1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
|
/*
* Linux/PA-RISC Project (http://www.parisc-linux.org/)
*
* Floating-point emulation code
* Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org>
*
* This program 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 2, or (at your option)
* any later version.
*
* This program 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef __NO_PA_HDRS
PA header file -- do not include this header file for non-PA builds.
#endif
/* 32-bit word grabbing functions */
#define Sgl_firstword(value) Sall(value)
#define Sgl_secondword(value) dummy_location
#define Sgl_thirdword(value) dummy_location
#define Sgl_fourthword(value) dummy_location
#define Sgl_sign(object) Ssign(object)
#define Sgl_exponent(object) Sexponent(object)
#define Sgl_signexponent(object) Ssignexponent(object)
#define Sgl_mantissa(object) Smantissa(object)
#define Sgl_exponentmantissa(object) Sexponentmantissa(object)
#define Sgl_all(object) Sall(object)
/* sgl_and_signs ANDs the sign bits of each argument and puts the result
* into the first argument. sgl_or_signs ors those same sign bits */
#define Sgl_and_signs( src1dst, src2) \
Sall(src1dst) = (Sall(src2)|~((unsigned int)1<<31)) & Sall(src1dst)
#define Sgl_or_signs( src1dst, src2) \
Sall(src1dst) = (Sall(src2)&((unsigned int)1<<31)) | Sall(src1dst)
/* The hidden bit is always the low bit of the exponent */
#define Sgl_clear_exponent_set_hidden(srcdst) Deposit_sexponent(srcdst,1)
#define Sgl_clear_signexponent_set_hidden(srcdst) \
Deposit_ssignexponent(srcdst,1)
#define Sgl_clear_sign(srcdst) Sall(srcdst) &= ~((unsigned int)1<<31)
#define Sgl_clear_signexponent(srcdst) Sall(srcdst) &= 0x007fffff
/* varamount must be less than 32 for the next three functions */
#define Sgl_rightshift(srcdst, varamount) \
Sall(srcdst) >>= varamount
#define Sgl_leftshift(srcdst, varamount) \
Sall(srcdst) <<= varamount
#define Sgl_rightshift_exponentmantissa(srcdst, varamount) \
Sall(srcdst) = \
(Sexponentmantissa(srcdst) >> varamount) | \
(Sall(srcdst) & ((unsigned int)1<<31))
#define Sgl_leftshiftby1_withextent(left,right,result) \
Shiftdouble(Sall(left),Extall(right),31,Sall(result))
#define Sgl_rightshiftby1_withextent(left,right,dst) \
Shiftdouble(Sall(left),Extall(right),1,Extall(right))
#define Sgl_arithrightshiftby1(srcdst) \
Sall(srcdst) = (int)Sall(srcdst) >> 1
/* Sign extend the sign bit with an integer destination */
#define Sgl_signextendedsign(value) Ssignedsign(value)
#define Sgl_isone_hidden(sgl_value) (Shidden(sgl_value))
#define Sgl_increment(sgl_value) Sall(sgl_value) += 1
#define Sgl_increment_mantissa(sgl_value) \
Deposit_smantissa(sgl_value,sgl_value+1)
#define Sgl_decrement(sgl_value) Sall(sgl_value) -= 1
#define Sgl_isone_sign(sgl_value) (Is_ssign(sgl_value)!=0)
#define Sgl_isone_hiddenoverflow(sgl_value) \
(Is_shiddenoverflow(sgl_value)!=0)
#define Sgl_isone_lowmantissa(sgl_value) (Is_slow(sgl_value)!=0)
#define Sgl_isone_signaling(sgl_value) (Is_ssignaling(sgl_value)!=0)
#define Sgl_is_signalingnan(sgl_value) (Ssignalingnan(sgl_value)==0x1ff)
#define Sgl_isnotzero(sgl_value) (Sall(sgl_value)!=0)
#define Sgl_isnotzero_hiddenhigh7mantissa(sgl_value) \
(Shiddenhigh7mantissa(sgl_value)!=0)
#define Sgl_isnotzero_low4(sgl_value) (Slow4(sgl_value)!=0)
#define Sgl_isnotzero_exponent(sgl_value) (Sexponent(sgl_value)!=0)
#define Sgl_isnotzero_mantissa(sgl_value) (Smantissa(sgl_value)!=0)
#define Sgl_isnotzero_exponentmantissa(sgl_value) \
(Sexponentmantissa(sgl_value)!=0)
#define Sgl_iszero(sgl_value) (Sall(sgl_value)==0)
#define Sgl_iszero_signaling(sgl_value) (Is_ssignaling(sgl_value)==0)
#define Sgl_iszero_hidden(sgl_value) (Is_shidden(sgl_value)==0)
#define Sgl_iszero_hiddenoverflow(sgl_value) \
(Is_shiddenoverflow(sgl_value)==0)
#define Sgl_iszero_hiddenhigh3mantissa(sgl_value) \
(Shiddenhigh3mantissa(sgl_value)==0)
#define Sgl_iszero_hiddenhigh7mantissa(sgl_value) \
(Shiddenhigh7mantissa(sgl_value)==0)
#define Sgl_iszero_sign(sgl_value) (Is_ssign(sgl_value)==0)
#define Sgl_iszero_exponent(sgl_value) (Sexponent(sgl_value)==0)
#define Sgl_iszero_mantissa(sgl_value) (Smantissa(sgl_value)==0)
#define Sgl_iszero_exponentmantissa(sgl_value) \
(Sexponentmantissa(sgl_value)==0)
#define Sgl_isinfinity_exponent(sgl_value) \
(Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT)
#define Sgl_isnotinfinity_exponent(sgl_value) \
(Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT)
#define Sgl_isinfinity(sgl_value) \
(Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \
Sgl_mantissa(sgl_value)==0)
#define Sgl_isnan(sgl_value) \
(Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \
Sgl_mantissa(sgl_value)!=0)
#define Sgl_isnotnan(sgl_value) \
(Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT || \
Sgl_mantissa(sgl_value)==0)
#define Sgl_islessthan(sgl_op1,sgl_op2) \
(Sall(sgl_op1) < Sall(sgl_op2))
#define Sgl_isgreaterthan(sgl_op1,sgl_op2) \
(Sall(sgl_op1) > Sall(sgl_op2))
#define Sgl_isnotlessthan(sgl_op1,sgl_op2) \
(Sall(sgl_op1) >= Sall(sgl_op2))
#define Sgl_isequal(sgl_op1,sgl_op2) \
(Sall(sgl_op1) == Sall(sgl_op2))
#define Sgl_leftshiftby8(sgl_value) \
Sall(sgl_value) <<= 8
#define Sgl_leftshiftby4(sgl_value) \
Sall(sgl_value) <<= 4
#define Sgl_leftshiftby3(sgl_value) \
Sall(sgl_value) <<= 3
#define Sgl_leftshiftby2(sgl_value) \
Sall(sgl_value) <<= 2
#define Sgl_leftshiftby1(sgl_value) \
Sall(sgl_value) <<= 1
#define Sgl_rightshiftby1(sgl_value) \
Sall(sgl_value) >>= 1
#define Sgl_rightshiftby4(sgl_value) \
Sall(sgl_value) >>= 4
#define Sgl_rightshiftby8(sgl_value) \
Sall(sgl_value) >>= 8
#define Sgl_ismagnitudeless(signlessleft,signlessright) \
/* unsigned int signlessleft, signlessright; */ \
(signlessleft < signlessright)
#define Sgl_copytoint_exponentmantissa(source,dest) \
dest = Sexponentmantissa(source)
/* A quiet NaN has the high mantissa bit clear and at least on other (in this
* case the adjacent bit) bit set. */
#define Sgl_set_quiet(sgl_value) Deposit_shigh2mantissa(sgl_value,1)
#define Sgl_set_exponent(sgl_value,exp) Deposit_sexponent(sgl_value,exp)
#define Sgl_set_mantissa(dest,value) Deposit_smantissa(dest,value)
#define Sgl_set_exponentmantissa(dest,value) \
Deposit_sexponentmantissa(dest,value)
/* An infinity is represented with the max exponent and a zero mantissa */
#define Sgl_setinfinity_exponent(sgl_value) \
Deposit_sexponent(sgl_value,SGL_INFINITY_EXPONENT)
#define Sgl_setinfinity_exponentmantissa(sgl_value) \
Deposit_sexponentmantissa(sgl_value, \
(SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))))
#define Sgl_setinfinitypositive(sgl_value) \
Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH)))
#define Sgl_setinfinitynegative(sgl_value) \
Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) \
| ((unsigned int)1<<31)
#define Sgl_setinfinity(sgl_value,sign) \
Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | \
((unsigned int)sign << 31)
#define Sgl_sethigh4bits(sgl_value, extsign) \
Deposit_shigh4(sgl_value,extsign)
#define Sgl_set_sign(sgl_value,sign) Deposit_ssign(sgl_value,sign)
#define Sgl_invert_sign(sgl_value) \
Deposit_ssign(sgl_value,~Ssign(sgl_value))
#define Sgl_setone_sign(sgl_value) Deposit_ssign(sgl_value,1)
#define Sgl_setone_lowmantissa(sgl_value) Deposit_slow(sgl_value,1)
#define Sgl_setzero_sign(sgl_value) Sall(sgl_value) &= 0x7fffffff
#define Sgl_setzero_exponent(sgl_value) Sall(sgl_value) &= 0x807fffff
#define Sgl_setzero_mantissa(sgl_value) Sall(sgl_value) &= 0xff800000
#define Sgl_setzero_exponentmantissa(sgl_value) Sall(sgl_value) &= 0x80000000
#define Sgl_setzero(sgl_value) Sall(sgl_value) = 0
#define Sgl_setnegativezero(sgl_value) Sall(sgl_value) = (unsigned int)1 << 31
/* Use following macro for both overflow & underflow conditions */
#define ovfl -
#define unfl +
#define Sgl_setwrapped_exponent(sgl_value,exponent,op) \
Deposit_sexponent(sgl_value,(exponent op SGL_WRAP))
#define Sgl_setlargestpositive(sgl_value) \
Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \
| ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 )
#define Sgl_setlargestnegative(sgl_value) \
Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \
| ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) \
| ((unsigned int)1<<31)
#define Sgl_setnegativeinfinity(sgl_value) \
Sall(sgl_value) = \
((1<<SGL_EXP_LENGTH) | SGL_INFINITY_EXPONENT) << (32-(1+SGL_EXP_LENGTH))
#define Sgl_setlargest(sgl_value,sign) \
Sall(sgl_value) = (unsigned int)sign << 31 | \
(((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \
| ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 ))
#define Sgl_setlargest_exponentmantissa(sgl_value) \
Sall(sgl_value) = Sall(sgl_value) & ((unsigned int)1<<31) | \
(((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \
| ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 ))
/* The high bit is always zero so arithmetic or logical shifts will work. */
#define Sgl_right_align(srcdst,shift,extent) \
/* sgl_floating_point srcdst; int shift; extension extent */ \
if (shift < 32) { \
Extall(extent) = Sall(srcdst) << (32-(shift)); \
Sall(srcdst) >>= shift; \
} \
else { \
Extall(extent) = Sall(srcdst); \
Sall(srcdst) = 0; \
}
#define Sgl_hiddenhigh3mantissa(sgl_value) Shiddenhigh3mantissa(sgl_value)
#define Sgl_hidden(sgl_value) Shidden(sgl_value)
#define Sgl_lowmantissa(sgl_value) Slow(sgl_value)
/* The left argument is never smaller than the right argument */
#define Sgl_subtract(sgl_left,sgl_right,sgl_result) \
Sall(sgl_result) = Sall(sgl_left) - Sall(sgl_right)
/* Subtract right augmented with extension from left augmented with zeros and
* store into result and extension. */
#define Sgl_subtract_withextension(left,right,extent,result) \
/* sgl_floating_point left,right,result; extension extent */ \
Sgl_subtract(left,right,result); \
if((Extall(extent) = 0-Extall(extent))) \
Sall(result) = Sall(result)-1
#define Sgl_addition(sgl_left,sgl_right,sgl_result) \
Sall(sgl_result) = Sall(sgl_left) + Sall(sgl_right)
#define Sgl_xortointp1(left,right,result) \
result = Sall(left) XOR Sall(right);
#define Sgl_xorfromintp1(left,right,result) \
Sall(result) = left XOR Sall(right)
/* Need to Initialize */
#define Sgl_makequietnan(dest) \
Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \
| (1<<(32-(1+SGL_EXP_LENGTH+2)))
#define Sgl_makesignalingnan(dest) \
Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \
| (1<<(32-(1+SGL_EXP_LENGTH+1)))
#define Sgl_normalize(sgl_opnd,exponent) \
while(Sgl_iszero_hiddenhigh7mantissa(sgl_opnd)) { \
Sgl_leftshiftby8(sgl_opnd); \
exponent -= 8; \
} \
if(Sgl_iszero_hiddenhigh3mantissa(sgl_opnd)) { \
Sgl_leftshiftby4(sgl_opnd); \
exponent -= 4; \
} \
while(Sgl_iszero_hidden(sgl_opnd)) { \
Sgl_leftshiftby1(sgl_opnd); \
exponent -= 1; \
}
#define Sgl_setoverflow(sgl_opnd) \
/* set result to infinity or largest number */ \
switch (Rounding_mode()) { \
case ROUNDPLUS: \
if (Sgl_isone_sign(sgl_opnd)) { \
Sgl_setlargestnegative(sgl_opnd); \
} \
else { \
Sgl_setinfinitypositive(sgl_opnd); \
} \
break; \
case ROUNDMINUS: \
if (Sgl_iszero_sign(sgl_opnd)) { \
Sgl_setlargestpositive(sgl_opnd); \
} \
else { \
Sgl_setinfinitynegative(sgl_opnd); \
} \
break; \
case ROUNDNEAREST: \
Sgl_setinfinity_exponentmantissa(sgl_opnd); \
break; \
case ROUNDZERO: \
Sgl_setlargest_exponentmantissa(sgl_opnd); \
}
#define Sgl_denormalize(opnd,exponent,guard,sticky,inexact) \
Sgl_clear_signexponent_set_hidden(opnd); \
if (exponent >= (1 - SGL_P)) { \
guard = (Sall(opnd) >> -exponent) & 1; \
if (exponent < 0) sticky |= Sall(opnd) << (32+exponent); \
inexact = guard | sticky; \
Sall(opnd) >>= (1-exponent); \
} \
else { \
guard = 0; \
sticky |= Sall(opnd); \
inexact = sticky; \
Sgl_setzero(opnd); \
}
/*
* The fused multiply add instructions requires a single extended format,
* with 48 bits of mantissa.
*/
#define SGLEXT_THRESHOLD 48
#define Sglext_setzero(valA,valB) \
Sextallp1(valA) = 0; Sextallp2(valB) = 0
#define Sglext_isnotzero_mantissap2(valB) (Sextallp2(valB)!=0)
#define Sglext_isone_lowp1(val) (Sextlowp1(val)!=0)
#define Sglext_isone_highp2(val) (Sexthighp2(val)!=0)
#define Sglext_isnotzero_low31p2(val) (Sextlow31p2(val)!=0)
#define Sglext_iszero(valA,valB) (Sextallp1(valA)==0 && Sextallp2(valB)==0)
#define Sgl_copytoptr(src,destptr) *destptr = src
#define Sgl_copyfromptr(srcptr,dest) dest = *srcptr
#define Sglext_copy(srca,srcb,desta,destb) \
Sextallp1(desta) = Sextallp1(srca); \
Sextallp2(destb) = Sextallp2(srcb)
#define Sgl_copyto_sglext(src1,dest1,dest2) \
Sextallp1(dest1) = Sall(src1); Sextallp2(dest2) = 0
#define Sglext_swap_lower(leftp2,rightp2) \
Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \
Sextallp2(rightp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \
Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2)
#define Sglext_setone_lowmantissap2(value) Deposit_dlowp2(value,1)
/* The high bit is always zero so arithmetic or logical shifts will work. */
#define Sglext_right_align(srcdstA,srcdstB,shift) \
{int shiftamt, sticky; \
shiftamt = shift % 32; \
sticky = 0; \
switch (shift/32) { \
case 0: if (shiftamt > 0) { \
sticky = Sextallp2(srcdstB) << 32 - (shiftamt); \
Variable_shift_double(Sextallp1(srcdstA), \
Sextallp2(srcdstB),shiftamt,Sextallp2(srcdstB)); \
Sextallp1(srcdstA) >>= shiftamt; \
} \
break; \
case 1: if (shiftamt > 0) { \
sticky = (Sextallp1(srcdstA) << 32 - (shiftamt)) | \
Sextallp2(srcdstB); \
} \
else { \
sticky = Sextallp2(srcdstB); \
} \
Sextallp2(srcdstB) = Sextallp1(srcdstA) >> shiftamt; \
Sextallp1(srcdstA) = 0; \
break; \
} \
if (sticky) Sglext_setone_lowmantissap2(srcdstB); \
}
/* The left argument is never smaller than the right argument */
#define Sglext_subtract(lefta,leftb,righta,rightb,resulta,resultb) \
if( Sextallp2(rightb) > Sextallp2(leftb) ) Sextallp1(lefta)--; \
Sextallp2(resultb) = Sextallp2(leftb) - Sextallp2(rightb); \
Sextallp1(resulta) = Sextallp1(lefta) - Sextallp1(righta)
#define Sglext_addition(lefta,leftb,righta,rightb,resulta,resultb) \
/* If the sum of the low words is less than either source, then \
* an overflow into the next word occurred. */ \
if ((Sextallp2(resultb) = Sextallp2(leftb)+Sextallp2(rightb)) < \
Sextallp2(rightb)) \
Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)+1; \
else Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)
#define Sglext_arithrightshiftby1(srcdstA,srcdstB) \
Shiftdouble(Sextallp1(srcdstA),Sextallp2(srcdstB),1,Sextallp2(srcdstB)); \
Sextallp1(srcdstA) = (int)Sextallp1(srcdstA) >> 1
#define Sglext_leftshiftby8(valA,valB) \
Shiftdouble(Sextallp1(valA),Sextallp2(valB),24,Sextallp1(valA)); \
Sextallp2(valB) <<= 8
#define Sglext_leftshiftby4(valA,valB) \
Shiftdouble(Sextallp1(valA),Sextallp2(valB),28,Sextallp1(valA)); \
Sextallp2(valB) <<= 4
#define Sglext_leftshiftby3(valA,valB) \
Shiftdouble(Sextallp1(valA),Sextallp2(valB),29,Sextallp1(valA)); \
Sextallp2(valB) <<= 3
#define Sglext_leftshiftby2(valA,valB) \
Shiftdouble(Sextallp1(valA),Sextallp2(valB),30,Sextallp1(valA)); \
Sextallp2(valB) <<= 2
#define Sglext_leftshiftby1(valA,valB) \
Shiftdouble(Sextallp1(valA),Sextallp2(valB),31,Sextallp1(valA)); \
Sextallp2(valB) <<= 1
#define Sglext_rightshiftby4(valueA,valueB) \
Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),4,Sextallp2(valueB)); \
Sextallp1(valueA) >>= 4
#define Sglext_rightshiftby3(valueA,valueB) \
Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),3,Sextallp2(valueB)); \
Sextallp1(valueA) >>= 3
#define Sglext_rightshiftby1(valueA,valueB) \
Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),1,Sextallp2(valueB)); \
Sextallp1(valueA) >>= 1
#define Sglext_xortointp1(left,right,result) Sgl_xortointp1(left,right,result)
#define Sglext_xorfromintp1(left,right,result) \
Sgl_xorfromintp1(left,right,result)
#define Sglext_copytoint_exponentmantissa(src,dest) \
Sgl_copytoint_exponentmantissa(src,dest)
#define Sglext_ismagnitudeless(signlessleft,signlessright) \
Sgl_ismagnitudeless(signlessleft,signlessright)
#define Sglext_set_sign(dbl_value,sign) Sgl_set_sign(dbl_value,sign)
#define Sglext_clear_signexponent_set_hidden(srcdst) \
Sgl_clear_signexponent_set_hidden(srcdst)
#define Sglext_clear_signexponent(srcdst) Sgl_clear_signexponent(srcdst)
#define Sglext_clear_sign(srcdst) Sgl_clear_sign(srcdst)
#define Sglext_isone_hidden(dbl_value) Sgl_isone_hidden(dbl_value)
#define Sglext_denormalize(opndp1,opndp2,exponent,is_tiny) \
{int sticky; \
is_tiny = TRUE; \
if (exponent == 0 && Sextallp2(opndp2)) { \
switch (Rounding_mode()) { \
case ROUNDPLUS: \
if (Sgl_iszero_sign(opndp1)) \
if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \
is_tiny = FALSE; \
break; \
case ROUNDMINUS: \
if (Sgl_isone_sign(opndp1)) { \
if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \
is_tiny = FALSE; \
} \
break; \
case ROUNDNEAREST: \
if (Sglext_isone_highp2(opndp2) && \
(Sglext_isone_lowp1(opndp1) || \
Sglext_isnotzero_low31p2(opndp2))) \
if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \
is_tiny = FALSE; \
break; \
} \
} \
Sglext_clear_signexponent_set_hidden(opndp1); \
if (exponent >= (1-DBL_P)) { \
if (exponent >= -31) { \
if (exponent > -31) { \
sticky = Sextallp2(opndp2) << 31+exponent; \
Variable_shift_double(opndp1,opndp2,1-exponent,opndp2); \
Sextallp1(opndp1) >>= 1-exponent; \
} \
else { \
sticky = Sextallp2(opndp2); \
Sextallp2(opndp2) = Sextallp1(opndp1); \
Sextallp1(opndp1) = 0; \
} \
} \
else { \
sticky = (Sextallp1(opndp1) << 31+exponent) | \
Sextallp2(opndp2); \
Sextallp2(opndp2) = Sextallp1(opndp1) >> -31-exponent; \
Sextallp1(opndp1) = 0; \
} \
} \
else { \
sticky = Sextallp1(opndp1) | Sextallp2(opndp2); \
Sglext_setzero(opndp1,opndp2); \
} \
if (sticky) Sglext_setone_lowmantissap2(opndp2); \
exponent = 0; \
}
|
