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/* Header file for fp-bit.c. */ /* Copyright (C) 2000, 2002, 2003, 2006, 2009 Free Software Foundation, Inc. This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. Under Section 7 of GPL version 3, you are granted additional permissions described in the GCC Runtime Library Exception, version 3.1, as published by the Free Software Foundation. You should have received a copy of the GNU General Public License and a copy of the GCC Runtime Library Exception along with this program; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see <http://www.gnu.org/licenses/>. */ #ifndef GCC_FP_BIT_H #define GCC_FP_BIT_H /* Defining FINE_GRAINED_LIBRARIES allows one to select which routines from this file are compiled via additional -D options. This avoids the need to pull in the entire fp emulation library when only a small number of functions are needed. If FINE_GRAINED_LIBRARIES is not defined, then compile every suitable routine. */ #ifndef FINE_GRAINED_LIBRARIES #define L_pack_df #define L_unpack_df #define L_pack_sf #define L_unpack_sf #define L_addsub_sf #define L_addsub_df #define L_mul_sf #define L_mul_df #define L_div_sf #define L_div_df #define L_fpcmp_parts_sf #define L_fpcmp_parts_df #define L_compare_sf #define L_compare_df #define L_eq_sf #define L_eq_df #define L_ne_sf #define L_ne_df #define L_gt_sf #define L_gt_df #define L_ge_sf #define L_ge_df #define L_lt_sf #define L_lt_df #define L_le_sf #define L_le_df #define L_unord_sf #define L_unord_df #define L_usi_to_sf #define L_usi_to_df #define L_si_to_sf #define L_si_to_df #define L_sf_to_si #define L_df_to_si #define L_f_to_usi #define L_df_to_usi #define L_negate_sf #define L_negate_df #define L_make_sf #define L_make_df #define L_sf_to_df #define L_df_to_sf #ifdef FLOAT #define L_thenan_sf #else #define L_thenan_df #endif #endif /* ! FINE_GRAINED_LIBRARIES */ #if __LDBL_MANT_DIG__ == 113 || __LDBL_MANT_DIG__ == 106 # if defined(TFLOAT) || defined(L_sf_to_tf) || defined(L_df_to_tf) # define TMODES # endif #endif typedef float SFtype __attribute__ ((mode (SF))); typedef float DFtype __attribute__ ((mode (DF))); #ifdef TMODES typedef float TFtype __attribute__ ((mode (TF))); #endif typedef int HItype __attribute__ ((mode (HI))); typedef int SItype __attribute__ ((mode (SI))); typedef int DItype __attribute__ ((mode (DI))); #ifdef TMODES typedef int TItype __attribute__ ((mode (TI))); #endif /* The type of the result of a floating point comparison. This must match `__libgcc_cmp_return__' in GCC for the target. */ #ifndef CMPtype typedef int CMPtype __attribute__ ((mode (__libgcc_cmp_return__))); #endif typedef unsigned int UHItype __attribute__ ((mode (HI))); typedef unsigned int USItype __attribute__ ((mode (SI))); typedef unsigned int UDItype __attribute__ ((mode (DI))); #ifdef TMODES typedef unsigned int UTItype __attribute__ ((mode (TI))); #endif #define MAX_USI_INT (~(USItype)0) #define MAX_SI_INT ((SItype) (MAX_USI_INT >> 1)) #define BITS_PER_SI (4 * BITS_PER_UNIT) #ifdef TMODES #define MAX_UDI_INT (~(UDItype)0) #define MAX_DI_INT ((DItype) (MAX_UDI_INT >> 1)) #define BITS_PER_DI (8 * BITS_PER_UNIT) #endif #ifdef FLOAT_ONLY #define NO_DI_MODE #endif #ifdef TFLOAT # ifndef TMODES # error "TFLOAT requires long double to have 113 bits of mantissa" # endif # define PREFIXFPDP tp # define PREFIXSFDF tf # define NGARDS 10L /* Is this right? */ # define GARDROUND 0x1ff # define GARDMASK 0x3ff # define GARDMSB 0x200 # define FRAC_NBITS 128 # if __LDBL_MANT_DIG__ == 113 /* IEEE quad */ # define EXPBITS 15 # define EXPBIAS 16383 # define EXPMAX (0x7fff) # define QUIET_NAN ((TItype)0x8 << 108) # define FRACHIGH ((TItype)0x8 << 124) # define FRACHIGH2 ((TItype)0xc << 124) # define FRACBITS 112 # endif # if __LDBL_MANT_DIG__ == 106 /* IBM extended (double+double) */ # define EXPBITS 11 # define EXPBIAS 1023 # define EXPMAX (0x7ff) # define QUIET_NAN ((TItype)0x8 << (48 + 64)) # define FRACHIGH ((TItype)0x8 << 124) # define FRACHIGH2 ((TItype)0xc << 124) # define FRACBITS 105 # define HALFFRACBITS 52 # define HALFSHIFT 64 # endif # define pack_d __pack_t # define unpack_d __unpack_t # define __fpcmp_parts __fpcmp_parts_t typedef UTItype fractype; typedef UDItype halffractype; typedef USItype qrtrfractype; #define qrtrfractype qrtrfractype typedef TFtype FLO_type; typedef TItype intfrac; #elif defined FLOAT # define NGARDS 7L # define GARDROUND 0x3f # define GARDMASK 0x7f # define GARDMSB 0x40 # define EXPBITS 8 # define EXPBIAS 127 # define FRACBITS 23 # define EXPMAX (0xff) # define QUIET_NAN 0x100000L # define FRAC_NBITS 32 # define FRACHIGH 0x80000000L # define FRACHIGH2 0xc0000000L # define pack_d __pack_f # define unpack_d __unpack_f # define __fpcmp_parts __fpcmp_parts_f typedef USItype fractype; typedef UHItype halffractype; typedef SFtype FLO_type; typedef SItype intfrac; #else # define PREFIXFPDP dp # define PREFIXSFDF df # define NGARDS 8L # define GARDROUND 0x7f # define GARDMASK 0xff # define GARDMSB 0x80 # define EXPBITS 11 # define EXPBIAS 1023 # define FRACBITS 52 # define EXPMAX (0x7ff) # define QUIET_NAN 0x8000000000000LL # define FRAC_NBITS 64 # define FRACHIGH 0x8000000000000000LL # define FRACHIGH2 0xc000000000000000LL # define pack_d __pack_d # define unpack_d __unpack_d # define __fpcmp_parts __fpcmp_parts_d typedef UDItype fractype; typedef USItype halffractype; typedef DFtype FLO_type; typedef DItype intfrac; #endif /* FLOAT */ #ifdef US_SOFTWARE_GOFAST # ifdef TFLOAT # error "GOFAST TFmode not supported" # elif defined FLOAT # define add fpadd # define sub fpsub # define multiply fpmul # define divide fpdiv # define compare fpcmp # define _unord_f2 __unordsf2 # define usi_to_float __floatunsisf # define si_to_float sitofp # define float_to_si fptosi # define float_to_usi fptoui # define negate __negsf2 # define sf_to_df fptodp # define sf_to_tf __extendsftf2 # else # define add dpadd # define sub dpsub # define multiply dpmul # define divide dpdiv # define compare dpcmp # define _unord_f2 __unorddf2 # define usi_to_float __floatunsidf # define si_to_float litodp # define float_to_si dptoli # define float_to_usi dptoul # define negate __negdf2 # define df_to_sf dptofp # define df_to_tf __extenddftf2 # endif /* FLOAT */ #else # ifdef TFLOAT # define add __addtf3 # define sub __subtf3 # define multiply __multf3 # define divide __divtf3 # define compare __cmptf2 # define _eq_f2 __eqtf2 # define _ne_f2 __netf2 # define _gt_f2 __gttf2 # define _ge_f2 __getf2 # define _lt_f2 __lttf2 # define _le_f2 __letf2 # define _unord_f2 __unordtf2 # define usi_to_float __floatunsitf # define si_to_float __floatsitf # define float_to_si __fixtfsi # define float_to_usi __fixunstfsi # define negate __negtf2 # define tf_to_sf __trunctfsf2 # define tf_to_df __trunctfdf2 # elif defined FLOAT # define add __addsf3 # define sub __subsf3 # define multiply __mulsf3 # define divide __divsf3 # define compare __cmpsf2 # define _eq_f2 __eqsf2 # define _ne_f2 __nesf2 # define _gt_f2 __gtsf2 # define _ge_f2 __gesf2 # define _lt_f2 __ltsf2 # define _le_f2 __lesf2 # define _unord_f2 __unordsf2 # define usi_to_float __floatunsisf # define si_to_float __floatsisf # define float_to_si __fixsfsi # define float_to_usi __fixunssfsi # define negate __negsf2 # define sf_to_df __extendsfdf2 # define sf_to_tf __extendsftf2 # else # define add __adddf3 # define sub __subdf3 # define multiply __muldf3 # define divide __divdf3 # define compare __cmpdf2 # define _eq_f2 __eqdf2 # define _ne_f2 __nedf2 # define _gt_f2 __gtdf2 # define _ge_f2 __gedf2 # define _lt_f2 __ltdf2 # define _le_f2 __ledf2 # define _unord_f2 __unorddf2 # define usi_to_float __floatunsidf # define si_to_float __floatsidf # define float_to_si __fixdfsi # define float_to_usi __fixunsdfsi # define negate __negdf2 # define df_to_sf __truncdfsf2 # define df_to_tf __extenddftf2 # endif /* FLOAT */ #endif /* US_SOFTWARE_GOFAST */ #ifndef INLINE #define INLINE __inline__ #endif /* Preserve the sticky-bit when shifting fractions to the right. */ #define LSHIFT(a, s) { a = (a >> s) | !!(a & (((fractype) 1 << s) - 1)); } /* numeric parameters */ /* F_D_BITOFF is the number of bits offset between the MSB of the mantissa of a float and of a double. Assumes there are only two float types. (double::FRAC_BITS+double::NGARDS-(float::FRAC_BITS-float::NGARDS)) */ #define F_D_BITOFF (52+8-(23+7)) #ifdef TMODES # define F_T_BITOFF (__LDBL_MANT_DIG__-1+10-(23+7)) # define D_T_BITOFF (__LDBL_MANT_DIG__-1+10-(52+8)) #endif #define NORMAL_EXPMIN (-(EXPBIAS)+1) #define IMPLICIT_1 ((fractype)1<<(FRACBITS+NGARDS)) #define IMPLICIT_2 ((fractype)1<<(FRACBITS+1+NGARDS)) /* common types */ typedef enum { CLASS_SNAN, CLASS_QNAN, CLASS_ZERO, CLASS_NUMBER, CLASS_INFINITY } fp_class_type; typedef struct { #ifdef SMALL_MACHINE char class; unsigned char sign; short normal_exp; #else fp_class_type class; unsigned int sign; int normal_exp; #endif union { fractype ll; halffractype l[2]; } fraction; } fp_number_type; typedef union { FLO_type value; fractype value_raw; #ifndef FLOAT # ifdef qrtrfractype qrtrfractype qwords[4]; # else halffractype words[2]; # endif #endif #ifdef FLOAT_BIT_ORDER_MISMATCH struct { fractype fraction:FRACBITS __attribute__ ((packed)); unsigned int exp:EXPBITS __attribute__ ((packed)); unsigned int sign:1 __attribute__ ((packed)); } bits; #endif #ifdef _DEBUG_BITFLOAT struct { unsigned int sign:1 __attribute__ ((packed)); unsigned int exp:EXPBITS __attribute__ ((packed)); fractype fraction:FRACBITS __attribute__ ((packed)); } bits_big_endian; struct { fractype fraction:FRACBITS __attribute__ ((packed)); unsigned int exp:EXPBITS __attribute__ ((packed)); unsigned int sign:1 __attribute__ ((packed)); } bits_little_endian; #endif } FLO_union_type; /* Prototypes. */ #if defined(L_pack_df) || defined(L_pack_sf) || defined(L_pack_tf) extern FLO_type pack_d (const fp_number_type *); #endif extern void unpack_d (FLO_union_type *, fp_number_type *); #if defined(L_addsub_sf) || defined(L_addsub_df) || defined(L_addsub_tf) extern FLO_type add (FLO_type, FLO_type); extern FLO_type sub (FLO_type, FLO_type); #endif #if defined(L_mul_sf) || defined(L_mul_df) || defined(L_mul_tf) extern FLO_type multiply (FLO_type, FLO_type); #endif #if defined(L_div_sf) || defined(L_div_df) || defined(L_div_tf) extern FLO_type divide (FLO_type, FLO_type); #endif extern int __fpcmp_parts (fp_number_type *, fp_number_type *); #if defined(L_compare_sf) || defined(L_compare_df) || defined(L_compare_tf) extern CMPtype compare (FLO_type, FLO_type); #endif #ifndef US_SOFTWARE_GOFAST #if defined(L_eq_sf) || defined(L_eq_df) || defined(L_eq_tf) extern CMPtype _eq_f2 (FLO_type, FLO_type); #endif #if defined(L_ne_sf) || defined(L_ne_df) || defined(L_ne_tf) extern CMPtype _ne_f2 (FLO_type, FLO_type); #endif #if defined(L_gt_sf) || defined(L_gt_df) || defined(L_gt_tf) extern CMPtype _gt_f2 (FLO_type, FLO_type); #endif #if defined(L_ge_sf) || defined(L_ge_df) || defined(L_ge_tf) extern CMPtype _ge_f2 (FLO_type, FLO_type); #endif #if defined(L_lt_sf) || defined(L_lt_df) || defined(L_lt_tf) extern CMPtype _lt_f2 (FLO_type, FLO_type); #endif #if defined(L_le_sf) || defined(L_le_df) || defined(L_le_tf) extern CMPtype _le_f2 (FLO_type, FLO_type); #endif #if defined(L_unord_sf) || defined(L_unord_df) || defined(L_unord_tf) extern CMPtype _unord_f2 (FLO_type, FLO_type); #endif #endif /* ! US_SOFTWARE_GOFAST */ #if defined(L_si_to_sf) || defined(L_si_to_df) || defined(L_si_to_tf) extern FLO_type si_to_float (SItype); #endif #if defined(L_sf_to_si) || defined(L_df_to_si) || defined(L_tf_to_si) extern SItype float_to_si (FLO_type); #endif #if defined(L_sf_to_usi) || defined(L_df_to_usi) || defined(L_tf_to_usi) #if defined(US_SOFTWARE_GOFAST) || defined(L_tf_to_usi) extern USItype float_to_usi (FLO_type); #endif #endif #if defined(L_usi_to_sf) || defined(L_usi_to_df) || defined(L_usi_to_tf) extern FLO_type usi_to_float (USItype); #endif #if defined(L_negate_sf) || defined(L_negate_df) || defined(L_negate_tf) extern FLO_type negate (FLO_type); #endif #ifdef FLOAT #if defined(L_make_sf) extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype); #endif #ifndef FLOAT_ONLY extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype); #if defined(L_sf_to_df) extern DFtype sf_to_df (SFtype); #endif #if defined(L_sf_to_tf) && defined(TMODES) extern TFtype sf_to_tf (SFtype); #endif #endif /* ! FLOAT_ONLY */ #endif /* FLOAT */ #ifndef FLOAT extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype); #if defined(L_make_df) extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype); #endif #if defined(L_df_to_sf) extern SFtype df_to_sf (DFtype); #endif #if defined(L_df_to_tf) && defined(TMODES) extern TFtype df_to_tf (DFtype); #endif #endif /* ! FLOAT */ #ifdef TMODES extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype); extern TFtype __make_tp (fp_class_type, unsigned int, int, UTItype); #ifdef TFLOAT #if defined(L_tf_to_sf) extern SFtype tf_to_sf (TFtype); #endif #if defined(L_tf_to_df) extern DFtype tf_to_df (TFtype); #endif #if defined(L_di_to_tf) extern TFtype di_to_df (DItype); #endif #endif /* TFLOAT */ #endif /* TMODES */ #endif /* ! GCC_FP_BIT_H */
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