[libclc] 13/79: native_rsqrt: Switch implementation to 1 / native_sqrt

[Andreas Boll]

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commit cee90c32ef2521cc69331beab3c4e59637b705fc
Author: Jan Vesely <jan.vesely at rutgers.edu>
Date:   Mon Nov 13 18:28:51 2017 +0000

    native_rsqrt: Switch implementation to 1 / native_sqrt
    
    Reviewer: Jeroen Ketema
    Signed-off-by: Jan Vesely <jan.vesely at rutgers.edu>
    
    git-svn-id: https://llvm.org/svn/llvm-project/libclc/trunk@318065 91177308-0d34-0410-b5e6-96231b3b80d8
---
 generic/include/clc/math/native_rsqrt.h | 10 +++++++++-
 generic/lib/SOURCES                     |  1 +
 generic/lib/math/native_rsqrt.cl        |  5 +++++
 generic/lib/math/native_rsqrt.inc       |  3 +++
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/generic/include/clc/math/native_rsqrt.h b/generic/include/clc/math/native_rsqrt.h
index eabc425..dbc8deb 100644
--- a/generic/include/clc/math/native_rsqrt.h
+++ b/generic/include/clc/math/native_rsqrt.h
@@ -1 +1,9 @@
-#define native_rsqrt rsqrt
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION native_rsqrt
+#define __FLOAT_ONLY
+
+#include <clc/math/gentype.inc>
+
+#undef __FLOAT_ONLY
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index b5e8c92..296c93b 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -126,6 +126,7 @@ math/native_exp2.cl
 math/native_log.cl
 math/native_log10.cl
 math/native_log2.cl
+math/native_rsqrt.cl
 math/native_sin.cl
 math/native_sqrt.cl
 math/native_tan.cl
diff --git a/generic/lib/math/native_rsqrt.cl b/generic/lib/math/native_rsqrt.cl
new file mode 100644
index 0000000..50bc905
--- /dev/null
+++ b/generic/lib/math/native_rsqrt.cl
@@ -0,0 +1,5 @@
+#include <clc/clc.h>
+
+#define __CLC_BODY <native_rsqrt.inc>
+#define __FLOAT_ONLY
+#include <clc/math/gentype.inc>
diff --git a/generic/lib/math/native_rsqrt.inc b/generic/lib/math/native_rsqrt.inc
new file mode 100644
index 0000000..f108145
--- /dev/null
+++ b/generic/lib/math/native_rsqrt.inc
@@ -0,0 +1,3 @@
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE native_rsqrt(__CLC_GENTYPE val) {
+  return 1.0f / native_sqrt(val);
+}

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