1 /* SPDX-License-Identifier: GPL-2.0-or-later * 1
2 /*
3 * Linux/PA-RISC Project (http://www.parisc-li
4 *
5 * Floating-point emulation code
6 * Copyright (C) 2001 Hewlett-Packard (Paul B
7 */
8
9 #ifdef __NO_PA_HDRS
10 PA header file -- do not include this head
11 #endif
12
13 /* 32-bit word grabbing functions */
14 #define Sgl_firstword(value) Sall(value)
15 #define Sgl_secondword(value) dummy_location
16 #define Sgl_thirdword(value) dummy_location
17 #define Sgl_fourthword(value) dummy_location
18
19 #define Sgl_sign(object) Ssign(object)
20 #define Sgl_exponent(object) Sexponent(object)
21 #define Sgl_signexponent(object) Ssignexponent
22 #define Sgl_mantissa(object) Smantissa(object)
23 #define Sgl_exponentmantissa(object) Sexponent
24 #define Sgl_all(object) Sall(object)
25
26 /* sgl_and_signs ANDs the sign bits of each ar
27 * into the first argument. sgl_or_signs ors t
28 #define Sgl_and_signs( src1dst, src2)
29 Sall(src1dst) = (Sall(src2)|~((unsigned in
30 #define Sgl_or_signs( src1dst, src2)
31 Sall(src1dst) = (Sall(src2)&((unsigned int
32
33 /* The hidden bit is always the low bit of the
34 #define Sgl_clear_exponent_set_hidden(srcdst)
35 #define Sgl_clear_signexponent_set_hidden(srcd
36 Deposit_ssignexponent(srcdst,1)
37 #define Sgl_clear_sign(srcdst) Sall(srcdst) &=
38 #define Sgl_clear_signexponent(srcdst) Sall(sr
39
40 /* varamount must be less than 32 for the next
41 #define Sgl_rightshift(srcdst, varamount)
42 Sall(srcdst) >>= varamount
43 #define Sgl_leftshift(srcdst, varamount)
44 Sall(srcdst) <<= varamount
45 #define Sgl_rightshift_exponentmantissa(srcdst
46 Sall(srcdst) = \
47 (Sexponentmantissa(srcdst) >> varamoun
48 (Sall(srcdst) & ((unsigned int)1<<31))
49
50 #define Sgl_leftshiftby1_withextent(left,right
51 Shiftdouble(Sall(left),Extall(right),31,Sa
52
53 #define Sgl_rightshiftby1_withextent(left,righ
54 Shiftdouble(Sall(left),Extall(right),1,Ext
55 #define Sgl_arithrightshiftby1(srcdst) \
56 Sall(srcdst) = (int)Sall(srcdst) >> 1
57
58 /* Sign extend the sign bit with an integer de
59 #define Sgl_signextendedsign(value) Ssignedsig
60
61 #define Sgl_isone_hidden(sgl_value) (Shidden(s
62 #define Sgl_increment(sgl_value) Sall(sgl_valu
63 #define Sgl_increment_mantissa(sgl_value) \
64 Deposit_smantissa(sgl_value,sgl_value+1)
65 #define Sgl_decrement(sgl_value) Sall(sgl_valu
66
67 #define Sgl_isone_sign(sgl_value) (Is_ssign(sg
68 #define Sgl_isone_hiddenoverflow(sgl_value) \
69 (Is_shiddenoverflow(sgl_value)!=0)
70 #define Sgl_isone_lowmantissa(sgl_value) (Is_s
71 #define Sgl_isone_signaling(sgl_value) (Is_ssi
72 #define Sgl_is_signalingnan(sgl_value) (Ssigna
73 #define Sgl_isnotzero(sgl_value) (Sall(sgl_val
74 #define Sgl_isnotzero_hiddenhigh7mantissa(sgl_
75 (Shiddenhigh7mantissa(sgl_value)!=0)
76 #define Sgl_isnotzero_low4(sgl_value) (Slow4(s
77 #define Sgl_isnotzero_exponent(sgl_value) (Sex
78 #define Sgl_isnotzero_mantissa(sgl_value) (Sma
79 #define Sgl_isnotzero_exponentmantissa(sgl_val
80 (Sexponentmantissa(sgl_value)!=0)
81 #define Sgl_iszero(sgl_value) (Sall(sgl_value)
82 #define Sgl_iszero_signaling(sgl_value) (Is_ss
83 #define Sgl_iszero_hidden(sgl_value) (Is_shidd
84 #define Sgl_iszero_hiddenoverflow(sgl_value) \
85 (Is_shiddenoverflow(sgl_value)==0)
86 #define Sgl_iszero_hiddenhigh3mantissa(sgl_val
87 (Shiddenhigh3mantissa(sgl_value)==0)
88 #define Sgl_iszero_hiddenhigh7mantissa(sgl_val
89 (Shiddenhigh7mantissa(sgl_value)==0)
90 #define Sgl_iszero_sign(sgl_value) (Is_ssign(s
91 #define Sgl_iszero_exponent(sgl_value) (Sexpon
92 #define Sgl_iszero_mantissa(sgl_value) (Smanti
93 #define Sgl_iszero_exponentmantissa(sgl_value)
94 (Sexponentmantissa(sgl_value)==0)
95 #define Sgl_isinfinity_exponent(sgl_value)
96 (Sgl_exponent(sgl_value)==SGL_INFINITY_EXP
97 #define Sgl_isnotinfinity_exponent(sgl_value)
98 (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXP
99 #define Sgl_isinfinity(sgl_value)
100 (Sgl_exponent(sgl_value)==SGL_INFINITY_EXP
101 Sgl_mantissa(sgl_value)==0)
102 #define Sgl_isnan(sgl_value)
103 (Sgl_exponent(sgl_value)==SGL_INFINITY_EXP
104 Sgl_mantissa(sgl_value)!=0)
105 #define Sgl_isnotnan(sgl_value)
106 (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXP
107 Sgl_mantissa(sgl_value)==0)
108 #define Sgl_islessthan(sgl_op1,sgl_op2)
109 (Sall(sgl_op1) < Sall(sgl_op2))
110 #define Sgl_isgreaterthan(sgl_op1,sgl_op2)
111 (Sall(sgl_op1) > Sall(sgl_op2))
112 #define Sgl_isnotlessthan(sgl_op1,sgl_op2)
113 (Sall(sgl_op1) >= Sall(sgl_op2))
114 #define Sgl_isequal(sgl_op1,sgl_op2)
115 (Sall(sgl_op1) == Sall(sgl_op2))
116
117 #define Sgl_leftshiftby8(sgl_value) \
118 Sall(sgl_value) <<= 8
119 #define Sgl_leftshiftby4(sgl_value) \
120 Sall(sgl_value) <<= 4
121 #define Sgl_leftshiftby3(sgl_value) \
122 Sall(sgl_value) <<= 3
123 #define Sgl_leftshiftby2(sgl_value) \
124 Sall(sgl_value) <<= 2
125 #define Sgl_leftshiftby1(sgl_value) \
126 Sall(sgl_value) <<= 1
127 #define Sgl_rightshiftby1(sgl_value) \
128 Sall(sgl_value) >>= 1
129 #define Sgl_rightshiftby4(sgl_value) \
130 Sall(sgl_value) >>= 4
131 #define Sgl_rightshiftby8(sgl_value) \
132 Sall(sgl_value) >>= 8
133
134 #define Sgl_ismagnitudeless(signlessleft,signl
135 /* unsigned int signlessleft, signlessright;
136 (signlessleft < signlessright)
137
138
139 #define Sgl_copytoint_exponentmantissa(source,
140 dest = Sexponentmantissa(source)
141
142 /* A quiet NaN has the high mantissa bit clear
143 * case the adjacent bit) bit set. */
144 #define Sgl_set_quiet(sgl_value) Deposit_shigh
145 #define Sgl_set_exponent(sgl_value,exp) Deposi
146
147 #define Sgl_set_mantissa(dest,value) Deposit_s
148 #define Sgl_set_exponentmantissa(dest,value) \
149 Deposit_sexponentmantissa(dest,value)
150
151 /* An infinity is represented with the max ex
152 #define Sgl_setinfinity_exponent(sgl_value) \
153 Deposit_sexponent(sgl_value,SGL_INFINITY_E
154 #define Sgl_setinfinity_exponentmantissa(sgl_v
155 Deposit_sexponentmantissa(sgl_value, \
156 (SGL_INFINITY_EXPONENT << (32-(1+SGL_E
157 #define Sgl_setinfinitypositive(sgl_value)
158 Sall(sgl_value) = (SGL_INFINITY_EXPONENT <
159 #define Sgl_setinfinitynegative(sgl_value)
160 Sall(sgl_value) = (SGL_INFINITY_EXPONENT <
161 | ((unsigned int)1<<31)
162 #define Sgl_setinfinity(sgl_value,sign)
163 Sall(sgl_value) = (SGL_INFINITY_EXPONENT <
164 ((unsigned int)sign << 31)
165 #define Sgl_sethigh4bits(sgl_value, extsign)
166 Deposit_shigh4(sgl_value,extsign)
167 #define Sgl_set_sign(sgl_value,sign) Deposit_s
168 #define Sgl_invert_sign(sgl_value) \
169 Deposit_ssign(sgl_value,~Ssign(sgl_value))
170 #define Sgl_setone_sign(sgl_value) Deposit_ssi
171 #define Sgl_setone_lowmantissa(sgl_value) Depo
172 #define Sgl_setzero_sign(sgl_value) Sall(sgl_
173 #define Sgl_setzero_exponent(sgl_value) Sall(s
174 #define Sgl_setzero_mantissa(sgl_value) Sall(s
175 #define Sgl_setzero_exponentmantissa(sgl_value
176 #define Sgl_setzero(sgl_value) Sall(sgl_value)
177 #define Sgl_setnegativezero(sgl_value) Sall(sg
178
179 /* Use following macro for both overflow & und
180 #define ovfl -
181 #define unfl +
182 #define Sgl_setwrapped_exponent(sgl_value,expo
183 Deposit_sexponent(sgl_value,(exponent op S
184
185 #define Sgl_setlargestpositive(sgl_value)
186 Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) <<
187 | ((1<<(32-(1+SGL_EXP_LE
188 #define Sgl_setlargestnegative(sgl_value)
189 Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) <<
190 | ((1<<(32-(1+SGL_EXP_LE
191 | ((unsigned int)1<<31)
192
193 #define Sgl_setnegativeinfinity(sgl_value)
194 Sall(sgl_value) =
195 ((1<<SGL_EXP_LENGTH) | SGL_INFINITY_EXPONE
196 #define Sgl_setlargest(sgl_value,sign)
197 Sall(sgl_value) = (unsigned int)sign << 31
198 (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EX
199 | ((1 << (32-(1+SGL_EXP_LENGTH))) -
200 #define Sgl_setlargest_exponentmantissa(sgl_va
201 Sall(sgl_value) = Sall(sgl_value) & ((unsi
202 (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EX
203 | ((1 << (32-(1+SGL_EXP_LENGTH))) -
204
205 /* The high bit is always zero so arithmetic o
206 #define Sgl_right_align(srcdst,shift,extent)
207 /* sgl_floating_point srcdst; int shift; e
208 if (shift < 32) {
209 Extall(extent) = Sall(srcdst) << (32-(
210 Sall(srcdst) >>= shift;
211 }
212 else {
213 Extall(extent) = Sall(srcdst);
214 Sall(srcdst) = 0;
215 }
216 #define Sgl_hiddenhigh3mantissa(sgl_value) Shi
217 #define Sgl_hidden(sgl_value) Shidden(sgl_valu
218 #define Sgl_lowmantissa(sgl_value) Slow(sgl_va
219
220 /* The left argument is never smaller than the
221 #define Sgl_subtract(sgl_left,sgl_right,sgl_re
222 Sall(sgl_result) = Sall(sgl_left) - Sall(s
223
224 /* Subtract right augmented with extension fro
225 * store into result and extension. */
226 #define Sgl_subtract_withextension(left,right,
227 /* sgl_floating_point left,right,result; e
228 Sgl_subtract(left,right,result);
229 if((Extall(extent) = 0-Extall(extent)))
230 Sall(result) = Sall(result)-1
231
232 #define Sgl_addition(sgl_left,sgl_right,sgl_re
233 Sall(sgl_result) = Sall(sgl_left) + Sall(s
234
235 #define Sgl_xortointp1(left,right,result)
236 result = Sall(left) XOR Sall(right);
237
238 #define Sgl_xorfromintp1(left,right,result)
239 Sall(result) = left XOR Sall(right)
240
241 /* Need to Initialize */
242 #define Sgl_makequietnan(dest)
243 Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32
244 | (1<<(32-(1+SGL_EXP_LENGTH+2
245 #define Sgl_makesignalingnan(dest)
246 Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32
247 | (1<<(32-(1+SGL_EXP_LENGTH+1
248
249 #define Sgl_normalize(sgl_opnd,exponent)
250 while(Sgl_iszero_hiddenhigh7mantissa(s
251 Sgl_leftshiftby8(sgl_opnd);
252 exponent -= 8;
253 }
254 if(Sgl_iszero_hiddenhigh3mantissa(sgl_
255 Sgl_leftshiftby4(sgl_opnd);
256 exponent -= 4;
257 }
258 while(Sgl_iszero_hidden(sgl_opnd)) {
259 Sgl_leftshiftby1(sgl_opnd);
260 exponent -= 1;
261 }
262
263 #define Sgl_setoverflow(sgl_opnd)
264 /* set result to infinity or largest n
265 switch (Rounding_mode()) {
266 case ROUNDPLUS:
267 if (Sgl_isone_sign(sgl
268 Sgl_setlargest
269 }
270 else {
271 Sgl_setinfinit
272 }
273 break;
274 case ROUNDMINUS:
275 if (Sgl_iszero_sign(sg
276 Sgl_setlargest
277 }
278 else {
279 Sgl_setinfinit
280 }
281 break;
282 case ROUNDNEAREST:
283 Sgl_setinfinity_expone
284 break;
285 case ROUNDZERO:
286 Sgl_setlargest_exponen
287 }
288
289 #define Sgl_denormalize(opnd,exponent,guard,st
290 Sgl_clear_signexponent_set_hidden(opnd
291 if (exponent >= (1 - SGL_P)) {
292 guard = (Sall(opnd) >> -expone
293 if (exponent < 0) sticky |= Sa
294 inexact = guard | sticky;
295 Sall(opnd) >>= (1-exponent);
296 }
297 else {
298 guard = 0;
299 sticky |= Sall(opnd);
300 inexact = sticky;
301 Sgl_setzero(opnd);
302 }
303
304 /*
305 * The fused multiply add instructions require
306 * with 48 bits of mantissa.
307 */
308 #define SGLEXT_THRESHOLD 48
309
310 #define Sglext_setzero(valA,valB) \
311 Sextallp1(valA) = 0; Sextallp2(valB) = 0
312
313 #define Sglext_isnotzero_mantissap2(valB) (Sex
314 #define Sglext_isone_lowp1(val) (Sextlowp1(val
315 #define Sglext_isone_highp2(val) (Sexthighp2(v
316 #define Sglext_isnotzero_low31p2(val) (Sextlow
317 #define Sglext_iszero(valA,valB) (Sextallp1(va
318
319 #define Sgl_copytoptr(src,destptr) *destptr =
320 #define Sgl_copyfromptr(srcptr,dest) dest = *s
321 #define Sglext_copy(srca,srcb,desta,destb) \
322 Sextallp1(desta) = Sextallp1(srca); \
323 Sextallp2(destb) = Sextallp2(srcb)
324 #define Sgl_copyto_sglext(src1,dest1,dest2) \
325 Sextallp1(dest1) = Sall(src1); Sextall
326
327 #define Sglext_swap_lower(leftp2,rightp2) \
328 Sextallp2(leftp2) = Sextallp2(leftp2) XOR
329 Sextallp2(rightp2) = Sextallp2(leftp2) XOR
330 Sextallp2(leftp2) = Sextallp2(leftp2) XOR
331
332 #define Sglext_setone_lowmantissap2(value) Dep
333
334 /* The high bit is always zero so arithmetic o
335 #define Sglext_right_align(srcdstA,srcdstB,shi
336 {int shiftamt, sticky;
337 shiftamt = shift % 32;
338 sticky = 0;
339 switch (shift/32) {
340 case 0: if (shiftamt > 0) {
341 sticky = Sextallp2(srcdstB) <<
342 Variable_shift_double(Sextallp
343 Sextallp2(srcdstB),shiftamt,S
344 Sextallp1(srcdstA) >>= shiftam
345 }
346 break;
347 case 1: if (shiftamt > 0) {
348 sticky = (Sextallp1(srcdstA) <
349 Sextallp2(srcdstB);
350 }
351 else {
352 sticky = Sextallp2(srcdstB);
353 }
354 Sextallp2(srcdstB) = Sextallp1(sr
355 Sextallp1(srcdstA) = 0;
356 break;
357 }
358 if (sticky) Sglext_setone_lowmantissap2(sr
359 }
360
361 /* The left argument is never smaller than the
362 #define Sglext_subtract(lefta,leftb,righta,rig
363 if( Sextallp2(rightb) > Sextallp2(leftb) )
364 Sextallp2(resultb) = Sextallp2(leftb) - Se
365 Sextallp1(resulta) = Sextallp1(lefta) - Se
366
367 #define Sglext_addition(lefta,leftb,righta,rig
368 /* If the sum of the low words is less tha
369 * an overflow into the next word occurred
370 if ((Sextallp2(resultb) = Sextallp2(leftb)
371 Sextallp2(rightb)) \
372 Sextallp1(resulta) = Sextallp1(lef
373 else Sextallp1(resulta) = Sextallp1(lefta)
374
375
376 #define Sglext_arithrightshiftby1(srcdstA,srcd
377 Shiftdouble(Sextallp1(srcdstA),Sextallp2(s
378 Sextallp1(srcdstA) = (int)Sextallp1(srcdst
379
380 #define Sglext_leftshiftby8(valA,valB) \
381 Shiftdouble(Sextallp1(valA),Sextallp2(valB
382 Sextallp2(valB) <<= 8
383 #define Sglext_leftshiftby4(valA,valB) \
384 Shiftdouble(Sextallp1(valA),Sextallp2(valB
385 Sextallp2(valB) <<= 4
386 #define Sglext_leftshiftby3(valA,valB) \
387 Shiftdouble(Sextallp1(valA),Sextallp2(valB
388 Sextallp2(valB) <<= 3
389 #define Sglext_leftshiftby2(valA,valB) \
390 Shiftdouble(Sextallp1(valA),Sextallp2(valB
391 Sextallp2(valB) <<= 2
392 #define Sglext_leftshiftby1(valA,valB) \
393 Shiftdouble(Sextallp1(valA),Sextallp2(valB
394 Sextallp2(valB) <<= 1
395
396 #define Sglext_rightshiftby4(valueA,valueB) \
397 Shiftdouble(Sextallp1(valueA),Sextallp2(va
398 Sextallp1(valueA) >>= 4
399 #define Sglext_rightshiftby3(valueA,valueB) \
400 Shiftdouble(Sextallp1(valueA),Sextallp2(va
401 Sextallp1(valueA) >>= 3
402 #define Sglext_rightshiftby1(valueA,valueB) \
403 Shiftdouble(Sextallp1(valueA),Sextallp2(va
404 Sextallp1(valueA) >>= 1
405
406 #define Sglext_xortointp1(left,right,result) S
407 #define Sglext_xorfromintp1(left,right,result)
408 Sgl_xorfromintp1(left,right,result)
409 #define Sglext_copytoint_exponentmantissa(src,
410 Sgl_copytoint_exponentmantissa(src,des
411 #define Sglext_ismagnitudeless(signlessleft,si
412 Sgl_ismagnitudeless(signlessleft,signl
413
414 #define Sglext_set_sign(dbl_value,sign) Sgl_s
415 #define Sglext_clear_signexponent_set_hidden(s
416 Sgl_clear_signexponent_set_hidden(srcd
417 #define Sglext_clear_signexponent(srcdst) Sgl_
418 #define Sglext_clear_sign(srcdst) Sgl_clear_si
419 #define Sglext_isone_hidden(dbl_value) Sgl_iso
420
421 #define Sglext_denormalize(opndp1,opndp2,expon
422 {int sticky;
423 is_tiny = TRUE;
424 if (exponent == 0 && Sextallp2(opndp2)) {
425 switch (Rounding_mode()) {
426 case ROUNDPLUS:
427 if (Sgl_iszero_sign(opndp1))
428 if (Sgl_isone_hiddenov
429 is_tiny = FALS
430 break;
431 case ROUNDMINUS:
432 if (Sgl_isone_sign(opndp1)) {
433 if (Sgl_isone_hiddenov
434 is_tiny = FALS
435 }
436 break;
437 case ROUNDNEAREST:
438 if (Sglext_isone_highp2(opndp2
439 (Sglext_isone_lowp1(opndp1
440 Sglext_isnotzero_low31p2(
441 if (Sgl_isone_hiddenov
442 is_tiny = FALS
443 break;
444 }
445 }
446 Sglext_clear_signexponent_set_hidden(opndp
447 if (exponent >= (1-DBL_P)) {
448 if (exponent >= -31) {
449 if (exponent > -31) {
450 sticky = Sextallp2(opndp2) <<
451 Variable_shift_double(opndp1,o
452 Sextallp1(opndp1) >>= 1-expone
453 }
454 else {
455 sticky = Sextallp2(opndp2);
456 Sextallp2(opndp2) = Sextallp1(
457 Sextallp1(opndp1) = 0;
458 }
459 }
460 else {
461 sticky = (Sextallp1(opndp1) << 31+
462 Sextallp2(opndp2);
463 Sextallp2(opndp2) = Sextallp1(opnd
464 Sextallp1(opndp1) = 0;
465 }
466 }
467 else {
468 sticky = Sextallp1(opndp1) | Sextallp2
469 Sglext_setzero(opndp1,opndp2);
470 }
471 if (sticky) Sglext_setone_lowmantissap2(op
472 exponent = 0;
473 }
474
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