1/* Fat binary x86 gmp-mparam.h -- Compiler/machine parameter header file.
2
3Copyright 1991, 1993, 1994, 2000-2003, 2011 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it 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
14or
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
20or both in parallel, as here.
21
22The GNU MP Library is distributed in the hope that it will be useful, but
23WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
24or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
25for more details.
26
27You should have received copies of the GNU General Public License and the
28GNU Lesser General Public License along with the GNU MP Library.  If not,
29see 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