Don't allocate space for a stack copy of the input.

Rev: src/nettle/x86/md5-compress.asm:1.5

diff --git a/x86/md5-compress.asm b/x86/md5-compress.asm
index a56386a33ac8b2f8d61fd0a41335d4dade08c497..58d9b9799750854c19a15032c091c3549fc3aa18 100644 (file)
--- 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