Import the latest gdtoa sources from the vendor, dated 2008-08-31.
This commit is contained in:
David Schultz
parent
1a971c8df0
commit
e12da90037
10
README
10
README
@ -332,5 +332,15 @@ Compiling g__fmt.c, strtod.c, and strtodg.c with -DUSE_LOCALE causes
|
||||
the decimal-point character to be taken from the current locale; otherwise
|
||||
it is '.'.
|
||||
|
||||
Source files dtoa.c and strtod.c in this directory are derived from
|
||||
netlib's "dtoa.c from fp" and are meant to function equivalently.
|
||||
When compiled with Honor_FLT_ROUNDS #defined (on systems that provide
|
||||
FLT_ROUNDS and fegetround() as specified in the C99 standard), they
|
||||
honor the current rounding mode. Because FLT_ROUNDS is buggy on some
|
||||
(Linux) systems -- not reflecting calls on fesetround(), as the C99
|
||||
standard says it should -- when Honor_FLT_ROUNDS is #defined, the
|
||||
current rounding mode is obtained from fegetround() rather than from
|
||||
FLT_ROUNDS, unless Trust_FLT_ROUNDS is also #defined.
|
||||
|
||||
Please send comments to David M. Gay (dmg at acm dot org, with " at "
|
||||
changed at "@" and " dot " changed to ".").
|
||||
|
||||
39
dtoa.c
39
dtoa.c
@ -66,7 +66,6 @@ THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
#define Rounding rounding
|
||||
#undef Check_FLT_ROUNDS
|
||||
#define Check_FLT_ROUNDS
|
||||
#else
|
||||
@ -127,12 +126,22 @@ dtoa
|
||||
Bigint *b, *b1, *delta, *mlo, *mhi, *S;
|
||||
double d2, ds, eps;
|
||||
char *s, *s0;
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
int rounding;
|
||||
#endif
|
||||
#ifdef SET_INEXACT
|
||||
int inexact, oldinexact;
|
||||
#endif
|
||||
#ifdef Honor_FLT_ROUNDS /*{*/
|
||||
int Rounding;
|
||||
#ifdef Trust_FLT_ROUNDS /*{{ only define this if FLT_ROUNDS really works! */
|
||||
Rounding = Flt_Rounds;
|
||||
#else /*}{*/
|
||||
Rounding = 1;
|
||||
switch(fegetround()) {
|
||||
case FE_TOWARDZERO: Rounding = 0; break;
|
||||
case FE_UPWARD: Rounding = 2; break;
|
||||
case FE_DOWNWARD: Rounding = 3;
|
||||
}
|
||||
#endif /*}}*/
|
||||
#endif /*}*/
|
||||
|
||||
#ifndef MULTIPLE_THREADS
|
||||
if (dtoa_result) {
|
||||
@ -178,12 +187,12 @@ dtoa
|
||||
inexact = 1;
|
||||
#endif
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if ((rounding = Flt_Rounds) >= 2) {
|
||||
if (Rounding >= 2) {
|
||||
if (*sign)
|
||||
rounding = rounding == 2 ? 0 : 2;
|
||||
Rounding = Rounding == 2 ? 0 : 2;
|
||||
else
|
||||
if (rounding != 2)
|
||||
rounding = 0;
|
||||
if (Rounding != 2)
|
||||
Rounding = 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
@ -316,7 +325,7 @@ dtoa
|
||||
s = s0 = rv_alloc(i);
|
||||
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (mode > 1 && rounding != 1)
|
||||
if (mode > 1 && Rounding != 1)
|
||||
leftright = 0;
|
||||
#endif
|
||||
|
||||
@ -453,7 +462,7 @@ dtoa
|
||||
if (i == ilim) {
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (mode > 1)
|
||||
switch(rounding) {
|
||||
switch(Rounding) {
|
||||
case 0: goto ret1;
|
||||
case 2: goto bump_up;
|
||||
}
|
||||
@ -521,7 +530,7 @@ dtoa
|
||||
spec_case = 0;
|
||||
if ((mode < 2 || leftright)
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
&& rounding == 1
|
||||
&& Rounding == 1
|
||||
#endif
|
||||
) {
|
||||
if (!word1(d) && !(word0(d) & Bndry_mask)
|
||||
@ -614,7 +623,7 @@ dtoa
|
||||
#ifndef ROUND_BIASED
|
||||
if (j1 == 0 && mode != 1 && !(word1(d) & 1)
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
&& rounding >= 1
|
||||
&& Rounding >= 1
|
||||
#endif
|
||||
) {
|
||||
if (dig == '9')
|
||||
@ -642,7 +651,7 @@ dtoa
|
||||
}
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (mode > 1)
|
||||
switch(rounding) {
|
||||
switch(Rounding) {
|
||||
case 0: goto accept_dig;
|
||||
case 2: goto keep_dig;
|
||||
}
|
||||
@ -660,7 +669,7 @@ dtoa
|
||||
}
|
||||
if (j1 > 0) {
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (!rounding)
|
||||
if (!Rounding)
|
||||
goto accept_dig;
|
||||
#endif
|
||||
if (dig == '9') { /* possible if i == 1 */
|
||||
@ -703,7 +712,7 @@ dtoa
|
||||
/* Round off last digit */
|
||||
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
switch(rounding) {
|
||||
switch(Rounding) {
|
||||
case 0: goto trimzeros;
|
||||
case 2: goto roundoff;
|
||||
}
|
||||
|
||||
6
gdtoa.h
6
gdtoa.h
@ -74,9 +74,9 @@ typedef unsigned short UShort;
|
||||
|
||||
/* The following may be or-ed into one of the above values. */
|
||||
|
||||
STRTOG_Neg = 0x08,
|
||||
STRTOG_Inexlo = 0x10,
|
||||
STRTOG_Inexhi = 0x20,
|
||||
STRTOG_Neg = 0x08, /* does not affect STRTOG_Inexlo or STRTOG_Inexhi */
|
||||
STRTOG_Inexlo = 0x10, /* returned result rounded toward zero */
|
||||
STRTOG_Inexhi = 0x20, /* returned result rounded away from zero */
|
||||
STRTOG_Inexact = 0x30,
|
||||
STRTOG_Underflow= 0x40,
|
||||
STRTOG_Overflow = 0x80
|
||||
|
||||
21
gdtoaimp.h
21
gdtoaimp.h
@ -130,13 +130,16 @@ THIS SOFTWARE.
|
||||
* Infinity and NaN (case insensitively).
|
||||
* When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
|
||||
* strtodg also accepts (case insensitively) strings of the form
|
||||
* NaN(x), where x is a string of hexadecimal digits and spaces;
|
||||
* if there is only one string of hexadecimal digits, it is taken
|
||||
* for the fraction bits of the resulting NaN; if there are two or
|
||||
* more strings of hexadecimal digits, each string is assigned
|
||||
* to the next available sequence of 32-bit words of fractions
|
||||
* bits (starting with the most significant), right-aligned in
|
||||
* each sequence.
|
||||
* NaN(x), where x is a string of hexadecimal digits (optionally
|
||||
* preceded by 0x or 0X) and spaces; if there is only one string
|
||||
* of hexadecimal digits, it is taken for the fraction bits of the
|
||||
* resulting NaN; if there are two or more strings of hexadecimal
|
||||
* digits, each string is assigned to the next available sequence
|
||||
* of 32-bit words of fractions bits (starting with the most
|
||||
* significant), right-aligned in each sequence.
|
||||
* Unless GDTOA_NON_PEDANTIC_NANCHECK is #defined, input "NaN(...)"
|
||||
* is consumed even when ... has the wrong form (in which case the
|
||||
* "(...)" is consumed but ignored).
|
||||
* #define MULTIPLE_THREADS if the system offers preemptively scheduled
|
||||
* multiple threads. In this case, you must provide (or suitably
|
||||
* #define) two locks, acquired by ACQUIRE_DTOA_LOCK(n) and freed
|
||||
@ -148,7 +151,7 @@ THIS SOFTWARE.
|
||||
* dtoa. You may do so whether or not MULTIPLE_THREADS is #defined.
|
||||
* #define IMPRECISE_INEXACT if you do not care about the setting of
|
||||
* the STRTOG_Inexact bits in the special case of doing IEEE double
|
||||
* precision conversions (which could also be done by the strtog in
|
||||
* precision conversions (which could also be done by the strtod in
|
||||
* dtoa.c).
|
||||
* #define NO_HEX_FP to disable recognition of C9x's hexadecimal
|
||||
* floating-point constants.
|
||||
@ -538,7 +541,7 @@ extern void memcpy_D2A ANSI((void*, const void*, size_t));
|
||||
extern int cmp ANSI((Bigint*, Bigint*));
|
||||
extern void copybits ANSI((ULong*, int, Bigint*));
|
||||
extern Bigint *d2b ANSI((double, int*, int*));
|
||||
extern int decrement ANSI((Bigint*));
|
||||
extern void decrement ANSI((Bigint*));
|
||||
extern Bigint *diff ANSI((Bigint*, Bigint*));
|
||||
extern char *dtoa ANSI((double d, int mode, int ndigits,
|
||||
int *decpt, int *sign, char **rve));
|
||||
|
||||
78
gethex.c
78
gethex.c
@ -45,7 +45,7 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
{
|
||||
Bigint *b;
|
||||
CONST unsigned char *decpt, *s0, *s, *s1;
|
||||
int esign, havedig, irv, k, n, nbits, up, zret;
|
||||
int big, esign, havedig, irv, j, k, n, n0, nbits, up, zret;
|
||||
ULong L, lostbits, *x;
|
||||
Long e, e1;
|
||||
#ifdef USE_LOCALE
|
||||
@ -56,6 +56,7 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
|
||||
if (!hexdig['0'])
|
||||
hexdig_init_D2A();
|
||||
*bp = 0;
|
||||
havedig = 0;
|
||||
s0 = *(CONST unsigned char **)sp + 2;
|
||||
while(s0[havedig] == '0')
|
||||
@ -90,10 +91,10 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
e = -(((Long)(s-decpt)) << 2);
|
||||
pcheck:
|
||||
s1 = s;
|
||||
big = esign = 0;
|
||||
switch(*s) {
|
||||
case 'p':
|
||||
case 'P':
|
||||
esign = 0;
|
||||
switch(*++s) {
|
||||
case '-':
|
||||
esign = 1;
|
||||
@ -106,15 +107,66 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
break;
|
||||
}
|
||||
e1 = n - 0x10;
|
||||
while((n = hexdig[*++s]) !=0 && n <= 0x19)
|
||||
while((n = hexdig[*++s]) !=0 && n <= 0x19) {
|
||||
if (e1 & 0xf8000000)
|
||||
big = 1;
|
||||
e1 = 10*e1 + n - 0x10;
|
||||
}
|
||||
if (esign)
|
||||
e1 = -e1;
|
||||
e += e1;
|
||||
}
|
||||
*sp = (char*)s;
|
||||
if (!havedig)
|
||||
*sp = s0 - 1;
|
||||
if (zret)
|
||||
return havedig ? STRTOG_Zero : STRTOG_NoNumber;
|
||||
return STRTOG_Zero;
|
||||
if (big) {
|
||||
if (esign) {
|
||||
switch(fpi->rounding) {
|
||||
case FPI_Round_up:
|
||||
if (sign)
|
||||
break;
|
||||
goto ret_tiny;
|
||||
case FPI_Round_down:
|
||||
if (!sign)
|
||||
break;
|
||||
goto ret_tiny;
|
||||
}
|
||||
goto retz;
|
||||
ret_tiny:
|
||||
b = Balloc(0);
|
||||
b->wds = 1;
|
||||
b->x[0] = 1;
|
||||
goto dret;
|
||||
}
|
||||
switch(fpi->rounding) {
|
||||
case FPI_Round_near:
|
||||
goto ovfl1;
|
||||
case FPI_Round_up:
|
||||
if (!sign)
|
||||
goto ovfl1;
|
||||
goto ret_big;
|
||||
case FPI_Round_down:
|
||||
if (sign)
|
||||
goto ovfl1;
|
||||
goto ret_big;
|
||||
}
|
||||
ret_big:
|
||||
nbits = fpi->nbits;
|
||||
n0 = n = nbits >> kshift;
|
||||
if (nbits & kmask)
|
||||
++n;
|
||||
for(j = n, k = 0; j >>= 1; ++k);
|
||||
*bp = b = Balloc(k);
|
||||
b->wds = n;
|
||||
for(j = 0; j < n0; ++j)
|
||||
b->x[j] = ALL_ON;
|
||||
if (n > n0)
|
||||
b->x[j] = ULbits >> (ULbits - (nbits & kmask));
|
||||
*exp = fpi->emin;
|
||||
return STRTOG_Normal | STRTOG_Inexlo;
|
||||
}
|
||||
n = s1 - s0 - 1;
|
||||
for(k = 0; n > 7; n >>= 1)
|
||||
k++;
|
||||
@ -146,7 +198,7 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
k = n - 1;
|
||||
if (x[k>>kshift] & 1 << (k & kmask)) {
|
||||
lostbits = 2;
|
||||
if (k > 1 && any_on(b,k-1))
|
||||
if (k > 0 && any_on(b,k))
|
||||
lostbits = 3;
|
||||
}
|
||||
}
|
||||
@ -162,7 +214,10 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
if (e > fpi->emax) {
|
||||
ovfl:
|
||||
Bfree(b);
|
||||
*bp = 0;
|
||||
ovfl1:
|
||||
#ifndef NO_ERRNO
|
||||
errno = ERANGE;
|
||||
#endif
|
||||
return STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
|
||||
}
|
||||
irv = STRTOG_Normal;
|
||||
@ -182,15 +237,22 @@ gethex( CONST char **sp, FPI *fpi, Long *exp, Bigint **bp, int sign)
|
||||
case FPI_Round_down:
|
||||
if (sign) {
|
||||
one_bit:
|
||||
*exp = fpi->emin;
|
||||
x[0] = b->wds = 1;
|
||||
dret:
|
||||
*bp = b;
|
||||
*exp = fpi->emin;
|
||||
#ifndef NO_ERRNO
|
||||
errno = ERANGE;
|
||||
#endif
|
||||
return STRTOG_Denormal | STRTOG_Inexhi
|
||||
| STRTOG_Underflow;
|
||||
}
|
||||
}
|
||||
Bfree(b);
|
||||
*bp = 0;
|
||||
retz:
|
||||
#ifndef NO_ERRNO
|
||||
errno = ERANGE;
|
||||
#endif
|
||||
return STRTOG_Zero | STRTOG_Inexlo | STRTOG_Underflow;
|
||||
}
|
||||
k = n - 1;
|
||||
|
||||
19
hexnan.c
19
hexnan.c
@ -71,6 +71,12 @@ hexnan( CONST char **sp, FPI *fpi, ULong *x0)
|
||||
x1 = xe = x;
|
||||
havedig = hd0 = i = 0;
|
||||
s = *sp;
|
||||
/* allow optional initial 0x or 0X */
|
||||
while((c = *(CONST unsigned char*)(s+1)) && c <= ' ')
|
||||
++s;
|
||||
if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')
|
||||
&& *(CONST unsigned char*)(s+3) > ' ')
|
||||
s += 2;
|
||||
while(c = *(CONST unsigned char*)++s) {
|
||||
if (!(h = hexdig[c])) {
|
||||
if (c <= ' ') {
|
||||
@ -86,12 +92,25 @@ hexnan( CONST char **sp, FPI *fpi, ULong *x0)
|
||||
x1 = x;
|
||||
i = 0;
|
||||
}
|
||||
while(*(CONST unsigned char*)(s+1) <= ' ')
|
||||
++s;
|
||||
if (s[1] == '0' && (s[2] == 'x' || s[2] == 'X')
|
||||
&& *(CONST unsigned char*)(s+3) > ' ')
|
||||
s += 2;
|
||||
continue;
|
||||
}
|
||||
if (/*(*/ c == ')' && havedig) {
|
||||
*sp = s + 1;
|
||||
break;
|
||||
}
|
||||
#ifndef GDTOA_NON_PEDANTIC_NANCHECK
|
||||
do {
|
||||
if (/*(*/ c == ')') {
|
||||
*sp = s + 1;
|
||||
break;
|
||||
}
|
||||
} while(c = *++s);
|
||||
#endif
|
||||
return STRTOG_NaN;
|
||||
}
|
||||
havedig++;
|
||||
|
||||
16
strtoIg.c
16
strtoIg.c
@ -61,12 +61,16 @@ strtoIg(CONST char *s00, char **se, FPI *fpi, Long *exp, Bigint **B, int *rvp)
|
||||
if (rv & STRTOG_Inexlo) {
|
||||
swap = 0;
|
||||
b1 = increment(b1);
|
||||
if (fpi->sudden_underflow
|
||||
&& (rv & STRTOG_Retmask) == STRTOG_Zero) {
|
||||
b1->x[0] = 0;
|
||||
b1->x[nw1] = 1L << nb11;
|
||||
rv1 += STRTOG_Normal - STRTOG_Zero;
|
||||
rv1 &= ~STRTOG_Underflow;
|
||||
if ((rv & STRTOG_Retmask) == STRTOG_Zero) {
|
||||
if (fpi->sudden_underflow) {
|
||||
b1->x[0] = 0;
|
||||
b1->x[nw1] = 1L << nb11;
|
||||
rv1 += STRTOG_Normal - STRTOG_Zero;
|
||||
rv1 &= ~STRTOG_Underflow;
|
||||
goto swapcheck;
|
||||
}
|
||||
rv1 &= STRTOG_Inexlo | STRTOG_Underflow | STRTOG_Zero;
|
||||
rv1 |= STRTOG_Inexhi | STRTOG_Denormal;
|
||||
goto swapcheck;
|
||||
}
|
||||
if (b1->wds > nw
|
||||
|
||||
60
strtod.c
60
strtod.c
@ -42,16 +42,15 @@ THIS SOFTWARE.
|
||||
#ifndef NO_IEEE_Scale
|
||||
#define Avoid_Underflow
|
||||
#undef tinytens
|
||||
/* The factor of 2^53 in tinytens[4] helps us avoid setting the underflow */
|
||||
/* The factor of 2^106 in tinytens[4] helps us avoid setting the underflow */
|
||||
/* flag unnecessarily. It leads to a song and dance at the end of strtod. */
|
||||
static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128,
|
||||
9007199254740992.e-256
|
||||
9007199254740992.*9007199254740992.e-256
|
||||
};
|
||||
#endif
|
||||
#endif
|
||||
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
#define Rounding rounding
|
||||
#undef Check_FLT_ROUNDS
|
||||
#define Check_FLT_ROUNDS
|
||||
#else
|
||||
@ -79,9 +78,19 @@ strtod
|
||||
#ifdef SET_INEXACT
|
||||
int inexact, oldinexact;
|
||||
#endif
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
int rounding;
|
||||
#endif
|
||||
#ifdef Honor_FLT_ROUNDS /*{*/
|
||||
int Rounding;
|
||||
#ifdef Trust_FLT_ROUNDS /*{{ only define this if FLT_ROUNDS really works! */
|
||||
Rounding = Flt_Rounds;
|
||||
#else /*}{*/
|
||||
Rounding = 1;
|
||||
switch(fegetround()) {
|
||||
case FE_TOWARDZERO: Rounding = 0; break;
|
||||
case FE_UPWARD: Rounding = 2; break;
|
||||
case FE_DOWNWARD: Rounding = 3;
|
||||
}
|
||||
#endif /*}}*/
|
||||
#endif /*}*/
|
||||
|
||||
sign = nz0 = nz = decpt = 0;
|
||||
dval(rv) = 0.;
|
||||
@ -107,7 +116,7 @@ strtod
|
||||
}
|
||||
break2:
|
||||
if (*s == '0') {
|
||||
#ifndef NO_HEX_FP
|
||||
#ifndef NO_HEX_FP /*{{*/
|
||||
{
|
||||
static FPI fpi = { 53, 1-1023-53+1, 2046-1023-53+1, 1, SI };
|
||||
Long exp;
|
||||
@ -116,16 +125,20 @@ strtod
|
||||
case 'x':
|
||||
case 'X':
|
||||
{
|
||||
#if defined(FE_DOWNWARD) && defined(FE_TONEAREST) && defined(FE_TOWARDZERO) && defined(FE_UPWARD)
|
||||
#if defined(FE_DOWNWARD) && defined(FE_TONEAREST) && defined(FE_TOWARDZERO) && defined(FE_UPWARD) /*{{*/
|
||||
FPI fpi1 = fpi;
|
||||
#ifdef Honor_FLT_ROUNDS /*{{*/
|
||||
fpi1.rounding = Rounding;
|
||||
#else /*}{*/
|
||||
switch(fegetround()) {
|
||||
case FE_TOWARDZERO: fpi1.rounding = 0; break;
|
||||
case FE_UPWARD: fpi1.rounding = 2; break;
|
||||
case FE_DOWNWARD: fpi1.rounding = 3;
|
||||
}
|
||||
#else
|
||||
#endif /*}}*/
|
||||
#else /*}{*/
|
||||
#define fpi1 fpi
|
||||
#endif
|
||||
#endif /*}}*/
|
||||
switch((i = gethex(&s, &fpi1, &exp, &bb, sign)) & STRTOG_Retmask) {
|
||||
case STRTOG_NoNumber:
|
||||
s = s00;
|
||||
@ -379,12 +392,12 @@ strtod
|
||||
scale = 0;
|
||||
#endif
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if ((rounding = Flt_Rounds) >= 2) {
|
||||
if (Rounding >= 2) {
|
||||
if (sign)
|
||||
rounding = rounding == 2 ? 0 : 2;
|
||||
Rounding = Rounding == 2 ? 0 : 2;
|
||||
else
|
||||
if (rounding != 2)
|
||||
rounding = 0;
|
||||
if (Rounding != 2)
|
||||
Rounding = 0;
|
||||
}
|
||||
#endif
|
||||
#endif /*IEEE_Arith*/
|
||||
@ -403,7 +416,7 @@ strtod
|
||||
/* Can't trust HUGE_VAL */
|
||||
#ifdef IEEE_Arith
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
switch(rounding) {
|
||||
switch(Rounding) {
|
||||
case 0: /* toward 0 */
|
||||
case 3: /* toward -infinity */
|
||||
word0(rv) = Big0;
|
||||
@ -534,7 +547,7 @@ strtod
|
||||
bd2 -= bbe;
|
||||
bs2 = bb2;
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (rounding != 1)
|
||||
if (Rounding != 1)
|
||||
bs2++;
|
||||
#endif
|
||||
#ifdef Avoid_Underflow
|
||||
@ -592,7 +605,7 @@ strtod
|
||||
delta->sign = 0;
|
||||
i = cmp(delta, bs);
|
||||
#ifdef Honor_FLT_ROUNDS
|
||||
if (rounding != 1) {
|
||||
if (Rounding != 1) {
|
||||
if (i < 0) {
|
||||
/* Error is less than an ulp */
|
||||
if (!delta->x[0] && delta->wds <= 1) {
|
||||
@ -602,7 +615,7 @@ strtod
|
||||
#endif
|
||||
break;
|
||||
}
|
||||
if (rounding) {
|
||||
if (Rounding) {
|
||||
if (dsign) {
|
||||
adj = 1.;
|
||||
goto apply_adj;
|
||||
@ -648,10 +661,10 @@ strtod
|
||||
if (adj < 1.)
|
||||
adj = 1.;
|
||||
if (adj <= 0x7ffffffe) {
|
||||
/* adj = rounding ? ceil(adj) : floor(adj); */
|
||||
/* adj = Rounding ? ceil(adj) : floor(adj); */
|
||||
y = adj;
|
||||
if (y != adj) {
|
||||
if (!((rounding>>1) ^ dsign))
|
||||
if (!((Rounding>>1) ^ dsign))
|
||||
y++;
|
||||
adj = y;
|
||||
}
|
||||
@ -674,8 +687,11 @@ strtod
|
||||
#endif /*Sudden_Underflow*/
|
||||
#endif /*Avoid_Underflow*/
|
||||
adj *= ulp(dval(rv));
|
||||
if (dsign)
|
||||
if (dsign) {
|
||||
if (word0(rv) == Big0 && word1(rv) == Big1)
|
||||
goto ovfl;
|
||||
dval(rv) += adj;
|
||||
}
|
||||
else
|
||||
dval(rv) -= adj;
|
||||
goto cont;
|
||||
@ -768,7 +784,7 @@ strtod
|
||||
}
|
||||
#endif /*Avoid_Underflow*/
|
||||
L = (word0(rv) & Exp_mask) - Exp_msk1;
|
||||
#endif /*Sudden_Underflow}*/
|
||||
#endif /*Sudden_Underflow}}*/
|
||||
word0(rv) = L | Bndry_mask1;
|
||||
word1(rv) = 0xffffffff;
|
||||
#ifdef IBM
|
||||
|
||||
47
strtodg.c
47
strtodg.c
@ -89,7 +89,7 @@ increment(Bigint *b)
|
||||
return b;
|
||||
}
|
||||
|
||||
int
|
||||
void
|
||||
#ifdef KR_headers
|
||||
decrement(b) Bigint *b;
|
||||
#else
|
||||
@ -119,7 +119,6 @@ decrement(Bigint *b)
|
||||
*x++ = y & 0xffff;
|
||||
} while(borrow && x < xe);
|
||||
#endif
|
||||
return STRTOG_Inexlo;
|
||||
}
|
||||
|
||||
static int
|
||||
@ -206,9 +205,9 @@ rvOK
|
||||
goto ret;
|
||||
}
|
||||
switch(rd) {
|
||||
case 1:
|
||||
case 1: /* round down (toward -Infinity) */
|
||||
goto trunc;
|
||||
case 2:
|
||||
case 2: /* round up (toward +Infinity) */
|
||||
break;
|
||||
default: /* round near */
|
||||
k = bdif - 1;
|
||||
@ -330,7 +329,7 @@ strtodg
|
||||
CONST char *s, *s0, *s1;
|
||||
double adj, adj0, rv, tol;
|
||||
Long L;
|
||||
ULong y, z;
|
||||
ULong *b, *be, y, z;
|
||||
Bigint *ab, *bb, *bb1, *bd, *bd0, *bs, *delta, *rvb, *rvb0;
|
||||
|
||||
irv = STRTOG_Zero;
|
||||
@ -822,10 +821,8 @@ strtodg
|
||||
break;
|
||||
if (dsign) {
|
||||
rvb = increment(rvb);
|
||||
if ( (j = rvbits & kmask) !=0)
|
||||
j = ULbits - j;
|
||||
if (hi0bits(rvb->x[(rvb->wds - 1) >> kshift])
|
||||
!= j)
|
||||
j = kmask & (ULbits - (rvbits & kmask));
|
||||
if (hi0bits(rvb->x[rvb->wds - 1]) != j)
|
||||
rvbits++;
|
||||
irv = STRTOG_Normal | STRTOG_Inexhi;
|
||||
}
|
||||
@ -978,6 +975,29 @@ strtodg
|
||||
Bfree(bd0);
|
||||
Bfree(delta);
|
||||
if (rve > fpi->emax) {
|
||||
switch(fpi->rounding & 3) {
|
||||
case FPI_Round_near:
|
||||
goto huge;
|
||||
case FPI_Round_up:
|
||||
if (!sign)
|
||||
goto huge;
|
||||
break;
|
||||
case FPI_Round_down:
|
||||
if (sign)
|
||||
goto huge;
|
||||
}
|
||||
/* Round to largest representable magnitude */
|
||||
Bfree(rvb);
|
||||
rvb = 0;
|
||||
irv = STRTOG_Normal | STRTOG_Inexlo;
|
||||
*exp = fpi->emax;
|
||||
b = bits;
|
||||
be = b + (fpi->nbits >> 5) + 1;
|
||||
while(b < be)
|
||||
*b++ = -1;
|
||||
if ((j = fpi->nbits & 0x1f))
|
||||
*--be >>= (32 - j);
|
||||
goto ret;
|
||||
huge:
|
||||
rvb->wds = 0;
|
||||
irv = STRTOG_Infinite | STRTOG_Overflow | STRTOG_Inexhi;
|
||||
@ -992,12 +1012,19 @@ strtodg
|
||||
if (sudden_underflow) {
|
||||
rvb->wds = 0;
|
||||
irv = STRTOG_Underflow | STRTOG_Inexlo;
|
||||
#ifndef NO_ERRNO
|
||||
errno = ERANGE;
|
||||
#endif
|
||||
}
|
||||
else {
|
||||
irv = (irv & ~STRTOG_Retmask) |
|
||||
(rvb->wds > 0 ? STRTOG_Denormal : STRTOG_Zero);
|
||||
if (irv & STRTOG_Inexact)
|
||||
if (irv & STRTOG_Inexact) {
|
||||
irv |= STRTOG_Underflow;
|
||||
#ifndef NO_ERRNO
|
||||
errno = ERANGE;
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
if (se)
|
||||
|
||||
@ -55,7 +55,12 @@ logic (on double and double-double conversions).
|
||||
|
||||
Program strtodt tests strtod on some hard cases (in file testnos3)
|
||||
posted by Fred Tydeman to comp.arch.arithmetic on 26 Feb. 1996.
|
||||
To get correct results on Intel (x86) systems, the rounding precision
|
||||
must be set to 53 bits. This can be done, e.g., by invoking
|
||||
fpinit_ASL(), whose source appears in
|
||||
http://www.netlib.org/ampl/solvers/fpinit.c .
|
||||
|
||||
These are simple test programs, not meant for exhaustive testing,
|
||||
but for manually testing "interesting" cases. Paxson's testbase
|
||||
is good for more exhaustive testing, in part with random inputs.
|
||||
See ftp://ftp.ee.lbl.gov/testbase-report.ps.Z .
|
||||
|
||||
40
test/f.out
40
test/f.out
@ -124,7 +124,9 @@ strtof consumes 9 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 9 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 1.23e-320
|
||||
@ -132,7 +134,9 @@ strtof consumes 9 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 9 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 1.23e-20
|
||||
@ -160,7 +164,9 @@ strtof consumes 15 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 15 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 1.234567890123456789
|
||||
@ -188,7 +194,9 @@ strtof consumes 25 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 25 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 1.234567890123456789e-321
|
||||
@ -196,7 +204,9 @@ strtof consumes 25 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 25 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 1e23
|
||||
@ -224,7 +234,9 @@ strtof consumes 23 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 23 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 9.025971879324147880346310405869e-277
|
||||
@ -232,7 +244,9 @@ strtof consumes 37 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 37 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 9.025971879324147880346310405868e-277
|
||||
@ -240,7 +254,9 @@ strtof consumes 37 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 37 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 2.2250738585072014e-308
|
||||
@ -248,7 +264,9 @@ strtof consumes 23 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 23 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
|
||||
Input: 2.2250738585072013e-308
|
||||
@ -256,7 +274,9 @@ strtof consumes 23 bytes and returns 0 = #0
|
||||
g_ffmt(0) gives 1 bytes: "0"
|
||||
|
||||
strtoIf returns 80, consuming 23 bytes.
|
||||
fI[0] == fI[1] == strtof
|
||||
fI[0] = #0 = 0
|
||||
fI[1] = #1 = 1.4012985e-45
|
||||
fI[0] == strtof
|
||||
|
||||
Rounding mode for strtor... changed from 1 (nearest) to 0 (toward zero)
|
||||
|
||||
|
||||
@ -44,7 +44,14 @@ getround(int r, char *s)
|
||||
{
|
||||
int i;
|
||||
|
||||
i = atoi(s+1);
|
||||
while(*++s <= ' ') {
|
||||
if (!*s) {
|
||||
printf("Current round mode for strtor... is %d (%s).\n",
|
||||
r, dir[r]);
|
||||
return r;
|
||||
}
|
||||
}
|
||||
i = atoi(s);
|
||||
if (i >= 0 && i < 4) {
|
||||
printf("Rounding mode for strtor... ");
|
||||
if (i == r)
|
||||
|
||||
@ -1,11 +1,11 @@
|
||||
README e6ebdc91 2429
|
||||
README e86e9133 2692
|
||||
Qtest.c e8353ffc 5046
|
||||
dItest.c e33800ce 2371
|
||||
ddtest.c f9d06e7b 4984
|
||||
dtest.c ee533ac3 4078
|
||||
dt.c 7eeda57 6384
|
||||
ftest.c ec8a6654 3999
|
||||
getround.c f810968 2011
|
||||
getround.c 161043dd 2143
|
||||
strtoIdSI.c 7bfb88b 49
|
||||
strtoIddSI.c 72e8852 50
|
||||
strtodISI.c ed08b740 49
|
||||
@ -25,7 +25,7 @@ ddsi.out 1f94bbe2 10251
|
||||
dd.out e262456e 40923
|
||||
dtst.out e284ac98 23711
|
||||
d.out f271efc9 28131
|
||||
f.out 4b0bd51 21207
|
||||
f.out 9013e91 21537
|
||||
x.ou0 1402f834 25372
|
||||
xL.ou0 faa3a741 26363
|
||||
x.ou1 f1af5a00 34581
|
||||
|
||||
18
xsum0.out
18
xsum0.out
@ -1,7 +1,7 @@
|
||||
README f2477cff 14190
|
||||
README 1d9fab5a 14790
|
||||
arithchk.c ebbe5bc7 4075
|
||||
dmisc.c c8daa18 4682
|
||||
dtoa.c 6a7b6fe 16876
|
||||
dtoa.c 14f5b9e1 17138
|
||||
g_Qfmt.c f791d807 2839
|
||||
g__fmt.c 14dca85 2504
|
||||
g_ddfmt.c 10eae12a 3695
|
||||
@ -10,12 +10,12 @@ g_ffmt.c fb83cfb5 2429
|
||||
g_xLfmt.c f216a096 2686
|
||||
g_xfmt.c ed824bf3 2775
|
||||
gdtoa.c e29409a6 16988
|
||||
gdtoa.h f208c204 4780
|
||||
gdtoaimp.h e3c2a970 19441
|
||||
gethex.c dba1616 5201
|
||||
gdtoa.h fd46e927 4920
|
||||
gdtoaimp.h e753264b 19648
|
||||
gethex.c f42e6bdf 6247
|
||||
gmisc.c 1859d016 2084
|
||||
hd_init.c efdbe921 1797
|
||||
hexnan.c f7ea38f9 2958
|
||||
hexnan.c 13f362b7 3462
|
||||
makefile f890b12 2932
|
||||
misc.c 1757f7fc 14252
|
||||
qnan.c efd33d64 3417
|
||||
@ -24,12 +24,12 @@ strtoIQ.c 1809dfcf 1939
|
||||
strtoId.c f41ddac2 1931
|
||||
strtoIdd.c f13e3bc3 2105
|
||||
strtoIf.c f12c6af4 1875
|
||||
strtoIg.c ef30d392 3454
|
||||
strtoIg.c fd8c1bcf 3589
|
||||
strtoIx.c e50f716d 1960
|
||||
strtoIxL.c ea0b821b 1931
|
||||
strtod.c eec1df60 20532
|
||||
strtod.c f6943e52 21001
|
||||
strtodI.c 1c2440ce 3915
|
||||
strtodg.c f6c3dd52 19911
|
||||
strtodg.c 1c1bb220 20499
|
||||
strtodnrp.c af895e9 2538
|
||||
strtof.c 1c5192d3 2073
|
||||
strtopQ.c f116d4f0 2563
|
||||
|
||||
Loading…
Reference in New Issue
Block a user