我的linux版本是4.19.0-6-amd64#1 SMP Debian 4.19.67-2+deb10u1(2019-09-20(x86_64 GNU/linux我的gcc版本是8.3.0我想用引脚3.5编译并运行Sniper 7.2。我正试图根据这篇帖子编译基准：https://groups.google.com/d/msg/snipersim/2yL2x6nNfVs/EmqQlVf6EwAJ
但是我得到了这个错误：
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:121:24: error: ‘int pow(double, int)’ conflicts with a previous declaration int pow(double a, int n) {
^
In file included from /usr/include/c++/8/math.h:36,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTInclude.hxx:18,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTVec.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTBox.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:3:
/usr/include/c++/8/cmath:399:3: note: previous declaration ‘double std::pow(double, int)’ pow(double __x, int __i)
^~~
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:143:39: error: call of overloaded ‘pow(double, int)’ is ambiguous
if (v.minIndex() != 1 || dv != pow(convert<DataType>(11), N)) {
~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/features.h:424,
from /usr/include/time.h:25,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:140:1: note: candidate: ‘double pow(double, double)’
__MATHCALL_VEC (pow,, (_Mdouble_ __x, _Mdouble_ __y));
^~~~~~~~~~~~~~
我尝试了stackflow和其他人的建议，甚至是报告文件中的注释，但没有任何变化。我发现pow((函数应该像int pow(int a，int n(或double pow(double a，double n(，但在TestRVec.cxx中减速是完全错误的。TestRTVec.cc似乎是由makefile构建的，然后进行编译，因为它不在snipper_benchmark.tar文件中，所以我对此无能为力。我的观察是真的吗？我该怎么办？？
我在下面的make报告中发布了一些先前的行：
cd /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL && /usr/bin/g++ -std=gnu++98 -DTHIS_IS_CMAKE -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/include -O3 -funroll-loops -fprefetch-loop-arrays -fpermissive -fno-exceptions -static-libgcc -Wl,--hash-style=both,--as-needed -DPARSEC_VERSION=2.1 -DENABLE_PARSEC_HOOKS -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/hooks/inst/amd64-linux.gcc-sniper/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/tools/hooks -I/home/ahmad/sniper-latest/sniper-7.2/include -fexceptions -fno-strict-aliasing -fno-align-labels -DNDEBUG -D_MM_NO_ALIGN_CHECK -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/BVH -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/SG -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/LRT/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/LRT -D__ahmad__ -o CMakeFiles/test_rtvec.dir/test/TestRTVec/TestRTVec.o -c /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx
整个错误部分是这样的：
cd /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL && /usr/bin/g++ -std=gnu++98 -DTHIS_IS_CMAKE -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/include -O3 -funroll-loops -fprefetch-loop-arrays -fpermissive -fno-exceptions -static-libgcc -Wl,--hash-style=both,--as-needed -DPARSEC_VERSION=2.1 -DENABLE_PARSEC_HOOKS -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/hooks/inst/amd64-linux.gcc-sniper/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/tools/hooks -I/home/ahmad/sniper-latest/sniper-7.2/include -fexceptions -fno-strict-aliasing -fno-align-labels -DNDEBUG -D_MM_NO_ALIGN_CHECK -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/BVH -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/SG -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/LRT/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/LRT -D__ahmad__ -o CMakeFiles/test_rtvec.dir/test/TestRTVec/TestRTVec.o -c /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:121:24: error: ‘int pow(double, int)’ conflicts with a previous declaration
int pow(double a, int n) {
^
In file included from /usr/include/c++/8/math.h:36,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTInclude.hxx:18,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTVec.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTBox.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:3:
/usr/include/c++/8/cmath:399:3: note: previous declaration ‘double std::pow(double, int)’
pow(double __x, int __i)
^~~
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx: In instantiation of ‘void testbox() [with int N = 8; DataType = double]’:
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:317:24: required from here
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:143:39: error: call of overloaded ‘pow(double, int)’ is ambiguous
if (v.minIndex() != 1 || dv != pow(convert<DataType>(11), N)) {
~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/features.h:424,
from /usr/include/time.h:25,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:140:1: note: candidate: ‘double pow(double, double)’
__MATHCALL_VEC (pow,, (_Mdouble_ __x, _Mdouble_ __y));
^~~~~~~~~~~~~~
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:114:5: note: candidate: ‘int pow(int, int)’
int pow(int a, int n) {
^~~
/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:121:5: note: candidate: ‘int pow(double, int)’
int pow(double a, int n) {
^~~
In file included from /usr/include/c++/8/math.h:36,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTInclude.hxx:18,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTVec.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/common/RTBox.hxx:4,
from /home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper/RTTL/test/TestRTVec/TestRTVec.cxx:3:
/usr/include/c++/8/cmath:415:5: note: candidate: ‘typename __gnu_cxx::__promote_2<_Tp, _Up>::__type std::pow(_Tp, _Up) [with _Tp = double; _Up = int; typename __gnu_cxx::__promote_2<_Tp, _Up>::__type = double]’
pow(_Tp __x, _Up __y)
^~~
/usr/include/c++/8/cmath:407:3: note: candidate: ‘long double std::pow(long double, int)’
pow(long double __x, int __n)
^~~
/usr/include/c++/8/cmath:403:3: note: candidate: ‘float std::pow(float, int)’
pow(float __x, int __n)
^~~
/usr/include/c++/8/cmath:399:3: note: candidate: ‘double std::pow(double, int)’
pow(double __x, int __i)
^~~
/usr/include/c++/8/cmath:392:3: note: candidate: ‘long double std::pow(long double, long double)’
pow(long double __x, long double __y)
^~~
/usr/include/c++/8/cmath:388:3: note: candidate: ‘float std::pow(float, float)’
pow(float __x, float __y)
^~~
make[4]: *** [RTTL/CMakeFiles/test_rtvec.dir/build.make:56: RTTL/CMakeFiles/test_rtvec.dir/test/TestRTVec/TestRTVec.o] Error 1
make[4]: Leaving directory '/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper'
make[3]: *** [CMakeFiles/Makefile2:224: RTTL/CMakeFiles/test_rtvec.dir/all] Error 2
make[3]: Leaving directory '/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper'
make[2]: *** [Makefile:114: all] Error 2
make[2]: Leaving directory '/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/apps/raytrace/obj/amd64-linux.gcc-sniper'
[PARSEC] Error: 'env CXXFLAGS=-I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/include -O3 -funroll-loops -fprefetch-loop-arrays -fpermissive -fno-exceptions -static-libgcc -Wl,--hash-style=both,--as-needed -DPARSEC_VERSION=2.1 -DENABLE_PARSEC_HOOKS -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/hooks/inst/amd64-linux.gcc-sniper/include -I/home/ahmad/sniper-latest/sniper-7.2/benchmarks/tools/hooks -I/home/ahmad/sniper-latest/sniper-7.2/include -fexceptions -fno-strict-aliasing -fno-align-labels -DNDEBUG -D_MM_NO_ALIGN_CHECK LDFLAGS=-L/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/mesa/inst/amd64-linux.gcc-sniper/lib -L/usr/lib64 -L/usr/lib -L/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec/parsec-2.1/pkgs/libs/hooks/inst/amd64-linux.gcc-sniper/lib -uparmacs_roi_end -uparmacs_roi_start -L/home/ahmad/sniper-latest/sniper-7.2/benchmarks/tools/hooks -lhooks_base -lrt -pthread LIBS= -lhooks -lXmu -lX11 -lGL -lGLU -lpthread /usr/bin/make' failed.
make[1]: *** [Makefile:31: parsec-build] Error 1
make[1]: Leaving directory '/home/ahmad/sniper-latest/sniper-7.2/benchmarks/parsec'
make: *** [Makefile:14: all] Error 2
整个代码文件是这样的：
#include <time.h>
#include "RTTL/common/RTBox.hxx"
#include "RTTL/common/Timer.hxx"
using namespace RTTL;
template<int N, typename DataType>
void randomize(RTVec_t<N, DataType>& v, float scale = 1) {
for (int i = 0; i < v.nElements(); i++)
v[i] = DataType(scale * rand()/float(RAND_MAX));
}
template<int N>
void randomize(RTVec_t<N, sse_f>& v, float scale = 1) {
float* f = (float*)&v;
for (int i = 0; i < 4*v.nElements(); i++)
f[i] = float(scale * rand()/float(RAND_MAX));
}
template<int N>
void randomize(RTVec_t<N, sse_i>& v, float scale = 1) {
int* f = (int*)&v;
for (int i = 0; i < 4*v.nElements(); i++)
f[i] = int(scale * rand()/float(RAND_MAX));
}
// Elementary types
template<int N, typename DataType>
void test() {
typedef RTVec_t<N, DataType> rtvec;
DataType eps = epsilon<DataType>();
rtvec a(1);
rtvec b(2);
rtvec c(3);
rtvec d(4);
DataType q = 14;
rtvec dif = q*a - b - c*d; // should be ~0
if (dif.absMaximum() != 0) {
cout << "err101 = " << dif << ";" << endl;
//exit(101);
}
c += 1; // operator+=(const DataType q)
if (d != c) {
cout << "err102 = " << c << ";" << endl;
//exit(102);
}
const float scale = 100;
randomize(a, scale);
randomize(b, scale);
randomize(c, scale);
d = (a+b)*c - (a*c + b*c);
if (d.absMaximum() > 30 * N * scale * eps) {
// Could happen (rather infrequently but still)
cout << "err103 = " << d << ";" << endl;
//exit(103);
}
DataType e[] = {8,1,2,3,4,5,6,7,8,9,10};
a = 2;
a *= 2;
a -= e;
rtvec tt(e);
a += rtvec(5);
if (a.maximum() != ((rtvec&)e).maximum() || a.minimum() != ((rtvec&)e).minimum()) {
cout << "err104 = " << a << ";" << endl;
//exit(104);
}
}
// SSE types (also works for int/floats!)
template<int N, typename DataType>
void test4() {
typedef RTVec_t<N, DataType> rtvec;
DataType eps = epsilon<DataType>();
rtvec a(convert<DataType>(1));
rtvec b(convert<DataType>(2));
rtvec c(convert<DataType>(3));
rtvec d(convert<DataType>(4));
DataType q = convert<DataType>(14);
rtvec dif = q*a - b - c*d; // should be ~0
if (dif.absMaximum() != convert<DataType>(0)) {
cout << "err201 = " << dif << ";" << endl;
//exit(201);
}
c += convert<DataType>(1); // operator+=(const DataType q)
if (d != c) {
cout << "err202 = " << c << ";" << endl;
//exit(202);
}
#define scale 100
randomize(a, scale);
randomize(b, scale);
randomize(c, scale);
d = (a+b)*c - (a*c + b*c);
DataType dam = d.absMaximum();
if (!(30 * N * scale * eps >= dam)) {
cout << "err203 = " << d << ";" << endl;
//exit(203);
}
}
int pow(int a, int n) {
// versions for float/double are defined in stdlib.
int r = a;
for (int i = 1; i < n; i++) r *= a;
return r;
}
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
int pow(double a, int n) {
return pow(a, (double)n);
}
#endif
template<int N, typename DataType>
void testbox() {
typedef RTVec_t<N, DataType> rtvec;
typedef RTBox_t<N, DataType> rtbox;
rtbox a;
a[0] = rtvec(2);
a[1] = rtvec(12);
rtbox b(rtvec(1), rtvec(10));
rtbox d = a + b;
rtbox e = a - b;
if (d.sides().minimum() != 11 || e.center().maximum() != 6) {
cout << "err301 = " << a << ";" << endl;
//exit(301);
}
DataType dv = d.volume();
d[1][0] = 20;
rtvec v = d.sides();
if (v.minIndex() != 1 || dv != pow(convert<DataType>(11), N)) {
cout << "err302 = " << d << ";" << endl;
//exit(302);
}
}
template<int N, typename DataType>
void testbox4() {
typedef RTVec_t<N, DataType> rtvec;
typedef RTBox_t<N, DataType> rtbox;
rtbox a;
a[0] = rtvec(convert<DataType>(2));
a[1] = rtvec(convert<DataType>(12));
rtbox b(rtvec(convert<DataType>(1)), rtvec(convert<DataType>(10)));
rtbox d = a + b;
rtbox e = a - b;
if (d.sides().minimum() != 11 || e.center().maximum() != 6) {
cout << "err303 = " << a << ";" << endl;
//exit(303);
}
}
#include "RTTL/common/RTcoutRedirect.hxx"
int main() {
Timer timer; timer.start();
unsigned int seed = (unsigned int)(CLOCKS_PER_SEC*unsigned(time(NULL)));
srand(seed);
cout << "seed = " << seed << ";" << endl;
// Check if alignment is working...
int align0 = __alignof(RTData_t<3, float, 0>::AlignedDataType) ;
int alignx = __alignof(RTData_t<3, float, 16>::AlignedDataType);
if (align0 != __alignof(float) || alignx != __alignof(sse_f)) {
cout << "err00 = " << align0 << " vs " << alignx << endl;
//exit(1);
}
RTVec_t<4, float, 16> a(0.0f);
int aa = __alignof(a);
a.entry(1) = 1; // default cast (to float&)
a.entry<float>(2) = 2; // explicit cast
a.entry<float>(3) = 3;
// Different overloads for 'const' attribute (same behavior)
//const
_ALIGN(16) float a0[] = {0,1,2,3};
if (a != (RTVec_t<4, float, 16>&)a0) { // using cast
cout << "err01 = " << a << ";" << endl;
//exit(1);
}
if (a != a0) {
cout << "err021 = " << a << ";" << endl;
//exit(21);
}
if (a == *a0) { // operator==
cout << "err022 = " << a << ";" << endl;
//exit(22);
}
RTVec_t<4, float, 16> b;
b = 3.0f;
if (b != a0[3]) { // operator!=
cout << "err023 = " << a << ";" << endl;
//exit(23);
}
// Mixed operands and casts.
float* bv = b.pointer<float>();
bv[0] = 1;
bv[1] = 2;
bv[2] = 3;
bv[3] = 4;
if (a == b) { // comparing RTVec_t<4, float, 16>
cout << "err03 = " << a << ";" << endl;
//exit(3);
}
if (a != b - 1) {
cout << "err04 = " << a << ";" << endl;
//exit(4);
}
if (a != b - 1.0f) {
cout << "err05 = " << a << ";" << endl;
//exit(5);
}
RTVec_t<1, sse_f> asse;
asse = convert(3.0f, 2.0f, 1.0f, 0.0f); // _mm_set_ps
if (asse != a.entry<sse_f>()) {
cout << "err06 = " << asse << ";" << endl;
//exit(6);
}
// Access individual floats in sse_f vector.
asse.entry<float>(1) = 5;
if (asse != convert(3.0f, 2.0f, 5.0f, 0.0f)) {
cout << "err07 = " << asse << ";" << endl;
//exit(7);
}
// Difference between cast and convert.
RTVec_t<1, sse_i> assei;
assei = convert(3, 2, 5, 0);
if (assei[0] != convert(asse[0])) {
cout << "err081 = " << assei << ";" << endl;
//exit(81);
}
if (assei[0] == cast(asse[0])) {
cout << "err082 = " << assei << ";" << endl;
//exit(82);
}
// Check different sizes and data types.
test<5, float>();
//#if 0
test<6, float>();
test<8, float>();
test<5, int>();
test<6, int>();
test<8, int>();
test<5, double>();
test<6, double>();
test<8, double>();
test4<16, int>();
test4<16, float>();
test4<16, sse_f>();
// Specialized instances.
test<2, int>();
test<3, float>();
test<4, char>();
test4<3, sse_f>();
#if !defined(__GNUC__) || defined(__INTEL_COMPILER)
_ALIGN(16) float ef[] = {4,3,2,1, 8,7,6,5, 11,10,9,8};
sse_f* e = (sse_f*)ef;
RTVec_t<3, sse_f> a4;
a4 = RTVec_t<3, sse_f>(convert(2.0f)); // fine without template parameter
a4 *= convert<sse_f>(4); // need one
a4 -= e;
sse_f ama = a4.maximum();
sse_f ami = a4.minimum();
sse_f adi = ama - ami;
if (adi != 7) {
cout << "err09 = " << a4 << ";" << endl;
//exit(9);
}
#endif
RTVec_t<4, float, 16> at0(1.0f);
RTVec_t<3, float> at1(1.0f);
RTVec_t<4, float, 16> at2(1.0f);
// Vectors of different size are always not equal.
if (at1 == at0) {
cout << "err10 = " << at0 << ";" << endl;
//exit(10);
}
// The same size.
if (at2 != at0) {
cout << "err11 = " << at0 << ";" << endl;
//exit(11);
}
test4<4, float>();
test4<4, sse_f>();
test4<4, sse_i>();
testbox<2, float>();
testbox<3, int>();
testbox<4, float>();
testbox<8, double>();
testbox4<1, sse_f>();
RTBox_t<3, float, 16> b3;
_ALIGN(16) float b31[] = {1,2,3};
b3.m_min = (RTVec_t<3, float, 16>&)b31;
_ALIGN(16) float b32[] = {3,6,5};
b3.m_max = (RTVec_t<3, float, 16>&)b32;
int b3i = b3.maxIndex();
float b3ar = b3.area();
float b3vol = b3.volume();
if (b3i != 1 || b3ar != 40 || b3vol != 16) {
cout << "err12 = " << b3 << ";" << endl;
//exit(12);
}
RTBox_t<1, sse_f> b4;
b4[0] = _mm_set_ps(1,2,3,4);
b4[1] = _mm_set_ps(5,5,6,6);
b4[0].entry<float>(3) = 2;
sse_f bs = b4.sides()[0];
RTBox_t<4, float>& bf = (RTBox_t<4, float>&)b4;
float bfv = bf.volume();
if (bfv != 54) {
cout << "err13 = " << b4 << ";" << endl;
//exit(13);
}
#if 0
RTBox3a b3a;
b3a[0] = _mm_set_ps(-1,3,2,1);
b3a[1] = _mm_set_ps(-1,5,4,3);
float b3av = b3a.volume();
float b3aa = b3a.area();
if (b3av != 8 || b3aa != 24) {
cout << "err14 = " << b3a << ";" << endl;
//exit(14);
}
#else
cout << "WARNING: as layout if RTBox3a is unclear, code has been disabled" << endl;
#endif
//#endif
cout << "success (" << timer.stop() << " seconds)" << endl;
return 0;
}
错误线是这些
int pow(int a, int n) {
// versions for float/double are defined in stdlib.
int r = a;
for (int i = 1; i < n; i++) r *= a;
return r;
}
#if defined(__GNUC__) || defined(__INTEL_COMPILER)
int pow(double a, int n) {
return pow(a, (double)n);
}
#endif
和
template<int N, typename DataType>
void testbox() {
typedef RTVec_t<N, DataType> rtvec;
typedef RTBox_t<N, DataType> rtbox;
rtbox a;
a[0] = rtvec(2);
a[1] = rtvec(12);
rtbox b(rtvec(1), rtvec(10));
rtbox d = a + b;
rtbox e = a - b;
if (d.sides().minimum() != 11 || e.center().maximum() != 6) {
cout << "err301 = " << a << ";" << endl;
//exit(301);
}
DataType dv = d.volume();
d[1][0] = 20;
rtvec v = d.sides();
if (v.minIndex() != 1 || dv != pow(convert<DataType>(11), N)) {
cout << "err302 = " << d << ";" << endl;
//exit(302);
}
}
我不知道在这段代码中引入pow定义的最初原因是什么(尤其是因为它们由实现宏保护(，但在符合标准的C++中，定义
int pow(double a, int n) {
return pow(a, (double)n);
}
在全局命名空间中会引起麻烦。根据标准版本的不同，<math.h>和/或<cmath>是否直接或间接包含，并取决于未指定的标准库实现细节，这可能是有效的定义，也可能不是有效的定义。
C++标准库已经提供了一个带有签名pow(double, int)的重载，或者可能是一个接受这些参数的模板pow。在前一种情况下，如果将该重载/模板放入全局命名空间，则用户代码中的定义将是无效的重新定义(包括math.h总是这样做，包括<cmath>可能这样做(。
第二次过载
int pow(int a, int n) {
// versions for float/double are defined in stdlib.
int r = a;
for (int i = 1; i < n; i++) r *= a;
return r;
}
将导致类似的问题，但仅限于C++11之后(在此之前不存在此重载，并且它与C++11及更高版本中的版本具有不同的语义(。
因此，这只是代码中的一个错误。作为变通方法，我注意到(出于某种原因，我不清楚(GCC 5.x及以下版本似乎在定义上没有出错，尽管我试图确保它们会出错。由于6.1，过载总是与#include<math.h>和-std=c++89/-std=gnu++89一起导致错误。
您可能还想尝试针对-std=c++11或-std=gnu++11进行编译，因为由于允许C++11实现将pow重载实现为模板函数，在这种情况下不会发生重新定义错误。(我认为这在C++11之前是不允许的。(在我的测试中，GCC似乎就是这样。