Implement fast_length builtin

This implementation was ported from the AMD builtin library
and has been tested with piglit, OpenCV, and the ocl conformance tests.

llvm-svn: 232977

5 files changed, 109 insertions, 0 deletions

diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
index bc6fb2a3c6e..efd9b927c3c 100644
--- a/libclc/generic/include/clc/clc.h
+++ b/libclc/generic/include/clc/clc.h
@@ -120,6 +120,7 @@
 #include <clc/geometric/cross.h>
 #include <clc/geometric/distance.h>
 #include <clc/geometric/dot.h>
+#include <clc/geometric/fast_length.h>
 #include <clc/geometric/length.h>
 #include <clc/geometric/normalize.h>
 
diff --git a/libclc/generic/include/clc/geometric/fast_length.h b/libclc/generic/include/clc/geometric/fast_length.h
new file mode 100644
index 00000000000..2c7b80ac08f
--- /dev/null
+++ b/libclc/generic/include/clc/geometric/fast_length.h
@@ -0,0 +1,24 @@
+/*
+ * 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.
+ */
+
+#define __CLC_BODY <clc/geometric/fast_length.inc>
+#include <clc/geometric/floatn.inc>
diff --git a/libclc/generic/include/clc/geometric/fast_length.inc b/libclc/generic/include/clc/geometric/fast_length.inc
new file mode 100644
index 00000000000..5a7c275fa5f
--- /dev/null
+++ b/libclc/generic/include/clc/geometric/fast_length.inc
@@ -0,0 +1,23 @@
+/*
+ * 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_DECL __CLC_FLOAT fast_length(__CLC_FLOATN p0);
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
index d41974a2437..3f7db3d4eb4 100644
--- a/libclc/generic/lib/SOURCES
+++ b/libclc/generic/lib/SOURCES
@@ -36,6 +36,7 @@ common/step.cl
 geometric/cross.cl
 geometric/distance.cl
 geometric/dot.cl
+geometric/fast_length.cl
 geometric/length.cl
 geometric/normalize.cl
 integer/abs.cl
diff --git a/libclc/generic/lib/geometric/fast_length.cl b/libclc/generic/lib/geometric/fast_length.cl
new file mode 100644
index 00000000000..425dcf7c14b
--- /dev/null
+++ b/libclc/generic/lib/geometric/fast_length.cl
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2014 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>
+
+_CLC_OVERLOAD _CLC_DEF float fast_length(float p) {
+  return fabs(p);
+}
+
+_CLC_OVERLOAD _CLC_DEF float fast_length(float2 p) {
+  return half_sqrt(dot(p, p));
+}
+
+_CLC_OVERLOAD _CLC_DEF float fast_length(float3 p) {
+  return half_sqrt(dot(p, p));
+}
+
+_CLC_OVERLOAD _CLC_DEF float fast_length(float4 p) {
+  return half_sqrt(dot(p, p));
+}
+
+#ifdef cl_khr_fp64
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+
+_CLC_OVERLOAD _CLC_DEF double fast_length(double p) {
+  return fabs(p);
+}
+
+_CLC_OVERLOAD _CLC_DEF double fast_length(double2 p) {
+  return half_sqrt(dot(p, p));
+}
+
+_CLC_OVERLOAD _CLC_DEF double fast_length(double3 p) {
+  return half_sqrt(dot(p, p));
+}
+
+_CLC_OVERLOAD _CLC_DEF double fast_length(double4 p) {
+  return half_sqrt(dot(p, p));
+}
+
+#endif