Set parallelism defaults.

Default unless specified is now 4.

For SIMD code, use 2x the number of blocks which are processed in
parallel using SIMD by that cipher. It may make sense to increase this to
4x or even more, further experimentation is necessary.

1 files changed, 6 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;