--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/liboil/src/liboilfunction.c	Fri Apr 16 16:46:38 2010 +0300
@@ -0,0 +1,606 @@
+/*
+ * LIBOIL - Library of Optimized Inner Loops
+ * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
+ * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+//Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <liboil/liboildebug.h>
+#include <liboil/liboilcpu.h>
+#include <liboil/liboilfault.h>
+#include <liboil/liboiltest.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+
+/**
+ * SECTION:liboilclass-unstable
+ * @title:OilFunctionClass
+ * @short_description: Functions for manipulating function classes
+ *
+ * <para>
+ * Functions operate on arrays of data.  The arrays can be either source
+ * arrays (input only), destination arrays (output only), or in-place
+ * arrays (both input and output).
+ * </para>
+ *
+ * <para>
+ * The interpretation of a parameter can usually be determined from its
+ * name.  Parameters for arrays are of the form d1_1xn, where the first
+ * character represents the direction (source, destination, or in-place),
+ * the second represents the index for that particular direction, and
+ * the characters after the underscore indicate the size of the array.
+ * In this case, "1xn" represents an array that is 1 by N.  Note that
+ * the index and the size can both be omitted, giving a default of 1
+ * for the index and 1xn for the size.
+ * </para>
+ *
+ * <para>
+ * Parameters that represent strides are of the form "d1s".  The
+ * interpretation is similar to above, except that the s indicates
+ * a stride parameter.
+ * </para>
+ *
+ * <para>
+ * The exceptions to the above rule are "dest", "src", "dstr", "sstr", etc.
+ * These are aliases for "d1", "s1", "d1s", and "s1s", respectively.  This
+ * form is deprecated and will be removed in the 0.4 series.
+ * </para>
+ *
+ * <para>
+ * Two special parameters are "n" and "m", which determine the size of
+ * the arrays in other parameters.
+ * </para>
+ *
+ * <para>
+ * Data arrays are laid out such that rows are separated by the number
+ * of bytes given by the corresponding stride.  Elements in each row
+ * are contiguous.  If there is no stride parameter corresponding to an
+ * array, the rows of the array are contiguous.
+ * </para>
+ */
+
+/**
+ * SECTION:liboilimpl-unstable
+ * @title:OilFunctionImpl
+ * @short_description: Functions for manipulating function implementations.
+ */
+
+
+#ifndef __SYMBIAN32__
+extern OilFunctionClass *_oil_function_class_array[];
+extern OilFunctionImpl *_oil_function_impl_array[];
+#else
+extern OilFunctionClass** __oil_function_class_array(void);
+extern OilFunctionImpl** __oil_function_impl_array(void);
+#define _oil_function_class_array ((OilFunctionClass **)(__oil_function_class_array()))
+#define _oil_function_impl_array ((OilFunctionImpl **)(__oil_function_impl_array()))
+extern void init(void);
+extern void init_impl(void);
+#endif
+
+
+static int _oil_n_function_impls;
+static int _oil_n_function_classes;
+
+static void oil_init_pointers (void);
+static void oil_init_structs (void);
+
+static char * xstrdup (const char *s);
+
+void _oil_cpu_init (void);
+
+/**
+ * SECTION:liboilinit
+ * @title: Intialization
+ * @short_description: Initialization functions
+ */
+/**
+ * SECTION:liboilinit-unstable
+ * @title: Intialization
+ * @short_description: Initialization functions
+ */
+/**
+ * oil_init:
+ *
+ * Initialize liboil.  This function must be called before any
+ * other liboil function is used.  oil_init() may be called multiple
+ * times.
+ *
+ * Since: 0.3.0
+ */
+static int _oil_inited = 0;
+
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+oil_init (void)
+{
+
+  if (_oil_inited) return;
+  _oil_inited = 1;
+
+	#ifdef	__SYMBIAN32__
+  init();
+  init_impl();	
+  #endif
+  
+  srand(time(NULL));
+
+  _oil_debug_init ();
+  _oil_cpu_init ();
+  oil_init_pointers ();
+  oil_init_structs ();
+
+  oil_optimize_all ();
+
+  OIL_INFO ("oil_init() finished");
+}
+
+/**
+ * oil_init_no_optimize:
+ *
+ * Initialize liboil similar to oil_init(), but do not run the
+ * profiling stage.  This function is mainly useful for internal
+ * programs.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+oil_init_no_optimize (void)
+{
+  if (_oil_inited) return;
+  _oil_inited = 1;
+
+  srand(time(NULL));
+
+  _oil_debug_init ();
+  _oil_cpu_init ();
+  oil_init_pointers ();
+  oil_init_structs ();
+}
+
+/**
+ * oil_optimize_all:
+ *
+ * Optimize all function classes.
+ */
+ #ifdef __SYMBIAN32__
+EXPORT_C 
+#endif
+void
+oil_optimize_all (void)
+{
+  OilFunctionClass *klass;
+  int i;
+
+  oil_fault_check_enable ();
+  for (i = 0; i < _oil_n_function_classes; i++) {
+    klass = oil_class_get_by_index (i);
+
+    oil_class_optimize (klass);
+  }
+  OIL_INFO("%d classes, %d implementations, %d enabled",
+      _oil_n_function_classes, _oil_n_function_impls, 0);
+  oil_fault_check_disable ();
+}
+
+/**
+ * oil_optimize:
+ * @class_name: a string
+ *
+ * Optimize the function class that has the name specified by @class_name.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C 
+#endif
+void
+oil_optimize (const char *class_name)
+{
+  OilFunctionClass *klass;
+
+  klass = oil_class_get (class_name);
+  if (klass == NULL) {
+    OIL_ERROR ("could not find class %s", class_name);
+    return;
+  }
+
+  oil_class_optimize (klass);
+}
+
+/**
+ * oil_class_get_n_classes:
+ *
+ * Returns the number of function classes.
+ *
+ * Returns: the number of function classes
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+int
+oil_class_get_n_classes (void)
+{
+  return _oil_n_function_classes;
+}
+
+/**
+ * oil_class_get_by_index:
+ * @i: index
+ *
+ * Returns a pointer to the function class with index @i.
+ *
+ * Returns: an @OilFunctionClass
+ */
+ 
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif
+OilFunctionClass *
+oil_class_get_by_index (int i)
+{
+  if (i<0 || i>=_oil_n_function_classes) return NULL;
+
+  return _oil_function_class_array[i];
+}
+
+/**
+ * oil_impl_is_runnable:
+ * @impl: an @OilFunctionImpl
+ *
+ * Determines whether the function implementation given by @impl
+ * can be executed by the current CPU.
+ *
+ * Returns: 1 if the implementation can be executed, otherwise 0
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif 
+int
+oil_impl_is_runnable (OilFunctionImpl *impl)
+{
+  unsigned int oil_cpu_flags = oil_cpu_get_flags();
+
+  if ((impl->flags & OIL_CPU_FLAG_MASK) & (~oil_cpu_flags))
+    return 0;
+  return 1;
+}
+
+//#ifdef __SYMBIAN32__
+//EXPORT_C unsigned long _oil_cpu_flags()
+	//{
+	//return &oil_cpu_flags;
+	//}
+//#endif
+
+/**
+ * oil_impl_is_usable:
+ * @impl: an @OilFunctionImpl
+ *
+ * Determines whether the function implementation given by @impl
+ * is useful, that is, it can be executed on the current CPU and
+ * passes tests.
+ *
+ * Returns: 1 if the implementation can be used, otherwise 0
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif
+int
+oil_impl_is_usable (OilFunctionImpl *impl)
+{
+  unsigned int oil_cpu_flags = oil_cpu_get_flags();
+
+  if ((impl->flags & OIL_CPU_FLAG_MASK) & (~oil_cpu_flags))
+    return 0;
+  if (impl->flags & OIL_IMPL_FLAG_DISABLED)
+    return 0;
+  return 1;
+}
+
+/**
+ * oil_impl_get_by_index:
+ * @i: index
+ *
+ * Returns a pointer to the function implementation with index @i.
+ *
+ * Returns: a pointer to a function implementation structure
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif 
+OilFunctionImpl *
+oil_impl_get_by_index (int i)
+{
+  if (i<0 || i>=_oil_n_function_impls) return NULL;
+
+  return _oil_function_impl_array[i];
+}
+
+/**
+ * oil_class_get:
+ * @class_name: the name of the function class
+ *
+ * Returns a pointer to the function class that has the given class
+ * name.  If no such class is found, NULL is returned.
+ *
+ * Returns: a pointer to a function class
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif
+OilFunctionClass *
+oil_class_get (const char *class_name)
+{
+  OilFunctionClass *klass;
+  int i;
+
+  for (i = 0; i < _oil_n_function_classes; i++) {
+    klass = oil_class_get_by_index (i);
+
+    if (strcmp (klass->name, class_name) == 0)
+      return klass;
+  }
+  return NULL;
+}
+
+/**
+ * oil_class_choose_by_name:
+ * @klass: a function class
+ * @name: the name of an implementation
+ *
+ * Sets the chosen implementation for the given function class to
+ * the implementation with the given name.  If no implementation
+ * having the given name is found, the chosen implementation is
+ * not changed.
+ */
+ #ifdef __SYMBIAN32__
+EXPORT_C 
+#endif
+void
+oil_class_choose_by_name (OilFunctionClass * klass, const char *name)
+{
+  OilFunctionImpl *impl;
+
+  for(impl = klass->first_impl; impl; impl = impl->next) {
+    if (impl->name && strcmp (impl->name, name) == 0) {
+      klass->chosen_impl = impl;
+      klass->func = impl->func;
+      return;
+    }
+  }
+}
+
+/**
+ * oil_class_optimize:
+ * @klass: a function class
+ *
+ * Tests and profiles each implementation for the given function
+ * class.  Testing compares the output of running each implementation
+ * on random input against the reference implementation for the
+ * same input.
+ */
+#ifdef __SYMBIAN32__
+EXPORT_C  
+#endif
+void
+oil_class_optimize (OilFunctionClass * klass)
+{
+  OilFunctionImpl *impl;
+  OilFunctionImpl *min_impl;
+  OilTest *test;
+  int ret;
+
+  OIL_DEBUG ("optimizing class %s", klass->name);
+
+  if (klass->reference_impl == NULL) {
+    OIL_ERROR ("class %s has no reference implmentation", klass->name);
+    return;
+  }
+  if (klass->first_impl == NULL) {
+    OIL_ERROR ("class %s has no implmentations", klass->name);
+    return;
+  }
+
+  test = oil_test_new (klass);
+  if (test == NULL) {
+    OIL_ERROR ("failed to test function class %s", klass->name);
+    return;
+  }
+
+  min_impl = NULL;
+  for (impl = klass->first_impl; impl; impl = impl->next) {
+    OIL_LOG ("testing impl %s", impl->name);
+    if (!oil_impl_is_runnable (impl))
+      continue;
+
+    ret = oil_test_check_impl (test, impl);
+    if (ret) {
+      impl->profile_ave = test->profile_ave;
+      impl->profile_std = test->profile_std;
+      OIL_LOG ("impl %s ave=%g std=%g", impl->name, impl->profile_ave,
+          impl->profile_std);
+      if (min_impl == NULL) {
+        min_impl = impl;
+      } else {
+        if (impl->profile_ave < min_impl->profile_ave) {
+          min_impl = impl;
+        }
+      }
+    } else {
+      OIL_WARNING("disabling implementation %s", impl->name);
+      impl->profile_ave = test->profile_ave;
+      impl->profile_std = test->profile_std;
+      impl->flags |= OIL_IMPL_FLAG_DISABLED;
+    }
+  }
+  if (min_impl == NULL) {
+    OIL_ERROR ("failed to find optimal implementation for class %s",
+        klass->name);
+    return;
+  }
+
+  OIL_DEBUG("choosing implementation %s", min_impl->name);
+  klass->chosen_impl = min_impl;
+  klass->func = min_impl->func;
+
+  oil_test_free (test);
+}
+
+static void
+oil_init_pointers (void)
+{
+  int i;
+
+  for(i=0;_oil_function_class_array[i];i++) {
+    _oil_n_function_classes++;
+  }
+
+  for(i=0;_oil_function_impl_array[i];i++) {
+    _oil_n_function_impls++;
+  }
+
+}
+
+static void
+oil_init_structs (void)
+{
+  int i;
+  OilFunctionImpl *impl;
+
+  for (i = 0; i < _oil_n_function_impls; i++) {
+    impl = oil_impl_get_by_index (i);
+    OIL_LOG ("registering impl %p (%s)", impl,
+          (impl->name != NULL) ? impl->name : "NULL");
+    if (impl->klass == NULL) {
+      OIL_ERROR ("impl->klass is NULL for impl %p (%s)", impl,
+          (impl->name != NULL) ? impl->name : "NULL");
+      continue;
+    }
+    impl->next = impl->klass->first_impl;
+    impl->klass->first_impl = impl;
+    if (impl->flags & OIL_IMPL_FLAG_REF) {
+      impl->klass->reference_impl = impl;
+      impl->klass->chosen_impl = impl;
+      impl->klass->func = impl->func;
+    }
+  }
+}
+
+/**
+ * oil_class_register_impl_by_name:
+ * @klass_name: the name of the class
+ * @impl: an implementation
+ *
+ * Adds @impl to the list of implementations associated with
+ * the function class given by @klass_name.
+ */
+ #ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+oil_class_register_impl_by_name (const char *klass_name, OilFunctionImpl *impl)
+{
+  OilFunctionClass *klass;
+
+  klass = oil_class_get (klass_name);
+  if (klass == NULL) return;
+
+  oil_class_register_impl (klass, impl);
+}
+
+/**
+ * oil_class_register_impl:
+ * @klass: the class
+ * @impl: an implementation
+ *
+ * Adds @impl to the list of implementations associated with
+ * the function class given by @klass.
+ */
+ #ifdef __SYMBIAN32__
+EXPORT_C
+#endif
+void
+oil_class_register_impl (OilFunctionClass *klass, OilFunctionImpl *impl)
+{
+  impl->klass = klass;
+  impl->next = impl->klass->first_impl;
+  klass->first_impl = impl;
+  if (impl->flags & OIL_IMPL_FLAG_REF) {
+    impl->klass->reference_impl = impl;
+    impl->klass->chosen_impl = impl;
+    impl->klass->func = impl->func;
+  }
+}
+
+/**
+ * oil_class_register_impl_full:
+ * @klass: the class
+ * @func: the function
+ * @name: name of the function
+ * @flags: CPU flags
+ *
+ * Adds @func to the list of implementations associated with
+ * the function class given by @klass.
+ */
+ #ifdef __SYMBIAN32__
+EXPORT_C  
+#endif
+void
+oil_class_register_impl_full (OilFunctionClass *klass,
+    void (*func)(void), const char *name, unsigned int flags)
+{
+  OilFunctionImpl *impl;
+
+  impl = malloc(sizeof(OilFunctionImpl));
+  memset (impl, 0, sizeof(OilFunctionImpl));
+
+  impl->func = (void*)func;
+  impl->flags = flags;
+  impl->name = xstrdup(name);
+
+  oil_class_register_impl(klass,impl);
+}
+
+static char *
+xstrdup (const char *s)
+{
+  int n = strlen(s);
+  char *t;
+
+  n = strlen(s);
+  t = malloc(n + 1);
+  memcpy (t, s, n);
+  t[n] = 0;
+
+  return t;
+}
+