Implement fast_normalize builtin v4

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

v2:
  - Remove f suffix from constant in double implementations.
  - Consolidate implementations using the .cl/.inc approach.

v3:
 - Use __CLC_FPSIZE instead of __CLC_FP{32,64}

v4 (Jan Vesely):
 - Limit to single precision.

llvm-svn: 236920

7 files changed, 125 insertions, 0 deletions

diff --git a/libclc/generic/include/clc/clc.h b/libclc/generic/include/clc/clc.h
index 227adced2f8..9f1f75a4bd5 100644
--- a/libclc/generic/include/clc/clc.h
+++ b/libclc/generic/include/clc/clc.h
@@ -132,6 +132,7 @@
 #include <clc/geometric/dot.h>
 #include <clc/geometric/fast_distance.h>
 #include <clc/geometric/fast_length.h>
+#include <clc/geometric/fast_normalize.h>
 #include <clc/geometric/length.h>
 #include <clc/geometric/normalize.h>
 
diff --git a/libclc/generic/include/clc/geometric/fast_normalize.h b/libclc/generic/include/clc/geometric/fast_normalize.h
new file mode 100644
index 00000000000..c50b1c6661e
--- /dev/null
+++ b/libclc/generic/include/clc/geometric/fast_normalize.h
@@ -0,0 +1,26 @@
+/*
+ * 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_normalize.inc>
+#define __FLOAT_ONLY
+#include <clc/geometric/floatn.inc>
+#undef __FLOAT_ONLY
diff --git a/libclc/generic/include/clc/geometric/fast_normalize.inc b/libclc/generic/include/clc/geometric/fast_normalize.inc
new file mode 100644
index 00000000000..3ef8f8670a6
--- /dev/null
+++ b/libclc/generic/include/clc/geometric/fast_normalize.inc
@@ -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.
+ */
+
+
+_CLC_OVERLOAD _CLC_DECL __CLC_FLOATN fast_normalize(__CLC_FLOATN p);
diff --git a/libclc/generic/include/clc/geometric/floatn.inc b/libclc/generic/include/clc/geometric/floatn.inc
index fb7a9ae601c..fe5fba69ab4 100644
--- a/libclc/generic/include/clc/geometric/floatn.inc
+++ b/libclc/generic/include/clc/geometric/floatn.inc
@@ -1,8 +1,11 @@
 #define __CLC_FLOAT float
+#define __CLC_FPSIZE 32
 
 #define __CLC_FLOATN float
+#define __CLC_SCALAR
 #include __CLC_BODY
 #undef __CLC_FLOATN
+#undef __CLC_SCALAR
 
 #define __CLC_FLOATN float2
 #include __CLC_BODY
@@ -17,14 +20,19 @@
 #undef __CLC_FLOATN
 
 #undef __CLC_FLOAT
+#undef __CLC_FPSIZE
 
+#ifndef __FLOAT_ONLY
 #ifdef cl_khr_fp64
 
 #define __CLC_FLOAT double
+#define __CLC_FPSIZE 64
 
 #define __CLC_FLOATN double
+#define __CLC_SCALAR
 #include __CLC_BODY
 #undef __CLC_FLOATN
+#undef __CLC_SCALAR
 
 #define __CLC_FLOATN double2
 #include __CLC_BODY
@@ -39,7 +47,9 @@
 #undef __CLC_FLOATN
 
 #undef __CLC_FLOAT
+#undef __CLC_FPSIZE
 
 #endif
+#endif
 
 #undef __CLC_BODY
diff --git a/libclc/generic/lib/SOURCES b/libclc/generic/lib/SOURCES
index d4cb8b86b15..a05cceaead6 100644
--- a/libclc/generic/lib/SOURCES
+++ b/libclc/generic/lib/SOURCES
@@ -40,6 +40,7 @@ geometric/distance.cl
 geometric/dot.cl
 geometric/fast_distance.cl
 geometric/fast_length.cl
+geometric/fast_normalize.cl
 geometric/length.cl
 geometric/normalize.cl
 integer/abs.cl
diff --git a/libclc/generic/lib/geometric/fast_normalize.cl b/libclc/generic/lib/geometric/fast_normalize.cl
new file mode 100644
index 00000000000..af5f99434f7
--- /dev/null
+++ b/libclc/generic/lib/geometric/fast_normalize.cl
@@ -0,0 +1,32 @@
+/*
+ * 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>
+
+_CLC_OVERLOAD _CLC_DEF float fast_normalize(float p) {
+  return normalize(p);
+}
+
+#define __CLC_BODY <fast_normalize.inc>
+#define __FLOAT_ONLY
+#include <clc/geometric/floatn.inc>
+#undef __FLOAT_ONLY
diff --git a/libclc/generic/lib/geometric/fast_normalize.inc b/libclc/generic/lib/geometric/fast_normalize.inc
new file mode 100644
index 00000000000..c1be2b8b942
--- /dev/null
+++ b/libclc/generic/lib/geometric/fast_normalize.inc
@@ -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.
+ */
+
+#ifndef __CLC_SCALAR
+
+// Only handle vector implementations
+_CLC_OVERLOAD _CLC_DEF __CLC_FLOATN fast_normalize(__CLC_FLOATN p) {
+  __CLC_FLOAT l2 = dot(p, p);
+  return l2 == 0.0f ? p : p * half_rsqrt(l2);
+}
+
+#endif