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[pf3gnuchains/pf3gnuchains3x.git] / winsup / mingw / mingwex / gdtoa / strtopx.c

diff --git a/winsup/mingw/mingwex/gdtoa/strtopx.c b/winsup/mingw/mingwex/gdtoa/strtopx.c
new file mode 100755 (executable)
index 0000000..c159196
--- /dev/null
+++ b/winsup/mingw/mingwex/gdtoa/strtopx.c
@@ -0,0 +1,124 @@
+/****************************************************************
+
+The author of this software is David M. Gay.
+
+Copyright (C) 1998, 2000 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"
+
+#undef _0
+#undef _1
+
+/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
+
+#ifdef IEEE_MC68k
+#define _0 0
+#define _1 1
+#define _2 2
+#define _3 3
+#define _4 4
+#endif
+#ifdef IEEE_8087
+#define _0 4
+#define _1 3
+#define _2 2
+#define _3 1
+#define _4 0
+#endif
+
+typedef union lD {
+       UShort L[5];
+       long double D;
+} lD;
+
+static int __strtopx (const char *s, char **sp, lD *V)
+{
+       static FPI fpi0 = { 64, 1-16383-64+1, 32766 - 16383 - 64 + 1, 1, SI };
+       ULong bits[2];
+       Long exp;
+       int k;
+       UShort *L = & (V->L[0]);
+#ifdef Honor_FLT_ROUNDS
+#include "gdtoa_fltrnds.h"
+#else
+#define fpi &fpi0
+#endif
+       V->D = 0.0L;
+
+       k = __strtodg(s, sp, fpi, &exp, bits);
+       switch(k & STRTOG_Retmask) {
+         case STRTOG_NoNumber:
+         case STRTOG_Zero:
+               L[0] = L[1] = L[2] = L[3] = L[4] = 0;
+               break;
+
+         case STRTOG_Denormal:
+               L[_0] = 0;
+               goto normal_bits;
+
+         case STRTOG_Normal:
+         case STRTOG_NaNbits:
+               L[_0] = exp + 0x3fff + 63;
+ normal_bits:
+               L[_4] = (UShort)bits[0];
+               L[_3] = (UShort)(bits[0] >> 16);
+               L[_2] = (UShort)bits[1];
+               L[_1] = (UShort)(bits[1] >> 16);
+               break;
+
+         case STRTOG_Infinite:
+               L[_0] = 0x7fff;
+               L[_1] = 0x8000;
+               L[_2] = L[_3] = L[_4] = 0;
+               break;
+
+         case STRTOG_NaN:
+               L[0] = ldus_QNAN0;
+               L[1] = ldus_QNAN1;
+               L[2] = ldus_QNAN2;
+               L[3] = ldus_QNAN3;
+               L[4] = ldus_QNAN4;
+       }
+       if (k & STRTOG_Neg)
+               L[_0] |= 0x8000;
+       return k;
+}
+
+long double __cdecl
+__strtold (const char * __restrict__ src, char ** __restrict__ endptr)
+{
+       lD ret;
+       ret.D = 0.0L;
+       __strtopx(src, endptr,  &ret);
+       return ret.D;
+}
+
+long double __cdecl
+strtold (const char * __restrict__ src, char ** __restrict__ endptr)
+  __attribute__((alias("__strtold")));
+