Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 1 | // © 2016 and later: Unicode, Inc. and others. |
| 2 | // License & terms of use: http://www.unicode.org/copyright.html |
| 3 | /* ------------------------------------------------------------------ */ |
| 4 | /* decNumber package local type, tuning, and macro definitions */ |
| 5 | /* ------------------------------------------------------------------ */ |
| 6 | /* Copyright (c) IBM Corporation, 2000-2016. All rights reserved. */ |
| 7 | /* */ |
| 8 | /* This software is made available under the terms of the */ |
| 9 | /* ICU License -- ICU 1.8.1 and later. */ |
| 10 | /* */ |
| 11 | /* The description and User's Guide ("The decNumber C Library") for */ |
| 12 | /* this software is called decNumber.pdf. This document is */ |
| 13 | /* available, together with arithmetic and format specifications, */ |
| 14 | /* testcases, and Web links, on the General Decimal Arithmetic page. */ |
| 15 | /* */ |
| 16 | /* Please send comments, suggestions, and corrections to the author: */ |
| 17 | /* mfc@uk.ibm.com */ |
| 18 | /* Mike Cowlishaw, IBM Fellow */ |
| 19 | /* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */ |
| 20 | /* ------------------------------------------------------------------ */ |
| 21 | /* This header file is included by all modules in the decNumber */ |
| 22 | /* library, and contains local type definitions, tuning parameters, */ |
| 23 | /* etc. It should not need to be used by application programs. */ |
| 24 | /* decNumber.h or one of decDouble (etc.) must be included first. */ |
| 25 | /* ------------------------------------------------------------------ */ |
| 26 | |
| 27 | #if !defined(DECNUMBERLOC) |
| 28 | #define DECNUMBERLOC |
| 29 | #define DECVERSION "decNumber 3.61" /* Package Version [16 max.] */ |
| 30 | #define DECNLAUTHOR "Mike Cowlishaw" /* Who to blame */ |
| 31 | |
| 32 | #include <stdlib.h> /* for abs */ |
| 33 | #include <string.h> /* for memset, strcpy */ |
| 34 | #include "decContext.h" |
| 35 | |
| 36 | /* Conditional code flag -- set this to match hardware platform */ |
| 37 | #if !defined(DECLITEND) |
| 38 | #define DECLITEND 1 /* 1=little-endian, 0=big-endian */ |
| 39 | #endif |
| 40 | |
| 41 | /* Conditional code flag -- set this to 1 for best performance */ |
| 42 | #if !defined(DECUSE64) |
| 43 | #define DECUSE64 1 /* 1=use int64s, 0=int32 & smaller only */ |
| 44 | #endif |
| 45 | |
| 46 | /* Conditional check flags -- set these to 0 for best performance */ |
| 47 | #if !defined(DECCHECK) |
| 48 | #define DECCHECK 0 /* 1 to enable robust checking */ |
| 49 | #endif |
| 50 | #if !defined(DECALLOC) |
| 51 | #define DECALLOC 0 /* 1 to enable memory accounting */ |
| 52 | #endif |
| 53 | #if !defined(DECTRACE) |
| 54 | #define DECTRACE 0 /* 1 to trace certain internals, etc. */ |
| 55 | #endif |
| 56 | |
| 57 | /* Tuning parameter for decNumber (arbitrary precision) module */ |
| 58 | #if !defined(DECBUFFER) |
| 59 | #define DECBUFFER 36 /* Size basis for local buffers. This */ |
| 60 | /* should be a common maximum precision */ |
| 61 | /* rounded up to a multiple of 4; must */ |
| 62 | /* be zero or positive. */ |
| 63 | #endif |
| 64 | |
| 65 | /* ---------------------------------------------------------------- */ |
| 66 | /* Definitions for all modules (general-purpose) */ |
| 67 | /* ---------------------------------------------------------------- */ |
| 68 | |
| 69 | /* Local names for common types -- for safety, decNumber modules do */ |
| 70 | /* not use int or long directly. */ |
| 71 | #define Flag uint8_t |
| 72 | #define Byte int8_t |
| 73 | #define uByte uint8_t |
| 74 | #define Short int16_t |
| 75 | #define uShort uint16_t |
| 76 | #define Int int32_t |
| 77 | #define uInt uint32_t |
| 78 | #define Unit decNumberUnit |
| 79 | #if DECUSE64 |
| 80 | #define Long int64_t |
| 81 | #define uLong uint64_t |
| 82 | #endif |
| 83 | |
| 84 | /* Development-use definitions */ |
| 85 | typedef long int LI; /* for printf arguments only */ |
| 86 | #define DECNOINT 0 /* 1 to check no internal use of 'int' */ |
| 87 | /* or stdint types */ |
| 88 | #if DECNOINT |
| 89 | /* if these interfere with your C includes, do not set DECNOINT */ |
| 90 | #define int ? /* enable to ensure that plain C 'int' */ |
| 91 | #define long ?? /* .. or 'long' types are not used */ |
| 92 | #endif |
| 93 | |
| 94 | /* LONGMUL32HI -- set w=(u*v)>>32, where w, u, and v are uInts */ |
| 95 | /* (that is, sets w to be the high-order word of the 64-bit result; */ |
| 96 | /* the low-order word is simply u*v.) */ |
| 97 | /* This version is derived from Knuth via Hacker's Delight; */ |
| 98 | /* it seems to optimize better than some others tried */ |
| 99 | #define LONGMUL32HI(w, u, v) { \ |
| 100 | uInt u0, u1, v0, v1, w0, w1, w2, t; \ |
| 101 | u0=u & 0xffff; u1=u>>16; \ |
| 102 | v0=v & 0xffff; v1=v>>16; \ |
| 103 | w0=u0*v0; \ |
| 104 | t=u1*v0 + (w0>>16); \ |
| 105 | w1=t & 0xffff; w2=t>>16; \ |
| 106 | w1=u0*v1 + w1; \ |
| 107 | (w)=u1*v1 + w2 + (w1>>16);} |
| 108 | |
| 109 | /* ROUNDUP -- round an integer up to a multiple of n */ |
| 110 | #define ROUNDUP(i, n) ((((i)+(n)-1)/n)*n) |
| 111 | #define ROUNDUP4(i) (((i)+3)&~3) /* special for n=4 */ |
| 112 | |
| 113 | /* ROUNDDOWN -- round an integer down to a multiple of n */ |
| 114 | #define ROUNDDOWN(i, n) (((i)/n)*n) |
| 115 | #define ROUNDDOWN4(i) ((i)&~3) /* special for n=4 */ |
| 116 | |
| 117 | /* References to multi-byte sequences under different sizes; these */ |
| 118 | /* require locally declared variables, but do not violate strict */ |
| 119 | /* aliasing or alignment (as did the UINTAT simple cast to uInt). */ |
| 120 | /* Variables needed are uswork, uiwork, etc. [so do not use at same */ |
| 121 | /* level in an expression, e.g., UBTOUI(x)==UBTOUI(y) may fail]. */ |
| 122 | |
| 123 | /* Return a uInt, etc., from bytes starting at a char* or uByte* */ |
| 124 | #define UBTOUS(b) (memcpy((void *)&uswork, b, 2), uswork) |
| 125 | #define UBTOUI(b) (memcpy((void *)&uiwork, b, 4), uiwork) |
| 126 | |
| 127 | /* Store a uInt, etc., into bytes starting at a char* or uByte*. */ |
| 128 | /* Returns i, evaluated, for convenience; has to use uiwork because */ |
| 129 | /* i may be an expression. */ |
| 130 | #define UBFROMUS(b, i) (uswork=(i), memcpy(b, (void *)&uswork, 2), uswork) |
| 131 | #define UBFROMUI(b, i) (uiwork=(i), memcpy(b, (void *)&uiwork, 4), uiwork) |
| 132 | |
| 133 | /* X10 and X100 -- multiply integer i by 10 or 100 */ |
| 134 | /* [shifts are usually faster than multiply; could be conditional] */ |
| 135 | #define X10(i) (((i)<<1)+((i)<<3)) |
| 136 | #define X100(i) (((i)<<2)+((i)<<5)+((i)<<6)) |
| 137 | |
| 138 | /* MAXI and MINI -- general max & min (not in ANSI) for integers */ |
| 139 | #define MAXI(x,y) ((x)<(y)?(y):(x)) |
| 140 | #define MINI(x,y) ((x)>(y)?(y):(x)) |
| 141 | |
| 142 | /* Useful constants */ |
| 143 | #define BILLION 1000000000 /* 10**9 */ |
| 144 | /* CHARMASK: 0x30303030 for ASCII/UTF8; 0xF0F0F0F0 for EBCDIC */ |
| 145 | #define CHARMASK ((((((((uInt)'0')<<8)+'0')<<8)+'0')<<8)+'0') |
| 146 | |
| 147 | |
| 148 | /* ---------------------------------------------------------------- */ |
| 149 | /* Definitions for arbitary-precision modules (only valid after */ |
| 150 | /* decNumber.h has been included) */ |
| 151 | /* ---------------------------------------------------------------- */ |
| 152 | |
| 153 | /* Limits and constants */ |
| 154 | #define DECNUMMAXP 999999999 /* maximum precision code can handle */ |
| 155 | #define DECNUMMAXE 999999999 /* maximum adjusted exponent ditto */ |
| 156 | #define DECNUMMINE -999999999 /* minimum adjusted exponent ditto */ |
| 157 | #if (DECNUMMAXP != DEC_MAX_DIGITS) |
| 158 | #error Maximum digits mismatch |
| 159 | #endif |
| 160 | #if (DECNUMMAXE != DEC_MAX_EMAX) |
| 161 | #error Maximum exponent mismatch |
| 162 | #endif |
| 163 | #if (DECNUMMINE != DEC_MIN_EMIN) |
| 164 | #error Minimum exponent mismatch |
| 165 | #endif |
| 166 | |
| 167 | /* Set DECDPUNMAX -- the maximum integer that fits in DECDPUN */ |
| 168 | /* digits, and D2UTABLE -- the initializer for the D2U table */ |
| 169 | #ifndef DECDPUN |
| 170 | // no-op |
| 171 | #elif DECDPUN==1 |
| 172 | #define DECDPUNMAX 9 |
| 173 | #define D2UTABLE {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17, \ |
| 174 | 18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, \ |
| 175 | 33,34,35,36,37,38,39,40,41,42,43,44,45,46,47, \ |
| 176 | 48,49} |
| 177 | #elif DECDPUN==2 |
| 178 | #define DECDPUNMAX 99 |
| 179 | #define D2UTABLE {0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10, \ |
| 180 | 11,11,12,12,13,13,14,14,15,15,16,16,17,17,18, \ |
| 181 | 18,19,19,20,20,21,21,22,22,23,23,24,24,25} |
| 182 | #elif DECDPUN==3 |
| 183 | #define DECDPUNMAX 999 |
| 184 | #define D2UTABLE {0,1,1,1,2,2,2,3,3,3,4,4,4,5,5,5,6,6,6,7,7,7, \ |
| 185 | 8,8,8,9,9,9,10,10,10,11,11,11,12,12,12,13,13, \ |
| 186 | 13,14,14,14,15,15,15,16,16,16,17} |
| 187 | #elif DECDPUN==4 |
| 188 | #define DECDPUNMAX 9999 |
| 189 | #define D2UTABLE {0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6, \ |
| 190 | 6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,10,10,10,10,11, \ |
| 191 | 11,11,11,12,12,12,12,13} |
| 192 | #elif DECDPUN==5 |
| 193 | #define DECDPUNMAX 99999 |
| 194 | #define D2UTABLE {0,1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5, \ |
| 195 | 5,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9, \ |
| 196 | 9,9,10,10,10,10} |
| 197 | #elif DECDPUN==6 |
| 198 | #define DECDPUNMAX 999999 |
| 199 | #define D2UTABLE {0,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,4,4,4, \ |
| 200 | 4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,8, \ |
| 201 | 8,8,8,8,8,9} |
| 202 | #elif DECDPUN==7 |
| 203 | #define DECDPUNMAX 9999999 |
| 204 | #define D2UTABLE {0,1,1,1,1,1,1,1,2,2,2,2,2,2,2,3,3,3,3,3,3,3, \ |
| 205 | 4,4,4,4,4,4,4,5,5,5,5,5,5,5,6,6,6,6,6,6,6,7, \ |
| 206 | 7,7,7,7,7,7} |
| 207 | #elif DECDPUN==8 |
| 208 | #define DECDPUNMAX 99999999 |
| 209 | #define D2UTABLE {0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3, \ |
| 210 | 3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,6,6,6, \ |
| 211 | 6,6,6,6,6,7} |
| 212 | #elif DECDPUN==9 |
| 213 | #define DECDPUNMAX 999999999 |
| 214 | #define D2UTABLE {0,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,3,3,3, \ |
| 215 | 3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5, \ |
| 216 | 5,5,6,6,6,6} |
| 217 | #else |
| 218 | #error DECDPUN must be in the range 1-9 |
| 219 | #endif |
| 220 | |
| 221 | /* ----- Shared data (in decNumber.c) ----- */ |
| 222 | /* Public lookup table used by the D2U macro (see below) */ |
| 223 | #define DECMAXD2U 49 |
| 224 | /*extern const uByte d2utable[DECMAXD2U+1];*/ |
| 225 | |
| 226 | /* ----- Macros ----- */ |
| 227 | /* ISZERO -- return true if decNumber dn is a zero */ |
| 228 | /* [performance-critical in some situations] */ |
| 229 | #define ISZERO(dn) decNumberIsZero(dn) /* now just a local name */ |
| 230 | |
| 231 | /* D2U -- return the number of Units needed to hold d digits */ |
| 232 | /* (runtime version, with table lookaside for small d) */ |
| 233 | #if defined(DECDPUN) && DECDPUN==8 |
| 234 | #define D2U(d) ((unsigned)((d)<=DECMAXD2U?d2utable[d]:((d)+7)>>3)) |
| 235 | #elif defined(DECDPUN) && DECDPUN==4 |
| 236 | #define D2U(d) ((unsigned)((d)<=DECMAXD2U?d2utable[d]:((d)+3)>>2)) |
| 237 | #else |
| 238 | #define D2U(d) ((d)<=DECMAXD2U?d2utable[d]:((d)+DECDPUN-1)/DECDPUN) |
| 239 | #endif |
| 240 | /* SD2U -- static D2U macro (for compile-time calculation) */ |
| 241 | #define SD2U(d) (((d)+DECDPUN-1)/DECDPUN) |
| 242 | |
| 243 | /* MSUDIGITS -- returns digits in msu, from digits, calculated */ |
| 244 | /* using D2U */ |
| 245 | #define MSUDIGITS(d) ((d)-(D2U(d)-1)*DECDPUN) |
| 246 | |
| 247 | /* D2N -- return the number of decNumber structs that would be */ |
| 248 | /* needed to contain that number of digits (and the initial */ |
| 249 | /* decNumber struct) safely. Note that one Unit is included in the */ |
| 250 | /* initial structure. Used for allocating space that is aligned on */ |
| 251 | /* a decNumber struct boundary. */ |
| 252 | #define D2N(d) \ |
| 253 | ((((SD2U(d)-1)*sizeof(Unit))+sizeof(decNumber)*2-1)/sizeof(decNumber)) |
| 254 | |
| 255 | /* TODIGIT -- macro to remove the leading digit from the unsigned */ |
| 256 | /* integer u at column cut (counting from the right, LSD=0) and */ |
| 257 | /* place it as an ASCII character into the character pointed to by */ |
| 258 | /* c. Note that cut must be <= 9, and the maximum value for u is */ |
| 259 | /* 2,000,000,000 (as is needed for negative exponents of */ |
| 260 | /* subnormals). The unsigned integer pow is used as a temporary */ |
| 261 | /* variable. */ |
| 262 | #define TODIGIT(u, cut, c, pow) UPRV_BLOCK_MACRO_BEGIN { \ |
| 263 | *(c)='0'; \ |
| 264 | pow=DECPOWERS[cut]*2; \ |
| 265 | if ((u)>pow) { \ |
| 266 | pow*=4; \ |
| 267 | if ((u)>=pow) {(u)-=pow; *(c)+=8;} \ |
| 268 | pow/=2; \ |
| 269 | if ((u)>=pow) {(u)-=pow; *(c)+=4;} \ |
| 270 | pow/=2; \ |
| 271 | } \ |
| 272 | if ((u)>=pow) {(u)-=pow; *(c)+=2;} \ |
| 273 | pow/=2; \ |
| 274 | if ((u)>=pow) {(u)-=pow; *(c)+=1;} \ |
| 275 | } UPRV_BLOCK_MACRO_END |
| 276 | |
| 277 | /* ---------------------------------------------------------------- */ |
| 278 | /* Definitions for fixed-precision modules (only valid after */ |
| 279 | /* decSingle.h, decDouble.h, or decQuad.h has been included) */ |
| 280 | /* ---------------------------------------------------------------- */ |
| 281 | |
| 282 | /* bcdnum -- a structure describing a format-independent finite */ |
| 283 | /* number, whose coefficient is a string of bcd8 uBytes */ |
| 284 | typedef struct { |
| 285 | uByte *msd; /* -> most significant digit */ |
| 286 | uByte *lsd; /* -> least ditto */ |
| 287 | uInt sign; /* 0=positive, DECFLOAT_Sign=negative */ |
| 288 | Int exponent; /* Unadjusted signed exponent (q), or */ |
| 289 | /* DECFLOAT_NaN etc. for a special */ |
| 290 | } bcdnum; |
| 291 | |
| 292 | /* Test if exponent or bcdnum exponent must be a special, etc. */ |
| 293 | #define EXPISSPECIAL(exp) ((exp)>=DECFLOAT_MinSp) |
| 294 | #define EXPISINF(exp) (exp==DECFLOAT_Inf) |
| 295 | #define EXPISNAN(exp) (exp==DECFLOAT_qNaN || exp==DECFLOAT_sNaN) |
| 296 | #define NUMISSPECIAL(num) (EXPISSPECIAL((num)->exponent)) |
| 297 | |
| 298 | /* Refer to a 32-bit word or byte in a decFloat (df) by big-endian */ |
| 299 | /* (array) notation (the 0 word or byte contains the sign bit), */ |
| 300 | /* automatically adjusting for endianness; similarly address a word */ |
| 301 | /* in the next-wider format (decFloatWider, or dfw) */ |
| 302 | #define DECWORDS (DECBYTES/4) |
| 303 | #define DECWWORDS (DECWBYTES/4) |
| 304 | #if DECLITEND |
| 305 | #define DFBYTE(df, off) ((df)->bytes[DECBYTES-1-(off)]) |
| 306 | #define DFWORD(df, off) ((df)->words[DECWORDS-1-(off)]) |
| 307 | #define DFWWORD(dfw, off) ((dfw)->words[DECWWORDS-1-(off)]) |
| 308 | #else |
| 309 | #define DFBYTE(df, off) ((df)->bytes[off]) |
| 310 | #define DFWORD(df, off) ((df)->words[off]) |
| 311 | #define DFWWORD(dfw, off) ((dfw)->words[off]) |
| 312 | #endif |
| 313 | |
| 314 | /* Tests for sign or specials, directly on DECFLOATs */ |
| 315 | #define DFISSIGNED(df) (DFWORD(df, 0)&0x80000000) |
| 316 | #define DFISSPECIAL(df) ((DFWORD(df, 0)&0x78000000)==0x78000000) |
| 317 | #define DFISINF(df) ((DFWORD(df, 0)&0x7c000000)==0x78000000) |
| 318 | #define DFISNAN(df) ((DFWORD(df, 0)&0x7c000000)==0x7c000000) |
| 319 | #define DFISQNAN(df) ((DFWORD(df, 0)&0x7e000000)==0x7c000000) |
| 320 | #define DFISSNAN(df) ((DFWORD(df, 0)&0x7e000000)==0x7e000000) |
| 321 | |
| 322 | /* Shared lookup tables */ |
| 323 | extern const uInt DECCOMBMSD[64]; /* Combination field -> MSD */ |
| 324 | extern const uInt DECCOMBFROM[48]; /* exp+msd -> Combination */ |
| 325 | |
| 326 | /* Private generic (utility) routine */ |
| 327 | #if DECCHECK || DECTRACE |
| 328 | extern void decShowNum(const bcdnum *, const char *); |
| 329 | #endif |
| 330 | |
| 331 | /* Format-dependent macros and constants */ |
| 332 | #if defined(DECPMAX) |
| 333 | |
| 334 | /* Useful constants */ |
| 335 | #define DECPMAX9 (ROUNDUP(DECPMAX, 9)/9) /* 'Pmax' in 10**9s */ |
| 336 | /* Top words for a zero */ |
| 337 | #define SINGLEZERO 0x22500000 |
| 338 | #define DOUBLEZERO 0x22380000 |
| 339 | #define QUADZERO 0x22080000 |
| 340 | /* [ZEROWORD is defined to be one of these in the DFISZERO macro] */ |
| 341 | |
| 342 | /* Format-dependent common tests: */ |
| 343 | /* DFISZERO -- test for (any) zero */ |
| 344 | /* DFISCCZERO -- test for coefficient continuation being zero */ |
| 345 | /* DFISCC01 -- test for coefficient contains only 0s and 1s */ |
| 346 | /* DFISINT -- test for finite and exponent q=0 */ |
| 347 | /* DFISUINT01 -- test for sign=0, finite, exponent q=0, and */ |
| 348 | /* MSD=0 or 1 */ |
| 349 | /* ZEROWORD is also defined here. */ |
| 350 | /* In DFISZERO the first test checks the least-significant word */ |
| 351 | /* (most likely to be non-zero); the penultimate tests MSD and */ |
| 352 | /* DPDs in the signword, and the final test excludes specials and */ |
| 353 | /* MSD>7. DFISINT similarly has to allow for the two forms of */ |
| 354 | /* MSD codes. DFISUINT01 only has to allow for one form of MSD */ |
| 355 | /* code. */ |
| 356 | #if DECPMAX==7 |
| 357 | #define ZEROWORD SINGLEZERO |
| 358 | /* [test macros not needed except for Zero] */ |
| 359 | #define DFISZERO(df) ((DFWORD(df, 0)&0x1c0fffff)==0 \ |
| 360 | && (DFWORD(df, 0)&0x60000000)!=0x60000000) |
| 361 | #elif DECPMAX==16 |
| 362 | #define ZEROWORD DOUBLEZERO |
| 363 | #define DFISZERO(df) ((DFWORD(df, 1)==0 \ |
| 364 | && (DFWORD(df, 0)&0x1c03ffff)==0 \ |
| 365 | && (DFWORD(df, 0)&0x60000000)!=0x60000000)) |
| 366 | #define DFISINT(df) ((DFWORD(df, 0)&0x63fc0000)==0x22380000 \ |
| 367 | ||(DFWORD(df, 0)&0x7bfc0000)==0x6a380000) |
| 368 | #define DFISUINT01(df) ((DFWORD(df, 0)&0xfbfc0000)==0x22380000) |
| 369 | #define DFISCCZERO(df) (DFWORD(df, 1)==0 \ |
| 370 | && (DFWORD(df, 0)&0x0003ffff)==0) |
| 371 | #define DFISCC01(df) ((DFWORD(df, 0)&~0xfffc9124)==0 \ |
| 372 | && (DFWORD(df, 1)&~0x49124491)==0) |
| 373 | #elif DECPMAX==34 |
| 374 | #define ZEROWORD QUADZERO |
| 375 | #define DFISZERO(df) ((DFWORD(df, 3)==0 \ |
| 376 | && DFWORD(df, 2)==0 \ |
| 377 | && DFWORD(df, 1)==0 \ |
| 378 | && (DFWORD(df, 0)&0x1c003fff)==0 \ |
| 379 | && (DFWORD(df, 0)&0x60000000)!=0x60000000)) |
| 380 | #define DFISINT(df) ((DFWORD(df, 0)&0x63ffc000)==0x22080000 \ |
| 381 | ||(DFWORD(df, 0)&0x7bffc000)==0x6a080000) |
| 382 | #define DFISUINT01(df) ((DFWORD(df, 0)&0xfbffc000)==0x22080000) |
| 383 | #define DFISCCZERO(df) (DFWORD(df, 3)==0 \ |
| 384 | && DFWORD(df, 2)==0 \ |
| 385 | && DFWORD(df, 1)==0 \ |
| 386 | && (DFWORD(df, 0)&0x00003fff)==0) |
| 387 | |
| 388 | #define DFISCC01(df) ((DFWORD(df, 0)&~0xffffc912)==0 \ |
| 389 | && (DFWORD(df, 1)&~0x44912449)==0 \ |
| 390 | && (DFWORD(df, 2)&~0x12449124)==0 \ |
| 391 | && (DFWORD(df, 3)&~0x49124491)==0) |
| 392 | #endif |
| 393 | |
| 394 | /* Macros to test if a certain 10 bits of a uInt or pair of uInts */ |
| 395 | /* are a canonical declet [higher or lower bits are ignored]. */ |
| 396 | /* declet is at offset 0 (from the right) in a uInt: */ |
| 397 | #define CANONDPD(dpd) (((dpd)&0x300)==0 || ((dpd)&0x6e)!=0x6e) |
| 398 | /* declet is at offset k (a multiple of 2) in a uInt: */ |
| 399 | #define CANONDPDOFF(dpd, k) (((dpd)&(0x300<<(k)))==0 \ |
| 400 | || ((dpd)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k))) |
| 401 | /* declet is at offset k (a multiple of 2) in a pair of uInts: */ |
| 402 | /* [the top 2 bits will always be in the more-significant uInt] */ |
| 403 | #define CANONDPDTWO(hi, lo, k) (((hi)&(0x300>>(32-(k))))==0 \ |
| 404 | || ((hi)&(0x6e>>(32-(k))))!=(0x6e>>(32-(k))) \ |
| 405 | || ((lo)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k))) |
| 406 | |
| 407 | /* Macro to test whether a full-length (length DECPMAX) BCD8 */ |
| 408 | /* coefficient, starting at uByte u, is all zeros */ |
| 409 | /* Test just the LSWord first, then the remainder as a sequence */ |
| 410 | /* of tests in order to avoid same-level use of UBTOUI */ |
| 411 | #if DECPMAX==7 |
| 412 | #define ISCOEFFZERO(u) ( \ |
| 413 | UBTOUI((u)+DECPMAX-4)==0 \ |
| 414 | && UBTOUS((u)+DECPMAX-6)==0 \ |
| 415 | && *(u)==0) |
| 416 | #elif DECPMAX==16 |
| 417 | #define ISCOEFFZERO(u) ( \ |
| 418 | UBTOUI((u)+DECPMAX-4)==0 \ |
| 419 | && UBTOUI((u)+DECPMAX-8)==0 \ |
| 420 | && UBTOUI((u)+DECPMAX-12)==0 \ |
| 421 | && UBTOUI(u)==0) |
| 422 | #elif DECPMAX==34 |
| 423 | #define ISCOEFFZERO(u) ( \ |
| 424 | UBTOUI((u)+DECPMAX-4)==0 \ |
| 425 | && UBTOUI((u)+DECPMAX-8)==0 \ |
| 426 | && UBTOUI((u)+DECPMAX-12)==0 \ |
| 427 | && UBTOUI((u)+DECPMAX-16)==0 \ |
| 428 | && UBTOUI((u)+DECPMAX-20)==0 \ |
| 429 | && UBTOUI((u)+DECPMAX-24)==0 \ |
| 430 | && UBTOUI((u)+DECPMAX-28)==0 \ |
| 431 | && UBTOUI((u)+DECPMAX-32)==0 \ |
| 432 | && UBTOUS(u)==0) |
| 433 | #endif |
| 434 | |
| 435 | /* Macros and masks for the exponent continuation field and MSD */ |
| 436 | /* Get the exponent continuation from a decFloat *df as an Int */ |
| 437 | #define GETECON(df) ((Int)((DFWORD((df), 0)&0x03ffffff)>>(32-6-DECECONL))) |
| 438 | /* Ditto, from the next-wider format */ |
| 439 | #define GETWECON(df) ((Int)((DFWWORD((df), 0)&0x03ffffff)>>(32-6-DECWECONL))) |
| 440 | /* Get the biased exponent similarly */ |
| 441 | #define GETEXP(df) ((Int)(DECCOMBEXP[DFWORD((df), 0)>>26]+GETECON(df))) |
| 442 | /* Get the unbiased exponent similarly */ |
| 443 | #define GETEXPUN(df) ((Int)GETEXP(df)-DECBIAS) |
| 444 | /* Get the MSD similarly (as uInt) */ |
| 445 | #define GETMSD(df) (DECCOMBMSD[DFWORD((df), 0)>>26]) |
| 446 | |
| 447 | /* Compile-time computes of the exponent continuation field masks */ |
| 448 | /* full exponent continuation field: */ |
| 449 | #define ECONMASK ((0x03ffffff>>(32-6-DECECONL))<<(32-6-DECECONL)) |
| 450 | /* same, not including its first digit (the qNaN/sNaN selector): */ |
| 451 | #define ECONNANMASK ((0x01ffffff>>(32-6-DECECONL))<<(32-6-DECECONL)) |
| 452 | |
| 453 | /* Macros to decode the coefficient in a finite decFloat *df into */ |
| 454 | /* a BCD string (uByte *bcdin) of length DECPMAX uBytes. */ |
| 455 | |
| 456 | /* In-line sequence to convert least significant 10 bits of uInt */ |
| 457 | /* dpd to three BCD8 digits starting at uByte u. Note that an */ |
| 458 | /* extra byte is written to the right of the three digits because */ |
| 459 | /* four bytes are moved at a time for speed; the alternative */ |
| 460 | /* macro moves exactly three bytes (usually slower). */ |
| 461 | #define dpd2bcd8(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 4) |
| 462 | #define dpd2bcd83(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 3) |
| 463 | |
| 464 | /* Decode the declets. After extracting each one, it is decoded */ |
| 465 | /* to BCD8 using a table lookup (also used for variable-length */ |
| 466 | /* decode). Each DPD decode is 3 bytes BCD8 plus a one-byte */ |
| 467 | /* length which is not used, here). Fixed-length 4-byte moves */ |
| 468 | /* are fast, however, almost everywhere, and so are used except */ |
| 469 | /* for the final three bytes (to avoid overrun). The code below */ |
| 470 | /* is 36 instructions for Doubles and about 70 for Quads, even */ |
| 471 | /* on IA32. */ |
| 472 | |
| 473 | /* Two macros are defined for each format: */ |
| 474 | /* GETCOEFF extracts the coefficient of the current format */ |
| 475 | /* GETWCOEFF extracts the coefficient of the next-wider format. */ |
| 476 | /* The latter is a copy of the next-wider GETCOEFF using DFWWORD. */ |
| 477 | |
| 478 | #if DECPMAX==7 |
| 479 | #define GETCOEFF(df, bcd) { \ |
| 480 | uInt sourhi=DFWORD(df, 0); \ |
| 481 | *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ |
| 482 | dpd2bcd8(bcd+1, sourhi>>10); \ |
| 483 | dpd2bcd83(bcd+4, sourhi);} |
| 484 | #define GETWCOEFF(df, bcd) { \ |
| 485 | uInt sourhi=DFWWORD(df, 0); \ |
| 486 | uInt sourlo=DFWWORD(df, 1); \ |
| 487 | *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ |
| 488 | dpd2bcd8(bcd+1, sourhi>>8); \ |
| 489 | dpd2bcd8(bcd+4, (sourhi<<2) | (sourlo>>30)); \ |
| 490 | dpd2bcd8(bcd+7, sourlo>>20); \ |
| 491 | dpd2bcd8(bcd+10, sourlo>>10); \ |
| 492 | dpd2bcd83(bcd+13, sourlo);} |
| 493 | |
| 494 | #elif DECPMAX==16 |
| 495 | #define GETCOEFF(df, bcd) { \ |
| 496 | uInt sourhi=DFWORD(df, 0); \ |
| 497 | uInt sourlo=DFWORD(df, 1); \ |
| 498 | *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ |
| 499 | dpd2bcd8(bcd+1, sourhi>>8); \ |
| 500 | dpd2bcd8(bcd+4, (sourhi<<2) | (sourlo>>30)); \ |
| 501 | dpd2bcd8(bcd+7, sourlo>>20); \ |
| 502 | dpd2bcd8(bcd+10, sourlo>>10); \ |
| 503 | dpd2bcd83(bcd+13, sourlo);} |
| 504 | #define GETWCOEFF(df, bcd) { \ |
| 505 | uInt sourhi=DFWWORD(df, 0); \ |
| 506 | uInt sourmh=DFWWORD(df, 1); \ |
| 507 | uInt sourml=DFWWORD(df, 2); \ |
| 508 | uInt sourlo=DFWWORD(df, 3); \ |
| 509 | *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ |
| 510 | dpd2bcd8(bcd+1, sourhi>>4); \ |
| 511 | dpd2bcd8(bcd+4, ((sourhi)<<6) | (sourmh>>26)); \ |
| 512 | dpd2bcd8(bcd+7, sourmh>>16); \ |
| 513 | dpd2bcd8(bcd+10, sourmh>>6); \ |
| 514 | dpd2bcd8(bcd+13, ((sourmh)<<4) | (sourml>>28)); \ |
| 515 | dpd2bcd8(bcd+16, sourml>>18); \ |
| 516 | dpd2bcd8(bcd+19, sourml>>8); \ |
| 517 | dpd2bcd8(bcd+22, ((sourml)<<2) | (sourlo>>30)); \ |
| 518 | dpd2bcd8(bcd+25, sourlo>>20); \ |
| 519 | dpd2bcd8(bcd+28, sourlo>>10); \ |
| 520 | dpd2bcd83(bcd+31, sourlo);} |
| 521 | |
| 522 | #elif DECPMAX==34 |
| 523 | #define GETCOEFF(df, bcd) { \ |
| 524 | uInt sourhi=DFWORD(df, 0); \ |
| 525 | uInt sourmh=DFWORD(df, 1); \ |
| 526 | uInt sourml=DFWORD(df, 2); \ |
| 527 | uInt sourlo=DFWORD(df, 3); \ |
| 528 | *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ |
| 529 | dpd2bcd8(bcd+1, sourhi>>4); \ |
| 530 | dpd2bcd8(bcd+4, ((sourhi)<<6) | (sourmh>>26)); \ |
| 531 | dpd2bcd8(bcd+7, sourmh>>16); \ |
| 532 | dpd2bcd8(bcd+10, sourmh>>6); \ |
| 533 | dpd2bcd8(bcd+13, ((sourmh)<<4) | (sourml>>28)); \ |
| 534 | dpd2bcd8(bcd+16, sourml>>18); \ |
| 535 | dpd2bcd8(bcd+19, sourml>>8); \ |
| 536 | dpd2bcd8(bcd+22, ((sourml)<<2) | (sourlo>>30)); \ |
| 537 | dpd2bcd8(bcd+25, sourlo>>20); \ |
| 538 | dpd2bcd8(bcd+28, sourlo>>10); \ |
| 539 | dpd2bcd83(bcd+31, sourlo);} |
| 540 | |
| 541 | #define GETWCOEFF(df, bcd) {??} /* [should never be used] */ |
| 542 | #endif |
| 543 | |
| 544 | /* Macros to decode the coefficient in a finite decFloat *df into */ |
| 545 | /* a base-billion uInt array, with the least-significant */ |
| 546 | /* 0-999999999 'digit' at offset 0. */ |
| 547 | |
| 548 | /* Decode the declets. After extracting each one, it is decoded */ |
| 549 | /* to binary using a table lookup. Three tables are used; one */ |
| 550 | /* the usual DPD to binary, the other two pre-multiplied by 1000 */ |
| 551 | /* and 1000000 to avoid multiplication during decode. These */ |
| 552 | /* tables can also be used for multiplying up the MSD as the DPD */ |
| 553 | /* code for 0 through 9 is the identity. */ |
| 554 | #define DPD2BIN0 DPD2BIN /* for prettier code */ |
| 555 | |
| 556 | #if DECPMAX==7 |
| 557 | #define GETCOEFFBILL(df, buf) { \ |
| 558 | uInt sourhi=DFWORD(df, 0); \ |
| 559 | (buf)[0]=DPD2BIN0[sourhi&0x3ff] \ |
| 560 | +DPD2BINK[(sourhi>>10)&0x3ff] \ |
| 561 | +DPD2BINM[DECCOMBMSD[sourhi>>26]];} |
| 562 | |
| 563 | #elif DECPMAX==16 |
| 564 | #define GETCOEFFBILL(df, buf) { \ |
| 565 | uInt sourhi, sourlo; \ |
| 566 | sourlo=DFWORD(df, 1); \ |
| 567 | (buf)[0]=DPD2BIN0[sourlo&0x3ff] \ |
| 568 | +DPD2BINK[(sourlo>>10)&0x3ff] \ |
| 569 | +DPD2BINM[(sourlo>>20)&0x3ff]; \ |
| 570 | sourhi=DFWORD(df, 0); \ |
| 571 | (buf)[1]=DPD2BIN0[((sourhi<<2) | (sourlo>>30))&0x3ff] \ |
| 572 | +DPD2BINK[(sourhi>>8)&0x3ff] \ |
| 573 | +DPD2BINM[DECCOMBMSD[sourhi>>26]];} |
| 574 | |
| 575 | #elif DECPMAX==34 |
| 576 | #define GETCOEFFBILL(df, buf) { \ |
| 577 | uInt sourhi, sourmh, sourml, sourlo; \ |
| 578 | sourlo=DFWORD(df, 3); \ |
| 579 | (buf)[0]=DPD2BIN0[sourlo&0x3ff] \ |
| 580 | +DPD2BINK[(sourlo>>10)&0x3ff] \ |
| 581 | +DPD2BINM[(sourlo>>20)&0x3ff]; \ |
| 582 | sourml=DFWORD(df, 2); \ |
| 583 | (buf)[1]=DPD2BIN0[((sourml<<2) | (sourlo>>30))&0x3ff] \ |
| 584 | +DPD2BINK[(sourml>>8)&0x3ff] \ |
| 585 | +DPD2BINM[(sourml>>18)&0x3ff]; \ |
| 586 | sourmh=DFWORD(df, 1); \ |
| 587 | (buf)[2]=DPD2BIN0[((sourmh<<4) | (sourml>>28))&0x3ff] \ |
| 588 | +DPD2BINK[(sourmh>>6)&0x3ff] \ |
| 589 | +DPD2BINM[(sourmh>>16)&0x3ff]; \ |
| 590 | sourhi=DFWORD(df, 0); \ |
| 591 | (buf)[3]=DPD2BIN0[((sourhi<<6) | (sourmh>>26))&0x3ff] \ |
| 592 | +DPD2BINK[(sourhi>>4)&0x3ff] \ |
| 593 | +DPD2BINM[DECCOMBMSD[sourhi>>26]];} |
| 594 | |
| 595 | #endif |
| 596 | |
| 597 | /* Macros to decode the coefficient in a finite decFloat *df into */ |
| 598 | /* a base-thousand uInt array (of size DECLETS+1, to allow for */ |
| 599 | /* the MSD), with the least-significant 0-999 'digit' at offset 0.*/ |
| 600 | |
| 601 | /* Decode the declets. After extracting each one, it is decoded */ |
| 602 | /* to binary using a table lookup. */ |
| 603 | #if DECPMAX==7 |
| 604 | #define GETCOEFFTHOU(df, buf) { \ |
| 605 | uInt sourhi=DFWORD(df, 0); \ |
| 606 | (buf)[0]=DPD2BIN[sourhi&0x3ff]; \ |
| 607 | (buf)[1]=DPD2BIN[(sourhi>>10)&0x3ff]; \ |
| 608 | (buf)[2]=DECCOMBMSD[sourhi>>26];} |
| 609 | |
| 610 | #elif DECPMAX==16 |
| 611 | #define GETCOEFFTHOU(df, buf) { \ |
| 612 | uInt sourhi, sourlo; \ |
| 613 | sourlo=DFWORD(df, 1); \ |
| 614 | (buf)[0]=DPD2BIN[sourlo&0x3ff]; \ |
| 615 | (buf)[1]=DPD2BIN[(sourlo>>10)&0x3ff]; \ |
| 616 | (buf)[2]=DPD2BIN[(sourlo>>20)&0x3ff]; \ |
| 617 | sourhi=DFWORD(df, 0); \ |
| 618 | (buf)[3]=DPD2BIN[((sourhi<<2) | (sourlo>>30))&0x3ff]; \ |
| 619 | (buf)[4]=DPD2BIN[(sourhi>>8)&0x3ff]; \ |
| 620 | (buf)[5]=DECCOMBMSD[sourhi>>26];} |
| 621 | |
| 622 | #elif DECPMAX==34 |
| 623 | #define GETCOEFFTHOU(df, buf) { \ |
| 624 | uInt sourhi, sourmh, sourml, sourlo; \ |
| 625 | sourlo=DFWORD(df, 3); \ |
| 626 | (buf)[0]=DPD2BIN[sourlo&0x3ff]; \ |
| 627 | (buf)[1]=DPD2BIN[(sourlo>>10)&0x3ff]; \ |
| 628 | (buf)[2]=DPD2BIN[(sourlo>>20)&0x3ff]; \ |
| 629 | sourml=DFWORD(df, 2); \ |
| 630 | (buf)[3]=DPD2BIN[((sourml<<2) | (sourlo>>30))&0x3ff]; \ |
| 631 | (buf)[4]=DPD2BIN[(sourml>>8)&0x3ff]; \ |
| 632 | (buf)[5]=DPD2BIN[(sourml>>18)&0x3ff]; \ |
| 633 | sourmh=DFWORD(df, 1); \ |
| 634 | (buf)[6]=DPD2BIN[((sourmh<<4) | (sourml>>28))&0x3ff]; \ |
| 635 | (buf)[7]=DPD2BIN[(sourmh>>6)&0x3ff]; \ |
| 636 | (buf)[8]=DPD2BIN[(sourmh>>16)&0x3ff]; \ |
| 637 | sourhi=DFWORD(df, 0); \ |
| 638 | (buf)[9]=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \ |
| 639 | (buf)[10]=DPD2BIN[(sourhi>>4)&0x3ff]; \ |
| 640 | (buf)[11]=DECCOMBMSD[sourhi>>26];} |
| 641 | #endif |
| 642 | |
| 643 | |
| 644 | /* Macros to decode the coefficient in a finite decFloat *df and */ |
| 645 | /* add to a base-thousand uInt array (as for GETCOEFFTHOU). */ |
| 646 | /* After the addition then most significant 'digit' in the array */ |
| 647 | /* might have a value larger then 10 (with a maximum of 19). */ |
| 648 | #if DECPMAX==7 |
| 649 | #define ADDCOEFFTHOU(df, buf) { \ |
| 650 | uInt sourhi=DFWORD(df, 0); \ |
| 651 | (buf)[0]+=DPD2BIN[sourhi&0x3ff]; \ |
| 652 | if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ |
| 653 | (buf)[1]+=DPD2BIN[(sourhi>>10)&0x3ff]; \ |
| 654 | if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ |
| 655 | (buf)[2]+=DECCOMBMSD[sourhi>>26];} |
| 656 | |
| 657 | #elif DECPMAX==16 |
| 658 | #define ADDCOEFFTHOU(df, buf) { \ |
| 659 | uInt sourhi, sourlo; \ |
| 660 | sourlo=DFWORD(df, 1); \ |
| 661 | (buf)[0]+=DPD2BIN[sourlo&0x3ff]; \ |
| 662 | if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ |
| 663 | (buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \ |
| 664 | if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ |
| 665 | (buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \ |
| 666 | if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \ |
| 667 | sourhi=DFWORD(df, 0); \ |
| 668 | (buf)[3]+=DPD2BIN[((sourhi<<2) | (sourlo>>30))&0x3ff]; \ |
| 669 | if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \ |
| 670 | (buf)[4]+=DPD2BIN[(sourhi>>8)&0x3ff]; \ |
| 671 | if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \ |
| 672 | (buf)[5]+=DECCOMBMSD[sourhi>>26];} |
| 673 | |
| 674 | #elif DECPMAX==34 |
| 675 | #define ADDCOEFFTHOU(df, buf) { \ |
| 676 | uInt sourhi, sourmh, sourml, sourlo; \ |
| 677 | sourlo=DFWORD(df, 3); \ |
| 678 | (buf)[0]+=DPD2BIN[sourlo&0x3ff]; \ |
| 679 | if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ |
| 680 | (buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \ |
| 681 | if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ |
| 682 | (buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \ |
| 683 | if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \ |
| 684 | sourml=DFWORD(df, 2); \ |
| 685 | (buf)[3]+=DPD2BIN[((sourml<<2) | (sourlo>>30))&0x3ff]; \ |
| 686 | if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \ |
| 687 | (buf)[4]+=DPD2BIN[(sourml>>8)&0x3ff]; \ |
| 688 | if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \ |
| 689 | (buf)[5]+=DPD2BIN[(sourml>>18)&0x3ff]; \ |
| 690 | if (buf[5]>999) {buf[5]-=1000; buf[6]++;} \ |
| 691 | sourmh=DFWORD(df, 1); \ |
| 692 | (buf)[6]+=DPD2BIN[((sourmh<<4) | (sourml>>28))&0x3ff]; \ |
| 693 | if (buf[6]>999) {buf[6]-=1000; buf[7]++;} \ |
| 694 | (buf)[7]+=DPD2BIN[(sourmh>>6)&0x3ff]; \ |
| 695 | if (buf[7]>999) {buf[7]-=1000; buf[8]++;} \ |
| 696 | (buf)[8]+=DPD2BIN[(sourmh>>16)&0x3ff]; \ |
| 697 | if (buf[8]>999) {buf[8]-=1000; buf[9]++;} \ |
| 698 | sourhi=DFWORD(df, 0); \ |
| 699 | (buf)[9]+=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \ |
| 700 | if (buf[9]>999) {buf[9]-=1000; buf[10]++;} \ |
| 701 | (buf)[10]+=DPD2BIN[(sourhi>>4)&0x3ff]; \ |
| 702 | if (buf[10]>999) {buf[10]-=1000; buf[11]++;} \ |
| 703 | (buf)[11]+=DECCOMBMSD[sourhi>>26];} |
| 704 | #endif |
| 705 | |
| 706 | |
| 707 | /* Set a decFloat to the maximum positive finite number (Nmax) */ |
| 708 | #if DECPMAX==7 |
| 709 | #define DFSETNMAX(df) \ |
| 710 | {DFWORD(df, 0)=0x77f3fcff;} |
| 711 | #elif DECPMAX==16 |
| 712 | #define DFSETNMAX(df) \ |
| 713 | {DFWORD(df, 0)=0x77fcff3f; \ |
| 714 | DFWORD(df, 1)=0xcff3fcff;} |
| 715 | #elif DECPMAX==34 |
| 716 | #define DFSETNMAX(df) \ |
| 717 | {DFWORD(df, 0)=0x77ffcff3; \ |
| 718 | DFWORD(df, 1)=0xfcff3fcf; \ |
| 719 | DFWORD(df, 2)=0xf3fcff3f; \ |
| 720 | DFWORD(df, 3)=0xcff3fcff;} |
| 721 | #endif |
| 722 | |
| 723 | /* [end of format-dependent macros and constants] */ |
| 724 | #endif |
| 725 | |
| 726 | #else |
| 727 | #error decNumberLocal included more than once |
| 728 | #endif |