[Libclc-dev] [PATCH 6/8] Fix implementation of normalize builtin

[Tom Stellard]

The new implementation was ported from the AMD builtin library
and has been tested with piglit, OpenCV, and the ocl conformance tests.
---
 generic/lib/geometric/normalize.cl  | 155 +++++++++++++++++++++++++++++++++++-
 generic/lib/geometric/normalize.inc |   3 -
 2 files changed, 152 insertions(+), 6 deletions(-)
 delete mode 100644 generic/lib/geometric/normalize.inc

diff --git a/generic/lib/geometric/normalize.cl b/generic/lib/geometric/normalize.cl
index b06b2fe..f61ac94 100644
--- a/generic/lib/geometric/normalize.cl
+++ b/generic/lib/geometric/normalize.cl
@@ -1,8 +1,157 @@
+/*
+ * 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 normalize(float p) {
+  return sign(p);
+}
+
+_CLC_OVERLOAD _CLC_DEF float2 normalize(float2 p) {
+  if (all(p == (float2)0.0F))
+    return p;
+
+  float l2 = dot(p, p);
+
+  if (l2 < FLT_MIN) {
+    p *= 0x1.0p+86F;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-65f;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((float2)0.0F, (float2)1.0F, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
+_CLC_OVERLOAD _CLC_DEF float3 normalize(float3 p) {
+  if (all(p == (float3)0.0F))
+    return p;
+
+  float l2 = dot(p, p);
+
+  if (l2 < FLT_MIN) {
+    p *= 0x1.0p+86F;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-66f;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((float3)0.0F, (float3)1.0F, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
+_CLC_OVERLOAD _CLC_DEF float4 normalize(float4 p) {
+  if (all(p == (float4)0.0F))
+    return p;
+
+  float l2 = dot(p, p);
+
+  if (l2 < FLT_MIN) {
+    p *= 0x1.0p+86F;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-66f;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((float4)0.0F, (float4)1.0F, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
 #ifdef cl_khr_fp64
+
 #pragma OPENCL EXTENSION cl_khr_fp64 : enable
-#endif
 
-#define __CLC_BODY <normalize.inc>
-#include <clc/geometric/floatn.inc>
+_CLC_OVERLOAD _CLC_DEF double normalize(double p) {
+  return sign(p);
+}
+
+_CLC_OVERLOAD _CLC_DEF double2 normalize(double2 p) {
+  if (all(p == (double2)0.0))
+    return p;
+
+  double l2 = dot(p, p);
+
+  if (l2 < DBL_MIN) {
+    p *= 0x1.0p+563;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-513;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((double2)0.0, (double2)1.0, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
+_CLC_OVERLOAD _CLC_DEF double3 normalize(double3 p) {
+  if (all(p == (double3)0.0))
+    return p;
+
+  double l2 = dot(p, p);
+
+  if (l2 < DBL_MIN) {
+    p *= 0x1.0p+563;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-514;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((double3)0.0, (double3)1.0, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
+_CLC_OVERLOAD _CLC_DEF double4 normalize(double4 p) {
+  if (all(p == (double4)0.0))
+    return p;
+
+  double l2 = dot(p, p);
+
+  if (l2 < DBL_MIN) {
+    p *= 0x1.0p+563;
+    l2 = dot(p, p);
+  } else if (l2 == INFINITY) {
+    p *= 0x1.0p-514;
+    l2 = dot(p, p);
+    if (l2 == INFINITY) {
+      p = copysign(select((double4)0.0, (double4)1.0, isinf(p)), p);
+      l2 = dot(p, p);
+    }
+  }
+  return p * rsqrt(l2);
+}
+
+#endif
diff --git a/generic/lib/geometric/normalize.inc b/generic/lib/geometric/normalize.inc
deleted file mode 100644
index 423ff79..0000000
--- a/generic/lib/geometric/normalize.inc
+++ /dev/null
@@ -1,3 +0,0 @@
-_CLC_OVERLOAD _CLC_DEF __CLC_FLOATN normalize(__CLC_FLOATN p) {
-  return p/length(p);
-}
-- 
2.0.4