[PATCH v2 01/14] x86/crypto: aesni: Merge INITIAL_BLOCKS_ENC/DEC
From: Dave Watson
Date: Wed Feb 14 2018 - 12:38:48 EST
Use macro operations to merge implemetations of INITIAL_BLOCKS,
since they differ by only a small handful of lines.
Use macro counter \@ to simplify implementation.
Signed-off-by: Dave Watson <davejwatson@xxxxxx>
---
arch/x86/crypto/aesni-intel_asm.S | 298 ++++++--------------------------------
1 file changed, 48 insertions(+), 250 deletions(-)
diff --git a/arch/x86/crypto/aesni-intel_asm.S b/arch/x86/crypto/aesni-intel_asm.S
index 76d8cd4..48911fe 100644
--- a/arch/x86/crypto/aesni-intel_asm.S
+++ b/arch/x86/crypto/aesni-intel_asm.S
@@ -275,234 +275,7 @@ _done_read_partial_block_\@:
*/
-.macro INITIAL_BLOCKS_DEC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
-XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
- MOVADQ SHUF_MASK(%rip), %xmm14
- mov arg7, %r10 # %r10 = AAD
- mov arg8, %r11 # %r11 = aadLen
- pxor %xmm\i, %xmm\i
- pxor \XMM2, \XMM2
-
- cmp $16, %r11
- jl _get_AAD_rest\num_initial_blocks\operation
-_get_AAD_blocks\num_initial_blocks\operation:
- movdqu (%r10), %xmm\i
- PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
- pxor %xmm\i, \XMM2
- GHASH_MUL \XMM2, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
- add $16, %r10
- sub $16, %r11
- cmp $16, %r11
- jge _get_AAD_blocks\num_initial_blocks\operation
-
- movdqu \XMM2, %xmm\i
-
- /* read the last <16B of AAD */
-_get_AAD_rest\num_initial_blocks\operation:
- cmp $0, %r11
- je _get_AAD_done\num_initial_blocks\operation
-
- READ_PARTIAL_BLOCK %r10, %r11, \TMP1, %xmm\i
- PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
- pxor \XMM2, %xmm\i
- GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
-
-_get_AAD_done\num_initial_blocks\operation:
- xor %r11, %r11 # initialise the data pointer offset as zero
- # start AES for num_initial_blocks blocks
-
- mov %arg5, %rax # %rax = *Y0
- movdqu (%rax), \XMM0 # XMM0 = Y0
- PSHUFB_XMM %xmm14, \XMM0
-
-.if (\i == 5) || (\i == 6) || (\i == 7)
- MOVADQ ONE(%RIP),\TMP1
- MOVADQ (%arg1),\TMP2
-.irpc index, \i_seq
- paddd \TMP1, \XMM0 # INCR Y0
- movdqa \XMM0, %xmm\index
- PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
- pxor \TMP2, %xmm\index
-.endr
- lea 0x10(%arg1),%r10
- mov keysize,%eax
- shr $2,%eax # 128->4, 192->6, 256->8
- add $5,%eax # 128->9, 192->11, 256->13
-
-aes_loop_initial_dec\num_initial_blocks:
- MOVADQ (%r10),\TMP1
-.irpc index, \i_seq
- AESENC \TMP1, %xmm\index
-.endr
- add $16,%r10
- sub $1,%eax
- jnz aes_loop_initial_dec\num_initial_blocks
-
- MOVADQ (%r10), \TMP1
-.irpc index, \i_seq
- AESENCLAST \TMP1, %xmm\index # Last Round
-.endr
-.irpc index, \i_seq
- movdqu (%arg3 , %r11, 1), \TMP1
- pxor \TMP1, %xmm\index
- movdqu %xmm\index, (%arg2 , %r11, 1)
- # write back plaintext/ciphertext for num_initial_blocks
- add $16, %r11
-
- movdqa \TMP1, %xmm\index
- PSHUFB_XMM %xmm14, %xmm\index
- # prepare plaintext/ciphertext for GHASH computation
-.endr
-.endif
-
- # apply GHASH on num_initial_blocks blocks
-
-.if \i == 5
- pxor %xmm5, %xmm6
- GHASH_MUL %xmm6, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
- pxor %xmm6, %xmm7
- GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
- pxor %xmm7, %xmm8
- GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
-.elseif \i == 6
- pxor %xmm6, %xmm7
- GHASH_MUL %xmm7, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
- pxor %xmm7, %xmm8
- GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
-.elseif \i == 7
- pxor %xmm7, %xmm8
- GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
-.endif
- cmp $64, %r13
- jl _initial_blocks_done\num_initial_blocks\operation
- # no need for precomputed values
-/*
-*
-* Precomputations for HashKey parallel with encryption of first 4 blocks.
-* Haskey_i_k holds XORed values of the low and high parts of the Haskey_i
-*/
- MOVADQ ONE(%rip), \TMP1
- paddd \TMP1, \XMM0 # INCR Y0
- MOVADQ \XMM0, \XMM1
- PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
-
- paddd \TMP1, \XMM0 # INCR Y0
- MOVADQ \XMM0, \XMM2
- PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
-
- paddd \TMP1, \XMM0 # INCR Y0
- MOVADQ \XMM0, \XMM3
- PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
-
- paddd \TMP1, \XMM0 # INCR Y0
- MOVADQ \XMM0, \XMM4
- PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
-
- MOVADQ 0(%arg1),\TMP1
- pxor \TMP1, \XMM1
- pxor \TMP1, \XMM2
- pxor \TMP1, \XMM3
- pxor \TMP1, \XMM4
- movdqa \TMP3, \TMP5
- pshufd $78, \TMP3, \TMP1
- pxor \TMP3, \TMP1
- movdqa \TMP1, HashKey_k(%rsp)
- GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
-# TMP5 = HashKey^2<<1 (mod poly)
- movdqa \TMP5, HashKey_2(%rsp)
-# HashKey_2 = HashKey^2<<1 (mod poly)
- pshufd $78, \TMP5, \TMP1
- pxor \TMP5, \TMP1
- movdqa \TMP1, HashKey_2_k(%rsp)
-.irpc index, 1234 # do 4 rounds
- movaps 0x10*\index(%arg1), \TMP1
- AESENC \TMP1, \XMM1
- AESENC \TMP1, \XMM2
- AESENC \TMP1, \XMM3
- AESENC \TMP1, \XMM4
-.endr
- GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
-# TMP5 = HashKey^3<<1 (mod poly)
- movdqa \TMP5, HashKey_3(%rsp)
- pshufd $78, \TMP5, \TMP1
- pxor \TMP5, \TMP1
- movdqa \TMP1, HashKey_3_k(%rsp)
-.irpc index, 56789 # do next 5 rounds
- movaps 0x10*\index(%arg1), \TMP1
- AESENC \TMP1, \XMM1
- AESENC \TMP1, \XMM2
- AESENC \TMP1, \XMM3
- AESENC \TMP1, \XMM4
-.endr
- GHASH_MUL \TMP5, \TMP3, \TMP1, \TMP2, \TMP4, \TMP6, \TMP7
-# TMP5 = HashKey^3<<1 (mod poly)
- movdqa \TMP5, HashKey_4(%rsp)
- pshufd $78, \TMP5, \TMP1
- pxor \TMP5, \TMP1
- movdqa \TMP1, HashKey_4_k(%rsp)
- lea 0xa0(%arg1),%r10
- mov keysize,%eax
- shr $2,%eax # 128->4, 192->6, 256->8
- sub $4,%eax # 128->0, 192->2, 256->4
- jz aes_loop_pre_dec_done\num_initial_blocks
-
-aes_loop_pre_dec\num_initial_blocks:
- MOVADQ (%r10),\TMP2
-.irpc index, 1234
- AESENC \TMP2, %xmm\index
-.endr
- add $16,%r10
- sub $1,%eax
- jnz aes_loop_pre_dec\num_initial_blocks
-
-aes_loop_pre_dec_done\num_initial_blocks:
- MOVADQ (%r10), \TMP2
- AESENCLAST \TMP2, \XMM1
- AESENCLAST \TMP2, \XMM2
- AESENCLAST \TMP2, \XMM3
- AESENCLAST \TMP2, \XMM4
- movdqu 16*0(%arg3 , %r11 , 1), \TMP1
- pxor \TMP1, \XMM1
- movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
- movdqa \TMP1, \XMM1
- movdqu 16*1(%arg3 , %r11 , 1), \TMP1
- pxor \TMP1, \XMM2
- movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
- movdqa \TMP1, \XMM2
- movdqu 16*2(%arg3 , %r11 , 1), \TMP1
- pxor \TMP1, \XMM3
- movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
- movdqa \TMP1, \XMM3
- movdqu 16*3(%arg3 , %r11 , 1), \TMP1
- pxor \TMP1, \XMM4
- movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
- movdqa \TMP1, \XMM4
- add $64, %r11
- PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
- pxor \XMMDst, \XMM1
-# combine GHASHed value with the corresponding ciphertext
- PSHUFB_XMM %xmm14, \XMM2 # perform a 16 byte swap
- PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
- PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
-
-_initial_blocks_done\num_initial_blocks\operation:
-
-.endm
-
-
-/*
-* 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, %xmm5, %xmm6, %xmm7, %xmm8, %xmm9 registers
-* are clobbered
-* arg1, %arg2, %arg3, %r14 are used as a pointer only, not modified
-*/
-
-
-.macro INITIAL_BLOCKS_ENC num_initial_blocks TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
+.macro INITIAL_BLOCKS_ENC_DEC TMP1 TMP2 TMP3 TMP4 TMP5 XMM0 XMM1 \
XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
MOVADQ SHUF_MASK(%rip), %xmm14
mov arg7, %r10 # %r10 = AAD
@@ -511,8 +284,8 @@ XMM2 XMM3 XMM4 XMMDst TMP6 TMP7 i i_seq operation
pxor \XMM2, \XMM2
cmp $16, %r11
- jl _get_AAD_rest\num_initial_blocks\operation
-_get_AAD_blocks\num_initial_blocks\operation:
+ jl _get_AAD_rest\@
+_get_AAD_blocks\@:
movdqu (%r10), %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor %xmm\i, \XMM2
@@ -520,21 +293,21 @@ _get_AAD_blocks\num_initial_blocks\operation:
add $16, %r10
sub $16, %r11
cmp $16, %r11
- jge _get_AAD_blocks\num_initial_blocks\operation
+ jge _get_AAD_blocks\@
movdqu \XMM2, %xmm\i
/* read the last <16B of AAD */
-_get_AAD_rest\num_initial_blocks\operation:
+_get_AAD_rest\@:
cmp $0, %r11
- je _get_AAD_done\num_initial_blocks\operation
+ je _get_AAD_done\@
READ_PARTIAL_BLOCK %r10, %r11, \TMP1, %xmm\i
PSHUFB_XMM %xmm14, %xmm\i # byte-reflect the AAD data
pxor \XMM2, %xmm\i
GHASH_MUL %xmm\i, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
-_get_AAD_done\num_initial_blocks\operation:
+_get_AAD_done\@:
xor %r11, %r11 # initialise the data pointer offset as zero
# start AES for num_initial_blocks blocks
@@ -548,7 +321,11 @@ _get_AAD_done\num_initial_blocks\operation:
MOVADQ 0(%arg1),\TMP2
.irpc index, \i_seq
paddd \TMP1, \XMM0 # INCR Y0
+.ifc \operation, dec
+ movdqa \XMM0, %xmm\index
+.else
MOVADQ \XMM0, %xmm\index
+.endif
PSHUFB_XMM %xmm14, %xmm\index # perform a 16 byte swap
pxor \TMP2, %xmm\index
.endr
@@ -557,14 +334,14 @@ _get_AAD_done\num_initial_blocks\operation:
shr $2,%eax # 128->4, 192->6, 256->8
add $5,%eax # 128->9, 192->11, 256->13
-aes_loop_initial_enc\num_initial_blocks:
+aes_loop_initial_\@:
MOVADQ (%r10),\TMP1
.irpc index, \i_seq
AESENC \TMP1, %xmm\index
.endr
add $16,%r10
sub $1,%eax
- jnz aes_loop_initial_enc\num_initial_blocks
+ jnz aes_loop_initial_\@
MOVADQ (%r10), \TMP1
.irpc index, \i_seq
@@ -576,6 +353,10 @@ aes_loop_initial_enc\num_initial_blocks:
movdqu %xmm\index, (%arg2 , %r11, 1)
# write back plaintext/ciphertext for num_initial_blocks
add $16, %r11
+
+.ifc \operation, dec
+ movdqa \TMP1, %xmm\index
+.endif
PSHUFB_XMM %xmm14, %xmm\index
# prepare plaintext/ciphertext for GHASH computation
@@ -601,7 +382,7 @@ aes_loop_initial_enc\num_initial_blocks:
GHASH_MUL %xmm8, \TMP3, \TMP1, \TMP2, \TMP4, \TMP5, \XMM1
.endif
cmp $64, %r13
- jl _initial_blocks_done\num_initial_blocks\operation
+ jl _initial_blocks_done\@
# no need for precomputed values
/*
*
@@ -671,18 +452,18 @@ aes_loop_initial_enc\num_initial_blocks:
mov keysize,%eax
shr $2,%eax # 128->4, 192->6, 256->8
sub $4,%eax # 128->0, 192->2, 256->4
- jz aes_loop_pre_enc_done\num_initial_blocks
+ jz aes_loop_pre_done\@
-aes_loop_pre_enc\num_initial_blocks:
+aes_loop_pre_\@:
MOVADQ (%r10),\TMP2
.irpc index, 1234
AESENC \TMP2, %xmm\index
.endr
add $16,%r10
sub $1,%eax
- jnz aes_loop_pre_enc\num_initial_blocks
+ jnz aes_loop_pre_\@
-aes_loop_pre_enc_done\num_initial_blocks:
+aes_loop_pre_done\@:
MOVADQ (%r10), \TMP2
AESENCLAST \TMP2, \XMM1
AESENCLAST \TMP2, \XMM2
@@ -690,16 +471,33 @@ aes_loop_pre_enc_done\num_initial_blocks:
AESENCLAST \TMP2, \XMM4
movdqu 16*0(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM1
+.ifc \operation, dec
+ movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
+ movdqa \TMP1, \XMM1
+.endif
movdqu 16*1(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM2
+.ifc \operation, dec
+ movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
+ movdqa \TMP1, \XMM2
+.endif
movdqu 16*2(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM3
+.ifc \operation, dec
+ movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
+ movdqa \TMP1, \XMM3
+.endif
movdqu 16*3(%arg3 , %r11 , 1), \TMP1
pxor \TMP1, \XMM4
+.ifc \operation, dec
+ movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
+ movdqa \TMP1, \XMM4
+.else
movdqu \XMM1, 16*0(%arg2 , %r11 , 1)
movdqu \XMM2, 16*1(%arg2 , %r11 , 1)
movdqu \XMM3, 16*2(%arg2 , %r11 , 1)
movdqu \XMM4, 16*3(%arg2 , %r11 , 1)
+.endif
add $64, %r11
PSHUFB_XMM %xmm14, \XMM1 # perform a 16 byte swap
@@ -709,7 +507,7 @@ aes_loop_pre_enc_done\num_initial_blocks:
PSHUFB_XMM %xmm14, \XMM3 # perform a 16 byte swap
PSHUFB_XMM %xmm14, \XMM4 # perform a 16 byte swap
-_initial_blocks_done\num_initial_blocks\operation:
+_initial_blocks_done\@:
.endm
@@ -1378,22 +1176,22 @@ ENTRY(aesni_gcm_dec)
jb _initial_num_blocks_is_1_decrypt
je _initial_num_blocks_is_2_decrypt
_initial_num_blocks_is_3_decrypt:
- INITIAL_BLOCKS_DEC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, dec
sub $48, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_2_decrypt:
- INITIAL_BLOCKS_DEC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, dec
sub $32, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_1_decrypt:
- INITIAL_BLOCKS_DEC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, dec
sub $16, %r13
jmp _initial_blocks_decrypted
_initial_num_blocks_is_0_decrypt:
- INITIAL_BLOCKS_DEC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, dec
_initial_blocks_decrypted:
cmp $0, %r13
@@ -1640,22 +1438,22 @@ ENTRY(aesni_gcm_enc)
jb _initial_num_blocks_is_1_encrypt
je _initial_num_blocks_is_2_encrypt
_initial_num_blocks_is_3_encrypt:
- INITIAL_BLOCKS_ENC 3, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 5, 678, enc
sub $48, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_2_encrypt:
- INITIAL_BLOCKS_ENC 2, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 6, 78, enc
sub $32, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_1_encrypt:
- INITIAL_BLOCKS_ENC 1, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 7, 8, enc
sub $16, %r13
jmp _initial_blocks_encrypted
_initial_num_blocks_is_0_encrypt:
- INITIAL_BLOCKS_ENC 0, %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
+ INITIAL_BLOCKS_ENC_DEC %xmm9, %xmm10, %xmm13, %xmm11, %xmm12, %xmm0, \
%xmm1, %xmm2, %xmm3, %xmm4, %xmm8, %xmm5, %xmm6, 8, 0, enc
_initial_blocks_encrypted:
--
2.9.5