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/*-------------------------------------------------------------------------
* drawElements Base Portability Library
* -------------------------------------
*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*//*!
* \file
* \brief Testing of deInt32 functions.
*//*--------------------------------------------------------------------*/
#include "deInt32.h"
#include "deRandom.h"
#include <stdio.h> /* printf() */
DE_BEGIN_EXTERN_C
void deInt32_computeLUTs (void)
{
enum
{
RCP_LUT_BITS = 8
};
int ndx;
printf("enum { RCP_LUT_BITS = %d };\n", RCP_LUT_BITS);
printf("static const deUint32 s_rcpLUT[1<<RCP_LUT_BITS] =\n");
printf("{\n");
for (ndx = 0; ndx < (1<<RCP_LUT_BITS); ndx++)
{
deUint32 val = (1u << RCP_LUT_BITS) | (deUint32)ndx;
deUint32 rcp = (deUint32)((1u << DE_RCP_FRAC_BITS) / ((double)val / (1<<RCP_LUT_BITS)));
if ((ndx & 3) == 0)
printf("\t");
printf("0x%08x", rcp);
if ((ndx & 3) == 3)
{
if (ndx != (1<<RCP_LUT_BITS)-1)
printf(",");
printf("\n");
}
else
printf(", ");
}
printf("};\n");
}
void deInt32_selfTest (void)
{
const int NUM_ACCURATE_BITS = 29;
deRandom rnd;
deUint32 rcp;
int exp;
int numBits;
deRandom_init(&rnd, 0xdeadbeefu-1);
/* Test deClz32(). */
{
int i;
for (i = 0; i < 32; i++)
{
DE_TEST_ASSERT(deClz32(1u << i) == 31-i);
DE_TEST_ASSERT(deClz32((1u << i) | ((1u << i)-1u)) == 31-i);
}
}
DE_TEST_ASSERT(deClz32(0) == 32);
DE_TEST_ASSERT(deClz32(1) == 31);
DE_TEST_ASSERT(deClz32(0xF1) == 24);
DE_TEST_ASSERT(deClz32(0xBC12) == 16);
DE_TEST_ASSERT(deClz32(0xABBACD) == 8);
DE_TEST_ASSERT(deClz32(0x10000000) == 3);
DE_TEST_ASSERT(deClz32(0x20000000) == 2);
DE_TEST_ASSERT(deClz32(0x40000000) == 1);
DE_TEST_ASSERT(deClz32(0x80000000) == 0);
/* Test deCtz32(). */
{
int i;
for (i = 0; i < 32; i++)
{
DE_TEST_ASSERT(deCtz32(1u << i) == i);
DE_TEST_ASSERT(deCtz32(~((1u << i)-1u)) == i);
}
}
DE_TEST_ASSERT(deCtz32(0) == 32);
DE_TEST_ASSERT(deCtz32(1) == 0);
DE_TEST_ASSERT(deCtz32(0x3F4) == 2);
DE_TEST_ASSERT(deCtz32(0x3F40) == 6);
DE_TEST_ASSERT(deCtz32(0xFFFFFFFF) == 0);
/* Test simple inputs for dePop32(). */
DE_TEST_ASSERT(dePop32(0u) == 0);
DE_TEST_ASSERT(dePop32(~0u) == 32);
DE_TEST_ASSERT(dePop32(0xFF) == 8);
DE_TEST_ASSERT(dePop32(0xFF00FF) == 16);
DE_TEST_ASSERT(dePop32(0x3333333) == 14);
DE_TEST_ASSERT(dePop32(0x33333333) == 16);
/* dePop32(): Check exp2(N) values and inverses. */
for (numBits = 0; numBits < 32; numBits++)
{
DE_TEST_ASSERT(dePop32(1u<<numBits) == 1);
DE_TEST_ASSERT(dePop32(~(1u<<numBits)) == 31);
}
/* Check exp2(N) values. */
for (numBits = 0; numBits < 32; numBits++)
{
deUint32 val = (1u<<numBits);
deRcp32(val, &rcp, &exp);
DE_TEST_ASSERT(rcp == (1u<<DE_RCP_FRAC_BITS));
DE_TEST_ASSERT(exp == numBits);
}
/* Check random values. */
for (numBits = 0; numBits < 32; numBits++)
{
int NUM_ITERS = deMax32(16, 1 << (numBits/2));
int iter;
for (iter = 0; iter < NUM_ITERS; iter++)
{
const deUint32 EPS = 1u << (DE_RCP_FRAC_BITS - NUM_ACCURATE_BITS);
deUint32 val = (deRandom_getUint32(&rnd) & ((1u<<numBits)-1)) | (1u<<numBits);
deUint32 ref = (deUint32)(((1.0f / (double)val) * (double)(1<<DE_RCP_FRAC_BITS)) * (double)(1u<<numBits));
deRcp32(val, &rcp, &exp);
DE_TEST_ASSERT(rcp >= ref-EPS && rcp < ref+EPS);
DE_TEST_ASSERT(exp == numBits);
}
}
DE_TEST_ASSERT(deBitMask32(0, 0) == 0);
DE_TEST_ASSERT(deBitMask32(8, 0) == 0);
DE_TEST_ASSERT(deBitMask32(16, 0) == 0);
DE_TEST_ASSERT(deBitMask32(31, 0) == 0);
DE_TEST_ASSERT(deBitMask32(32, 0) == 0);
DE_TEST_ASSERT(deBitMask32(0, 2) == 3);
DE_TEST_ASSERT(deBitMask32(0, 32) == 0xFFFFFFFFu);
DE_TEST_ASSERT(deBitMask32(16, 16) == 0xFFFF0000u);
DE_TEST_ASSERT(deBitMask32(31, 1) == 0x80000000u);
DE_TEST_ASSERT(deBitMask32(8, 4) == 0xF00u);
DE_TEST_ASSERT(deUintMaxValue32(1) == 1);
DE_TEST_ASSERT(deUintMaxValue32(2) == 3);
DE_TEST_ASSERT(deUintMaxValue32(32) == 0xFFFFFFFFu);
DE_TEST_ASSERT(deIntMaxValue32(1) == 0);
DE_TEST_ASSERT(deIntMaxValue32(2) == 1);
DE_TEST_ASSERT(deIntMaxValue32(32) == 0x7FFFFFFF);
DE_TEST_ASSERT(deIntMinValue32(1) == -1);
DE_TEST_ASSERT(deIntMinValue32(2) == -2);
DE_TEST_ASSERT(deIntMinValue32(32) == -0x7FFFFFFF - 1);
DE_TEST_ASSERT(deSignExtendTo32((int)0x0, 1) == 0);
DE_TEST_ASSERT(deSignExtendTo32((int)0x1, 1) == (int)0xFFFFFFFF);
DE_TEST_ASSERT(deSignExtendTo32((int)0x3, 3) == 3);
DE_TEST_ASSERT(deSignExtendTo32((int)0x6, 3) == (int)0xFFFFFFFE);
DE_TEST_ASSERT(deSignExtendTo32((int)0x3, 4) == 3);
DE_TEST_ASSERT(deSignExtendTo32((int)0xC, 4) == (int)0xFFFFFFFC);
DE_TEST_ASSERT(deSignExtendTo32((int)0x7FC3, 16) == (int)0x7FC3);
DE_TEST_ASSERT(deSignExtendTo32((int)0x84A0, 16) == (int)0xFFFF84A0);
DE_TEST_ASSERT(deSignExtendTo32((int)0xFFC3, 17) == (int)0xFFC3);
DE_TEST_ASSERT(deSignExtendTo32((int)0x184A0, 17) == (int)0xFFFF84A0);
DE_TEST_ASSERT(deSignExtendTo32((int)0x7A016601, 32) == (int)0x7A016601);
DE_TEST_ASSERT(deSignExtendTo32((int)0x8A016601, 32) == (int)0x8A016601);
DE_TEST_ASSERT(deReverseBytes32(0x11223344) == 0x44332211);
DE_TEST_ASSERT(deReverseBytes32(0xfecddeef) == 0xefdecdfe);
DE_TEST_ASSERT(deReverseBytes16(0x1122) == 0x2211);
DE_TEST_ASSERT(deReverseBytes16(0xdeef) == 0xefde);
DE_TEST_ASSERT(deInt64InInt32Range((deInt64)0x7FFFFFF));
DE_TEST_ASSERT(deInt64InInt32Range(0));
DE_TEST_ASSERT(deInt64InInt32Range(1));
DE_TEST_ASSERT(deInt64InInt32Range(-1));
DE_TEST_ASSERT(deInt64InInt32Range(-((deInt64)0x7FFFFFF)));
DE_TEST_ASSERT(deInt64InInt32Range(-((deInt64)0x8000 << 16)));
DE_TEST_ASSERT(deInt64InInt32Range((deInt64)deIntMinValue32(32)));
DE_TEST_ASSERT(!deInt64InInt32Range((((deInt64)0x7FFFFFF) << 32) | (deInt64)0xFFFFFFFF));
DE_TEST_ASSERT(!deInt64InInt32Range((deInt64)0x7FFFFFFF + 1));
DE_TEST_ASSERT(!deInt64InInt32Range(-((deInt64)0x7FFFFFFF + 2)));
DE_TEST_ASSERT(!deInt64InInt32Range(-((((deInt64)0x7FFFFFF) << 32) | (deInt64)0xFFFFFFFF)));
DE_TEST_ASSERT(!deInt64InInt32Range((deInt64)deIntMinValue32(32) - 1));
}
DE_END_EXTERN_C