6 files changed, 19 insertions, 0 deletions
diff --git a/src/block/aes_intel/aes_intel.h b/src/block/aes_intel/aes_intel.h
index 164655072..239516e24 100644
--- a/src/block/aes_intel/aes_intel.h
+++ b/src/block/aes_intel/aes_intel.h
@@ -18,6 +18,8 @@ namespace Botan {
 class BOTAN_DLL AES_128_Intel : public BlockCipher
    {
    public:
+      u32bit parallelism() const { return 8; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
@@ -38,6 +40,8 @@ class BOTAN_DLL AES_128_Intel : public BlockCipher
 class BOTAN_DLL AES_192_Intel : public BlockCipher
    {
    public:
+      u32bit parallelism() const { return 8; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
@@ -58,6 +62,8 @@ class BOTAN_DLL AES_192_Intel : public BlockCipher
 class BOTAN_DLL AES_256_Intel : public BlockCipher
    {
    public:
+      u32bit parallelism() const { return 8; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
diff --git a/src/block/block_cipher.h b/src/block/block_cipher.h
index 06e8c5cea..2d9198c58 100644
--- a/src/block/block_cipher.h
+++ b/src/block/block_cipher.h
@@ -24,6 +24,11 @@ class BOTAN_DLL BlockCipher : public SymmetricAlgorithm
       const u32bit BLOCK_SIZE;
 
       /**
+      * @return the preferred parallelism of this cipher
+      */
+      virtual u32bit parallelism() const { return 4; }
+
+      /**
       * Encrypt a block.
       * @param in The plaintext block to be encrypted as a byte array.
       * Must be of length BLOCK_SIZE.
diff --git a/src/block/idea_sse2/idea_sse2.h b/src/block/idea_sse2/idea_sse2.h
index 167c981f8..657581d74 100644
--- a/src/block/idea_sse2/idea_sse2.h
+++ b/src/block/idea_sse2/idea_sse2.h
@@ -18,6 +18,8 @@ namespace Botan {
 class BOTAN_DLL IDEA_SSE2 : public IDEA
    {
    public:
+      u32bit parallelism() const { return 16; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
diff --git a/src/block/noekeon_simd/noekeon_simd.h b/src/block/noekeon_simd/noekeon_simd.h
index 466c4b741..55fdfbd22 100644
--- a/src/block/noekeon_simd/noekeon_simd.h
+++ b/src/block/noekeon_simd/noekeon_simd.h
@@ -18,6 +18,8 @@ namespace Botan {
 class BOTAN_DLL Noekeon_SIMD : public Noekeon
    {
    public:
+      u32bit parallelism() const { return 8; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
diff --git a/src/block/serpent_simd/serp_simd.h b/src/block/serpent_simd/serp_simd.h
index 1ecb70159..dc2b08736 100644
--- a/src/block/serpent_simd/serp_simd.h
+++ b/src/block/serpent_simd/serp_simd.h
@@ -18,6 +18,8 @@ namespace Botan {
 class BOTAN_DLL Serpent_SIMD : public Serpent
    {
    public:
+      u32bit parallelism() const { return 8; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
 
diff --git a/src/block/xtea_simd/xtea_simd.h b/src/block/xtea_simd/xtea_simd.h
index e4ce734ed..04a4977ae 100644
--- a/src/block/xtea_simd/xtea_simd.h
+++ b/src/block/xtea_simd/xtea_simd.h
@@ -18,6 +18,8 @@ namespace Botan {
 class BOTAN_DLL XTEA_SIMD : public XTEA
    {
    public:
+      u32bit parallelism() const { return 16; }
+
       void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
       void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
       BlockCipher* clone() const { return new XTEA_SIMD; }