1 1.1 mrg Copyright 2002, 2005 Free Software Foundation, Inc. 2 1.1 mrg 3 1.1 mrg This file is part of the GNU MP Library. 4 1.1 mrg 5 1.1.1.2 mrg The GNU MP Library is free software; you can redistribute it and/or modify 6 1.1.1.2 mrg it under the terms of either: 7 1.1.1.2 mrg 8 1.1.1.2 mrg * the GNU Lesser General Public License as published by the Free 9 1.1.1.2 mrg Software Foundation; either version 3 of the License, or (at your 10 1.1.1.2 mrg option) any later version. 11 1.1.1.2 mrg 12 1.1.1.2 mrg or 13 1.1.1.2 mrg 14 1.1.1.2 mrg * the GNU General Public License as published by the Free Software 15 1.1.1.2 mrg Foundation; either version 2 of the License, or (at your option) any 16 1.1.1.2 mrg later version. 17 1.1.1.2 mrg 18 1.1.1.2 mrg or both in parallel, as here. 19 1.1 mrg 20 1.1 mrg The GNU MP Library is distributed in the hope that it will be useful, but 21 1.1.1.2 mrg WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 22 1.1.1.2 mrg or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 23 1.1 mrg for more details. 24 1.1 mrg 25 1.1.1.2 mrg You should have received copies of the GNU General Public License and the 26 1.1.1.2 mrg GNU Lesser General Public License along with the GNU MP Library. If not, 27 1.1.1.2 mrg see https://www.gnu.org/licenses/. 28 1.1 mrg 29 1.1 mrg 30 1.1 mrg 31 1.1 mrg 32 1.1 mrg 33 1.1 mrg This directory contains assembly code for nails-enabled 21264. The code is not 34 1.1 mrg very well optimized. 35 1.1 mrg 36 1.1 mrg For addmul_N, as N grows larger, we could make multiple loads together, then do 37 1.1 mrg about 3.3 i/c. 10 cycles after the last load, we can increase to 4 i/c. This 38 1.1 mrg would surely allow addmul_4 to run at 2 c/l, but the same should be possible 39 1.1 mrg also for addmul_3 and perhaps even addmul_2. 40 1.1 mrg 41 1.1 mrg 42 1.1 mrg current fair best 43 1.1 mrg Routine c/l unroll c/l unroll c/l i/c 44 1.1 mrg mul_1 3.25 2.75 2.75 3.273 45 1.1 mrg addmul_1 4.0 4 3.5 4 14 3.25 3.385 46 1.1 mrg addmul_2 4.0 1 2.5 2 10 2.25 3.333 47 1.1 mrg addmul_3 3.0 1 2.33 2 14 2 3.333 48 1.1 mrg addmul_4 2.5 1 2.125 2 17 2 3.135 49 1.1 mrg 50 1.1 mrg addmul_5 2 1 10 51 1.1 mrg addmul_6 2 1 12 52 1.1 mrg addmul_7 2 1 14 53 1.1 mrg 54 1.1 mrg (The "best" column doesn't account for bookkeeping instructions and 55 1.1 mrg thereby assumes infinite unrolling.) 56 1.1 mrg 57 1.1 mrg Basecase usages: 58 1.1 mrg 59 1.1 mrg 1 addmul_1 60 1.1 mrg 2 addmul_2 61 1.1 mrg 3 addmul_3 62 1.1 mrg 4 addmul_4 63 1.1 mrg 5 addmul_3 + addmul_2 2.3998 64 1.1 mrg 6 addmul_4 + addmul_2 65 1.1 mrg 7 addmul_4 + addmul_3 66
Indexes created Mon Aug 03 00:25:36 UTC 2026