[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/libc/glibc/glibc-2.22/math/w_tgamma.c b/ap/libc/glibc/glibc-2.22/math/w_tgamma.c
new file mode 100644
index 0000000..1ca7765
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.22/math/w_tgamma.c
@@ -0,0 +1,46 @@
+/* @(#)w_gamma.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.
+ * ====================================================
+ */
+
+/* double gamma(double x)
+ * Return the logarithm of the Gamma function of x or the Gamma function of x,
+ * depending on the library mode.
+ */
+
+#include <errno.h>
+#include <math.h>
+#include <math_private.h>
+
+double
+__tgamma(double x)
+{
+ int local_signgam;
+ double y = __ieee754_gamma_r(x,&local_signgam);
+
+ if(__glibc_unlikely (!isfinite (y) || y == 0)
+ && (isfinite (x) || isinf (x) < 0)
+ && _LIB_VERSION != _IEEE_) {
+ if (x == 0.0)
+ return __kernel_standard(x,x,50); /* tgamma pole */
+ else if(__floor(x)==x&&x<0.0)
+ return __kernel_standard(x,x,41); /* tgamma domain */
+ else if (y == 0)
+ __set_errno (ERANGE); /* tgamma underflow */
+ else
+ return __kernel_standard(x,x,40); /* tgamma overflow */
+ }
+ return local_signgam < 0 ? -y : y;
+}
+weak_alias (__tgamma, tgamma)
+#ifdef NO_LONG_DOUBLE
+strong_alias (__tgamma, __tgammal)
+weak_alias (__tgamma, tgammal)
+#endif