math: Implement lgamma

Just use lgamma_r and ignore the value returned in the second argument

Signed-off-by: Aaron Watry <awatry@gmail.com>
Reviewed-by: Tom Stellard <thomas.stellard@amd.com>

git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@281565 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 49 insertions, 0 deletions

diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index 934606c..fecbd59 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -69,6 +69,7 @@
 #include <clc/math/hypot.h>
 #include <clc/math/ilogb.h>
 #include <clc/math/ldexp.h>
+#include <clc/math/lgamma.h>
 #include <clc/math/lgamma_r.h>
 #include <clc/math/log.h>
 #include <clc/math/log10.h>
diff --git a/generic/include/clc/math/lgamma.h b/generic/include/clc/math/lgamma.h
new file mode 100644
index 0000000..9181856
--- /dev/null
+++ b/generic/include/clc/math/lgamma.h
@@ -0,0 +1,2 @@
+#define __CLC_BODY <clc/math/lgamma.inc>
+#include <clc/math/gentype.inc>
diff --git a/generic/include/clc/math/lgamma.inc b/generic/include/clc/math/lgamma.inc
new file mode 100644
index 0000000..95e4079
--- /dev/null
+++ b/generic/include/clc/math/lgamma.inc
@@ -0,0 +1 @@
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE lgamma(__CLC_GENTYPE a);
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index 6ddae4d..bcd0991 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -97,6 +97,7 @@ math/hypot.cl
 math/ilogb.cl
 math/clc_ldexp.cl
 math/ldexp.cl
+math/lgamma.cl
 math/lgamma_r.cl
 math/log.cl
 math/log10.cl
diff --git a/generic/lib/math/lgamma.cl b/generic/lib/math/lgamma.cl
new file mode 100644
index 0000000..26cd20e
--- /dev/null
+++ b/generic/lib/math/lgamma.cl
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2016 Aaron Watry <awatry@gmail.com>
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <clc/clc.h>
+#include "../clcmacro.h"
+
+_CLC_OVERLOAD _CLC_DEF float lgamma(float x) {
+    int s;
+    return lgamma_r(x, &s);
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, lgamma, float)
+
+#ifdef cl_khr_fp64
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_OVERLOAD _CLC_DEF double lgamma(double x) {
+    int s;
+    return lgamma_r(x, &s);
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, lgamma, double)
+
+#endif
\ No newline at end of file