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-rw-r--r--sysdeps/wordsize-32/fixsfdi.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/sysdeps/wordsize-32/fixsfdi.c b/sysdeps/wordsize-32/fixsfdi.c
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+++ b/sysdeps/wordsize-32/fixsfdi.c
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+/* Convert float to 64-bit int.
+   Copyright (C) 1989, 1992-2001, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <endian.h>
+#include <stdlib.h>
+#include <bits/wordsize.h>
+#include <shlib-compat.h>
+
+#if __WORDSIZE != 32
+# error This is for 32-bit targets only
+#endif
+
+#if SHLIB_COMPAT(libc, GLIBC_2_0, GLIBC_2_2_6)
+
+typedef unsigned int UQItype	__attribute__ ((mode (QI)));
+typedef          int SItype	__attribute__ ((mode (SI)));
+typedef unsigned int USItype	__attribute__ ((mode (SI)));
+typedef          int DItype	__attribute__ ((mode (DI)));
+typedef unsigned int UDItype	__attribute__ ((mode (DI)));
+typedef         float SFtype	__attribute__ ((mode (SF)));
+typedef         float DFtype	__attribute__ ((mode (DF)));
+#define Wtype SItype
+#define HWtype SItype
+#define DWtype DItype
+#define UWtype USItype
+#define UHWtype USItype
+#define UDWtype UDItype
+#define W_TYPE_SIZE 32
+
+#include <stdlib/longlong.h>
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+struct DWstruct { Wtype high, low;};
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+struct DWstruct { Wtype low, high;};
+#else
+#error Unhandled endianity
+#endif
+typedef union { struct DWstruct s; DWtype ll; } DWunion;
+
+
+#define WORD_SIZE __WORDSIZE
+#define HIGH_WORD_COEFF (((UDWtype) 1) << WORD_SIZE)
+
+
+DWtype
+___fixunssfDI (SFtype original_a)
+{ 
+  /* Convert the SFtype to a DFtype, because that is surely not going
+     to lose any bits.  Some day someone else can write a faster version
+     that avoids converting to DFtype, and verify it really works right.  */
+  DFtype a = original_a;
+  DFtype b;
+  UDWtype v;
+
+  if (a < 0)
+    return 0;
+
+  /* Compute high word of result, as a flonum.  */
+  b = (a / HIGH_WORD_COEFF);
+  /* Convert that to fixed (but not to DWtype!),
+     and shift it into the high word.  */
+  v = (UWtype) b;
+  v <<= WORD_SIZE;
+  /* Remove high part from the DFtype, leaving the low part as flonum.  */
+  a -= (DFtype) v;
+  /* Convert that to fixed (but not to DWtype!) and add it in.
+     Sometimes A comes out negative.  This is significant, since
+     A has more bits than a long int does.  */
+  if (a < 0)
+    v -= (UWtype) (- a);
+  else
+    v += (UWtype) a;
+  return v;
+}
+symbol_version (___fixunssfDI, __fixunssfDI, GLIBC_2.0);
+
+
+DWtype
+___fixsfdi (SFtype a)
+{
+  if (a < 0)
+    return - __fixunssfDI (-a);
+  return __fixunssfDI (a);
+}
+symbol_version (___fixsfdi, __fixsfdi, GLIBC_2.0);