1 /* Fat binary x86_64 gmp-mparam.h -- Compiler/machine parameter header file.
3 Copyright 1991, 1993, 1994, 2000, 2001, 2002, 2003, 2009 Free Software
6 This file is part of the GNU MP Library.
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.
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.
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/. */
21 #define GMP_LIMB_BITS 64
22 #define BYTES_PER_MP_LIMB 8
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
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
35 #define USE_PREINV_DIVREM_1 1
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
41 /* Sensible fallbacks for these, when not taken from a cpu-specific
43 #define MUL_TOOM22_THRESHOLD 20
44 #define MUL_TOOM33_THRESHOLD 130
45 #define SQR_TOOM2_THRESHOLD 30
46 #define SQR_TOOM3_THRESHOLD 200
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
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