From a1aba44ffa742e02b0b0cc555d8359d456402fc2 Mon Sep 17 00:00:00 2001
From: Jan Vesely <jan.vesely@rutgers.edu>
Date: Thu, 18 Jan 2018 21:11:56 +0000
Subject: [PATCH] half_log2: Implement using log2

Passes CTS on carrizo
v2: Use full precision implementation

Reviewer: Jeroen Ketema <j.ketema@xs4all.nl>
Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
llvm-svn: 322895
---
 libclc/generic/include/clc/clc.h            | 1 +
 libclc/generic/include/clc/math/half_log2.h | 9 +++++++++
 libclc/generic/lib/SOURCES                  | 1 +
 libclc/generic/lib/math/half_log2.cl        | 6 ++++++
 4 files changed, 17 insertions(+)
 create mode 100644 libclc/generic/include/clc/math/half_log2.h
 create mode 100644 libclc/generic/lib/math/half_log2.cl

diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
index 33392e60d6bb..a52ed5d3d2b9 100644
--- a/libclc/generic/include/clc/clc.h
+++ b/libclc/generic/include/clc/clc.h
@@ -76,6 +76,7 @@
 #include <clc/math/half_exp2.h>
 #include <clc/math/half_log.h>
 #include <clc/math/half_log10.h>
+#include <clc/math/half_log2.h>
 #include <clc/math/half_rsqrt.h>
 #include <clc/math/half_sqrt.h>
 #include <clc/math/hypot.h>
diff --git a/libclc/generic/include/clc/math/half_log2.h b/libclc/generic/include/clc/math/half_log2.h
new file mode 100644
index 000000000000..6a371ab46fd9
--- /dev/null
+++ b/libclc/generic/include/clc/math/half_log2.h
@@ -0,0 +1,9 @@
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION half_log2
+#define __FLOAT_ONLY
+
+#include <clc/math/gentype.inc>
+
+#undef __FLOAT_ONLY
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
index 2fcb59c175f1..11a4ca8e3d77 100644
--- a/libclc/generic/lib/SOURCES
+++ b/libclc/generic/lib/SOURCES
@@ -110,6 +110,7 @@ math/half_exp10.cl
 math/half_exp2.cl
 math/half_log.cl
 math/half_log10.cl
+math/half_log2.cl
 math/half_rsqrt.cl
 math/half_sqrt.cl
 math/hypot.cl
diff --git a/libclc/generic/lib/math/half_log2.cl b/libclc/generic/lib/math/half_log2.cl
new file mode 100644
index 000000000000..d98a61158fb0
--- /dev/null
+++ b/libclc/generic/lib/math/half_log2.cl
@@ -0,0 +1,6 @@
+#include <clc/clc.h>
+
+#define __CLC_FUNC log2
+#define __CLC_BODY <half_unary.inc>
+#define __FLOAT_ONLY
+#include <clc/math/gentype.inc>