[Libclc-dev] [PATCH v3 1/2] amdgpu/math: Don't use llvm instrinsic for native_log

[Jan Vesely via Libclc-dev]

AMDGPU targets don't have insturction for it,
so it'll be expanded to C * log2 anyway.

v2: use native_log2 instead of the more precise sw implementation
v3: move to amdgpu

Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
---
 amdgpu/lib/SOURCES             |  1 +
 amdgpu/lib/math/native_log.cl  | 27 +++++++++++++++++++++++++++
 amdgpu/lib/math/native_log.inc | 25 +++++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 amdgpu/lib/math/native_log.cl
 create mode 100644 amdgpu/lib/math/native_log.inc

diff --git a/amdgpu/lib/SOURCES b/amdgpu/lib/SOURCES
index ce5fe66..8cbe1d4 100644
--- a/amdgpu/lib/SOURCES
+++ b/amdgpu/lib/SOURCES
@@ -1,2 +1,3 @@
+math/native_log.cl
 math/nextafter.cl
 math/sqrt.cl
diff --git a/amdgpu/lib/math/native_log.cl b/amdgpu/lib/math/native_log.cl
new file mode 100644
index 0000000..f8ba08f
--- /dev/null
+++ b/amdgpu/lib/math/native_log.cl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2014,2015 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.
+ */
+
+#include <clc/clc.h>
+
+#define __CLC_BODY <native_log.inc>
+#define __FLOAT_ONLY
+#include <clc/math/gentype.inc>
diff --git a/amdgpu/lib/math/native_log.inc b/amdgpu/lib/math/native_log.inc
new file mode 100644
index 0000000..d4950c2
--- /dev/null
+++ b/amdgpu/lib/math/native_log.inc
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2014,2015 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_DEF __CLC_GENTYPE native_log(__CLC_GENTYPE val) {
+  return native_log2(val) * (1.0f / M_LOG2E_F);
+}
-- 
2.13.6