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1da177e4 LT |
1 | /* |
2 | * Linux/PA-RISC Project (http://www.parisc-linux.org/) | |
3 | * | |
4 | * Floating-point emulation code | |
5 | * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> | |
6 | * | |
7 | * This program 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) | |
10 | * any later version. | |
11 | * | |
12 | * This program 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. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #ifdef __NO_PA_HDRS | |
23 | PA header file -- do not include this header file for non-PA builds. | |
24 | #endif | |
25 | ||
7022672e | 26 | /* 32-bit word grabbing functions */ |
1da177e4 LT |
27 | #define Sgl_firstword(value) Sall(value) |
28 | #define Sgl_secondword(value) dummy_location | |
29 | #define Sgl_thirdword(value) dummy_location | |
30 | #define Sgl_fourthword(value) dummy_location | |
31 | ||
32 | #define Sgl_sign(object) Ssign(object) | |
33 | #define Sgl_exponent(object) Sexponent(object) | |
34 | #define Sgl_signexponent(object) Ssignexponent(object) | |
35 | #define Sgl_mantissa(object) Smantissa(object) | |
36 | #define Sgl_exponentmantissa(object) Sexponentmantissa(object) | |
37 | #define Sgl_all(object) Sall(object) | |
38 | ||
7022672e | 39 | /* sgl_and_signs ANDs the sign bits of each argument and puts the result |
1da177e4 LT |
40 | * into the first argument. sgl_or_signs ors those same sign bits */ |
41 | #define Sgl_and_signs( src1dst, src2) \ | |
42 | Sall(src1dst) = (Sall(src2)|~((unsigned int)1<<31)) & Sall(src1dst) | |
43 | #define Sgl_or_signs( src1dst, src2) \ | |
44 | Sall(src1dst) = (Sall(src2)&((unsigned int)1<<31)) | Sall(src1dst) | |
45 | ||
46 | /* The hidden bit is always the low bit of the exponent */ | |
47 | #define Sgl_clear_exponent_set_hidden(srcdst) Deposit_sexponent(srcdst,1) | |
48 | #define Sgl_clear_signexponent_set_hidden(srcdst) \ | |
49 | Deposit_ssignexponent(srcdst,1) | |
50 | #define Sgl_clear_sign(srcdst) Sall(srcdst) &= ~((unsigned int)1<<31) | |
51 | #define Sgl_clear_signexponent(srcdst) Sall(srcdst) &= 0x007fffff | |
52 | ||
53 | /* varamount must be less than 32 for the next three functions */ | |
54 | #define Sgl_rightshift(srcdst, varamount) \ | |
55 | Sall(srcdst) >>= varamount | |
56 | #define Sgl_leftshift(srcdst, varamount) \ | |
57 | Sall(srcdst) <<= varamount | |
58 | #define Sgl_rightshift_exponentmantissa(srcdst, varamount) \ | |
59 | Sall(srcdst) = \ | |
60 | (Sexponentmantissa(srcdst) >> varamount) | \ | |
61 | (Sall(srcdst) & ((unsigned int)1<<31)) | |
62 | ||
63 | #define Sgl_leftshiftby1_withextent(left,right,result) \ | |
64 | Shiftdouble(Sall(left),Extall(right),31,Sall(result)) | |
65 | ||
66 | #define Sgl_rightshiftby1_withextent(left,right,dst) \ | |
67 | Shiftdouble(Sall(left),Extall(right),1,Extall(right)) | |
68 | #define Sgl_arithrightshiftby1(srcdst) \ | |
69 | Sall(srcdst) = (int)Sall(srcdst) >> 1 | |
70 | ||
71 | /* Sign extend the sign bit with an integer destination */ | |
72 | #define Sgl_signextendedsign(value) Ssignedsign(value) | |
73 | ||
74 | #define Sgl_isone_hidden(sgl_value) (Shidden(sgl_value)) | |
75 | #define Sgl_increment(sgl_value) Sall(sgl_value) += 1 | |
76 | #define Sgl_increment_mantissa(sgl_value) \ | |
77 | Deposit_smantissa(sgl_value,sgl_value+1) | |
78 | #define Sgl_decrement(sgl_value) Sall(sgl_value) -= 1 | |
79 | ||
80 | #define Sgl_isone_sign(sgl_value) (Is_ssign(sgl_value)!=0) | |
81 | #define Sgl_isone_hiddenoverflow(sgl_value) \ | |
82 | (Is_shiddenoverflow(sgl_value)!=0) | |
83 | #define Sgl_isone_lowmantissa(sgl_value) (Is_slow(sgl_value)!=0) | |
84 | #define Sgl_isone_signaling(sgl_value) (Is_ssignaling(sgl_value)!=0) | |
85 | #define Sgl_is_signalingnan(sgl_value) (Ssignalingnan(sgl_value)==0x1ff) | |
86 | #define Sgl_isnotzero(sgl_value) (Sall(sgl_value)!=0) | |
87 | #define Sgl_isnotzero_hiddenhigh7mantissa(sgl_value) \ | |
88 | (Shiddenhigh7mantissa(sgl_value)!=0) | |
89 | #define Sgl_isnotzero_low4(sgl_value) (Slow4(sgl_value)!=0) | |
90 | #define Sgl_isnotzero_exponent(sgl_value) (Sexponent(sgl_value)!=0) | |
91 | #define Sgl_isnotzero_mantissa(sgl_value) (Smantissa(sgl_value)!=0) | |
92 | #define Sgl_isnotzero_exponentmantissa(sgl_value) \ | |
93 | (Sexponentmantissa(sgl_value)!=0) | |
94 | #define Sgl_iszero(sgl_value) (Sall(sgl_value)==0) | |
95 | #define Sgl_iszero_signaling(sgl_value) (Is_ssignaling(sgl_value)==0) | |
96 | #define Sgl_iszero_hidden(sgl_value) (Is_shidden(sgl_value)==0) | |
97 | #define Sgl_iszero_hiddenoverflow(sgl_value) \ | |
98 | (Is_shiddenoverflow(sgl_value)==0) | |
99 | #define Sgl_iszero_hiddenhigh3mantissa(sgl_value) \ | |
100 | (Shiddenhigh3mantissa(sgl_value)==0) | |
101 | #define Sgl_iszero_hiddenhigh7mantissa(sgl_value) \ | |
102 | (Shiddenhigh7mantissa(sgl_value)==0) | |
103 | #define Sgl_iszero_sign(sgl_value) (Is_ssign(sgl_value)==0) | |
104 | #define Sgl_iszero_exponent(sgl_value) (Sexponent(sgl_value)==0) | |
105 | #define Sgl_iszero_mantissa(sgl_value) (Smantissa(sgl_value)==0) | |
106 | #define Sgl_iszero_exponentmantissa(sgl_value) \ | |
107 | (Sexponentmantissa(sgl_value)==0) | |
108 | #define Sgl_isinfinity_exponent(sgl_value) \ | |
109 | (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT) | |
110 | #define Sgl_isnotinfinity_exponent(sgl_value) \ | |
111 | (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT) | |
112 | #define Sgl_isinfinity(sgl_value) \ | |
113 | (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \ | |
114 | Sgl_mantissa(sgl_value)==0) | |
115 | #define Sgl_isnan(sgl_value) \ | |
116 | (Sgl_exponent(sgl_value)==SGL_INFINITY_EXPONENT && \ | |
117 | Sgl_mantissa(sgl_value)!=0) | |
118 | #define Sgl_isnotnan(sgl_value) \ | |
119 | (Sgl_exponent(sgl_value)!=SGL_INFINITY_EXPONENT || \ | |
120 | Sgl_mantissa(sgl_value)==0) | |
121 | #define Sgl_islessthan(sgl_op1,sgl_op2) \ | |
122 | (Sall(sgl_op1) < Sall(sgl_op2)) | |
123 | #define Sgl_isgreaterthan(sgl_op1,sgl_op2) \ | |
124 | (Sall(sgl_op1) > Sall(sgl_op2)) | |
125 | #define Sgl_isnotlessthan(sgl_op1,sgl_op2) \ | |
126 | (Sall(sgl_op1) >= Sall(sgl_op2)) | |
127 | #define Sgl_isequal(sgl_op1,sgl_op2) \ | |
128 | (Sall(sgl_op1) == Sall(sgl_op2)) | |
129 | ||
130 | #define Sgl_leftshiftby8(sgl_value) \ | |
131 | Sall(sgl_value) <<= 8 | |
132 | #define Sgl_leftshiftby4(sgl_value) \ | |
133 | Sall(sgl_value) <<= 4 | |
134 | #define Sgl_leftshiftby3(sgl_value) \ | |
135 | Sall(sgl_value) <<= 3 | |
136 | #define Sgl_leftshiftby2(sgl_value) \ | |
137 | Sall(sgl_value) <<= 2 | |
138 | #define Sgl_leftshiftby1(sgl_value) \ | |
139 | Sall(sgl_value) <<= 1 | |
140 | #define Sgl_rightshiftby1(sgl_value) \ | |
141 | Sall(sgl_value) >>= 1 | |
142 | #define Sgl_rightshiftby4(sgl_value) \ | |
143 | Sall(sgl_value) >>= 4 | |
144 | #define Sgl_rightshiftby8(sgl_value) \ | |
145 | Sall(sgl_value) >>= 8 | |
146 | ||
147 | #define Sgl_ismagnitudeless(signlessleft,signlessright) \ | |
148 | /* unsigned int signlessleft, signlessright; */ \ | |
149 | (signlessleft < signlessright) | |
150 | ||
151 | ||
152 | #define Sgl_copytoint_exponentmantissa(source,dest) \ | |
153 | dest = Sexponentmantissa(source) | |
154 | ||
155 | /* A quiet NaN has the high mantissa bit clear and at least on other (in this | |
156 | * case the adjacent bit) bit set. */ | |
157 | #define Sgl_set_quiet(sgl_value) Deposit_shigh2mantissa(sgl_value,1) | |
158 | #define Sgl_set_exponent(sgl_value,exp) Deposit_sexponent(sgl_value,exp) | |
159 | ||
160 | #define Sgl_set_mantissa(dest,value) Deposit_smantissa(dest,value) | |
161 | #define Sgl_set_exponentmantissa(dest,value) \ | |
162 | Deposit_sexponentmantissa(dest,value) | |
163 | ||
164 | /* An infinity is represented with the max exponent and a zero mantissa */ | |
165 | #define Sgl_setinfinity_exponent(sgl_value) \ | |
166 | Deposit_sexponent(sgl_value,SGL_INFINITY_EXPONENT) | |
167 | #define Sgl_setinfinity_exponentmantissa(sgl_value) \ | |
168 | Deposit_sexponentmantissa(sgl_value, \ | |
169 | (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH)))) | |
170 | #define Sgl_setinfinitypositive(sgl_value) \ | |
171 | Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | |
172 | #define Sgl_setinfinitynegative(sgl_value) \ | |
173 | Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) \ | |
174 | | ((unsigned int)1<<31) | |
175 | #define Sgl_setinfinity(sgl_value,sign) \ | |
176 | Sall(sgl_value) = (SGL_INFINITY_EXPONENT << (32-(1+SGL_EXP_LENGTH))) | \ | |
177 | ((unsigned int)sign << 31) | |
178 | #define Sgl_sethigh4bits(sgl_value, extsign) \ | |
179 | Deposit_shigh4(sgl_value,extsign) | |
180 | #define Sgl_set_sign(sgl_value,sign) Deposit_ssign(sgl_value,sign) | |
181 | #define Sgl_invert_sign(sgl_value) \ | |
182 | Deposit_ssign(sgl_value,~Ssign(sgl_value)) | |
183 | #define Sgl_setone_sign(sgl_value) Deposit_ssign(sgl_value,1) | |
184 | #define Sgl_setone_lowmantissa(sgl_value) Deposit_slow(sgl_value,1) | |
185 | #define Sgl_setzero_sign(sgl_value) Sall(sgl_value) &= 0x7fffffff | |
186 | #define Sgl_setzero_exponent(sgl_value) Sall(sgl_value) &= 0x807fffff | |
187 | #define Sgl_setzero_mantissa(sgl_value) Sall(sgl_value) &= 0xff800000 | |
188 | #define Sgl_setzero_exponentmantissa(sgl_value) Sall(sgl_value) &= 0x80000000 | |
189 | #define Sgl_setzero(sgl_value) Sall(sgl_value) = 0 | |
190 | #define Sgl_setnegativezero(sgl_value) Sall(sgl_value) = (unsigned int)1 << 31 | |
191 | ||
192 | /* Use following macro for both overflow & underflow conditions */ | |
193 | #define ovfl - | |
194 | #define unfl + | |
195 | #define Sgl_setwrapped_exponent(sgl_value,exponent,op) \ | |
196 | Deposit_sexponent(sgl_value,(exponent op SGL_WRAP)) | |
197 | ||
198 | #define Sgl_setlargestpositive(sgl_value) \ | |
199 | Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | |
200 | | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) | |
201 | #define Sgl_setlargestnegative(sgl_value) \ | |
202 | Sall(sgl_value) = ((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | |
203 | | ((1<<(32-(1+SGL_EXP_LENGTH))) - 1 ) \ | |
204 | | ((unsigned int)1<<31) | |
205 | ||
206 | #define Sgl_setnegativeinfinity(sgl_value) \ | |
207 | Sall(sgl_value) = \ | |
208 | ((1<<SGL_EXP_LENGTH) | SGL_INFINITY_EXPONENT) << (32-(1+SGL_EXP_LENGTH)) | |
209 | #define Sgl_setlargest(sgl_value,sign) \ | |
210 | Sall(sgl_value) = (unsigned int)sign << 31 | \ | |
211 | (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | |
212 | | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 )) | |
213 | #define Sgl_setlargest_exponentmantissa(sgl_value) \ | |
214 | Sall(sgl_value) = Sall(sgl_value) & ((unsigned int)1<<31) | \ | |
215 | (((SGL_EMAX+SGL_BIAS) << (32-(1+SGL_EXP_LENGTH))) \ | |
216 | | ((1 << (32-(1+SGL_EXP_LENGTH))) - 1 )) | |
217 | ||
218 | /* The high bit is always zero so arithmetic or logical shifts will work. */ | |
219 | #define Sgl_right_align(srcdst,shift,extent) \ | |
220 | /* sgl_floating_point srcdst; int shift; extension extent */ \ | |
221 | if (shift < 32) { \ | |
222 | Extall(extent) = Sall(srcdst) << (32-(shift)); \ | |
223 | Sall(srcdst) >>= shift; \ | |
224 | } \ | |
225 | else { \ | |
226 | Extall(extent) = Sall(srcdst); \ | |
227 | Sall(srcdst) = 0; \ | |
228 | } | |
229 | #define Sgl_hiddenhigh3mantissa(sgl_value) Shiddenhigh3mantissa(sgl_value) | |
230 | #define Sgl_hidden(sgl_value) Shidden(sgl_value) | |
231 | #define Sgl_lowmantissa(sgl_value) Slow(sgl_value) | |
232 | ||
233 | /* The left argument is never smaller than the right argument */ | |
234 | #define Sgl_subtract(sgl_left,sgl_right,sgl_result) \ | |
235 | Sall(sgl_result) = Sall(sgl_left) - Sall(sgl_right) | |
236 | ||
237 | /* Subtract right augmented with extension from left augmented with zeros and | |
238 | * store into result and extension. */ | |
239 | #define Sgl_subtract_withextension(left,right,extent,result) \ | |
240 | /* sgl_floating_point left,right,result; extension extent */ \ | |
241 | Sgl_subtract(left,right,result); \ | |
242 | if((Extall(extent) = 0-Extall(extent))) \ | |
243 | Sall(result) = Sall(result)-1 | |
244 | ||
245 | #define Sgl_addition(sgl_left,sgl_right,sgl_result) \ | |
246 | Sall(sgl_result) = Sall(sgl_left) + Sall(sgl_right) | |
247 | ||
248 | #define Sgl_xortointp1(left,right,result) \ | |
249 | result = Sall(left) XOR Sall(right); | |
250 | ||
251 | #define Sgl_xorfromintp1(left,right,result) \ | |
252 | Sall(result) = left XOR Sall(right) | |
253 | ||
254 | /* Need to Initialize */ | |
255 | #define Sgl_makequietnan(dest) \ | |
256 | Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \ | |
257 | | (1<<(32-(1+SGL_EXP_LENGTH+2))) | |
258 | #define Sgl_makesignalingnan(dest) \ | |
259 | Sall(dest) = ((SGL_EMAX+SGL_BIAS)+1)<< (32-(1+SGL_EXP_LENGTH)) \ | |
260 | | (1<<(32-(1+SGL_EXP_LENGTH+1))) | |
261 | ||
262 | #define Sgl_normalize(sgl_opnd,exponent) \ | |
263 | while(Sgl_iszero_hiddenhigh7mantissa(sgl_opnd)) { \ | |
264 | Sgl_leftshiftby8(sgl_opnd); \ | |
265 | exponent -= 8; \ | |
266 | } \ | |
267 | if(Sgl_iszero_hiddenhigh3mantissa(sgl_opnd)) { \ | |
268 | Sgl_leftshiftby4(sgl_opnd); \ | |
269 | exponent -= 4; \ | |
270 | } \ | |
271 | while(Sgl_iszero_hidden(sgl_opnd)) { \ | |
272 | Sgl_leftshiftby1(sgl_opnd); \ | |
273 | exponent -= 1; \ | |
274 | } | |
275 | ||
276 | #define Sgl_setoverflow(sgl_opnd) \ | |
277 | /* set result to infinity or largest number */ \ | |
278 | switch (Rounding_mode()) { \ | |
279 | case ROUNDPLUS: \ | |
280 | if (Sgl_isone_sign(sgl_opnd)) { \ | |
281 | Sgl_setlargestnegative(sgl_opnd); \ | |
282 | } \ | |
283 | else { \ | |
284 | Sgl_setinfinitypositive(sgl_opnd); \ | |
285 | } \ | |
286 | break; \ | |
287 | case ROUNDMINUS: \ | |
288 | if (Sgl_iszero_sign(sgl_opnd)) { \ | |
289 | Sgl_setlargestpositive(sgl_opnd); \ | |
290 | } \ | |
291 | else { \ | |
292 | Sgl_setinfinitynegative(sgl_opnd); \ | |
293 | } \ | |
294 | break; \ | |
295 | case ROUNDNEAREST: \ | |
296 | Sgl_setinfinity_exponentmantissa(sgl_opnd); \ | |
297 | break; \ | |
298 | case ROUNDZERO: \ | |
299 | Sgl_setlargest_exponentmantissa(sgl_opnd); \ | |
300 | } | |
301 | ||
302 | #define Sgl_denormalize(opnd,exponent,guard,sticky,inexact) \ | |
303 | Sgl_clear_signexponent_set_hidden(opnd); \ | |
304 | if (exponent >= (1 - SGL_P)) { \ | |
305 | guard = (Sall(opnd) >> -exponent) & 1; \ | |
306 | if (exponent < 0) sticky |= Sall(opnd) << (32+exponent); \ | |
307 | inexact = guard | sticky; \ | |
308 | Sall(opnd) >>= (1-exponent); \ | |
309 | } \ | |
310 | else { \ | |
311 | guard = 0; \ | |
312 | sticky |= Sall(opnd); \ | |
313 | inexact = sticky; \ | |
314 | Sgl_setzero(opnd); \ | |
315 | } | |
316 | ||
317 | /* | |
318 | * The fused multiply add instructions requires a single extended format, | |
319 | * with 48 bits of mantissa. | |
320 | */ | |
321 | #define SGLEXT_THRESHOLD 48 | |
322 | ||
323 | #define Sglext_setzero(valA,valB) \ | |
324 | Sextallp1(valA) = 0; Sextallp2(valB) = 0 | |
325 | ||
326 | #define Sglext_isnotzero_mantissap2(valB) (Sextallp2(valB)!=0) | |
327 | #define Sglext_isone_lowp1(val) (Sextlowp1(val)!=0) | |
328 | #define Sglext_isone_highp2(val) (Sexthighp2(val)!=0) | |
329 | #define Sglext_isnotzero_low31p2(val) (Sextlow31p2(val)!=0) | |
330 | #define Sglext_iszero(valA,valB) (Sextallp1(valA)==0 && Sextallp2(valB)==0) | |
331 | ||
332 | #define Sgl_copytoptr(src,destptr) *destptr = src | |
333 | #define Sgl_copyfromptr(srcptr,dest) dest = *srcptr | |
334 | #define Sglext_copy(srca,srcb,desta,destb) \ | |
335 | Sextallp1(desta) = Sextallp1(srca); \ | |
336 | Sextallp2(destb) = Sextallp2(srcb) | |
337 | #define Sgl_copyto_sglext(src1,dest1,dest2) \ | |
338 | Sextallp1(dest1) = Sall(src1); Sextallp2(dest2) = 0 | |
339 | ||
340 | #define Sglext_swap_lower(leftp2,rightp2) \ | |
341 | Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \ | |
342 | Sextallp2(rightp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2); \ | |
343 | Sextallp2(leftp2) = Sextallp2(leftp2) XOR Sextallp2(rightp2) | |
344 | ||
345 | #define Sglext_setone_lowmantissap2(value) Deposit_dlowp2(value,1) | |
346 | ||
347 | /* The high bit is always zero so arithmetic or logical shifts will work. */ | |
348 | #define Sglext_right_align(srcdstA,srcdstB,shift) \ | |
349 | {int shiftamt, sticky; \ | |
350 | shiftamt = shift % 32; \ | |
351 | sticky = 0; \ | |
352 | switch (shift/32) { \ | |
353 | case 0: if (shiftamt > 0) { \ | |
354 | sticky = Sextallp2(srcdstB) << 32 - (shiftamt); \ | |
355 | Variable_shift_double(Sextallp1(srcdstA), \ | |
356 | Sextallp2(srcdstB),shiftamt,Sextallp2(srcdstB)); \ | |
357 | Sextallp1(srcdstA) >>= shiftamt; \ | |
358 | } \ | |
359 | break; \ | |
360 | case 1: if (shiftamt > 0) { \ | |
361 | sticky = (Sextallp1(srcdstA) << 32 - (shiftamt)) | \ | |
362 | Sextallp2(srcdstB); \ | |
363 | } \ | |
364 | else { \ | |
365 | sticky = Sextallp2(srcdstB); \ | |
366 | } \ | |
367 | Sextallp2(srcdstB) = Sextallp1(srcdstA) >> shiftamt; \ | |
368 | Sextallp1(srcdstA) = 0; \ | |
369 | break; \ | |
370 | } \ | |
371 | if (sticky) Sglext_setone_lowmantissap2(srcdstB); \ | |
372 | } | |
373 | ||
374 | /* The left argument is never smaller than the right argument */ | |
375 | #define Sglext_subtract(lefta,leftb,righta,rightb,resulta,resultb) \ | |
376 | if( Sextallp2(rightb) > Sextallp2(leftb) ) Sextallp1(lefta)--; \ | |
377 | Sextallp2(resultb) = Sextallp2(leftb) - Sextallp2(rightb); \ | |
378 | Sextallp1(resulta) = Sextallp1(lefta) - Sextallp1(righta) | |
379 | ||
380 | #define Sglext_addition(lefta,leftb,righta,rightb,resulta,resultb) \ | |
381 | /* If the sum of the low words is less than either source, then \ | |
382 | * an overflow into the next word occurred. */ \ | |
383 | if ((Sextallp2(resultb) = Sextallp2(leftb)+Sextallp2(rightb)) < \ | |
384 | Sextallp2(rightb)) \ | |
385 | Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta)+1; \ | |
386 | else Sextallp1(resulta) = Sextallp1(lefta)+Sextallp1(righta) | |
387 | ||
388 | ||
389 | #define Sglext_arithrightshiftby1(srcdstA,srcdstB) \ | |
390 | Shiftdouble(Sextallp1(srcdstA),Sextallp2(srcdstB),1,Sextallp2(srcdstB)); \ | |
391 | Sextallp1(srcdstA) = (int)Sextallp1(srcdstA) >> 1 | |
392 | ||
393 | #define Sglext_leftshiftby8(valA,valB) \ | |
394 | Shiftdouble(Sextallp1(valA),Sextallp2(valB),24,Sextallp1(valA)); \ | |
395 | Sextallp2(valB) <<= 8 | |
396 | #define Sglext_leftshiftby4(valA,valB) \ | |
397 | Shiftdouble(Sextallp1(valA),Sextallp2(valB),28,Sextallp1(valA)); \ | |
398 | Sextallp2(valB) <<= 4 | |
399 | #define Sglext_leftshiftby3(valA,valB) \ | |
400 | Shiftdouble(Sextallp1(valA),Sextallp2(valB),29,Sextallp1(valA)); \ | |
401 | Sextallp2(valB) <<= 3 | |
402 | #define Sglext_leftshiftby2(valA,valB) \ | |
403 | Shiftdouble(Sextallp1(valA),Sextallp2(valB),30,Sextallp1(valA)); \ | |
404 | Sextallp2(valB) <<= 2 | |
405 | #define Sglext_leftshiftby1(valA,valB) \ | |
406 | Shiftdouble(Sextallp1(valA),Sextallp2(valB),31,Sextallp1(valA)); \ | |
407 | Sextallp2(valB) <<= 1 | |
408 | ||
409 | #define Sglext_rightshiftby4(valueA,valueB) \ | |
410 | Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),4,Sextallp2(valueB)); \ | |
411 | Sextallp1(valueA) >>= 4 | |
412 | #define Sglext_rightshiftby3(valueA,valueB) \ | |
413 | Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),3,Sextallp2(valueB)); \ | |
414 | Sextallp1(valueA) >>= 3 | |
415 | #define Sglext_rightshiftby1(valueA,valueB) \ | |
416 | Shiftdouble(Sextallp1(valueA),Sextallp2(valueB),1,Sextallp2(valueB)); \ | |
417 | Sextallp1(valueA) >>= 1 | |
418 | ||
419 | #define Sglext_xortointp1(left,right,result) Sgl_xortointp1(left,right,result) | |
420 | #define Sglext_xorfromintp1(left,right,result) \ | |
421 | Sgl_xorfromintp1(left,right,result) | |
422 | #define Sglext_copytoint_exponentmantissa(src,dest) \ | |
423 | Sgl_copytoint_exponentmantissa(src,dest) | |
424 | #define Sglext_ismagnitudeless(signlessleft,signlessright) \ | |
425 | Sgl_ismagnitudeless(signlessleft,signlessright) | |
426 | ||
427 | #define Sglext_set_sign(dbl_value,sign) Sgl_set_sign(dbl_value,sign) | |
428 | #define Sglext_clear_signexponent_set_hidden(srcdst) \ | |
429 | Sgl_clear_signexponent_set_hidden(srcdst) | |
430 | #define Sglext_clear_signexponent(srcdst) Sgl_clear_signexponent(srcdst) | |
431 | #define Sglext_clear_sign(srcdst) Sgl_clear_sign(srcdst) | |
432 | #define Sglext_isone_hidden(dbl_value) Sgl_isone_hidden(dbl_value) | |
433 | ||
434 | #define Sglext_denormalize(opndp1,opndp2,exponent,is_tiny) \ | |
435 | {int sticky; \ | |
436 | is_tiny = TRUE; \ | |
437 | if (exponent == 0 && Sextallp2(opndp2)) { \ | |
438 | switch (Rounding_mode()) { \ | |
439 | case ROUNDPLUS: \ | |
440 | if (Sgl_iszero_sign(opndp1)) \ | |
441 | if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ | |
442 | is_tiny = FALSE; \ | |
443 | break; \ | |
444 | case ROUNDMINUS: \ | |
445 | if (Sgl_isone_sign(opndp1)) { \ | |
446 | if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ | |
447 | is_tiny = FALSE; \ | |
448 | } \ | |
449 | break; \ | |
450 | case ROUNDNEAREST: \ | |
451 | if (Sglext_isone_highp2(opndp2) && \ | |
452 | (Sglext_isone_lowp1(opndp1) || \ | |
453 | Sglext_isnotzero_low31p2(opndp2))) \ | |
454 | if (Sgl_isone_hiddenoverflow(opndp1 + 1)) \ | |
455 | is_tiny = FALSE; \ | |
456 | break; \ | |
457 | } \ | |
458 | } \ | |
459 | Sglext_clear_signexponent_set_hidden(opndp1); \ | |
460 | if (exponent >= (1-DBL_P)) { \ | |
461 | if (exponent >= -31) { \ | |
462 | if (exponent > -31) { \ | |
463 | sticky = Sextallp2(opndp2) << 31+exponent; \ | |
464 | Variable_shift_double(opndp1,opndp2,1-exponent,opndp2); \ | |
465 | Sextallp1(opndp1) >>= 1-exponent; \ | |
466 | } \ | |
467 | else { \ | |
468 | sticky = Sextallp2(opndp2); \ | |
469 | Sextallp2(opndp2) = Sextallp1(opndp1); \ | |
470 | Sextallp1(opndp1) = 0; \ | |
471 | } \ | |
472 | } \ | |
473 | else { \ | |
474 | sticky = (Sextallp1(opndp1) << 31+exponent) | \ | |
475 | Sextallp2(opndp2); \ | |
476 | Sextallp2(opndp2) = Sextallp1(opndp1) >> -31-exponent; \ | |
477 | Sextallp1(opndp1) = 0; \ | |
478 | } \ | |
479 | } \ | |
480 | else { \ | |
481 | sticky = Sextallp1(opndp1) | Sextallp2(opndp2); \ | |
482 | Sglext_setzero(opndp1,opndp2); \ | |
483 | } \ | |
484 | if (sticky) Sglext_setone_lowmantissap2(opndp2); \ | |
485 | exponent = 0; \ | |
486 | } |