1 files changed, 75 insertions, 0 deletions
diff --git a/newlib/libm/math/wrf_lgamma.c b/newlib/libm/math/wrf_lgamma.c
new file mode 100644
index 00000000000..73985e2714e
--- /dev/null
+++ b/newlib/libm/math/wrf_lgamma.c
@@ -0,0 +1,75 @@
+/* wrf_lgamma.c -- float version of wr_lgamma.c.
+ * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
+ */
+
+/*
+ * ====================================================
+ * 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.
+ * ====================================================
+ */
+
+/* 
+ * wrapper float lgammaf_r(float x, int *signgamp)
+ */
+
+#include "fdlibm.h"
+#include <errno.h>
+
+#ifdef __STDC__
+	float lgammaf_r(float x, int *signgamp) /* wrapper lgammaf_r */
+#else
+	float lgammaf_r(x,signgamp)              /* wrapper lgammaf_r */
+	float x; int *signgamp;
+#endif
+{
+#ifdef _IEEE_LIBM
+	return __ieee754_lgammaf_r(x,signgamp);
+#else
+        float y;
+	struct exception exc;
+        y = __ieee754_lgammaf_r(x,signgamp);
+        if(_LIB_VERSION == _IEEE_) return y;
+        if(!finitef(y)&&finitef(x)) {
+#ifndef HUGE_VAL 
+#define HUGE_VAL inf
+	    double inf = 0.0;
+
+	    SET_HIGH_WORD(inf,0x7ff00000);	/* set inf to infinite */
+#endif
+	    exc.name = "lgammaf";
+	    exc.err = 0;
+	    exc.arg1 = exc.arg2 = (double)x;
+            if (_LIB_VERSION == _SVID_)
+               exc.retval = HUGE;
+            else
+               exc.retval = HUGE_VAL;
+	    if(floorf(x)==x&&x<=(float)0.0) {
+		/* lgammaf(-integer) or lgamma(0) */
+		exc.type = SING;
+		if (_LIB_VERSION == _POSIX_)
+		   errno = EDOM;
+		else if (!matherr(&exc)) {
+		   errno = EDOM;
+		}
+
+            } else {
+		/* lgammaf(finite) overflow */
+		exc.type = OVERFLOW;
+                if (_LIB_VERSION == _POSIX_)
+		   errno = ERANGE;
+                else if (!matherr(&exc)) {
+                   errno = ERANGE;
+		}
+            }
+	    if (exc.err != 0)
+	       errno = exc.err;
+            return (float)exc.retval; 
+        } else
+            return y;
+#endif
+}