Commit 27e90cc8 authored by Niels Möller's avatar Niels Möller

(aes_decrypt): Use the AES_LOAD macro.

Rev: src/nettle/x86/aes-decrypt.asm:1.3
parent 934c1628
......@@ -22,11 +22,12 @@ C MA 02111-1307, USA.
C aes_decrypt(struct aes_context *ctx,
C unsigned length, uint8_t *dst,
C uint8_t *src)
.text
.align 16
.globl aes_decrypt
.globl aes_decrypt
.type aes_decrypt,@function
aes_decrypt:
C // save all registers that need to be saved
C save all registers that need to be saved
pushl %ebx C 16(%esp)
pushl %ebp C 12(%esp)
pushl %esi C 8(%esp)
......@@ -38,24 +39,28 @@ aes_decrypt:
C src = 32(%esp)
movl 24(%esp), %ebp
C What's the right way to set the flags?
addl $0, %ebp
testl %ebp,%ebp
jz .Ldecrypt_end
.Ldecrypt_block_loop:
movl 32(%esp),%esi C address of ciphertext
movl (%esi),%eax C load ciphertext into registers
movl 4(%esi),%ebx
movl 8(%esi),%ecx
movl 12(%esi),%edx
movl 20(%esp),%esi C address of context struct ctx
movl 32(%esp),%ebp C address of plaintext
AES_LOAD(%esi, %ebp)
addl $16, 32(%esp) C Increment src pointer
movl 20(%esp),%esi C address of context struct ctx
xorl (%esi),%eax C add first key to ciphertext
xorl 4(%esi),%ebx
xorl 8(%esi),%ecx
xorl 12(%esi),%edx
C movl 32(%esp),%esi C address of ciphertext
C movl (%esi),%eax C load ciphertext into registers
C movl 4(%esi),%ebx
C movl 8(%esi),%ecx
C movl 12(%esi),%edx
C
C addl $16, 32(%esp) C Increment src pointer
C
C movl 20(%esp),%esi C address of context struct ctx
C xorl (%esi),%eax C add first key to ciphertext
C xorl 4(%esi),%ebx
C xorl 8(%esi),%ecx
C xorl 12(%esi),%edx
movl AES_NROUNDS (%esi),%ebp C get number of rounds to do from struct
C shll $4,%ebp
C leal 240(%esi, %ebp),%esi
......
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