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Commit 3f7e33fd authored by Niels Möller's avatar Niels Möller
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* x86/aes.asm: Use C for comments, include the tables using 

include_src, and commented out the key setup functions.

Rev: src/nettle/x86/aes.asm:1.3
parent be3e8011
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! nettle, low-level cryptographics library C nettle, low-level cryptographics library
! C
! Copyright (C) 2001, 2002 Rafael R. Sevilla C Copyright (C) 2001, 2002 Rafael R. Sevilla
! C
! The nettle library is free software; you can redistribute it and/or modify C The nettle library is free software; you can redistribute it and/or modify
! it under the terms of the GNU Lesser General Public License as published by C it under the terms of the GNU Lesser General Public License as published by
! the Free Software Foundation; either version 2.1 of the License, or (at your C the Free Software Foundation; either version 2.1 of the License, or (at your
! option) any later version. C option) any later version.
! C
! The nettle library is distributed in the hope that it will be useful, but C The nettle library is distributed in the hope that it will be useful, but
! WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY C WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public C or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
! License for more details. C License for more details.
! C
! You should have received a copy of the GNU Lesser General Public License C You should have received a copy of the GNU Lesser General Public License
! along with the nettle library; see the file COPYING.LIB. If not, write to C along with the nettle library; see the file COPYING.LIB. If not, write to
! the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, C the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
! MA 02111-1307, USA. C MA 02111-1307, USA.
.file "rijndael.s" .file "aes.asm"
.data .data
#include "rijndaeltbls.S" include_src(<x86/aes_tables.asm>)
.text .text
.globl print_word .globl print_word
//// rijndael_encrypt(RIJNDAEL_context *ctx, const UINT8 *plaintext C aes_encrypt(struct aes_context *ctx,
//// UINT8 *ciphertext) C unsigned length, uint8_t *dst,
C uint8_t *src)
C const UINT8 *plaintext
C // UINT8 *ciphertext)
.align 16 .align 16
.globl rijndael_encrypt .globl aes_encrypt
.type rijndael_encrypt,@function .type aes_encrypt,@function
rijndael_encrypt: aes_encrypt:
//// save all registers that need to be saved C // save all registers that need to be saved
pushl %ebx // 16(%esp) pushl %ebx C 16(%esp)
pushl %ebp // 12(%esp) pushl %ebp C 12(%esp)
pushl %esi // 8(%esp) pushl %esi C 8(%esp)
pushl %edi // 4(%esp) pushl %edi C 4(%esp)
movl 24(%esp),%esi // address of plaintext movl 24(%esp),%esi C address of plaintext
movl (%esi),%eax // load plaintext into registers movl (%esi),%eax C load plaintext into registers
movl 4(%esi),%ebx movl 4(%esi),%ebx
movl 8(%esi),%ecx movl 8(%esi),%ecx
movl 12(%esi),%edx movl 12(%esi),%edx
movl 20(%esp),%esi // address of context struct ctx movl 20(%esp),%esi C address of context struct ctx
xorl (%esi),%eax // add first key to plaintext xorl (%esi),%eax C add first key to plaintext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
movl 20(%esp),%ebp // address of context struct movl 20(%esp),%ebp C address of context struct
movl 480(%ebp),%ebp // get number of rounds to do from struct movl 480(%ebp),%ebp C get number of rounds to do from struct
subl $1,%ebp subl $1,%ebp
addl $16,%esi // point to next key addl $16,%esi C point to next key
.encrypt_loop: .encrypt_loop:
pushl %esi // save this first: we'll clobber it later pushl %esi C save this first: we'll clobber it later
//// First column C // First column
shll $2,%esi // index in dtbl1 shll $2,%esi C index in dtbl1
movl dtbl1(%esi),%edi movl dtbl1(%esi),%edi
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl dtbl2(%esi),%edi xorl dtbl2(%esi),%edi
movl %ecx,%esi // third one movl %ecx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl3(%esi),%edi xorl dtbl3(%esi),%edi
movl %edx,%esi // fourth one movl %edx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl4(%esi),%edi xorl dtbl4(%esi),%edi
pushl %edi // save first on stack pushl %edi C save first on stack
//// Second column C // Second column
movl %ebx,%esi // copy first in movl %ebx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in dtbl1 shll $2,%esi C index in dtbl1
movl dtbl1(%esi),%edi movl dtbl1(%esi),%edi
movl %ecx,%esi // second one movl %ecx,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl dtbl2(%esi),%edi xorl dtbl2(%esi),%edi
movl %edx,%esi // third one movl %edx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl3(%esi),%edi xorl dtbl3(%esi),%edi
movl %eax,%esi // fourth one movl %eax,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl4(%esi),%edi xorl dtbl4(%esi),%edi
pushl %edi // save first on stack pushl %edi C save first on stack
//// Third column C // Third column
movl %ecx,%esi // copy first in movl %ecx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in dtbl1 shll $2,%esi C index in dtbl1
movl dtbl1(%esi),%edi movl dtbl1(%esi),%edi
movl %edx,%esi // second one movl %edx,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl dtbl2(%esi),%edi xorl dtbl2(%esi),%edi
movl %eax,%esi // third one movl %eax,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl3(%esi),%edi xorl dtbl3(%esi),%edi
movl %ebx,%esi // fourth one movl %ebx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl4(%esi),%edi xorl dtbl4(%esi),%edi
pushl %edi // save first on stack pushl %edi C save first on stack
//// Fourth column C // Fourth column
movl %edx,%esi // copy first in movl %edx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in dtbl1 shll $2,%esi C index in dtbl1
movl dtbl1(%esi),%edi movl dtbl1(%esi),%edi
movl %eax,%esi // second one movl %eax,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl dtbl2(%esi),%edi xorl dtbl2(%esi),%edi
movl %ebx,%esi // third one movl %ebx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl3(%esi),%edi xorl dtbl3(%esi),%edi
movl %ecx,%esi // fourth one movl %ecx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl dtbl4(%esi),%edi xorl dtbl4(%esi),%edi
...@@ -133,16 +136,16 @@ rijndael_encrypt: ...@@ -133,16 +136,16 @@ rijndael_encrypt:
popl %ebx popl %ebx
popl %eax popl %eax
popl %esi popl %esi
xorl (%esi),%eax // add current session key to plaintext xorl (%esi),%eax C add current session key to plaintext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
addl $16,%esi // point to next key addl $16,%esi C point to next key
decl %ebp decl %ebp
jnz .encrypt_loop jnz .encrypt_loop
//// last round C // last round
//// first column C // first column
movl %eax,%edi movl %eax,%edi
andl $0x000000ff,%edi andl $0x000000ff,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -156,7 +159,7 @@ rijndael_encrypt: ...@@ -156,7 +159,7 @@ rijndael_encrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// second column C // second column
movl %eax,%edi movl %eax,%edi
andl $0x0000ff00,%edi andl $0x0000ff00,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -170,7 +173,7 @@ rijndael_encrypt: ...@@ -170,7 +173,7 @@ rijndael_encrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// third column C // third column
movl %eax,%edi movl %eax,%edi
andl $0x00ff0000,%edi andl $0x00ff0000,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -184,7 +187,7 @@ rijndael_encrypt: ...@@ -184,7 +187,7 @@ rijndael_encrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// fourth column C // fourth column
movl %eax,%edi movl %eax,%edi
andl $0xff000000,%edi andl $0xff000000,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -202,7 +205,7 @@ rijndael_encrypt: ...@@ -202,7 +205,7 @@ rijndael_encrypt:
popl %eax popl %eax
xchgl %ebx,%edx xchgl %ebx,%edx
//// S-box substitution C // S-box substitution
mov $4,%edi mov $4,%edi
.sb_sub: .sb_sub:
movl %eax,%ebp movl %eax,%ebp
...@@ -228,12 +231,12 @@ rijndael_encrypt: ...@@ -228,12 +231,12 @@ rijndael_encrypt:
decl %edi decl %edi
jnz .sb_sub jnz .sb_sub
xorl (%esi),%eax // add last key to plaintext xorl (%esi),%eax C add last key to plaintext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
//// store encrypted data back to caller's buffer C // store encrypted data back to caller's buffer
movl 28(%esp),%edi movl 28(%esp),%edi
movl %eax,(%edi) movl %eax,(%edi)
movl %ebx,4(%edi) movl %ebx,4(%edi)
...@@ -245,112 +248,112 @@ rijndael_encrypt: ...@@ -245,112 +248,112 @@ rijndael_encrypt:
popl %ebx popl %ebx
ret ret
.eore: .eore:
.size rijndael_encrypt,.eore-rijndael_encrypt .size aes_encrypt,.eore-aes_encrypt
//// rijndael_decrypt(RIJNDAEL_context *ctx, const UINT8 *ciphertext C // aes_decrypt(AES_context *ctx, const UINT8 *ciphertext
//// UINT8 *plaintext) C // UINT8 *plaintext)
.align 16 .align 16
.globl rijndael_decrypt .globl aes_decrypt
.type rijndael_decrypt,@function .type aes_decrypt,@function
rijndael_decrypt: aes_decrypt:
//// save all registers that need to be saved C // save all registers that need to be saved
pushl %ebx // 16(%esp) pushl %ebx C 16(%esp)
pushl %ebp // 12(%esp) pushl %ebp C 12(%esp)
pushl %esi // 8(%esp) pushl %esi C 8(%esp)
pushl %edi // 4(%esp) pushl %edi C 4(%esp)
movl 24(%esp),%esi // address of ciphertext movl 24(%esp),%esi C address of ciphertext
movl (%esi),%eax // load ciphertext into registers movl (%esi),%eax C load ciphertext into registers
movl 4(%esi),%ebx movl 4(%esi),%ebx
movl 8(%esi),%ecx movl 8(%esi),%ecx
movl 12(%esi),%edx movl 12(%esi),%edx
movl 20(%esp),%esi // address of context struct ctx movl 20(%esp),%esi C address of context struct ctx
movl 480(%esi),%ebp // get number of rounds to do from struct movl 480(%esi),%ebp C get number of rounds to do from struct
shll $4,%ebp shll $4,%ebp
leal 240(%esi, %ebp),%esi leal 240(%esi, %ebp),%esi
shrl $4,%ebp shrl $4,%ebp
xorl (%esi),%eax // add last key to ciphertext xorl (%esi),%eax C add last key to ciphertext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
subl $1,%ebp // one round is complete subl $1,%ebp C one round is complete
subl $16,%esi // point to previous key subl $16,%esi C point to previous key
.decrypt_loop: .decrypt_loop:
pushl %esi // save this first: we'll clobber it later pushl %esi C save this first: we'll clobber it later
xchgl %ebx,%edx xchgl %ebx,%edx
//// First column C // First column
movl %eax,%esi // copy first in movl %eax,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in itbl1 shll $2,%esi C index in itbl1
movl itbl1(%esi),%edi movl itbl1(%esi),%edi
movl %ebx,%esi // second one movl %ebx,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl itbl2(%esi),%edi xorl itbl2(%esi),%edi
movl %ecx,%esi // third one movl %ecx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl3(%esi),%edi xorl itbl3(%esi),%edi
movl %edx,%esi // fourth one movl %edx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl4(%esi),%edi xorl itbl4(%esi),%edi
pushl %edi // save first on stack pushl %edi C save first on stack
//// Second column C // Second column
movl %edx,%esi // copy first in movl %edx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in itbl1 shll $2,%esi C index in itbl1
movl itbl1(%esi),%edi movl itbl1(%esi),%edi
movl %eax,%esi // second one movl %eax,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl itbl2(%esi),%edi xorl itbl2(%esi),%edi
movl %ebx,%esi // third one movl %ebx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl3(%esi),%edi xorl itbl3(%esi),%edi
movl %ecx,%esi // fourth one movl %ecx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl4(%esi),%edi xorl itbl4(%esi),%edi
pushl %edi pushl %edi
//// Third column C // Third column
movl %ecx,%esi // copy first in movl %ecx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in itbl1 shll $2,%esi C index in itbl1
movl itbl1(%esi),%edi movl itbl1(%esi),%edi
movl %edx,%esi // second one movl %edx,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl itbl2(%esi),%edi xorl itbl2(%esi),%edi
movl %eax,%esi // third one movl %eax,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl3(%esi),%edi xorl itbl3(%esi),%edi
movl %ebx,%esi // fourth one movl %ebx,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl4(%esi),%edi xorl itbl4(%esi),%edi
pushl %edi // save first on stack pushl %edi C save first on stack
//// Fourth column C // Fourth column
movl %ebx,%esi // copy first in movl %ebx,%esi C copy first in
andl $0x000000ff,%esi // clear all but offset andl $0x000000ff,%esi C clear all but offset
shll $2,%esi // index in itbl1 shll $2,%esi C index in itbl1
movl itbl1(%esi),%edi movl itbl1(%esi),%edi
movl %ecx,%esi // second one movl %ecx,%esi C second one
shrl $6,%esi shrl $6,%esi
andl $0x000003fc,%esi // clear all but offset bytes andl $0x000003fc,%esi C clear all but offset bytes
xorl itbl2(%esi),%edi xorl itbl2(%esi),%edi
movl %edx,%esi // third one movl %edx,%esi C third one
shrl $14,%esi shrl $14,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl3(%esi),%edi xorl itbl3(%esi),%edi
movl %eax,%esi // fourth one movl %eax,%esi C fourth one
shrl $22,%esi shrl $22,%esi
andl $0x000003fc,%esi andl $0x000003fc,%esi
xorl itbl4(%esi),%edi xorl itbl4(%esi),%edi
...@@ -359,18 +362,18 @@ rijndael_decrypt: ...@@ -359,18 +362,18 @@ rijndael_decrypt:
popl %ebx popl %ebx
popl %eax popl %eax
popl %esi popl %esi
xorl (%esi),%eax // add current session key to plaintext xorl (%esi),%eax C add current session key to plaintext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
subl $16,%esi // point to previous key subl $16,%esi C point to previous key
decl %ebp decl %ebp
jnz .decrypt_loop jnz .decrypt_loop
xchgl %ebx,%edx xchgl %ebx,%edx
//// last round C // last round
//// first column C // first column
movl %eax,%edi movl %eax,%edi
andl $0x000000ff,%edi andl $0x000000ff,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -384,7 +387,7 @@ rijndael_decrypt: ...@@ -384,7 +387,7 @@ rijndael_decrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// second column C // second column
movl %eax,%edi movl %eax,%edi
andl $0xff000000,%edi andl $0xff000000,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -398,7 +401,7 @@ rijndael_decrypt: ...@@ -398,7 +401,7 @@ rijndael_decrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// third column C // third column
movl %eax,%edi movl %eax,%edi
andl $0x00ff0000,%edi andl $0x00ff0000,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -412,7 +415,7 @@ rijndael_decrypt: ...@@ -412,7 +415,7 @@ rijndael_decrypt:
orl %ebp,%edi orl %ebp,%edi
pushl %edi pushl %edi
//// second column C // second column
movl %eax,%edi movl %eax,%edi
andl $0x0000ff00,%edi andl $0x0000ff00,%edi
movl %ebx,%ebp movl %ebx,%ebp
...@@ -430,7 +433,7 @@ rijndael_decrypt: ...@@ -430,7 +433,7 @@ rijndael_decrypt:
popl %eax popl %eax
xchgl %ebx,%edx xchgl %ebx,%edx
//// inverse S-box substitution C // inverse S-box substitution
mov $4,%edi mov $4,%edi
.isb_sub: .isb_sub:
movl %eax,%ebp movl %eax,%ebp
...@@ -456,12 +459,12 @@ rijndael_decrypt: ...@@ -456,12 +459,12 @@ rijndael_decrypt:
decl %edi decl %edi
jnz .isb_sub jnz .isb_sub
xorl (%esi),%eax // add first key to plaintext xorl (%esi),%eax C add first key to plaintext
xorl 4(%esi),%ebx xorl 4(%esi),%ebx
xorl 8(%esi),%ecx xorl 8(%esi),%ecx
xorl 12(%esi),%edx xorl 12(%esi),%edx
//// store decrypted data back to caller's buffer C // store decrypted data back to caller's buffer
movl 28(%esp),%edi movl 28(%esp),%edi
movl %eax,(%edi) movl %eax,(%edi)
movl %ebx,4(%edi) movl %ebx,4(%edi)
...@@ -473,47 +476,47 @@ rijndael_decrypt: ...@@ -473,47 +476,47 @@ rijndael_decrypt:
popl %ebx popl %ebx
ret ret
.eord: .eord:
.size rijndael_decrypt,.eord-rijndael_decrypt .size aes_decrypt,.eord-aes_decrypt
.align 16 C .align 16
.globl rijndael_setup C .globl aes_setup
.type rijndael_setup,@function C .type aes_setup,@function
rijndael_decrypt: C aes_decrypt:
//// save all registers that need to be saved C C // save all registers that need to be saved
pushl %ebx // 16(%esp) C pushl %ebx C 16(%esp)
pushl %ebp // 12(%esp) C pushl %ebp C 12(%esp)
pushl %esi // 8(%esp) C pushl %esi C 8(%esp)
pushl %edi // 4(%esp) C pushl %edi C 4(%esp)
movl 20(%esp),%esi /* context structure */ C movl 20(%esp),%esi /* context structure */
movl 24(%esp),%ecx /* key size */ C movl 24(%esp),%ecx /* key size */
movl 28(%esp),%edi /* original key */ C movl 28(%esp),%edi /* original key */
/* This code assumes that the key length given is greater than C /* This code assumes that the key length given is greater than
or equal to 4 words (128 bits). BAD THINGS WILL HAPPEN C or equal to 4 words (128 bits). BAD THINGS WILL HAPPEN
OTHERWISE! */ C OTHERWISEC */
shrl $2,%ecx /* divide by 4 to get total key length */ C shrl $2,%ecx /* divide by 4 to get total key length */
movl %ecx,%edx /* calculate the number of rounds */ C movl %ecx,%edx /* calculate the number of rounds */
addl $6,%edx /* key length in words + 6 = num. rounds */ C addl $6,%edx /* key length in words + 6 = num. rounds */
/* copy the initial key into the context structure */ C /* copy the initial key into the context structure */
pushl %ecx C pushl %ecx
.key_copy_loop: C .key_copy_loop:
movl (%edi),%eax C movl (%edi),%eax
addl $4,%edi C addl $4,%edi
movl %eax,(%esi) C movl %eax,(%esi)
addl $4,%esi C addl $4,%esi
decl %ecx C decl %ecx
jnz .key_copy_loop C jnz .key_copy_loop
popl %ecx C popl %ecx
incl %edx /* number of rounds + 1 */ C incl %edx /* number of rounds + 1 */
shll $2,%edx /* times rijndael blk size 4words */ C shll $2,%edx /* times aes blk size 4words */
subl %ecx,%edx /* # of other keys to make */ C subl %ecx,%edx /* # of other keys to make */
movl %ecx,%ebp C movl %ecx,%ebp
decl %ecx /* turn ecx into a mask */ C decl %ecx /* turn ecx into a mask */
movl $1,%ebx /* round constant */ C movl $1,%ebx /* round constant */
.keygen_loop: C .keygen_loop:
movl -4(%esi),%eax /* previous key */ C movl -4(%esi),%eax /* previous key */
testl %ecx,%ebp C testl %ecx,%ebp
jnz .testnk C jnz .testnk
/* rotate and substitute */ C /* rotate and substitute */
roll $8,%eax C roll $8,%eax
movl %eax,%edi C movl %eax,%edi
andl $0xff,%eax C andl $0xff,%eax
0% or .
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