diff options
Diffstat (limited to 'StdLib/LibC/gdtoa/smisc.c')
| -rw-r--r-- | StdLib/LibC/gdtoa/smisc.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/StdLib/LibC/gdtoa/smisc.c b/StdLib/LibC/gdtoa/smisc.c new file mode 100644 index 0000000000..59e4f97dcc --- /dev/null +++ b/StdLib/LibC/gdtoa/smisc.c @@ -0,0 +1,209 @@ +/* $NetBSD: smisc.c,v 1.2.14.1 2008/04/08 21:10:55 jdc Exp $ */
+
+/****************************************************************
+
+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 <LibConfig.h>
+
+#include "gdtoaimp.h"
+
+#if defined(_MSC_VER) /* Handle Microsoft VC++ compiler specifics. */
+// Disable: warning C4700: uninitialized local variable 'xx' used
+#pragma warning ( disable : 4700 )
+#endif /* defined(_MSC_VER) */
+
+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);
+ if (b == NULL)
+ return NULL;
+ b->x[0] = y9;
+ b->wds = 1;
+#else
+ b = Balloc(k+1);
+ if (b == NULL)
+ return NULL;
+ 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');
+ if (b == NULL)
+ return NULL;
+ } while(++i < nd0);
+ s++;
+ }
+ else
+ s += 10;
+ for(; i < nd; i++) {
+ b = multadd(b, 10, *s++ - '0');
+ if (b == NULL)
+ return NULL;
+ }
+ return b;
+ }
+
+ double
+ratio
+#ifdef KR_headers
+ (a, b) Bigint *a, *b;
+#else
+ (Bigint *a, Bigint *b)
+#endif
+{
+ double da, db;
+ int k, ka, kb;
+
+ dval(da) = b2d(a, &ka);
+ dval(db) = b2d(b, &kb);
+ k = ka - kb + ULbits*(a->wds - b->wds);
+#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);
+ }
+
+#ifdef INFNAN_CHECK
+
+ int
+match
+#ifdef KR_headers
+ (sp, t) CONST char **sp, *t;
+#else
+ (CONST char **sp, CONST char *t)
+#endif
+{
+ int c, d;
+ CONST char *s = *sp;
+
+ while( (d = *t++) !=0) {
+ if ((c = *++s) >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ if (c != d)
+ return 0;
+ }
+ *sp = s + 1;
+ return 1;
+ }
+#endif /* INFNAN_CHECK */
+
+ void
+#ifdef KR_headers
+copybits(c, n, b) ULong *c; int n; Bigint *b;
+#else
+copybits(ULong *c, int n, Bigint *b)
+#endif
+{
+ ULong *ce, *x, *xe;
+#ifdef Pack_16
+ int nw, nw1;
+#endif
+
+ ce = c + ((unsigned int)(n-1) >> kshift) + 1;
+ x = b->x;
+#ifdef Pack_32
+ xe = x + b->wds;
+ while(x < xe)
+ *c++ = *x++;
+#else
+ nw = b->wds;
+ nw1 = nw & 1;
+ for(xe = x + (nw - nw1); x < xe; x += 2)
+ Storeinc(c, x[1], x[0]);
+ if (nw1)
+ *c++ = *x;
+#endif
+ while(c < ce)
+ *c++ = 0;
+ }
+
+ ULong
+#ifdef KR_headers
+any_on(b, k) Bigint *b; int k;
+#else
+any_on(Bigint *b, int k)
+#endif
+{
+ int n, nwds;
+ ULong *x, *x0, x1, x2;
+
+ x = b->x;
+ nwds = b->wds;
+ n = (unsigned int)k >> kshift;
+ if (n > nwds)
+ n = nwds;
+ else if (n < nwds && (k &= kmask)) {
+ x1 = x2 = x[n];
+ x1 >>= k;
+ x1 <<= k;
+ if (x1 != x2)
+ return 1;
+ }
+ x0 = x;
+ x += n;
+ while(x > x0)
+ if (*--x)
+ return 1;
+ return 0;
+ }
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