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