[libclc] r281566 - math: Implement tgamma

[Aaron Watry via cfe-commits]

Author: awatry
Date: Wed Sep 14 19:17:34 2016
New Revision: 281566

URL: http://llvm.org/viewvc/llvm-project?rev=281566&view=rev
Log:
math: Implement tgamma

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

Added:
    libclc/trunk/generic/include/clc/math/tgamma.h
    libclc/trunk/generic/include/clc/math/tgamma.inc
    libclc/trunk/generic/lib/math/tgamma.cl
Modified:
    libclc/trunk/generic/include/clc/clc.h
    libclc/trunk/generic/lib/SOURCES

Modified: libclc/trunk/generic/include/clc/clc.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/clc.h?rev=281566&r1=281565&r2=281566&view=diff
==============================================================================
--- libclc/trunk/generic/include/clc/clc.h (original)
+++ libclc/trunk/generic/include/clc/clc.h Wed Sep 14 19:17:34 2016
@@ -88,6 +88,7 @@
 #include <clc/math/sqrt.h>
 #include <clc/math/tan.h>
 #include <clc/math/tanh.h>
+#include <clc/math/tgamma.h>
 #include <clc/math/trunc.h>
 #include <clc/math/native_cos.h>
 #include <clc/math/native_divide.h>

Added: libclc/trunk/generic/include/clc/math/tgamma.h
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/math/tgamma.h?rev=281566&view=auto
==============================================================================
--- libclc/trunk/generic/include/clc/math/tgamma.h (added)
+++ libclc/trunk/generic/include/clc/math/tgamma.h Wed Sep 14 19:17:34 2016
@@ -0,0 +1,3 @@
+#define __CLC_BODY <clc/math/tgamma.inc>
+#include <clc/math/gentype.inc>
+#undef __CLC_BODY

Added: libclc/trunk/generic/include/clc/math/tgamma.inc
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/include/clc/math/tgamma.inc?rev=281566&view=auto
==============================================================================
--- libclc/trunk/generic/include/clc/math/tgamma.inc (added)
+++ libclc/trunk/generic/include/clc/math/tgamma.inc Wed Sep 14 19:17:34 2016
@@ -0,0 +1 @@
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE tgamma(__CLC_GENTYPE a);

Modified: libclc/trunk/generic/lib/SOURCES
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/SOURCES?rev=281566&r1=281565&r2=281566&view=diff
==============================================================================
--- libclc/trunk/generic/lib/SOURCES (original)
+++ libclc/trunk/generic/lib/SOURCES Wed Sep 14 19:17:34 2016
@@ -119,6 +119,7 @@ math/clc_sqrt.cl
 math/sqrt.cl
 math/tan.cl
 math/tanh.cl
+math/tgamma.cl
 relational/all.cl
 relational/any.cl
 relational/bitselect.cl

Added: libclc/trunk/generic/lib/math/tgamma.cl
URL: http://llvm.org/viewvc/llvm-project/libclc/trunk/generic/lib/math/tgamma.cl?rev=281566&view=auto
==============================================================================
--- libclc/trunk/generic/lib/math/tgamma.cl (added)
+++ libclc/trunk/generic/lib/math/tgamma.cl Wed Sep 14 19:17:34 2016
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2016 Aaron Watry
+ * 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 "math.h"
+#include "../clcmacro.h"
+
+_CLC_OVERLOAD _CLC_DEF float tgamma(float x) {
+    const float pi = 3.1415926535897932384626433832795f;
+    float ax = fabs(x);
+    float lg = lgamma(ax);
+    float g = exp(lg);
+
+    if (x < 0.0f) {
+        float z = sinpi(x);
+        g = g * ax * z;
+        g = pi / g;
+        g = g == 0 ? as_float(PINFBITPATT_SP32) : g;
+        g = z == 0 ? as_float(QNANBITPATT_SP32) : g;
+    }
+
+    return g;
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, tgamma, float);
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_OVERLOAD _CLC_DEF double tgamma(double x) {
+    const double pi = 3.1415926535897932384626433832795;
+    double ax = fabs(x);
+    double lg = lgamma(ax);
+    double g = exp(lg);
+
+    if (x < 0.0) {
+        double z = sinpi(x);
+        g = g * ax * z;
+        g = pi / g;
+        g = g == 0 ? as_double(PINFBITPATT_DP64) : g;
+        g = z == 0 ? as_double(QNANBITPATT_DP64) : g;
+    }
+
+    return g;
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, tgamma, double);
+
+#endif