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Diffstat (limited to 'src/crypto/aes/asm/aesni-x86_64.pl')
-rw-r--r--src/crypto/aes/asm/aesni-x86_64.pl945
1 files changed, 719 insertions, 226 deletions
diff --git a/src/crypto/aes/asm/aesni-x86_64.pl b/src/crypto/aes/asm/aesni-x86_64.pl
index 5f61746..25ca574 100644
--- a/src/crypto/aes/asm/aesni-x86_64.pl
+++ b/src/crypto/aes/asm/aesni-x86_64.pl
@@ -165,11 +165,11 @@
# Westmere 3.77/1.25 1.25 1.25 1.26
# * Bridge 5.07/0.74 0.75 0.90 0.85
# Haswell 4.44/0.63 0.63 0.73 0.63
-# Atom 5.75/3.54 3.56 4.12 3.87(*)
+# Silvermont 5.75/3.54 3.56 4.12 3.87(*)
# Bulldozer 5.77/0.70 0.72 0.90 0.70
#
-# (*) Atom ECB result is suboptimal because of penalties incurred
-# by operations on %xmm8-15. As ECB is not considered
+# (*) Atom Silvermont ECB result is suboptimal because of penalties
+# incurred by operations on %xmm8-15. As ECB is not considered
# critical, nothing was done to mitigate the problem.
$PREFIX="aesni"; # if $PREFIX is set to "AES", the script
@@ -263,7 +263,10 @@ ${PREFIX}_encrypt:
___
&aesni_generate1("enc",$key,$rounds);
$code.=<<___;
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
movups $inout0,($out) # output
+ pxor $inout0,$inout0
ret
.size ${PREFIX}_encrypt,.-${PREFIX}_encrypt
@@ -276,7 +279,10 @@ ${PREFIX}_decrypt:
___
&aesni_generate1("dec",$key,$rounds);
$code.=<<___;
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
movups $inout0,($out) # output
+ pxor $inout0,$inout0
ret
.size ${PREFIX}_decrypt, .-${PREFIX}_decrypt
___
@@ -445,21 +451,18 @@ _aesni_${dir}rypt6:
pxor $rndkey0,$inout4
aes${dir} $rndkey1,$inout2
pxor $rndkey0,$inout5
+ $movkey ($key,%rax),$rndkey0
add \$16,%rax
- aes${dir} $rndkey1,$inout3
- aes${dir} $rndkey1,$inout4
- aes${dir} $rndkey1,$inout5
- $movkey -16($key,%rax),$rndkey0
jmp .L${dir}_loop6_enter
.align 16
.L${dir}_loop6:
aes${dir} $rndkey1,$inout0
aes${dir} $rndkey1,$inout1
aes${dir} $rndkey1,$inout2
+.L${dir}_loop6_enter:
aes${dir} $rndkey1,$inout3
aes${dir} $rndkey1,$inout4
aes${dir} $rndkey1,$inout5
-.L${dir}_loop6_enter:
$movkey ($key,%rax),$rndkey1
add \$32,%rax
aes${dir} $rndkey0,$inout0
@@ -506,23 +509,18 @@ _aesni_${dir}rypt8:
lea 32($key,$rounds),$key
neg %rax # $rounds
aes${dir} $rndkey1,$inout0
- add \$16,%rax
pxor $rndkey0,$inout5
- aes${dir} $rndkey1,$inout1
pxor $rndkey0,$inout6
+ aes${dir} $rndkey1,$inout1
pxor $rndkey0,$inout7
- aes${dir} $rndkey1,$inout2
- aes${dir} $rndkey1,$inout3
- aes${dir} $rndkey1,$inout4
- aes${dir} $rndkey1,$inout5
- aes${dir} $rndkey1,$inout6
- aes${dir} $rndkey1,$inout7
- $movkey -16($key,%rax),$rndkey0
- jmp .L${dir}_loop8_enter
+ $movkey ($key,%rax),$rndkey0
+ add \$16,%rax
+ jmp .L${dir}_loop8_inner
.align 16
.L${dir}_loop8:
aes${dir} $rndkey1,$inout0
aes${dir} $rndkey1,$inout1
+.L${dir}_loop8_inner:
aes${dir} $rndkey1,$inout2
aes${dir} $rndkey1,$inout3
aes${dir} $rndkey1,$inout4
@@ -587,15 +585,15 @@ aesni_ecb_encrypt:
___
$code.=<<___ if ($win64);
lea -0x58(%rsp),%rsp
- movaps %xmm6,(%rsp)
+ movaps %xmm6,(%rsp) # offload $inout4..7
movaps %xmm7,0x10(%rsp)
movaps %xmm8,0x20(%rsp)
movaps %xmm9,0x30(%rsp)
.Lecb_enc_body:
___
$code.=<<___;
- and \$-16,$len
- jz .Lecb_ret
+ and \$-16,$len # if ($len<16)
+ jz .Lecb_ret # return
mov 240($key),$rounds # key->rounds
$movkey ($key),$rndkey0
@@ -604,10 +602,10 @@ $code.=<<___;
test %r8d,%r8d # 5th argument
jz .Lecb_decrypt
#--------------------------- ECB ENCRYPT ------------------------------#
- cmp \$0x80,$len
- jb .Lecb_enc_tail
+ cmp \$0x80,$len # if ($len<8*16)
+ jb .Lecb_enc_tail # short input
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # load 8 input blocks
movdqu 0x10($inp),$inout1
movdqu 0x20($inp),$inout2
movdqu 0x30($inp),$inout3
@@ -615,14 +613,14 @@ $code.=<<___;
movdqu 0x50($inp),$inout5
movdqu 0x60($inp),$inout6
movdqu 0x70($inp),$inout7
- lea 0x80($inp),$inp
- sub \$0x80,$len
+ lea 0x80($inp),$inp # $inp+=8*16
+ sub \$0x80,$len # $len-=8*16 (can be zero)
jmp .Lecb_enc_loop8_enter
.align 16
.Lecb_enc_loop8:
- movups $inout0,($out)
+ movups $inout0,($out) # store 8 output blocks
mov $key_,$key # restore $key
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # load 8 input blocks
mov $rnds_,$rounds # restore $rounds
movups $inout1,0x10($out)
movdqu 0x10($inp),$inout1
@@ -637,17 +635,17 @@ $code.=<<___;
movups $inout6,0x60($out)
movdqu 0x60($inp),$inout6
movups $inout7,0x70($out)
- lea 0x80($out),$out
+ lea 0x80($out),$out # $out+=8*16
movdqu 0x70($inp),$inout7
- lea 0x80($inp),$inp
+ lea 0x80($inp),$inp # $inp+=8*16
.Lecb_enc_loop8_enter:
call _aesni_encrypt8
sub \$0x80,$len
- jnc .Lecb_enc_loop8
+ jnc .Lecb_enc_loop8 # loop if $len-=8*16 didn't borrow
- movups $inout0,($out)
+ movups $inout0,($out) # store 8 output blocks
mov $key_,$key # restore $key
movups $inout1,0x10($out)
mov $rnds_,$rounds # restore $rounds
@@ -657,11 +655,11 @@ $code.=<<___;
movups $inout5,0x50($out)
movups $inout6,0x60($out)
movups $inout7,0x70($out)
- lea 0x80($out),$out
- add \$0x80,$len
- jz .Lecb_ret
+ lea 0x80($out),$out # $out+=8*16
+ add \$0x80,$len # restore real remaining $len
+ jz .Lecb_ret # done if ($len==0)
-.Lecb_enc_tail:
+.Lecb_enc_tail: # $len is less than 8*16
movups ($inp),$inout0
cmp \$0x20,$len
jb .Lecb_enc_one
@@ -678,8 +676,9 @@ $code.=<<___;
movups 0x50($inp),$inout5
je .Lecb_enc_six
movdqu 0x60($inp),$inout6
+ xorps $inout7,$inout7
call _aesni_encrypt8
- movups $inout0,($out)
+ movups $inout0,($out) # store 7 output blocks
movups $inout1,0x10($out)
movups $inout2,0x20($out)
movups $inout3,0x30($out)
@@ -692,25 +691,25 @@ $code.=<<___;
___
&aesni_generate1("enc",$key,$rounds);
$code.=<<___;
- movups $inout0,($out)
+ movups $inout0,($out) # store one output block
jmp .Lecb_ret
.align 16
.Lecb_enc_two:
call _aesni_encrypt2
- movups $inout0,($out)
+ movups $inout0,($out) # store 2 output blocks
movups $inout1,0x10($out)
jmp .Lecb_ret
.align 16
.Lecb_enc_three:
call _aesni_encrypt3
- movups $inout0,($out)
+ movups $inout0,($out) # store 3 output blocks
movups $inout1,0x10($out)
movups $inout2,0x20($out)
jmp .Lecb_ret
.align 16
.Lecb_enc_four:
call _aesni_encrypt4
- movups $inout0,($out)
+ movups $inout0,($out) # store 4 output blocks
movups $inout1,0x10($out)
movups $inout2,0x20($out)
movups $inout3,0x30($out)
@@ -719,7 +718,7 @@ $code.=<<___;
.Lecb_enc_five:
xorps $inout5,$inout5
call _aesni_encrypt6
- movups $inout0,($out)
+ movups $inout0,($out) # store 5 output blocks
movups $inout1,0x10($out)
movups $inout2,0x20($out)
movups $inout3,0x30($out)
@@ -728,7 +727,7 @@ $code.=<<___;
.align 16
.Lecb_enc_six:
call _aesni_encrypt6
- movups $inout0,($out)
+ movups $inout0,($out) # store 6 output blocks
movups $inout1,0x10($out)
movups $inout2,0x20($out)
movups $inout3,0x30($out)
@@ -738,10 +737,10 @@ $code.=<<___;
#--------------------------- ECB DECRYPT ------------------------------#
.align 16
.Lecb_decrypt:
- cmp \$0x80,$len
- jb .Lecb_dec_tail
+ cmp \$0x80,$len # if ($len<8*16)
+ jb .Lecb_dec_tail # short input
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # load 8 input blocks
movdqu 0x10($inp),$inout1
movdqu 0x20($inp),$inout2
movdqu 0x30($inp),$inout3
@@ -749,14 +748,14 @@ $code.=<<___;
movdqu 0x50($inp),$inout5
movdqu 0x60($inp),$inout6
movdqu 0x70($inp),$inout7
- lea 0x80($inp),$inp
- sub \$0x80,$len
+ lea 0x80($inp),$inp # $inp+=8*16
+ sub \$0x80,$len # $len-=8*16 (can be zero)
jmp .Lecb_dec_loop8_enter
.align 16
.Lecb_dec_loop8:
- movups $inout0,($out)
+ movups $inout0,($out) # store 8 output blocks
mov $key_,$key # restore $key
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # load 8 input blocks
mov $rnds_,$rounds # restore $rounds
movups $inout1,0x10($out)
movdqu 0x10($inp),$inout1
@@ -771,30 +770,38 @@ $code.=<<___;
movups $inout6,0x60($out)
movdqu 0x60($inp),$inout6
movups $inout7,0x70($out)
- lea 0x80($out),$out
+ lea 0x80($out),$out # $out+=8*16
movdqu 0x70($inp),$inout7
- lea 0x80($inp),$inp
+ lea 0x80($inp),$inp # $inp+=8*16
.Lecb_dec_loop8_enter:
call _aesni_decrypt8
$movkey ($key_),$rndkey0
sub \$0x80,$len
- jnc .Lecb_dec_loop8
+ jnc .Lecb_dec_loop8 # loop if $len-=8*16 didn't borrow
- movups $inout0,($out)
+ movups $inout0,($out) # store 8 output blocks
+ pxor $inout0,$inout0 # clear register bank
mov $key_,$key # restore $key
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
mov $rnds_,$rounds # restore $rounds
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
movups $inout3,0x30($out)
+ pxor $inout3,$inout3
movups $inout4,0x40($out)
+ pxor $inout4,$inout4
movups $inout5,0x50($out)
+ pxor $inout5,$inout5
movups $inout6,0x60($out)
+ pxor $inout6,$inout6
movups $inout7,0x70($out)
- lea 0x80($out),$out
- add \$0x80,$len
- jz .Lecb_ret
+ pxor $inout7,$inout7
+ lea 0x80($out),$out # $out+=8*16
+ add \$0x80,$len # restore real remaining $len
+ jz .Lecb_ret # done if ($len==0)
.Lecb_dec_tail:
movups ($inp),$inout0
@@ -814,70 +821,107 @@ $code.=<<___;
je .Lecb_dec_six
movups 0x60($inp),$inout6
$movkey ($key),$rndkey0
+ xorps $inout7,$inout7
call _aesni_decrypt8
- movups $inout0,($out)
+ movups $inout0,($out) # store 7 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
movups $inout3,0x30($out)
+ pxor $inout3,$inout3
movups $inout4,0x40($out)
+ pxor $inout4,$inout4
movups $inout5,0x50($out)
+ pxor $inout5,$inout5
movups $inout6,0x60($out)
+ pxor $inout6,$inout6
+ pxor $inout7,$inout7
jmp .Lecb_ret
.align 16
.Lecb_dec_one:
___
&aesni_generate1("dec",$key,$rounds);
$code.=<<___;
- movups $inout0,($out)
+ movups $inout0,($out) # store one output block
+ pxor $inout0,$inout0 # clear register bank
jmp .Lecb_ret
.align 16
.Lecb_dec_two:
call _aesni_decrypt2
- movups $inout0,($out)
+ movups $inout0,($out) # store 2 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
jmp .Lecb_ret
.align 16
.Lecb_dec_three:
call _aesni_decrypt3
- movups $inout0,($out)
+ movups $inout0,($out) # store 3 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
jmp .Lecb_ret
.align 16
.Lecb_dec_four:
call _aesni_decrypt4
- movups $inout0,($out)
+ movups $inout0,($out) # store 4 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
movups $inout3,0x30($out)
+ pxor $inout3,$inout3
jmp .Lecb_ret
.align 16
.Lecb_dec_five:
xorps $inout5,$inout5
call _aesni_decrypt6
- movups $inout0,($out)
+ movups $inout0,($out) # store 5 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
movups $inout3,0x30($out)
+ pxor $inout3,$inout3
movups $inout4,0x40($out)
+ pxor $inout4,$inout4
+ pxor $inout5,$inout5
jmp .Lecb_ret
.align 16
.Lecb_dec_six:
call _aesni_decrypt6
- movups $inout0,($out)
+ movups $inout0,($out) # store 6 output blocks
+ pxor $inout0,$inout0 # clear register bank
movups $inout1,0x10($out)
+ pxor $inout1,$inout1
movups $inout2,0x20($out)
+ pxor $inout2,$inout2
movups $inout3,0x30($out)
+ pxor $inout3,$inout3
movups $inout4,0x40($out)
+ pxor $inout4,$inout4
movups $inout5,0x50($out)
+ pxor $inout5,$inout5
.Lecb_ret:
+ xorps $rndkey0,$rndkey0 # %xmm0
+ pxor $rndkey1,$rndkey1
___
$code.=<<___ if ($win64);
movaps (%rsp),%xmm6
+ movaps %xmm0,(%rsp) # clear stack
movaps 0x10(%rsp),%xmm7
+ movaps %xmm0,0x10(%rsp)
movaps 0x20(%rsp),%xmm8
+ movaps %xmm0,0x20(%rsp)
movaps 0x30(%rsp),%xmm9
+ movaps %xmm0,0x30(%rsp)
lea 0x58(%rsp),%rsp
.Lecb_enc_ret:
___
@@ -911,10 +955,10 @@ aesni_ccm64_encrypt_blocks:
___
$code.=<<___ if ($win64);
lea -0x58(%rsp),%rsp
- movaps %xmm6,(%rsp)
- movaps %xmm7,0x10(%rsp)
- movaps %xmm8,0x20(%rsp)
- movaps %xmm9,0x30(%rsp)
+ movaps %xmm6,(%rsp) # $iv
+ movaps %xmm7,0x10(%rsp) # $bswap_mask
+ movaps %xmm8,0x20(%rsp) # $in0
+ movaps %xmm9,0x30(%rsp) # $increment
.Lccm64_enc_body:
___
$code.=<<___;
@@ -956,7 +1000,7 @@ $code.=<<___;
aesenc $rndkey1,$inout0
aesenc $rndkey1,$inout1
paddq $increment,$iv
- dec $len
+ dec $len # $len-- ($len is in blocks)
aesenclast $rndkey0,$inout0
aesenclast $rndkey0,$inout1
@@ -965,16 +1009,26 @@ $code.=<<___;
movdqa $iv,$inout0
movups $in0,($out) # save output
pshufb $bswap_mask,$inout0
- lea 16($out),$out
- jnz .Lccm64_enc_outer
+ lea 16($out),$out # $out+=16
+ jnz .Lccm64_enc_outer # loop if ($len!=0)
- movups $inout1,($cmac)
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
+ pxor $inout0,$inout0
+ movups $inout1,($cmac) # store resulting mac
+ pxor $inout1,$inout1
+ pxor $in0,$in0
+ pxor $iv,$iv
___
$code.=<<___ if ($win64);
movaps (%rsp),%xmm6
+ movaps %xmm0,(%rsp) # clear stack
movaps 0x10(%rsp),%xmm7
+ movaps %xmm0,0x10(%rsp)
movaps 0x20(%rsp),%xmm8
+ movaps %xmm0,0x20(%rsp)
movaps 0x30(%rsp),%xmm9
+ movaps %xmm0,0x30(%rsp)
lea 0x58(%rsp),%rsp
.Lccm64_enc_ret:
___
@@ -991,10 +1045,10 @@ aesni_ccm64_decrypt_blocks:
___
$code.=<<___ if ($win64);
lea -0x58(%rsp),%rsp
- movaps %xmm6,(%rsp)
- movaps %xmm7,0x10(%rsp)
- movaps %xmm8,0x20(%rsp)
- movaps %xmm9,0x30(%rsp)
+ movaps %xmm6,(%rsp) # $iv
+ movaps %xmm7,0x10(%rsp) # $bswap_mask
+ movaps %xmm8,0x20(%rsp) # $in8
+ movaps %xmm9,0x30(%rsp) # $increment
.Lccm64_dec_body:
___
$code.=<<___;
@@ -1015,7 +1069,7 @@ $code.=<<___;
mov \$16,$rounds
movups ($inp),$in0 # load inp
paddq $increment,$iv
- lea 16($inp),$inp
+ lea 16($inp),$inp # $inp+=16
sub %r10,%rax # twisted $rounds
lea 32($key_,$rnds_),$key # end of key schedule
mov %rax,%r10
@@ -1025,11 +1079,11 @@ $code.=<<___;
xorps $inout0,$in0 # inp ^= E(iv)
movdqa $iv,$inout0
movups $in0,($out) # save output
- lea 16($out),$out
+ lea 16($out),$out # $out+=16
pshufb $bswap_mask,$inout0
- sub \$1,$len
- jz .Lccm64_dec_break
+ sub \$1,$len # $len-- ($len is in blocks)
+ jz .Lccm64_dec_break # if ($len==0) break
$movkey ($key_),$rndkey0
mov %r10,%rax
@@ -1049,13 +1103,13 @@ $code.=<<___;
aesenc $rndkey0,$inout1
$movkey -16($key,%rax),$rndkey0
jnz .Lccm64_dec2_loop
- movups ($inp),$in0 # load inp
+ movups ($inp),$in0 # load input
paddq $increment,$iv
aesenc $rndkey1,$inout0
aesenc $rndkey1,$inout1
aesenclast $rndkey0,$inout0
aesenclast $rndkey0,$inout1
- lea 16($inp),$inp
+ lea 16($inp),$inp # $inp+=16
jmp .Lccm64_dec_outer
.align 16
@@ -1065,13 +1119,23 @@ $code.=<<___;
___
&aesni_generate1("enc",$key_,$rounds,$inout1,$in0);
$code.=<<___;
- movups $inout1,($cmac)
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
+ pxor $inout0,$inout0
+ movups $inout1,($cmac) # store resulting mac
+ pxor $inout1,$inout1
+ pxor $in0,$in0
+ pxor $iv,$iv
___
$code.=<<___ if ($win64);
movaps (%rsp),%xmm6
+ movaps %xmm0,(%rsp) # clear stack
movaps 0x10(%rsp),%xmm7
+ movaps %xmm0,0x10(%rsp)
movaps 0x20(%rsp),%xmm8
+ movaps %xmm0,0x20(%rsp)
movaps 0x30(%rsp),%xmm9
+ movaps %xmm0,0x30(%rsp)
lea 0x58(%rsp),%rsp
.Lccm64_dec_ret:
___
@@ -1102,13 +1166,34 @@ $code.=<<___;
.type aesni_ctr32_encrypt_blocks,\@function,5
.align 16
aesni_ctr32_encrypt_blocks:
+ cmp \$1,$len
+ jne .Lctr32_bulk
+
+ # handle single block without allocating stack frame,
+ # useful when handling edges
+ movups ($ivp),$inout0
+ movups ($inp),$inout1
+ mov 240($key),%edx # key->rounds
+___
+ &aesni_generate1("enc",$key,"%edx");
+$code.=<<___;
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
+ xorps $inout1,$inout0
+ pxor $inout1,$inout1
+ movups $inout0,($out)
+ xorps $inout0,$inout0
+ jmp .Lctr32_epilogue
+
+.align 16
+.Lctr32_bulk:
lea (%rsp),%rax
push %rbp
sub \$$frame_size,%rsp
and \$-16,%rsp # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
- movaps %xmm6,-0xa8(%rax)
+ movaps %xmm6,-0xa8(%rax) # offload everything
movaps %xmm7,-0x98(%rax)
movaps %xmm8,-0x88(%rax)
movaps %xmm9,-0x78(%rax)
@@ -1123,8 +1208,8 @@ ___
$code.=<<___;
lea -8(%rax),%rbp
- cmp \$1,$len
- je .Lctr32_one_shortcut
+ # 8 16-byte words on top of stack are counter values
+ # xor-ed with zero-round key
movdqu ($ivp),$inout0
movdqu ($key),$rndkey0
@@ -1139,7 +1224,7 @@ $code.=<<___;
movdqa $inout0,0x40(%rsp)
movdqa $inout0,0x50(%rsp)
movdqa $inout0,0x60(%rsp)
- mov %rdx,%r10 # borrow %rdx
+ mov %rdx,%r10 # about to borrow %rdx
movdqa $inout0,0x70(%rsp)
lea 1($ctr),%rax
@@ -1183,15 +1268,15 @@ $code.=<<___;
movdqa 0x40(%rsp),$inout4
movdqa 0x50(%rsp),$inout5
- cmp \$8,$len
- jb .Lctr32_tail
+ cmp \$8,$len # $len is in blocks
+ jb .Lctr32_tail # short input if ($len<8)
- sub \$6,$len
+ sub \$6,$len # $len is biased by -6
cmp \$`1<<22`,%r10d # check for MOVBE without XSAVE
- je .Lctr32_6x
+ je .Lctr32_6x # [which denotes Atom Silvermont]
lea 0x80($key),$key # size optimization
- sub \$2,$len
+ sub \$2,$len # $len is biased by -8
jmp .Lctr32_loop8
.align 16
@@ -1205,13 +1290,13 @@ $code.=<<___;
.align 16
.Lctr32_loop6:
- add \$6,$ctr
+ add \$6,$ctr # next counter value
$movkey -48($key,$rnds_),$rndkey0
aesenc $rndkey1,$inout0
mov $ctr,%eax
xor $key0,%eax
aesenc $rndkey1,$inout1
- movbe %eax,`0x00+12`(%rsp)
+ movbe %eax,`0x00+12`(%rsp) # store next counter value
lea 1($ctr),%eax
aesenc $rndkey1,$inout2
xor $key0,%eax
@@ -1244,16 +1329,16 @@ $code.=<<___;
call .Lenc_loop6
- movdqu ($inp),$inout6
+ movdqu ($inp),$inout6 # load 6 input blocks
movdqu 0x10($inp),$inout7
movdqu 0x20($inp),$in0
movdqu 0x30($inp),$in1
movdqu 0x40($inp),$in2
movdqu 0x50($inp),$in3
- lea 0x60($inp),$inp
+ lea 0x60($inp),$inp # $inp+=6*16
$movkey -64($key,$rnds_),$rndkey1
- pxor $inout0,$inout6
- movaps 0x00(%rsp),$inout0
+ pxor $inout0,$inout6 # inp^=E(ctr)
+ movaps 0x00(%rsp),$inout0 # load next counter [xor-ed with 0 round]
pxor $inout1,$inout7
movaps 0x10(%rsp),$inout1
pxor $inout2,$in0
@@ -1264,19 +1349,19 @@ $code.=<<___;
movaps 0x40(%rsp),$inout4
pxor $inout5,$in3
movaps 0x50(%rsp),$inout5
- movdqu $inout6,($out)
+ movdqu $inout6,($out) # store 6 output blocks
movdqu $inout7,0x10($out)
movdqu $in0,0x20($out)
movdqu $in1,0x30($out)
movdqu $in2,0x40($out)
movdqu $in3,0x50($out)
- lea 0x60($out),$out
-
+ lea 0x60($out),$out # $out+=6*16
+
sub \$6,$len
- jnc .Lctr32_loop6
+ jnc .Lctr32_loop6 # loop if $len-=6 didn't borrow
- add \$6,$len
- jz .Lctr32_done
+ add \$6,$len # restore real remaining $len
+ jz .Lctr32_done # done if ($len==0)
lea -48($rnds_),$rounds
lea -80($key,$rnds_),$key # restore $key
@@ -1286,7 +1371,7 @@ $code.=<<___;
.align 32
.Lctr32_loop8:
- add \$8,$ctr
+ add \$8,$ctr # next counter value
movdqa 0x60(%rsp),$inout6
aesenc $rndkey1,$inout0
mov $ctr,%r9d
@@ -1298,7 +1383,7 @@ $code.=<<___;
xor $key0,%r9d
nop
aesenc $rndkey1,$inout3
- mov %r9d,0x00+12(%rsp)
+ mov %r9d,0x00+12(%rsp) # store next counter value
lea 1($ctr),%r9
aesenc $rndkey1,$inout4
aesenc $rndkey1,$inout5
@@ -1331,7 +1416,7 @@ $code.=<<___;
aesenc $rndkey0,$inout1
aesenc $rndkey0,$inout2
xor $key0,%r9d
- movdqu 0x00($inp),$in0
+ movdqu 0x00($inp),$in0 # start loading input
aesenc $rndkey0,$inout3
mov %r9d,0x70+12(%rsp)
cmp \$11,$rounds
@@ -1388,7 +1473,7 @@ $code.=<<___;
.align 16
.Lctr32_enc_done:
movdqu 0x10($inp),$in1
- pxor $rndkey0,$in0
+ pxor $rndkey0,$in0 # input^=round[last]
movdqu 0x20($inp),$in2
pxor $rndkey0,$in1
movdqu 0x30($inp),$in3
@@ -1406,11 +1491,11 @@ $code.=<<___;
aesenc $rndkey1,$inout5
aesenc $rndkey1,$inout6
aesenc $rndkey1,$inout7
- movdqu 0x60($inp),$rndkey1
- lea 0x80($inp),$inp
+ movdqu 0x60($inp),$rndkey1 # borrow $rndkey1 for inp[6]
+ lea 0x80($inp),$inp # $inp+=8*16
- aesenclast $in0,$inout0
- pxor $rndkey0,$rndkey1
+ aesenclast $in0,$inout0 # $inN is inp[N]^round[last]
+ pxor $rndkey0,$rndkey1 # borrowed $rndkey
movdqu 0x70-0x80($inp),$in0
aesenclast $in1,$inout1
pxor $rndkey0,$in0
@@ -1425,10 +1510,10 @@ $code.=<<___;
movdqa 0x40(%rsp),$in5
aesenclast $rndkey1,$inout6
movdqa 0x50(%rsp),$rndkey0
- $movkey 0x10-0x80($key),$rndkey1
+ $movkey 0x10-0x80($key),$rndkey1#real 1st-round key
aesenclast $in0,$inout7
- movups $inout0,($out) # store output
+ movups $inout0,($out) # store 8 output blocks
movdqa $in1,$inout0
movups $inout1,0x10($out)
movdqa $in2,$inout1
@@ -1442,21 +1527,24 @@ $code.=<<___;
movdqa $rndkey0,$inout5
movups $inout6,0x60($out)
movups $inout7,0x70($out)
- lea 0x80($out),$out
-
+ lea 0x80($out),$out # $out+=8*16
+
sub \$8,$len
- jnc .Lctr32_loop8
+ jnc .Lctr32_loop8 # loop if $len-=8 didn't borrow
- add \$8,$len
- jz .Lctr32_done
+ add \$8,$len # restore real remainig $len
+ jz .Lctr32_done # done if ($len==0)
lea -0x80($key),$key
.Lctr32_tail:
+ # note that at this point $inout0..5 are populated with
+ # counter values xor-ed with 0-round key
lea 16($key),$key
cmp \$4,$len
jb .Lctr32_loop3
je .Lctr32_loop4
+ # if ($len>4) compute 7 E(counter)
shl \$4,$rounds
movdqa 0x60(%rsp),$inout6
pxor $inout7,$inout7
@@ -1464,14 +1552,14 @@ $code.=<<___;
$movkey 16($key),$rndkey0
aesenc $rndkey1,$inout0
aesenc $rndkey1,$inout1
- lea 32-16($key,$rounds),$key
+ lea 32-16($key,$rounds),$key# prepare for .Lenc_loop8_enter
neg %rax
aesenc $rndkey1,$inout2
- add \$16,%rax
+ add \$16,%rax # prepare for .Lenc_loop8_enter
movups ($inp),$in0
aesenc $rndkey1,$inout3
aesenc $rndkey1,$inout4
- movups 0x10($inp),$in1
+ movups 0x10($inp),$in1 # pre-load input
movups 0x20($inp),$in2
aesenc $rndkey1,$inout5
aesenc $rndkey1,$inout6
@@ -1482,7 +1570,7 @@ $code.=<<___;
pxor $in0,$inout0
movdqu 0x40($inp),$in0
pxor $in1,$inout1
- movdqu $inout0,($out)
+ movdqu $inout0,($out) # store output
pxor $in2,$inout2
movdqu $inout1,0x10($out)
pxor $in3,$inout3
@@ -1491,17 +1579,17 @@ $code.=<<___;
movdqu $inout3,0x30($out)
movdqu $inout4,0x40($out)
cmp \$6,$len
- jb .Lctr32_done
+ jb .Lctr32_done # $len was 5, stop store
movups 0x50($inp),$in1
xorps $in1,$inout5
movups $inout5,0x50($out)
- je .Lctr32_done
+ je .Lctr32_done # $len was 6, stop store
movups 0x60($inp),$in2
xorps $in2,$inout6
movups $inout6,0x60($out)
- jmp .Lctr32_done
+ jmp .Lctr32_done # $len was 7, stop store
.align 32
.Lctr32_loop4:
@@ -1515,7 +1603,7 @@ $code.=<<___;
jnz .Lctr32_loop4
aesenclast $rndkey1,$inout0
aesenclast $rndkey1,$inout1
- movups ($inp),$in0
+ movups ($inp),$in0 # load input
movups 0x10($inp),$in1
aesenclast $rndkey1,$inout2
aesenclast $rndkey1,$inout3
@@ -1523,14 +1611,14 @@ $code.=<<___;
movups 0x30($inp),$in3
xorps $in0,$inout0
- movups $inout0,($out)
+ movups $inout0,($out) # store output
xorps $in1,$inout1
movups $inout1,0x10($out)
pxor $in2,$inout2
movdqu $inout2,0x20($out)
pxor $in3,$inout3
movdqu $inout3,0x30($out)
- jmp .Lctr32_done
+ jmp .Lctr32_done # $len was 4, stop store
.align 32
.Lctr32_loop3:
@@ -1545,48 +1633,79 @@ $code.=<<___;
aesenclast $rndkey1,$inout1
aesenclast $rndkey1,$inout2
- movups ($inp),$in0
+ movups ($inp),$in0 # load input
xorps $in0,$inout0
- movups $inout0,($out)
+ movups $inout0,($out) # store output
cmp \$2,$len
- jb .Lctr32_done
+ jb .Lctr32_done # $len was 1, stop store
movups 0x10($inp),$in1
xorps $in1,$inout1
movups $inout1,0x10($out)
- je .Lctr32_done
+ je .Lctr32_done # $len was 2, stop store
movups 0x20($inp),$in2
xorps $in2,$inout2
- movups $inout2,0x20($out)
- jmp .Lctr32_done
-
-.align 16
-.Lctr32_one_shortcut:
- movups ($ivp),$inout0
- movups ($inp),$in0
- mov 240($key),$rounds # key->rounds
-___
- &aesni_generate1("enc",$key,$rounds);
-$code.=<<___;
- xorps $in0,$inout0
- movups $inout0,($out)
- jmp .Lctr32_done
+ movups $inout2,0x20($out) # $len was 3, stop store
-.align 16
.Lctr32_done:
+ xorps %xmm0,%xmm0 # clear regiser bank
+ xor $key0,$key0
+ pxor %xmm1,%xmm1
+ pxor %xmm2,%xmm2
+ pxor %xmm3,%xmm3
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+$code.=<<___ if (!$win64);
+ pxor %xmm6,%xmm6
+ pxor %xmm7,%xmm7
+ movaps %xmm0,0x00(%rsp) # clear stack
+ pxor %xmm8,%xmm8
+ movaps %xmm0,0x10(%rsp)
+ pxor %xmm9,%xmm9
+ movaps %xmm0,0x20(%rsp)
+ pxor %xmm10,%xmm10
+ movaps %xmm0,0x30(%rsp)
+ pxor %xmm11,%xmm11
+ movaps %xmm0,0x40(%rsp)
+ pxor %xmm12,%xmm12
+ movaps %xmm0,0x50(%rsp)
+ pxor %xmm13,%xmm13
+ movaps %xmm0,0x60(%rsp)
+ pxor %xmm14,%xmm14
+ movaps %xmm0,0x70(%rsp)
+ pxor %xmm15,%xmm15
___
$code.=<<___ if ($win64);
movaps -0xa0(%rbp),%xmm6
+ movaps %xmm0,-0xa0(%rbp) # clear stack
movaps -0x90(%rbp),%xmm7
+ movaps %xmm0,-0x90(%rbp)
movaps -0x80(%rbp),%xmm8
+ movaps %xmm0,-0x80(%rbp)
movaps -0x70(%rbp),%xmm9
+ movaps %xmm0,-0x70(%rbp)
movaps -0x60(%rbp),%xmm10
+ movaps %xmm0,-0x60(%rbp)
movaps -0x50(%rbp),%xmm11
+ movaps %xmm0,-0x50(%rbp)
movaps -0x40(%rbp),%xmm12
+ movaps %xmm0,-0x40(%rbp)
movaps -0x30(%rbp),%xmm13
+ movaps %xmm0,-0x30(%rbp)
movaps -0x20(%rbp),%xmm14
+ movaps %xmm0,-0x20(%rbp)
movaps -0x10(%rbp),%xmm15
+ movaps %xmm0,-0x10(%rbp)
+ movaps %xmm0,0x00(%rsp)
+ movaps %xmm0,0x10(%rsp)
+ movaps %xmm0,0x20(%rsp)
+ movaps %xmm0,0x30(%rsp)
+ movaps %xmm0,0x40(%rsp)
+ movaps %xmm0,0x50(%rsp)
+ movaps %xmm0,0x60(%rsp)
+ movaps %xmm0,0x70(%rsp)
___
$code.=<<___;
lea (%rbp),%rsp
@@ -1619,7 +1738,7 @@ aesni_xts_encrypt:
and \$-16,%rsp # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
- movaps %xmm6,-0xa8(%rax)
+ movaps %xmm6,-0xa8(%rax) # offload everything
movaps %xmm7,-0x98(%rax)
movaps %xmm8,-0x88(%rax)
movaps %xmm9,-0x78(%rax)
@@ -1679,7 +1798,7 @@ $code.=<<___;
movaps $rndkey1,0x60(%rsp) # save round[0]^round[last]
sub \$16*6,$len
- jc .Lxts_enc_short
+ jc .Lxts_enc_short # if $len-=6*16 borrowed
mov \$16+96,$rounds
lea 32($key_,$rnds_),$key # end of key schedule
@@ -1694,7 +1813,7 @@ $code.=<<___;
movdqu `16*0`($inp),$inout0 # load input
movdqa $rndkey0,$twmask
movdqu `16*1`($inp),$inout1
- pxor @tweak[0],$inout0
+ pxor @tweak[0],$inout0 # input^=tweak^round[0]
movdqu `16*2`($inp),$inout2
pxor @tweak[1],$inout1
aesenc $rndkey1,$inout0
@@ -1713,10 +1832,10 @@ $code.=<<___;
lea `16*6`($inp),$inp
pxor $twmask,$inout5
- pxor $twres,@tweak[0]
+ pxor $twres,@tweak[0] # calclulate tweaks^round[last]
aesenc $rndkey1,$inout4
pxor $twres,@tweak[1]
- movdqa @tweak[0],`16*0`(%rsp) # put aside tweaks^last round key
+ movdqa @tweak[0],`16*0`(%rsp) # put aside tweaks^round[last]
aesenc $rndkey1,$inout5
$movkey 48($key_),$rndkey1
pxor $twres,@tweak[2]
@@ -1757,7 +1876,7 @@ $code.=<<___;
$movkey -80($key,%rax),$rndkey0
jnz .Lxts_enc_loop6
- movdqa (%r8),$twmask
+ movdqa (%r8),$twmask # start calculating next tweak
movdqa $twres,$twtmp
paddd $twres,$twres
aesenc $rndkey1,$inout0
@@ -1851,15 +1970,15 @@ $code.=<<___;
aesenclast `16*5`(%rsp),$inout5
pxor $twres,@tweak[5]
- lea `16*6`($out),$out
- movups $inout0,`-16*6`($out) # write output
+ lea `16*6`($out),$out # $out+=6*16
+ movups $inout0,`-16*6`($out) # store 6 output blocks
movups $inout1,`-16*5`($out)
movups $inout2,`-16*4`($out)
movups $inout3,`-16*3`($out)
movups $inout4,`-16*2`($out)
movups $inout5,`-16*1`($out)
sub \$16*6,$len
- jnc .Lxts_enc_grandloop
+ jnc .Lxts_enc_grandloop # loop if $len-=6*16 didn't borrow
mov \$16+96,$rounds
sub $rnds_,$rounds
@@ -1867,34 +1986,36 @@ $code.=<<___;
shr \$4,$rounds # restore original value
.Lxts_enc_short:
+ # at the point @tweak[0..5] are populated with tweak values
mov $rounds,$rnds_ # backup $rounds
pxor $rndkey0,@tweak[0]
- add \$16*6,$len
- jz .Lxts_enc_done
+ add \$16*6,$len # restore real remaining $len
+ jz .Lxts_enc_done # done if ($len==0)
pxor $rndkey0,@tweak[1]
cmp \$0x20,$len
- jb .Lxts_enc_one
+ jb .Lxts_enc_one # $len is 1*16
pxor $rndkey0,@tweak[2]
- je .Lxts_enc_two
+ je .Lxts_enc_two # $len is 2*16
pxor $rndkey0,@tweak[3]
cmp \$0x40,$len
- jb .Lxts_enc_three
+ jb .Lxts_enc_three # $len is 3*16
pxor $rndkey0,@tweak[4]
- je .Lxts_enc_four
+ je .Lxts_enc_four # $len is 4*16
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # $len is 5*16
movdqu 16*1($inp),$inout1
movdqu 16*2($inp),$inout2
pxor @tweak[0],$inout0
movdqu 16*3($inp),$inout3
pxor @tweak[1],$inout1
movdqu 16*4($inp),$inout4
- lea 16*5($inp),$inp
+ lea 16*5($inp),$inp # $inp+=5*16
pxor @tweak[2],$inout2
pxor @tweak[3],$inout3
pxor @tweak[4],$inout4
+ pxor $inout5,$inout5
call _aesni_encrypt6
@@ -1902,35 +2023,35 @@ $code.=<<___;
movdqa @tweak[5],@tweak[0]
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
- movdqu $inout0,($out)
+ movdqu $inout0,($out) # store 5 output blocks
xorps @tweak[3],$inout3
movdqu $inout1,16*1($out)
xorps @tweak[4],$inout4
movdqu $inout2,16*2($out)
movdqu $inout3,16*3($out)
movdqu $inout4,16*4($out)
- lea 16*5($out),$out
+ lea 16*5($out),$out # $out+=5*16
jmp .Lxts_enc_done
.align 16
.Lxts_enc_one:
movups ($inp),$inout0
- lea 16*1($inp),$inp
+ lea 16*1($inp),$inp # inp+=1*16
xorps @tweak[0],$inout0
___
&aesni_generate1("enc",$key,$rounds);
$code.=<<___;
xorps @tweak[0],$inout0
movdqa @tweak[1],@tweak[0]
- movups $inout0,($out)
- lea 16*1($out),$out
+ movups $inout0,($out) # store one output block
+ lea 16*1($out),$out # $out+=1*16
jmp .Lxts_enc_done
.align 16
.Lxts_enc_two:
movups ($inp),$inout0
movups 16($inp),$inout1
- lea 32($inp),$inp
+ lea 32($inp),$inp # $inp+=2*16
xorps @tweak[0],$inout0
xorps @tweak[1],$inout1
@@ -1939,9 +2060,9 @@ $code.=<<___;
xorps @tweak[0],$inout0
movdqa @tweak[2],@tweak[0]
xorps @tweak[1],$inout1
- movups $inout0,($out)
+ movups $inout0,($out) # store 2 output blocks
movups $inout1,16*1($out)
- lea 16*2($out),$out
+ lea 16*2($out),$out # $out+=2*16
jmp .Lxts_enc_done
.align 16
@@ -1949,7 +2070,7 @@ $code.=<<___;
movups ($inp),$inout0
movups 16*1($inp),$inout1
movups 16*2($inp),$inout2
- lea 16*3($inp),$inp
+ lea 16*3($inp),$inp # $inp+=3*16
xorps @tweak[0],$inout0
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
@@ -1960,10 +2081,10 @@ $code.=<<___;
movdqa @tweak[3],@tweak[0]
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
- movups $inout0,($out)
+ movups $inout0,($out) # store 3 output blocks
movups $inout1,16*1($out)
movups $inout2,16*2($out)
- lea 16*3($out),$out
+ lea 16*3($out),$out # $out+=3*16
jmp .Lxts_enc_done
.align 16
@@ -1973,7 +2094,7 @@ $code.=<<___;
movups 16*2($inp),$inout2
xorps @tweak[0],$inout0
movups 16*3($inp),$inout3
- lea 16*4($inp),$inp
+ lea 16*4($inp),$inp # $inp+=4*16
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
xorps @tweak[3],$inout3
@@ -1984,17 +2105,17 @@ $code.=<<___;
movdqa @tweak[4],@tweak[0]
pxor @tweak[1],$inout1
pxor @tweak[2],$inout2
- movdqu $inout0,($out)
+ movdqu $inout0,($out) # store 4 output blocks
pxor @tweak[3],$inout3
movdqu $inout1,16*1($out)
movdqu $inout2,16*2($out)
movdqu $inout3,16*3($out)
- lea 16*4($out),$out
+ lea 16*4($out),$out # $out+=4*16
jmp .Lxts_enc_done
.align 16
.Lxts_enc_done:
- and \$15,$len_
+ and \$15,$len_ # see if $len%16 is 0
jz .Lxts_enc_ret
mov $len_,$len
@@ -2021,18 +2142,60 @@ $code.=<<___;
movups $inout0,-16($out)
.Lxts_enc_ret:
+ xorps %xmm0,%xmm0 # clear register bank
+ pxor %xmm1,%xmm1
+ pxor %xmm2,%xmm2
+ pxor %xmm3,%xmm3
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+$code.=<<___ if (!$win64);
+ pxor %xmm6,%xmm6
+ pxor %xmm7,%xmm7
+ movaps %xmm0,0x00(%rsp) # clear stack
+ pxor %xmm8,%xmm8
+ movaps %xmm0,0x10(%rsp)
+ pxor %xmm9,%xmm9
+ movaps %xmm0,0x20(%rsp)
+ pxor %xmm10,%xmm10
+ movaps %xmm0,0x30(%rsp)
+ pxor %xmm11,%xmm11
+ movaps %xmm0,0x40(%rsp)
+ pxor %xmm12,%xmm12
+ movaps %xmm0,0x50(%rsp)
+ pxor %xmm13,%xmm13
+ movaps %xmm0,0x60(%rsp)
+ pxor %xmm14,%xmm14
+ pxor %xmm15,%xmm15
___
$code.=<<___ if ($win64);
movaps -0xa0(%rbp),%xmm6
+ movaps %xmm0,-0xa0(%rbp) # clear stack
movaps -0x90(%rbp),%xmm7
+ movaps %xmm0,-0x90(%rbp)
movaps -0x80(%rbp),%xmm8
+ movaps %xmm0,-0x80(%rbp)
movaps -0x70(%rbp),%xmm9
+ movaps %xmm0,-0x70(%rbp)
movaps -0x60(%rbp),%xmm10
+ movaps %xmm0,-0x60(%rbp)
movaps -0x50(%rbp),%xmm11
+ movaps %xmm0,-0x50(%rbp)
movaps -0x40(%rbp),%xmm12
+ movaps %xmm0,-0x40(%rbp)
movaps -0x30(%rbp),%xmm13
+ movaps %xmm0,-0x30(%rbp)
movaps -0x20(%rbp),%xmm14
+ movaps %xmm0,-0x20(%rbp)
movaps -0x10(%rbp),%xmm15
+ movaps %xmm0,-0x10(%rbp)
+ movaps %xmm0,0x00(%rsp)
+ movaps %xmm0,0x10(%rsp)
+ movaps %xmm0,0x20(%rsp)
+ movaps %xmm0,0x30(%rsp)
+ movaps %xmm0,0x40(%rsp)
+ movaps %xmm0,0x50(%rsp)
+ movaps %xmm0,0x60(%rsp)
___
$code.=<<___;
lea (%rbp),%rsp
@@ -2053,7 +2216,7 @@ aesni_xts_decrypt:
and \$-16,%rsp # Linux kernel stack can be incorrectly seeded
___
$code.=<<___ if ($win64);
- movaps %xmm6,-0xa8(%rax)
+ movaps %xmm6,-0xa8(%rax) # offload everything
movaps %xmm7,-0x98(%rax)
movaps %xmm8,-0x88(%rax)
movaps %xmm9,-0x78(%rax)
@@ -2116,7 +2279,7 @@ $code.=<<___;
movaps $rndkey1,0x60(%rsp) # save round[0]^round[last]
sub \$16*6,$len
- jc .Lxts_dec_short
+ jc .Lxts_dec_short # if $len-=6*16 borrowed
mov \$16+96,$rounds
lea 32($key_,$rnds_),$key # end of key schedule
@@ -2131,7 +2294,7 @@ $code.=<<___;
movdqu `16*0`($inp),$inout0 # load input
movdqa $rndkey0,$twmask
movdqu `16*1`($inp),$inout1
- pxor @tweak[0],$inout0
+ pxor @tweak[0],$inout0 # intput^=tweak^round[0]
movdqu `16*2`($inp),$inout2
pxor @tweak[1],$inout1
aesdec $rndkey1,$inout0
@@ -2150,7 +2313,7 @@ $code.=<<___;
lea `16*6`($inp),$inp
pxor $twmask,$inout5
- pxor $twres,@tweak[0]
+ pxor $twres,@tweak[0] # calclulate tweaks^round[last]
aesdec $rndkey1,$inout4
pxor $twres,@tweak[1]
movdqa @tweak[0],`16*0`(%rsp) # put aside tweaks^last round key
@@ -2194,7 +2357,7 @@ $code.=<<___;
$movkey -80($key,%rax),$rndkey0
jnz .Lxts_dec_loop6
- movdqa (%r8),$twmask
+ movdqa (%r8),$twmask # start calculating next tweak
movdqa $twres,$twtmp
paddd $twres,$twres
aesdec $rndkey1,$inout0
@@ -2288,15 +2451,15 @@ $code.=<<___;
aesdeclast `16*5`(%rsp),$inout5
pxor $twres,@tweak[5]
- lea `16*6`($out),$out
- movups $inout0,`-16*6`($out) # write output
+ lea `16*6`($out),$out # $out+=6*16
+ movups $inout0,`-16*6`($out) # store 6 output blocks
movups $inout1,`-16*5`($out)
movups $inout2,`-16*4`($out)
movups $inout3,`-16*3`($out)
movups $inout4,`-16*2`($out)
movups $inout5,`-16*1`($out)
sub \$16*6,$len
- jnc .Lxts_dec_grandloop
+ jnc .Lxts_dec_grandloop # loop if $len-=6*16 didn't borrow
mov \$16+96,$rounds
sub $rnds_,$rounds
@@ -2304,31 +2467,32 @@ $code.=<<___;
shr \$4,$rounds # restore original value
.Lxts_dec_short:
+ # at the point @tweak[0..5] are populated with tweak values
mov $rounds,$rnds_ # backup $rounds
pxor $rndkey0,@tweak[0]
pxor $rndkey0,@tweak[1]
- add \$16*6,$len
- jz .Lxts_dec_done
+ add \$16*6,$len # restore real remaining $len
+ jz .Lxts_dec_done # done if ($len==0)
pxor $rndkey0,@tweak[2]
cmp \$0x20,$len
- jb .Lxts_dec_one
+ jb .Lxts_dec_one # $len is 1*16
pxor $rndkey0,@tweak[3]
- je .Lxts_dec_two
+ je .Lxts_dec_two # $len is 2*16
pxor $rndkey0,@tweak[4]
cmp \$0x40,$len
- jb .Lxts_dec_three
- je .Lxts_dec_four
+ jb .Lxts_dec_three # $len is 3*16
+ je .Lxts_dec_four # $len is 4*16
- movdqu ($inp),$inout0
+ movdqu ($inp),$inout0 # $len is 5*16
movdqu 16*1($inp),$inout1
movdqu 16*2($inp),$inout2
pxor @tweak[0],$inout0
movdqu 16*3($inp),$inout3
pxor @tweak[1],$inout1
movdqu 16*4($inp),$inout4
- lea 16*5($inp),$inp
+ lea 16*5($inp),$inp # $inp+=5*16
pxor @tweak[2],$inout2
pxor @tweak[3],$inout3
pxor @tweak[4],$inout4
@@ -2338,7 +2502,7 @@ $code.=<<___;
xorps @tweak[0],$inout0
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
- movdqu $inout0,($out)
+ movdqu $inout0,($out) # store 5 output blocks
xorps @tweak[3],$inout3
movdqu $inout1,16*1($out)
xorps @tweak[4],$inout4
@@ -2347,7 +2511,7 @@ $code.=<<___;
movdqu $inout3,16*3($out)
pcmpgtd @tweak[5],$twtmp
movdqu $inout4,16*4($out)
- lea 16*5($out),$out
+ lea 16*5($out),$out # $out+=5*16
pshufd \$0x13,$twtmp,@tweak[1] # $twres
and \$15,$len_
jz .Lxts_dec_ret
@@ -2361,23 +2525,23 @@ $code.=<<___;
.align 16
.Lxts_dec_one:
movups ($inp),$inout0
- lea 16*1($inp),$inp
+ lea 16*1($inp),$inp # $inp+=1*16
xorps @tweak[0],$inout0
___
&aesni_generate1("dec",$key,$rounds);
$code.=<<___;
xorps @tweak[0],$inout0
movdqa @tweak[1],@tweak[0]
- movups $inout0,($out)
+ movups $inout0,($out) # store one output block
movdqa @tweak[2],@tweak[1]
- lea 16*1($out),$out
+ lea 16*1($out),$out # $out+=1*16
jmp .Lxts_dec_done
.align 16
.Lxts_dec_two:
movups ($inp),$inout0
movups 16($inp),$inout1
- lea 32($inp),$inp
+ lea 32($inp),$inp # $inp+=2*16
xorps @tweak[0],$inout0
xorps @tweak[1],$inout1
@@ -2387,9 +2551,9 @@ $code.=<<___;
movdqa @tweak[2],@tweak[0]
xorps @tweak[1],$inout1
movdqa @tweak[3],@tweak[1]
- movups $inout0,($out)
+ movups $inout0,($out) # store 2 output blocks
movups $inout1,16*1($out)
- lea 16*2($out),$out
+ lea 16*2($out),$out # $out+=2*16
jmp .Lxts_dec_done
.align 16
@@ -2397,7 +2561,7 @@ $code.=<<___;
movups ($inp),$inout0
movups 16*1($inp),$inout1
movups 16*2($inp),$inout2
- lea 16*3($inp),$inp
+ lea 16*3($inp),$inp # $inp+=3*16
xorps @tweak[0],$inout0
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
@@ -2409,10 +2573,10 @@ $code.=<<___;
xorps @tweak[1],$inout1
movdqa @tweak[4],@tweak[1]
xorps @tweak[2],$inout2
- movups $inout0,($out)
+ movups $inout0,($out) # store 3 output blocks
movups $inout1,16*1($out)
movups $inout2,16*2($out)
- lea 16*3($out),$out
+ lea 16*3($out),$out # $out+=3*16
jmp .Lxts_dec_done
.align 16
@@ -2422,7 +2586,7 @@ $code.=<<___;
movups 16*2($inp),$inout2
xorps @tweak[0],$inout0
movups 16*3($inp),$inout3
- lea 16*4($inp),$inp
+ lea 16*4($inp),$inp # $inp+=4*16
xorps @tweak[1],$inout1
xorps @tweak[2],$inout2
xorps @tweak[3],$inout3
@@ -2434,17 +2598,17 @@ $code.=<<___;
pxor @tweak[1],$inout1
movdqa @tweak[5],@tweak[1]
pxor @tweak[2],$inout2
- movdqu $inout0,($out)
+ movdqu $inout0,($out) # store 4 output blocks
pxor @tweak[3],$inout3
movdqu $inout1,16*1($out)
movdqu $inout2,16*2($out)
movdqu $inout3,16*3($out)
- lea 16*4($out),$out
+ lea 16*4($out),$out # $out+=4*16
jmp .Lxts_dec_done
.align 16
.Lxts_dec_done:
- and \$15,$len_
+ and \$15,$len_ # see if $len%16 is 0
jz .Lxts_dec_ret
.Lxts_dec_done2:
mov $len_,$len
@@ -2482,18 +2646,60 @@ $code.=<<___;
movups $inout0,($out)
.Lxts_dec_ret:
+ xorps %xmm0,%xmm0 # clear register bank
+ pxor %xmm1,%xmm1
+ pxor %xmm2,%xmm2
+ pxor %xmm3,%xmm3
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
+___
+$code.=<<___ if (!$win64);
+ pxor %xmm6,%xmm6
+ pxor %xmm7,%xmm7
+ movaps %xmm0,0x00(%rsp) # clear stack
+ pxor %xmm8,%xmm8
+ movaps %xmm0,0x10(%rsp)
+ pxor %xmm9,%xmm9
+ movaps %xmm0,0x20(%rsp)
+ pxor %xmm10,%xmm10
+ movaps %xmm0,0x30(%rsp)
+ pxor %xmm11,%xmm11
+ movaps %xmm0,0x40(%rsp)
+ pxor %xmm12,%xmm12
+ movaps %xmm0,0x50(%rsp)
+ pxor %xmm13,%xmm13
+ movaps %xmm0,0x60(%rsp)
+ pxor %xmm14,%xmm14
+ pxor %xmm15,%xmm15
___
$code.=<<___ if ($win64);
movaps -0xa0(%rbp),%xmm6
+ movaps %xmm0,-0xa0(%rbp) # clear stack
movaps -0x90(%rbp),%xmm7
+ movaps %xmm0,-0x90(%rbp)
movaps -0x80(%rbp),%xmm8
+ movaps %xmm0,-0x80(%rbp)
movaps -0x70(%rbp),%xmm9
+ movaps %xmm0,-0x70(%rbp)
movaps -0x60(%rbp),%xmm10
+ movaps %xmm0,-0x60(%rbp)
movaps -0x50(%rbp),%xmm11
+ movaps %xmm0,-0x50(%rbp)
movaps -0x40(%rbp),%xmm12
+ movaps %xmm0,-0x40(%rbp)
movaps -0x30(%rbp),%xmm13
+ movaps %xmm0,-0x30(%rbp)
movaps -0x20(%rbp),%xmm14
+ movaps %xmm0,-0x20(%rbp)
movaps -0x10(%rbp),%xmm15
+ movaps %xmm0,-0x10(%rbp)
+ movaps %xmm0,0x00(%rsp)
+ movaps %xmm0,0x10(%rsp)
+ movaps %xmm0,0x20(%rsp)
+ movaps %xmm0,0x30(%rsp)
+ movaps %xmm0,0x40(%rsp)
+ movaps %xmm0,0x50(%rsp)
+ movaps %xmm0,0x60(%rsp)
___
$code.=<<___;
lea (%rbp),%rsp
@@ -2548,7 +2754,11 @@ $code.=<<___;
jnc .Lcbc_enc_loop
add \$16,$len
jnz .Lcbc_enc_tail
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
movups $inout0,($ivp)
+ pxor $inout0,$inout0
+ pxor $inout1,$inout1
jmp .Lcbc_ret
.Lcbc_enc_tail:
@@ -2568,6 +2778,27 @@ $code.=<<___;
#--------------------------- CBC DECRYPT ------------------------------#
.align 16
.Lcbc_decrypt:
+ cmp \$16,$len
+ jne .Lcbc_decrypt_bulk
+
+ # handle single block without allocating stack frame,
+ # useful in ciphertext stealing mode
+ movdqu ($inp),$inout0 # load input
+ movdqu ($ivp),$inout1 # load iv
+ movdqa $inout0,$inout2 # future iv
+___
+ &aesni_generate1("dec",$key,$rnds_);
+$code.=<<___;
+ pxor $rndkey0,$rndkey0 # clear register bank
+ pxor $rndkey1,$rndkey1
+ movdqu $inout2,($ivp) # store iv
+ xorps $inout1,$inout0 # ^=iv
+ pxor $inout1,$inout1
+ movups $inout0,($out) # store output
+ pxor $inout0,$inout0
+ jmp .Lcbc_ret
+.align 16
+.Lcbc_decrypt_bulk:
lea (%rsp),%rax
push %rbp
sub \$$frame_size,%rsp
@@ -2609,11 +2840,11 @@ $code.=<<___;
cmp \$0x70,$len
jbe .Lcbc_dec_six_or_seven
- and \$`1<<26|1<<22`,%r9d # isolate XSAVE+MOVBE
- sub \$0x50,$len
+ and \$`1<<26|1<<22`,%r9d # isolate XSAVE+MOVBE
+ sub \$0x50,$len # $len is biased by -5*16
cmp \$`1<<22`,%r9d # check for MOVBE without XSAVE
- je .Lcbc_dec_loop6_enter
- sub \$0x20,$len
+ je .Lcbc_dec_loop6_enter # [which denotes Atom Silvermont]
+ sub \$0x20,$len # $len is biased by -7*16
lea 0x70($key),$key # size optimization
jmp .Lcbc_dec_loop8_enter
.align 16
@@ -2740,7 +2971,7 @@ $code.=<<___;
movaps $inout7,$inout0
lea -0x70($key),$key
add \$0x70,$len
- jle .Lcbc_dec_tail_collected
+ jle .Lcbc_dec_clear_tail_collected
movups $inout7,($out)
lea 0x10($out),$out
cmp \$0x50,$len
@@ -2759,14 +2990,19 @@ $code.=<<___;
movdqu $inout0,($out)
pxor $in1,$inout2
movdqu $inout1,0x10($out)
+ pxor $inout1,$inout1 # clear register bank
pxor $in2,$inout3
movdqu $inout2,0x20($out)
+ pxor $inout2,$inout2
pxor $in3,$inout4
movdqu $inout3,0x30($out)
+ pxor $inout3,$inout3
pxor $in4,$inout5
movdqu $inout4,0x40($out)
+ pxor $inout4,$inout4
lea 0x50($out),$out
movdqa $inout5,$inout0
+ pxor $inout5,$inout5
jmp .Lcbc_dec_tail_collected
.align 16
@@ -2781,16 +3017,23 @@ $code.=<<___;
movdqu $inout0,($out)
pxor $in1,$inout2
movdqu $inout1,0x10($out)
+ pxor $inout1,$inout1 # clear register bank
pxor $in2,$inout3
movdqu $inout2,0x20($out)
+ pxor $inout2,$inout2
pxor $in3,$inout4
movdqu $inout3,0x30($out)
+ pxor $inout3,$inout3
pxor $in4,$inout5
movdqu $inout4,0x40($out)
+ pxor $inout4,$inout4
pxor $inout7,$inout6
movdqu $inout5,0x50($out)
+ pxor $inout5,$inout5
lea 0x60($out),$out
movdqa $inout6,$inout0
+ pxor $inout6,$inout6
+ pxor $inout7,$inout7
jmp .Lcbc_dec_tail_collected
.align 16
@@ -2834,31 +3077,31 @@ $code.=<<___;
movdqa $inout5,$inout0
add \$0x50,$len
- jle .Lcbc_dec_tail_collected
+ jle .Lcbc_dec_clear_tail_collected
movups $inout5,($out)
lea 0x10($out),$out
.Lcbc_dec_tail:
movups ($inp),$inout0
sub \$0x10,$len
- jbe .Lcbc_dec_one
+ jbe .Lcbc_dec_one # $len is 1*16 or less
movups 0x10($inp),$inout1
movaps $inout0,$in0
sub \$0x10,$len
- jbe .Lcbc_dec_two
+ jbe .Lcbc_dec_two # $len is 2*16 or less
movups 0x20($inp),$inout2
movaps $inout1,$in1
sub \$0x10,$len
- jbe .Lcbc_dec_three
+ jbe .Lcbc_dec_three # $len is 3*16 or less
movups 0x30($inp),$inout3
movaps $inout2,$in2
sub \$0x10,$len
- jbe .Lcbc_dec_four
+ jbe .Lcbc_dec_four # $len is 4*16 or less
- movups 0x40($inp),$inout4
+ movups 0x40($inp),$inout4 # $len is 5*16 or less
movaps $inout3,$in3
movaps $inout4,$in4
xorps $inout5,$inout5
@@ -2869,12 +3112,17 @@ $code.=<<___;
movdqu $inout0,($out)
pxor $in1,$inout2
movdqu $inout1,0x10($out)
+ pxor $inout1,$inout1 # clear register bank
pxor $in2,$inout3
movdqu $inout2,0x20($out)
+ pxor $inout2,$inout2
pxor $in3,$inout4
movdqu $inout3,0x30($out)
+ pxor $inout3,$inout3
lea 0x40($out),$out
movdqa $inout4,$inout0
+ pxor $inout4,$inout4
+ pxor $inout5,$inout5
sub \$0x10,$len
jmp .Lcbc_dec_tail_collected
@@ -2896,6 +3144,7 @@ $code.=<<___;
pxor $in0,$inout1
movdqu $inout0,($out)
movdqa $inout1,$inout0
+ pxor $inout1,$inout1 # clear register bank
lea 0x10($out),$out
jmp .Lcbc_dec_tail_collected
.align 16
@@ -2908,7 +3157,9 @@ $code.=<<___;
movdqu $inout0,($out)
pxor $in1,$inout2
movdqu $inout1,0x10($out)
+ pxor $inout1,$inout1 # clear register bank
movdqa $inout2,$inout0
+ pxor $inout2,$inout2
lea 0x20($out),$out
jmp .Lcbc_dec_tail_collected
.align 16
@@ -2921,41 +3172,71 @@ $code.=<<___;
movdqu $inout0,($out)
pxor $in1,$inout2
movdqu $inout1,0x10($out)
+ pxor $inout1,$inout1 # clear register bank
pxor $in2,$inout3
movdqu $inout2,0x20($out)
+ pxor $inout2,$inout2
movdqa $inout3,$inout0
+ pxor $inout3,$inout3
lea 0x30($out),$out
jmp .Lcbc_dec_tail_collected
.align 16
+.Lcbc_dec_clear_tail_collected:
+ pxor $inout1,$inout1 # clear register bank
+ pxor $inout2,$inout2
+ pxor $inout3,$inout3
+___
+$code.=<<___ if (!$win64);
+ pxor $inout4,$inout4 # %xmm6..9
+ pxor $inout5,$inout5
+ pxor $inout6,$inout6
+ pxor $inout7,$inout7
+___
+$code.=<<___;
.Lcbc_dec_tail_collected:
movups $iv,($ivp)
and \$15,$len
jnz .Lcbc_dec_tail_partial
movups $inout0,($out)
+ pxor $inout0,$inout0
jmp .Lcbc_dec_ret
.align 16
.Lcbc_dec_tail_partial:
movaps $inout0,(%rsp)
+ pxor $inout0,$inout0
mov \$16,%rcx
mov $out,%rdi
sub $len,%rcx
lea (%rsp),%rsi
- .long 0x9066A4F3 # rep movsb
+ .long 0x9066A4F3 # rep movsb
+ movdqa $inout0,(%rsp)
.Lcbc_dec_ret:
+ xorps $rndkey0,$rndkey0 # %xmm0
+ pxor $rndkey1,$rndkey1
___
$code.=<<___ if ($win64);
movaps 0x10(%rsp),%xmm6
+ movaps %xmm0,0x10(%rsp) # clear stack
movaps 0x20(%rsp),%xmm7
+ movaps %xmm0,0x20(%rsp)
movaps 0x30(%rsp),%xmm8
+ movaps %xmm0,0x30(%rsp)
movaps 0x40(%rsp),%xmm9
+ movaps %xmm0,0x40(%rsp)
movaps 0x50(%rsp),%xmm10
+ movaps %xmm0,0x50(%rsp)
movaps 0x60(%rsp),%xmm11
+ movaps %xmm0,0x60(%rsp)
movaps 0x70(%rsp),%xmm12
+ movaps %xmm0,0x70(%rsp)
movaps 0x80(%rsp),%xmm13
+ movaps %xmm0,0x80(%rsp)
movaps 0x90(%rsp),%xmm14
+ movaps %xmm0,0x90(%rsp)
movaps 0xa0(%rsp),%xmm15
+ movaps %xmm0,0xa0(%rsp)
___
$code.=<<___;
lea (%rbp),%rsp
@@ -2965,8 +3246,15 @@ $code.=<<___;
.size ${PREFIX}_cbc_encrypt,.-${PREFIX}_cbc_encrypt
___
}
-# int $PREFIX_set_[en|de]crypt_key (const unsigned char *userKey,
+# int ${PREFIX}_set_decrypt_key(const unsigned char *inp,
# int bits, AES_KEY *key)
+#
+# input: $inp user-supplied key
+# $bits $inp length in bits
+# $key pointer to key schedule
+# output: %eax 0 denoting success, -1 or -2 - failure (see C)
+# *$key key schedule
+#
{ my ($inp,$bits,$key) = @_4args;
$bits =~ s/%r/%e/;
@@ -3003,7 +3291,9 @@ ${PREFIX}_set_decrypt_key:
$movkey ($key),%xmm0 # inverse middle
aesimc %xmm0,%xmm0
+ pxor %xmm1,%xmm1
$movkey %xmm0,($inp)
+ pxor %xmm0,%xmm0
.Ldec_key_ret:
add \$8,%rsp
ret
@@ -3020,6 +3310,22 @@ ___
# Agressively optimized in respect to aeskeygenassist's critical path
# and is contained in %xmm0-5 to meet Win64 ABI requirement.
#
+# int ${PREFIX}_set_encrypt_key(const unsigned char *inp,
+# int bits, AES_KEY * const key);
+#
+# input: $inp user-supplied key
+# $bits $inp length in bits
+# $key pointer to key schedule
+# output: %eax 0 denoting success, -1 or -2 - failure (see C)
+# $bits rounds-1 (used in aesni_set_decrypt_key)
+# *$key key schedule
+# $key pointer to key schedule (used in
+# aesni_set_decrypt_key)
+#
+# Subroutine is frame-less, which means that only volatile registers
+# are used. Note that it's declared "abi-omnipotent", which means that
+# amount of volatile registers is smaller on Windows.
+#
$code.=<<___;
.globl ${PREFIX}_set_encrypt_key
.type ${PREFIX}_set_encrypt_key,\@abi-omnipotent
@@ -3033,9 +3339,11 @@ __aesni_set_encrypt_key:
test $key,$key
jz .Lenc_key_ret
+ mov \$`1<<28|1<<11`,%r10d # AVX and XOP bits
movups ($inp),%xmm0 # pull first 128 bits of *userKey
xorps %xmm4,%xmm4 # low dword of xmm4 is assumed 0
- lea 16($key),%rax
+ and OPENSSL_ia32cap_P+4(%rip),%r10d
+ lea 16($key),%rax # %rax is used as modifiable copy of $key
cmp \$256,$bits
je .L14rounds
cmp \$192,$bits
@@ -3045,6 +3353,9 @@ __aesni_set_encrypt_key:
.L10rounds:
mov \$9,$bits # 10 rounds for 128-bit key
+ cmp \$`1<<28`,%r10d # AVX, bit no XOP
+ je .L10rounds_alt
+
$movkey %xmm0,($key) # round 0
aeskeygenassist \$0x1,%xmm0,%xmm1 # round 1
call .Lkey_expansion_128_cold
@@ -3072,9 +3383,79 @@ __aesni_set_encrypt_key:
jmp .Lenc_key_ret
.align 16
+.L10rounds_alt:
+ movdqa .Lkey_rotate(%rip),%xmm5
+ mov \$8,%r10d
+ movdqa .Lkey_rcon1(%rip),%xmm4
+ movdqa %xmm0,%xmm2
+ movdqu %xmm0,($key)
+ jmp .Loop_key128
+
+.align 16
+.Loop_key128:
+ pshufb %xmm5,%xmm0
+ aesenclast %xmm4,%xmm0
+ pslld \$1,%xmm4
+ lea 16(%rax),%rax
+
+ movdqa %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm3,%xmm2
+
+ pxor %xmm2,%xmm0
+ movdqu %xmm0,-16(%rax)
+ movdqa %xmm0,%xmm2
+
+ dec %r10d
+ jnz .Loop_key128
+
+ movdqa .Lkey_rcon1b(%rip),%xmm4
+
+ pshufb %xmm5,%xmm0
+ aesenclast %xmm4,%xmm0
+ pslld \$1,%xmm4
+
+ movdqa %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm3,%xmm2
+
+ pxor %xmm2,%xmm0
+ movdqu %xmm0,(%rax)
+
+ movdqa %xmm0,%xmm2
+ pshufb %xmm5,%xmm0
+ aesenclast %xmm4,%xmm0
+
+ movdqa %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm2,%xmm3
+ pslldq \$4,%xmm2
+ pxor %xmm3,%xmm2
+
+ pxor %xmm2,%xmm0
+ movdqu %xmm0,16(%rax)
+
+ mov $bits,96(%rax) # 240($key)
+ xor %eax,%eax
+ jmp .Lenc_key_ret
+
+.align 16
.L12rounds:
movq 16($inp),%xmm2 # remaining 1/3 of *userKey
mov \$11,$bits # 12 rounds for 192
+ cmp \$`1<<28`,%r10d # AVX, but no XOP
+ je .L12rounds_alt
+
$movkey %xmm0,($key) # round 0
aeskeygenassist \$0x1,%xmm2,%xmm1 # round 1,2
call .Lkey_expansion_192a_cold
@@ -3098,10 +3479,54 @@ __aesni_set_encrypt_key:
jmp .Lenc_key_ret
.align 16
+.L12rounds_alt:
+ movdqa .Lkey_rotate192(%rip),%xmm5
+ movdqa .Lkey_rcon1(%rip),%xmm4
+ mov \$8,%r10d
+ movdqu %xmm0,($key)
+ jmp .Loop_key192
+
+.align 16
+.Loop_key192:
+ movq %xmm2,0(%rax)
+ movdqa %xmm2,%xmm1
+ pshufb %xmm5,%xmm2
+ aesenclast %xmm4,%xmm2
+ pslld \$1, %xmm4
+ lea 24(%rax),%rax
+
+ movdqa %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm3,%xmm0
+
+ pshufd \$0xff,%xmm0,%xmm3
+ pxor %xmm1,%xmm3
+ pslldq \$4,%xmm1
+ pxor %xmm1,%xmm3
+
+ pxor %xmm2,%xmm0
+ pxor %xmm3,%xmm2
+ movdqu %xmm0,-16(%rax)
+
+ dec %r10d
+ jnz .Loop_key192
+
+ mov $bits,32(%rax) # 240($key)
+ xor %eax,%eax
+ jmp .Lenc_key_ret
+
+.align 16
.L14rounds:
movups 16($inp),%xmm2 # remaning half of *userKey
mov \$13,$bits # 14 rounds for 256
lea 16(%rax),%rax
+ cmp \$`1<<28`,%r10d # AVX, but no XOP
+ je .L14rounds_alt
+
$movkey %xmm0,($key) # round 0
$movkey %xmm2,16($key) # round 1
aeskeygenassist \$0x1,%xmm2,%xmm1 # round 2
@@ -3136,9 +3561,69 @@ __aesni_set_encrypt_key:
jmp .Lenc_key_ret
.align 16
+.L14rounds_alt:
+ movdqa .Lkey_rotate(%rip),%xmm5
+ movdqa .Lkey_rcon1(%rip),%xmm4
+ mov \$7,%r10d
+ movdqu %xmm0,0($key)
+ movdqa %xmm2,%xmm1
+ movdqu %xmm2,16($key)
+ jmp .Loop_key256
+
+.align 16
+.Loop_key256:
+ pshufb %xmm5,%xmm2
+ aesenclast %xmm4,%xmm2
+
+ movdqa %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm0,%xmm3
+ pslldq \$4,%xmm0
+ pxor %xmm3,%xmm0
+ pslld \$1,%xmm4
+
+ pxor %xmm2,%xmm0
+ movdqu %xmm0,(%rax)
+
+ dec %r10d
+ jz .Ldone_key256
+
+ pshufd \$0xff,%xmm0,%xmm2
+ pxor %xmm3,%xmm3
+ aesenclast %xmm3,%xmm2
+
+ movdqa %xmm1,%xmm3
+ pslldq \$4,%xmm1
+ pxor %xmm1,%xmm3
+ pslldq \$4,%xmm1
+ pxor %xmm1,%xmm3
+ pslldq \$4,%xmm1
+ pxor %xmm3,%xmm1
+
+ pxor %xmm1,%xmm2
+ movdqu %xmm2,16(%rax)
+ lea 32(%rax),%rax
+ movdqa %xmm2,%xmm1
+
+ jmp .Loop_key256
+
+.Ldone_key256:
+ mov $bits,16(%rax) # 240($key)
+ xor %eax,%eax
+ jmp .Lenc_key_ret
+
+.align 16
.Lbad_keybits:
mov \$-2,%rax
.Lenc_key_ret:
+ pxor %xmm0,%xmm0
+ pxor %xmm1,%xmm1
+ pxor %xmm2,%xmm2
+ pxor %xmm3,%xmm3
+ pxor %xmm4,%xmm4
+ pxor %xmm5,%xmm5
add \$8,%rsp
ret
.LSEH_end_set_encrypt_key:
@@ -3228,6 +3713,14 @@ $code.=<<___;
.long 0x87,0,1,0
.Lincrement1:
.byte 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1
+.Lkey_rotate:
+ .long 0x0c0f0e0d,0x0c0f0e0d,0x0c0f0e0d,0x0c0f0e0d
+.Lkey_rotate192:
+ .long 0x04070605,0x04070605,0x04070605,0x04070605
+.Lkey_rcon1:
+ .long 1,1,1,1
+.Lkey_rcon1b:
+ .long 0x1b,0x1b,0x1b,0x1b
.asciz "AES for Intel AES-NI, CRYPTOGAMS by <appro\@openssl.org>"
.align 64
@@ -3345,7 +3838,7 @@ cbc_se_handler:
mov 152($context),%rax # pull context->Rsp
mov 248($context),%rbx # pull context->Rip
- lea .Lcbc_decrypt(%rip),%r10
+ lea .Lcbc_decrypt_bulk(%rip),%r10
cmp %r10,%rbx # context->Rip<"prologue" label
jb .Lcommon_seh_tail
generated by cgit v1.1 at 2024-05-23 08:44:08 +0000