From 7a09e88b6eac8c6b02ba02ef6b9c9d260247b7df Mon Sep 17 00:00:00 2001
From: Tom Stellard <thomas.stellard@amd.com>
Date: Fri, 24 Jul 2015 18:07:14 +0000
Subject: [PATCH] Fix double implementation of log

We need to use M_LOG2E instead of M_LOG2E_F.

llvm-svn: 243132
---
 libclc/generic/include/clc/math/log.h   | 26 ++++++++++++++++++++++---
 libclc/generic/include/clc/math/log.inc | 23 ++++++++++++++++++++++
 libclc/generic/lib/SOURCES              |  1 +
 libclc/generic/lib/math/log.cl          | 26 +++++++++++++++++++++++++
 4 files changed, 73 insertions(+), 3 deletions(-)
 create mode 100644 libclc/generic/include/clc/math/log.inc
 create mode 100644 libclc/generic/lib/math/log.cl

diff --git a/libclc/generic/include/clc/math/log.h b/libclc/generic/include/clc/math/log.h
index ee272eb30d37..5680de2c1e02 100644
--- a/libclc/generic/include/clc/math/log.h
+++ b/libclc/generic/include/clc/math/log.h
@@ -1,4 +1,24 @@
-#undef log
+/*
+ * Copyright (c) 2015 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.
+ */
 
-// log(x) = log2(x) * (1/log2(e))
-#define log(val) (log2(val) * 0.693147181f)
+#define __CLC_BODY <clc/math/log.inc>
+#include <clc/math/gentype.inc>
diff --git a/libclc/generic/include/clc/math/log.inc b/libclc/generic/include/clc/math/log.inc
new file mode 100644
index 000000000000..621dd0831b46
--- /dev/null
+++ b/libclc/generic/include/clc/math/log.inc
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+
+_CLC_OVERLOAD _CLC_DECL __CLC_GENTYPE log(__CLC_GENTYPE a);
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
index 53959d5560f1..a5ee9f81af85 100644
--- a/libclc/generic/lib/SOURCES
+++ b/libclc/generic/lib/SOURCES
@@ -91,6 +91,7 @@ math/half_sqrt.cl
 math/hypot.cl
 math/clc_ldexp.cl
 math/ldexp.cl
+math/log.cl
 math/log10.cl
 math/log1p.cl
 math/log2.cl
diff --git a/libclc/generic/lib/math/log.cl b/libclc/generic/lib/math/log.cl
new file mode 100644
index 000000000000..ec1faa12606a
--- /dev/null
+++ b/libclc/generic/lib/math/log.cl
@@ -0,0 +1,26 @@
+#include <clc/clc.h>
+#include "../clcmacro.h"
+
+/*
+ *log(x) = log2(x) * (1/log2(e))
+ */
+
+_CLC_OVERLOAD _CLC_DEF float log(float x)
+{
+    return log2(x) * (1.0f / M_LOG2E_F);
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, float, log, float);
+
+#ifdef cl_khr_fp64
+
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_OVERLOAD _CLC_DEF double log(double x)
+{
+    return log2(x) * (1.0 / M_LOG2E);
+}
+
+_CLC_UNARY_VECTORIZE(_CLC_OVERLOAD _CLC_DEF, double, log, double);
+
+#endif // cl_khr_fp64