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| author | weidai <weidai@57ff6487-cd31-0410-9ec3-f628ee90f5f0> | 2003-10-31 02:40:42 +0000 |
|---|---|---|
| committer | weidai <weidai@57ff6487-cd31-0410-9ec3-f628ee90f5f0> | 2003-10-31 02:40:42 +0000 |
| commit | da0f264557c2eb8ba12926f0ef6baa9ca0a1c734 (patch) | |
| tree | 0529b6d836a13d8f203c2ece1e0b1e22a3eb446d /integer.cpp | |
| parent | 37ef6f4f467be4fcc5d8e366316271b103bab285 (diff) | |
| download | cryptopp-da0f264557c2eb8ba12926f0ef6baa9ca0a1c734.tar.gz | |
avoid read-ahead into invalid memory in P4Optimized::Add
git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@141 57ff6487-cd31-0410-9ec3-f628ee90f5f0
Diffstat (limited to 'integer.cpp')
| -rw-r--r-- | integer.cpp | 52 |
1 files changed, 16 insertions, 36 deletions
diff --git a/integer.cpp b/integer.cpp index 1fee33b..575b431 100644 --- a/integer.cpp +++ b/integer.cpp @@ -1205,46 +1205,36 @@ CRYPTOPP_NAKED word P4Optimized::Add(word *C, const word *A, const word *B, unsi AS2( mov edi, [edx]) AS2( mov ebp, [ebx]) + AS1( jmp carry1AddP4) AS1(loopstartAddP4:) + AS2( mov edi, [edx+8]) + AS2( add ecx, 8) + AS2( add edx, 8) + AS2( mov ebp, [ebx]) AS2( add edi, eax) AS1( jc carry1AddP4) - AS2( xor eax, eax) - AS1(carry1continueAddP4:) + AS1(carry1AddP4:) AS2( add edi, ebp) AS2( mov ebp, 1) AS2( mov [ecx], edi) AS2( mov edi, [edx+4]) AS2( cmovc eax, ebp) AS2( mov ebp, [ebx+4]) - AS2( lea ebx, [ebx+8]) + AS2( add ebx, 8) AS2( add edi, eax) AS1( jc carry2AddP4) - AS2( xor eax, eax) - AS1(carry2continueAddP4:) + AS1(carry2AddP4:) AS2( add edi, ebp) AS2( mov ebp, 1) AS2( cmovc eax, ebp) AS2( mov [ecx+4], edi) - AS2( add ecx, 8) - AS2( mov edi, [edx+8]) - AS2( add edx, 8) AS2( add esi, 2) - AS2( mov ebp, [ebx]) AS1( jnz loopstartAddP4) - AS1( jmp loopendAddP4) - - AS1(carry1AddP4:) - AS2( mov eax, 1) - AS1( jmp carry1continueAddP4) - - AS1(carry2AddP4:) - AS2( mov eax, 1) - AS1( jmp carry2continueAddP4) AS1(loopendAddP4:) @@ -1262,46 +1252,36 @@ CRYPTOPP_NAKED word P4Optimized::Subtract(word *C, const word *A, const word *B, AS2( mov edi, [edx]) AS2( mov ebp, [ebx]) + AS1( jmp carry1SubP4) AS1(loopstartSubP4:) + AS2( mov edi, [edx+8]) + AS2( add edx, 8) + AS2( add ecx, 8) + AS2( mov ebp, [ebx]) AS2( sub edi, eax) AS1( jc carry1SubP4) - AS2( xor eax, eax) - AS1(carry1continueSubP4:) + AS1(carry1SubP4:) AS2( sub edi, ebp) AS2( mov ebp, 1) AS2( mov [ecx], edi) AS2( mov edi, [edx+4]) AS2( cmovc eax, ebp) AS2( mov ebp, [ebx+4]) - AS2( lea ebx, [ebx+8]) + AS2( add ebx, 8) AS2( sub edi, eax) AS1( jc carry2SubP4) - AS2( xor eax, eax) - AS1(carry2continueSubP4:) + AS1(carry2SubP4:) AS2( sub edi, ebp) AS2( mov ebp, 1) AS2( cmovc eax, ebp) AS2( mov [ecx+4], edi) - AS2( add ecx, 8) - AS2( mov edi, [edx+8]) - AS2( add edx, 8) AS2( add esi, 2) - AS2( mov ebp, [ebx]) AS1( jnz loopstartSubP4) - AS1( jmp loopendSubP4) - - AS1(carry1SubP4:) - AS2( mov eax, 1) - AS1( jmp carry1continueSubP4) - - AS1(carry2SubP4:) - AS2( mov eax, 1) - AS1( jmp carry2continueSubP4) AS1(loopendSubP4:) |