[Libclc-dev] [PATCH 7/8] Implement half_rsqrt builtin

[Tom Stellard]

This is a generic implementation which just calls rsqrt.
Targets should override this if they want a faster implementation.
---
 generic/include/clc/clc.h             |  1 +
 generic/include/clc/math/half_rsqrt.h | 31 +++++++++++++++++++++++++++++++
 generic/lib/SOURCES                   |  1 +
 generic/lib/math/half_rsqrt.cl        | 30 ++++++++++++++++++++++++++++++
 generic/lib/math/half_rsqrt.inc       | 25 +++++++++++++++++++++++++
 5 files changed, 88 insertions(+)
 create mode 100644 generic/include/clc/math/half_rsqrt.h
 create mode 100644 generic/lib/math/half_rsqrt.cl
 create mode 100644 generic/lib/math/half_rsqrt.inc

diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index 0b897fa..20ced60 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -48,6 +48,7 @@
 #include <clc/math/fmax.h>
 #include <clc/math/fmin.h>
 #include <clc/math/fmod.h>
+#include <clc/math/half_rsqrt.h>
 #include <clc/math/half_sqrt.h>
 #include <clc/math/hypot.h>
 #include <clc/math/log.h>
diff --git a/generic/include/clc/math/half_rsqrt.h b/generic/include/clc/math/half_rsqrt.h
new file mode 100644
index 0000000..e367d82
--- /dev/null
+++ b/generic/include/clc/math/half_rsqrt.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2014,2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#undef half_rsqrt
+
+#define __CLC_BODY <clc/math/unary_decl.inc>
+#define __CLC_FUNCTION half_rsqrt
+
+#include <clc/math/gentype.inc>
+
+#undef __CLC_BODY
+#undef __CLC_FUNCTION
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index f4e054a..554dcbb 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -66,6 +66,7 @@ math/copysign.cl
 math/cos.cl
 math/exp.cl
 math/exp10.cl
+math/half_rsqrt.cl
 math/half_sqrt.cl
 math/fmax.cl
 math/fmin.cl
diff --git a/generic/lib/math/half_rsqrt.cl b/generic/lib/math/half_rsqrt.cl
new file mode 100644
index 0000000..85695b0
--- /dev/null
+++ b/generic/lib/math/half_rsqrt.cl
@@ -0,0 +1,30 @@
+/*
+ * Copyright (c) 2014,2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <clc/clc.h>
+
+#ifdef cl_khr_fp64
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+#endif
+
+#define __CLC_BODY <half_rsqrt.inc>
+#include <clc/math/gentype.inc>
diff --git a/generic/lib/math/half_rsqrt.inc b/generic/lib/math/half_rsqrt.inc
new file mode 100644
index 0000000..33ce6c2
--- /dev/null
+++ b/generic/lib/math/half_rsqrt.inc
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2014,2015 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE half_rsqrt(__CLC_GENTYPE val) {
+  return rsqrt(val);
+}
-- 
2.0.4