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Diffstat (limited to 'src/lib/ppc405lib/lfsr.h')
-rw-r--r-- | src/lib/ppc405lib/lfsr.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/lib/ppc405lib/lfsr.h b/src/lib/ppc405lib/lfsr.h new file mode 100644 index 0000000..951ec45 --- /dev/null +++ b/src/lib/ppc405lib/lfsr.h @@ -0,0 +1,46 @@ +/* IBM_PROLOG_BEGIN_TAG */ +/* This is an automatically generated prolog. */ +/* */ +/* $Source: src/lib/ppc405lib/lfsr.h $ */ +/* */ +/* OpenPOWER OnChipController Project */ +/* */ +/* Contributors Listed Below - COPYRIGHT 2015 */ +/* [+] International Business Machines Corp. */ +/* */ +/* */ +/* Licensed under the Apache License, Version 2.0 (the "License"); */ +/* you may not use this file except in compliance with the License. */ +/* You may obtain a copy of the License at */ +/* */ +/* http://www.apache.org/licenses/LICENSE-2.0 */ +/* */ +/* Unless required by applicable law or agreed to in writing, software */ +/* distributed under the License is distributed on an "AS IS" BASIS, */ +/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */ +/* implied. See the License for the specific language governing */ +/* permissions and limitations under the License. */ +/* */ +/* IBM_PROLOG_END_TAG */ +#ifndef __LFSR_H__ +#define __LFSR_H__ + +/// \file lfsr.h +/// \brief Linear-Feedback Shift Register Implementations +/// +/// The 32- and 64-bit pseudo-random number generators in this library are of +/// the linear-conguential type. These maximal-length LFSR pseudo-random +/// sequence generators are also provided. + +/// 64-bit LFSR +/// +/// \param[in,out] io_seed The input seed is converted in one step to the +/// output seed. +/// +/// This 64-bit LFSR uses taps 64, 63, 61, and 60. In big-endian numbering +/// these are bits 0, 1, 3 and 4. This LFSR is also implemented for the PORE +/// engines in the file pore_rand.pS. +void +_lfsr64(uint64_t* io_seed); + +#endif // __LFSR_H__ |