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pull/778/head
Jeffrey Walton 2019-01-03 13:17:27 -05:00
parent a79fe3a826
commit 8baa2f7a27
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16
lea_simd.cpp
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@ -44,18 +44,18 @@
#endif
// Do not port this to POWER architecture. Naively we hoped
// for a 2x to 3x speedup. The result was a 5x slow down
// because of the rotates and scattered loads.
// for a 2x to 3x speedup. The result was a 5x slow down.
// The table below shows MiB/s and cpb.
//
// C++:
// <TD>LEA-128(128)/CTR (128-bit key)<TD>C++<TD>207<TD>15.64<TD>0.593<TD>2015
// <TD>LEA-128(192)/CTR (192-bit key)<TD>C++<TD>186<TD>17.48<TD>0.699<TD>2378
// <TD>LEA-128(256)/CTR (256-bit key)<TD>C++<TD>124<TD>26.2<TD>0.842<TD>2861
// <TD>LEA-128(128)/CTR (128-bit key)<TD>C++<TD>207<TD>15.64
// <TD>LEA-128(192)/CTR (192-bit key)<TD>C++<TD>186<TD>17.48
// <TD>LEA-128(256)/CTR (256-bit key)<TD>C++<TD>124<TD>26.2
//
// Power8:
// <TD>LEA-128(128)/CTR (128-bit key)<TD>Power8<TD>37<TD>88.7<TD>0.595<TD>2023
// <TD>LEA-128(192)/CTR (192-bit key)<TD>Power8<TD>40<TD>82.1<TD>0.699<TD>2375
// <TD>LEA-128(256)/CTR (256-bit key)<TD>Power8<TD>28<TD>116.0<TD>1.006<TD>3419
// <TD>LEA-128(128)/CTR (128-bit key)<TD>Power8<TD>37<TD>88.7
// <TD>LEA-128(192)/CTR (192-bit key)<TD>Power8<TD>40<TD>82.1
// <TD>LEA-128(256)/CTR (256-bit key)<TD>Power8<TD>28<TD>116.0
#undef CRYPTOPP_POWER8_AVAILABLE
#if defined(CRYPTOPP_POWER8_AVAILABLE)