507 lines
13 KiB
C
507 lines
13 KiB
C
/* Header file for fp-bit.c. */
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/* Copyright (C) 2000-2017 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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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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#if __LDBL_MANT_DIG__ == 113 || __LDBL_MANT_DIG__ == 106
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# if defined(TFLOAT) || defined(L_sf_to_tf) || defined(L_df_to_tf)
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# define TMODES
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# endif
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#endif
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typedef float SFtype __attribute__ ((mode (SF)));
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typedef float DFtype __attribute__ ((mode (DF)));
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#ifdef TMODES
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typedef float TFtype __attribute__ ((mode (TF)));
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#endif
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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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#ifdef TMODES
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typedef int TItype __attribute__ ((mode (TI)));
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#endif
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/* The type of the result of a floating point comparison. This must
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match `__libgcc_cmp_return__' in GCC for the target. */
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#ifndef CMPtype
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typedef int CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
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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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#ifdef TMODES
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typedef unsigned int UTItype __attribute__ ((mode (TI)));
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#endif
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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 * __CHAR_BIT__)
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#ifdef TMODES
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#define MAX_UDI_INT (~(UDItype)0)
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#define MAX_DI_INT ((DItype) (MAX_UDI_INT >> 1))
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#define BITS_PER_DI (8 * __CHAR_BIT__)
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#endif
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#ifdef FLOAT_ONLY
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#define NO_DI_MODE
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#endif
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define FLOAT_BIT_ORDER_MISMATCH
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#endif
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#if __BYTE_ORDER__ != __FLOAT_WORD_ORDER__
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#define FLOAT_WORD_ORDER_MISMATCH
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#endif
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#ifdef TFLOAT
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# ifndef TMODES
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# error "TFLOAT requires long double to have 113 bits of mantissa"
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# endif
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# define PREFIXFPDP tp
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# define PREFIXSFDF tf
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# define NGARDS 10L /* Is this right? */
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# define GARDROUND 0x1ff
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# define GARDMASK 0x3ff
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# define GARDMSB 0x200
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# define FRAC_NBITS 128
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# if __LDBL_MANT_DIG__ == 113 /* IEEE quad */
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# define EXPBITS 15
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# define EXPBIAS 16383
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# define EXPMAX (0x7fff)
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# define QUIET_NAN ((TItype)0x8 << 108)
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# define FRACHIGH ((TItype)0x8 << 124)
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# define FRACHIGH2 ((TItype)0xc << 124)
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# define FRACBITS 112
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# endif
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# if __LDBL_MANT_DIG__ == 106 /* IBM extended (double+double) */
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# define EXPBITS 11
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# define EXPBIAS 1023
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# define EXPMAX (0x7ff)
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# define QUIET_NAN ((TItype)0x8 << (48 + 64))
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# define FRACHIGH ((TItype)0x8 << 124)
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# define FRACHIGH2 ((TItype)0xc << 124)
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# define FRACBITS 105
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# define HALFFRACBITS 52
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# define HALFSHIFT 64
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# endif
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# define pack_d __pack_t
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# define unpack_d __unpack_t
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# define __fpcmp_parts __fpcmp_parts_t
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typedef UTItype fractype;
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typedef UDItype halffractype;
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typedef USItype qrtrfractype;
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#define qrtrfractype qrtrfractype
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typedef TFtype FLO_type;
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typedef TItype intfrac;
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#elif defined 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 0x400000L
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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 TFLOAT
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# define add __addtf3
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# define sub __subtf3
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# define multiply __multf3
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# define divide __divtf3
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# define compare __cmptf2
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# define _eq_f2 __eqtf2
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# define _ne_f2 __netf2
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# define _gt_f2 __gttf2
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# define _ge_f2 __getf2
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# define _lt_f2 __lttf2
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# define _le_f2 __letf2
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# define _unord_f2 __unordtf2
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# define usi_to_float __floatunsitf
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# define si_to_float __floatsitf
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# define float_to_si __fixtfsi
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# define float_to_usi __fixunstfsi
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# define negate __negtf2
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# define tf_to_sf __trunctfsf2
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# define tf_to_df __trunctfdf2
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#elif defined 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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# define sf_to_tf __extendsftf2
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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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# define df_to_tf __extenddftf2
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#endif /* FLOAT */
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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, s) { a = (a >> s) | !!(a & (((fractype) 1 << s) - 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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#ifdef TMODES
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# define F_T_BITOFF (__LDBL_MANT_DIG__-1+10-(23+7))
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# define D_T_BITOFF (__LDBL_MANT_DIG__-1+10-(52+8))
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#endif
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#define NORMAL_EXPMIN (-(EXPBIAS)+1)
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#define IMPLICIT_1 ((fractype)1<<(FRACBITS+NGARDS))
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#define IMPLICIT_2 ((fractype)1<<(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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# ifdef qrtrfractype
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qrtrfractype qwords[4];
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# else
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halffractype words[2];
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# endif
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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) || defined(L_pack_tf)
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extern FLO_type pack_d (const 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) || defined(L_addsub_tf)
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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) || defined(L_mul_tf)
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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) || defined(L_div_tf)
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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) || defined(L_compare_tf)
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extern CMPtype compare (FLO_type, FLO_type);
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#endif
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#if defined(L_eq_sf) || defined(L_eq_df) || defined(L_eq_tf)
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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) || defined(L_ne_tf)
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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) || defined(L_gt_tf)
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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) || defined(L_ge_tf)
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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) || defined(L_lt_tf)
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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) || defined(L_le_tf)
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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) || defined(L_unord_tf)
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extern CMPtype _unord_f2 (FLO_type, FLO_type);
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#endif
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#if defined(L_si_to_sf) || defined(L_si_to_df) || defined(L_si_to_tf)
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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) || defined(L_tf_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_tf_to_usi)
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extern USItype float_to_usi (FLO_type);
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#endif
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#if defined(L_usi_to_sf) || defined(L_usi_to_df) || defined(L_usi_to_tf)
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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) || defined(L_negate_tf)
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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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#if defined(L_sf_to_tf) && defined(TMODES)
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extern TFtype sf_to_tf (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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#if defined(L_df_to_tf) && defined(TMODES)
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extern TFtype df_to_tf (DFtype);
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#endif
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#endif /* ! FLOAT */
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#ifdef TMODES
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extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype);
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extern TFtype __make_tp (fp_class_type, unsigned int, int, UTItype);
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#ifdef TFLOAT
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#if defined(L_tf_to_sf)
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extern SFtype tf_to_sf (TFtype);
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#endif
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#if defined(L_tf_to_df)
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extern DFtype tf_to_df (TFtype);
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#endif
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#if defined(L_di_to_tf)
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extern TFtype di_to_df (DItype);
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#endif
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#endif /* TFLOAT */
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#endif /* TMODES */
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#endif /* ! GCC_FP_BIT_H */
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