$OpenBSD: patch-nspr_pr_src_misc_prdtoa_c,v 1.1 2013/06/23 18:36:50 landry Exp $
--- nspr/pr/src/misc/prdtoa.c.orig	Tue May 28 23:39:29 2013
+++ nspr/pr/src/misc/prdtoa.c	Wed Jun 12 21:26:27 2013
@@ -16,44 +16,14 @@
 #include "primpl.h"
 #include "prbit.h"
 
-#define MULTIPLE_THREADS
-#define ACQUIRE_DTOA_LOCK(n)	PR_Lock(dtoa_lock[n])
-#define FREE_DTOA_LOCK(n)	PR_Unlock(dtoa_lock[n])
-
-static PRLock *dtoa_lock[2];
-
 void _PR_InitDtoa(void)
 {
-    dtoa_lock[0] = PR_NewLock();
-    dtoa_lock[1] = PR_NewLock();
 }
 
 void _PR_CleanupDtoa(void)
 {
-    PR_DestroyLock(dtoa_lock[0]);
-    dtoa_lock[0] = NULL;
-    PR_DestroyLock(dtoa_lock[1]);
-    dtoa_lock[1] = NULL;
-
-    /* FIXME: deal with freelist and p5s. */
 }
 
-#if !defined(__ARM_EABI__) \
-    && (defined(__arm) || defined(__arm__) || defined(__arm26__) \
-    || defined(__arm32__))
-#define IEEE_ARM
-#elif defined(IS_LITTLE_ENDIAN)
-#define IEEE_8087
-#else
-#define IEEE_MC68k
-#endif
-
-#define Long PRInt32
-#define ULong PRUint32
-#define NO_LONG_LONG
-
-#define No_Hex_NaN
-
 /****************************************************************
  *
  * The author of this software is David M. Gay.
@@ -73,3326 +43,82 @@ void _PR_CleanupDtoa(void)
  *
  ***************************************************************/
 
-/* Please send bug reports to David M. Gay (dmg at acm dot org,
- * with " at " changed at "@" and " dot " changed to ".").	*/
-
-/* On a machine with IEEE extended-precision registers, it is
- * necessary to specify double-precision (53-bit) rounding precision
- * before invoking strtod or dtoa.  If the machine uses (the equivalent
- * of) Intel 80x87 arithmetic, the call
- *	_control87(PC_53, MCW_PC);
- * does this with many compilers.  Whether this or another call is
- * appropriate depends on the compiler; for this to work, it may be
- * necessary to #include "float.h" or another system-dependent header
- * file.
- */
-
-/* strtod for IEEE-, VAX-, and IBM-arithmetic machines.
- *
- * This strtod returns a nearest machine number to the input decimal
- * string (or sets errno to ERANGE).  With IEEE arithmetic, ties are
- * broken by the IEEE round-even rule.  Otherwise ties are broken by
- * biased rounding (add half and chop).
- *
- * Inspired loosely by William D. Clinger's paper "How to Read Floating
- * Point Numbers Accurately" [Proc. ACM SIGPLAN '90, pp. 92-101].
- *
- * Modifications:
- *
- *	1. We only require IEEE, IBM, or VAX double-precision
- *		arithmetic (not IEEE double-extended).
- *	2. We get by with floating-point arithmetic in a case that
- *		Clinger missed -- when we're computing d * 10^n
- *		for a small integer d and the integer n is not too
- *		much larger than 22 (the maximum integer k for which
- *		we can represent 10^k exactly), we may be able to
- *		compute (d*10^k) * 10^(e-k) with just one roundoff.
- *	3. Rather than a bit-at-a-time adjustment of the binary
- *		result in the hard case, we use floating-point
- *		arithmetic to determine the adjustment to within
- *		one bit; only in really hard cases do we need to
- *		compute a second residual.
- *	4. Because of 3., we don't need a large table of powers of 10
- *		for ten-to-e (just some small tables, e.g. of 10^k
- *		for 0 <= k <= 22).
- */
-
-/*
- * #define IEEE_8087 for IEEE-arithmetic machines where the least
- *	significant byte has the lowest address.
- * #define IEEE_MC68k for IEEE-arithmetic machines where the most
- *	significant byte has the lowest address.
- * #define IEEE_ARM for IEEE-arithmetic machines where the two words
- *	in a double are stored in big endian order but the two shorts
- *	in a word are still stored in little endian order.
- * #define Long int on machines with 32-bit ints and 64-bit longs.
- * #define IBM for IBM mainframe-style floating-point arithmetic.
- * #define VAX for VAX-style floating-point arithmetic (D_floating).
- * #define No_leftright to omit left-right logic in fast floating-point
- *	computation of dtoa.
- * #define Honor_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
- *	and strtod and dtoa should round accordingly.
- * #define Check_FLT_ROUNDS if FLT_ROUNDS can assume the values 2 or 3
- *	and Honor_FLT_ROUNDS is not #defined.
- * #define RND_PRODQUOT to use rnd_prod and rnd_quot (assembly routines
- *	that use extended-precision instructions to compute rounded
- *	products and quotients) with IBM.
- * #define ROUND_BIASED for IEEE-format with biased rounding.
- * #define Inaccurate_Divide for IEEE-format with correctly rounded
- *	products but inaccurate quotients, e.g., for Intel i860.
- * #define NO_LONG_LONG on machines that do not have a "long long"
- *	integer type (of >= 64 bits).  On such machines, you can
- *	#define Just_16 to store 16 bits per 32-bit Long when doing
- *	high-precision integer arithmetic.  Whether this speeds things
- *	up or slows things down depends on the machine and the number
- *	being converted.  If long long is available and the name is
- *	something other than "long long", #define Llong to be the name,
- *	and if "unsigned Llong" does not work as an unsigned version of
- *	Llong, #define #ULLong to be the corresponding unsigned type.
- * #define KR_headers for old-style C function headers.
- * #define Bad_float_h if your system lacks a float.h or if it does not
- *	define some or all of DBL_DIG, DBL_MAX_10_EXP, DBL_MAX_EXP,
- *	FLT_RADIX, FLT_ROUNDS, and DBL_MAX.
- * #define MALLOC your_malloc, where your_malloc(n) acts like malloc(n)
- *	if memory is available and otherwise does something you deem
- *	appropriate.  If MALLOC is undefined, malloc will be invoked
- *	directly -- and assumed always to succeed.  Similarly, if you
- *	want something other than the system's free() to be called to
- *	recycle memory acquired from MALLOC, #define FREE to be the
- *	name of the alternate routine.  (FREE or free is only called in
- *	pathological cases, e.g., in a dtoa call after a dtoa return in
- *	mode 3 with thousands of digits requested.)
- * #define Omit_Private_Memory to omit logic (added Jan. 1998) for making
- *	memory allocations from a private pool of memory when possible.
- *	When used, the private pool is PRIVATE_MEM bytes long:  2304 bytes,
- *	unless #defined to be a different length.  This default length
- *	suffices to get rid of MALLOC calls except for unusual cases,
- *	such as decimal-to-binary conversion of a very long string of
- *	digits.  The longest string dtoa can return is about 751 bytes
- *	long.  For conversions by strtod of strings of 800 digits and
- *	all dtoa conversions in single-threaded executions with 8-byte
- *	pointers, PRIVATE_MEM >= 7400 appears to suffice; with 4-byte
- *	pointers, PRIVATE_MEM >= 7112 appears adequate.
- * #define INFNAN_CHECK on IEEE systems to cause strtod to check for
- *	Infinity and NaN (case insensitively).  On some systems (e.g.,
- *	some HP systems), it may be necessary to #define NAN_WORD0
- *	appropriately -- to the most significant word of a quiet NaN.
- *	(On HP Series 700/800 machines, -DNAN_WORD0=0x7ff40000 works.)
- *	When INFNAN_CHECK is #defined and No_Hex_NaN is not #defined,
- *	strtod 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 52 fraction bits of the resulting NaN; if there are two
- *	or more strings of hex digits, the first is for the high 20 bits,
- *	the second and subsequent for the low 32 bits, with intervening
- *	white space ignored; but if this results in none of the 52
- *	fraction bits being on (an IEEE Infinity symbol), then NAN_WORD0
- *	and NAN_WORD1 are used instead.
- * #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
- *	by FREE_DTOA_LOCK(n) for n = 0 or 1.  (The second lock, accessed
- *	in pow5mult, ensures lazy evaluation of only one copy of high
- *	powers of 5; omitting this lock would introduce a small
- *	probability of wasting memory, but would otherwise be harmless.)
- *	You must also invoke freedtoa(s) to free the value s returned by
- *	dtoa.  You may do so whether or not MULTIPLE_THREADS is #defined.
- * #define NO_IEEE_Scale to disable new (Feb. 1997) logic in strtod that
- *	avoids underflows on inputs whose result does not underflow.
- *	If you #define NO_IEEE_Scale on a machine that uses IEEE-format
- *	floating-point numbers and flushes underflows to zero rather
- *	than implementing gradual underflow, then you must also #define
- *	Sudden_Underflow.
- * #define USE_LOCALE to use the current locale's decimal_point value.
- * #define SET_INEXACT if IEEE arithmetic is being used and extra
- *	computation should be done to set the inexact flag when the
- *	result is inexact and avoid setting inexact when the result
- *	is exact.  In this case, dtoa.c must be compiled in
- *	an environment, perhaps provided by #include "dtoa.c" in a
- *	suitable wrapper, that defines two functions,
- *		int get_inexact(void);
- *		void clear_inexact(void);
- *	such that get_inexact() returns a nonzero value if the
- *	inexact bit is already set, and clear_inexact() sets the
- *	inexact bit to 0.  When SET_INEXACT is #defined, strtod
- *	also does extra computations to set the underflow and overflow
- *	flags when appropriate (i.e., when the result is tiny and
- *	inexact or when it is a numeric value rounded to +-infinity).
- * #define NO_ERRNO if strtod should not assign errno = ERANGE when
- *	the result overflows to +-Infinity or underflows to 0.
- */
-
-#ifndef Long
-#define Long long
-#endif
-#ifndef ULong
-typedef unsigned Long ULong;
-#endif
-
-#ifdef DEBUG
-#include "stdio.h"
-#define Bug(x) {fprintf(stderr, "%s\n", x); exit(1);}
-#endif
-
 #include "stdlib.h"
 #include "string.h"
 
-#ifdef USE_LOCALE
-#include "locale.h"
-#endif
+#if defined(__m68k__) || defined(__sparc__) || defined(__i386__) || \
+    defined(__mips__) || defined(__mips64__) || defined(__ns32k__) || \
+    defined(__alpha__) || defined(__powerpc__) || defined(__m88k__) || \
+    defined(__hppa__) || defined(__amd64__) || defined(__sh__) || \
+    defined(__sparc64__) || \
+    (defined(__arm__) && defined(__VFP_FP__))
 
-#ifdef MALLOC
-#ifdef KR_headers
-extern char *MALLOC();
+#if BYTE_ORDER == BIG_ENDIAN
+#define IEEE_BIG_ENDIAN
 #else
-extern void *MALLOC(size_t);
+#define IEEE_LITTLE_ENDIAN
 #endif
-#else
-#define MALLOC malloc
 #endif
 
-#ifndef Omit_Private_Memory
-#ifndef PRIVATE_MEM
-#define PRIVATE_MEM 2304
-#endif
-#define PRIVATE_mem ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
-static double private_mem[PRIVATE_mem], *pmem_next = private_mem;
-#endif
-
-#undef IEEE_Arith
-#undef Avoid_Underflow
-#ifdef IEEE_MC68k
-#define IEEE_Arith
-#endif
-#ifdef IEEE_8087
-#define IEEE_Arith
-#endif
-#ifdef IEEE_ARM
-#define IEEE_Arith
-#endif
-
-#include "errno.h"
-
-#ifdef Bad_float_h
-
-#ifdef IEEE_Arith
-#define DBL_DIG 15
-#define DBL_MAX_10_EXP 308
-#define DBL_MAX_EXP 1024
-#define FLT_RADIX 2
-#endif /*IEEE_Arith*/
-
-#ifdef IBM
-#define DBL_DIG 16
-#define DBL_MAX_10_EXP 75
-#define DBL_MAX_EXP 63
-#define FLT_RADIX 16
-#define DBL_MAX 7.2370055773322621e+75
-#endif
-
-#ifdef VAX
-#define DBL_DIG 16
-#define DBL_MAX_10_EXP 38
-#define DBL_MAX_EXP 127
-#define FLT_RADIX 2
-#define DBL_MAX 1.7014118346046923e+38
-#endif
-
-#ifndef LONG_MAX
-#define LONG_MAX 2147483647
-#endif
-
-#else /* ifndef Bad_float_h */
-#include "float.h"
+#if defined(__arm__) && !defined(__VFP_FP__)
 /*
- * MacOS 10.2 defines the macro FLT_ROUNDS to an internal function
- * which does not exist on 10.1.  We can safely #define it to 1 here
- * to allow 10.2 builds to run on 10.1, since we can't use fesetround()
- * (which does not exist on 10.1 either).
+ * Although the CPU is little endian the FP has different
+ * byte and word endianness. The byte order is still little endian
+ * but the word order is big endian.
  */
-#if defined(XP_MACOSX) && (!defined(MAC_OS_X_VERSION_10_2) || \
-    MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_2)
-#undef FLT_ROUNDS
-#define FLT_ROUNDS 1
-#endif /* DT < 10.2 */
-#endif /* Bad_float_h */
-
-#ifndef __MATH_H__
-#include "math.h"
+#define IEEE_BIG_ENDIAN
 #endif
 
+#define Long    int32_t
+#define ULong   u_int32_t
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 #ifndef CONST
-#ifdef KR_headers
-#define CONST /* blank */
-#else
 #define CONST const
 #endif
-#endif
 
-#if defined(IEEE_8087) + defined(IEEE_MC68k) + defined(IEEE_ARM) + defined(VAX) + defined(IBM) != 1
-Exactly one of IEEE_8087, IEEE_MC68k, IEEE_ARM, VAX, or IBM should be defined.
-#endif
-
-typedef union { double d; ULong L[2]; } U;
-
-#define dval(x) (x).d
-#ifdef IEEE_8087
-#define word0(x) (x).L[1]
-#define word1(x) (x).L[0]
+typedef union {
+        double d;
+        ULong ul[2];
+} _double;
+#define value(x) ((x).d)
+#ifdef IEEE_LITTLE_ENDIAN
+#define word0(x) ((x).ul[1])
+#define word1(x) ((x).ul[0])
 #else
-#define word0(x) (x).L[0]
-#define word1(x) (x).L[1]
+#define word0(x) ((x).ul[0])
+#define word1(x) ((x).ul[1])
 #endif
 
-/* The following definition of Storeinc is appropriate for MIPS processors.
- * An alternative that might be better on some machines is
- * #define Storeinc(a,b,c) (*a++ = b << 16 | c & 0xffff)
- */
-#if defined(IEEE_8087) + defined(IEEE_ARM) + defined(VAX)
-#define Storeinc(a,b,c) (((unsigned short *)a)[1] = (unsigned short)b, \
-((unsigned short *)a)[0] = (unsigned short)c, a++)
-#else
-#define Storeinc(a,b,c) (((unsigned short *)a)[0] = (unsigned short)b, \
-((unsigned short *)a)[1] = (unsigned short)c, a++)
-#endif
-
-/* #define P DBL_MANT_DIG */
-/* Ten_pmax = floor(P*log(2)/log(5)) */
-/* Bletch = (highest power of 2 < DBL_MAX_10_EXP) / 16 */
-/* Quick_max = floor((P-1)*log(FLT_RADIX)/log(10) - 1) */
-/* Int_max = floor(P*log(FLT_RADIX)/log(10) - 1) */
-
-#ifdef IEEE_Arith
-#define Exp_shift  20
-#define Exp_shift1 20
-#define Exp_msk1    0x100000
-#define Exp_msk11   0x100000
+#if defined(IEEE_LITTLE_ENDIAN) + defined(IEEE_BIG_ENDIAN)
 #define Exp_mask  0x7ff00000
-#define P 53
-#define Bias 1023
-#define Emin (-1022)
-#define Exp_1  0x3ff00000
-#define Exp_11 0x3ff00000
-#define Ebits 11
-#define Frac_mask  0xfffff
-#define Frac_mask1 0xfffff
-#define Ten_pmax 22
-#define Bletch 0x10
-#define Bndry_mask  0xfffff
-#define Bndry_mask1 0xfffff
-#define LSB 1
 #define Sign_bit 0x80000000
-#define Log2P 1
-#define Tiny0 0
-#define Tiny1 1
-#define Quick_max 14
-#define Int_max 14
-#ifndef NO_IEEE_Scale
-#define Avoid_Underflow
-#ifdef Flush_Denorm	/* debugging option */
-#undef Sudden_Underflow
-#endif
-#endif
-
-#ifndef Flt_Rounds
-#ifdef FLT_ROUNDS
-#define Flt_Rounds FLT_ROUNDS
 #else
-#define Flt_Rounds 1
-#endif
-#endif /*Flt_Rounds*/
-
-#ifdef Honor_FLT_ROUNDS
-#define Rounding rounding
-#undef Check_FLT_ROUNDS
-#define Check_FLT_ROUNDS
-#else
-#define Rounding Flt_Rounds
-#endif
-
-#else /* ifndef IEEE_Arith */
-#undef Check_FLT_ROUNDS
-#undef Honor_FLT_ROUNDS
-#undef SET_INEXACT
-#undef  Sudden_Underflow
-#define Sudden_Underflow
 #ifdef IBM
-#undef Flt_Rounds
-#define Flt_Rounds 0
-#define Exp_shift  24
-#define Exp_shift1 24
-#define Exp_msk1   0x1000000
-#define Exp_msk11  0x1000000
 #define Exp_mask  0x7f000000
-#define P 14
-#define Bias 65
-#define Exp_1  0x41000000
-#define Exp_11 0x41000000
-#define Ebits 8	/* exponent has 7 bits, but 8 is the right value in b2d */
-#define Frac_mask  0xffffff
-#define Frac_mask1 0xffffff
-#define Bletch 4
-#define Ten_pmax 22
-#define Bndry_mask  0xefffff
-#define Bndry_mask1 0xffffff
-#define LSB 1
 #define Sign_bit 0x80000000
-#define Log2P 4
-#define Tiny0 0x100000
-#define Tiny1 0
-#define Quick_max 14
-#define Int_max 15
 #else /* VAX */
-#undef Flt_Rounds
-#define Flt_Rounds 1
-#define Exp_shift  23
-#define Exp_shift1 7
-#define Exp_msk1    0x80
-#define Exp_msk11   0x800000
 #define Exp_mask  0x7f80
-#define P 56
-#define Bias 129
-#define Exp_1  0x40800000
-#define Exp_11 0x4080
-#define Ebits 8
-#define Frac_mask  0x7fffff
-#define Frac_mask1 0xffff007f
-#define Ten_pmax 24
-#define Bletch 2
-#define Bndry_mask  0xffff007f
-#define Bndry_mask1 0xffff007f
-#define LSB 0x10000
 #define Sign_bit 0x8000
-#define Log2P 1
-#define Tiny0 0x80
-#define Tiny1 0
-#define Quick_max 15
-#define Int_max 15
 #endif /* IBM, VAX */
-#endif /* IEEE_Arith */
-
-#ifndef IEEE_Arith
-#define ROUND_BIASED
 #endif
 
-#ifdef RND_PRODQUOT
-#define rounded_product(a,b) a = rnd_prod(a, b)
-#define rounded_quotient(a,b) a = rnd_quot(a, b)
-#ifdef KR_headers
-extern double rnd_prod(), rnd_quot();
-#else
-extern double rnd_prod(double, double), rnd_quot(double, double);
-#endif
-#else
-#define rounded_product(a,b) a *= b
-#define rounded_quotient(a,b) a /= b
-#endif
+char *__dtoa(double d, int mode, int ndigits, int *decpt, int *sign, char **rve);
+void __freedtoa(char *s);
 
-#define Big0 (Frac_mask1 | Exp_msk1*(DBL_MAX_EXP+Bias-1))
-#define Big1 0xffffffff
-
-#ifndef Pack_32
-#define Pack_32
+#ifdef __cplusplus
+}
 #endif
 
-#ifdef KR_headers
-#define FFFFFFFF ((((unsigned long)0xffff)<<16)|(unsigned long)0xffff)
-#else
-#define FFFFFFFF 0xffffffffUL
-#endif
-
-#ifdef NO_LONG_LONG
-#undef ULLong
-#ifdef Just_16
-#undef Pack_32
-/* When Pack_32 is not defined, we store 16 bits per 32-bit Long.
- * This makes some inner loops simpler and sometimes saves work
- * during multiplications, but it often seems to make things slightly
- * slower.  Hence the default is now to store 32 bits per Long.
- */
-#endif
-#else	/* long long available */
-#ifndef Llong
-#define Llong long long
-#endif
-#ifndef ULLong
-#define ULLong unsigned Llong
-#endif
-#endif /* NO_LONG_LONG */
-
-#ifndef MULTIPLE_THREADS
-#define ACQUIRE_DTOA_LOCK(n)	/*nothing*/
-#define FREE_DTOA_LOCK(n)	/*nothing*/
-#endif
-
-#define Kmax 7
-
- struct
-Bigint {
-	struct Bigint *next;
-	int k, maxwds, sign, wds;
-	ULong x[1];
-	};
-
- typedef struct Bigint Bigint;
-
- static Bigint *freelist[Kmax+1];
-
- static Bigint *
-Balloc
-#ifdef KR_headers
-	(k) int k;
-#else
-	(int k)
-#endif
+PR_IMPLEMENT(double)
+PR_strtod(CONST char *s00, char **se)
 {
-	int x;
-	Bigint *rv;
-#ifndef Omit_Private_Memory
-	unsigned int len;
-#endif
-
-	ACQUIRE_DTOA_LOCK(0);
-	/* The k > Kmax case does not need ACQUIRE_DTOA_LOCK(0), */
-	/* but this case seems very unlikely. */
-	if (k <= Kmax && (rv = freelist[k]))
-		freelist[k] = rv->next;
-	else {
-		x = 1 << k;
-#ifdef Omit_Private_Memory
-		rv = (Bigint *)MALLOC(sizeof(Bigint) + (x-1)*sizeof(ULong));
-#else
-		len = (sizeof(Bigint) + (x-1)*sizeof(ULong) + sizeof(double) - 1)
-			/sizeof(double);
-		if (k <= Kmax && pmem_next - private_mem + len <= PRIVATE_mem) {
-			rv = (Bigint*)pmem_next;
-			pmem_next += len;
-			}
-		else
-			rv = (Bigint*)MALLOC(len*sizeof(double));
-#endif
-		rv->k = k;
-		rv->maxwds = x;
-		}
-	FREE_DTOA_LOCK(0);
-	rv->sign = rv->wds = 0;
-	return rv;
-	}
-
- static void
-Bfree
-#ifdef KR_headers
-	(v) Bigint *v;
-#else
-	(Bigint *v)
-#endif
-{
-	if (v) {
-		if (v->k > Kmax)
-#ifdef FREE
-			FREE((void*)v);
-#else
-			free((void*)v);
-#endif
-		else {
-			ACQUIRE_DTOA_LOCK(0);
-			v->next = freelist[v->k];
-			freelist[v->k] = v;
-			FREE_DTOA_LOCK(0);
-			}
-		}
-	}
-
-#define Bcopy(x,y) memcpy((char *)&x->sign, (char *)&y->sign, \
-y->wds*sizeof(Long) + 2*sizeof(int))
-
- static Bigint *
-multadd
-#ifdef KR_headers
-	(b, m, a) Bigint *b; int m, a;
-#else
-	(Bigint *b, int m, int a)	/* multiply by m and add a */
-#endif
-{
-	int i, wds;
-#ifdef ULLong
-	ULong *x;
-	ULLong carry, y;
-#else
-	ULong carry, *x, y;
-#ifdef Pack_32
-	ULong xi, z;
-#endif
-#endif
-	Bigint *b1;
-
-	wds = b->wds;
-	x = b->x;
-	i = 0;
-	carry = a;
-	do {
-#ifdef ULLong
-		y = *x * (ULLong)m + carry;
-		carry = y >> 32;
-		*x++ = y & FFFFFFFF;
-#else
-#ifdef Pack_32
-		xi = *x;
-		y = (xi & 0xffff) * m + carry;
-		z = (xi >> 16) * m + (y >> 16);
-		carry = z >> 16;
-		*x++ = (z << 16) + (y & 0xffff);
-#else
-		y = *x * m + carry;
-		carry = y >> 16;
-		*x++ = y & 0xffff;
-#endif
-#endif
-		}
-		while(++i < wds);
-	if (carry) {
-		if (wds >= b->maxwds) {
-			b1 = Balloc(b->k+1);
-			Bcopy(b1, b);
-			Bfree(b);
-			b = b1;
-			}
-		b->x[wds++] = carry;
-		b->wds = wds;
-		}
-	return b;
-	}
-
- static Bigint *
-s2b
-#ifdef KR_headers
-	(s, nd0, nd, y9) CONST char *s; int nd0, nd; ULong y9;
-#else
-	(CONST char *s, int nd0, int nd, ULong y9)
-#endif
-{
-	Bigint *b;
-	int i, k;
-	Long x, y;
-
-	x = (nd + 8) / 9;
-	for(k = 0, y = 1; x > y; y <<= 1, k++) ;
-#ifdef Pack_32
-	b = Balloc(k);
-	b->x[0] = y9;
-	b->wds = 1;
-#else
-	b = Balloc(k+1);
-	b->x[0] = y9 & 0xffff;
-	b->wds = (b->x[1] = y9 >> 16) ? 2 : 1;
-#endif
-
-	i = 9;
-	if (9 < nd0) {
-		s += 9;
-		do b = multadd(b, 10, *s++ - '0');
-			while(++i < nd0);
-		s++;
-		}
-	else
-		s += 10;
-	for(; i < nd; i++)
-		b = multadd(b, 10, *s++ - '0');
-	return b;
-	}
-
- static int
-hi0bits
-#ifdef KR_headers
-	(x) register ULong x;
-#else
-	(register ULong x)
-#endif
-{
-#ifdef PR_HAVE_BUILTIN_BITSCAN32
-	return( (!x) ? 32 : pr_bitscan_clz32(x) );
-#else
-	register int k = 0;
-
-	if (!(x & 0xffff0000)) {
-		k = 16;
-		x <<= 16;
-		}
-	if (!(x & 0xff000000)) {
-		k += 8;
-		x <<= 8;
-		}
-	if (!(x & 0xf0000000)) {
-		k += 4;
-		x <<= 4;
-		}
-	if (!(x & 0xc0000000)) {
-		k += 2;
-		x <<= 2;
-		}
-	if (!(x & 0x80000000)) {
-		k++;
-		if (!(x & 0x40000000))
-			return 32;
-		}
-	return k;
-#endif /* PR_HAVE_BUILTIN_BITSCAN32 */
-	}
-
- static int
-lo0bits
-#ifdef KR_headers
-	(y) ULong *y;
-#else
-	(ULong *y)
-#endif
-{
-#ifdef PR_HAVE_BUILTIN_BITSCAN32
-	int k;
-	ULong x = *y;
-
-	if (x>1)
-		*y = ( x >> (k = pr_bitscan_ctz32(x)) );
-	else
-		k = ((x ^ 1) << 5);
-#else
-	register int k;
-	register ULong x = *y;
-
-	if (x & 7) {
-		if (x & 1)
-			return 0;
-		if (x & 2) {
-			*y = x >> 1;
-			return 1;
-			}
-		*y = x >> 2;
-		return 2;
-		}
-	k = 0;
-	if (!(x & 0xffff)) {
-		k = 16;
-		x >>= 16;
-		}
-	if (!(x & 0xff)) {
-		k += 8;
-		x >>= 8;
-		}
-	if (!(x & 0xf)) {
-		k += 4;
-		x >>= 4;
-		}
-	if (!(x & 0x3)) {
-		k += 2;
-		x >>= 2;
-		}
-	if (!(x & 1)) {
-		k++;
-		x >>= 1;
-		if (!x)
-			return 32;
-		}
-	*y = x;
-#endif /* PR_HAVE_BUILTIN_BITSCAN32 */
-	return k;
-	}
-
- static Bigint *
-i2b
-#ifdef KR_headers
-	(i) int i;
-#else
-	(int i)
-#endif
-{
-	Bigint *b;
-
-	b = Balloc(1);
-	b->x[0] = i;
-	b->wds = 1;
-	return b;
-	}
-
- static Bigint *
-mult
-#ifdef KR_headers
-	(a, b) Bigint *a, *b;
-#else
-	(Bigint *a, Bigint *b)
-#endif
-{
-	Bigint *c;
-	int k, wa, wb, wc;
-	ULong *x, *xa, *xae, *xb, *xbe, *xc, *xc0;
-	ULong y;
-#ifdef ULLong
-	ULLong carry, z;
-#else
-	ULong carry, z;
-#ifdef Pack_32
-	ULong z2;
-#endif
-#endif
-
-	if (a->wds < b->wds) {
-		c = a;
-		a = b;
-		b = c;
-		}
-	k = a->k;
-	wa = a->wds;
-	wb = b->wds;
-	wc = wa + wb;
-	if (wc > a->maxwds)
-		k++;
-	c = Balloc(k);
-	for(x = c->x, xa = x + wc; x < xa; x++)
-		*x = 0;
-	xa = a->x;
-	xae = xa + wa;
-	xb = b->x;
-	xbe = xb + wb;
-	xc0 = c->x;
-#ifdef ULLong
-	for(; xb < xbe; xc0++) {
-		if (y = *xb++) {
-			x = xa;
-			xc = xc0;
-			carry = 0;
-			do {
-				z = *x++ * (ULLong)y + *xc + carry;
-				carry = z >> 32;
-				*xc++ = z & FFFFFFFF;
-				}
-				while(x < xae);
-			*xc = carry;
-			}
-		}
-#else
-#ifdef Pack_32
-	for(; xb < xbe; xb++, xc0++) {
-		if (y = *xb & 0xffff) {
-			x = xa;
-			xc = xc0;
-			carry = 0;
-			do {
-				z = (*x & 0xffff) * y + (*xc & 0xffff) + carry;
-				carry = z >> 16;
-				z2 = (*x++ >> 16) * y + (*xc >> 16) + carry;
-				carry = z2 >> 16;
-				Storeinc(xc, z2, z);
-				}
-				while(x < xae);
-			*xc = carry;
-			}
-		if (y = *xb >> 16) {
-			x = xa;
-			xc = xc0;
-			carry = 0;
-			z2 = *xc;
-			do {
-				z = (*x & 0xffff) * y + (*xc >> 16) + carry;
-				carry = z >> 16;
-				Storeinc(xc, z, z2);
-				z2 = (*x++ >> 16) * y + (*xc & 0xffff) + carry;
-				carry = z2 >> 16;
-				}
-				while(x < xae);
-			*xc = z2;
-			}
-		}
-#else
-	for(; xb < xbe; xc0++) {
-		if (y = *xb++) {
-			x = xa;
-			xc = xc0;
-			carry = 0;
-			do {
-				z = *x++ * y + *xc + carry;
-				carry = z >> 16;
-				*xc++ = z & 0xffff;
-				}
-				while(x < xae);
-			*xc = carry;
-			}
-		}
-#endif
-#endif
-	for(xc0 = c->x, xc = xc0 + wc; wc > 0 && !*--xc; --wc) ;
-	c->wds = wc;
-	return c;
-	}
-
- static Bigint *p5s;
-
- static Bigint *
-pow5mult
-#ifdef KR_headers
-	(b, k) Bigint *b; int k;
-#else
-	(Bigint *b, int k)
-#endif
-{
-	Bigint *b1, *p5, *p51;
-	int i;
-	static int p05[3] = { 5, 25, 125 };
-
-	if (i = k & 3)
-		b = multadd(b, p05[i-1], 0);
-
-	if (!(k >>= 2))
-		return b;
-	if (!(p5 = p5s)) {
-		/* first time */
-#ifdef MULTIPLE_THREADS
-		ACQUIRE_DTOA_LOCK(1);
-		if (!(p5 = p5s)) {
-			p5 = p5s = i2b(625);
-			p5->next = 0;
-			}
-		FREE_DTOA_LOCK(1);
-#else
-		p5 = p5s = i2b(625);
-		p5->next = 0;
-#endif
-		}
-	for(;;) {
-		if (k & 1) {
-			b1 = mult(b, p5);
-			Bfree(b);
-			b = b1;
-			}
-		if (!(k >>= 1))
-			break;
-		if (!(p51 = p5->next)) {
-#ifdef MULTIPLE_THREADS
-			ACQUIRE_DTOA_LOCK(1);
-			if (!(p51 = p5->next)) {
-				p51 = p5->next = mult(p5,p5);
-				p51->next = 0;
-				}
-			FREE_DTOA_LOCK(1);
-#else
-			p51 = p5->next = mult(p5,p5);
-			p51->next = 0;
-#endif
-			}
-		p5 = p51;
-		}
-	return b;
-	}
-
- static Bigint *
-lshift
-#ifdef KR_headers
-	(b, k) Bigint *b; int k;
-#else
-	(Bigint *b, int k)
-#endif
-{
-	int i, k1, n, n1;
-	Bigint *b1;
-	ULong *x, *x1, *xe, z;
-
-#ifdef Pack_32
-	n = k >> 5;
-#else
-	n = k >> 4;
-#endif
-	k1 = b->k;
-	n1 = n + b->wds + 1;
-	for(i = b->maxwds; n1 > i; i <<= 1)
-		k1++;
-	b1 = Balloc(k1);
-	x1 = b1->x;
-	for(i = 0; i < n; i++)
-		*x1++ = 0;
-	x = b->x;
-	xe = x + b->wds;
-#ifdef Pack_32
-	if (k &= 0x1f) {
-		k1 = 32 - k;
-		z = 0;
-		do {
-			*x1++ = *x << k | z;
-			z = *x++ >> k1;
-			}
-			while(x < xe);
-		if (*x1 = z)
-			++n1;
-		}
-#else
-	if (k &= 0xf) {
-		k1 = 16 - k;
-		z = 0;
-		do {
-			*x1++ = *x << k  & 0xffff | z;
-			z = *x++ >> k1;
-			}
-			while(x < xe);
-		if (*x1 = z)
-			++n1;
-		}
-#endif
-	else do
-		*x1++ = *x++;
-		while(x < xe);
-	b1->wds = n1 - 1;
-	Bfree(b);
-	return b1;
-	}
-
- static int
-cmp
-#ifdef KR_headers
-	(a, b) Bigint *a, *b;
-#else
-	(Bigint *a, Bigint *b)
-#endif
-{
-	ULong *xa, *xa0, *xb, *xb0;
-	int i, j;
-
-	i = a->wds;
-	j = b->wds;
-#ifdef DEBUG
-	if (i > 1 && !a->x[i-1])
-		Bug("cmp called with a->x[a->wds-1] == 0");
-	if (j > 1 && !b->x[j-1])
-		Bug("cmp called with b->x[b->wds-1] == 0");
-#endif
-	if (i -= j)
-		return i;
-	xa0 = a->x;
-	xa = xa0 + j;
-	xb0 = b->x;
-	xb = xb0 + j;
-	for(;;) {
-		if (*--xa != *--xb)
-			return *xa < *xb ? -1 : 1;
-		if (xa <= xa0)
-			break;
-		}
-	return 0;
-	}
-
- static Bigint *
-diff
-#ifdef KR_headers
-	(a, b) Bigint *a, *b;
-#else
-	(Bigint *a, Bigint *b)
-#endif
-{
-	Bigint *c;
-	int i, wa, wb;
-	ULong *xa, *xae, *xb, *xbe, *xc;
-#ifdef ULLong
-	ULLong borrow, y;
-#else
-	ULong borrow, y;
-#ifdef Pack_32
-	ULong z;
-#endif
-#endif
-
-	i = cmp(a,b);
-	if (!i) {
-		c = Balloc(0);
-		c->wds = 1;
-		c->x[0] = 0;
-		return c;
-		}
-	if (i < 0) {
-		c = a;
-		a = b;
-		b = c;
-		i = 1;
-		}
-	else
-		i = 0;
-	c = Balloc(a->k);
-	c->sign = i;
-	wa = a->wds;
-	xa = a->x;
-	xae = xa + wa;
-	wb = b->wds;
-	xb = b->x;
-	xbe = xb + wb;
-	xc = c->x;
-	borrow = 0;
-#ifdef ULLong
-	do {
-		y = (ULLong)*xa++ - *xb++ - borrow;
-		borrow = y >> 32 & (ULong)1;
-		*xc++ = y & FFFFFFFF;
-		}
-		while(xb < xbe);
-	while(xa < xae) {
-		y = *xa++ - borrow;
-		borrow = y >> 32 & (ULong)1;
-		*xc++ = y & FFFFFFFF;
-		}
-#else
-#ifdef Pack_32
-	do {
-		y = (*xa & 0xffff) - (*xb & 0xffff) - borrow;
-		borrow = (y & 0x10000) >> 16;
-		z = (*xa++ >> 16) - (*xb++ >> 16) - borrow;
-		borrow = (z & 0x10000) >> 16;
-		Storeinc(xc, z, y);
-		}
-		while(xb < xbe);
-	while(xa < xae) {
-		y = (*xa & 0xffff) - borrow;
-		borrow = (y & 0x10000) >> 16;
-		z = (*xa++ >> 16) - borrow;
-		borrow = (z & 0x10000) >> 16;
-		Storeinc(xc, z, y);
-		}
-#else
-	do {
-		y = *xa++ - *xb++ - borrow;
-		borrow = (y & 0x10000) >> 16;
-		*xc++ = y & 0xffff;
-		}
-		while(xb < xbe);
-	while(xa < xae) {
-		y = *xa++ - borrow;
-		borrow = (y & 0x10000) >> 16;
-		*xc++ = y & 0xffff;
-		}
-#endif
-#endif
-	while(!*--xc)
-		wa--;
-	c->wds = wa;
-	return c;
-	}
-
- static double
-ulp
-#ifdef KR_headers
-	(dx) double dx;
-#else
-	(double dx)
-#endif
-{
-	register Long L;
-	U x, a;
-
-	dval(x) = dx;
-	L = (word0(x) & Exp_mask) - (P-1)*Exp_msk1;
-#ifndef Avoid_Underflow
-#ifndef Sudden_Underflow
-	if (L > 0) {
-#endif
-#endif
-#ifdef IBM
-		L |= Exp_msk1 >> 4;
-#endif
-		word0(a) = L;
-		word1(a) = 0;
-#ifndef Avoid_Underflow
-#ifndef Sudden_Underflow
-		}
-	else {
-		L = -L >> Exp_shift;
-		if (L < Exp_shift) {
-			word0(a) = 0x80000 >> L;
-			word1(a) = 0;
-			}
-		else {
-			word0(a) = 0;
-			L -= Exp_shift;
-			word1(a) = L >= 31 ? 1 : 1 << 31 - L;
-			}
-		}
-#endif
-#endif
-	return dval(a);
-	}
-
- static double
-b2d
-#ifdef KR_headers
-	(a, e) Bigint *a; int *e;
-#else
-	(Bigint *a, int *e)
-#endif
-{
-	ULong *xa, *xa0, w, y, z;
-	int k;
-	U d;
-#ifdef VAX
-	ULong d0, d1;
-#else
-#define d0 word0(d)
-#define d1 word1(d)
-#endif
-
-	xa0 = a->x;
-	xa = xa0 + a->wds;
-	y = *--xa;
-#ifdef DEBUG
-	if (!y) Bug("zero y in b2d");
-#endif
-	k = hi0bits(y);
-	*e = 32 - k;
-#ifdef Pack_32
-	if (k < Ebits) {
-		d0 = Exp_1 | y >> Ebits - k;
-		w = xa > xa0 ? *--xa : 0;
-		d1 = y << (32-Ebits) + k | w >> Ebits - k;
-		goto ret_d;
-		}
-	z = xa > xa0 ? *--xa : 0;
-	if (k -= Ebits) {
-		d0 = Exp_1 | y << k | z >> 32 - k;
-		y = xa > xa0 ? *--xa : 0;
-		d1 = z << k | y >> 32 - k;
-		}
-	else {
-		d0 = Exp_1 | y;
-		d1 = z;
-		}
-#else
-	if (k < Ebits + 16) {
-		z = xa > xa0 ? *--xa : 0;
-		d0 = Exp_1 | y << k - Ebits | z >> Ebits + 16 - k;
-		w = xa > xa0 ? *--xa : 0;
-		y = xa > xa0 ? *--xa : 0;
-		d1 = z << k + 16 - Ebits | w << k - Ebits | y >> 16 + Ebits - k;
-		goto ret_d;
-		}
-	z = xa > xa0 ? *--xa : 0;
-	w = xa > xa0 ? *--xa : 0;
-	k -= Ebits + 16;
-	d0 = Exp_1 | y << k + 16 | z << k | w >> 16 - k;
-	y = xa > xa0 ? *--xa : 0;
-	d1 = w << k + 16 | y << k;
-#endif
- ret_d:
-#ifdef VAX
-	word0(d) = d0 >> 16 | d0 << 16;
-	word1(d) = d1 >> 16 | d1 << 16;
-#else
-#undef d0
-#undef d1
-#endif
-	return dval(d);
-	}
-
- static Bigint *
-d2b
-#ifdef KR_headers
-	(dd, e, bits) double dd; int *e, *bits;
-#else
-	(double dd, int *e, int *bits)
-#endif
-{
-	U d;
-	Bigint *b;
-	int de, k;
-	ULong *x, y, z;
-#ifndef Sudden_Underflow
-	int i;
-#endif
-#ifdef VAX
-	ULong d0, d1;
-#endif
-
-	dval(d) = dd;
-#ifdef VAX
-	d0 = word0(d) >> 16 | word0(d) << 16;
-	d1 = word1(d) >> 16 | word1(d) << 16;
-#else
-#define d0 word0(d)
-#define d1 word1(d)
-#endif
-
-#ifdef Pack_32
-	b = Balloc(1);
-#else
-	b = Balloc(2);
-#endif
-	x = b->x;
-
-	z = d0 & Frac_mask;
-	d0 &= 0x7fffffff;	/* clear sign bit, which we ignore */
-#ifdef Sudden_Underflow
-	de = (int)(d0 >> Exp_shift);
-#ifndef IBM
-	z |= Exp_msk11;
-#endif
-#else
-	if (de = (int)(d0 >> Exp_shift))
-		z |= Exp_msk1;
-#endif
-#ifdef Pack_32
-	if (y = d1) {
-		if (k = lo0bits(&y)) {
-			x[0] = y | z << 32 - k;
-			z >>= k;
-			}
-		else
-			x[0] = y;
-#ifndef Sudden_Underflow
-		i =
-#endif
-		    b->wds = (x[1] = z) ? 2 : 1;
-		}
-	else {
-		k = lo0bits(&z);
-		x[0] = z;
-#ifndef Sudden_Underflow
-		i =
-#endif
-		    b->wds = 1;
-		k += 32;
-		}
-#else
-	if (y = d1) {
-		if (k = lo0bits(&y))
-			if (k >= 16) {
-				x[0] = y | z << 32 - k & 0xffff;
-				x[1] = z >> k - 16 & 0xffff;
-				x[2] = z >> k;
-				i = 2;
-				}
-			else {
-				x[0] = y & 0xffff;
-				x[1] = y >> 16 | z << 16 - k & 0xffff;
-				x[2] = z >> k & 0xffff;
-				x[3] = z >> k+16;
-				i = 3;
-				}
-		else {
-			x[0] = y & 0xffff;
-			x[1] = y >> 16;
-			x[2] = z & 0xffff;
-			x[3] = z >> 16;
-			i = 3;
-			}
-		}
-	else {
-#ifdef DEBUG
-		if (!z)
-			Bug("Zero passed to d2b");
-#endif
-		k = lo0bits(&z);
-		if (k >= 16) {
-			x[0] = z;
-			i = 0;
-			}
-		else {
-			x[0] = z & 0xffff;
-			x[1] = z >> 16;
-			i = 1;
-			}
-		k += 32;
-		}
-	while(!x[i])
-		--i;
-	b->wds = i + 1;
-#endif
-#ifndef Sudden_Underflow
-	if (de) {
-#endif
-#ifdef IBM
-		*e = (de - Bias - (P-1) << 2) + k;
-		*bits = 4*P + 8 - k - hi0bits(word0(d) & Frac_mask);
-#else
-		*e = de - Bias - (P-1) + k;
-		*bits = P - k;
-#endif
-#ifndef Sudden_Underflow
-		}
-	else {
-		*e = de - Bias - (P-1) + 1 + k;
-#ifdef Pack_32
-		*bits = 32*i - hi0bits(x[i-1]);
-#else
-		*bits = (i+2)*16 - hi0bits(x[i]);
-#endif
-		}
-#endif
-	return b;
-	}
-#undef d0
-#undef d1
-
- static double
-ratio
-#ifdef KR_headers
-	(a, b) Bigint *a, *b;
-#else
-	(Bigint *a, Bigint *b)
-#endif
-{
-	U da, db;
-	int k, ka, kb;
-
-	dval(da) = b2d(a, &ka);
-	dval(db) = b2d(b, &kb);
-#ifdef Pack_32
-	k = ka - kb + 32*(a->wds - b->wds);
-#else
-	k = ka - kb + 16*(a->wds - b->wds);
-#endif
-#ifdef IBM
-	if (k > 0) {
-		word0(da) += (k >> 2)*Exp_msk1;
-		if (k &= 3)
-			dval(da) *= 1 << k;
-		}
-	else {
-		k = -k;
-		word0(db) += (k >> 2)*Exp_msk1;
-		if (k &= 3)
-			dval(db) *= 1 << k;
-		}
-#else
-	if (k > 0)
-		word0(da) += k*Exp_msk1;
-	else {
-		k = -k;
-		word0(db) += k*Exp_msk1;
-		}
-#endif
-	return dval(da) / dval(db);
-	}
-
- static CONST double
-tens[] = {
-		1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9,
-		1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
-		1e20, 1e21, 1e22
-#ifdef VAX
-		, 1e23, 1e24
-#endif
-		};
-
- static CONST double
-#ifdef IEEE_Arith
-bigtens[] = { 1e16, 1e32, 1e64, 1e128, 1e256 };
-static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128,
-#ifdef Avoid_Underflow
-		9007199254740992.*9007199254740992.e-256
-		/* = 2^106 * 1e-53 */
-#else
-		1e-256
-#endif
-		};
-/* The factor of 2^53 in tinytens[4] helps us avoid setting the underflow */
-/* flag unnecessarily.  It leads to a song and dance at the end of strtod. */
-#define Scale_Bit 0x10
-#define n_bigtens 5
-#else
-#ifdef IBM
-bigtens[] = { 1e16, 1e32, 1e64 };
-static CONST double tinytens[] = { 1e-16, 1e-32, 1e-64 };
-#define n_bigtens 3
-#else
-bigtens[] = { 1e16, 1e32 };
-static CONST double tinytens[] = { 1e-16, 1e-32 };
-#define n_bigtens 2
-#endif
-#endif
-
-#ifndef IEEE_Arith
-#undef INFNAN_CHECK
-#endif
-
-#ifdef INFNAN_CHECK
-
-#ifndef NAN_WORD0
-#define NAN_WORD0 0x7ff80000
-#endif
-
-#ifndef NAN_WORD1
-#define NAN_WORD1 0
-#endif
-
- static int
-match
-#ifdef KR_headers
-	(sp, t) char **sp, *t;
-#else
-	(CONST char **sp, char *t)
-#endif
-{
-	int c, d;
-	CONST char *s = *sp;
-
-	while(d = *t++) {
-		if ((c = *++s) >= 'A' && c <= 'Z')
-			c += 'a' - 'A';
-		if (c != d)
-			return 0;
-		}
-	*sp = s + 1;
-	return 1;
-	}
-
-#ifndef No_Hex_NaN
- static void
-hexnan
-#ifdef KR_headers
-	(rvp, sp) double *rvp; CONST char **sp;
-#else
-	(double *rvp, CONST char **sp)
-#endif
-{
-	ULong c, x[2];
-	CONST char *s;
-	int havedig, udx0, xshift;
-
-	x[0] = x[1] = 0;
-	havedig = xshift = 0;
-	udx0 = 1;
-	s = *sp;
-	while(c = *(CONST unsigned char*)++s) {
-		if (c >= '0' && c <= '9')
-			c -= '0';
-		else if (c >= 'a' && c <= 'f')
-			c += 10 - 'a';
-		else if (c >= 'A' && c <= 'F')
-			c += 10 - 'A';
-		else if (c <= ' ') {
-			if (udx0 && havedig) {
-				udx0 = 0;
-				xshift = 1;
-				}
-			continue;
-			}
-		else if (/*(*/ c == ')' && havedig) {
-			*sp = s + 1;
-			break;
-			}
-		else
-			return;	/* invalid form: don't change *sp */
-		havedig = 1;
-		if (xshift) {
-			xshift = 0;
-			x[0] = x[1];
-			x[1] = 0;
-			}
-		if (udx0)
-			x[0] = (x[0] << 4) | (x[1] >> 28);
-		x[1] = (x[1] << 4) | c;
-		}
-	if ((x[0] &= 0xfffff) || x[1]) {
-		word0(*rvp) = Exp_mask | x[0];
-		word1(*rvp) = x[1];
-		}
-	}
-#endif /*No_Hex_NaN*/
-#endif /* INFNAN_CHECK */
-
- PR_IMPLEMENT(double)
-PR_strtod
-#ifdef KR_headers
-	(s00, se) CONST char *s00; char **se;
-#else
-	(CONST char *s00, char **se)
-#endif
-{
-#ifdef Avoid_Underflow
-	int scale;
-#endif
-	int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, dsign,
-		 e, e1, esign, i, j, k, nd, nd0, nf, nz, nz0, sign;
-	CONST char *s, *s0, *s1;
-	double aadj, aadj1, adj;
-	U aadj2, rv, rv0;
-	Long L;
-	ULong y, z;
-	Bigint *bb, *bb1, *bd, *bd0, *bs, *delta;
-#ifdef SET_INEXACT
-	int inexact, oldinexact;
-#endif
-#ifdef Honor_FLT_ROUNDS
-	int rounding;
-#endif
-#ifdef USE_LOCALE
-	CONST char *s2;
-#endif
-
-	if (!_pr_initialized) _PR_ImplicitInitialization();
-
-	sign = nz0 = nz = 0;
-	dval(rv) = 0.;
-	for(s = s00;;s++) switch(*s) {
-		case '-':
-			sign = 1;
-			/* no break */
-		case '+':
-			if (*++s)
-				goto break2;
-			/* no break */
-		case 0:
-			goto ret0;
-		case '\t':
-		case '\n':
-		case '\v':
-		case '\f':
-		case '\r':
-		case ' ':
-			continue;
-		default:
-			goto break2;
-		}
- break2:
-	if (*s == '0') {
-		nz0 = 1;
-		while(*++s == '0') ;
-		if (!*s)
-			goto ret;
-		}
-	s0 = s;
-	y = z = 0;
-	for(nd = nf = 0; (c = *s) >= '0' && c <= '9'; nd++, s++)
-		if (nd < 9)
-			y = 10*y + c - '0';
-		else if (nd < 16)
-			z = 10*z + c - '0';
-	nd0 = nd;
-#ifdef USE_LOCALE
-	s1 = localeconv()->decimal_point;
-	if (c == *s1) {
-		c = '.';
-		if (*++s1) {
-			s2 = s;
-			for(;;) {
-				if (*++s2 != *s1) {
-					c = 0;
-					break;
-					}
-				if (!*++s1) {
-					s = s2;
-					break;
-					}
-				}
-			}
-		}
-#endif
-	if (c == '.') {
-		c = *++s;
-		if (!nd) {
-			for(; c == '0'; c = *++s)
-				nz++;
-			if (c > '0' && c <= '9') {
-				s0 = s;
-				nf += nz;
-				nz = 0;
-				goto have_dig;
-				}
-			goto dig_done;
-			}
-		for(; c >= '0' && c <= '9'; c = *++s) {
- have_dig:
-			nz++;
-			if (c -= '0') {
-				nf += nz;
-				for(i = 1; i < nz; i++)
-					if (nd++ < 9)
-						y *= 10;
-					else if (nd <= DBL_DIG + 1)
-						z *= 10;
-				if (nd++ < 9)
-					y = 10*y + c;
-				else if (nd <= DBL_DIG + 1)
-					z = 10*z + c;
-				nz = 0;
-				}
-			}
-		}
- dig_done:
-	if (nd > 64 * 1024)
-		goto ret0;
-	e = 0;
-	if (c == 'e' || c == 'E') {
-		if (!nd && !nz && !nz0) {
-			goto ret0;
-			}
-		s00 = s;
-		esign = 0;
-		switch(c = *++s) {
-			case '-':
-				esign = 1;
-			case '+':
-				c = *++s;
-			}
-		if (c >= '0' && c <= '9') {
-			while(c == '0')
-				c = *++s;
-			if (c > '0' && c <= '9') {
-				L = c - '0';
-				s1 = s;
-				while((c = *++s) >= '0' && c <= '9')
-					L = 10*L + c - '0';
-				if (s - s1 > 8 || L > 19999)
-					/* Avoid confusion from exponents
-					 * so large that e might overflow.
-					 */
-					e = 19999; /* safe for 16 bit ints */
-				else
-					e = (int)L;
-				if (esign)
-					e = -e;
-				}
-			else
-				e = 0;
-			}
-		else
-			s = s00;
-		}
-	if (!nd) {
-		if (!nz && !nz0) {
-#ifdef INFNAN_CHECK
-			/* Check for Nan and Infinity */
-			switch(c) {
-			  case 'i':
-			  case 'I':
-				if (match(&s,"nf")) {
-					--s;
-					if (!match(&s,"inity"))
-						++s;
-					word0(rv) = 0x7ff00000;
-					word1(rv) = 0;
-					goto ret;
-					}
-				break;
-			  case 'n':
-			  case 'N':
-				if (match(&s, "an")) {
-					word0(rv) = NAN_WORD0;
-					word1(rv) = NAN_WORD1;
-#ifndef No_Hex_NaN
-					if (*s == '(') /*)*/
-						hexnan(&rv, &s);
-#endif
-					goto ret;
-					}
-			  }
-#endif /* INFNAN_CHECK */
- ret0:
-			s = s00;
-			sign = 0;
-			}
-		goto ret;
-		}
-	e1 = e -= nf;
-
-	/* Now we have nd0 digits, starting at s0, followed by a
-	 * decimal point, followed by nd-nd0 digits.  The number we're
-	 * after is the integer represented by those digits times
-	 * 10**e */
-
-	if (!nd0)
-		nd0 = nd;
-	k = nd < DBL_DIG + 1 ? nd : DBL_DIG + 1;
-	dval(rv) = y;
-	if (k > 9) {
-#ifdef SET_INEXACT
-		if (k > DBL_DIG)
-			oldinexact = get_inexact();
-#endif
-		dval(rv) = tens[k - 9] * dval(rv) + z;
-		}
-	bd0 = 0;
-	if (nd <= DBL_DIG
-#ifndef RND_PRODQUOT
-#ifndef Honor_FLT_ROUNDS
-		&& Flt_Rounds == 1
-#endif
-#endif
-			) {
-		if (!e)
-			goto ret;
-		if (e > 0) {
-			if (e <= Ten_pmax) {
-#ifdef VAX
-				goto vax_ovfl_check;
-#else
-#ifdef Honor_FLT_ROUNDS
-				/* round correctly FLT_ROUNDS = 2 or 3 */
-				if (sign) {
-					rv = -rv;
-					sign = 0;
-					}
-#endif
-				/* rv = */ rounded_product(dval(rv), tens[e]);
-				goto ret;
-#endif
-				}
-			i = DBL_DIG - nd;
-			if (e <= Ten_pmax + i) {
-				/* A fancier test would sometimes let us do
-				 * this for larger i values.
-				 */
-#ifdef Honor_FLT_ROUNDS
-				/* round correctly FLT_ROUNDS = 2 or 3 */
-				if (sign) {
-					rv = -rv;
-					sign = 0;
-					}
-#endif
-				e -= i;
-				dval(rv) *= tens[i];
-#ifdef VAX
-				/* VAX exponent range is so narrow we must
-				 * worry about overflow here...
-				 */
- vax_ovfl_check:
-				word0(rv) -= P*Exp_msk1;
-				/* rv = */ rounded_product(dval(rv), tens[e]);
-				if ((word0(rv) & Exp_mask)
-				 > Exp_msk1*(DBL_MAX_EXP+Bias-1-P))
-					goto ovfl;
-				word0(rv) += P*Exp_msk1;
-#else
-				/* rv = */ rounded_product(dval(rv), tens[e]);
-#endif
-				goto ret;
-				}
-			}
-#ifndef Inaccurate_Divide
-		else if (e >= -Ten_pmax) {
-#ifdef Honor_FLT_ROUNDS
-			/* round correctly FLT_ROUNDS = 2 or 3 */
-			if (sign) {
-				rv = -rv;
-				sign = 0;
-				}
-#endif
-			/* rv = */ rounded_quotient(dval(rv), tens[-e]);
-			goto ret;
-			}
-#endif
-		}
-	e1 += nd - k;
-
-#ifdef IEEE_Arith
-#ifdef SET_INEXACT
-	inexact = 1;
-	if (k <= DBL_DIG)
-		oldinexact = get_inexact();
-#endif
-#ifdef Avoid_Underflow
-	scale = 0;
-#endif
-#ifdef Honor_FLT_ROUNDS
-	if ((rounding = Flt_Rounds) >= 2) {
-		if (sign)
-			rounding = rounding == 2 ? 0 : 2;
-		else
-			if (rounding != 2)
-				rounding = 0;
-		}
-#endif
-#endif /*IEEE_Arith*/
-
-	/* Get starting approximation = rv * 10**e1 */
-
-	if (e1 > 0) {
-		if (i = e1 & 15)
-			dval(rv) *= tens[i];
-		if (e1 &= ~15) {
-			if (e1 > DBL_MAX_10_EXP) {
- ovfl:
-#ifndef NO_ERRNO
-				PR_SetError(PR_RANGE_ERROR, 0);
-#endif
-				/* Can't trust HUGE_VAL */
-#ifdef IEEE_Arith
-#ifdef Honor_FLT_ROUNDS
-				switch(rounding) {
-				  case 0: /* toward 0 */
-				  case 3: /* toward -infinity */
-					word0(rv) = Big0;
-					word1(rv) = Big1;
-					break;
-				  default:
-					word0(rv) = Exp_mask;
-					word1(rv) = 0;
-				  }
-#else /*Honor_FLT_ROUNDS*/
-				word0(rv) = Exp_mask;
-				word1(rv) = 0;
-#endif /*Honor_FLT_ROUNDS*/
-#ifdef SET_INEXACT
-				/* set overflow bit */
-				dval(rv0) = 1e300;
-				dval(rv0) *= dval(rv0);
-#endif
-#else /*IEEE_Arith*/
-				word0(rv) = Big0;
-				word1(rv) = Big1;
-#endif /*IEEE_Arith*/
-				if (bd0)
-					goto retfree;
-				goto ret;
-				}
-			e1 >>= 4;
-			for(j = 0; e1 > 1; j++, e1 >>= 1)
-				if (e1 & 1)
-					dval(rv) *= bigtens[j];
-		/* The last multiplication could overflow. */
-			word0(rv) -= P*Exp_msk1;
-			dval(rv) *= bigtens[j];
-			if ((z = word0(rv) & Exp_mask)
-			 > Exp_msk1*(DBL_MAX_EXP+Bias-P))
-				goto ovfl;
-			if (z > Exp_msk1*(DBL_MAX_EXP+Bias-1-P)) {
-				/* set to largest number */
-				/* (Can't trust DBL_MAX) */
-				word0(rv) = Big0;
-				word1(rv) = Big1;
-				}
-			else
-				word0(rv) += P*Exp_msk1;
-			}
-		}
-	else if (e1 < 0) {
-		e1 = -e1;
-		if (i = e1 & 15)
-			dval(rv) /= tens[i];
-		if (e1 >>= 4) {
-			if (e1 >= 1 << n_bigtens)
-				goto undfl;
-#ifdef Avoid_Underflow
-			if (e1 & Scale_Bit)
-				scale = 2*P;
-			for(j = 0; e1 > 0; j++, e1 >>= 1)
-				if (e1 & 1)
-					dval(rv) *= tinytens[j];
-			if (scale && (j = 2*P + 1 - ((word0(rv) & Exp_mask)
-						>> Exp_shift)) > 0) {
-				/* scaled rv is denormal; zap j low bits */
-				if (j >= 32) {
-					word1(rv) = 0;
-					if (j >= 53)
-					 word0(rv) = (P+2)*Exp_msk1;
-					else
-					 word0(rv) &= 0xffffffff << j-32;
-					}
-				else
-					word1(rv) &= 0xffffffff << j;
-				}
-#else
-			for(j = 0; e1 > 1; j++, e1 >>= 1)
-				if (e1 & 1)
-					dval(rv) *= tinytens[j];
-			/* The last multiplication could underflow. */
-			dval(rv0) = dval(rv);
-			dval(rv) *= tinytens[j];
-			if (!dval(rv)) {
-				dval(rv) = 2.*dval(rv0);
-				dval(rv) *= tinytens[j];
-#endif
-				if (!dval(rv)) {
- undfl:
-					dval(rv) = 0.;
-#ifndef NO_ERRNO
-					PR_SetError(PR_RANGE_ERROR, 0);
-#endif
-					if (bd0)
-						goto retfree;
-					goto ret;
-					}
-#ifndef Avoid_Underflow
-				word0(rv) = Tiny0;
-				word1(rv) = Tiny1;
-				/* The refinement below will clean
-				 * this approximation up.
-				 */
-				}
-#endif
-			}
-		}
-
-	/* Now the hard part -- adjusting rv to the correct value.*/
-
-	/* Put digits into bd: true value = bd * 10^e */
-
-	bd0 = s2b(s0, nd0, nd, y);
-
-	for(;;) {
-		bd = Balloc(bd0->k);
-		Bcopy(bd, bd0);
-		bb = d2b(dval(rv), &bbe, &bbbits);	/* rv = bb * 2^bbe */
-		bs = i2b(1);
-
-		if (e >= 0) {
-			bb2 = bb5 = 0;
-			bd2 = bd5 = e;
-			}
-		else {
-			bb2 = bb5 = -e;
-			bd2 = bd5 = 0;
-			}
-		if (bbe >= 0)
-			bb2 += bbe;
-		else
-			bd2 -= bbe;
-		bs2 = bb2;
-#ifdef Honor_FLT_ROUNDS
-		if (rounding != 1)
-			bs2++;
-#endif
-#ifdef Avoid_Underflow
-		j = bbe - scale;
-		i = j + bbbits - 1;	/* logb(rv) */
-		if (i < Emin)	/* denormal */
-			j += P - Emin;
-		else
-			j = P + 1 - bbbits;
-#else /*Avoid_Underflow*/
-#ifdef Sudden_Underflow
-#ifdef IBM
-		j = 1 + 4*P - 3 - bbbits + ((bbe + bbbits - 1) & 3);
-#else
-		j = P + 1 - bbbits;
-#endif
-#else /*Sudden_Underflow*/
-		j = bbe;
-		i = j + bbbits - 1;	/* logb(rv) */
-		if (i < Emin)	/* denormal */
-			j += P - Emin;
-		else
-			j = P + 1 - bbbits;
-#endif /*Sudden_Underflow*/
-#endif /*Avoid_Underflow*/
-		bb2 += j;
-		bd2 += j;
-#ifdef Avoid_Underflow
-		bd2 += scale;
-#endif
-		i = bb2 < bd2 ? bb2 : bd2;
-		if (i > bs2)
-			i = bs2;
-		if (i > 0) {
-			bb2 -= i;
-			bd2 -= i;
-			bs2 -= i;
-			}
-		if (bb5 > 0) {
-			bs = pow5mult(bs, bb5);
-			bb1 = mult(bs, bb);
-			Bfree(bb);
-			bb = bb1;
-			}
-		if (bb2 > 0)
-			bb = lshift(bb, bb2);
-		if (bd5 > 0)
-			bd = pow5mult(bd, bd5);
-		if (bd2 > 0)
-			bd = lshift(bd, bd2);
-		if (bs2 > 0)
-			bs = lshift(bs, bs2);
-		delta = diff(bb, bd);
-		dsign = delta->sign;
-		delta->sign = 0;
-		i = cmp(delta, bs);
-#ifdef Honor_FLT_ROUNDS
-		if (rounding != 1) {
-			if (i < 0) {
-				/* Error is less than an ulp */
-				if (!delta->x[0] && delta->wds <= 1) {
-					/* exact */
-#ifdef SET_INEXACT
-					inexact = 0;
-#endif
-					break;
-					}
-				if (rounding) {
-					if (dsign) {
-						adj = 1.;
-						goto apply_adj;
-						}
-					}
-				else if (!dsign) {
-					adj = -1.;
-					if (!word1(rv)
-					 && !(word0(rv) & Frac_mask)) {
-						y = word0(rv) & Exp_mask;
-#ifdef Avoid_Underflow
-						if (!scale || y > 2*P*Exp_msk1)
-#else
-						if (y)
-#endif
-						  {
-						  delta = lshift(delta,Log2P);
-						  if (cmp(delta, bs) <= 0)
-							adj = -0.5;
-						  }
-						}
- apply_adj:
-#ifdef Avoid_Underflow
-					if (scale && (y = word0(rv) & Exp_mask)
-						<= 2*P*Exp_msk1)
-					  word0(adj) += (2*P+1)*Exp_msk1 - y;
-#else
-#ifdef Sudden_Underflow
-					if ((word0(rv) & Exp_mask) <=
-							P*Exp_msk1) {
-						word0(rv) += P*Exp_msk1;
-						dval(rv) += adj*ulp(dval(rv));
-						word0(rv) -= P*Exp_msk1;
-						}
-					else
-#endif /*Sudden_Underflow*/
-#endif /*Avoid_Underflow*/
-					dval(rv) += adj*ulp(dval(rv));
-					}
-				break;
-				}
-			adj = ratio(delta, bs);
-			if (adj < 1.)
-				adj = 1.;
-			if (adj <= 0x7ffffffe) {
-				/* adj = rounding ? ceil(adj) : floor(adj); */
-				y = adj;
-				if (y != adj) {
-					if (!((rounding>>1) ^ dsign))
-						y++;
-					adj = y;
-					}
-				}
-#ifdef Avoid_Underflow
-			if (scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1)
-				word0(adj) += (2*P+1)*Exp_msk1 - y;
-#else
-#ifdef Sudden_Underflow
-			if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
-				word0(rv) += P*Exp_msk1;
-				adj *= ulp(dval(rv));
-				if (dsign)
-					dval(rv) += adj;
-				else
-					dval(rv) -= adj;
-				word0(rv) -= P*Exp_msk1;
-				goto cont;
-				}
-#endif /*Sudden_Underflow*/
-#endif /*Avoid_Underflow*/
-			adj *= ulp(dval(rv));
-			if (dsign)
-				dval(rv) += adj;
-			else
-				dval(rv) -= adj;
-			goto cont;
-			}
-#endif /*Honor_FLT_ROUNDS*/
-
-		if (i < 0) {
-			/* Error is less than half an ulp -- check for
-			 * special case of mantissa a power of two.
-			 */
-			if (dsign || word1(rv) || word0(rv) & Bndry_mask
-#ifdef IEEE_Arith
-#ifdef Avoid_Underflow
-			 || (word0(rv) & Exp_mask) <= (2*P+1)*Exp_msk1
-#else
-			 || (word0(rv) & Exp_mask) <= Exp_msk1
-#endif
-#endif
-				) {
-#ifdef SET_INEXACT
-				if (!delta->x[0] && delta->wds <= 1)
-					inexact = 0;
-#endif
-				break;
-				}
-			if (!delta->x[0] && delta->wds <= 1) {
-				/* exact result */
-#ifdef SET_INEXACT
-				inexact = 0;
-#endif
-				break;
-				}
-			delta = lshift(delta,Log2P);
-			if (cmp(delta, bs) > 0)
-				goto drop_down;
-			break;
-			}
-		if (i == 0) {
-			/* exactly half-way between */
-			if (dsign) {
-				if ((word0(rv) & Bndry_mask1) == Bndry_mask1
-				 &&  word1(rv) == (
-#ifdef Avoid_Underflow
-			(scale && (y = word0(rv) & Exp_mask) <= 2*P*Exp_msk1)
-		? (0xffffffff & (0xffffffff << (2*P+1-(y>>Exp_shift)))) :
-#endif
-						   0xffffffff)) {
-					/*boundary case -- increment exponent*/
-					word0(rv) = (word0(rv) & Exp_mask)
-						+ Exp_msk1
-#ifdef IBM
-						| Exp_msk1 >> 4
-#endif
-						;
-					word1(rv) = 0;
-#ifdef Avoid_Underflow
-					dsign = 0;
-#endif
-					break;
-					}
-				}
-			else if (!(word0(rv) & Bndry_mask) && !word1(rv)) {
- drop_down:
-				/* boundary case -- decrement exponent */
-#ifdef Sudden_Underflow /*{{*/
-				L = word0(rv) & Exp_mask;
-#ifdef IBM
-				if (L <  Exp_msk1)
-#else
-#ifdef Avoid_Underflow
-				if (L <= (scale ? (2*P+1)*Exp_msk1 : Exp_msk1))
-#else
-				if (L <= Exp_msk1)
-#endif /*Avoid_Underflow*/
-#endif /*IBM*/
-					goto undfl;
-				L -= Exp_msk1;
-#else /*Sudden_Underflow}{*/
-#ifdef Avoid_Underflow
-				if (scale) {
-					L = word0(rv) & Exp_mask;
-					if (L <= (2*P+1)*Exp_msk1) {
-						if (L > (P+2)*Exp_msk1)
-							/* round even ==> */
-							/* accept rv */
-							break;
-						/* rv = smallest denormal */
-						goto undfl;
-						}
-					}
-#endif /*Avoid_Underflow*/
-				L = (word0(rv) & Exp_mask) - Exp_msk1;
-#endif /*Sudden_Underflow}}*/
-				word0(rv) = L | Bndry_mask1;
-				word1(rv) = 0xffffffff;
-#ifdef IBM
-				goto cont;
-#else
-				break;
-#endif
-				}
-#ifndef ROUND_BIASED
-			if (!(word1(rv) & LSB))
-				break;
-#endif
-			if (dsign)
-				dval(rv) += ulp(dval(rv));
-#ifndef ROUND_BIASED
-			else {
-				dval(rv) -= ulp(dval(rv));
-#ifndef Sudden_Underflow
-				if (!dval(rv))
-					goto undfl;
-#endif
-				}
-#ifdef Avoid_Underflow
-			dsign = 1 - dsign;
-#endif
-#endif
-			break;
-			}
-		if ((aadj = ratio(delta, bs)) <= 2.) {
-			if (dsign)
-				aadj = aadj1 = 1.;
-			else if (word1(rv) || word0(rv) & Bndry_mask) {
-#ifndef Sudden_Underflow
-				if (word1(rv) == Tiny1 && !word0(rv))
-					goto undfl;
-#endif
-				aadj = 1.;
-				aadj1 = -1.;
-				}
-			else {
-				/* special case -- power of FLT_RADIX to be */
-				/* rounded down... */
-
-				if (aadj < 2./FLT_RADIX)
-					aadj = 1./FLT_RADIX;
-				else
-					aadj *= 0.5;
-				aadj1 = -aadj;
-				}
-			}
-		else {
-			aadj *= 0.5;
-			aadj1 = dsign ? aadj : -aadj;
-#ifdef Check_FLT_ROUNDS
-			switch(Rounding) {
-				case 2: /* towards +infinity */
-					aadj1 -= 0.5;
-					break;
-				case 0: /* towards 0 */
-				case 3: /* towards -infinity */
-					aadj1 += 0.5;
-				}
-#else
-			if (Flt_Rounds == 0)
-				aadj1 += 0.5;
-#endif /*Check_FLT_ROUNDS*/
-			}
-		y = word0(rv) & Exp_mask;
-
-		/* Check for overflow */
-
-		if (y == Exp_msk1*(DBL_MAX_EXP+Bias-1)) {
-			dval(rv0) = dval(rv);
-			word0(rv) -= P*Exp_msk1;
-			adj = aadj1 * ulp(dval(rv));
-			dval(rv) += adj;
-			if ((word0(rv) & Exp_mask) >=
-					Exp_msk1*(DBL_MAX_EXP+Bias-P)) {
-				if (word0(rv0) == Big0 && word1(rv0) == Big1)
-					goto ovfl;
-				word0(rv) = Big0;
-				word1(rv) = Big1;
-				goto cont;
-				}
-			else
-				word0(rv) += P*Exp_msk1;
-			}
-		else {
-#ifdef Avoid_Underflow
-			if (scale && y <= 2*P*Exp_msk1) {
-				if (aadj <= 0x7fffffff) {
-					if ((z = aadj) <= 0)
-						z = 1;
-					aadj = z;
-					aadj1 = dsign ? aadj : -aadj;
-					}
-				dval(aadj2) = aadj1;
-				word0(aadj2) += (2*P+1)*Exp_msk1 - y;
-				aadj1 = dval(aadj2);
-				}
-			adj = aadj1 * ulp(dval(rv));
-			dval(rv) += adj;
-#else
-#ifdef Sudden_Underflow
-			if ((word0(rv) & Exp_mask) <= P*Exp_msk1) {
-				dval(rv0) = dval(rv);
-				word0(rv) += P*Exp_msk1;
-				adj = aadj1 * ulp(dval(rv));
-				dval(rv) += adj;
-#ifdef IBM
-				if ((word0(rv) & Exp_mask) <  P*Exp_msk1)
-#else
-				if ((word0(rv) & Exp_mask) <= P*Exp_msk1)
-#endif
-					{
-					if (word0(rv0) == Tiny0
-					 && word1(rv0) == Tiny1)
-						goto undfl;
-					word0(rv) = Tiny0;
-					word1(rv) = Tiny1;
-					goto cont;
-					}
-				else
-					word0(rv) -= P*Exp_msk1;
-				}
-			else {
-				adj = aadj1 * ulp(dval(rv));
-				dval(rv) += adj;
-				}
-#else /*Sudden_Underflow*/
-			/* Compute adj so that the IEEE rounding rules will
-			 * correctly round rv + adj in some half-way cases.
-			 * If rv * ulp(rv) is denormalized (i.e.,
-			 * y <= (P-1)*Exp_msk1), we must adjust aadj to avoid
-			 * trouble from bits lost to denormalization;
-			 * example: 1.2e-307 .
-			 */
-			if (y <= (P-1)*Exp_msk1 && aadj > 1.) {
-				aadj1 = (double)(int)(aadj + 0.5);
-				if (!dsign)
-					aadj1 = -aadj1;
-				}
-			adj = aadj1 * ulp(dval(rv));
-			dval(rv) += adj;
-#endif /*Sudden_Underflow*/
-#endif /*Avoid_Underflow*/
-			}
-		z = word0(rv) & Exp_mask;
-#ifndef SET_INEXACT
-#ifdef Avoid_Underflow
-		if (!scale)
-#endif
-		if (y == z) {
-			/* Can we stop now? */
-			L = (Long)aadj;
-			aadj -= L;
-			/* The tolerances below are conservative. */
-			if (dsign || word1(rv) || word0(rv) & Bndry_mask) {
-				if (aadj < .4999999 || aadj > .5000001)
-					break;
-				}
-			else if (aadj < .4999999/FLT_RADIX)
-				break;
-			}
-#endif
- cont:
-		Bfree(bb);
-		Bfree(bd);
-		Bfree(bs);
-		Bfree(delta);
-		}
-#ifdef SET_INEXACT
-	if (inexact) {
-		if (!oldinexact) {
-			word0(rv0) = Exp_1 + (70 << Exp_shift);
-			word1(rv0) = 0;
-			dval(rv0) += 1.;
-			}
-		}
-	else if (!oldinexact)
-		clear_inexact();
-#endif
-#ifdef Avoid_Underflow
-	if (scale) {
-		word0(rv0) = Exp_1 - 2*P*Exp_msk1;
-		word1(rv0) = 0;
-		dval(rv) *= dval(rv0);
-#ifndef NO_ERRNO
-		/* try to avoid the bug of testing an 8087 register value */
-		if (word0(rv) == 0 && word1(rv) == 0)
-			PR_SetError(PR_RANGE_ERROR, 0);
-#endif
-		}
-#endif /* Avoid_Underflow */
-#ifdef SET_INEXACT
-	if (inexact && !(word0(rv) & Exp_mask)) {
-		/* set underflow bit */
-		dval(rv0) = 1e-300;
-		dval(rv0) *= dval(rv0);
-		}
-#endif
- retfree:
-	Bfree(bb);
-	Bfree(bd);
-	Bfree(bs);
-	Bfree(bd0);
-	Bfree(delta);
- ret:
-	if (se)
-		*se = (char *)s;
-	return sign ? -dval(rv) : dval(rv);
-	}
-
- static int
-quorem
-#ifdef KR_headers
-	(b, S) Bigint *b, *S;
-#else
-	(Bigint *b, Bigint *S)
-#endif
-{
-	int n;
-	ULong *bx, *bxe, q, *sx, *sxe;
-#ifdef ULLong
-	ULLong borrow, carry, y, ys;
-#else
-	ULong borrow, carry, y, ys;
-#ifdef Pack_32
-	ULong si, z, zs;
-#endif
-#endif
-
-	n = S->wds;
-#ifdef DEBUG
-	/*debug*/ if (b->wds > n)
-	/*debug*/	Bug("oversize b in quorem");
-#endif
-	if (b->wds < n)
-		return 0;
-	sx = S->x;
-	sxe = sx + --n;
-	bx = b->x;
-	bxe = bx + n;
-	q = *bxe / (*sxe + 1);	/* ensure q <= true quotient */
-#ifdef DEBUG
-	/*debug*/ if (q > 9)
-	/*debug*/	Bug("oversized quotient in quorem");
-#endif
-	if (q) {
-		borrow = 0;
-		carry = 0;
-		do {
-#ifdef ULLong
-			ys = *sx++ * (ULLong)q + carry;
-			carry = ys >> 32;
-			y = *bx - (ys & FFFFFFFF) - borrow;
-			borrow = y >> 32 & (ULong)1;
-			*bx++ = y & FFFFFFFF;
-#else
-#ifdef Pack_32
-			si = *sx++;
-			ys = (si & 0xffff) * q + carry;
-			zs = (si >> 16) * q + (ys >> 16);
-			carry = zs >> 16;
-			y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
-			borrow = (y & 0x10000) >> 16;
-			z = (*bx >> 16) - (zs & 0xffff) - borrow;
-			borrow = (z & 0x10000) >> 16;
-			Storeinc(bx, z, y);
-#else
-			ys = *sx++ * q + carry;
-			carry = ys >> 16;
-			y = *bx - (ys & 0xffff) - borrow;
-			borrow = (y & 0x10000) >> 16;
-			*bx++ = y & 0xffff;
-#endif
-#endif
-			}
-			while(sx <= sxe);
-		if (!*bxe) {
-			bx = b->x;
-			while(--bxe > bx && !*bxe)
-				--n;
-			b->wds = n;
-			}
-		}
-	if (cmp(b, S) >= 0) {
-		q++;
-		borrow = 0;
-		carry = 0;
-		bx = b->x;
-		sx = S->x;
-		do {
-#ifdef ULLong
-			ys = *sx++ + carry;
-			carry = ys >> 32;
-			y = *bx - (ys & FFFFFFFF) - borrow;
-			borrow = y >> 32 & (ULong)1;
-			*bx++ = y & FFFFFFFF;
-#else
-#ifdef Pack_32
-			si = *sx++;
-			ys = (si & 0xffff) + carry;
-			zs = (si >> 16) + (ys >> 16);
-			carry = zs >> 16;
-			y = (*bx & 0xffff) - (ys & 0xffff) - borrow;
-			borrow = (y & 0x10000) >> 16;
-			z = (*bx >> 16) - (zs & 0xffff) - borrow;
-			borrow = (z & 0x10000) >> 16;
-			Storeinc(bx, z, y);
-#else
-			ys = *sx++ + carry;
-			carry = ys >> 16;
-			y = *bx - (ys & 0xffff) - borrow;
-			borrow = (y & 0x10000) >> 16;
-			*bx++ = y & 0xffff;
-#endif
-#endif
-			}
-			while(sx <= sxe);
-		bx = b->x;
-		bxe = bx + n;
-		if (!*bxe) {
-			while(--bxe > bx && !*bxe)
-				--n;
-			b->wds = n;
-			}
-		}
-	return q;
-	}
-
-#ifndef MULTIPLE_THREADS
- static char *dtoa_result;
-#endif
-
- static char *
-#ifdef KR_headers
-rv_alloc(i) int i;
-#else
-rv_alloc(int i)
-#endif
-{
-	int j, k, *r;
-
-	j = sizeof(ULong);
-	for(k = 0;
-		sizeof(Bigint) - sizeof(ULong) - sizeof(int) + j <= i;
-		j <<= 1)
-			k++;
-	r = (int*)Balloc(k);
-	*r = k;
-	return
-#ifndef MULTIPLE_THREADS
-	dtoa_result =
-#endif
-		(char *)(r+1);
-	}
-
- static char *
-#ifdef KR_headers
-nrv_alloc(s, rve, n) char *s, **rve; int n;
-#else
-nrv_alloc(char *s, char **rve, int n)
-#endif
-{
-	char *rv, *t;
-
-	t = rv = rv_alloc(n);
-	while(*t = *s++) t++;
-	if (rve)
-		*rve = t;
-	return rv;
-	}
-
-/* freedtoa(s) must be used to free values s returned by dtoa
- * when MULTIPLE_THREADS is #defined.  It should be used in all cases,
- * but for consistency with earlier versions of dtoa, it is optional
- * when MULTIPLE_THREADS is not defined.
- */
-
- static void
-#ifdef KR_headers
-freedtoa(s) char *s;
-#else
-freedtoa(char *s)
-#endif
-{
-	Bigint *b = (Bigint *)((int *)s - 1);
-	b->maxwds = 1 << (b->k = *(int*)b);
-	Bfree(b);
-#ifndef MULTIPLE_THREADS
-	if (s == dtoa_result)
-		dtoa_result = 0;
-#endif
-	}
-
-/* dtoa for IEEE arithmetic (dmg): convert double to ASCII string.
- *
- * Inspired by "How to Print Floating-Point Numbers Accurately" by
- * Guy L. Steele, Jr. and Jon L. White [Proc. ACM SIGPLAN '90, pp. 112-126].
- *
- * Modifications:
- *	1. Rather than iterating, we use a simple numeric overestimate
- *	   to determine k = floor(log10(d)).  We scale relevant
- *	   quantities using O(log2(k)) rather than O(k) multiplications.
- *	2. For some modes > 2 (corresponding to ecvt and fcvt), we don't
- *	   try to generate digits strictly left to right.  Instead, we
- *	   compute with fewer bits and propagate the carry if necessary
- *	   when rounding the final digit up.  This is often faster.
- *	3. Under the assumption that input will be rounded nearest,
- *	   mode 0 renders 1e23 as 1e23 rather than 9.999999999999999e22.
- *	   That is, we allow equality in stopping tests when the
- *	   round-nearest rule will give the same floating-point value
- *	   as would satisfaction of the stopping test with strict
- *	   inequality.
- *	4. We remove common factors of powers of 2 from relevant
- *	   quantities.
- *	5. When converting floating-point integers less than 1e16,
- *	   we use floating-point arithmetic rather than resorting
- *	   to multiple-precision integers.
- *	6. When asked to produce fewer than 15 digits, we first try
- *	   to get by with floating-point arithmetic; we resort to
- *	   multiple-precision integer arithmetic only if we cannot
- *	   guarantee that the floating-point calculation has given
- *	   the correctly rounded result.  For k requested digits and
- *	   "uniformly" distributed input, the probability is
- *	   something like 10^(k-15) that we must resort to the Long
- *	   calculation.
- */
-
- static char *
-dtoa
-#ifdef KR_headers
-	(dd, mode, ndigits, decpt, sign, rve)
-	double dd; int mode, ndigits, *decpt, *sign; char **rve;
-#else
-	(double dd, int mode, int ndigits, int *decpt, int *sign, char **rve)
-#endif
-{
- /*	Arguments ndigits, decpt, sign are similar to those
-	of ecvt and fcvt; trailing zeros are suppressed from
-	the returned string.  If not null, *rve is set to point
-	to the end of the return value.  If d is +-Infinity or NaN,
-	then *decpt is set to 9999.
-
-	mode:
-		0 ==> shortest string that yields d when read in
-			and rounded to nearest.
-		1 ==> like 0, but with Steele & White stopping rule;
-			e.g. with IEEE P754 arithmetic , mode 0 gives
-			1e23 whereas mode 1 gives 9.999999999999999e22.
-		2 ==> max(1,ndigits) significant digits.  This gives a
-			return value similar to that of ecvt, except
-			that trailing zeros are suppressed.
-		3 ==> through ndigits past the decimal point.  This
-			gives a return value similar to that from fcvt,
-			except that trailing zeros are suppressed, and
-			ndigits can be negative.
-		4,5 ==> similar to 2 and 3, respectively, but (in
-			round-nearest mode) with the tests of mode 0 to
-			possibly return a shorter string that rounds to d.
-			With IEEE arithmetic and compilation with
-			-DHonor_FLT_ROUNDS, modes 4 and 5 behave the same
-			as modes 2 and 3 when FLT_ROUNDS != 1.
-		6-9 ==> Debugging modes similar to mode - 4:  don't try
-			fast floating-point estimate (if applicable).
-
-		Values of mode other than 0-9 are treated as mode 0.
-
-		Sufficient space is allocated to the return value
-		to hold the suppressed trailing zeros.
-	*/
-
-	int bbits, b2, b5, be, dig, i, ieps, ilim, ilim0, ilim1,
-		j, j1, k, k0, k_check, leftright, m2, m5, s2, s5,
-		spec_case, try_quick;
-	Long L;
-#ifndef Sudden_Underflow
-	int denorm;
-	ULong x;
-#endif
-	Bigint *b, *b1, *delta, *mlo, *mhi, *S;
-	U d, d2, eps;
-	double ds;
-	char *s, *s0;
-#ifdef Honor_FLT_ROUNDS
-	int rounding;
-#endif
-#ifdef SET_INEXACT
-	int inexact, oldinexact;
-#endif
-
-#ifndef MULTIPLE_THREADS
-	if (dtoa_result) {
-		freedtoa(dtoa_result);
-		dtoa_result = 0;
-		}
-#endif
-
-	dval(d) = dd;
-	if (word0(d) & Sign_bit) {
-		/* set sign for everything, including 0's and NaNs */
-		*sign = 1;
-		word0(d) &= ~Sign_bit;	/* clear sign bit */
-		}
-	else
-		*sign = 0;
-
-#if defined(IEEE_Arith) + defined(VAX)
-#ifdef IEEE_Arith
-	if ((word0(d) & Exp_mask) == Exp_mask)
-#else
-	if (word0(d)  == 0x8000)
-#endif
-		{
-		/* Infinity or NaN */
-		*decpt = 9999;
-#ifdef IEEE_Arith
-		if (!word1(d) && !(word0(d) & 0xfffff))
-			return nrv_alloc("Infinity", rve, 8);
-#endif
-		return nrv_alloc("NaN", rve, 3);
-		}
-#endif
-#ifdef IBM
-	dval(d) += 0; /* normalize */
-#endif
-	if (!dval(d)) {
-		*decpt = 1;
-		return nrv_alloc("0", rve, 1);
-		}
-
-#ifdef SET_INEXACT
-	try_quick = oldinexact = get_inexact();
-	inexact = 1;
-#endif
-#ifdef Honor_FLT_ROUNDS
-	if ((rounding = Flt_Rounds) >= 2) {
-		if (*sign)
-			rounding = rounding == 2 ? 0 : 2;
-		else
-			if (rounding != 2)
-				rounding = 0;
-		}
-#endif
-
-	b = d2b(dval(d), &be, &bbits);
-#ifdef Sudden_Underflow
-	i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1));
-#else
-	if (i = (int)(word0(d) >> Exp_shift1 & (Exp_mask>>Exp_shift1))) {
-#endif
-		dval(d2) = dval(d);
-		word0(d2) &= Frac_mask1;
-		word0(d2) |= Exp_11;
-#ifdef IBM
-		if (j = 11 - hi0bits(word0(d2) & Frac_mask))
-			dval(d2) /= 1 << j;
-#endif
-
-		/* log(x)	~=~ log(1.5) + (x-1.5)/1.5
-		 * log10(x)	 =  log(x) / log(10)
-		 *		~=~ log(1.5)/log(10) + (x-1.5)/(1.5*log(10))
-		 * log10(d) = (i-Bias)*log(2)/log(10) + log10(d2)
-		 *
-		 * This suggests computing an approximation k to log10(d) by
-		 *
-		 * k = (i - Bias)*0.301029995663981
-		 *	+ ( (d2-1.5)*0.289529654602168 + 0.176091259055681 );
-		 *
-		 * We want k to be too large rather than too small.
-		 * The error in the first-order Taylor series approximation
-		 * is in our favor, so we just round up the constant enough
-		 * to compensate for any error in the multiplication of
-		 * (i - Bias) by 0.301029995663981; since |i - Bias| <= 1077,
-		 * and 1077 * 0.30103 * 2^-52 ~=~ 7.2e-14,
-		 * adding 1e-13 to the constant term more than suffices.
-		 * Hence we adjust the constant term to 0.1760912590558.
-		 * (We could get a more accurate k by invoking log10,
-		 *  but this is probably not worthwhile.)
-		 */
-
-		i -= Bias;
-#ifdef IBM
-		i <<= 2;
-		i += j;
-#endif
-#ifndef Sudden_Underflow
-		denorm = 0;
-		}
-	else {
-		/* d is denormalized */
-
-		i = bbits + be + (Bias + (P-1) - 1);
-		x = i > 32  ? word0(d) << 64 - i | word1(d) >> i - 32
-			    : word1(d) << 32 - i;
-		dval(d2) = x;
-		word0(d2) -= 31*Exp_msk1; /* adjust exponent */
-		i -= (Bias + (P-1) - 1) + 1;
-		denorm = 1;
-		}
-#endif
-	ds = (dval(d2)-1.5)*0.289529654602168 + 0.1760912590558 + i*0.301029995663981;
-	k = (int)ds;
-	if (ds < 0. && ds != k)
-		k--;	/* want k = floor(ds) */
-	k_check = 1;
-	if (k >= 0 && k <= Ten_pmax) {
-		if (dval(d) < tens[k])
-			k--;
-		k_check = 0;
-		}
-	j = bbits - i - 1;
-	if (j >= 0) {
-		b2 = 0;
-		s2 = j;
-		}
-	else {
-		b2 = -j;
-		s2 = 0;
-		}
-	if (k >= 0) {
-		b5 = 0;
-		s5 = k;
-		s2 += k;
-		}
-	else {
-		b2 -= k;
-		b5 = -k;
-		s5 = 0;
-		}
-	if (mode < 0 || mode > 9)
-		mode = 0;
-
-#ifndef SET_INEXACT
-#ifdef Check_FLT_ROUNDS
-	try_quick = Rounding == 1;
-#else
-	try_quick = 1;
-#endif
-#endif /*SET_INEXACT*/
-
-	if (mode > 5) {
-		mode -= 4;
-		try_quick = 0;
-		}
-	leftright = 1;
-	switch(mode) {
-		case 0:
-		case 1:
-			ilim = ilim1 = -1;
-			i = 18;
-			ndigits = 0;
-			break;
-		case 2:
-			leftright = 0;
-			/* no break */
-		case 4:
-			if (ndigits <= 0)
-				ndigits = 1;
-			ilim = ilim1 = i = ndigits;
-			break;
-		case 3:
-			leftright = 0;
-			/* no break */
-		case 5:
-			i = ndigits + k + 1;
-			ilim = i;
-			ilim1 = i - 1;
-			if (i <= 0)
-				i = 1;
-		}
-	s = s0 = rv_alloc(i);
-
-#ifdef Honor_FLT_ROUNDS
-	if (mode > 1 && rounding != 1)
-		leftright = 0;
-#endif
-
-	if (ilim >= 0 && ilim <= Quick_max && try_quick) {
-
-		/* Try to get by with floating-point arithmetic. */
-
-		i = 0;
-		dval(d2) = dval(d);
-		k0 = k;
-		ilim0 = ilim;
-		ieps = 2; /* conservative */
-		if (k > 0) {
-			ds = tens[k&0xf];
-			j = k >> 4;
-			if (j & Bletch) {
-				/* prevent overflows */
-				j &= Bletch - 1;
-				dval(d) /= bigtens[n_bigtens-1];
-				ieps++;
-				}
-			for(; j; j >>= 1, i++)
-				if (j & 1) {
-					ieps++;
-					ds *= bigtens[i];
-					}
-			dval(d) /= ds;
-			}
-		else if (j1 = -k) {
-			dval(d) *= tens[j1 & 0xf];
-			for(j = j1 >> 4; j; j >>= 1, i++)
-				if (j & 1) {
-					ieps++;
-					dval(d) *= bigtens[i];
-					}
-			}
-		if (k_check && dval(d) < 1. && ilim > 0) {
-			if (ilim1 <= 0)
-				goto fast_failed;
-			ilim = ilim1;
-			k--;
-			dval(d) *= 10.;
-			ieps++;
-			}
-		dval(eps) = ieps*dval(d) + 7.;
-		word0(eps) -= (P-1)*Exp_msk1;
-		if (ilim == 0) {
-			S = mhi = 0;
-			dval(d) -= 5.;
-			if (dval(d) > dval(eps))
-				goto one_digit;
-			if (dval(d) < -dval(eps))
-				goto no_digits;
-			goto fast_failed;
-			}
-#ifndef No_leftright
-		if (leftright) {
-			/* Use Steele & White method of only
-			 * generating digits needed.
-			 */
-			dval(eps) = 0.5/tens[ilim-1] - dval(eps);
-			for(i = 0;;) {
-				L = dval(d);
-				dval(d) -= L;
-				*s++ = '0' + (int)L;
-				if (dval(d) < dval(eps))
-					goto ret1;
-				if (1. - dval(d) < dval(eps))
-					goto bump_up;
-				if (++i >= ilim)
-					break;
-				dval(eps) *= 10.;
-				dval(d) *= 10.;
-				}
-			}
-		else {
-#endif
-			/* Generate ilim digits, then fix them up. */
-			dval(eps) *= tens[ilim-1];
-			for(i = 1;; i++, dval(d) *= 10.) {
-				L = (Long)(dval(d));
-				if (!(dval(d) -= L))
-					ilim = i;
-				*s++ = '0' + (int)L;
-				if (i == ilim) {
-					if (dval(d) > 0.5 + dval(eps))
-						goto bump_up;
-					else if (dval(d) < 0.5 - dval(eps)) {
-						while(*--s == '0');
-						s++;
-						goto ret1;
-						}
-					break;
-					}
-				}
-#ifndef No_leftright
-			}
-#endif
- fast_failed:
-		s = s0;
-		dval(d) = dval(d2);
-		k = k0;
-		ilim = ilim0;
-		}
-
-	/* Do we have a "small" integer? */
-
-	if (be >= 0 && k <= Int_max) {
-		/* Yes. */
-		ds = tens[k];
-		if (ndigits < 0 && ilim <= 0) {
-			S = mhi = 0;
-			if (ilim < 0 || dval(d) <= 5*ds)
-				goto no_digits;
-			goto one_digit;
-			}
-		for(i = 1; i <= k+1; i++, dval(d) *= 10.) {
-			L = (Long)(dval(d) / ds);
-			dval(d) -= L*ds;
-#ifdef Check_FLT_ROUNDS
-			/* If FLT_ROUNDS == 2, L will usually be high by 1 */
-			if (dval(d) < 0) {
-				L--;
-				dval(d) += ds;
-				}
-#endif
-			*s++ = '0' + (int)L;
-			if (!dval(d)) {
-#ifdef SET_INEXACT
-				inexact = 0;
-#endif
-				break;
-				}
-			if (i == ilim) {
-#ifdef Honor_FLT_ROUNDS
-				if (mode > 1)
-				switch(rounding) {
-				  case 0: goto ret1;
-				  case 2: goto bump_up;
-				  }
-#endif
-				dval(d) += dval(d);
-				if (dval(d) > ds || dval(d) == ds && L & 1) {
- bump_up:
-					while(*--s == '9')
-						if (s == s0) {
-							k++;
-							*s = '0';
-							break;
-							}
-					++*s++;
-					}
-				break;
-				}
-			}
-		goto ret1;
-		}
-
-	m2 = b2;
-	m5 = b5;
-	mhi = mlo = 0;
-	if (leftright) {
-		i =
-#ifndef Sudden_Underflow
-			denorm ? be + (Bias + (P-1) - 1 + 1) :
-#endif
-#ifdef IBM
-			1 + 4*P - 3 - bbits + ((bbits + be - 1) & 3);
-#else
-			1 + P - bbits;
-#endif
-		b2 += i;
-		s2 += i;
-		mhi = i2b(1);
-		}
-	if (m2 > 0 && s2 > 0) {
-		i = m2 < s2 ? m2 : s2;
-		b2 -= i;
-		m2 -= i;
-		s2 -= i;
-		}
-	if (b5 > 0) {
-		if (leftright) {
-			if (m5 > 0) {
-				mhi = pow5mult(mhi, m5);
-				b1 = mult(mhi, b);
-				Bfree(b);
-				b = b1;
-				}
-			if (j = b5 - m5)
-				b = pow5mult(b, j);
-			}
-		else
-			b = pow5mult(b, b5);
-		}
-	S = i2b(1);
-	if (s5 > 0)
-		S = pow5mult(S, s5);
-
-	/* Check for special case that d is a normalized power of 2. */
-
-	spec_case = 0;
-	if ((mode < 2 || leftright)
-#ifdef Honor_FLT_ROUNDS
-			&& rounding == 1
-#endif
-				) {
-		if (!word1(d) && !(word0(d) & Bndry_mask)
-#ifndef Sudden_Underflow
-		 && word0(d) & (Exp_mask & ~Exp_msk1)
-#endif
-				) {
-			/* The special case */
-			b2 += Log2P;
-			s2 += Log2P;
-			spec_case = 1;
-			}
-		}
-
-	/* Arrange for convenient computation of quotients:
-	 * shift left if necessary so divisor has 4 leading 0 bits.
-	 *
-	 * Perhaps we should just compute leading 28 bits of S once
-	 * and for all and pass them and a shift to quorem, so it
-	 * can do shifts and ors to compute the numerator for q.
-	 */
-#ifdef Pack_32
-	if (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0x1f)
-		i = 32 - i;
-#else
-	if (i = ((s5 ? 32 - hi0bits(S->x[S->wds-1]) : 1) + s2) & 0xf)
-		i = 16 - i;
-#endif
-	if (i > 4) {
-		i -= 4;
-		b2 += i;
-		m2 += i;
-		s2 += i;
-		}
-	else if (i < 4) {
-		i += 28;
-		b2 += i;
-		m2 += i;
-		s2 += i;
-		}
-	if (b2 > 0)
-		b = lshift(b, b2);
-	if (s2 > 0)
-		S = lshift(S, s2);
-	if (k_check) {
-		if (cmp(b,S) < 0) {
-			k--;
-			b = multadd(b, 10, 0);	/* we botched the k estimate */
-			if (leftright)
-				mhi = multadd(mhi, 10, 0);
-			ilim = ilim1;
-			}
-		}
-	if (ilim <= 0 && (mode == 3 || mode == 5)) {
-		if (ilim < 0 || cmp(b,S = multadd(S,5,0)) <= 0) {
-			/* no digits, fcvt style */
- no_digits:
-			k = -1 - ndigits;
-			goto ret;
-			}
- one_digit:
-		*s++ = '1';
-		k++;
-		goto ret;
-		}
-	if (leftright) {
-		if (m2 > 0)
-			mhi = lshift(mhi, m2);
-
-		/* Compute mlo -- check for special case
-		 * that d is a normalized power of 2.
-		 */
-
-		mlo = mhi;
-		if (spec_case) {
-			mhi = Balloc(mhi->k);
-			Bcopy(mhi, mlo);
-			mhi = lshift(mhi, Log2P);
-			}
-
-		for(i = 1;;i++) {
-			dig = quorem(b,S) + '0';
-			/* Do we yet have the shortest decimal string
-			 * that will round to d?
-			 */
-			j = cmp(b, mlo);
-			delta = diff(S, mhi);
-			j1 = delta->sign ? 1 : cmp(b, delta);
-			Bfree(delta);
-#ifndef ROUND_BIASED
-			if (j1 == 0 && mode != 1 && !(word1(d) & 1)
-#ifdef Honor_FLT_ROUNDS
-				&& rounding >= 1
-#endif
-								   ) {
-				if (dig == '9')
-					goto round_9_up;
-				if (j > 0)
-					dig++;
-#ifdef SET_INEXACT
-				else if (!b->x[0] && b->wds <= 1)
-					inexact = 0;
-#endif
-				*s++ = dig;
-				goto ret;
-				}
-#endif
-			if (j < 0 || j == 0 && mode != 1
-#ifndef ROUND_BIASED
-							&& !(word1(d) & 1)
-#endif
-					) {
-				if (!b->x[0] && b->wds <= 1) {
-#ifdef SET_INEXACT
-					inexact = 0;
-#endif
-					goto accept_dig;
-					}
-#ifdef Honor_FLT_ROUNDS
-				if (mode > 1)
-				 switch(rounding) {
-				  case 0: goto accept_dig;
-				  case 2: goto keep_dig;
-				  }
-#endif /*Honor_FLT_ROUNDS*/
-				if (j1 > 0) {
-					b = lshift(b, 1);
-					j1 = cmp(b, S);
-					if ((j1 > 0 || j1 == 0 && dig & 1)
-					&& dig++ == '9')
-						goto round_9_up;
-					}
- accept_dig:
-				*s++ = dig;
-				goto ret;
-				}
-			if (j1 > 0) {
-#ifdef Honor_FLT_ROUNDS
-				if (!rounding)
-					goto accept_dig;
-#endif
-				if (dig == '9') { /* possible if i == 1 */
- round_9_up:
-					*s++ = '9';
-					goto roundoff;
-					}
-				*s++ = dig + 1;
-				goto ret;
-				}
-#ifdef Honor_FLT_ROUNDS
- keep_dig:
-#endif
-			*s++ = dig;
-			if (i == ilim)
-				break;
-			b = multadd(b, 10, 0);
-			if (mlo == mhi)
-				mlo = mhi = multadd(mhi, 10, 0);
-			else {
-				mlo = multadd(mlo, 10, 0);
-				mhi = multadd(mhi, 10, 0);
-				}
-			}
-		}
-	else
-		for(i = 1;; i++) {
-			*s++ = dig = quorem(b,S) + '0';
-			if (!b->x[0] && b->wds <= 1) {
-#ifdef SET_INEXACT
-				inexact = 0;
-#endif
-				goto ret;
-				}
-			if (i >= ilim)
-				break;
-			b = multadd(b, 10, 0);
-			}
-
-	/* Round off last digit */
-
-#ifdef Honor_FLT_ROUNDS
-	switch(rounding) {
-	  case 0: goto trimzeros;
-	  case 2: goto roundoff;
-	  }
-#endif
-	b = lshift(b, 1);
-	j = cmp(b, S);
-	if (j > 0 || j == 0 && dig & 1) {
- roundoff:
-		while(*--s == '9')
-			if (s == s0) {
-				k++;
-				*s++ = '1';
-				goto ret;
-				}
-		++*s++;
-		}
-	else {
-#ifdef Honor_FLT_ROUNDS
- trimzeros:
-#endif
-		while(*--s == '0');
-		s++;
-		}
- ret:
-	Bfree(S);
-	if (mhi) {
-		if (mlo && mlo != mhi)
-			Bfree(mlo);
-		Bfree(mhi);
-		}
- ret1:
-#ifdef SET_INEXACT
-	if (inexact) {
-		if (!oldinexact) {
-			word0(d) = Exp_1 + (70 << Exp_shift);
-			word1(d) = 0;
-			dval(d) += 1.;
-			}
-		}
-	else if (!oldinexact)
-		clear_inexact();
-#endif
-	Bfree(b);
-	*s = 0;
-	*decpt = k + 1;
-	if (rve)
-		*rve = s;
-	return s0;
-	}
-#ifdef __cplusplus
+    if (!_pr_initialized) _PR_ImplicitInitialization();
+    return (strtod(s00, se));
 }
-#endif
 
 PR_IMPLEMENT(PRStatus)
 PR_dtoa(PRFloat64 d, PRIntn mode, PRIntn ndigits,
@@ -3408,7 +134,7 @@ PR_dtoa(PRFloat64 d, PRIntn mode, PRIntn ndigits,
         PR_SetError(PR_INVALID_ARGUMENT_ERROR, 0);
         return rv;
     }
-    result = dtoa(d, mode, ndigits, decpt, sign, rve);
+    result = __dtoa(d, mode, ndigits, decpt, sign, rve);
     if (!result) {
         PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
         return rv;
@@ -3423,7 +149,7 @@ PR_dtoa(PRFloat64 d, PRIntn mode, PRIntn ndigits,
         }
         rv = PR_SUCCESS;
     }
-    freedtoa(result);
+    __freedtoa(result);
     return rv;  
 }
 
@@ -3445,9 +171,9 @@ PR_cnvtf(char *buf, int bufsz, int prcsn, double dfval
     char *num, *nump;
     char *bufp = buf;
     char *endnum;
-    U fval;
+    _double fval;
 
-    dval(fval) = dfval;
+    value(fval) = dfval;
     /* If anything fails, we store an empty string in 'buf' */
     num = (char*)PR_MALLOC(bufsz);
     if (num == NULL) {
@@ -3455,7 +181,7 @@ PR_cnvtf(char *buf, int bufsz, int prcsn, double dfval
         return;
     }
     /* XXX Why use mode 1? */
-    if (PR_dtoa(dval(fval),1,prcsn,&decpt,&sign,&endnum,num,bufsz)
+    if (PR_dtoa(value(fval),1,prcsn,&decpt,&sign,&endnum,num,bufsz)
             == PR_FAILURE) {
         buf[0] = '\0';
         goto done;
