| 1 |
731 |
jeremybenn |
/* Local definitions for the decNumber C Library.
|
| 2 |
|
|
Copyright (C) 2007, 2009 Free Software Foundation, Inc.
|
| 3 |
|
|
Contributed by IBM Corporation. Author Mike Cowlishaw.
|
| 4 |
|
|
|
| 5 |
|
|
This file is part of GCC.
|
| 6 |
|
|
|
| 7 |
|
|
GCC is free software; you can redistribute it and/or modify it under
|
| 8 |
|
|
the terms of the GNU General Public License as published by the Free
|
| 9 |
|
|
Software Foundation; either version 3, or (at your option) any later
|
| 10 |
|
|
version.
|
| 11 |
|
|
|
| 12 |
|
|
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
|
| 13 |
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
| 14 |
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
| 15 |
|
|
for more details.
|
| 16 |
|
|
|
| 17 |
|
|
Under Section 7 of GPL version 3, you are granted additional
|
| 18 |
|
|
permissions described in the GCC Runtime Library Exception, version
|
| 19 |
|
|
3.1, as published by the Free Software Foundation.
|
| 20 |
|
|
|
| 21 |
|
|
You should have received a copy of the GNU General Public License and
|
| 22 |
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
| 23 |
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
| 24 |
|
|
<http://www.gnu.org/licenses/>. */
|
| 25 |
|
|
|
| 26 |
|
|
/* ------------------------------------------------------------------ */
|
| 27 |
|
|
/* decNumber package local type, tuning, and macro definitions */
|
| 28 |
|
|
/* ------------------------------------------------------------------ */
|
| 29 |
|
|
/* This header file is included by all modules in the decNumber */
|
| 30 |
|
|
/* library, and contains local type definitions, tuning parameters, */
|
| 31 |
|
|
/* etc. It should not need to be used by application programs. */
|
| 32 |
|
|
/* decNumber.h or one of decDouble (etc.) must be included first. */
|
| 33 |
|
|
/* ------------------------------------------------------------------ */
|
| 34 |
|
|
|
| 35 |
|
|
#if !defined(DECNUMBERLOC)
|
| 36 |
|
|
#define DECNUMBERLOC
|
| 37 |
|
|
#define DECVERSION "decNumber 3.61" /* Package Version [16 max.] */
|
| 38 |
|
|
#define DECNLAUTHOR "Mike Cowlishaw" /* Who to blame */
|
| 39 |
|
|
|
| 40 |
|
|
#include <stdlib.h> /* for abs */
|
| 41 |
|
|
#include <string.h> /* for memset, strcpy */
|
| 42 |
|
|
#include "dconfig.h" /* for WORDS_BIGENDIAN */
|
| 43 |
|
|
|
| 44 |
|
|
/* Conditional code flag -- set this to match hardware platform */
|
| 45 |
|
|
/* 1=little-endian, 0=big-endian */
|
| 46 |
|
|
#if WORDS_BIGENDIAN
|
| 47 |
|
|
#define DECLITEND 0
|
| 48 |
|
|
#else
|
| 49 |
|
|
#define DECLITEND 1
|
| 50 |
|
|
#endif
|
| 51 |
|
|
|
| 52 |
|
|
#if !defined(DECLITEND)
|
| 53 |
|
|
#define DECLITEND 1 /* 1=little-endian, 0=big-endian */
|
| 54 |
|
|
#endif
|
| 55 |
|
|
|
| 56 |
|
|
/* Conditional code flag -- set this to 1 for best performance */
|
| 57 |
|
|
#if !defined(DECUSE64)
|
| 58 |
|
|
#define DECUSE64 1 /* 1=use int64s, 0=int32 & smaller only */
|
| 59 |
|
|
#endif
|
| 60 |
|
|
|
| 61 |
|
|
/* Conditional check flags -- set these to 0 for best performance */
|
| 62 |
|
|
#if !defined(DECCHECK)
|
| 63 |
|
|
#define DECCHECK 0 /* 1 to enable robust checking */
|
| 64 |
|
|
#endif
|
| 65 |
|
|
#if !defined(DECALLOC)
|
| 66 |
|
|
#define DECALLOC 0 /* 1 to enable memory accounting */
|
| 67 |
|
|
#endif
|
| 68 |
|
|
#if !defined(DECTRACE)
|
| 69 |
|
|
#define DECTRACE 0 /* 1 to trace certain internals, etc. */
|
| 70 |
|
|
#endif
|
| 71 |
|
|
|
| 72 |
|
|
/* Tuning parameter for decNumber (arbitrary precision) module */
|
| 73 |
|
|
#if !defined(DECBUFFER)
|
| 74 |
|
|
#define DECBUFFER 36 /* Size basis for local buffers. This */
|
| 75 |
|
|
/* should be a common maximum precision */
|
| 76 |
|
|
/* rounded up to a multiple of 4; must */
|
| 77 |
|
|
/* be zero or positive. */
|
| 78 |
|
|
#endif
|
| 79 |
|
|
|
| 80 |
|
|
/* ---------------------------------------------------------------- */
|
| 81 |
|
|
/* Definitions for all modules (general-purpose) */
|
| 82 |
|
|
/* ---------------------------------------------------------------- */
|
| 83 |
|
|
|
| 84 |
|
|
/* Local names for common types -- for safety, decNumber modules do */
|
| 85 |
|
|
/* not use int or long directly. */
|
| 86 |
|
|
#define Flag uint8_t
|
| 87 |
|
|
#define Byte int8_t
|
| 88 |
|
|
#define uByte uint8_t
|
| 89 |
|
|
#define Short int16_t
|
| 90 |
|
|
#define uShort uint16_t
|
| 91 |
|
|
#define Int int32_t
|
| 92 |
|
|
#define uInt uint32_t
|
| 93 |
|
|
#define Unit decNumberUnit
|
| 94 |
|
|
#if DECUSE64
|
| 95 |
|
|
#define Long int64_t
|
| 96 |
|
|
#define uLong uint64_t
|
| 97 |
|
|
#endif
|
| 98 |
|
|
|
| 99 |
|
|
/* Development-use definitions */
|
| 100 |
|
|
typedef long int LI; /* for printf arguments only */
|
| 101 |
|
|
#define DECNOINT 0 /* 1 to check no internal use of 'int' */
|
| 102 |
|
|
/* or stdint types */
|
| 103 |
|
|
#if DECNOINT
|
| 104 |
|
|
/* if these interfere with your C includes, do not set DECNOINT */
|
| 105 |
|
|
#define int ? /* enable to ensure that plain C 'int' */
|
| 106 |
|
|
#define long ?? /* .. or 'long' types are not used */
|
| 107 |
|
|
#endif
|
| 108 |
|
|
|
| 109 |
|
|
/* Shared lookup tables */
|
| 110 |
|
|
extern const uByte DECSTICKYTAB[10]; /* re-round digits if sticky */
|
| 111 |
|
|
extern const uInt DECPOWERS[10]; /* powers of ten table */
|
| 112 |
|
|
/* The following are included from decDPD.h */
|
| 113 |
|
|
#include "decDPDSymbols.h"
|
| 114 |
|
|
extern const uShort DPD2BIN[1024]; /* DPD -> 0-999 */
|
| 115 |
|
|
extern const uShort BIN2DPD[1000]; /* 0-999 -> DPD */
|
| 116 |
|
|
extern const uInt DPD2BINK[1024]; /* DPD -> 0-999000 */
|
| 117 |
|
|
extern const uInt DPD2BINM[1024]; /* DPD -> 0-999000000 */
|
| 118 |
|
|
extern const uByte DPD2BCD8[4096]; /* DPD -> ddd + len */
|
| 119 |
|
|
extern const uByte BIN2BCD8[4000]; /* 0-999 -> ddd + len */
|
| 120 |
|
|
extern const uShort BCD2DPD[2458]; /* 0-0x999 -> DPD (0x999=2457)*/
|
| 121 |
|
|
|
| 122 |
|
|
/* LONGMUL32HI -- set w=(u*v)>>32, where w, u, and v are uInts */
|
| 123 |
|
|
/* (that is, sets w to be the high-order word of the 64-bit result; */
|
| 124 |
|
|
/* the low-order word is simply u*v.) */
|
| 125 |
|
|
/* This version is derived from Knuth via Hacker's Delight; */
|
| 126 |
|
|
/* it seems to optimize better than some others tried */
|
| 127 |
|
|
#define LONGMUL32HI(w, u, v) { \
|
| 128 |
|
|
uInt u0, u1, v0, v1, w0, w1, w2, t; \
|
| 129 |
|
|
u0=u & 0xffff; u1=u>>16; \
|
| 130 |
|
|
v0=v & 0xffff; v1=v>>16; \
|
| 131 |
|
|
w0=u0*v0; \
|
| 132 |
|
|
t=u1*v0 + (w0>>16); \
|
| 133 |
|
|
w1=t & 0xffff; w2=t>>16; \
|
| 134 |
|
|
w1=u0*v1 + w1; \
|
| 135 |
|
|
(w)=u1*v1 + w2 + (w1>>16);}
|
| 136 |
|
|
|
| 137 |
|
|
/* ROUNDUP -- round an integer up to a multiple of n */
|
| 138 |
|
|
#define ROUNDUP(i, n) ((((i)+(n)-1)/n)*n)
|
| 139 |
|
|
#define ROUNDUP4(i) (((i)+3)&~3) /* special for n=4 */
|
| 140 |
|
|
|
| 141 |
|
|
/* ROUNDDOWN -- round an integer down to a multiple of n */
|
| 142 |
|
|
#define ROUNDDOWN(i, n) (((i)/n)*n)
|
| 143 |
|
|
#define ROUNDDOWN4(i) ((i)&~3) /* special for n=4 */
|
| 144 |
|
|
|
| 145 |
|
|
/* References to multi-byte sequences under different sizes; these */
|
| 146 |
|
|
/* require locally declared variables, but do not violate strict */
|
| 147 |
|
|
/* aliasing or alignment (as did the UINTAT simple cast to uInt). */
|
| 148 |
|
|
/* Variables needed are uswork, uiwork, etc. [so do not use at same */
|
| 149 |
|
|
/* level in an expression, e.g., UBTOUI(x)==UBTOUI(y) may fail]. */
|
| 150 |
|
|
|
| 151 |
|
|
/* Return a uInt, etc., from bytes starting at a char* or uByte* */
|
| 152 |
|
|
#define UBTOUS(b) (memcpy((void *)&uswork, b, 2), uswork)
|
| 153 |
|
|
#define UBTOUI(b) (memcpy((void *)&uiwork, b, 4), uiwork)
|
| 154 |
|
|
|
| 155 |
|
|
/* Store a uInt, etc., into bytes starting at a char* or uByte*. */
|
| 156 |
|
|
/* Returns i, evaluated, for convenience; has to use uiwork because */
|
| 157 |
|
|
/* i may be an expression. */
|
| 158 |
|
|
#define UBFROMUS(b, i) (uswork=(i), memcpy(b, (void *)&uswork, 2), uswork)
|
| 159 |
|
|
#define UBFROMUI(b, i) (uiwork=(i), memcpy(b, (void *)&uiwork, 4), uiwork)
|
| 160 |
|
|
|
| 161 |
|
|
/* X10 and X100 -- multiply integer i by 10 or 100 */
|
| 162 |
|
|
/* [shifts are usually faster than multiply; could be conditional] */
|
| 163 |
|
|
#define X10(i) (((i)<<1)+((i)<<3))
|
| 164 |
|
|
#define X100(i) (((i)<<2)+((i)<<5)+((i)<<6))
|
| 165 |
|
|
|
| 166 |
|
|
/* MAXI and MINI -- general max & min (not in ANSI) for integers */
|
| 167 |
|
|
#define MAXI(x,y) ((x)<(y)?(y):(x))
|
| 168 |
|
|
#define MINI(x,y) ((x)>(y)?(y):(x))
|
| 169 |
|
|
|
| 170 |
|
|
/* Useful constants */
|
| 171 |
|
|
#define BILLION 1000000000 /* 10**9 */
|
| 172 |
|
|
/* CHARMASK: 0x30303030 for ASCII/UTF8; 0xF0F0F0F0 for EBCDIC */
|
| 173 |
|
|
#define CHARMASK ((((((((uInt)'0')<<8)+'0')<<8)+'0')<<8)+'0')
|
| 174 |
|
|
|
| 175 |
|
|
|
| 176 |
|
|
/* ---------------------------------------------------------------- */
|
| 177 |
|
|
/* Definitions for arbitary-precision modules (only valid after */
|
| 178 |
|
|
/* decNumber.h has been included) */
|
| 179 |
|
|
/* ---------------------------------------------------------------- */
|
| 180 |
|
|
|
| 181 |
|
|
/* Limits and constants */
|
| 182 |
|
|
#define DECNUMMAXP 999999999 /* maximum precision code can handle */
|
| 183 |
|
|
#define DECNUMMAXE 999999999 /* maximum adjusted exponent ditto */
|
| 184 |
|
|
#define DECNUMMINE -999999999 /* minimum adjusted exponent ditto */
|
| 185 |
|
|
#if (DECNUMMAXP != DEC_MAX_DIGITS)
|
| 186 |
|
|
#error Maximum digits mismatch
|
| 187 |
|
|
#endif
|
| 188 |
|
|
#if (DECNUMMAXE != DEC_MAX_EMAX)
|
| 189 |
|
|
#error Maximum exponent mismatch
|
| 190 |
|
|
#endif
|
| 191 |
|
|
#if (DECNUMMINE != DEC_MIN_EMIN)
|
| 192 |
|
|
#error Minimum exponent mismatch
|
| 193 |
|
|
#endif
|
| 194 |
|
|
|
| 195 |
|
|
/* Set DECDPUNMAX -- the maximum integer that fits in DECDPUN */
|
| 196 |
|
|
/* digits, and D2UTABLE -- the initializer for the D2U table */
|
| 197 |
|
|
#if DECDPUN==1
|
| 198 |
|
|
#define DECDPUNMAX 9
|
| 199 |
|
|
#define D2UTABLE {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17, \
|
| 200 |
|
|
18,19,20,21,22,23,24,25,26,27,28,29,30,31,32, \
|
| 201 |
|
|
33,34,35,36,37,38,39,40,41,42,43,44,45,46,47, \
|
| 202 |
|
|
48,49}
|
| 203 |
|
|
#elif DECDPUN==2
|
| 204 |
|
|
#define DECDPUNMAX 99
|
| 205 |
|
|
#define D2UTABLE {0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10, \
|
| 206 |
|
|
11,11,12,12,13,13,14,14,15,15,16,16,17,17,18, \
|
| 207 |
|
|
18,19,19,20,20,21,21,22,22,23,23,24,24,25}
|
| 208 |
|
|
#elif DECDPUN==3
|
| 209 |
|
|
#define DECDPUNMAX 999
|
| 210 |
|
|
#define D2UTABLE {0,1,1,1,2,2,2,3,3,3,4,4,4,5,5,5,6,6,6,7,7,7, \
|
| 211 |
|
|
8,8,8,9,9,9,10,10,10,11,11,11,12,12,12,13,13, \
|
| 212 |
|
|
13,14,14,14,15,15,15,16,16,16,17}
|
| 213 |
|
|
#elif DECDPUN==4
|
| 214 |
|
|
#define DECDPUNMAX 9999
|
| 215 |
|
|
#define D2UTABLE {0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,6, \
|
| 216 |
|
|
6,6,6,7,7,7,7,8,8,8,8,9,9,9,9,10,10,10,10,11, \
|
| 217 |
|
|
11,11,11,12,12,12,12,13}
|
| 218 |
|
|
#elif DECDPUN==5
|
| 219 |
|
|
#define DECDPUNMAX 99999
|
| 220 |
|
|
#define D2UTABLE {0,1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,4,4,4,4,4,5, \
|
| 221 |
|
|
5,5,5,5,6,6,6,6,6,7,7,7,7,7,8,8,8,8,8,9,9,9, \
|
| 222 |
|
|
9,9,10,10,10,10}
|
| 223 |
|
|
#elif DECDPUN==6
|
| 224 |
|
|
#define DECDPUNMAX 999999
|
| 225 |
|
|
#define D2UTABLE {0,1,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,3,4,4,4, \
|
| 226 |
|
|
4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,7,7,7,7,7,7,8, \
|
| 227 |
|
|
8,8,8,8,8,9}
|
| 228 |
|
|
#elif DECDPUN==7
|
| 229 |
|
|
#define DECDPUNMAX 9999999
|
| 230 |
|
|
#define D2UTABLE {0,1,1,1,1,1,1,1,2,2,2,2,2,2,2,3,3,3,3,3,3,3, \
|
| 231 |
|
|
4,4,4,4,4,4,4,5,5,5,5,5,5,5,6,6,6,6,6,6,6,7, \
|
| 232 |
|
|
7,7,7,7,7,7}
|
| 233 |
|
|
#elif DECDPUN==8
|
| 234 |
|
|
#define DECDPUNMAX 99999999
|
| 235 |
|
|
#define D2UTABLE {0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3, \
|
| 236 |
|
|
3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,6,6,6, \
|
| 237 |
|
|
6,6,6,6,6,7}
|
| 238 |
|
|
#elif DECDPUN==9
|
| 239 |
|
|
#define DECDPUNMAX 999999999
|
| 240 |
|
|
#define D2UTABLE {0,1,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,3,3,3, \
|
| 241 |
|
|
3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5, \
|
| 242 |
|
|
5,5,6,6,6,6}
|
| 243 |
|
|
#elif defined(DECDPUN)
|
| 244 |
|
|
#error DECDPUN must be in the range 1-9
|
| 245 |
|
|
#endif
|
| 246 |
|
|
|
| 247 |
|
|
/* ----- Shared data (in decNumber.c) ----- */
|
| 248 |
|
|
/* Public lookup table used by the D2U macro (see below) */
|
| 249 |
|
|
#define DECMAXD2U 49
|
| 250 |
|
|
extern const uByte d2utable[DECMAXD2U+1];
|
| 251 |
|
|
|
| 252 |
|
|
/* ----- Macros ----- */
|
| 253 |
|
|
/* ISZERO -- return true if decNumber dn is a zero */
|
| 254 |
|
|
/* [performance-critical in some situations] */
|
| 255 |
|
|
#define ISZERO(dn) decNumberIsZero(dn) /* now just a local name */
|
| 256 |
|
|
|
| 257 |
|
|
/* D2U -- return the number of Units needed to hold d digits */
|
| 258 |
|
|
/* (runtime version, with table lookaside for small d) */
|
| 259 |
|
|
#if DECDPUN==8
|
| 260 |
|
|
#define D2U(d) ((unsigned)((d)<=DECMAXD2U?d2utable[d]:((d)+7)>>3))
|
| 261 |
|
|
#elif DECDPUN==4
|
| 262 |
|
|
#define D2U(d) ((unsigned)((d)<=DECMAXD2U?d2utable[d]:((d)+3)>>2))
|
| 263 |
|
|
#else
|
| 264 |
|
|
#define D2U(d) ((d)<=DECMAXD2U?d2utable[d]:((d)+DECDPUN-1)/DECDPUN)
|
| 265 |
|
|
#endif
|
| 266 |
|
|
/* SD2U -- static D2U macro (for compile-time calculation) */
|
| 267 |
|
|
#define SD2U(d) (((d)+DECDPUN-1)/DECDPUN)
|
| 268 |
|
|
|
| 269 |
|
|
/* MSUDIGITS -- returns digits in msu, from digits, calculated */
|
| 270 |
|
|
/* using D2U */
|
| 271 |
|
|
#define MSUDIGITS(d) ((d)-(D2U(d)-1)*DECDPUN)
|
| 272 |
|
|
|
| 273 |
|
|
/* D2N -- return the number of decNumber structs that would be */
|
| 274 |
|
|
/* needed to contain that number of digits (and the initial */
|
| 275 |
|
|
/* decNumber struct) safely. Note that one Unit is included in the */
|
| 276 |
|
|
/* initial structure. Used for allocating space that is aligned on */
|
| 277 |
|
|
/* a decNumber struct boundary. */
|
| 278 |
|
|
#define D2N(d) \
|
| 279 |
|
|
((((SD2U(d)-1)*sizeof(Unit))+sizeof(decNumber)*2-1)/sizeof(decNumber))
|
| 280 |
|
|
|
| 281 |
|
|
/* TODIGIT -- macro to remove the leading digit from the unsigned */
|
| 282 |
|
|
/* integer u at column cut (counting from the right, LSD=0) and */
|
| 283 |
|
|
/* place it as an ASCII character into the character pointed to by */
|
| 284 |
|
|
/* c. Note that cut must be <= 9, and the maximum value for u is */
|
| 285 |
|
|
/* 2,000,000,000 (as is needed for negative exponents of */
|
| 286 |
|
|
/* subnormals). The unsigned integer pow is used as a temporary */
|
| 287 |
|
|
/* variable. */
|
| 288 |
|
|
#define TODIGIT(u, cut, c, pow) { \
|
| 289 |
|
|
*(c)='0'; \
|
| 290 |
|
|
pow=DECPOWERS[cut]*2; \
|
| 291 |
|
|
if ((u)>pow) { \
|
| 292 |
|
|
pow*=4; \
|
| 293 |
|
|
if ((u)>=pow) {(u)-=pow; *(c)+=8;} \
|
| 294 |
|
|
pow/=2; \
|
| 295 |
|
|
if ((u)>=pow) {(u)-=pow; *(c)+=4;} \
|
| 296 |
|
|
pow/=2; \
|
| 297 |
|
|
} \
|
| 298 |
|
|
if ((u)>=pow) {(u)-=pow; *(c)+=2;} \
|
| 299 |
|
|
pow/=2; \
|
| 300 |
|
|
if ((u)>=pow) {(u)-=pow; *(c)+=1;} \
|
| 301 |
|
|
}
|
| 302 |
|
|
|
| 303 |
|
|
/* ---------------------------------------------------------------- */
|
| 304 |
|
|
/* Definitions for fixed-precision modules (only valid after */
|
| 305 |
|
|
/* decSingle.h, decDouble.h, or decQuad.h has been included) */
|
| 306 |
|
|
/* ---------------------------------------------------------------- */
|
| 307 |
|
|
|
| 308 |
|
|
/* bcdnum -- a structure describing a format-independent finite */
|
| 309 |
|
|
/* number, whose coefficient is a string of bcd8 uBytes */
|
| 310 |
|
|
typedef struct {
|
| 311 |
|
|
uByte *msd; /* -> most significant digit */
|
| 312 |
|
|
uByte *lsd; /* -> least ditto */
|
| 313 |
|
|
uInt sign; /* 0=positive, DECFLOAT_Sign=negative */
|
| 314 |
|
|
Int exponent; /* Unadjusted signed exponent (q), or */
|
| 315 |
|
|
/* DECFLOAT_NaN etc. for a special */
|
| 316 |
|
|
} bcdnum;
|
| 317 |
|
|
|
| 318 |
|
|
/* Test if exponent or bcdnum exponent must be a special, etc. */
|
| 319 |
|
|
#define EXPISSPECIAL(exp) ((exp)>=DECFLOAT_MinSp)
|
| 320 |
|
|
#define EXPISINF(exp) (exp==DECFLOAT_Inf)
|
| 321 |
|
|
#define EXPISNAN(exp) (exp==DECFLOAT_qNaN || exp==DECFLOAT_sNaN)
|
| 322 |
|
|
#define NUMISSPECIAL(num) (EXPISSPECIAL((num)->exponent))
|
| 323 |
|
|
|
| 324 |
|
|
/* Refer to a 32-bit word or byte in a decFloat (df) by big-endian */
|
| 325 |
|
|
/* (array) notation (the 0 word or byte contains the sign bit), */
|
| 326 |
|
|
/* automatically adjusting for endianness; similarly address a word */
|
| 327 |
|
|
/* in the next-wider format (decFloatWider, or dfw) */
|
| 328 |
|
|
#define DECWORDS (DECBYTES/4)
|
| 329 |
|
|
#define DECWWORDS (DECWBYTES/4)
|
| 330 |
|
|
#if DECLITEND
|
| 331 |
|
|
#define DFBYTE(df, off) ((df)->bytes[DECBYTES-1-(off)])
|
| 332 |
|
|
#define DFWORD(df, off) ((df)->words[DECWORDS-1-(off)])
|
| 333 |
|
|
#define DFWWORD(dfw, off) ((dfw)->words[DECWWORDS-1-(off)])
|
| 334 |
|
|
#else
|
| 335 |
|
|
#define DFBYTE(df, off) ((df)->bytes[off])
|
| 336 |
|
|
#define DFWORD(df, off) ((df)->words[off])
|
| 337 |
|
|
#define DFWWORD(dfw, off) ((dfw)->words[off])
|
| 338 |
|
|
#endif
|
| 339 |
|
|
|
| 340 |
|
|
/* Tests for sign or specials, directly on DECFLOATs */
|
| 341 |
|
|
#define DFISSIGNED(df) (DFWORD(df, 0)&0x80000000)
|
| 342 |
|
|
#define DFISSPECIAL(df) ((DFWORD(df, 0)&0x78000000)==0x78000000)
|
| 343 |
|
|
#define DFISINF(df) ((DFWORD(df, 0)&0x7c000000)==0x78000000)
|
| 344 |
|
|
#define DFISNAN(df) ((DFWORD(df, 0)&0x7c000000)==0x7c000000)
|
| 345 |
|
|
#define DFISQNAN(df) ((DFWORD(df, 0)&0x7e000000)==0x7c000000)
|
| 346 |
|
|
#define DFISSNAN(df) ((DFWORD(df, 0)&0x7e000000)==0x7e000000)
|
| 347 |
|
|
|
| 348 |
|
|
/* Shared lookup tables */
|
| 349 |
|
|
#include "decCommonSymbols.h"
|
| 350 |
|
|
extern const uInt DECCOMBMSD[64]; /* Combination field -> MSD */
|
| 351 |
|
|
extern const uInt DECCOMBFROM[48]; /* exp+msd -> Combination */
|
| 352 |
|
|
|
| 353 |
|
|
/* Private generic (utility) routine */
|
| 354 |
|
|
#if DECCHECK || DECTRACE
|
| 355 |
|
|
extern void decShowNum(const bcdnum *, const char *);
|
| 356 |
|
|
#endif
|
| 357 |
|
|
|
| 358 |
|
|
/* Format-dependent macros and constants */
|
| 359 |
|
|
#if defined(DECPMAX)
|
| 360 |
|
|
|
| 361 |
|
|
/* Useful constants */
|
| 362 |
|
|
#define DECPMAX9 (ROUNDUP(DECPMAX, 9)/9) /* 'Pmax' in 10**9s */
|
| 363 |
|
|
/* Top words for a zero */
|
| 364 |
|
|
#define SINGLEZERO 0x22500000
|
| 365 |
|
|
#define DOUBLEZERO 0x22380000
|
| 366 |
|
|
#define QUADZERO 0x22080000
|
| 367 |
|
|
/* [ZEROWORD is defined to be one of these in the DFISZERO macro] */
|
| 368 |
|
|
|
| 369 |
|
|
/* Format-dependent common tests: */
|
| 370 |
|
|
/* DFISZERO -- test for (any) zero */
|
| 371 |
|
|
/* DFISCCZERO -- test for coefficient continuation being zero */
|
| 372 |
|
|
/* DFISCC01 -- test for coefficient contains only 0s and 1s */
|
| 373 |
|
|
/* DFISINT -- test for finite and exponent q=0 */
|
| 374 |
|
|
/* DFISUINT01 -- test for sign=0, finite, exponent q=0, and */
|
| 375 |
|
|
/* MSD=0 or 1 */
|
| 376 |
|
|
/* ZEROWORD is also defined here. */
|
| 377 |
|
|
/* In DFISZERO the first test checks the least-significant word */
|
| 378 |
|
|
/* (most likely to be non-zero); the penultimate tests MSD and */
|
| 379 |
|
|
/* DPDs in the signword, and the final test excludes specials and */
|
| 380 |
|
|
/* MSD>7. DFISINT similarly has to allow for the two forms of */
|
| 381 |
|
|
/* MSD codes. DFISUINT01 only has to allow for one form of MSD */
|
| 382 |
|
|
/* code. */
|
| 383 |
|
|
#if DECPMAX==7
|
| 384 |
|
|
#define ZEROWORD SINGLEZERO
|
| 385 |
|
|
/* [test macros not needed except for Zero] */
|
| 386 |
|
|
#define DFISZERO(df) ((DFWORD(df, 0)&0x1c0fffff)==0 \
|
| 387 |
|
|
&& (DFWORD(df, 0)&0x60000000)!=0x60000000)
|
| 388 |
|
|
#elif DECPMAX==16
|
| 389 |
|
|
#define ZEROWORD DOUBLEZERO
|
| 390 |
|
|
#define DFISZERO(df) ((DFWORD(df, 1)==0 \
|
| 391 |
|
|
&& (DFWORD(df, 0)&0x1c03ffff)==0 \
|
| 392 |
|
|
&& (DFWORD(df, 0)&0x60000000)!=0x60000000))
|
| 393 |
|
|
#define DFISINT(df) ((DFWORD(df, 0)&0x63fc0000)==0x22380000 \
|
| 394 |
|
|
||(DFWORD(df, 0)&0x7bfc0000)==0x6a380000)
|
| 395 |
|
|
#define DFISUINT01(df) ((DFWORD(df, 0)&0xfbfc0000)==0x22380000)
|
| 396 |
|
|
#define DFISCCZERO(df) (DFWORD(df, 1)==0 \
|
| 397 |
|
|
&& (DFWORD(df, 0)&0x0003ffff)==0)
|
| 398 |
|
|
#define DFISCC01(df) ((DFWORD(df, 0)&~0xfffc9124)==0 \
|
| 399 |
|
|
&& (DFWORD(df, 1)&~0x49124491)==0)
|
| 400 |
|
|
#elif DECPMAX==34
|
| 401 |
|
|
#define ZEROWORD QUADZERO
|
| 402 |
|
|
#define DFISZERO(df) ((DFWORD(df, 3)==0 \
|
| 403 |
|
|
&& DFWORD(df, 2)==0 \
|
| 404 |
|
|
&& DFWORD(df, 1)==0 \
|
| 405 |
|
|
&& (DFWORD(df, 0)&0x1c003fff)==0 \
|
| 406 |
|
|
&& (DFWORD(df, 0)&0x60000000)!=0x60000000))
|
| 407 |
|
|
#define DFISINT(df) ((DFWORD(df, 0)&0x63ffc000)==0x22080000 \
|
| 408 |
|
|
||(DFWORD(df, 0)&0x7bffc000)==0x6a080000)
|
| 409 |
|
|
#define DFISUINT01(df) ((DFWORD(df, 0)&0xfbffc000)==0x22080000)
|
| 410 |
|
|
#define DFISCCZERO(df) (DFWORD(df, 3)==0 \
|
| 411 |
|
|
&& DFWORD(df, 2)==0 \
|
| 412 |
|
|
&& DFWORD(df, 1)==0 \
|
| 413 |
|
|
&& (DFWORD(df, 0)&0x00003fff)==0)
|
| 414 |
|
|
|
| 415 |
|
|
#define DFISCC01(df) ((DFWORD(df, 0)&~0xffffc912)==0 \
|
| 416 |
|
|
&& (DFWORD(df, 1)&~0x44912449)==0 \
|
| 417 |
|
|
&& (DFWORD(df, 2)&~0x12449124)==0 \
|
| 418 |
|
|
&& (DFWORD(df, 3)&~0x49124491)==0)
|
| 419 |
|
|
#endif
|
| 420 |
|
|
|
| 421 |
|
|
/* Macros to test if a certain 10 bits of a uInt or pair of uInts */
|
| 422 |
|
|
/* are a canonical declet [higher or lower bits are ignored]. */
|
| 423 |
|
|
/* declet is at offset 0 (from the right) in a uInt: */
|
| 424 |
|
|
#define CANONDPD(dpd) (((dpd)&0x300)==0 || ((dpd)&0x6e)!=0x6e)
|
| 425 |
|
|
/* declet is at offset k (a multiple of 2) in a uInt: */
|
| 426 |
|
|
#define CANONDPDOFF(dpd, k) (((dpd)&(0x300<<(k)))==0 \
|
| 427 |
|
|
|| ((dpd)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k)))
|
| 428 |
|
|
/* declet is at offset k (a multiple of 2) in a pair of uInts: */
|
| 429 |
|
|
/* [the top 2 bits will always be in the more-significant uInt] */
|
| 430 |
|
|
#define CANONDPDTWO(hi, lo, k) (((hi)&(0x300>>(32-(k))))==0 \
|
| 431 |
|
|
|| ((hi)&(0x6e>>(32-(k))))!=(0x6e>>(32-(k))) \
|
| 432 |
|
|
|| ((lo)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k)))
|
| 433 |
|
|
|
| 434 |
|
|
/* Macro to test whether a full-length (length DECPMAX) BCD8 */
|
| 435 |
|
|
/* coefficient, starting at uByte u, is all zeros */
|
| 436 |
|
|
/* Test just the LSWord first, then the remainder as a sequence */
|
| 437 |
|
|
/* of tests in order to avoid same-level use of UBTOUI */
|
| 438 |
|
|
#if DECPMAX==7
|
| 439 |
|
|
#define ISCOEFFZERO(u) ( \
|
| 440 |
|
|
UBTOUI((u)+DECPMAX-4)==0 \
|
| 441 |
|
|
&& UBTOUS((u)+DECPMAX-6)==0 \
|
| 442 |
|
|
&& *(u)==0)
|
| 443 |
|
|
#elif DECPMAX==16
|
| 444 |
|
|
#define ISCOEFFZERO(u) ( \
|
| 445 |
|
|
UBTOUI((u)+DECPMAX-4)==0 \
|
| 446 |
|
|
&& UBTOUI((u)+DECPMAX-8)==0 \
|
| 447 |
|
|
&& UBTOUI((u)+DECPMAX-12)==0 \
|
| 448 |
|
|
&& UBTOUI(u)==0)
|
| 449 |
|
|
#elif DECPMAX==34
|
| 450 |
|
|
#define ISCOEFFZERO(u) ( \
|
| 451 |
|
|
UBTOUI((u)+DECPMAX-4)==0 \
|
| 452 |
|
|
&& UBTOUI((u)+DECPMAX-8)==0 \
|
| 453 |
|
|
&& UBTOUI((u)+DECPMAX-12)==0 \
|
| 454 |
|
|
&& UBTOUI((u)+DECPMAX-16)==0 \
|
| 455 |
|
|
&& UBTOUI((u)+DECPMAX-20)==0 \
|
| 456 |
|
|
&& UBTOUI((u)+DECPMAX-24)==0 \
|
| 457 |
|
|
&& UBTOUI((u)+DECPMAX-28)==0 \
|
| 458 |
|
|
&& UBTOUI((u)+DECPMAX-32)==0 \
|
| 459 |
|
|
&& UBTOUS(u)==0)
|
| 460 |
|
|
#endif
|
| 461 |
|
|
|
| 462 |
|
|
/* Macros and masks for the exponent continuation field and MSD */
|
| 463 |
|
|
/* Get the exponent continuation from a decFloat *df as an Int */
|
| 464 |
|
|
#define GETECON(df) ((Int)((DFWORD((df), 0)&0x03ffffff)>>(32-6-DECECONL)))
|
| 465 |
|
|
/* Ditto, from the next-wider format */
|
| 466 |
|
|
#define GETWECON(df) ((Int)((DFWWORD((df), 0)&0x03ffffff)>>(32-6-DECWECONL)))
|
| 467 |
|
|
/* Get the biased exponent similarly */
|
| 468 |
|
|
#define GETEXP(df) ((Int)(DECCOMBEXP[DFWORD((df), 0)>>26]+GETECON(df)))
|
| 469 |
|
|
/* Get the unbiased exponent similarly */
|
| 470 |
|
|
#define GETEXPUN(df) ((Int)GETEXP(df)-DECBIAS)
|
| 471 |
|
|
/* Get the MSD similarly (as uInt) */
|
| 472 |
|
|
#define GETMSD(df) (DECCOMBMSD[DFWORD((df), 0)>>26])
|
| 473 |
|
|
|
| 474 |
|
|
/* Compile-time computes of the exponent continuation field masks */
|
| 475 |
|
|
/* full exponent continuation field: */
|
| 476 |
|
|
#define ECONMASK ((0x03ffffff>>(32-6-DECECONL))<<(32-6-DECECONL))
|
| 477 |
|
|
/* same, not including its first digit (the qNaN/sNaN selector): */
|
| 478 |
|
|
#define ECONNANMASK ((0x01ffffff>>(32-6-DECECONL))<<(32-6-DECECONL))
|
| 479 |
|
|
|
| 480 |
|
|
/* Macros to decode the coefficient in a finite decFloat *df into */
|
| 481 |
|
|
/* a BCD string (uByte *bcdin) of length DECPMAX uBytes. */
|
| 482 |
|
|
|
| 483 |
|
|
/* In-line sequence to convert least significant 10 bits of uInt */
|
| 484 |
|
|
/* dpd to three BCD8 digits starting at uByte u. Note that an */
|
| 485 |
|
|
/* extra byte is written to the right of the three digits because */
|
| 486 |
|
|
/* four bytes are moved at a time for speed; the alternative */
|
| 487 |
|
|
/* macro moves exactly three bytes (usually slower). */
|
| 488 |
|
|
#define dpd2bcd8(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 4)
|
| 489 |
|
|
#define dpd2bcd83(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 3)
|
| 490 |
|
|
|
| 491 |
|
|
/* Decode the declets. After extracting each one, it is decoded */
|
| 492 |
|
|
/* to BCD8 using a table lookup (also used for variable-length */
|
| 493 |
|
|
/* decode). Each DPD decode is 3 bytes BCD8 plus a one-byte */
|
| 494 |
|
|
/* length which is not used, here). Fixed-length 4-byte moves */
|
| 495 |
|
|
/* are fast, however, almost everywhere, and so are used except */
|
| 496 |
|
|
/* for the final three bytes (to avoid overrun). The code below */
|
| 497 |
|
|
/* is 36 instructions for Doubles and about 70 for Quads, even */
|
| 498 |
|
|
/* on IA32. */
|
| 499 |
|
|
|
| 500 |
|
|
/* Two macros are defined for each format: */
|
| 501 |
|
|
/* GETCOEFF extracts the coefficient of the current format */
|
| 502 |
|
|
/* GETWCOEFF extracts the coefficient of the next-wider format. */
|
| 503 |
|
|
/* The latter is a copy of the next-wider GETCOEFF using DFWWORD. */
|
| 504 |
|
|
|
| 505 |
|
|
#if DECPMAX==7
|
| 506 |
|
|
#define GETCOEFF(df, bcd) { \
|
| 507 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 508 |
|
|
*(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \
|
| 509 |
|
|
dpd2bcd8(bcd+1, sourhi>>10); \
|
| 510 |
|
|
dpd2bcd83(bcd+4, sourhi);}
|
| 511 |
|
|
#define GETWCOEFF(df, bcd) { \
|
| 512 |
|
|
uInt sourhi=DFWWORD(df, 0); \
|
| 513 |
|
|
uInt sourlo=DFWWORD(df, 1); \
|
| 514 |
|
|
*(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \
|
| 515 |
|
|
dpd2bcd8(bcd+1, sourhi>>8); \
|
| 516 |
|
|
dpd2bcd8(bcd+4, (sourhi<<2) | (sourlo>>30)); \
|
| 517 |
|
|
dpd2bcd8(bcd+7, sourlo>>20); \
|
| 518 |
|
|
dpd2bcd8(bcd+10, sourlo>>10); \
|
| 519 |
|
|
dpd2bcd83(bcd+13, sourlo);}
|
| 520 |
|
|
|
| 521 |
|
|
#elif DECPMAX==16
|
| 522 |
|
|
#define GETCOEFF(df, bcd) { \
|
| 523 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 524 |
|
|
uInt sourlo=DFWORD(df, 1); \
|
| 525 |
|
|
*(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \
|
| 526 |
|
|
dpd2bcd8(bcd+1, sourhi>>8); \
|
| 527 |
|
|
dpd2bcd8(bcd+4, (sourhi<<2) | (sourlo>>30)); \
|
| 528 |
|
|
dpd2bcd8(bcd+7, sourlo>>20); \
|
| 529 |
|
|
dpd2bcd8(bcd+10, sourlo>>10); \
|
| 530 |
|
|
dpd2bcd83(bcd+13, sourlo);}
|
| 531 |
|
|
#define GETWCOEFF(df, bcd) { \
|
| 532 |
|
|
uInt sourhi=DFWWORD(df, 0); \
|
| 533 |
|
|
uInt sourmh=DFWWORD(df, 1); \
|
| 534 |
|
|
uInt sourml=DFWWORD(df, 2); \
|
| 535 |
|
|
uInt sourlo=DFWWORD(df, 3); \
|
| 536 |
|
|
*(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \
|
| 537 |
|
|
dpd2bcd8(bcd+1, sourhi>>4); \
|
| 538 |
|
|
dpd2bcd8(bcd+4, ((sourhi)<<6) | (sourmh>>26)); \
|
| 539 |
|
|
dpd2bcd8(bcd+7, sourmh>>16); \
|
| 540 |
|
|
dpd2bcd8(bcd+10, sourmh>>6); \
|
| 541 |
|
|
dpd2bcd8(bcd+13, ((sourmh)<<4) | (sourml>>28)); \
|
| 542 |
|
|
dpd2bcd8(bcd+16, sourml>>18); \
|
| 543 |
|
|
dpd2bcd8(bcd+19, sourml>>8); \
|
| 544 |
|
|
dpd2bcd8(bcd+22, ((sourml)<<2) | (sourlo>>30)); \
|
| 545 |
|
|
dpd2bcd8(bcd+25, sourlo>>20); \
|
| 546 |
|
|
dpd2bcd8(bcd+28, sourlo>>10); \
|
| 547 |
|
|
dpd2bcd83(bcd+31, sourlo);}
|
| 548 |
|
|
|
| 549 |
|
|
#elif DECPMAX==34
|
| 550 |
|
|
#define GETCOEFF(df, bcd) { \
|
| 551 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 552 |
|
|
uInt sourmh=DFWORD(df, 1); \
|
| 553 |
|
|
uInt sourml=DFWORD(df, 2); \
|
| 554 |
|
|
uInt sourlo=DFWORD(df, 3); \
|
| 555 |
|
|
*(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \
|
| 556 |
|
|
dpd2bcd8(bcd+1, sourhi>>4); \
|
| 557 |
|
|
dpd2bcd8(bcd+4, ((sourhi)<<6) | (sourmh>>26)); \
|
| 558 |
|
|
dpd2bcd8(bcd+7, sourmh>>16); \
|
| 559 |
|
|
dpd2bcd8(bcd+10, sourmh>>6); \
|
| 560 |
|
|
dpd2bcd8(bcd+13, ((sourmh)<<4) | (sourml>>28)); \
|
| 561 |
|
|
dpd2bcd8(bcd+16, sourml>>18); \
|
| 562 |
|
|
dpd2bcd8(bcd+19, sourml>>8); \
|
| 563 |
|
|
dpd2bcd8(bcd+22, ((sourml)<<2) | (sourlo>>30)); \
|
| 564 |
|
|
dpd2bcd8(bcd+25, sourlo>>20); \
|
| 565 |
|
|
dpd2bcd8(bcd+28, sourlo>>10); \
|
| 566 |
|
|
dpd2bcd83(bcd+31, sourlo);}
|
| 567 |
|
|
|
| 568 |
|
|
#define GETWCOEFF(df, bcd) {??} /* [should never be used] */
|
| 569 |
|
|
#endif
|
| 570 |
|
|
|
| 571 |
|
|
/* Macros to decode the coefficient in a finite decFloat *df into */
|
| 572 |
|
|
/* a base-billion uInt array, with the least-significant */
|
| 573 |
|
|
/* 0-999999999 'digit' at offset 0. */
|
| 574 |
|
|
|
| 575 |
|
|
/* Decode the declets. After extracting each one, it is decoded */
|
| 576 |
|
|
/* to binary using a table lookup. Three tables are used; one */
|
| 577 |
|
|
/* the usual DPD to binary, the other two pre-multiplied by 1000 */
|
| 578 |
|
|
/* and 1000000 to avoid multiplication during decode. These */
|
| 579 |
|
|
/* tables can also be used for multiplying up the MSD as the DPD */
|
| 580 |
|
|
/* code for 0 through 9 is the identity. */
|
| 581 |
|
|
#define DPD2BIN0 DPD2BIN /* for prettier code */
|
| 582 |
|
|
|
| 583 |
|
|
#if DECPMAX==7
|
| 584 |
|
|
#define GETCOEFFBILL(df, buf) { \
|
| 585 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 586 |
|
|
(buf)[0]=DPD2BIN0[sourhi&0x3ff] \
|
| 587 |
|
|
+DPD2BINK[(sourhi>>10)&0x3ff] \
|
| 588 |
|
|
+DPD2BINM[DECCOMBMSD[sourhi>>26]];}
|
| 589 |
|
|
|
| 590 |
|
|
#elif DECPMAX==16
|
| 591 |
|
|
#define GETCOEFFBILL(df, buf) { \
|
| 592 |
|
|
uInt sourhi, sourlo; \
|
| 593 |
|
|
sourlo=DFWORD(df, 1); \
|
| 594 |
|
|
(buf)[0]=DPD2BIN0[sourlo&0x3ff] \
|
| 595 |
|
|
+DPD2BINK[(sourlo>>10)&0x3ff] \
|
| 596 |
|
|
+DPD2BINM[(sourlo>>20)&0x3ff]; \
|
| 597 |
|
|
sourhi=DFWORD(df, 0); \
|
| 598 |
|
|
(buf)[1]=DPD2BIN0[((sourhi<<2) | (sourlo>>30))&0x3ff] \
|
| 599 |
|
|
+DPD2BINK[(sourhi>>8)&0x3ff] \
|
| 600 |
|
|
+DPD2BINM[DECCOMBMSD[sourhi>>26]];}
|
| 601 |
|
|
|
| 602 |
|
|
#elif DECPMAX==34
|
| 603 |
|
|
#define GETCOEFFBILL(df, buf) { \
|
| 604 |
|
|
uInt sourhi, sourmh, sourml, sourlo; \
|
| 605 |
|
|
sourlo=DFWORD(df, 3); \
|
| 606 |
|
|
(buf)[0]=DPD2BIN0[sourlo&0x3ff] \
|
| 607 |
|
|
+DPD2BINK[(sourlo>>10)&0x3ff] \
|
| 608 |
|
|
+DPD2BINM[(sourlo>>20)&0x3ff]; \
|
| 609 |
|
|
sourml=DFWORD(df, 2); \
|
| 610 |
|
|
(buf)[1]=DPD2BIN0[((sourml<<2) | (sourlo>>30))&0x3ff] \
|
| 611 |
|
|
+DPD2BINK[(sourml>>8)&0x3ff] \
|
| 612 |
|
|
+DPD2BINM[(sourml>>18)&0x3ff]; \
|
| 613 |
|
|
sourmh=DFWORD(df, 1); \
|
| 614 |
|
|
(buf)[2]=DPD2BIN0[((sourmh<<4) | (sourml>>28))&0x3ff] \
|
| 615 |
|
|
+DPD2BINK[(sourmh>>6)&0x3ff] \
|
| 616 |
|
|
+DPD2BINM[(sourmh>>16)&0x3ff]; \
|
| 617 |
|
|
sourhi=DFWORD(df, 0); \
|
| 618 |
|
|
(buf)[3]=DPD2BIN0[((sourhi<<6) | (sourmh>>26))&0x3ff] \
|
| 619 |
|
|
+DPD2BINK[(sourhi>>4)&0x3ff] \
|
| 620 |
|
|
+DPD2BINM[DECCOMBMSD[sourhi>>26]];}
|
| 621 |
|
|
|
| 622 |
|
|
#endif
|
| 623 |
|
|
|
| 624 |
|
|
/* Macros to decode the coefficient in a finite decFloat *df into */
|
| 625 |
|
|
/* a base-thousand uInt array (of size DECLETS+1, to allow for */
|
| 626 |
|
|
/* the MSD), with the least-significant 0-999 'digit' at offset 0.*/
|
| 627 |
|
|
|
| 628 |
|
|
/* Decode the declets. After extracting each one, it is decoded */
|
| 629 |
|
|
/* to binary using a table lookup. */
|
| 630 |
|
|
#if DECPMAX==7
|
| 631 |
|
|
#define GETCOEFFTHOU(df, buf) { \
|
| 632 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 633 |
|
|
(buf)[0]=DPD2BIN[sourhi&0x3ff]; \
|
| 634 |
|
|
(buf)[1]=DPD2BIN[(sourhi>>10)&0x3ff]; \
|
| 635 |
|
|
(buf)[2]=DECCOMBMSD[sourhi>>26];}
|
| 636 |
|
|
|
| 637 |
|
|
#elif DECPMAX==16
|
| 638 |
|
|
#define GETCOEFFTHOU(df, buf) { \
|
| 639 |
|
|
uInt sourhi, sourlo; \
|
| 640 |
|
|
sourlo=DFWORD(df, 1); \
|
| 641 |
|
|
(buf)[0]=DPD2BIN[sourlo&0x3ff]; \
|
| 642 |
|
|
(buf)[1]=DPD2BIN[(sourlo>>10)&0x3ff]; \
|
| 643 |
|
|
(buf)[2]=DPD2BIN[(sourlo>>20)&0x3ff]; \
|
| 644 |
|
|
sourhi=DFWORD(df, 0); \
|
| 645 |
|
|
(buf)[3]=DPD2BIN[((sourhi<<2) | (sourlo>>30))&0x3ff]; \
|
| 646 |
|
|
(buf)[4]=DPD2BIN[(sourhi>>8)&0x3ff]; \
|
| 647 |
|
|
(buf)[5]=DECCOMBMSD[sourhi>>26];}
|
| 648 |
|
|
|
| 649 |
|
|
#elif DECPMAX==34
|
| 650 |
|
|
#define GETCOEFFTHOU(df, buf) { \
|
| 651 |
|
|
uInt sourhi, sourmh, sourml, sourlo; \
|
| 652 |
|
|
sourlo=DFWORD(df, 3); \
|
| 653 |
|
|
(buf)[0]=DPD2BIN[sourlo&0x3ff]; \
|
| 654 |
|
|
(buf)[1]=DPD2BIN[(sourlo>>10)&0x3ff]; \
|
| 655 |
|
|
(buf)[2]=DPD2BIN[(sourlo>>20)&0x3ff]; \
|
| 656 |
|
|
sourml=DFWORD(df, 2); \
|
| 657 |
|
|
(buf)[3]=DPD2BIN[((sourml<<2) | (sourlo>>30))&0x3ff]; \
|
| 658 |
|
|
(buf)[4]=DPD2BIN[(sourml>>8)&0x3ff]; \
|
| 659 |
|
|
(buf)[5]=DPD2BIN[(sourml>>18)&0x3ff]; \
|
| 660 |
|
|
sourmh=DFWORD(df, 1); \
|
| 661 |
|
|
(buf)[6]=DPD2BIN[((sourmh<<4) | (sourml>>28))&0x3ff]; \
|
| 662 |
|
|
(buf)[7]=DPD2BIN[(sourmh>>6)&0x3ff]; \
|
| 663 |
|
|
(buf)[8]=DPD2BIN[(sourmh>>16)&0x3ff]; \
|
| 664 |
|
|
sourhi=DFWORD(df, 0); \
|
| 665 |
|
|
(buf)[9]=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \
|
| 666 |
|
|
(buf)[10]=DPD2BIN[(sourhi>>4)&0x3ff]; \
|
| 667 |
|
|
(buf)[11]=DECCOMBMSD[sourhi>>26];}
|
| 668 |
|
|
#endif
|
| 669 |
|
|
|
| 670 |
|
|
|
| 671 |
|
|
/* Macros to decode the coefficient in a finite decFloat *df and */
|
| 672 |
|
|
/* add to a base-thousand uInt array (as for GETCOEFFTHOU). */
|
| 673 |
|
|
/* After the addition then most significant 'digit' in the array */
|
| 674 |
|
|
/* might have a value larger then 10 (with a maximum of 19). */
|
| 675 |
|
|
#if DECPMAX==7
|
| 676 |
|
|
#define ADDCOEFFTHOU(df, buf) { \
|
| 677 |
|
|
uInt sourhi=DFWORD(df, 0); \
|
| 678 |
|
|
(buf)[0]+=DPD2BIN[sourhi&0x3ff]; \
|
| 679 |
|
|
if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \
|
| 680 |
|
|
(buf)[1]+=DPD2BIN[(sourhi>>10)&0x3ff]; \
|
| 681 |
|
|
if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \
|
| 682 |
|
|
(buf)[2]+=DECCOMBMSD[sourhi>>26];}
|
| 683 |
|
|
|
| 684 |
|
|
#elif DECPMAX==16
|
| 685 |
|
|
#define ADDCOEFFTHOU(df, buf) { \
|
| 686 |
|
|
uInt sourhi, sourlo; \
|
| 687 |
|
|
sourlo=DFWORD(df, 1); \
|
| 688 |
|
|
(buf)[0]+=DPD2BIN[sourlo&0x3ff]; \
|
| 689 |
|
|
if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \
|
| 690 |
|
|
(buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \
|
| 691 |
|
|
if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \
|
| 692 |
|
|
(buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \
|
| 693 |
|
|
if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \
|
| 694 |
|
|
sourhi=DFWORD(df, 0); \
|
| 695 |
|
|
(buf)[3]+=DPD2BIN[((sourhi<<2) | (sourlo>>30))&0x3ff]; \
|
| 696 |
|
|
if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \
|
| 697 |
|
|
(buf)[4]+=DPD2BIN[(sourhi>>8)&0x3ff]; \
|
| 698 |
|
|
if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \
|
| 699 |
|
|
(buf)[5]+=DECCOMBMSD[sourhi>>26];}
|
| 700 |
|
|
|
| 701 |
|
|
#elif DECPMAX==34
|
| 702 |
|
|
#define ADDCOEFFTHOU(df, buf) { \
|
| 703 |
|
|
uInt sourhi, sourmh, sourml, sourlo; \
|
| 704 |
|
|
sourlo=DFWORD(df, 3); \
|
| 705 |
|
|
(buf)[0]+=DPD2BIN[sourlo&0x3ff]; \
|
| 706 |
|
|
if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \
|
| 707 |
|
|
(buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \
|
| 708 |
|
|
if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \
|
| 709 |
|
|
(buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \
|
| 710 |
|
|
if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \
|
| 711 |
|
|
sourml=DFWORD(df, 2); \
|
| 712 |
|
|
(buf)[3]+=DPD2BIN[((sourml<<2) | (sourlo>>30))&0x3ff]; \
|
| 713 |
|
|
if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \
|
| 714 |
|
|
(buf)[4]+=DPD2BIN[(sourml>>8)&0x3ff]; \
|
| 715 |
|
|
if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \
|
| 716 |
|
|
(buf)[5]+=DPD2BIN[(sourml>>18)&0x3ff]; \
|
| 717 |
|
|
if (buf[5]>999) {buf[5]-=1000; buf[6]++;} \
|
| 718 |
|
|
sourmh=DFWORD(df, 1); \
|
| 719 |
|
|
(buf)[6]+=DPD2BIN[((sourmh<<4) | (sourml>>28))&0x3ff]; \
|
| 720 |
|
|
if (buf[6]>999) {buf[6]-=1000; buf[7]++;} \
|
| 721 |
|
|
(buf)[7]+=DPD2BIN[(sourmh>>6)&0x3ff]; \
|
| 722 |
|
|
if (buf[7]>999) {buf[7]-=1000; buf[8]++;} \
|
| 723 |
|
|
(buf)[8]+=DPD2BIN[(sourmh>>16)&0x3ff]; \
|
| 724 |
|
|
if (buf[8]>999) {buf[8]-=1000; buf[9]++;} \
|
| 725 |
|
|
sourhi=DFWORD(df, 0); \
|
| 726 |
|
|
(buf)[9]+=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \
|
| 727 |
|
|
if (buf[9]>999) {buf[9]-=1000; buf[10]++;} \
|
| 728 |
|
|
(buf)[10]+=DPD2BIN[(sourhi>>4)&0x3ff]; \
|
| 729 |
|
|
if (buf[10]>999) {buf[10]-=1000; buf[11]++;} \
|
| 730 |
|
|
(buf)[11]+=DECCOMBMSD[sourhi>>26];}
|
| 731 |
|
|
#endif
|
| 732 |
|
|
|
| 733 |
|
|
|
| 734 |
|
|
/* Set a decFloat to the maximum positive finite number (Nmax) */
|
| 735 |
|
|
#if DECPMAX==7
|
| 736 |
|
|
#define DFSETNMAX(df) \
|
| 737 |
|
|
{DFWORD(df, 0)=0x77f3fcff;}
|
| 738 |
|
|
#elif DECPMAX==16
|
| 739 |
|
|
#define DFSETNMAX(df) \
|
| 740 |
|
|
{DFWORD(df, 0)=0x77fcff3f; \
|
| 741 |
|
|
DFWORD(df, 1)=0xcff3fcff;}
|
| 742 |
|
|
#elif DECPMAX==34
|
| 743 |
|
|
#define DFSETNMAX(df) \
|
| 744 |
|
|
{DFWORD(df, 0)=0x77ffcff3; \
|
| 745 |
|
|
DFWORD(df, 1)=0xfcff3fcf; \
|
| 746 |
|
|
DFWORD(df, 2)=0xf3fcff3f; \
|
| 747 |
|
|
DFWORD(df, 3)=0xcff3fcff;}
|
| 748 |
|
|
#endif
|
| 749 |
|
|
|
| 750 |
|
|
/* [end of format-dependent macros and constants] */
|
| 751 |
|
|
#endif
|
| 752 |
|
|
|
| 753 |
|
|
#else
|
| 754 |
|
|
#error decNumberLocal included more than once
|
| 755 |
|
|
#endif
|
