import newlib-2000-02-17 snapshot

1 files changed, 107 insertions, 0 deletions

diff --git a/newlib/libm/math/w_fmod.c b/newlib/libm/math/w_fmod.c
new file mode 100644
index 000000000..b6b36cb76
--- /dev/null
+++ b/newlib/libm/math/w_fmod.c
@@ -0,0 +1,107 @@
+
+/* @(#)w_fmod.c 5.1 93/09/24 */
+/*
+ * ====================================================
+ * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
+ *
+ * Developed at SunPro, a Sun Microsystems, Inc. business.
+ * Permission to use, copy, modify, and distribute this
+ * software is freely granted, provided that this notice 
+ * is preserved.
+ * ====================================================
+ */
+
+/* 
+FUNCTION 
+<<fmod>>, <<fmodf>>---floating-point remainder (modulo)
+
+INDEX
+fmod
+INDEX
+fmodf
+
+ANSI_SYNOPSIS
+#include <math.h>
+double fmod(double <[x]>, double <[y]>)
+float fmodf(float <[x]>, float <[y]>)
+
+TRAD_SYNOPSIS
+#include <math.h>
+double fmod(<[x]>, <[y]>)
+double (<[x]>, <[y]>);
+
+float fmodf(<[x]>, <[y]>)
+float (<[x]>, <[y]>);
+
+DESCRIPTION
+The <<fmod>> and <<fmodf>> functions compute the floating-point
+remainder of <[x]>/<[y]> (<[x]> modulo <[y]>).
+
+RETURNS
+The <<fmod>> function returns the value 
+@ifinfo
+<[x]>-<[i]>*<[y]>, 
+@end ifinfo
+@tex
+$x-i\times y$,
+@end tex
+for the largest integer <[i]> such that, if <[y]> is nonzero, the
+result has the same sign as <[x]> and magnitude less than the
+magnitude of <[y]>. 
+
+<<fmod(<[x]>,0)>> returns NaN, and sets <<errno>> to <<EDOM>>.
+
+You can modify error treatment for these functions using <<matherr>>.
+
+PORTABILITY
+<<fmod>> is ANSI C. <<fmodf>> is an extension.
+*/
+
+/* 
+ * wrapper fmod(x,y)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifndef _DOUBLE_IS_32BITS
+
+#ifdef __STDC__
+	double fmod(double x, double y)	/* wrapper fmod */
+#else
+	double fmod(x,y)		/* wrapper fmod */
+	double x,y;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_fmod(x,y);
+#else
+	double z;
+	struct exception exc;
+	z = __ieee754_fmod(x,y);
+	if(_LIB_VERSION == _IEEE_ ||isnan(y)||isnan(x)) return z;
+	if(y==0.0) {
+            /* fmod(x,0) */
+            exc.type = DOMAIN;
+            exc.name = "fmod";
+	    exc.arg1 = x;
+	    exc.arg2 = y;
+	    exc.err = 0;
+            if (_LIB_VERSION == _SVID_)
+               exc.retval = x;
+	    else
+	       exc.retval = 0.0/0.0;
+            if (_LIB_VERSION == _POSIX_)
+               errno = EDOM;
+            else if (!matherr(&exc)) {
+                  errno = EDOM;
+            }
+	    if (exc.err != 0)
+	       errno = exc.err;
+            return exc.retval; 
+	} else
+	    return z;
+#endif
+}
+
+#endif /* defined(_DOUBLE_IS_32BITS) */