Add rsqrt builtin. Based on patch by Cassie Epps!

llvm-svn: 162274

diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
index 4f49760..565b505 100644 (file)
--- a/libclc/generic/include/clc/clc.h
+++ b/libclc/generic/include/clc/clc.h
@@ -53,6 +53,7 @@
 #include <clc/math/native_log2.h>
 #include <clc/math/native_sin.h>
 #include <clc/math/native_sqrt.h>
+#include <clc/math/rsqrt.h>
 
 /* 6.11.3 Integer Functions */
 #include <clc/integer/abs.h>

diff --git a/libclc/generic/include/clc/math/rsqrt.h b/libclc/generic/include/clc/math/rsqrt.h
new file mode 100644 (file)
index 0000000..8fd2cbf
--- /dev/null
+++ b/libclc/generic/include/clc/math/rsqrt.h
@@ -0,0 +1 @@
+#define rsqrt(x) (1.f/sqrt(x))\r

diff --git a/libclc/test/rsqrt.cl b/libclc/test/rsqrt.cl
new file mode 100644 (file)
index 0000000..13ad216
--- /dev/null
+++ b/libclc/test/rsqrt.cl
@@ -0,0 +1,6 @@
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+__kernel void foo(float4 *x, double4 *y) {
+  x[1] = rsqrt(x[0]);
+  y[1] = rsqrt(y[0]);
+}