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 3 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. If not, see http://www.gnu.org/licenses/. */ 20 21 #define GMP_LIMB_BITS 32 22 #define BYTES_PER_MP_LIMB 4 23 24 25 /* mpn_divexact_1 is faster than mpn_divrem_1 at all sizes. The only time 26 this might not be true currently is for actual 80386 and 80486 chips, 27 where mpn/x86/dive_1.asm might be slower than mpn/x86/divrem_1.asm, but 28 that's not worth worrying about. */ 29 #define DIVEXACT_1_THRESHOLD 0 30 31 /* Only some of the x86s have an mpn_preinv_divrem_1, but we set 32 USE_PREINV_DIVREM_1 so that all callers use it, and then let the 33 __gmpn_cpuvec pointer go to plain mpn_divrem_1 if there's not an actual 34 preinv. */ 35 #define USE_PREINV_DIVREM_1 1 36 37 /* mpn_sqr_basecase is faster than mpn_mul_basecase at all sizes, no need 38 for mpn_sqr to call the latter. */ 39 #define SQR_BASECASE_THRESHOLD 0 40 41 /* Sensible fallbacks for these, when not taken from a cpu-specific 42 gmp-mparam.h. */ 43 #define MUL_TOOM22_THRESHOLD 20 44 #define MUL_TOOM33_THRESHOLD 130 45 #define SQR_TOOM2_THRESHOLD 30 46 #define SQR_TOOM3_THRESHOLD 200 47 48 /* These are values more or less in the middle of what the typical x86 chips 49 come out as. For a fat binary it's necessary to have values for these, 50 since the defaults for MUL_FFT_TABLE and SQR_FFT_TABLE otherwise come out 51 as non-constant array initializers. FIXME: Perhaps these should be done 52 in the cpuvec structure like other thresholds. */ 53 #define MUL_FFT_TABLE { 464, 928, 1920, 3584, 10240, 40960, 0 } 54 #define MUL_FFT_MODF_THRESHOLD 400 55 #define MUL_FFT_THRESHOLD 2000 56 57 #define SQR_FFT_TABLE { 528, 1184, 1920, 4608, 14336, 40960, 0 } 58 #define SQR_FFT_MODF_THRESHOLD 500 59 #define SQR_FFT_THRESHOLD 3000 60