1 /* Header file for fp-bit.c. */
3 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* As a special exception, if you link this library with other files,
23 some of which are compiled with GCC, to produce an executable,
24 this library does not by itself cause the resulting executable
25 to be covered by the GNU General Public License.
26 This exception does not however invalidate any other reasons why
27 the executable file might be covered by the GNU General Public License. */
32 /* Defining FINE_GRAINED_LIBRARIES allows one to select which routines
33 from this file are compiled via additional -D options.
35 This avoids the need to pull in the entire fp emulation library
36 when only a small number of functions are needed.
38 If FINE_GRAINED_LIBRARIES is not defined, then compile every
40 #ifndef FINE_GRAINED_LIBRARIES
51 #define L_fpcmp_parts_sf
52 #define L_fpcmp_parts_df
88 #endif /* ! FINE_GRAINED_LIBRARIES */
90 typedef float SFtype __attribute__ ((mode (SF)));
91 typedef float DFtype __attribute__ ((mode (DF)));
93 typedef int HItype __attribute__ ((mode (HI)));
94 typedef int SItype __attribute__ ((mode (SI)));
95 typedef int DItype __attribute__ ((mode (DI)));
97 /* The type of the result of a fp compare */
99 #define CMPtype SItype
102 typedef unsigned int UHItype __attribute__ ((mode (HI)));
103 typedef unsigned int USItype __attribute__ ((mode (SI)));
104 typedef unsigned int UDItype __attribute__ ((mode (DI)));
106 #define MAX_USI_INT (~(USItype)0)
107 #define MAX_SI_INT ((SItype) (MAX_USI_INT >> 1))
108 #define BITS_PER_SI (4 * BITS_PER_UNIT)
116 # define GARDROUND 0x3f
117 # define GARDMASK 0x7f
118 # define GARDMSB 0x40
122 # define EXPMAX (0xff)
123 # define QUIET_NAN 0x100000L
124 # define FRAC_NBITS 32
125 # define FRACHIGH 0x80000000L
126 # define FRACHIGH2 0xc0000000L
127 # define pack_d __pack_f
128 # define unpack_d __unpack_f
129 # define __fpcmp_parts __fpcmp_parts_f
130 typedef USItype fractype;
131 typedef UHItype halffractype;
132 typedef SFtype FLO_type;
133 typedef SItype intfrac;
136 # define PREFIXFPDP dp
137 # define PREFIXSFDF df
139 # define GARDROUND 0x7f
140 # define GARDMASK 0xff
141 # define GARDMSB 0x80
143 # define EXPBIAS 1023
145 # define EXPMAX (0x7ff)
146 # define QUIET_NAN 0x8000000000000LL
147 # define FRAC_NBITS 64
148 # define FRACHIGH 0x8000000000000000LL
149 # define FRACHIGH2 0xc000000000000000LL
150 # define pack_d __pack_d
151 # define unpack_d __unpack_d
152 # define __fpcmp_parts __fpcmp_parts_d
153 typedef UDItype fractype;
154 typedef USItype halffractype;
155 typedef DFtype FLO_type;
156 typedef DItype intfrac;
159 #ifdef US_SOFTWARE_GOFAST
163 # define multiply fpmul
164 # define divide fpdiv
165 # define compare fpcmp
166 # define _unord_f2 __unordsf2
167 # define usi_to_float __floatunsisf
168 # define si_to_float sitofp
169 # define float_to_si fptosi
170 # define float_to_usi fptoui
171 # define negate __negsf2
172 # define sf_to_df fptodp
173 # define dptofp dptofp
177 # define multiply dpmul
178 # define divide dpdiv
179 # define compare dpcmp
180 # define _unord_f2 __unorddf2
181 # define usi_to_float __floatunsidf
182 # define si_to_float litodp
183 # define float_to_si dptoli
184 # define float_to_usi dptoul
185 # define negate __negdf2
186 # define df_to_sf dptofp
190 # define add __addsf3
191 # define sub __subsf3
192 # define multiply __mulsf3
193 # define divide __divsf3
194 # define compare __cmpsf2
195 # define _eq_f2 __eqsf2
196 # define _ne_f2 __nesf2
197 # define _gt_f2 __gtsf2
198 # define _ge_f2 __gesf2
199 # define _lt_f2 __ltsf2
200 # define _le_f2 __lesf2
201 # define _unord_f2 __unordsf2
202 # define usi_to_float __floatunsisf
203 # define si_to_float __floatsisf
204 # define float_to_si __fixsfsi
205 # define float_to_usi __fixunssfsi
206 # define negate __negsf2
207 # define sf_to_df __extendsfdf2
209 # define add __adddf3
210 # define sub __subdf3
211 # define multiply __muldf3
212 # define divide __divdf3
213 # define compare __cmpdf2
214 # define _eq_f2 __eqdf2
215 # define _ne_f2 __nedf2
216 # define _gt_f2 __gtdf2
217 # define _ge_f2 __gedf2
218 # define _lt_f2 __ltdf2
219 # define _le_f2 __ledf2
220 # define _unord_f2 __unorddf2
221 # define usi_to_float __floatunsidf
222 # define si_to_float __floatsidf
223 # define float_to_si __fixdfsi
224 # define float_to_usi __fixunsdfsi
225 # define negate __negdf2
226 # define df_to_sf __truncdfsf2
228 #endif /* US_SOFTWARE_GOFAST */
231 #define INLINE __inline__
234 /* Preserve the sticky-bit when shifting fractions to the right. */
235 #define LSHIFT(a) { a = (a & 1) | (a >> 1); }
237 /* numeric parameters */
238 /* F_D_BITOFF is the number of bits offset between the MSB of the mantissa
239 of a float and of a double. Assumes there are only two float types.
240 (double::FRAC_BITS+double::NGARDS-(float::FRAC_BITS-float::NGARDS))
242 #define F_D_BITOFF (52+8-(23+7))
245 #define NORMAL_EXPMIN (-(EXPBIAS)+1)
246 #define IMPLICIT_1 (1LL<<(FRACBITS+NGARDS))
247 #define IMPLICIT_2 (1LL<<(FRACBITS+1+NGARDS))
285 halffractype words[2];
288 #ifdef FLOAT_BIT_ORDER_MISMATCH
291 fractype fraction:FRACBITS __attribute__ ((packed));
292 unsigned int exp:EXPBITS __attribute__ ((packed));
293 unsigned int sign:1 __attribute__ ((packed));
298 #ifdef _DEBUG_BITFLOAT
301 unsigned int sign:1 __attribute__ ((packed));
302 unsigned int exp:EXPBITS __attribute__ ((packed));
303 fractype fraction:FRACBITS __attribute__ ((packed));
309 fractype fraction:FRACBITS __attribute__ ((packed));
310 unsigned int exp:EXPBITS __attribute__ ((packed));
311 unsigned int sign:1 __attribute__ ((packed));
320 #if defined(L_pack_df) || defined(L_pack_sf)
321 extern FLO_type pack_d (fp_number_type *);
324 extern void unpack_d (FLO_union_type *, fp_number_type *);
326 #if defined(L_addsub_sf) || defined(L_addsub_df)
327 extern FLO_type add (FLO_type, FLO_type);
328 extern FLO_type sub (FLO_type, FLO_type);
331 #if defined(L_mul_sf) || defined(L_mul_df)
332 extern FLO_type multiply (FLO_type, FLO_type);
335 #if defined(L_div_sf) || defined(L_div_df)
336 extern FLO_type divide (FLO_type, FLO_type);
339 extern int __fpcmp_parts (fp_number_type *, fp_number_type *);
341 #if defined(L_compare_sf) || defined(L_compare_df)
342 extern CMPtype compare (FLO_type, FLO_type);
345 #ifndef US_SOFTWARE_GOFAST
347 #if defined(L_eq_sf) || defined(L_eq_df)
348 extern CMPtype _eq_f2 (FLO_type, FLO_type);
351 #if defined(L_ne_sf) || defined(L_ne_df)
352 extern CMPtype _ne_f2 (FLO_type, FLO_type);
355 #if defined(L_gt_sf) || defined(L_gt_df)
356 extern CMPtype _gt_f2 (FLO_type, FLO_type);
359 #if defined(L_ge_sf) || defined(L_ge_df)
360 extern CMPtype _ge_f2 (FLO_type, FLO_type);
363 #if defined(L_lt_sf) || defined(L_lt_df)
364 extern CMPtype _lt_f2 (FLO_type, FLO_type);
367 #if defined(L_le_sf) || defined(L_le_df)
368 extern CMPtype _le_f2 (FLO_type, FLO_type);
371 #if defined(L_unord_sf) || defined(L_unord_df)
372 extern CMPtype _unord_f2 (FLO_type, FLO_type);
375 #endif /* ! US_SOFTWARE_GOFAST */
377 #if defined(L_si_to_sf) || defined(L_si_to_df)
378 extern FLO_type si_to_float (SItype);
381 #if defined(L_sf_to_si) || defined(L_df_to_si)
382 extern SItype float_to_si (FLO_type);
385 #if defined(L_sf_to_usi) || defined(L_df_to_usi)
386 #ifdef US_SOFTWARE_GOFAST
387 extern USItype float_to_usi (FLO_type);
391 #if defined(L_usi_to_sf) || defined(L_usi_to_df)
392 extern FLO_type usi_to_float (USItype);
395 #if defined(L_negate_sf) || defined(L_negate_df)
396 extern FLO_type negate (FLO_type);
400 #if defined(L_make_sf)
401 extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype);
404 extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype);
405 #if defined(L_sf_to_df)
406 extern DFtype sf_to_df (SFtype);
408 #endif /* ! FLOAT_ONLY */
412 extern SFtype __make_fp (fp_class_type, unsigned int, int, USItype);
413 #if defined(L_make_df)
414 extern DFtype __make_dp (fp_class_type, unsigned int, int, UDItype);
416 #if defined(L_df_to_sf)
417 extern SFtype df_to_sf (DFtype);
421 #endif /* ! GCC_FP_BIT_H */