62 lines
2.6 KiB
C
62 lines
2.6 KiB
C
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/* Fat binary x86 gmp-mparam.h -- Compiler/machine parameter header file.
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Copyright 1991, 1993, 1994, 2000, 2001, 2002, 2003 Free Software Foundation,
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Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#define BITS_PER_MP_LIMB 32
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#define BYTES_PER_MP_LIMB 4
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/* mpn_divexact_1 is faster than mpn_divrem_1 at all sizes. The only time
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this might not be true currently is for actual 80386 and 80486 chips,
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where mpn/x86/dive_1.asm might be slower than mpn/x86/divrem_1.asm, but
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that's not worth worrying about. */
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#define DIVEXACT_1_THRESHOLD 0
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/* Only some of the x86s have an mpn_preinv_divrem_1, but we set
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USE_PREINV_DIVREM_1 so that all callers use it, and then let the
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__gmpn_cpuvec pointer go to plain mpn_divrem_1 if there's not an actual
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preinv. */
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#define USE_PREINV_DIVREM_1 1
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/* mpn_sqr_basecase is faster than mpn_mul_basecase at all sizes, no need
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for mpn_sqr_n to call the latter. */
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#define SQR_BASECASE_THRESHOLD 0
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/* Sensible fallbacks for these, when not taken from a cpu-specific
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gmp-mparam.h. */
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#define MUL_KARATSUBA_THRESHOLD 20
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#define MUL_TOOM3_THRESHOLD 130
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#define SQR_KARATSUBA_THRESHOLD 30
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#define SQR_TOOM3_THRESHOLD 200
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/* These are values more or less in the middle of what the typical x86 chips
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come out as. For a fat binary it's necessary to have values for these,
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since the defaults for MUL_FFT_TABLE and SQR_FFT_TABLE otherwise come out
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as non-constant array initializers. FIXME: Perhaps these should be done
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in the cpuvec structure like other thresholds. */
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#define MUL_FFT_TABLE { 464, 928, 1920, 3584, 10240, 40960, 0 }
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#define MUL_FFT_MODF_THRESHOLD 400
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#define MUL_FFT_THRESHOLD 2000
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#define SQR_FFT_TABLE { 528, 1184, 1920, 4608, 14336, 40960, 0 }
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#define SQR_FFT_MODF_THRESHOLD 500
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#define SQR_FFT_THRESHOLD 3000
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