mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-12-15 14:51:13 +00:00
921 lines
15 KiB
C
921 lines
15 KiB
C
/****************************************************************
|
|
|
|
The author of this software is David M. Gay.
|
|
|
|
Copyright (C) 1998, 1999 by Lucent Technologies
|
|
All Rights Reserved
|
|
|
|
Permission to use, copy, modify, and distribute this software and
|
|
its documentation for any purpose and without fee is hereby
|
|
granted, provided that the above copyright notice appear in all
|
|
copies and that both that the copyright notice and this
|
|
permission notice and warranty disclaimer appear in supporting
|
|
documentation, and that the name of Lucent or any of its entities
|
|
not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
|
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
|
|
IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
|
|
SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
|
|
IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
|
|
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
|
|
THIS SOFTWARE.
|
|
|
|
****************************************************************/
|
|
|
|
/* Please send bug reports to David M. Gay (dmg at acm dot org,
|
|
* with " at " changed at "@" and " dot " changed to "."). */
|
|
|
|
#include "gdtoaimp.h"
|
|
|
|
static Bigint *freelist[Kmax+1];
|
|
#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
|
|
|
|
#ifdef MULTIPLE_THREADS
|
|
static void ACQUIRE_DTOA_LOCK(int n);
|
|
static void FREE_DTOA_LOCK(int n);
|
|
#endif
|
|
|
|
Bigint *
|
|
Balloc
|
|
#ifdef KR_headers
|
|
(k) int k;
|
|
#else
|
|
(int k)
|
|
#endif
|
|
{
|
|
int x;
|
|
Bigint *rv;
|
|
#ifndef Omit_Private_Memory
|
|
unsigned int len;
|
|
#endif
|
|
|
|
ACQUIRE_DTOA_LOCK(0);
|
|
if ( (rv = freelist[k]) !=0) {
|
|
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 (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;
|
|
}
|
|
|
|
void
|
|
Bfree
|
|
#ifdef KR_headers
|
|
(v) Bigint *v;
|
|
#else
|
|
(Bigint *v)
|
|
#endif
|
|
{
|
|
if (v) {
|
|
ACQUIRE_DTOA_LOCK(0);
|
|
v->next = freelist[v->k];
|
|
freelist[v->k] = v;
|
|
FREE_DTOA_LOCK(0);
|
|
}
|
|
}
|
|
|
|
int
|
|
lo0bits
|
|
#ifdef KR_headers
|
|
(y) ULong *y;
|
|
#else
|
|
(ULong *y)
|
|
#endif
|
|
{
|
|
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;
|
|
return k;
|
|
}
|
|
|
|
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++ = (ULong)(y & 0xffffffffUL);
|
|
#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++] = (ULong)carry;
|
|
b->wds = wds;
|
|
}
|
|
return b;
|
|
}
|
|
|
|
int
|
|
hi0bits_D2A
|
|
#ifdef KR_headers
|
|
(x) register ULong x;
|
|
#else
|
|
(register ULong x)
|
|
#endif
|
|
{
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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++) !=0) {
|
|
x = xa;
|
|
xc = xc0;
|
|
carry = 0;
|
|
do {
|
|
z = *x++ * (ULLong)y + *xc + carry;
|
|
carry = z >> 32;
|
|
*xc++ = (ULong)(z & 0xffffffffUL);
|
|
}
|
|
while(x < xae);
|
|
*xc = (ULong)carry;
|
|
}
|
|
}
|
|
#else
|
|
#ifdef Pack_32
|
|
for(; xb < xbe; xb++, xc0++) {
|
|
if ( (y = *xb & 0xffff) !=0) {
|
|
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) !=0) {
|
|
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++) !=0) {
|
|
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;
|
|
|
|
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) !=0)
|
|
b = multadd(b, p05[i-1], 0);
|
|
|
|
if (!(k >>= 2))
|
|
return b;
|
|
if ((p5 = p5s) == 0) {
|
|
/* 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) == 0) {
|
|
#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;
|
|
}
|
|
|
|
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;
|
|
|
|
n = k >> kshift;
|
|
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;
|
|
if (k &= kmask) {
|
|
#ifdef Pack_32
|
|
k1 = 32 - k;
|
|
z = 0;
|
|
do {
|
|
*x1++ = *x << k | z;
|
|
z = *x++ >> k1;
|
|
}
|
|
while(x < xe);
|
|
if ((*x1 = z) !=0)
|
|
++n1;
|
|
#else
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
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 & 1UL;
|
|
*xc++ = (ULong)(y & 0xffffffffUL);
|
|
}
|
|
while(xb < xbe);
|
|
while(xa < xae) {
|
|
y = *xa++ - borrow;
|
|
borrow = y >> 32 & 1UL;
|
|
*xc++ = (ULong)(y & 0xffffffffUL);
|
|
}
|
|
#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;
|
|
}
|
|
|
|
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;
|
|
#endif
|
|
return dval(d);
|
|
}
|
|
#undef d0
|
|
#undef d1
|
|
|
|
Bigint *
|
|
d2b
|
|
#ifdef KR_headers
|
|
(d, e, bits) double d; int *e, *bits;
|
|
#else
|
|
(double _d, int *e, int *bits)
|
|
#endif
|
|
{
|
|
Bigint *b;
|
|
#ifndef Sudden_Underflow
|
|
int i;
|
|
#endif
|
|
int de, k;
|
|
ULong *x, y, z;
|
|
U d;
|
|
#ifdef VAX
|
|
ULong d0, d1;
|
|
#else
|
|
#define d0 word0(d)
|
|
#define d1 word1(d)
|
|
#endif
|
|
|
|
dval(d) = _d;
|
|
#ifdef VAX
|
|
d0 = word0(d) >> 16 | word0(d) << 16;
|
|
d1 = word1(d) >> 16 | word1(d) << 16;
|
|
#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)) !=0)
|
|
z |= Exp_msk1;
|
|
#endif
|
|
#ifdef Pack_32
|
|
if ( (y = d1) !=0) {
|
|
if ( (k = lo0bits(&y)) !=0) {
|
|
x[0] = y | z << 32 - k;
|
|
z >>= k;
|
|
}
|
|
else
|
|
x[0] = y;
|
|
#ifndef Sudden_Underflow
|
|
i =
|
|
#endif
|
|
b->wds = (x[1] = z) !=0 ? 2 : 1;
|
|
}
|
|
else {
|
|
#ifdef DEBUG
|
|
if (!z)
|
|
Bug("Zero passed to d2b");
|
|
#endif
|
|
k = lo0bits(&z);
|
|
x[0] = z;
|
|
#ifndef Sudden_Underflow
|
|
i =
|
|
#endif
|
|
b->wds = 1;
|
|
k += 32;
|
|
}
|
|
#else
|
|
if ( (y = d1) !=0) {
|
|
if ( (k = lo0bits(&y)) !=0)
|
|
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
|
|
|
|
CONST double
|
|
#ifdef IEEE_Arith
|
|
bigtens[] = { 1e16, 1e32, 1e64, 1e128, 1e256 };
|
|
CONST double tinytens[] = { 1e-16, 1e-32, 1e-64, 1e-128, 1e-256
|
|
};
|
|
#else
|
|
#ifdef IBM
|
|
bigtens[] = { 1e16, 1e32, 1e64 };
|
|
CONST double tinytens[] = { 1e-16, 1e-32, 1e-64 };
|
|
#else
|
|
bigtens[] = { 1e16, 1e32 };
|
|
CONST double tinytens[] = { 1e-16, 1e-32 };
|
|
#endif
|
|
#endif
|
|
|
|
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
|
|
};
|
|
|
|
char *
|
|
#ifdef KR_headers
|
|
strcp_D2A(a, b) char *a; char *b;
|
|
#else
|
|
strcp_D2A(char *a, CONST char *b)
|
|
#endif
|
|
{
|
|
while(*a = *b++)
|
|
a++;
|
|
return a;
|
|
}
|
|
|
|
#ifdef NO_STRING_H
|
|
|
|
KR_VOID *
|
|
#ifdef KR_headers
|
|
memcpy_D2A(a, b, len) char *a; char *b; size_t len;
|
|
#else
|
|
memcpy_D2A(void *a1, void *b1, size_t len)
|
|
#endif
|
|
{
|
|
register char *a = (char*)a1, *ae = a + len;
|
|
register char *b = (char*)b1, *a0 = a;
|
|
while(a < ae)
|
|
*a++ = *b++;
|
|
return a0;
|
|
}
|
|
|
|
#endif /* NO_STRING_H */
|
|
|
|
|
|
#ifdef MULTIPLE_THREADS
|
|
#ifdef _WIN32
|
|
|
|
#undef Bias
|
|
#define WIN32_LEAN_AND_MEAN
|
|
#include <windows.h>
|
|
|
|
static CRITICAL_SECTION dtoa_lock[2];
|
|
static int did_init;
|
|
|
|
void ACQUIRE_DTOA_LOCK(int n)
|
|
{
|
|
if (!did_init)
|
|
{
|
|
did_init = 1;
|
|
InitializeCriticalSection(&dtoa_lock[0]);
|
|
InitializeCriticalSection(&dtoa_lock[1]);
|
|
}
|
|
EnterCriticalSection(&dtoa_lock[n]);
|
|
}
|
|
|
|
void FREE_DTOA_LOCK(int n)
|
|
{
|
|
LeaveCriticalSection(&dtoa_lock[n]);
|
|
}
|
|
|
|
#else
|
|
|
|
#include <pthread.h>
|
|
|
|
static pthread_mutex_t dtoa_lock[2] = { PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER };
|
|
|
|
void ACQUIRE_DTOA_LOCK(int n)
|
|
{
|
|
pthread_mutex_lock(&dtoa_lock[n]);
|
|
}
|
|
|
|
void FREE_DTOA_LOCK(int n)
|
|
{
|
|
pthread_mutex_unlock(&dtoa_lock[n]);
|
|
}
|
|
|
|
#endif
|
|
#endif
|