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//
// Test_qtdot.cpp
// BulletTest
//
// Copyright (c) 2011 Apple Inc.
//
#include "LinearMath/btScalar.h"
#if defined(BT_USE_SSE_IN_API) || defined(BT_USE_NEON)
#include "Test_qtdot.h"
#include "vector.h"
#include "Utils.h"
#include "main.h"
#include <math.h>
#include <string.h>
#include <LinearMath/btQuaternion.h>
#define BT_OP(a, b) (a.dot(b))
// reference code for testing purposes
static inline btScalar qtdot_ref(btQuaternion& q1, btQuaternion& q2);
static inline btScalar qtdot_ref(btQuaternion& q1, btQuaternion& q2)
{
return q1.x() * q2.x() +
q1.y() * q2.y() +
q1.z() * q2.z() +
q1.w() * q2.w();
}
#define LOOPCOUNT 1024
#define NUM_CYCLES 1000
int Test_qtdot(void)
{
btQuaternion q1, q2;
float x, y, z, w, vNaN;
vNaN = BT_NAN; // w channel NaN
// Init the data
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
w = RANDF_01;
q1.setValue(x, y, z, w);
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
w = RANDF_01;
q2.setValue(x, y, z, w);
btScalar correct_res, test_res;
{
correct_res = vNaN;
test_res = vNaN;
correct_res = qtdot_ref(q1, q2);
test_res = BT_OP(q1, q2);
if (fabsf(correct_res - test_res) > FLT_EPSILON * 4)
{
vlog(
"Error - qtdot result error! "
"\ncorrect = %10.4f "
"\ntested = %10.4f \n",
correct_res, test_res);
return 1;
}
}
#define DATA_SIZE LOOPCOUNT
btQuaternion qt_arr1[DATA_SIZE];
btQuaternion qt_arr2[DATA_SIZE];
btScalar res_arr[DATA_SIZE];
uint64_t scalarTime;
uint64_t vectorTime;
size_t j, k;
for (k = 0; k < DATA_SIZE; k++)
{
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
w = RANDF_01;
qt_arr1[k].setValue(x, y, z, w);
x = RANDF_01;
y = RANDF_01;
z = RANDF_01;
w = RANDF_01;
qt_arr2[k].setValue(x, y, z, w);
}
{
uint64_t startTime, bestTime, currentTime;
bestTime = -1LL;
scalarTime = 0;
for (j = 0; j < NUM_CYCLES; j++)
{
startTime = ReadTicks();
for (k = 0; k + 4 <= LOOPCOUNT; k += 4)
{
size_t km = (k & (DATA_SIZE - 1));
res_arr[km] = qtdot_ref(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = qtdot_ref(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = qtdot_ref(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = qtdot_ref(qt_arr1[km], qt_arr2[km]);
}
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++)
{
startTime = ReadTicks();
for (k = 0; k + 4 <= LOOPCOUNT; k += 4)
{
size_t km = (k & (DATA_SIZE - 1));
res_arr[km] = BT_OP(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = BT_OP(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = BT_OP(qt_arr1[km], qt_arr2[km]);
km++;
res_arr[km] = BT_OP(qt_arr1[km], qt_arr2[km]);
km++;
}
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;
}
#endif //BT_USE_SSE
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