From 51a08ad79dcc95e7892537a33c19328ab68e70c0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20M=C3=B6ller?= <nisse@lysator.liu.se>
Date: Thu, 13 Oct 2005 14:31:01 +0200
Subject: [PATCH] Don't allocate space for a stack copy of the input.
Rev: src/nettle/x86/md5-compress.asm:1.5
---
x86/md5-compress.asm | 25 ++++++++++++-------------
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/x86/md5-compress.asm b/x86/md5-compress.asm
index a56386a3..58d9b979 100644
--- a/x86/md5-compress.asm
+++ b/x86/md5-compress.asm
@@ -24,7 +24,6 @@ define(<SC>,<%ecx>)
define(<SD>,<%edx>)
define(<TMP>,<%ebp>)
define(<INPUT>,<%esi>)
-C define(<DATA>,<%esp>)
C %edi is unused
@@ -72,24 +71,25 @@ define(<ROUND>,<
.align 16
PROLOGUE(_nettle_md5_compress)
C save all registers that need to be saved
-
- pushl %ebx C 76(%esp)
- pushl %ebp C 72(%esp)
- pushl %esi C 68(%esp)
- pushl %edi C 64(%esp)
- subl $64, %esp C %esp = W
+ C 24(%esp) input
+ C 20(%esp) state
+ C 16(%esp) Return address
+ pushl %ebx C 12(%esp)
+ pushl %ebp C 8(%esp)
+ pushl %esi C 4(%esp)
+ pushl %edi C (%esp)
C load the state vector
- movl 84(%esp),TMP
+ movl 20(%esp),TMP
movl (TMP), SA
movl 4(TMP), SB
movl 8(TMP), SC
movl 12(TMP), SD
- C Pointer to source data. We copy it to aligned storage
- C at %esp when we first use it.
- movl 88(%esp), INPUT
+ C Pointer to source data.
+ C Note that if analigned, we suffer unaligned accesses
+ movl 24(%esp), INPUT
ROUND(<F1>, SA, SB, SC, SD, REF( 0), $0xd76aa478, 7)
ROUND(<F1>, SD, SA, SB, SC, REF( 1), $0xe8c7b756, 12)
@@ -160,13 +160,12 @@ PROLOGUE(_nettle_md5_compress)
ROUND(<F4>, SB, SC, SD, SA, REF( 9), $0xeb86d391, 21)
C Update the state vector
- movl 84(%esp),TMP
+ movl 20(%esp),TMP
addl SA, (TMP)
addl SB, 4(TMP)
addl SC, 8(TMP)
addl SD, 12(TMP)
- addl $64, %esp
popl %edi
popl %esi
popl %ebp
--
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