1 /* Fat binary x86 gmp-mparam.h -- Compiler/machine parameter header file. 2 3 Copyright 1991, 1993, 1994, 2000, 2001, 2002, 2003 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 the GNU Lesser General Public License as published by 10 the Free Software Foundation; either version 2.1 of the License, or (at your 11 option) any later version. 12 13 The GNU MP Library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16 License for more details. 17 18 You should have received a copy of the GNU Lesser General Public License 19 along with the GNU MP Library; see the file COPYING.LIB. If not, write to 20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 21 MA 02110-1301, USA. */ 22 23 #define BITS_PER_MP_LIMB 32 24 #define BYTES_PER_MP_LIMB 4 25 26 27 /* mpn_divexact_1 is faster than mpn_divrem_1 at all sizes. The only time 28 this might not be true currently is for actual 80386 and 80486 chips, 29 where mpn/x86/dive_1.asm might be slower than mpn/x86/divrem_1.asm, but 30 that's not worth worrying about. */ 31 #define DIVEXACT_1_THRESHOLD 0 32 33 /* Only some of the x86s have an mpn_preinv_divrem_1, but we set 34 USE_PREINV_DIVREM_1 so that all callers use it, and then let the 35 __gmpn_cpuvec pointer go to plain mpn_divrem_1 if there's not an actual 36 preinv. */ 37 #define USE_PREINV_DIVREM_1 1 38 39 /* mpn_sqr_basecase is faster than mpn_mul_basecase at all sizes, no need 40 for mpn_sqr_n to call the latter. */ 41 #define SQR_BASECASE_THRESHOLD 0 42 43 /* Sensible fallbacks for these, when not taken from a cpu-specific 44 gmp-mparam.h. */ 45 #define MUL_KARATSUBA_THRESHOLD 20 46 #define MUL_TOOM3_THRESHOLD 130 47 #define SQR_KARATSUBA_THRESHOLD 30 48 #define SQR_TOOM3_THRESHOLD 200 49 50 /* These are values more or less in the middle of what the typical x86 chips 51 come out as. For a fat binary it's necessary to have values for these, 52 since the defaults for MUL_FFT_TABLE and SQR_FFT_TABLE otherwise come out 53 as non-constant array initializers. FIXME: Perhaps these should be done 54 in the cpuvec structure like other thresholds. */ 55 #define MUL_FFT_FULL_THRESHOLD 2000 56 57 #define SQR_FFT_FULL_THRESHOLD 3000 58 59 /* fft_tuning -- autogenerated by tune-fft */ 60 61 #define FFT_TAB \ 62 { { 4, 3 }, { 3, 2 }, { 2, 1 }, { 2, 1 }, { 1, 0 } } 63 64 #define MULMOD_TAB \ 65 { 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1 } 66 67 #define FFT_N_NUM 15 68 69 #define FFT_MULMOD_2EXPP1_CUTOFF 128 70 71