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//
// Test_v3cross.cpp
// BulletTest
//
// Copyright (c) 2011 Apple Inc.
//
#include "LinearMath/btScalar.h"
#if defined(BT_USE_SSE_IN_API) || defined(BT_USE_NEON)
#include "Test_v3cross.h"
#include "vector.h"
#include "Utils.h"
#include "main.h"
#include <math.h>
#include <string.h>
#include <LinearMath/btVector3.h>
// reference code for testing purposes
static btVector3& v3cross_ref(btVector3& v1, btVector3& v2);
#define LOOPCOUNT 1024
#define NUM_CYCLES 1000
int Test_v3cross(void)
{
btVector3 v1, v2, v3;
float x, y, z, w;
// Init the data
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
w = BT_NAN; // w channel NaN
v1.setValue(x, y, z);
v1.setW(w);
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
v2.setValue(x, y, z);
v2.setW(w);
v3 = v1;
btVector3 correct_res, test_res;
{
float vNaN = BT_NAN;
correct_res.setValue(vNaN, vNaN, vNaN);
test_res.setValue(vNaN, vNaN, vNaN);
correct_res = v3cross_ref(v1, v2);
test_res = v3.cross(v2);
if (fabs(correct_res.m_floats[0] - test_res.m_floats[0]) +
fabs(correct_res.m_floats[1] - test_res.m_floats[1]) +
fabs(correct_res.m_floats[2] - test_res.m_floats[2]) >
FLT_EPSILON * 4)
{
vlog(
"Error - v3cross result error! "
"\ncorrect = (%10.4f, %10.4f, %10.4f) "
"\ntested = (%10.4f, %10.4f, %10.4f) \n",
correct_res.m_floats[0], correct_res.m_floats[1], correct_res.m_floats[2],
test_res.m_floats[0], test_res.m_floats[1], test_res.m_floats[2]);
return 1;
}
}
#define DATA_SIZE LOOPCOUNT
btVector3 vec3_arr1[DATA_SIZE];
btVector3 vec3_arr2[DATA_SIZE];
uint64_t scalarTime;
uint64_t vectorTime;
size_t j, k;
{
uint64_t startTime, bestTime, currentTime;
bestTime = -1LL;
scalarTime = 0;
for (j = 0; j < NUM_CYCLES; j++)
{
for (k = 0; k < DATA_SIZE; k++)
{
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
vec3_arr1[k].setValue(x, y, z);
vec3_arr1[k].setW(w);
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
vec3_arr2[k].setValue(x, y, z);
vec3_arr2[k].setW(w);
}
startTime = ReadTicks();
for (k = 0; k < LOOPCOUNT; k++)
{
vec3_arr1[k] = v3cross_ref(vec3_arr1[k], vec3_arr2[k]);
}
currentTime = ReadTicks() - startTime;
scalarTime += currentTime;
if (currentTime < bestTime)
bestTime = currentTime;
}
if (0 == gReportAverageTimes)
scalarTime = bestTime;
else
scalarTime /= NUM_CYCLES;
}
{
uint64_t startTime, bestTime, currentTime;
bestTime = -1LL;
vectorTime = 0;
for (j = 0; j < NUM_CYCLES; j++)
{
for (k = 0; k < DATA_SIZE; k++)
{
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
vec3_arr1[k].setValue(x, y, z);
vec3_arr1[k].setW(w);
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
vec3_arr2[k].setValue(x, y, z);
vec3_arr2[k].setW(w);
}
startTime = ReadTicks();
for (k = 0; k < LOOPCOUNT; k++)
{
vec3_arr1[k] = vec3_arr1[k].cross(vec3_arr2[k]);
}
currentTime = ReadTicks() - startTime;
vectorTime += currentTime;
if (currentTime < bestTime)
bestTime = currentTime;
}
if (0 == gReportAverageTimes)
vectorTime = bestTime;
else
vectorTime /= NUM_CYCLES;
}
vlog("Timing:\n");
vlog(" \t scalar\t vector\n");
vlog(" \t%10.4f\t%10.4f\n", TicksToCycles(scalarTime) / LOOPCOUNT,
TicksToCycles(vectorTime) / LOOPCOUNT);
return 0;
}
static btVector3& v3cross_ref(btVector3& v1, btVector3& v2)
{
btScalar x, y, z;
x = v1.m_floats[1] * v2.m_floats[2] - v1.m_floats[2] * v2.m_floats[1];
y = v1.m_floats[2] * v2.m_floats[0] - v1.m_floats[0] * v2.m_floats[2];
z = v1.m_floats[0] * v2.m_floats[1] - v1.m_floats[1] * v2.m_floats[0];
v1.m_floats[0] = x;
v1.m_floats[1] = y;
v1.m_floats[2] = z;
return v1;
}
#endif //BT_USE_SSE
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