[libclc] 04/79: amdgpu: Add workaround for unimplemented llvm.exp intrinsic

[Andreas Boll]

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commit 6ce57041431533b02af120d4fe24c25e87c6baef
Author: Jan Vesely <jan.vesely at rutgers.edu>
Date:   Fri Nov 10 22:16:25 2017 +0000

    amdgpu: Add workaround for unimplemented llvm.exp intrinsic
    
    Reviewer: Jeroen Ketema
    Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
    
    git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@317935 91177308-0d34-0410-b5e6-96231b3b80d8
---
 amdgpu/lib/SOURCES             | 1 +
 amdgpu/lib/math/native_exp.cl  | 5 +++++
 amdgpu/lib/math/native_exp.inc | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/amdgpu/lib/SOURCES b/amdgpu/lib/SOURCES
index 59d8b22..20322ec 100644
--- a/amdgpu/lib/SOURCES
+++ b/amdgpu/lib/SOURCES
@@ -1,3 +1,4 @@
+math/native_exp.cl
 math/native_log.cl
 math/native_log10.cl
 math/nextafter.cl
diff --git a/amdgpu/lib/math/native_exp.cl b/amdgpu/lib/math/native_exp.cl
new file mode 100644
index 0000000..71c9a2e
--- /dev/null
+++ b/amdgpu/lib/math/native_exp.cl
@@ -0,0 +1,5 @@
+#include <clc/clc.h>
+
+#define __CLC_BODY <native_exp.inc>
+#define __FLOAT_ONLY
+#include <clc/math/gentype.inc>
diff --git a/amdgpu/lib/math/native_exp.inc b/amdgpu/lib/math/native_exp.inc
new file mode 100644
index 0000000..c61ec01
--- /dev/null
+++ b/amdgpu/lib/math/native_exp.inc
@@ -0,0 +1,3 @@
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE native_exp(__CLC_GENTYPE val) {
+  return native_exp2(val * M_LOG2E_F);
+}

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