1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | * Linux/PA-RISC Project (http://www.parisc-linux.org/) |
4 | * |
5 | * Floating-point emulation code |
6 | * Copyright (C) 2001 Hewlett-Packard (Paul Bame) <bame@debian.org> |
7 | */ |
8 | #ifdef __NO_PA_HDRS |
9 | PA header file -- do not include this header file for non-PA builds. |
10 | #endif |
11 | |
12 | /* 32-bit word grabbing functions */ |
13 | #define Dbl_firstword(value) Dallp1(value) |
14 | #define Dbl_secondword(value) Dallp2(value) |
15 | #define Dbl_thirdword(value) dummy_location |
16 | #define Dbl_fourthword(value) dummy_location |
17 | |
18 | #define Dbl_sign(object) Dsign(object) |
19 | #define Dbl_exponent(object) Dexponent(object) |
20 | #define Dbl_signexponent(object) Dsignexponent(object) |
21 | #define Dbl_mantissap1(object) Dmantissap1(object) |
22 | #define Dbl_mantissap2(object) Dmantissap2(object) |
23 | #define Dbl_exponentmantissap1(object) Dexponentmantissap1(object) |
24 | #define Dbl_allp1(object) Dallp1(object) |
25 | #define Dbl_allp2(object) Dallp2(object) |
26 | |
27 | /* dbl_and_signs ANDs the sign bits of each argument and puts the result |
28 | * into the first argument. dbl_or_signs ors those same sign bits */ |
29 | #define Dbl_and_signs( src1dst, src2) \ |
30 | Dallp1(src1dst) = (Dallp1(src2)|~((unsigned int)1<<31)) & Dallp1(src1dst) |
31 | #define Dbl_or_signs( src1dst, src2) \ |
32 | Dallp1(src1dst) = (Dallp1(src2)&((unsigned int)1<<31)) | Dallp1(src1dst) |
33 | |
34 | /* The hidden bit is always the low bit of the exponent */ |
35 | #define Dbl_clear_exponent_set_hidden(srcdst) Deposit_dexponent(srcdst,1) |
36 | #define Dbl_clear_signexponent_set_hidden(srcdst) \ |
37 | Deposit_dsignexponent(srcdst,1) |
38 | #define Dbl_clear_sign(srcdst) Dallp1(srcdst) &= ~((unsigned int)1<<31) |
39 | #define Dbl_clear_signexponent(srcdst) \ |
40 | Dallp1(srcdst) &= Dmantissap1((unsigned int)-1) |
41 | |
42 | /* Exponent field for doubles has already been cleared and may be |
43 | * included in the shift. Here we need to generate two double width |
44 | * variable shifts. The insignificant bits can be ignored. |
45 | * MTSAR f(varamount) |
46 | * VSHD srcdst.high,srcdst.low => srcdst.low |
47 | * VSHD 0,srcdst.high => srcdst.high |
48 | * This is very difficult to model with C expressions since the shift amount |
49 | * could exceed 32. */ |
50 | /* varamount must be less than 64 */ |
51 | #define Dbl_rightshift(srcdstA, srcdstB, varamount) \ |
52 | {if((varamount) >= 32) { \ |
53 | Dallp2(srcdstB) = Dallp1(srcdstA) >> (varamount-32); \ |
54 | Dallp1(srcdstA)=0; \ |
55 | } \ |
56 | else if(varamount > 0) { \ |
57 | Variable_shift_double(Dallp1(srcdstA), Dallp2(srcdstB), \ |
58 | (varamount), Dallp2(srcdstB)); \ |
59 | Dallp1(srcdstA) >>= varamount; \ |
60 | } } |
61 | /* varamount must be less than 64 */ |
62 | #define Dbl_rightshift_exponentmantissa(srcdstA, srcdstB, varamount) \ |
63 | {if((varamount) >= 32) { \ |
64 | Dallp2(srcdstB) = Dexponentmantissap1(srcdstA) >> (varamount-32); \ |
65 | Dallp1(srcdstA) &= ((unsigned int)1<<31); /* clear expmant field */ \ |
66 | } \ |
67 | else if(varamount > 0) { \ |
68 | Variable_shift_double(Dexponentmantissap1(srcdstA), Dallp2(srcdstB), \ |
69 | (varamount), Dallp2(srcdstB)); \ |
70 | Deposit_dexponentmantissap1(srcdstA, \ |
71 | (Dexponentmantissap1(srcdstA)>>varamount)); \ |
72 | } } |
73 | /* varamount must be less than 64 */ |
74 | #define Dbl_leftshift(srcdstA, srcdstB, varamount) \ |
75 | {if((varamount) >= 32) { \ |
76 | Dallp1(srcdstA) = Dallp2(srcdstB) << (varamount-32); \ |
77 | Dallp2(srcdstB)=0; \ |
78 | } \ |
79 | else { \ |
80 | if ((varamount) > 0) { \ |
81 | Dallp1(srcdstA) = (Dallp1(srcdstA) << (varamount)) | \ |
82 | (Dallp2(srcdstB) >> (32-(varamount))); \ |
83 | Dallp2(srcdstB) <<= varamount; \ |
84 | } \ |
85 | } } |
86 | #define Dbl_leftshiftby1_withextent(lefta,leftb,right,resulta,resultb) \ |
87 | Shiftdouble(Dallp1(lefta), Dallp2(leftb), 31, Dallp1(resulta)); \ |
88 | Shiftdouble(Dallp2(leftb), Extall(right), 31, Dallp2(resultb)) |
89 | |
90 | #define Dbl_rightshiftby1_withextent(leftb,right,dst) \ |
91 | Extall(dst) = (Dallp2(leftb) << 31) | ((unsigned int)Extall(right) >> 1) | \ |
92 | Extlow(right) |
93 | |
94 | #define Dbl_arithrightshiftby1(srcdstA,srcdstB) \ |
95 | Shiftdouble(Dallp1(srcdstA),Dallp2(srcdstB),1,Dallp2(srcdstB));\ |
96 | Dallp1(srcdstA) = (int)Dallp1(srcdstA) >> 1 |
97 | |
98 | /* Sign extend the sign bit with an integer destination */ |
99 | #define Dbl_signextendedsign(value) Dsignedsign(value) |
100 | |
101 | #define Dbl_isone_hidden(dbl_value) (Is_dhidden(dbl_value)!=0) |
102 | /* Singles and doubles may include the sign and exponent fields. The |
103 | * hidden bit and the hidden overflow must be included. */ |
104 | #define Dbl_increment(dbl_valueA,dbl_valueB) \ |
105 | if( (Dallp2(dbl_valueB) += 1) == 0 ) Dallp1(dbl_valueA) += 1 |
106 | #define Dbl_increment_mantissa(dbl_valueA,dbl_valueB) \ |
107 | if( (Dmantissap2(dbl_valueB) += 1) == 0 ) \ |
108 | Deposit_dmantissap1(dbl_valueA,dbl_valueA+1) |
109 | #define Dbl_decrement(dbl_valueA,dbl_valueB) \ |
110 | if( Dallp2(dbl_valueB) == 0 ) Dallp1(dbl_valueA) -= 1; \ |
111 | Dallp2(dbl_valueB) -= 1 |
112 | |
113 | #define Dbl_isone_sign(dbl_value) (Is_dsign(dbl_value)!=0) |
114 | #define Dbl_isone_hiddenoverflow(dbl_value) (Is_dhiddenoverflow(dbl_value)!=0) |
115 | #define Dbl_isone_lowmantissap1(dbl_valueA) (Is_dlowp1(dbl_valueA)!=0) |
116 | #define Dbl_isone_lowmantissap2(dbl_valueB) (Is_dlowp2(dbl_valueB)!=0) |
117 | #define Dbl_isone_signaling(dbl_value) (Is_dsignaling(dbl_value)!=0) |
118 | #define Dbl_is_signalingnan(dbl_value) (Dsignalingnan(dbl_value)==0xfff) |
119 | #define Dbl_isnotzero(dbl_valueA,dbl_valueB) \ |
120 | (Dallp1(dbl_valueA) || Dallp2(dbl_valueB)) |
121 | #define Dbl_isnotzero_hiddenhigh7mantissa(dbl_value) \ |
122 | (Dhiddenhigh7mantissa(dbl_value)!=0) |
123 | #define Dbl_isnotzero_exponent(dbl_value) (Dexponent(dbl_value)!=0) |
124 | #define Dbl_isnotzero_mantissa(dbl_valueA,dbl_valueB) \ |
125 | (Dmantissap1(dbl_valueA) || Dmantissap2(dbl_valueB)) |
126 | #define Dbl_isnotzero_mantissap1(dbl_valueA) (Dmantissap1(dbl_valueA)!=0) |
127 | #define Dbl_isnotzero_mantissap2(dbl_valueB) (Dmantissap2(dbl_valueB)!=0) |
128 | #define Dbl_isnotzero_exponentmantissa(dbl_valueA,dbl_valueB) \ |
129 | (Dexponentmantissap1(dbl_valueA) || Dmantissap2(dbl_valueB)) |
130 | #define Dbl_isnotzero_low4p2(dbl_value) (Dlow4p2(dbl_value)!=0) |
131 | #define Dbl_iszero(dbl_valueA,dbl_valueB) (Dallp1(dbl_valueA)==0 && \ |
132 | Dallp2(dbl_valueB)==0) |
133 | #define Dbl_iszero_allp1(dbl_value) (Dallp1(dbl_value)==0) |
134 | #define Dbl_iszero_allp2(dbl_value) (Dallp2(dbl_value)==0) |
135 | #define Dbl_iszero_hidden(dbl_value) (Is_dhidden(dbl_value)==0) |
136 | #define Dbl_iszero_hiddenoverflow(dbl_value) (Is_dhiddenoverflow(dbl_value)==0) |
137 | #define Dbl_iszero_hiddenhigh3mantissa(dbl_value) \ |
138 | (Dhiddenhigh3mantissa(dbl_value)==0) |
139 | #define Dbl_iszero_hiddenhigh7mantissa(dbl_value) \ |
140 | (Dhiddenhigh7mantissa(dbl_value)==0) |
141 | #define Dbl_iszero_sign(dbl_value) (Is_dsign(dbl_value)==0) |
142 | #define Dbl_iszero_exponent(dbl_value) (Dexponent(dbl_value)==0) |
143 | #define Dbl_iszero_mantissa(dbl_valueA,dbl_valueB) \ |
144 | (Dmantissap1(dbl_valueA)==0 && Dmantissap2(dbl_valueB)==0) |
145 | #define Dbl_iszero_exponentmantissa(dbl_valueA,dbl_valueB) \ |
146 | (Dexponentmantissap1(dbl_valueA)==0 && Dmantissap2(dbl_valueB)==0) |
147 | #define Dbl_isinfinity_exponent(dbl_value) \ |
148 | (Dexponent(dbl_value)==DBL_INFINITY_EXPONENT) |
149 | #define Dbl_isnotinfinity_exponent(dbl_value) \ |
150 | (Dexponent(dbl_value)!=DBL_INFINITY_EXPONENT) |
151 | #define Dbl_isinfinity(dbl_valueA,dbl_valueB) \ |
152 | (Dexponent(dbl_valueA)==DBL_INFINITY_EXPONENT && \ |
153 | Dmantissap1(dbl_valueA)==0 && Dmantissap2(dbl_valueB)==0) |
154 | #define Dbl_isnan(dbl_valueA,dbl_valueB) \ |
155 | (Dexponent(dbl_valueA)==DBL_INFINITY_EXPONENT && \ |
156 | (Dmantissap1(dbl_valueA)!=0 || Dmantissap2(dbl_valueB)!=0)) |
157 | #define Dbl_isnotnan(dbl_valueA,dbl_valueB) \ |
158 | (Dexponent(dbl_valueA)!=DBL_INFINITY_EXPONENT || \ |
159 | (Dmantissap1(dbl_valueA)==0 && Dmantissap2(dbl_valueB)==0)) |
160 | |
161 | #define Dbl_islessthan(dbl_op1a,dbl_op1b,dbl_op2a,dbl_op2b) \ |
162 | (Dallp1(dbl_op1a) < Dallp1(dbl_op2a) || \ |
163 | (Dallp1(dbl_op1a) == Dallp1(dbl_op2a) && \ |
164 | Dallp2(dbl_op1b) < Dallp2(dbl_op2b))) |
165 | #define Dbl_isgreaterthan(dbl_op1a,dbl_op1b,dbl_op2a,dbl_op2b) \ |
166 | (Dallp1(dbl_op1a) > Dallp1(dbl_op2a) || \ |
167 | (Dallp1(dbl_op1a) == Dallp1(dbl_op2a) && \ |
168 | Dallp2(dbl_op1b) > Dallp2(dbl_op2b))) |
169 | #define Dbl_isnotlessthan(dbl_op1a,dbl_op1b,dbl_op2a,dbl_op2b) \ |
170 | (Dallp1(dbl_op1a) > Dallp1(dbl_op2a) || \ |
171 | (Dallp1(dbl_op1a) == Dallp1(dbl_op2a) && \ |
172 | Dallp2(dbl_op1b) >= Dallp2(dbl_op2b))) |
173 | #define Dbl_isnotgreaterthan(dbl_op1a,dbl_op1b,dbl_op2a,dbl_op2b) \ |
174 | (Dallp1(dbl_op1a) < Dallp1(dbl_op2a) || \ |
175 | (Dallp1(dbl_op1a) == Dallp1(dbl_op2a) && \ |
176 | Dallp2(dbl_op1b) <= Dallp2(dbl_op2b))) |
177 | #define Dbl_isequal(dbl_op1a,dbl_op1b,dbl_op2a,dbl_op2b) \ |
178 | ((Dallp1(dbl_op1a) == Dallp1(dbl_op2a)) && \ |
179 | (Dallp2(dbl_op1b) == Dallp2(dbl_op2b))) |
180 | |
181 | #define Dbl_leftshiftby8(dbl_valueA,dbl_valueB) \ |
182 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),24,Dallp1(dbl_valueA)); \ |
183 | Dallp2(dbl_valueB) <<= 8 |
184 | #define Dbl_leftshiftby7(dbl_valueA,dbl_valueB) \ |
185 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),25,Dallp1(dbl_valueA)); \ |
186 | Dallp2(dbl_valueB) <<= 7 |
187 | #define Dbl_leftshiftby4(dbl_valueA,dbl_valueB) \ |
188 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),28,Dallp1(dbl_valueA)); \ |
189 | Dallp2(dbl_valueB) <<= 4 |
190 | #define Dbl_leftshiftby3(dbl_valueA,dbl_valueB) \ |
191 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),29,Dallp1(dbl_valueA)); \ |
192 | Dallp2(dbl_valueB) <<= 3 |
193 | #define Dbl_leftshiftby2(dbl_valueA,dbl_valueB) \ |
194 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),30,Dallp1(dbl_valueA)); \ |
195 | Dallp2(dbl_valueB) <<= 2 |
196 | #define Dbl_leftshiftby1(dbl_valueA,dbl_valueB) \ |
197 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),31,Dallp1(dbl_valueA)); \ |
198 | Dallp2(dbl_valueB) <<= 1 |
199 | |
200 | #define Dbl_rightshiftby8(dbl_valueA,dbl_valueB) \ |
201 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),8,Dallp2(dbl_valueB)); \ |
202 | Dallp1(dbl_valueA) >>= 8 |
203 | #define Dbl_rightshiftby4(dbl_valueA,dbl_valueB) \ |
204 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),4,Dallp2(dbl_valueB)); \ |
205 | Dallp1(dbl_valueA) >>= 4 |
206 | #define Dbl_rightshiftby2(dbl_valueA,dbl_valueB) \ |
207 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),2,Dallp2(dbl_valueB)); \ |
208 | Dallp1(dbl_valueA) >>= 2 |
209 | #define Dbl_rightshiftby1(dbl_valueA,dbl_valueB) \ |
210 | Shiftdouble(Dallp1(dbl_valueA),Dallp2(dbl_valueB),1,Dallp2(dbl_valueB)); \ |
211 | Dallp1(dbl_valueA) >>= 1 |
212 | |
213 | /* This magnitude comparison uses the signless first words and |
214 | * the regular part2 words. The comparison is graphically: |
215 | * |
216 | * 1st greater? ------------- |
217 | * | |
218 | * 1st less?-----------------+--------- |
219 | * | | |
220 | * 2nd greater or equal----->| | |
221 | * False True |
222 | */ |
223 | #define Dbl_ismagnitudeless(leftB,rightB,signlessleft,signlessright) \ |
224 | ((signlessleft <= signlessright) && \ |
225 | ( (signlessleft < signlessright) || (Dallp2(leftB)<Dallp2(rightB)) )) |
226 | |
227 | #define Dbl_copytoint_exponentmantissap1(src,dest) \ |
228 | dest = Dexponentmantissap1(src) |
229 | |
230 | /* A quiet NaN has the high mantissa bit clear and at least on other (in this |
231 | * case the adjacent bit) bit set. */ |
232 | #define Dbl_set_quiet(dbl_value) Deposit_dhigh2mantissa(dbl_value,1) |
233 | #define Dbl_set_exponent(dbl_value, exp) Deposit_dexponent(dbl_value,exp) |
234 | |
235 | #define Dbl_set_mantissa(desta,destb,valuea,valueb) \ |
236 | Deposit_dmantissap1(desta,valuea); \ |
237 | Dmantissap2(destb) = Dmantissap2(valueb) |
238 | #define Dbl_set_mantissap1(desta,valuea) \ |
239 | Deposit_dmantissap1(desta,valuea) |
240 | #define Dbl_set_mantissap2(destb,valueb) \ |
241 | Dmantissap2(destb) = Dmantissap2(valueb) |
242 | |
243 | #define Dbl_set_exponentmantissa(desta,destb,valuea,valueb) \ |
244 | Deposit_dexponentmantissap1(desta,valuea); \ |
245 | Dmantissap2(destb) = Dmantissap2(valueb) |
246 | #define Dbl_set_exponentmantissap1(dest,value) \ |
247 | Deposit_dexponentmantissap1(dest,value) |
248 | |
249 | #define Dbl_copyfromptr(src,desta,destb) \ |
250 | Dallp1(desta) = src->wd0; \ |
251 | Dallp2(destb) = src->wd1 |
252 | #define Dbl_copytoptr(srca,srcb,dest) \ |
253 | dest->wd0 = Dallp1(srca); \ |
254 | dest->wd1 = Dallp2(srcb) |
255 | |
256 | /* An infinity is represented with the max exponent and a zero mantissa */ |
257 | #define Dbl_setinfinity_exponent(dbl_value) \ |
258 | Deposit_dexponent(dbl_value,DBL_INFINITY_EXPONENT) |
259 | #define Dbl_setinfinity_exponentmantissa(dbl_valueA,dbl_valueB) \ |
260 | Deposit_dexponentmantissap1(dbl_valueA, \ |
261 | (DBL_INFINITY_EXPONENT << (32-(1+DBL_EXP_LENGTH)))); \ |
262 | Dmantissap2(dbl_valueB) = 0 |
263 | #define Dbl_setinfinitypositive(dbl_valueA,dbl_valueB) \ |
264 | Dallp1(dbl_valueA) \ |
265 | = (DBL_INFINITY_EXPONENT << (32-(1+DBL_EXP_LENGTH))); \ |
266 | Dmantissap2(dbl_valueB) = 0 |
267 | #define Dbl_setinfinitynegative(dbl_valueA,dbl_valueB) \ |
268 | Dallp1(dbl_valueA) = ((unsigned int)1<<31) | \ |
269 | (DBL_INFINITY_EXPONENT << (32-(1+DBL_EXP_LENGTH))); \ |
270 | Dmantissap2(dbl_valueB) = 0 |
271 | #define Dbl_setinfinity(dbl_valueA,dbl_valueB,sign) \ |
272 | Dallp1(dbl_valueA) = ((unsigned int)sign << 31) | \ |
273 | (DBL_INFINITY_EXPONENT << (32-(1+DBL_EXP_LENGTH))); \ |
274 | Dmantissap2(dbl_valueB) = 0 |
275 | |
276 | #define Dbl_sethigh4bits(dbl_value, extsign) Deposit_dhigh4p1(dbl_value,extsign) |
277 | #define Dbl_set_sign(dbl_value,sign) Deposit_dsign(dbl_value,sign) |
278 | #define Dbl_invert_sign(dbl_value) Deposit_dsign(dbl_value,~Dsign(dbl_value)) |
279 | #define Dbl_setone_sign(dbl_value) Deposit_dsign(dbl_value,1) |
280 | #define Dbl_setone_lowmantissap2(dbl_value) Deposit_dlowp2(dbl_value,1) |
281 | #define Dbl_setzero_sign(dbl_value) Dallp1(dbl_value) &= 0x7fffffff |
282 | #define Dbl_setzero_exponent(dbl_value) \ |
283 | Dallp1(dbl_value) &= 0x800fffff |
284 | #define Dbl_setzero_mantissa(dbl_valueA,dbl_valueB) \ |
285 | Dallp1(dbl_valueA) &= 0xfff00000; \ |
286 | Dallp2(dbl_valueB) = 0 |
287 | #define Dbl_setzero_mantissap1(dbl_value) Dallp1(dbl_value) &= 0xfff00000 |
288 | #define Dbl_setzero_mantissap2(dbl_value) Dallp2(dbl_value) = 0 |
289 | #define Dbl_setzero_exponentmantissa(dbl_valueA,dbl_valueB) \ |
290 | Dallp1(dbl_valueA) &= 0x80000000; \ |
291 | Dallp2(dbl_valueB) = 0 |
292 | #define Dbl_setzero_exponentmantissap1(dbl_valueA) \ |
293 | Dallp1(dbl_valueA) &= 0x80000000 |
294 | #define Dbl_setzero(dbl_valueA,dbl_valueB) \ |
295 | Dallp1(dbl_valueA) = 0; Dallp2(dbl_valueB) = 0 |
296 | #define Dbl_setzerop1(dbl_value) Dallp1(dbl_value) = 0 |
297 | #define Dbl_setzerop2(dbl_value) Dallp2(dbl_value) = 0 |
298 | #define Dbl_setnegativezero(dbl_value) \ |
299 | Dallp1(dbl_value) = (unsigned int)1 << 31; Dallp2(dbl_value) = 0 |
300 | #define Dbl_setnegativezerop1(dbl_value) Dallp1(dbl_value) = (unsigned int)1<<31 |
301 | |
302 | /* Use the following macro for both overflow & underflow conditions */ |
303 | #define ovfl - |
304 | #define unfl + |
305 | #define Dbl_setwrapped_exponent(dbl_value,exponent,op) \ |
306 | Deposit_dexponent(dbl_value,(exponent op DBL_WRAP)) |
307 | |
308 | #define Dbl_setlargestpositive(dbl_valueA,dbl_valueB) \ |
309 | Dallp1(dbl_valueA) = ((DBL_EMAX+DBL_BIAS) << (32-(1+DBL_EXP_LENGTH))) \ |
310 | | ((1<<(32-(1+DBL_EXP_LENGTH))) - 1 ); \ |
311 | Dallp2(dbl_valueB) = 0xFFFFFFFF |
312 | #define Dbl_setlargestnegative(dbl_valueA,dbl_valueB) \ |
313 | Dallp1(dbl_valueA) = ((DBL_EMAX+DBL_BIAS) << (32-(1+DBL_EXP_LENGTH))) \ |
314 | | ((1<<(32-(1+DBL_EXP_LENGTH))) - 1 ) \ |
315 | | ((unsigned int)1<<31); \ |
316 | Dallp2(dbl_valueB) = 0xFFFFFFFF |
317 | #define Dbl_setlargest_exponentmantissa(dbl_valueA,dbl_valueB) \ |
318 | Deposit_dexponentmantissap1(dbl_valueA, \ |
319 | (((DBL_EMAX+DBL_BIAS) << (32-(1+DBL_EXP_LENGTH))) \ |
320 | | ((1<<(32-(1+DBL_EXP_LENGTH))) - 1 ))); \ |
321 | Dallp2(dbl_valueB) = 0xFFFFFFFF |
322 | |
323 | #define Dbl_setnegativeinfinity(dbl_valueA,dbl_valueB) \ |
324 | Dallp1(dbl_valueA) = ((1<<DBL_EXP_LENGTH) | DBL_INFINITY_EXPONENT) \ |
325 | << (32-(1+DBL_EXP_LENGTH)) ; \ |
326 | Dallp2(dbl_valueB) = 0 |
327 | #define Dbl_setlargest(dbl_valueA,dbl_valueB,sign) \ |
328 | Dallp1(dbl_valueA) = ((unsigned int)sign << 31) | \ |
329 | ((DBL_EMAX+DBL_BIAS) << (32-(1+DBL_EXP_LENGTH))) | \ |
330 | ((1 << (32-(1+DBL_EXP_LENGTH))) - 1 ); \ |
331 | Dallp2(dbl_valueB) = 0xFFFFFFFF |
332 | |
333 | |
334 | /* The high bit is always zero so arithmetic or logical shifts will work. */ |
335 | #define Dbl_right_align(srcdstA,srcdstB,shift,extent) \ |
336 | if( shift >= 32 ) \ |
337 | { \ |
338 | /* Big shift requires examining the portion shift off \ |
339 | the end to properly set inexact. */ \ |
340 | if(shift < 64) \ |
341 | { \ |
342 | if(shift > 32) \ |
343 | { \ |
344 | Variable_shift_double(Dallp1(srcdstA),Dallp2(srcdstB), \ |
345 | shift-32, Extall(extent)); \ |
346 | if(Dallp2(srcdstB) << 64 - (shift)) Ext_setone_low(extent); \ |
347 | } \ |
348 | else Extall(extent) = Dallp2(srcdstB); \ |
349 | Dallp2(srcdstB) = Dallp1(srcdstA) >> (shift - 32); \ |
350 | } \ |
351 | else \ |
352 | { \ |
353 | Extall(extent) = Dallp1(srcdstA); \ |
354 | if(Dallp2(srcdstB)) Ext_setone_low(extent); \ |
355 | Dallp2(srcdstB) = 0; \ |
356 | } \ |
357 | Dallp1(srcdstA) = 0; \ |
358 | } \ |
359 | else \ |
360 | { \ |
361 | /* Small alignment is simpler. Extension is easily set. */ \ |
362 | if (shift > 0) \ |
363 | { \ |
364 | Extall(extent) = Dallp2(srcdstB) << 32 - (shift); \ |
365 | Variable_shift_double(Dallp1(srcdstA),Dallp2(srcdstB),shift, \ |
366 | Dallp2(srcdstB)); \ |
367 | Dallp1(srcdstA) >>= shift; \ |
368 | } \ |
369 | else Extall(extent) = 0; \ |
370 | } |
371 | |
372 | /* |
373 | * Here we need to shift the result right to correct for an overshift |
374 | * (due to the exponent becoming negative) during normalization. |
375 | */ |
376 | #define Dbl_fix_overshift(srcdstA,srcdstB,shift,extent) \ |
377 | Extall(extent) = Dallp2(srcdstB) << 32 - (shift); \ |
378 | Dallp2(srcdstB) = (Dallp1(srcdstA) << 32 - (shift)) | \ |
379 | (Dallp2(srcdstB) >> (shift)); \ |
380 | Dallp1(srcdstA) = Dallp1(srcdstA) >> shift |
381 | |
382 | #define Dbl_hiddenhigh3mantissa(dbl_value) Dhiddenhigh3mantissa(dbl_value) |
383 | #define Dbl_hidden(dbl_value) Dhidden(dbl_value) |
384 | #define Dbl_lowmantissap2(dbl_value) Dlowp2(dbl_value) |
385 | |
386 | /* The left argument is never smaller than the right argument */ |
387 | #define Dbl_subtract(lefta,leftb,righta,rightb,resulta,resultb) \ |
388 | if( Dallp2(rightb) > Dallp2(leftb) ) Dallp1(lefta)--; \ |
389 | Dallp2(resultb) = Dallp2(leftb) - Dallp2(rightb); \ |
390 | Dallp1(resulta) = Dallp1(lefta) - Dallp1(righta) |
391 | |
392 | /* Subtract right augmented with extension from left augmented with zeros and |
393 | * store into result and extension. */ |
394 | #define Dbl_subtract_withextension(lefta,leftb,righta,rightb,extent,resulta,resultb) \ |
395 | Dbl_subtract(lefta,leftb,righta,rightb,resulta,resultb); \ |
396 | if( (Extall(extent) = 0-Extall(extent)) ) \ |
397 | { \ |
398 | if((Dallp2(resultb)--) == 0) Dallp1(resulta)--; \ |
399 | } |
400 | |
401 | #define Dbl_addition(lefta,leftb,righta,rightb,resulta,resultb) \ |
402 | /* If the sum of the low words is less than either source, then \ |
403 | * an overflow into the next word occurred. */ \ |
404 | Dallp1(resulta) = Dallp1(lefta) + Dallp1(righta); \ |
405 | if((Dallp2(resultb) = Dallp2(leftb) + Dallp2(rightb)) < Dallp2(rightb)) \ |
406 | Dallp1(resulta)++ |
407 | |
408 | #define Dbl_xortointp1(left,right,result) \ |
409 | result = Dallp1(left) XOR Dallp1(right) |
410 | |
411 | #define Dbl_xorfromintp1(left,right,result) \ |
412 | Dallp1(result) = left XOR Dallp1(right) |
413 | |
414 | #define Dbl_swap_lower(left,right) \ |
415 | Dallp2(left) = Dallp2(left) XOR Dallp2(right); \ |
416 | Dallp2(right) = Dallp2(left) XOR Dallp2(right); \ |
417 | Dallp2(left) = Dallp2(left) XOR Dallp2(right) |
418 | |
419 | /* Need to Initialize */ |
420 | #define Dbl_makequietnan(desta,destb) \ |
421 | Dallp1(desta) = ((DBL_EMAX+DBL_BIAS)+1)<< (32-(1+DBL_EXP_LENGTH)) \ |
422 | | (1<<(32-(1+DBL_EXP_LENGTH+2))); \ |
423 | Dallp2(destb) = 0 |
424 | #define Dbl_makesignalingnan(desta,destb) \ |
425 | Dallp1(desta) = ((DBL_EMAX+DBL_BIAS)+1)<< (32-(1+DBL_EXP_LENGTH)) \ |
426 | | (1<<(32-(1+DBL_EXP_LENGTH+1))); \ |
427 | Dallp2(destb) = 0 |
428 | |
429 | #define Dbl_normalize(dbl_opndA,dbl_opndB,exponent) \ |
430 | while(Dbl_iszero_hiddenhigh7mantissa(dbl_opndA)) { \ |
431 | Dbl_leftshiftby8(dbl_opndA,dbl_opndB); \ |
432 | exponent -= 8; \ |
433 | } \ |
434 | if(Dbl_iszero_hiddenhigh3mantissa(dbl_opndA)) { \ |
435 | Dbl_leftshiftby4(dbl_opndA,dbl_opndB); \ |
436 | exponent -= 4; \ |
437 | } \ |
438 | while(Dbl_iszero_hidden(dbl_opndA)) { \ |
439 | Dbl_leftshiftby1(dbl_opndA,dbl_opndB); \ |
440 | exponent -= 1; \ |
441 | } |
442 | |
443 | #define Twoword_add(src1dstA,src1dstB,src2A,src2B) \ |
444 | /* \ |
445 | * want this macro to generate: \ |
446 | * ADD src1dstB,src2B,src1dstB; \ |
447 | * ADDC src1dstA,src2A,src1dstA; \ |
448 | */ \ |
449 | if ((src1dstB) + (src2B) < (src1dstB)) Dallp1(src1dstA)++; \ |
450 | Dallp1(src1dstA) += (src2A); \ |
451 | Dallp2(src1dstB) += (src2B) |
452 | |
453 | #define Twoword_subtract(src1dstA,src1dstB,src2A,src2B) \ |
454 | /* \ |
455 | * want this macro to generate: \ |
456 | * SUB src1dstB,src2B,src1dstB; \ |
457 | * SUBB src1dstA,src2A,src1dstA; \ |
458 | */ \ |
459 | if ((src1dstB) < (src2B)) Dallp1(src1dstA)--; \ |
460 | Dallp1(src1dstA) -= (src2A); \ |
461 | Dallp2(src1dstB) -= (src2B) |
462 | |
463 | #define Dbl_setoverflow(resultA,resultB) \ |
464 | /* set result to infinity or largest number */ \ |
465 | switch (Rounding_mode()) { \ |
466 | case ROUNDPLUS: \ |
467 | if (Dbl_isone_sign(resultA)) { \ |
468 | Dbl_setlargestnegative(resultA,resultB); \ |
469 | } \ |
470 | else { \ |
471 | Dbl_setinfinitypositive(resultA,resultB); \ |
472 | } \ |
473 | break; \ |
474 | case ROUNDMINUS: \ |
475 | if (Dbl_iszero_sign(resultA)) { \ |
476 | Dbl_setlargestpositive(resultA,resultB); \ |
477 | } \ |
478 | else { \ |
479 | Dbl_setinfinitynegative(resultA,resultB); \ |
480 | } \ |
481 | break; \ |
482 | case ROUNDNEAREST: \ |
483 | Dbl_setinfinity_exponentmantissa(resultA,resultB); \ |
484 | break; \ |
485 | case ROUNDZERO: \ |
486 | Dbl_setlargest_exponentmantissa(resultA,resultB); \ |
487 | } |
488 | |
489 | #define Dbl_denormalize(opndp1,opndp2,exponent,guard,sticky,inexact) \ |
490 | Dbl_clear_signexponent_set_hidden(opndp1); \ |
491 | if (exponent >= (1-DBL_P)) { \ |
492 | if (exponent >= -31) { \ |
493 | guard = (Dallp2(opndp2) >> -exponent) & 1; \ |
494 | if (exponent < 0) sticky |= Dallp2(opndp2) << (32+exponent); \ |
495 | if (exponent > -31) { \ |
496 | Variable_shift_double(opndp1,opndp2,1-exponent,opndp2); \ |
497 | Dallp1(opndp1) >>= 1-exponent; \ |
498 | } \ |
499 | else { \ |
500 | Dallp2(opndp2) = Dallp1(opndp1); \ |
501 | Dbl_setzerop1(opndp1); \ |
502 | } \ |
503 | } \ |
504 | else { \ |
505 | guard = (Dallp1(opndp1) >> -32-exponent) & 1; \ |
506 | if (exponent == -32) sticky |= Dallp2(opndp2); \ |
507 | else sticky |= (Dallp2(opndp2) | Dallp1(opndp1) << 64+exponent); \ |
508 | Dallp2(opndp2) = Dallp1(opndp1) >> -31-exponent; \ |
509 | Dbl_setzerop1(opndp1); \ |
510 | } \ |
511 | inexact = guard | sticky; \ |
512 | } \ |
513 | else { \ |
514 | guard = 0; \ |
515 | sticky |= (Dallp1(opndp1) | Dallp2(opndp2)); \ |
516 | Dbl_setzero(opndp1,opndp2); \ |
517 | inexact = sticky; \ |
518 | } |
519 | |
520 | /* |
521 | * The fused multiply add instructions requires a double extended format, |
522 | * with 106 bits of mantissa. |
523 | */ |
524 | #define DBLEXT_THRESHOLD 106 |
525 | |
526 | #define Dblext_setzero(valA,valB,valC,valD) \ |
527 | Dextallp1(valA) = 0; Dextallp2(valB) = 0; \ |
528 | Dextallp3(valC) = 0; Dextallp4(valD) = 0 |
529 | |
530 | |
531 | #define Dblext_isnotzero_mantissap3(valC) (Dextallp3(valC)!=0) |
532 | #define Dblext_isnotzero_mantissap4(valD) (Dextallp3(valD)!=0) |
533 | #define Dblext_isone_lowp2(val) (Dextlowp2(val)!=0) |
534 | #define Dblext_isone_highp3(val) (Dexthighp3(val)!=0) |
535 | #define Dblext_isnotzero_low31p3(val) (Dextlow31p3(val)!=0) |
536 | #define Dblext_iszero(valA,valB,valC,valD) (Dextallp1(valA)==0 && \ |
537 | Dextallp2(valB)==0 && Dextallp3(valC)==0 && Dextallp4(valD)==0) |
538 | |
539 | #define Dblext_copy(srca,srcb,srcc,srcd,desta,destb,destc,destd) \ |
540 | Dextallp1(desta) = Dextallp4(srca); \ |
541 | Dextallp2(destb) = Dextallp4(srcb); \ |
542 | Dextallp3(destc) = Dextallp4(srcc); \ |
543 | Dextallp4(destd) = Dextallp4(srcd) |
544 | |
545 | #define Dblext_swap_lower(leftp2,leftp3,leftp4,rightp2,rightp3,rightp4) \ |
546 | Dextallp2(leftp2) = Dextallp2(leftp2) XOR Dextallp2(rightp2); \ |
547 | Dextallp2(rightp2) = Dextallp2(leftp2) XOR Dextallp2(rightp2); \ |
548 | Dextallp2(leftp2) = Dextallp2(leftp2) XOR Dextallp2(rightp2); \ |
549 | Dextallp3(leftp3) = Dextallp3(leftp3) XOR Dextallp3(rightp3); \ |
550 | Dextallp3(rightp3) = Dextallp3(leftp3) XOR Dextallp3(rightp3); \ |
551 | Dextallp3(leftp3) = Dextallp3(leftp3) XOR Dextallp3(rightp3); \ |
552 | Dextallp4(leftp4) = Dextallp4(leftp4) XOR Dextallp4(rightp4); \ |
553 | Dextallp4(rightp4) = Dextallp4(leftp4) XOR Dextallp4(rightp4); \ |
554 | Dextallp4(leftp4) = Dextallp4(leftp4) XOR Dextallp4(rightp4) |
555 | |
556 | #define Dblext_setone_lowmantissap4(dbl_value) Deposit_dextlowp4(dbl_value,1) |
557 | |
558 | /* The high bit is always zero so arithmetic or logical shifts will work. */ |
559 | #define Dblext_right_align(srcdstA,srcdstB,srcdstC,srcdstD,shift) \ |
560 | {int shiftamt, sticky; \ |
561 | shiftamt = shift % 32; \ |
562 | sticky = 0; \ |
563 | switch (shift/32) { \ |
564 | case 0: if (shiftamt > 0) { \ |
565 | sticky = Dextallp4(srcdstD) << 32 - (shiftamt); \ |
566 | Variable_shift_double(Dextallp3(srcdstC), \ |
567 | Dextallp4(srcdstD),shiftamt,Dextallp4(srcdstD)); \ |
568 | Variable_shift_double(Dextallp2(srcdstB), \ |
569 | Dextallp3(srcdstC),shiftamt,Dextallp3(srcdstC)); \ |
570 | Variable_shift_double(Dextallp1(srcdstA), \ |
571 | Dextallp2(srcdstB),shiftamt,Dextallp2(srcdstB)); \ |
572 | Dextallp1(srcdstA) >>= shiftamt; \ |
573 | } \ |
574 | break; \ |
575 | case 1: if (shiftamt > 0) { \ |
576 | sticky = (Dextallp3(srcdstC) << 31 - shiftamt) | \ |
577 | Dextallp4(srcdstD); \ |
578 | Variable_shift_double(Dextallp2(srcdstB), \ |
579 | Dextallp3(srcdstC),shiftamt,Dextallp4(srcdstD)); \ |
580 | Variable_shift_double(Dextallp1(srcdstA), \ |
581 | Dextallp2(srcdstB),shiftamt,Dextallp3(srcdstC)); \ |
582 | } \ |
583 | else { \ |
584 | sticky = Dextallp4(srcdstD); \ |
585 | Dextallp4(srcdstD) = Dextallp3(srcdstC); \ |
586 | Dextallp3(srcdstC) = Dextallp2(srcdstB); \ |
587 | } \ |
588 | Dextallp2(srcdstB) = Dextallp1(srcdstA) >> shiftamt; \ |
589 | Dextallp1(srcdstA) = 0; \ |
590 | break; \ |
591 | case 2: if (shiftamt > 0) { \ |
592 | sticky = (Dextallp2(srcdstB) << 31 - shiftamt) | \ |
593 | Dextallp3(srcdstC) | Dextallp4(srcdstD); \ |
594 | Variable_shift_double(Dextallp1(srcdstA), \ |
595 | Dextallp2(srcdstB),shiftamt,Dextallp4(srcdstD)); \ |
596 | } \ |
597 | else { \ |
598 | sticky = Dextallp3(srcdstC) | Dextallp4(srcdstD); \ |
599 | Dextallp4(srcdstD) = Dextallp2(srcdstB); \ |
600 | } \ |
601 | Dextallp3(srcdstC) = Dextallp1(srcdstA) >> shiftamt; \ |
602 | Dextallp1(srcdstA) = Dextallp2(srcdstB) = 0; \ |
603 | break; \ |
604 | case 3: if (shiftamt > 0) { \ |
605 | sticky = (Dextallp1(srcdstA) << 31 - shiftamt) | \ |
606 | Dextallp2(srcdstB) | Dextallp3(srcdstC) | \ |
607 | Dextallp4(srcdstD); \ |
608 | } \ |
609 | else { \ |
610 | sticky = Dextallp2(srcdstB) | Dextallp3(srcdstC) | \ |
611 | Dextallp4(srcdstD); \ |
612 | } \ |
613 | Dextallp4(srcdstD) = Dextallp1(srcdstA) >> shiftamt; \ |
614 | Dextallp1(srcdstA) = Dextallp2(srcdstB) = 0; \ |
615 | Dextallp3(srcdstC) = 0; \ |
616 | break; \ |
617 | } \ |
618 | if (sticky) Dblext_setone_lowmantissap4(srcdstD); \ |
619 | } |
620 | |
621 | /* The left argument is never smaller than the right argument */ |
622 | #define Dblext_subtract(lefta,leftb,leftc,leftd,righta,rightb,rightc,rightd,resulta,resultb,resultc,resultd) \ |
623 | if( Dextallp4(rightd) > Dextallp4(leftd) ) \ |
624 | if( (Dextallp3(leftc)--) == 0) \ |
625 | if( (Dextallp2(leftb)--) == 0) Dextallp1(lefta)--; \ |
626 | Dextallp4(resultd) = Dextallp4(leftd) - Dextallp4(rightd); \ |
627 | if( Dextallp3(rightc) > Dextallp3(leftc) ) \ |
628 | if( (Dextallp2(leftb)--) == 0) Dextallp1(lefta)--; \ |
629 | Dextallp3(resultc) = Dextallp3(leftc) - Dextallp3(rightc); \ |
630 | if( Dextallp2(rightb) > Dextallp2(leftb) ) Dextallp1(lefta)--; \ |
631 | Dextallp2(resultb) = Dextallp2(leftb) - Dextallp2(rightb); \ |
632 | Dextallp1(resulta) = Dextallp1(lefta) - Dextallp1(righta) |
633 | |
634 | #define Dblext_addition(lefta,leftb,leftc,leftd,righta,rightb,rightc,rightd,resulta,resultb,resultc,resultd) \ |
635 | /* If the sum of the low words is less than either source, then \ |
636 | * an overflow into the next word occurred. */ \ |
637 | if ((Dextallp4(resultd) = Dextallp4(leftd)+Dextallp4(rightd)) < \ |
638 | Dextallp4(rightd)) \ |
639 | if((Dextallp3(resultc) = Dextallp3(leftc)+Dextallp3(rightc)+1) <= \ |
640 | Dextallp3(rightc)) \ |
641 | if((Dextallp2(resultb) = Dextallp2(leftb)+Dextallp2(rightb)+1) \ |
642 | <= Dextallp2(rightb)) \ |
643 | Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta)+1; \ |
644 | else Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta); \ |
645 | else \ |
646 | if ((Dextallp2(resultb) = Dextallp2(leftb)+Dextallp2(rightb)) < \ |
647 | Dextallp2(rightb)) \ |
648 | Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta)+1; \ |
649 | else Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta); \ |
650 | else \ |
651 | if ((Dextallp3(resultc) = Dextallp3(leftc)+Dextallp3(rightc)) < \ |
652 | Dextallp3(rightc)) \ |
653 | if ((Dextallp2(resultb) = Dextallp2(leftb)+Dextallp2(rightb)+1) \ |
654 | <= Dextallp2(rightb)) \ |
655 | Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta)+1; \ |
656 | else Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta); \ |
657 | else \ |
658 | if ((Dextallp2(resultb) = Dextallp2(leftb)+Dextallp2(rightb)) < \ |
659 | Dextallp2(rightb)) \ |
660 | Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta)+1; \ |
661 | else Dextallp1(resulta) = Dextallp1(lefta)+Dextallp1(righta) |
662 | |
663 | |
664 | #define Dblext_arithrightshiftby1(srcdstA,srcdstB,srcdstC,srcdstD) \ |
665 | Shiftdouble(Dextallp3(srcdstC),Dextallp4(srcdstD),1,Dextallp4(srcdstD)); \ |
666 | Shiftdouble(Dextallp2(srcdstB),Dextallp3(srcdstC),1,Dextallp3(srcdstC)); \ |
667 | Shiftdouble(Dextallp1(srcdstA),Dextallp2(srcdstB),1,Dextallp2(srcdstB)); \ |
668 | Dextallp1(srcdstA) = (int)Dextallp1(srcdstA) >> 1 |
669 | |
670 | #define Dblext_leftshiftby8(valA,valB,valC,valD) \ |
671 | Shiftdouble(Dextallp1(valA),Dextallp2(valB),24,Dextallp1(valA)); \ |
672 | Shiftdouble(Dextallp2(valB),Dextallp3(valC),24,Dextallp2(valB)); \ |
673 | Shiftdouble(Dextallp3(valC),Dextallp4(valD),24,Dextallp3(valC)); \ |
674 | Dextallp4(valD) <<= 8 |
675 | #define Dblext_leftshiftby4(valA,valB,valC,valD) \ |
676 | Shiftdouble(Dextallp1(valA),Dextallp2(valB),28,Dextallp1(valA)); \ |
677 | Shiftdouble(Dextallp2(valB),Dextallp3(valC),28,Dextallp2(valB)); \ |
678 | Shiftdouble(Dextallp3(valC),Dextallp4(valD),28,Dextallp3(valC)); \ |
679 | Dextallp4(valD) <<= 4 |
680 | #define Dblext_leftshiftby3(valA,valB,valC,valD) \ |
681 | Shiftdouble(Dextallp1(valA),Dextallp2(valB),29,Dextallp1(valA)); \ |
682 | Shiftdouble(Dextallp2(valB),Dextallp3(valC),29,Dextallp2(valB)); \ |
683 | Shiftdouble(Dextallp3(valC),Dextallp4(valD),29,Dextallp3(valC)); \ |
684 | Dextallp4(valD) <<= 3 |
685 | #define Dblext_leftshiftby2(valA,valB,valC,valD) \ |
686 | Shiftdouble(Dextallp1(valA),Dextallp2(valB),30,Dextallp1(valA)); \ |
687 | Shiftdouble(Dextallp2(valB),Dextallp3(valC),30,Dextallp2(valB)); \ |
688 | Shiftdouble(Dextallp3(valC),Dextallp4(valD),30,Dextallp3(valC)); \ |
689 | Dextallp4(valD) <<= 2 |
690 | #define Dblext_leftshiftby1(valA,valB,valC,valD) \ |
691 | Shiftdouble(Dextallp1(valA),Dextallp2(valB),31,Dextallp1(valA)); \ |
692 | Shiftdouble(Dextallp2(valB),Dextallp3(valC),31,Dextallp2(valB)); \ |
693 | Shiftdouble(Dextallp3(valC),Dextallp4(valD),31,Dextallp3(valC)); \ |
694 | Dextallp4(valD) <<= 1 |
695 | |
696 | #define Dblext_rightshiftby4(valueA,valueB,valueC,valueD) \ |
697 | Shiftdouble(Dextallp3(valueC),Dextallp4(valueD),4,Dextallp4(valueD)); \ |
698 | Shiftdouble(Dextallp2(valueB),Dextallp3(valueC),4,Dextallp3(valueC)); \ |
699 | Shiftdouble(Dextallp1(valueA),Dextallp2(valueB),4,Dextallp2(valueB)); \ |
700 | Dextallp1(valueA) >>= 4 |
701 | #define Dblext_rightshiftby1(valueA,valueB,valueC,valueD) \ |
702 | Shiftdouble(Dextallp3(valueC),Dextallp4(valueD),1,Dextallp4(valueD)); \ |
703 | Shiftdouble(Dextallp2(valueB),Dextallp3(valueC),1,Dextallp3(valueC)); \ |
704 | Shiftdouble(Dextallp1(valueA),Dextallp2(valueB),1,Dextallp2(valueB)); \ |
705 | Dextallp1(valueA) >>= 1 |
706 | |
707 | #define Dblext_xortointp1(left,right,result) Dbl_xortointp1(left,right,result) |
708 | |
709 | #define Dblext_xorfromintp1(left,right,result) \ |
710 | Dbl_xorfromintp1(left,right,result) |
711 | |
712 | #define Dblext_copytoint_exponentmantissap1(src,dest) \ |
713 | Dbl_copytoint_exponentmantissap1(src,dest) |
714 | |
715 | #define Dblext_ismagnitudeless(leftB,rightB,signlessleft,signlessright) \ |
716 | Dbl_ismagnitudeless(leftB,rightB,signlessleft,signlessright) |
717 | |
718 | #define Dbl_copyto_dblext(src1,src2,dest1,dest2,dest3,dest4) \ |
719 | Dextallp1(dest1) = Dallp1(src1); Dextallp2(dest2) = Dallp2(src2); \ |
720 | Dextallp3(dest3) = 0; Dextallp4(dest4) = 0 |
721 | |
722 | #define Dblext_set_sign(dbl_value,sign) Dbl_set_sign(dbl_value,sign) |
723 | #define Dblext_clear_signexponent_set_hidden(srcdst) \ |
724 | Dbl_clear_signexponent_set_hidden(srcdst) |
725 | #define Dblext_clear_signexponent(srcdst) Dbl_clear_signexponent(srcdst) |
726 | #define Dblext_clear_sign(srcdst) Dbl_clear_sign(srcdst) |
727 | #define Dblext_isone_hidden(dbl_value) Dbl_isone_hidden(dbl_value) |
728 | |
729 | /* |
730 | * The Fourword_add() macro assumes that integers are 4 bytes in size. |
731 | * It will break if this is not the case. |
732 | */ |
733 | |
734 | #define Fourword_add(src1dstA,src1dstB,src1dstC,src1dstD,src2A,src2B,src2C,src2D) \ |
735 | /* \ |
736 | * want this macro to generate: \ |
737 | * ADD src1dstD,src2D,src1dstD; \ |
738 | * ADDC src1dstC,src2C,src1dstC; \ |
739 | * ADDC src1dstB,src2B,src1dstB; \ |
740 | * ADDC src1dstA,src2A,src1dstA; \ |
741 | */ \ |
742 | if ((unsigned int)(src1dstD += (src2D)) < (unsigned int)(src2D)) { \ |
743 | if ((unsigned int)(src1dstC += (src2C) + 1) <= \ |
744 | (unsigned int)(src2C)) { \ |
745 | if ((unsigned int)(src1dstB += (src2B) + 1) <= \ |
746 | (unsigned int)(src2B)) src1dstA++; \ |
747 | } \ |
748 | else if ((unsigned int)(src1dstB += (src2B)) < \ |
749 | (unsigned int)(src2B)) src1dstA++; \ |
750 | } \ |
751 | else { \ |
752 | if ((unsigned int)(src1dstC += (src2C)) < \ |
753 | (unsigned int)(src2C)) { \ |
754 | if ((unsigned int)(src1dstB += (src2B) + 1) <= \ |
755 | (unsigned int)(src2B)) src1dstA++; \ |
756 | } \ |
757 | else if ((unsigned int)(src1dstB += (src2B)) < \ |
758 | (unsigned int)(src2B)) src1dstA++; \ |
759 | } \ |
760 | src1dstA += (src2A) |
761 | |
762 | #define Dblext_denormalize(opndp1,opndp2,opndp3,opndp4,exponent,is_tiny) \ |
763 | {int shiftamt, sticky; \ |
764 | is_tiny = TRUE; \ |
765 | if (exponent == 0 && (Dextallp3(opndp3) || Dextallp4(opndp4))) { \ |
766 | switch (Rounding_mode()) { \ |
767 | case ROUNDPLUS: \ |
768 | if (Dbl_iszero_sign(opndp1)) { \ |
769 | Dbl_increment(opndp1,opndp2); \ |
770 | if (Dbl_isone_hiddenoverflow(opndp1)) \ |
771 | is_tiny = FALSE; \ |
772 | Dbl_decrement(opndp1,opndp2); \ |
773 | } \ |
774 | break; \ |
775 | case ROUNDMINUS: \ |
776 | if (Dbl_isone_sign(opndp1)) { \ |
777 | Dbl_increment(opndp1,opndp2); \ |
778 | if (Dbl_isone_hiddenoverflow(opndp1)) \ |
779 | is_tiny = FALSE; \ |
780 | Dbl_decrement(opndp1,opndp2); \ |
781 | } \ |
782 | break; \ |
783 | case ROUNDNEAREST: \ |
784 | if (Dblext_isone_highp3(opndp3) && \ |
785 | (Dblext_isone_lowp2(opndp2) || \ |
786 | Dblext_isnotzero_low31p3(opndp3))) { \ |
787 | Dbl_increment(opndp1,opndp2); \ |
788 | if (Dbl_isone_hiddenoverflow(opndp1)) \ |
789 | is_tiny = FALSE; \ |
790 | Dbl_decrement(opndp1,opndp2); \ |
791 | } \ |
792 | break; \ |
793 | } \ |
794 | } \ |
795 | Dblext_clear_signexponent_set_hidden(opndp1); \ |
796 | if (exponent >= (1-QUAD_P)) { \ |
797 | shiftamt = (1-exponent) % 32; \ |
798 | switch((1-exponent)/32) { \ |
799 | case 0: sticky = Dextallp4(opndp4) << 32-(shiftamt); \ |
800 | Variableshiftdouble(opndp3,opndp4,shiftamt,opndp4); \ |
801 | Variableshiftdouble(opndp2,opndp3,shiftamt,opndp3); \ |
802 | Variableshiftdouble(opndp1,opndp2,shiftamt,opndp2); \ |
803 | Dextallp1(opndp1) >>= shiftamt; \ |
804 | break; \ |
805 | case 1: sticky = (Dextallp3(opndp3) << 32-(shiftamt)) | \ |
806 | Dextallp4(opndp4); \ |
807 | Variableshiftdouble(opndp2,opndp3,shiftamt,opndp4); \ |
808 | Variableshiftdouble(opndp1,opndp2,shiftamt,opndp3); \ |
809 | Dextallp2(opndp2) = Dextallp1(opndp1) >> shiftamt; \ |
810 | Dextallp1(opndp1) = 0; \ |
811 | break; \ |
812 | case 2: sticky = (Dextallp2(opndp2) << 32-(shiftamt)) | \ |
813 | Dextallp3(opndp3) | Dextallp4(opndp4); \ |
814 | Variableshiftdouble(opndp1,opndp2,shiftamt,opndp4); \ |
815 | Dextallp3(opndp3) = Dextallp1(opndp1) >> shiftamt; \ |
816 | Dextallp1(opndp1) = Dextallp2(opndp2) = 0; \ |
817 | break; \ |
818 | case 3: sticky = (Dextallp1(opndp1) << 32-(shiftamt)) | \ |
819 | Dextallp2(opndp2) | Dextallp3(opndp3) | \ |
820 | Dextallp4(opndp4); \ |
821 | Dextallp4(opndp4) = Dextallp1(opndp1) >> shiftamt; \ |
822 | Dextallp1(opndp1) = Dextallp2(opndp2) = 0; \ |
823 | Dextallp3(opndp3) = 0; \ |
824 | break; \ |
825 | } \ |
826 | } \ |
827 | else { \ |
828 | sticky = Dextallp1(opndp1) | Dextallp2(opndp2) | \ |
829 | Dextallp3(opndp3) | Dextallp4(opndp4); \ |
830 | Dblext_setzero(opndp1,opndp2,opndp3,opndp4); \ |
831 | } \ |
832 | if (sticky) Dblext_setone_lowmantissap4(opndp4); \ |
833 | exponent = 0; \ |
834 | } |
835 | |