math: Add erf ported from amd-builtins

jvesely · jvesely · commit c374cb76f467 · 2016-05-06T18:02:30.000Z
The scalar float/double function bodies are a direct copy/paste,
aside from the removed (optional) code in float function body that
requires subnormals.

reviewers: jvesely

Patch by: Vedran Miletić &lt;rivanvx@gmail.com&gt;

llvm-svn: 268766
diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
@@ -47,6 +47,7 @@
 #include <clc/math/cos.h>
 #include <clc/math/cospi.h>
 #include <clc/math/ceil.h>
+#include <clc/math/erf.h>
 #include <clc/math/erfc.h>
 #include <clc/math/exp.h>
 #include <clc/math/exp10.h>
diff --git a/libclc/generic/include/clc/math/erf.h b/libclc/generic/include/clc/math/erf.h
@@ -0,0 +1,9 @@
+#undef erfc
+
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION erf
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
@@ -77,6 +77,7 @@ math/copysign.cl
 math/cos.cl
 math/cospi.cl
 math/ep_log.cl
+math/erf.cl
 math/erfc.cl
 math/exp.cl
 math/exp_helper.cl
diff --git a/libclc/generic/lib/math/erf.cl b/libclc/generic/lib/math/erf.cl
