10 # r10 = authTag - mov arg9, %r11 # r11 = auth_tag_len + ####################################################################### + #first phase of the reduction + vmovdqa POLY2(%rip), \T3 - cmp $16, %r11 - je _T_16\@ + vpclmulqdq $0x01, \T7, \T3, \T2 + vpslldq $8, \T2, \T2 # shift-L xmm2 2 DWs - cmp $8, %r11 - jl _T_4\@ + vpxor \T2, \T7, \T7 # first phase of the reduction complete + ####################################################################### -_T_8\@: - vmovq %xmm9, %rax - mov %rax, (%r10) - add $8, %r10 - sub $8, %r11 - vpsrldq $8, %xmm9, %xmm9 - cmp $0, %r11 - je _return_T_done\@ -_T_4\@: - vmovd %xmm9, %eax - mov %eax, (%r10) - add $4, %r10 - sub $4, %r11 - vpsrldq $4, %xmm9, %xmm9 - cmp $0, %r11 - je _return_T_done\@ -_T_123\@: - vmovd %xmm9, %eax - cmp $2, %r11 - jl _T_1\@ - mov %ax, (%r10) - cmp $2, %r11 - je _return_T_done\@ - add $2, %r10 - sar $16, %eax -_T_1\@: - mov %al, (%r10) - jmp _return_T_done\@ -_T_16\@: - vmovdqu %xmm9, (%r10) + #second phase of the reduction + vpclmulqdq $0x00, \T7, \T3, \T2 + vpsrldq $4, \T2, \T2 # shift-R T2 1 DW (Shift-R only 1-DW to obtain 2-DWs shift-R) -_return_T_done\@: - mov %r14, %rsp + vpclmulqdq $0x10, \T7, \T3, \T4 + vpslldq $4, \T4, \T4 # shift-L T4 1 DW (Shift-L 1-DW to obtain result with no shifts) - pop %r15 - pop %r14 - pop %r13 - pop %r12 + vpxor \T2, \T4, \T4 # second phase of the reduction complete + ####################################################################### + vpxor \T4, \T6, \T6 # the result is in T6 .endm + ############################################################# #void aesni_gcm_precomp_avx_gen4 # (gcm_data *my_ctx_data, @@ -2918,7 +2603,7 @@ ENDPROC(aesni_gcm_precomp_avx_gen4) # Valid values are 16 (most likely), 12 or 8. */ ############################################################################### ENTRY(aesni_gcm_enc_avx_gen4) - GCM_ENC_DEC_AVX2 ENC + GCM_ENC_DEC INITIAL_BLOCKS_AVX2 GHASH_8_ENCRYPT_8_PARALLEL_AVX2 GHASH_LAST_8_AVX2 GHASH_MUL_AVX2 ENC ret ENDPROC(aesni_gcm_enc_avx_gen4) @@ -2939,7 +2624,7 @@ ENDPROC(aesni_gcm_enc_avx_gen4) # Valid values are 16 (most likely), 12 or 8. */ ############################################################################### ENTRY(aesni_gcm_dec_avx_gen4) - GCM_ENC_DEC_AVX2 DEC + GCM_ENC_DEC INITIAL_BLOCKS_AVX2 GHASH_8_ENCRYPT_8_PARALLEL_AVX2 GHASH_LAST_8_AVX2 GHASH_MUL_AVX2 DEC ret ENDPROC(aesni_gcm_dec_avx_gen4) -- cgit v1.2.3