62 lines
2.5 KiB
C
62 lines
2.5 KiB
C
/* Fat binary x86 gmp-mparam.h -- Compiler/machine parameter header file.
|
|
|
|
Copyright 1991, 1993, 1994, 2000, 2001, 2002, 2003 Free Software Foundation,
|
|
Inc.
|
|
|
|
This file is part of the GNU MP Library.
|
|
|
|
The GNU MP Library is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as published by
|
|
the Free Software Foundation; either version 2.1 of the License, or (at your
|
|
option) any later version.
|
|
|
|
The GNU MP Library is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with the GNU MP Library; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#define BITS_PER_MP_LIMB 64
|
|
#define BYTES_PER_MP_LIMB 8
|
|
|
|
|
|
/* mpn_divexact_1 is faster than mpn_divrem_1 at all sizes. The only time
|
|
this might not be true currently is for actual 80386 and 80486 chips,
|
|
where mpn/x86/dive_1.asm might be slower than mpn/x86/divrem_1.asm, but
|
|
that's not worth worrying about. */
|
|
#define DIVEXACT_1_THRESHOLD 0
|
|
|
|
/* Only some of the x86s have an mpn_preinv_divrem_1, but we set
|
|
USE_PREINV_DIVREM_1 so that all callers use it, and then let the
|
|
__gmpn_cpuvec pointer go to plain mpn_divrem_1 if there's not an actual
|
|
preinv. */
|
|
#define USE_PREINV_DIVREM_1 1
|
|
|
|
/* mpn_sqr_basecase is faster than mpn_mul_basecase at all sizes, no need
|
|
for mpn_sqr_n to call the latter. */
|
|
#define SQR_BASECASE_THRESHOLD 0
|
|
|
|
/* Sensible fallbacks for these, when not taken from a cpu-specific
|
|
gmp-mparam.h. */
|
|
#define MUL_KARATSUBA_THRESHOLD 20
|
|
#define MUL_TOOM3_THRESHOLD 130
|
|
#define MUL_TOOM4_THRESHOLD 426
|
|
#define MUL_TOOM7_THRESHOLD 507
|
|
#define SQR_KARATSUBA_THRESHOLD 30
|
|
#define SQR_TOOM3_THRESHOLD 200
|
|
#define SQR_TOOM4_THRESHOLD 662
|
|
#define SQR_TOOM7_THRESHOLD 1300
|
|
|
|
/* These are values more or less in the middle of what the typical x86 chips
|
|
come out as. For a fat binary it's necessary to have values for these,
|
|
since the defaults for MUL_FFT_TABLE and SQR_FFT_TABLE otherwise come out
|
|
as non-constant array initializers. FIXME: Perhaps these should be done
|
|
in the cpuvec structure like other thresholds. */
|
|
#define MUL_FFT_FULL_THRESHOLD 5888
|
|
|
|
#define SQR_FFT_FULL_THRESHOLD 4864
|