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/* Header file for fp-bit.c. */ |
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/* Copyright (C) 2000-2015 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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. */ |
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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 * BITS_PER_UNIT) |
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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 * BITS_PER_UNIT) |
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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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343 |
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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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386 |
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387 |
/* Prototypes. */ |
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388 |
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389 |
#if defined(L_pack_df) || defined(L_pack_sf) || defined(L_pack_tf) |
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390 |
extern FLO_type pack_d (const fp_number_type *); |
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#endif |
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392 |
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extern void unpack_d (FLO_union_type *, fp_number_type *); |
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394 |
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395 |
#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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399 |
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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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403 |
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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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407 |
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extern int __fpcmp_parts (fp_number_type *, fp_number_type *); |
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409 |
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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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413 |
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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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417 |
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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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421 |
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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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425 |
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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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429 |
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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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433 |
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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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437 |
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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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441 |
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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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445 |
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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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449 |
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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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453 |
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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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457 |
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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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461 |
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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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476 |
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477 |
#ifndef FLOAT |
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478 |
extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype); |
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479 |
#if defined(L_make_df) |
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480 |
extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype); |
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481 |
#endif |
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482 |
#if defined(L_df_to_sf) |
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483 |
extern SFtype df_to_sf (DFtype); |
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484 |
#endif |
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485 |
#if defined(L_df_to_tf) && defined(TMODES) |
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486 |
extern TFtype df_to_tf (DFtype); |
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487 |
#endif |
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488 |
#endif /* ! FLOAT */ |
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489 |
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490 |
#ifdef TMODES |
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491 |
extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype); |
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492 |
extern TFtype __make_tp (fp_class_type, unsigned int, int, UTItype); |
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493 |
#ifdef TFLOAT |
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494 |
#if defined(L_tf_to_sf) |
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495 |
extern SFtype tf_to_sf (TFtype); |
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496 |
#endif |
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497 |
#if defined(L_tf_to_df) |
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498 |
extern DFtype tf_to_df (TFtype); |
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499 |
#endif |
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500 |
#if defined(L_di_to_tf) |
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501 |
extern TFtype di_to_df (DItype); |
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502 |
#endif |
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503 |
#endif /* TFLOAT */ |
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504 |
#endif /* TMODES */ |
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505 |
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506 |
#endif /* ! GCC_FP_BIT_H */ |