1 /* Fat binary x86_64 gmp-mparam.h -- Compiler/machine parameter header file. 2 3 Copyright 1991, 1993, 1994, 2000-2003, 2009, 2011 Free Software Foundation, 4 Inc. 5 6 This file is part of the GNU MP Library. 7 8 The GNU MP Library is free software; you can redistribute it and/or modify 9 it under the terms of either: 10 11 * the GNU Lesser General Public License as published by the Free 12 Software Foundation; either version 3 of the License, or (at your 13 option) any later version. 14 15 or 16 17 * the GNU General Public License as published by the Free Software 18 Foundation; either version 2 of the License, or (at your option) any 19 later version. 20 21 or both in parallel, as here. 22 23 The GNU MP Library is distributed in the hope that it will be useful, but 24 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 25 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 26 for more details. 27 28 You should have received copies of the GNU General Public License and the 29 GNU Lesser General Public License along with the GNU MP Library. If not, 30 see https://www.gnu.org/licenses/. */ 31 32 #define GMP_LIMB_BITS 64 33 #define GMP_LIMB_BYTES 8 34 35 36 /* mpn_divexact_1 is faster than mpn_divrem_1 at all sizes. The only time 37 this might not be true currently is for actual 80386 and 80486 chips, 38 where mpn/x86/dive_1.asm might be slower than mpn/x86/divrem_1.asm, but 39 that's not worth worrying about. */ 40 #define DIVEXACT_1_THRESHOLD 0 41 42 /* Only some of the x86s have an mpn_preinv_divrem_1, but we set 43 USE_PREINV_DIVREM_1 so that all callers use it, and then let the 44 __gmpn_cpuvec pointer go to plain mpn_divrem_1 if there's not an actual 45 preinv. */ 46 #define USE_PREINV_DIVREM_1 1 47 48 #define BMOD_1_TO_MOD_1_THRESHOLD 20 49 50 /* mpn_sqr_basecase is faster than mpn_mul_basecase at all sizes, no need 51 for mpn_sqr to call the latter. */ 52 #define SQR_BASECASE_THRESHOLD 0 53 54 /* Sensible fallbacks for these, when not taken from a cpu-specific 55 gmp-mparam.h. */ 56 #define MUL_TOOM22_THRESHOLD 20 57 #define MUL_TOOM33_THRESHOLD 130 58 #define SQR_TOOM2_THRESHOLD 30 59 #define SQR_TOOM3_THRESHOLD 200 60 61 /* These are values more or less in the middle of what the typical x86 chips 62 come out as. For a fat binary it's necessary to have values for these, 63 since the defaults for MUL_FFT_TABLE and SQR_FFT_TABLE otherwise come out 64 as non-constant array initializers. FIXME: Perhaps these should be done 65 in the cpuvec structure like other thresholds. */ 66 #define MUL_FFT_TABLE { 464, 928, 1920, 3584, 10240, 40960, 0 } 67 #define MUL_FFT_MODF_THRESHOLD 400 68 #define MUL_FFT_THRESHOLD 2000 69 70 #define SQR_FFT_TABLE { 528, 1184, 1920, 4608, 14336, 40960, 0 } 71 #define SQR_FFT_MODF_THRESHOLD 500 72 #define SQR_FFT_THRESHOLD 3000 73