diff options
Diffstat (limited to 'libdecnumber/decNumberLocal.h')
| -rw-r--r-- | libdecnumber/decNumberLocal.h | 241 |
1 files changed, 79 insertions, 162 deletions
diff --git a/libdecnumber/decNumberLocal.h b/libdecnumber/decNumberLocal.h index c31b50d..f1568f7 100644 --- a/libdecnumber/decNumberLocal.h +++ b/libdecnumber/decNumberLocal.h @@ -31,48 +31,42 @@ /* ------------------------------------------------------------------ */ /* decNumber package local type, tuning, and macro definitions */ /* ------------------------------------------------------------------ */ -/* This header file is included by all modules in the decNumber */ +/* This header file is included by all modules in the decNumber */ /* library, and contains local type definitions, tuning parameters, */ -/* etc. It should not need to be used by application programs. */ +/* etc. It should not need to be used by application programs. */ /* decNumber.h or one of decDouble (etc.) must be included first. */ /* ------------------------------------------------------------------ */ #if !defined(DECNUMBERLOC) #define DECNUMBERLOC - #define DECVERSION "decNumber 3.61" /* Package Version [16 max.] */ + #define DECVERSION "decNumber 3.53" /* Package Version [16 max.] */ #define DECNLAUTHOR "Mike Cowlishaw" /* Who to blame */ #include <stdlib.h> /* for abs */ #include <string.h> /* for memset, strcpy */ + #include "dconfig.h" /* for WORDS_BIGENDIAN */ /* Conditional code flag -- set this to match hardware platform */ - #if !defined(DECLITEND) - #define DECLITEND 1 /* 1=little-endian, 0=big-endian */ + /* 1=little-endian, 0=big-endian */ + #if WORDS_BIGENDIAN + #define DECLITEND 0 + #else + #define DECLITEND 1 #endif /* Conditional code flag -- set this to 1 for best performance */ - #if !defined(DECUSE64) #define DECUSE64 1 /* 1=use int64s, 0=int32 & smaller only */ - #endif /* Conditional check flags -- set these to 0 for best performance */ - #if !defined(DECCHECK) #define DECCHECK 0 /* 1 to enable robust checking */ - #endif - #if !defined(DECALLOC) #define DECALLOC 0 /* 1 to enable memory accounting */ - #endif - #if !defined(DECTRACE) #define DECTRACE 0 /* 1 to trace certain internals, etc. */ - #endif /* Tuning parameter for decNumber (arbitrary precision) module */ - #if !defined(DECBUFFER) #define DECBUFFER 36 /* Size basis for local buffers. This */ /* should be a common maximum precision */ /* rounded up to a multiple of 4; must */ /* be zero or positive. */ - #endif /* ---------------------------------------------------------------- */ /* Definitions for all modules (general-purpose) */ @@ -82,33 +76,33 @@ /* not use int or long directly. */ #define Flag uint8_t #define Byte int8_t - #define uByte uint8_t - #define Short int16_t + #define uByte uint8_t + #define Short int16_t #define uShort uint16_t #define Int int32_t #define uInt uint32_t #define Unit decNumberUnit #if DECUSE64 #define Long int64_t - #define uLong uint64_t + #define uLong uint64_t #endif /* Development-use definitions */ typedef long int LI; /* for printf arguments only */ #define DECNOINT 0 /* 1 to check no internal use of 'int' */ - /* or stdint types */ #if DECNOINT /* if these interfere with your C includes, do not set DECNOINT */ - #define int ? /* enable to ensure that plain C 'int' */ - #define long ?? /* .. or 'long' types are not used */ + #define int ? /* enable to ensure that plain C 'int' */ + #define long ?? /* .. or 'long' types are not used */ #endif /* Shared lookup tables */ extern const uByte DECSTICKYTAB[10]; /* re-round digits if sticky */ extern const uInt DECPOWERS[10]; /* powers of ten table */ /* The following are included from decDPD.h */ - extern const uShort DPD2BIN[1024]; /* DPD -> 0-999 */ - extern const uShort BIN2DPD[1000]; /* 0-999 -> DPD */ +#include "decDPDSymbols.h" + extern const uShort DPD2BIN[1024]; /* DPD -> 0-999 */ + extern const uShort BIN2DPD[1000]; /* 0-999 -> DPD */ extern const uInt DPD2BINK[1024]; /* DPD -> 0-999000 */ extern const uInt DPD2BINM[1024]; /* DPD -> 0-999000000 */ extern const uByte DPD2BCD8[4096]; /* DPD -> ddd + len */ @@ -117,42 +111,32 @@ /* LONGMUL32HI -- set w=(u*v)>>32, where w, u, and v are uInts */ /* (that is, sets w to be the high-order word of the 64-bit result; */ - /* the low-order word is simply u*v.) */ + /* the low-order word is simply u*v.) */ /* This version is derived from Knuth via Hacker's Delight; */ - /* it seems to optimize better than some others tried */ + /* it seems to optimize better than some others tried */ #define LONGMUL32HI(w, u, v) { \ - uInt u0, u1, v0, v1, w0, w1, w2, t; \ + uInt u0, u1, v0, v1, w0, w1, w2, t; \ u0=u & 0xffff; u1=u>>16; \ v0=v & 0xffff; v1=v>>16; \ w0=u0*v0; \ - t=u1*v0 + (w0>>16); \ + t=u1*v0 + (w0>>16); \ w1=t & 0xffff; w2=t>>16; \ w1=u0*v1 + w1; \ (w)=u1*v1 + w2 + (w1>>16);} /* ROUNDUP -- round an integer up to a multiple of n */ #define ROUNDUP(i, n) ((((i)+(n)-1)/n)*n) - #define ROUNDUP4(i) (((i)+3)&~3) /* special for n=4 */ /* ROUNDDOWN -- round an integer down to a multiple of n */ #define ROUNDDOWN(i, n) (((i)/n)*n) - #define ROUNDDOWN4(i) ((i)&~3) /* special for n=4 */ - - /* References to multi-byte sequences under different sizes; these */ - /* require locally declared variables, but do not violate strict */ - /* aliasing or alignment (as did the UINTAT simple cast to uInt). */ - /* Variables needed are uswork, uiwork, etc. [so do not use at same */ - /* level in an expression, e.g., UBTOUI(x)==UBTOUI(y) may fail]. */ + #define ROUNDDOWN4(i) ((i)&~3) /* special for n=4 */ - /* Return a uInt, etc., from bytes starting at a char* or uByte* */ - #define UBTOUS(b) (memcpy((void *)&uswork, b, 2), uswork) - #define UBTOUI(b) (memcpy((void *)&uiwork, b, 4), uiwork) - - /* Store a uInt, etc., into bytes starting at a char* or uByte*. */ - /* Returns i, evaluated, for convenience; has to use uiwork because */ - /* i may be an expression. */ - #define UBFROMUS(b, i) (uswork=(i), memcpy(b, (void *)&uswork, 2), uswork) - #define UBFROMUI(b, i) (uiwork=(i), memcpy(b, (void *)&uiwork, 4), uiwork) + /* References to multi-byte sequences under different sizes */ + /* Refer to a uInt from four bytes starting at a char* or uByte*, */ + /* etc. */ + #define UINTAT(b) (*((uInt *)(b))) + #define USHORTAT(b) (*((uShort *)(b))) + #define UBYTEAT(b) (*((uByte *)(b))) /* X10 and X100 -- multiply integer i by 10 or 100 */ /* [shifts are usually faster than multiply; could be conditional] */ @@ -165,7 +149,7 @@ /* Useful constants */ #define BILLION 1000000000 /* 10**9 */ - /* CHARMASK: 0x30303030 for ASCII/UTF8; 0xF0F0F0F0 for EBCDIC */ + /* CHARMASK: 0x30303030 for ASCII/UTF8; 0xF0F0F0F0 for EBCDIC */ #define CHARMASK ((((((((uInt)'0')<<8)+'0')<<8)+'0')<<8)+'0') @@ -188,7 +172,7 @@ #error Minimum exponent mismatch #endif - /* Set DECDPUNMAX -- the maximum integer that fits in DECDPUN */ + /* Set DECDPUNMAX -- the maximum integer that fits in DECDPUN */ /* digits, and D2UTABLE -- the initializer for the D2U table */ #if DECDPUN==1 #define DECDPUNMAX 9 @@ -269,7 +253,7 @@ /* D2N -- return the number of decNumber structs that would be */ /* needed to contain that number of digits (and the initial */ /* decNumber struct) safely. Note that one Unit is included in the */ - /* initial structure. Used for allocating space that is aligned on */ + /* initial structure. Used for allocating space that is aligned on */ /* a decNumber struct boundary. */ #define D2N(d) \ ((((SD2U(d)-1)*sizeof(Unit))+sizeof(decNumber)*2-1)/sizeof(decNumber)) @@ -277,7 +261,7 @@ /* TODIGIT -- macro to remove the leading digit from the unsigned */ /* integer u at column cut (counting from the right, LSD=0) and */ /* place it as an ASCII character into the character pointed to by */ - /* c. Note that cut must be <= 9, and the maximum value for u is */ + /* c. Note that cut must be <= 9, and the maximum value for u is */ /* 2,000,000,000 (as is needed for negative exponents of */ /* subnormals). The unsigned integer pow is used as a temporary */ /* variable. */ @@ -290,7 +274,7 @@ pow/=2; \ if ((u)>=pow) {(u)-=pow; *(c)+=4;} \ pow/=2; \ - } \ + } \ if ((u)>=pow) {(u)-=pow; *(c)+=2;} \ pow/=2; \ if ((u)>=pow) {(u)-=pow; *(c)+=1;} \ @@ -305,9 +289,9 @@ /* number, whose coefficient is a string of bcd8 uBytes */ typedef struct { uByte *msd; /* -> most significant digit */ - uByte *lsd; /* -> least ditto */ + uByte *lsd; /* -> least ditto */ uInt sign; /* 0=positive, DECFLOAT_Sign=negative */ - Int exponent; /* Unadjusted signed exponent (q), or */ + Int exponent; /* Unadjusted signed exponent (q), or */ /* DECFLOAT_NaN etc. for a special */ } bcdnum; @@ -324,12 +308,12 @@ #define DECWORDS (DECBYTES/4) #define DECWWORDS (DECWBYTES/4) #if DECLITEND - #define DFBYTE(df, off) ((df)->bytes[DECBYTES-1-(off)]) - #define DFWORD(df, off) ((df)->words[DECWORDS-1-(off)]) + #define DFWORD(df, off) ((df)->words[DECWORDS-1-(off)]) + #define DFBYTE(df, off) ((df)->bytes[DECBYTES-1-(off)]) #define DFWWORD(dfw, off) ((dfw)->words[DECWWORDS-1-(off)]) #else - #define DFBYTE(df, off) ((df)->bytes[off]) - #define DFWORD(df, off) ((df)->words[off]) + #define DFWORD(df, off) ((df)->words[off]) + #define DFBYTE(df, off) ((df)->bytes[off]) #define DFWWORD(dfw, off) ((dfw)->words[off]) #endif @@ -342,6 +326,7 @@ #define DFISSNAN(df) ((DFWORD(df, 0)&0x7e000000)==0x7e000000) /* Shared lookup tables */ +#include "decCommonSymbols.h" extern const uInt DECCOMBMSD[64]; /* Combination field -> MSD */ extern const uInt DECCOMBFROM[48]; /* exp+msd -> Combination */ @@ -353,7 +338,7 @@ /* Format-dependent macros and constants */ #if defined(DECPMAX) - /* Useful constants */ + /* Useful constants */ #define DECPMAX9 (ROUNDUP(DECPMAX, 9)/9) /* 'Pmax' in 10**9s */ /* Top words for a zero */ #define SINGLEZERO 0x22500000 @@ -365,10 +350,10 @@ /* DFISZERO -- test for (any) zero */ /* DFISCCZERO -- test for coefficient continuation being zero */ /* DFISCC01 -- test for coefficient contains only 0s and 1s */ - /* DFISINT -- test for finite and exponent q=0 */ + /* DFISINT -- test for finite and exponent q=0 */ /* DFISUINT01 -- test for sign=0, finite, exponent q=0, and */ /* MSD=0 or 1 */ - /* ZEROWORD is also defined here. */ + /* ZEROWORD is also defined here. */ /* In DFISZERO the first test checks the least-significant word */ /* (most likely to be non-zero); the penultimate tests MSD and */ /* DPDs in the signword, and the final test excludes specials and */ @@ -422,36 +407,26 @@ || ((dpd)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k))) /* declet is at offset k (a multiple of 2) in a pair of uInts: */ /* [the top 2 bits will always be in the more-significant uInt] */ - #define CANONDPDTWO(hi, lo, k) (((hi)&(0x300>>(32-(k))))==0 \ + #define CANONDPDTWO(hi, lo, k) (((hi)&(0x300>>(32-(k))))==0 \ || ((hi)&(0x6e>>(32-(k))))!=(0x6e>>(32-(k))) \ || ((lo)&(((uInt)0x6e)<<(k)))!=(((uInt)0x6e)<<(k))) /* Macro to test whether a full-length (length DECPMAX) BCD8 */ - /* coefficient, starting at uByte u, is all zeros */ - /* Test just the LSWord first, then the remainder as a sequence */ - /* of tests in order to avoid same-level use of UBTOUI */ + /* coefficient is zero */ + /* test just the LSWord first, then the remainder */ #if DECPMAX==7 - #define ISCOEFFZERO(u) ( \ - UBTOUI((u)+DECPMAX-4)==0 \ - && UBTOUS((u)+DECPMAX-6)==0 \ - && *(u)==0) + #define ISCOEFFZERO(u) (UINTAT((u)+DECPMAX-4)==0 \ + && UINTAT((u)+DECPMAX-7)==0) #elif DECPMAX==16 - #define ISCOEFFZERO(u) ( \ - UBTOUI((u)+DECPMAX-4)==0 \ - && UBTOUI((u)+DECPMAX-8)==0 \ - && UBTOUI((u)+DECPMAX-12)==0 \ - && UBTOUI(u)==0) + #define ISCOEFFZERO(u) (UINTAT((u)+DECPMAX-4)==0 \ + && (UINTAT((u)+DECPMAX-8)+UINTAT((u)+DECPMAX-12) \ + +UINTAT((u)+DECPMAX-16))==0) #elif DECPMAX==34 - #define ISCOEFFZERO(u) ( \ - UBTOUI((u)+DECPMAX-4)==0 \ - && UBTOUI((u)+DECPMAX-8)==0 \ - && UBTOUI((u)+DECPMAX-12)==0 \ - && UBTOUI((u)+DECPMAX-16)==0 \ - && UBTOUI((u)+DECPMAX-20)==0 \ - && UBTOUI((u)+DECPMAX-24)==0 \ - && UBTOUI((u)+DECPMAX-28)==0 \ - && UBTOUI((u)+DECPMAX-32)==0 \ - && UBTOUS(u)==0) + #define ISCOEFFZERO(u) (UINTAT((u)+DECPMAX-4)==0 \ + && (UINTAT((u)+DECPMAX-8) +UINTAT((u)+DECPMAX-12) \ + +UINTAT((u)+DECPMAX-16)+UINTAT((u)+DECPMAX-20) \ + +UINTAT((u)+DECPMAX-24)+UINTAT((u)+DECPMAX-28) \ + +UINTAT((u)+DECPMAX-32)+USHORTAT((u)+DECPMAX-34))==0) #endif /* Macros and masks for the exponent continuation field and MSD */ @@ -473,24 +448,29 @@ #define ECONNANMASK ((0x01ffffff>>(32-6-DECECONL))<<(32-6-DECECONL)) /* Macros to decode the coefficient in a finite decFloat *df into */ - /* a BCD string (uByte *bcdin) of length DECPMAX uBytes. */ + /* a BCD string (uByte *bcdin) of length DECPMAX uBytes */ + + /* In-line sequence to convert 10 bits at right end of uInt dpd */ + /* to three BCD8 digits starting at uByte u. Note that an extra */ + /* byte is written to the right of the three digits because this */ + /* moves four at a time for speed; the alternative macro moves */ + /* exactly three bytes */ + #define dpd2bcd8(u, dpd) { \ + UINTAT(u)=UINTAT(&DPD2BCD8[((dpd)&0x3ff)*4]);} - /* In-line sequence to convert least significant 10 bits of uInt */ - /* dpd to three BCD8 digits starting at uByte u. Note that an */ - /* extra byte is written to the right of the three digits because */ - /* four bytes are moved at a time for speed; the alternative */ - /* macro moves exactly three bytes (usually slower). */ - #define dpd2bcd8(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 4) - #define dpd2bcd83(u, dpd) memcpy(u, &DPD2BCD8[((dpd)&0x3ff)*4], 3) + #define dpd2bcd83(u, dpd) { \ + *(u)=DPD2BCD8[((dpd)&0x3ff)*4]; \ + *(u+1)=DPD2BCD8[((dpd)&0x3ff)*4+1]; \ + *(u+2)=DPD2BCD8[((dpd)&0x3ff)*4+2];} /* Decode the declets. After extracting each one, it is decoded */ /* to BCD8 using a table lookup (also used for variable-length */ - /* decode). Each DPD decode is 3 bytes BCD8 plus a one-byte */ - /* length which is not used, here). Fixed-length 4-byte moves */ + /* decode). Each DPD decode is 3 bytes BCD8 plus a one-byte */ + /* length which is not used, here). Fixed-length 4-byte moves */ /* are fast, however, almost everywhere, and so are used except */ /* for the final three bytes (to avoid overrun). The code below */ /* is 36 instructions for Doubles and about 70 for Quads, even */ - /* on IA32. */ + /* on IA32. */ /* Two macros are defined for each format: */ /* GETCOEFF extracts the coefficient of the current format */ @@ -498,7 +478,7 @@ /* The latter is a copy of the next-wider GETCOEFF using DFWWORD. */ #if DECPMAX==7 - #define GETCOEFF(df, bcd) { \ + #define GETCOEFF(df, bcd) { \ uInt sourhi=DFWORD(df, 0); \ *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ dpd2bcd8(bcd+1, sourhi>>10); \ @@ -514,7 +494,7 @@ dpd2bcd83(bcd+13, sourlo);} #elif DECPMAX==16 - #define GETCOEFF(df, bcd) { \ + #define GETCOEFF(df, bcd) { \ uInt sourhi=DFWORD(df, 0); \ uInt sourlo=DFWORD(df, 1); \ *(bcd)=(uByte)DECCOMBMSD[sourhi>>26]; \ @@ -542,7 +522,7 @@ dpd2bcd83(bcd+31, sourlo);} #elif DECPMAX==34 - #define GETCOEFF(df, bcd) { \ + #define GETCOEFF(df, bcd) { \ uInt sourhi=DFWORD(df, 0); \ uInt sourmh=DFWORD(df, 1); \ uInt sourml=DFWORD(df, 2); \ @@ -560,12 +540,12 @@ dpd2bcd8(bcd+28, sourlo>>10); \ dpd2bcd83(bcd+31, sourlo);} - #define GETWCOEFF(df, bcd) {??} /* [should never be used] */ + #define GETWCOEFF(df, bcd) {??} /* [should never be used] */ #endif /* Macros to decode the coefficient in a finite decFloat *df into */ /* a base-billion uInt array, with the least-significant */ - /* 0-999999999 'digit' at offset 0. */ + /* 0-999999999 'digit' at offset 0. */ /* Decode the declets. After extracting each one, it is decoded */ /* to binary using a table lookup. Three tables are used; one */ @@ -617,8 +597,8 @@ #endif /* Macros to decode the coefficient in a finite decFloat *df into */ - /* a base-thousand uInt array (of size DECLETS+1, to allow for */ - /* the MSD), with the least-significant 0-999 'digit' at offset 0.*/ + /* a base-thousand uInt array, with the least-significant 0-999 */ + /* 'digit' at offset 0. */ /* Decode the declets. After extracting each one, it is decoded */ /* to binary using a table lookup. */ @@ -660,72 +640,9 @@ (buf)[9]=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \ (buf)[10]=DPD2BIN[(sourhi>>4)&0x3ff]; \ (buf)[11]=DECCOMBMSD[sourhi>>26];} - #endif - - - /* Macros to decode the coefficient in a finite decFloat *df and */ - /* add to a base-thousand uInt array (as for GETCOEFFTHOU). */ - /* After the addition then most significant 'digit' in the array */ - /* might have a value larger then 10 (with a maximum of 19). */ - #if DECPMAX==7 - #define ADDCOEFFTHOU(df, buf) { \ - uInt sourhi=DFWORD(df, 0); \ - (buf)[0]+=DPD2BIN[sourhi&0x3ff]; \ - if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ - (buf)[1]+=DPD2BIN[(sourhi>>10)&0x3ff]; \ - if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ - (buf)[2]+=DECCOMBMSD[sourhi>>26];} - #elif DECPMAX==16 - #define ADDCOEFFTHOU(df, buf) { \ - uInt sourhi, sourlo; \ - sourlo=DFWORD(df, 1); \ - (buf)[0]+=DPD2BIN[sourlo&0x3ff]; \ - if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ - (buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \ - if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ - (buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \ - if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \ - sourhi=DFWORD(df, 0); \ - (buf)[3]+=DPD2BIN[((sourhi<<2) | (sourlo>>30))&0x3ff]; \ - if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \ - (buf)[4]+=DPD2BIN[(sourhi>>8)&0x3ff]; \ - if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \ - (buf)[5]+=DECCOMBMSD[sourhi>>26];} - - #elif DECPMAX==34 - #define ADDCOEFFTHOU(df, buf) { \ - uInt sourhi, sourmh, sourml, sourlo; \ - sourlo=DFWORD(df, 3); \ - (buf)[0]+=DPD2BIN[sourlo&0x3ff]; \ - if (buf[0]>999) {buf[0]-=1000; buf[1]++;} \ - (buf)[1]+=DPD2BIN[(sourlo>>10)&0x3ff]; \ - if (buf[1]>999) {buf[1]-=1000; buf[2]++;} \ - (buf)[2]+=DPD2BIN[(sourlo>>20)&0x3ff]; \ - if (buf[2]>999) {buf[2]-=1000; buf[3]++;} \ - sourml=DFWORD(df, 2); \ - (buf)[3]+=DPD2BIN[((sourml<<2) | (sourlo>>30))&0x3ff]; \ - if (buf[3]>999) {buf[3]-=1000; buf[4]++;} \ - (buf)[4]+=DPD2BIN[(sourml>>8)&0x3ff]; \ - if (buf[4]>999) {buf[4]-=1000; buf[5]++;} \ - (buf)[5]+=DPD2BIN[(sourml>>18)&0x3ff]; \ - if (buf[5]>999) {buf[5]-=1000; buf[6]++;} \ - sourmh=DFWORD(df, 1); \ - (buf)[6]+=DPD2BIN[((sourmh<<4) | (sourml>>28))&0x3ff]; \ - if (buf[6]>999) {buf[6]-=1000; buf[7]++;} \ - (buf)[7]+=DPD2BIN[(sourmh>>6)&0x3ff]; \ - if (buf[7]>999) {buf[7]-=1000; buf[8]++;} \ - (buf)[8]+=DPD2BIN[(sourmh>>16)&0x3ff]; \ - if (buf[8]>999) {buf[8]-=1000; buf[9]++;} \ - sourhi=DFWORD(df, 0); \ - (buf)[9]+=DPD2BIN[((sourhi<<6) | (sourmh>>26))&0x3ff]; \ - if (buf[9]>999) {buf[9]-=1000; buf[10]++;} \ - (buf)[10]+=DPD2BIN[(sourhi>>4)&0x3ff]; \ - if (buf[10]>999) {buf[10]-=1000; buf[11]++;} \ - (buf)[11]+=DECCOMBMSD[sourhi>>26];} #endif - /* Set a decFloat to the maximum positive finite number (Nmax) */ #if DECPMAX==7 #define DFSETNMAX(df) \ |