420 lines
10 KiB
C
420 lines
10 KiB
C
/* Header file for fp-bit.c. */
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/* Copyright (C) 2000
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Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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#ifndef GCC_FP_BIT_H
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#define GCC_FP_BIT_H
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/* Defining FINE_GRAINED_LIBRARIES allows one to select which routines
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from this file are compiled via additional -D options.
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This avoids the need to pull in the entire fp emulation library
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when only a small number of functions are needed.
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If FINE_GRAINED_LIBRARIES is not defined, then compile every
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suitable routine. */
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#ifndef FINE_GRAINED_LIBRARIES
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#define L_pack_df
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#define L_unpack_df
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#define L_pack_sf
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#define L_unpack_sf
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#define L_addsub_sf
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#define L_addsub_df
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#define L_mul_sf
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#define L_mul_df
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#define L_div_sf
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#define L_div_df
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#define L_fpcmp_parts_sf
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#define L_fpcmp_parts_df
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#define L_compare_sf
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#define L_compare_df
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#define L_eq_sf
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#define L_eq_df
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#define L_ne_sf
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#define L_ne_df
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#define L_gt_sf
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#define L_gt_df
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#define L_ge_sf
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#define L_ge_df
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#define L_lt_sf
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#define L_lt_df
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#define L_le_sf
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#define L_le_df
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#define L_unord_sf
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#define L_unord_df
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#define L_usi_to_sf
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#define L_usi_to_df
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#define L_si_to_sf
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#define L_si_to_df
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#define L_sf_to_si
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#define L_df_to_si
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#define L_f_to_usi
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#define L_df_to_usi
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#define L_negate_sf
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#define L_negate_df
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#define L_make_sf
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#define L_make_df
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#define L_sf_to_df
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#define L_df_to_sf
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#ifdef FLOAT
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#define L_thenan_sf
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#else
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#define L_thenan_df
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#endif
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#endif /* ! FINE_GRAINED_LIBRARIES */
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typedef float SFtype __attribute__ ((mode (SF)));
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typedef float DFtype __attribute__ ((mode (DF)));
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typedef int HItype __attribute__ ((mode (HI)));
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typedef int SItype __attribute__ ((mode (SI)));
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typedef int DItype __attribute__ ((mode (DI)));
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/* The type of the result of a fp compare */
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#ifndef CMPtype
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#define CMPtype SItype
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#endif
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typedef unsigned int UHItype __attribute__ ((mode (HI)));
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typedef unsigned int USItype __attribute__ ((mode (SI)));
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typedef unsigned int UDItype __attribute__ ((mode (DI)));
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#define MAX_USI_INT (~(USItype)0)
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#define MAX_SI_INT ((SItype) (MAX_USI_INT >> 1))
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#define BITS_PER_SI (4 * BITS_PER_UNIT)
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#ifdef FLOAT_ONLY
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#define NO_DI_MODE
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#endif
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#ifdef FLOAT
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# define NGARDS 7L
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# define GARDROUND 0x3f
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# define GARDMASK 0x7f
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# define GARDMSB 0x40
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# define EXPBITS 8
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# define EXPBIAS 127
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# define FRACBITS 23
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# define EXPMAX (0xff)
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# define QUIET_NAN 0x100000L
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# define FRAC_NBITS 32
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# define FRACHIGH 0x80000000L
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# define FRACHIGH2 0xc0000000L
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# define pack_d __pack_f
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# define unpack_d __unpack_f
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# define __fpcmp_parts __fpcmp_parts_f
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typedef USItype fractype;
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typedef UHItype halffractype;
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typedef SFtype FLO_type;
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typedef SItype intfrac;
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#else
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# define PREFIXFPDP dp
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# define PREFIXSFDF df
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# define NGARDS 8L
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# define GARDROUND 0x7f
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# define GARDMASK 0xff
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# define GARDMSB 0x80
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# define EXPBITS 11
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# define EXPBIAS 1023
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# define FRACBITS 52
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# define EXPMAX (0x7ff)
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# define QUIET_NAN 0x8000000000000LL
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# define FRAC_NBITS 64
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# define FRACHIGH 0x8000000000000000LL
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# define FRACHIGH2 0xc000000000000000LL
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# define pack_d __pack_d
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# define unpack_d __unpack_d
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# define __fpcmp_parts __fpcmp_parts_d
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typedef UDItype fractype;
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typedef USItype halffractype;
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typedef DFtype FLO_type;
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typedef DItype intfrac;
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#endif /* FLOAT */
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#ifdef US_SOFTWARE_GOFAST
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# ifdef FLOAT
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# define add fpadd
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# define sub fpsub
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# define multiply fpmul
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# define divide fpdiv
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# define compare fpcmp
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# define usi_to_float __floatunsisf
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# define si_to_float sitofp
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# define float_to_si fptosi
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# define float_to_usi fptoui
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# define negate __negsf2
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# define sf_to_df fptodp
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# define dptofp dptofp
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#else
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# define add dpadd
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# define sub dpsub
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# define multiply dpmul
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# define divide dpdiv
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# define compare dpcmp
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# define usi_to_float __floatunsidf
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# define si_to_float litodp
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# define float_to_si dptoli
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# define float_to_usi dptoul
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# define negate __negdf2
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# define df_to_sf dptofp
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# endif /* FLOAT */
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#else
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# ifdef FLOAT
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# define add __addsf3
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# define sub __subsf3
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# define multiply __mulsf3
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# define divide __divsf3
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# define compare __cmpsf2
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# define _eq_f2 __eqsf2
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# define _ne_f2 __nesf2
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# define _gt_f2 __gtsf2
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# define _ge_f2 __gesf2
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# define _lt_f2 __ltsf2
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# define _le_f2 __lesf2
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# define _unord_f2 __unordsf2
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# define usi_to_float __floatunsisf
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# define si_to_float __floatsisf
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# define float_to_si __fixsfsi
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# define float_to_usi __fixunssfsi
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# define negate __negsf2
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# define sf_to_df __extendsfdf2
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#else
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# define add __adddf3
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# define sub __subdf3
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# define multiply __muldf3
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# define divide __divdf3
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# define compare __cmpdf2
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# define _eq_f2 __eqdf2
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# define _ne_f2 __nedf2
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# define _gt_f2 __gtdf2
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# define _ge_f2 __gedf2
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# define _lt_f2 __ltdf2
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# define _le_f2 __ledf2
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# define _unord_f2 __unorddf2
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# define usi_to_float __floatunsidf
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# define si_to_float __floatsidf
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# define float_to_si __fixdfsi
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# define float_to_usi __fixunsdfsi
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# define negate __negdf2
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# define df_to_sf __truncdfsf2
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# endif /* FLOAT */
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#endif /* US_SOFTWARE_GOFAST */
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#ifndef INLINE
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#define INLINE __inline__
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#endif
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/* Preserve the sticky-bit when shifting fractions to the right. */
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#define LSHIFT(a) { a = (a & 1) | (a >> 1); }
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/* numeric parameters */
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/* F_D_BITOFF is the number of bits offset between the MSB of the mantissa
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of a float and of a double. Assumes there are only two float types.
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(double::FRAC_BITS+double::NGARDS-(float::FRAC_BITS-float::NGARDS))
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*/
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#define F_D_BITOFF (52+8-(23+7))
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#define NORMAL_EXPMIN (-(EXPBIAS)+1)
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#define IMPLICIT_1 (1LL<<(FRACBITS+NGARDS))
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#define IMPLICIT_2 (1LL<<(FRACBITS+1+NGARDS))
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/* common types */
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typedef enum
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{
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CLASS_SNAN,
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CLASS_QNAN,
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CLASS_ZERO,
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CLASS_NUMBER,
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CLASS_INFINITY
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} fp_class_type;
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typedef struct
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{
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#ifdef SMALL_MACHINE
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char class;
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unsigned char sign;
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short normal_exp;
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#else
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fp_class_type class;
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unsigned int sign;
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int normal_exp;
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#endif
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union
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{
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fractype ll;
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halffractype l[2];
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} fraction;
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} fp_number_type;
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typedef union
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{
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FLO_type value;
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fractype value_raw;
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#ifndef FLOAT
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halffractype words[2];
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#endif
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#ifdef FLOAT_BIT_ORDER_MISMATCH
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struct
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{
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fractype fraction:FRACBITS __attribute__ ((packed));
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unsigned int exp:EXPBITS __attribute__ ((packed));
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unsigned int sign:1 __attribute__ ((packed));
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}
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bits;
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#endif
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#ifdef _DEBUG_BITFLOAT
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struct
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{
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unsigned int sign:1 __attribute__ ((packed));
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unsigned int exp:EXPBITS __attribute__ ((packed));
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fractype fraction:FRACBITS __attribute__ ((packed));
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}
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bits_big_endian;
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struct
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{
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fractype fraction:FRACBITS __attribute__ ((packed));
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unsigned int exp:EXPBITS __attribute__ ((packed));
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unsigned int sign:1 __attribute__ ((packed));
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}
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bits_little_endian;
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#endif
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}
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FLO_union_type;
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/* Prototypes */
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#if defined(L_pack_df) || defined(L_pack_sf)
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extern FLO_type pack_d (fp_number_type *);
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#endif
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extern void unpack_d (FLO_union_type *, fp_number_type *);
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#if defined(L_addsub_sf) || defined(L_addsub_df)
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extern FLO_type add (FLO_type, FLO_type);
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extern FLO_type sub (FLO_type, FLO_type);
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#endif
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#if defined(L_mul_sf) || defined(L_mul_df)
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extern FLO_type multiply (FLO_type, FLO_type);
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#endif
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#if defined(L_div_sf) || defined(L_div_df)
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extern FLO_type divide (FLO_type, FLO_type);
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#endif
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extern int __fpcmp_parts (fp_number_type *, fp_number_type *);
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#if defined(L_compare_sf) || defined(L_compare_df)
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extern CMPtype compare (FLO_type, FLO_type);
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#endif
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#ifndef US_SOFTWARE_GOFAST
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#if defined(L_eq_sf) || defined(L_eq_df)
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extern CMPtype _eq_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_ne_sf) || defined(L_ne_df)
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extern CMPtype _ne_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_gt_sf) || defined(L_gt_df)
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extern CMPtype _gt_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_ge_sf) || defined(L_ge_df)
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extern CMPtype _ge_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_lt_sf) || defined(L_lt_df)
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extern CMPtype _lt_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_le_sf) || defined(L_le_df)
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extern CMPtype _le_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_unord_sf) || defined(L_unord_df)
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extern CMPtype _unord_f2 (FLO_type, FLO_type);
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#endif
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#endif /* ! US_SOFTWARE_GOFAST */
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#if defined(L_si_to_sf) || defined(L_si_to_df)
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extern FLO_type si_to_float (SItype);
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#endif
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#if defined(L_sf_to_si) || defined(L_df_to_si)
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extern SItype float_to_si (FLO_type);
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#endif
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#if defined(L_sf_to_usi) || defined(L_df_to_usi)
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#ifdef US_SOFTWARE_GOFAST
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extern USItype float_to_usi (FLO_type);
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#endif
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#endif
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#if defined(L_usi_to_sf) || defined(L_usi_to_df)
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extern FLO_type usi_to_float (USItype);
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#endif
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#if defined(L_negate_sf) || defined(L_negate_df)
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extern FLO_type negate (FLO_type);
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#endif
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#ifdef FLOAT
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#if defined(L_make_sf)
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extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype);
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#endif
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#ifndef FLOAT_ONLY
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extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype);
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#if defined(L_sf_to_df)
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extern DFtype sf_to_df (SFtype);
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#endif
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#endif /* ! FLOAT_ONLY */
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#endif /* FLOAT */
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#ifndef FLOAT
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extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype);
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#if defined(L_make_df)
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extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype);
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#endif
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#if defined(L_df_to_sf)
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extern SFtype df_to_sf (DFtype);
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#endif
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#endif /* ! FLOAT */
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#endif /* ! GCC_FP_BIT_H */
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