1
2/*============================================================================
3
4This C header file is part of the SoftFloat IEEE Floating-Point Arithmetic
5Package, Release 3e, by John R. Hauser.
6
7Copyright 2011, 2012, 2013, 2014, 2015, 2016, 2017 The Regents of the
8University of California.  All rights reserved.
9
10Redistribution and use in source and binary forms, with or without
11modification, are permitted provided that the following conditions are met:
12
13 1. Redistributions of source code must retain the above copyright notice,
14    this list of conditions, and the following disclaimer.
15
16 2. Redistributions in binary form must reproduce the above copyright notice,
17    this list of conditions, and the following disclaimer in the documentation
18    and/or other materials provided with the distribution.
19
20 3. Neither the name of the University nor the names of its contributors may
21    be used to endorse or promote products derived from this software without
22    specific prior written permission.
23
24THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
25EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
26WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
27DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
28DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
31ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34
35=============================================================================*/
36
37#ifndef internals_h
38#define internals_h 1
39
40#include <stdbool.h>
41#include <stdint.h>
42#include "primitives.h"
43#include "softfloat_types.h"
44
45union ui16_f16 { uint16_t ui; float16_t f; };
46union ui32_f32 { uint32_t ui; float32_t f; };
47union ui64_f64 { uint64_t ui; float64_t f; };
48
49#ifdef SOFTFLOAT_FAST_INT64
50union extF80M_extF80 { struct extFloat80M fM; extFloat80_t f; };
51union ui128_f128 { struct uint128 ui; float128_t f; };
52#endif
53
54enum {
55    softfloat_mulAdd_subC    = 1,
56    softfloat_mulAdd_subProd = 2
57};
58
59/*----------------------------------------------------------------------------
60*----------------------------------------------------------------------------*/
61uint_fast32_t softfloat_roundToUI32( bool, uint_fast64_t, uint_fast8_t, bool );
62
63#ifdef SOFTFLOAT_FAST_INT64
64uint_fast64_t
65 softfloat_roundToUI64(
66     bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool );
67#else
68uint_fast64_t softfloat_roundMToUI64( bool, uint32_t *, uint_fast8_t, bool );
69#endif
70
71int_fast32_t softfloat_roundToI32( bool, uint_fast64_t, uint_fast8_t, bool );
72
73#ifdef SOFTFLOAT_FAST_INT64
74int_fast64_t
75 softfloat_roundToI64(
76     bool, uint_fast64_t, uint_fast64_t, uint_fast8_t, bool );
77#else
78int_fast64_t softfloat_roundMToI64( bool, uint32_t *, uint_fast8_t, bool );
79#endif
80
81/*----------------------------------------------------------------------------
82*----------------------------------------------------------------------------*/
83#define signF16UI( a ) ((bool) ((uint16_t) (a)>>15))
84#define expF16UI( a ) ((int_fast8_t) ((a)>>10) & 0x1F)
85#define fracF16UI( a ) ((a) & 0x03FF)
86#define packToF16UI( sign, exp, sig ) (((uint16_t) (sign)<<15) + ((uint16_t) (exp)<<10) + (sig))
87
88#define isNaNF16UI( a ) (((~(a) & 0x7C00) == 0) && ((a) & 0x03FF))
89
90struct exp8_sig16 { int_fast8_t exp; uint_fast16_t sig; };
91struct exp8_sig16 softfloat_normSubnormalF16Sig( uint_fast16_t );
92
93float16_t softfloat_roundPackToF16( bool, int_fast16_t, uint_fast16_t );
94float16_t softfloat_normRoundPackToF16( bool, int_fast16_t, uint_fast16_t );
95
96float16_t softfloat_addMagsF16( uint_fast16_t, uint_fast16_t );
97float16_t softfloat_subMagsF16( uint_fast16_t, uint_fast16_t );
98float16_t
99 softfloat_mulAddF16(
100     uint_fast16_t, uint_fast16_t, uint_fast16_t, uint_fast8_t );
101
102/*----------------------------------------------------------------------------
103*----------------------------------------------------------------------------*/
104#define signF32UI( a ) ((bool) ((uint32_t) (a)>>31))
105#define expF32UI( a ) ((int_fast16_t) ((a)>>23) & 0xFF)
106#define fracF32UI( a ) ((a) & 0x007FFFFF)
107#define packToF32UI( sign, exp, sig ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<23) + (sig))
108
109#define isNaNF32UI( a ) (((~(a) & 0x7F800000) == 0) && ((a) & 0x007FFFFF))
110
111struct exp16_sig32 { int_fast16_t exp; uint_fast32_t sig; };
112struct exp16_sig32 softfloat_normSubnormalF32Sig( uint_fast32_t );
113
114float32_t softfloat_roundPackToF32( bool, int_fast16_t, uint_fast32_t );
115float32_t softfloat_normRoundPackToF32( bool, int_fast16_t, uint_fast32_t );
116
117float32_t softfloat_addMagsF32( uint_fast32_t, uint_fast32_t );
118float32_t softfloat_subMagsF32( uint_fast32_t, uint_fast32_t );
119float32_t
120 softfloat_mulAddF32(
121     uint_fast32_t, uint_fast32_t, uint_fast32_t, uint_fast8_t );
122
123/*----------------------------------------------------------------------------
124*----------------------------------------------------------------------------*/
125#define signF64UI( a ) ((bool) ((uint64_t) (a)>>63))
126#define expF64UI( a ) ((int_fast16_t) ((a)>>52) & 0x7FF)
127#define fracF64UI( a ) ((a) & UINT64_C( 0x000FFFFFFFFFFFFF ))
128#define packToF64UI( sign, exp, sig ) ((uint64_t) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<52) + (sig)))
129
130#define isNaNF64UI( a ) (((~(a) & UINT64_C( 0x7FF0000000000000 )) == 0) && ((a) & UINT64_C( 0x000FFFFFFFFFFFFF )))
131
132struct exp16_sig64 { int_fast16_t exp; uint_fast64_t sig; };
133struct exp16_sig64 softfloat_normSubnormalF64Sig( uint_fast64_t );
134
135float64_t softfloat_roundPackToF64( bool, int_fast16_t, uint_fast64_t );
136float64_t softfloat_normRoundPackToF64( bool, int_fast16_t, uint_fast64_t );
137
138float64_t softfloat_addMagsF64( uint_fast64_t, uint_fast64_t, bool );
139float64_t softfloat_subMagsF64( uint_fast64_t, uint_fast64_t, bool );
140float64_t
141 softfloat_mulAddF64(
142     uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
143
144/*----------------------------------------------------------------------------
145*----------------------------------------------------------------------------*/
146#define signExtF80UI64( a64 ) ((bool) ((uint16_t) (a64)>>15))
147#define expExtF80UI64( a64 ) ((a64) & 0x7FFF)
148#define packToExtF80UI64( sign, exp ) ((uint_fast16_t) (sign)<<15 | (exp))
149
150#define isNaNExtF80UI( a64, a0 ) ((((a64) & 0x7FFF) == 0x7FFF) && ((a0) & UINT64_C( 0x7FFFFFFFFFFFFFFF )))
151
152#ifdef SOFTFLOAT_FAST_INT64
153
154/*----------------------------------------------------------------------------
155*----------------------------------------------------------------------------*/
156
157struct exp32_sig64 { int_fast32_t exp; uint64_t sig; };
158struct exp32_sig64 softfloat_normSubnormalExtF80Sig( uint_fast64_t );
159
160extFloat80_t
161 softfloat_roundPackToExtF80(
162     bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
163extFloat80_t
164 softfloat_normRoundPackToExtF80(
165     bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast8_t );
166
167extFloat80_t
168 softfloat_addMagsExtF80(
169     uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool );
170extFloat80_t
171 softfloat_subMagsExtF80(
172     uint_fast16_t, uint_fast64_t, uint_fast16_t, uint_fast64_t, bool );
173
174/*----------------------------------------------------------------------------
175*----------------------------------------------------------------------------*/
176#define signF128UI64( a64 ) ((bool) ((uint64_t) (a64)>>63))
177#define expF128UI64( a64 ) ((int_fast32_t) ((a64)>>48) & 0x7FFF)
178#define fracF128UI64( a64 ) ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF ))
179#define packToF128UI64( sign, exp, sig64 ) (((uint_fast64_t) (sign)<<63) + ((uint_fast64_t) (exp)<<48) + (sig64))
180
181#define isNaNF128UI( a64, a0 ) (((~(a64) & UINT64_C( 0x7FFF000000000000 )) == 0) && (a0 || ((a64) & UINT64_C( 0x0000FFFFFFFFFFFF ))))
182
183struct exp32_sig128 { int_fast32_t exp; struct uint128 sig; };
184struct exp32_sig128
185 softfloat_normSubnormalF128Sig( uint_fast64_t, uint_fast64_t );
186
187float128_t
188 softfloat_roundPackToF128(
189     bool, int_fast32_t, uint_fast64_t, uint_fast64_t, uint_fast64_t );
190float128_t
191 softfloat_normRoundPackToF128(
192     bool, int_fast32_t, uint_fast64_t, uint_fast64_t );
193
194float128_t
195 softfloat_addMagsF128(
196     uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool );
197float128_t
198 softfloat_subMagsF128(
199     uint_fast64_t, uint_fast64_t, uint_fast64_t, uint_fast64_t, bool );
200float128_t
201 softfloat_mulAddF128(
202     uint_fast64_t,
203     uint_fast64_t,
204     uint_fast64_t,
205     uint_fast64_t,
206     uint_fast64_t,
207     uint_fast64_t,
208     uint_fast8_t
209 );
210
211#else
212
213/*----------------------------------------------------------------------------
214*----------------------------------------------------------------------------*/
215
216bool
217 softfloat_tryPropagateNaNExtF80M(
218     const struct extFloat80M *,
219     const struct extFloat80M *,
220     struct extFloat80M *
221 );
222void softfloat_invalidExtF80M( struct extFloat80M * );
223
224int softfloat_normExtF80SigM( uint64_t * );
225
226void
227 softfloat_roundPackMToExtF80M(
228     bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * );
229void
230 softfloat_normRoundPackMToExtF80M(
231     bool, int32_t, uint32_t *, uint_fast8_t, struct extFloat80M * );
232
233void
234 softfloat_addExtF80M(
235     const struct extFloat80M *,
236     const struct extFloat80M *,
237     struct extFloat80M *,
238     bool
239 );
240
241int
242 softfloat_compareNonnormExtF80M(
243     const struct extFloat80M *, const struct extFloat80M * );
244
245/*----------------------------------------------------------------------------
246*----------------------------------------------------------------------------*/
247#define signF128UI96( a96 ) ((bool) ((uint32_t) (a96)>>31))
248#define expF128UI96( a96 ) ((int32_t) ((a96)>>16) & 0x7FFF)
249#define fracF128UI96( a96 ) ((a96) & 0x0000FFFF)
250#define packToF128UI96( sign, exp, sig96 ) (((uint32_t) (sign)<<31) + ((uint32_t) (exp)<<16) + (sig96))
251
252bool softfloat_isNaNF128M( const uint32_t * );
253
254bool
255 softfloat_tryPropagateNaNF128M(
256     const uint32_t *, const uint32_t *, uint32_t * );
257void softfloat_invalidF128M( uint32_t * );
258
259int softfloat_shiftNormSigF128M( const uint32_t *, uint_fast8_t, uint32_t * );
260
261void softfloat_roundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * );
262void softfloat_normRoundPackMToF128M( bool, int32_t, uint32_t *, uint32_t * );
263
264void
265 softfloat_addF128M( const uint32_t *, const uint32_t *, uint32_t *, bool );
266void
267 softfloat_mulAddF128M(
268     const uint32_t *,
269     const uint32_t *,
270     const uint32_t *,
271     uint32_t *,
272     uint_fast8_t
273 );
274
275#endif
276
277#endif
278
279