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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; \ } |