![]() |
Welcome to ftp.nluug.nl Current directory: /os/NetBSD/NetBSD-current/src/external/lgpl3/gmp/dist/mpn/mips64/ |
|
Contents of README:Copyright 1996 Free Software Foundation, Inc. This file is part of the GNU MP Library. The GNU MP Library is free software; you can redistribute it and/or modify it under the terms of either: * the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. or * the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. or both in parallel, as here. The GNU MP Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received copies of the GNU General Public License and the GNU Lesser General Public License along with the GNU MP Library. If not, see https://www.gnu.org/licenses/. This directory contains mpn functions optimized for MIPS3. Example of processors that implement MIPS3 are R4000, R4400, R4600, R4700, and R8000. RELEVANT OPTIMIZATION ISSUES 1. On the R4000 and R4400, branches, both the plain and the "likely" ones, take 3 cycles to execute. (The fastest possible loop will take 4 cycles, because of the delay insn.) On the R4600, branches takes a single cycle On the R8000, branches often take no noticeable cycles, as they are executed in a separate function unit.. 2. The R4000 and R4400 have a load latency of 4 cycles. 3. On the R4000 and R4400, multiplies take a data-dependent number of cycles, contrary to the SGI documentation. There seem to be 3 or 4 possible latencies. 4. The R1x000 processors can issue one floating-point operation, two integer operations, and one memory operation per cycle. The FPU has very short latencies, while the integer multiply unit is non-pipelined. We should therefore write fp based mpn_Xmul_1. STATUS Good... |
Name Last modified Size
Parent Directory -
CVS/ 17-Dec-2022 22:27 -
hilo/ 27-Sep-2020 05:01 -
README 23-Aug-2017 05:01 2.0K
add_n.asm 23-Aug-2017 05:01 2.7K
gmp-mparam.h 23-Aug-2017 05:01 2.5K
lshift.asm 23-Aug-2017 05:01 2.2K
rshift.asm 23-Aug-2017 05:01 2.1K
sub_n.asm 23-Aug-2017 05:01 2.7K
NLUUG - Open Systems. Open Standards
Become a member
and get discounts on conferences and more, see the NLUUG website!