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Commit 154e2854 authored by Daniel Towner's avatar Daniel Towner
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CPU: Modified SIMD verification to work on any vector width. 

This helps pave the way to test wider SIMD ISAs, such as AVX-512.
parent 15d95f7a
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Showing with 479 additions and 222 deletions
openmmapi/include/openmm/internal/vectorize8.h
View file @ 154e2854
...@@ -46,7 +46,7 @@ class fvec8 { ...@@ -46,7 +46,7 @@ class fvec8 {
public: public:
__m256 val; __m256 val;
fvec8() {} fvec8() = default;
fvec8(float v) : val(_mm256_set1_ps(v)) {} fvec8(float v) : val(_mm256_set1_ps(v)) {}
fvec8(float v1, float v2, float v3, float v4, float v5, float v6, float v7, float v8) : val(_mm256_set_ps(v8, v7, v6, v5, v4, v3, v2, v1)) {} fvec8(float v1, float v2, float v3, float v4, float v5, float v6, float v7, float v8) : val(_mm256_set_ps(v8, v7, v6, v5, v4, v3, v2, v1)) {}
fvec8(__m256 v) : val(v) {} fvec8(__m256 v) : val(v) {}
......
openmmapi/include/openmm/internal/vectorize_neon.h
View file @ 154e2854
...@@ -74,7 +74,7 @@ class fvec4 { ...@@ -74,7 +74,7 @@ class fvec4 {
public: public:
float32x4_t val; float32x4_t val;
fvec4() {} fvec4() = default;
fvec4(float v) : val(vdupq_n_f32(v)) {} fvec4(float v) : val(vdupq_n_f32(v)) {}
fvec4(float v1, float v2, float v3, float v4) { fvec4(float v1, float v2, float v3, float v4) {
float v[] = {v1, v2, v3, v4}; float v[] = {v1, v2, v3, v4};
......
openmmapi/include/openmm/internal/vectorize_pnacl.h
View file @ 154e2854
...@@ -56,7 +56,7 @@ class fvec4 { ...@@ -56,7 +56,7 @@ class fvec4 {
public: public:
__m128 val; __m128 val;
fvec4() {} fvec4() = default;
fvec4(float v) { fvec4(float v) {
val = {v, v, v, v}; val = {v, v, v, v};
} }
......
openmmapi/include/openmm/internal/vectorize_ppc.h
View file @ 154e2854
...@@ -57,7 +57,7 @@ class fvec4 { ...@@ -57,7 +57,7 @@ class fvec4 {
public: public:
__m128 val; __m128 val;
fvec4() {} fvec4() = default;
fvec4(float v) { fvec4(float v) {
val = (__m128) {v, v, v, v}; val = (__m128) {v, v, v, v};
} }
......
openmmapi/include/openmm/internal/vectorize_sse.h
View file @ 154e2854
...@@ -68,7 +68,7 @@ class fvec4 { ...@@ -68,7 +68,7 @@ class fvec4 {
public: public:
__m128 val; __m128 val;
fvec4() {} fvec4() = default;
fvec4(float v) : val(_mm_set1_ps(v)) {} fvec4(float v) : val(_mm_set1_ps(v)) {}
fvec4(float v1, float v2, float v3, float v4) : val(_mm_set_ps(v4, v3, v2, v1)) {} fvec4(float v1, float v2, float v3, float v4) : val(_mm_set_ps(v4, v3, v2, v1)) {}
fvec4(__m128 v) : val(v) {} fvec4(__m128 v) : val(v) {}
......
tests/TestVectorize.cpp
View file @ 154e2854
...@@ -8,7 +8,7 @@ ...@@ -8,7 +8,7 @@
* * * *
* Portions copyright (c) 2014-2015 Stanford University and the Authors. * * Portions copyright (c) 2014-2015 Stanford University and the Authors. *
* Authors: Peter Eastman * * Authors: Peter Eastman *
* Contributors: * * Contributors: Daniel Towner *
* * * *
* Permission is hereby granted, free of charge, to any person obtaining a * * Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), * * copy of this software and associated documentation files (the "Software"), *
...@@ -35,6 +35,9 @@ ...@@ -35,6 +35,9 @@
#include "openmm/internal/AssertionUtilities.h" #include "openmm/internal/AssertionUtilities.h"
#include "openmm/internal/vectorize.h" #include "openmm/internal/vectorize.h"
#include "TestVectorizeGeneric.h"
#include <iostream> #include <iostream>
using namespace OpenMM; using namespace OpenMM;
...@@ -203,45 +206,6 @@ void testTranspose() { ...@@ -203,45 +206,6 @@ void testTranspose() {
ASSERT_VEC4_EQUAL(h[3], 0.4, 0.8, 1.2, 1.6); ASSERT_VEC4_EQUAL(h[3], 0.4, 0.8, 1.2, 1.6);
} }
void testUtility() {
fvec4 f1(7, 2, -5, 13);
fvec4 f2(1, 2, 4, 7);
fvec4 f3(0.5, 1.0, 1.5, 2.0);
// Reduce-add across three vectors into a single vec3.
const auto computedVec3 = reduceToVec3(f1, f2, f3);
ASSERT_EQUAL(17, computedVec3[0]);
ASSERT_EQUAL(14, computedVec3[1]);
ASSERT_EQUAL(5, computedVec3[2]);
// Gather values from a table. Variants for both one vector and two vector gathers are provided.
float table[2048];
for (int i=0; i<2048;++i)
table[i] = -i; // Same index to make it easy to debug, but negative to avoid copying idx.
// Single vector gather.
const int vidx[4] = {156, 1987, 33, 1003};
fvec4 g(table, vidx);
ASSERT_VEC4_EQUAL(g, -156, -1987, -33, -1003);
// Pair-wise vector gather.
fvec4 p0, p1;
gatherVecPair(table, ivec4(57, 105, 1976, 91), p0, p1);
ASSERT_VEC4_EQUAL(p0, -57, -105, -1976, -91);
ASSERT_VEC4_EQUAL(p1, -58, -106, -1977, -92);
// Verify building blend mask from integer. The mask isn't checked directly, as different platforms
// use different types of mask. Instead, check the side effect of using the mask in a blend.
const auto elements = fvec4(1, 2, 3, 4);
const auto maskZero = fvec4::expandBitsToMask(0);
ASSERT_VEC4_EQUAL_INT(blendZero(elements, maskZero), 0, 0, 0, 0);
const auto maskOne = fvec4::expandBitsToMask(0b1111);
ASSERT_VEC4_EQUAL_INT(blendZero(elements, maskOne), 1, 2, 3, 4);
const auto maskMix = fvec4::expandBitsToMask(0b1001);
ASSERT_VEC4_EQUAL_INT(blendZero(elements, maskMix), 1, 0, 0, 4);
}
int main(int argc, char* argv[]) { int main(int argc, char* argv[]) {
try { try {
if (!isVec4Supported()) { if (!isVec4Supported()) {
...@@ -249,12 +213,10 @@ int main(int argc, char* argv[]) { ...@@ -249,12 +213,10 @@ int main(int argc, char* argv[]) {
return 0; return 0;
} }
testLoadStore(); testLoadStore();
testArithmetic();
testLogic(); testLogic();
testComparisons();
testMathFunctions(); TestFvec<fvec4>::testAll();
testTranspose();
testUtility();
} }
catch(const exception& e) { catch(const exception& e) {
cout << "exception: " << e.what() << endl; cout << "exception: " << e.what() << endl;
......
tests/TestVectorize8.cpp
View file @ 154e2854
...@@ -8,7 +8,7 @@ ...@@ -8,7 +8,7 @@
* * * *
* Portions copyright (c) 2014-2015 Stanford University and the Authors. * * Portions copyright (c) 2014-2015 Stanford University and the Authors. *
* Authors: Robert T. McGibbon * * Authors: Robert T. McGibbon *
* Contributors: * * Contributors: Daniel Towner *
* * * *
* Permission is hereby granted, free of charge, to any person obtaining a * * Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), * * copy of this software and associated documentation files (the "Software"), *
...@@ -37,6 +37,7 @@ ...@@ -37,6 +37,7 @@
#include "openmm/internal/vectorize8.h" #include "openmm/internal/vectorize8.h"
#include <iostream> #include <iostream>
#include "TestVectorizeGeneric.h"
#ifndef __AVX__ #ifndef __AVX__
bool isVec8Supported() { bool isVec8Supported() {
...@@ -66,32 +67,15 @@ using namespace std; ...@@ -66,32 +67,15 @@ using namespace std;
#define ASSERT_VEC8_EQUAL(found, expected0, expected1, expected2, expected3, expected4, expected5, expected6, expected7) {if (std::abs((found).lowerVec()[0]-(expected0))>1e-6 || std::abs((found).lowerVec()[1]-(expected1))>1e-6 || std::abs((found).lowerVec()[2]-(expected2))>1e-6 || std::abs((found).lowerVec()[3]-(expected3))>1e-6 || std::abs((found).upperVec()[0]-(expected4))>1e-6 || std::abs((found).upperVec()[1]-(expected5))>1e-6 || std::abs((found).upperVec()[2]-(expected6))>1e-6 || std::abs((found).upperVec()[3]-(expected7))>1e-6) {std::stringstream details; details << " Expected ("<<(expected0)<<","<<(expected1)<<","<<(expected2)<<","<<(expected3)<<","<<(expected4)<<","<<(expected5)<<","<<(expected6)<<","<<(expected7)<<"), found ("<<(found).lowerVec()[0]<<","<<(found).lowerVec()[1]<<","<<(found).lowerVec()[2]<<","<<(found).lowerVec()[3]<<","<<(found).upperVec()[0]<<","<<(found).upperVec()[1]<<","<<(found).upperVec()[2]<<","<<(found).upperVec()[3]<<")"; throwException(__FILE__, __LINE__, details.str());}}; #define ASSERT_VEC8_EQUAL(found, expected0, expected1, expected2, expected3, expected4, expected5, expected6, expected7) {if (std::abs((found).lowerVec()[0]-(expected0))>1e-6 || std::abs((found).lowerVec()[1]-(expected1))>1e-6 || std::abs((found).lowerVec()[2]-(expected2))>1e-6 || std::abs((found).lowerVec()[3]-(expected3))>1e-6 || std::abs((found).upperVec()[0]-(expected4))>1e-6 || std::abs((found).upperVec()[1]-(expected5))>1e-6 || std::abs((found).upperVec()[2]-(expected6))>1e-6 || std::abs((found).upperVec()[3]-(expected7))>1e-6) {std::stringstream details; details << " Expected ("<<(expected0)<<","<<(expected1)<<","<<(expected2)<<","<<(expected3)<<","<<(expected4)<<","<<(expected5)<<","<<(expected6)<<","<<(expected7)<<"), found ("<<(found).lowerVec()[0]<<","<<(found).lowerVec()[1]<<","<<(found).lowerVec()[2]<<","<<(found).lowerVec()[3]<<","<<(found).upperVec()[0]<<","<<(found).upperVec()[1]<<","<<(found).upperVec()[2]<<","<<(found).upperVec()[3]<<")"; throwException(__FILE__, __LINE__, details.str());}};
#define ASSERT_VEC8_EQUAL_INT(found, expected0, expected1, expected2, expected3, expected4, expected5, expected6, expected7) {if ((found).lowerVec()[0] != (expected0) || (found).lowerVec()[1] != (expected1) || (found).lowerVec()[2] != (expected2) || (found).lowerVec()[3] != (expected3) || (found).upperVec()[0] != (expected4) || (found).upperVec()[1] != (expected5) ||(found).upperVec()[2] != (expected6) || (found).upperVec()[3] != (expected7)) {std::stringstream details; details << " Expected ("<<(expected0)<<","<<(expected1)<<","<<(expected2)<<","<<(expected3)<<","<<(expected4)<<","<<(expected5)<<","<<(expected6)<<","<<(expected7)<<"), found ("<<(found).lowerVec()[0]<<","<<(found).lowerVec()[1]<<","<<(found).lowerVec()[2]<<","<<(found).lowerVec()[3]<<","<<(found).upperVec()[0]<<","<<(found).upperVec()[1]<<","<<(found).upperVec()[2]<<","<<(found).upperVec()[3]<<")"; throwException(__FILE__, __LINE__, details.str());}}; #define ASSERT_VEC8_EQUAL_INT(found, expected0, expected1, expected2, expected3, expected4, expected5, expected6, expected7) {if ((found).lowerVec()[0] != (expected0) || (found).lowerVec()[1] != (expected1) || (found).lowerVec()[2] != (expected2) || (found).lowerVec()[3] != (expected3) || (found).upperVec()[0] != (expected4) || (found).upperVec()[1] != (expected5) ||(found).upperVec()[2] != (expected6) || (found).upperVec()[3] != (expected7)) {std::stringstream details; details << " Expected ("<<(expected0)<<","<<(expected1)<<","<<(expected2)<<","<<(expected3)<<","<<(expected4)<<","<<(expected5)<<","<<(expected6)<<","<<(expected7)<<"), found ("<<(found).lowerVec()[0]<<","<<(found).lowerVec()[1]<<","<<(found).lowerVec()[2]<<","<<(found).lowerVec()[3]<<","<<(found).upperVec()[0]<<","<<(found).upperVec()[1]<<","<<(found).upperVec()[2]<<","<<(found).upperVec()[3]<<")"; throwException(__FILE__, __LINE__, details.str());}};
void testLoadStore() { void testLoadStore() {
fvec8 f1(2.0);
ivec8 i1(3); ivec8 i1(3);
ASSERT_VEC8_EQUAL(f1, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0, 2.0);
ASSERT_VEC8_EQUAL_INT(i1, 3, 3, 3, 3, 3, 3, 3, 3); ASSERT_VEC8_EQUAL_INT(i1, 3, 3, 3, 3, 3, 3, 3, 3);
fvec8 f2(2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0);
ivec8 i2(2, 3, 4, 5, 6, 7, 8, 9); ivec8 i2(2, 3, 4, 5, 6, 7, 8, 9);
ASSERT_VEC8_EQUAL(f2, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0);
ASSERT_VEC8_EQUAL_INT(i2, 2, 3, 4, 5, 6, 7, 8, 9); ASSERT_VEC8_EQUAL_INT(i2, 2, 3, 4, 5, 6, 7, 8, 9);
float farray[8];
int iarray[8]; int iarray[8];
f2.store(farray);
i2.store(iarray); i2.store(iarray);
fvec8 f3(farray);
ivec8 i3(iarray); ivec8 i3(iarray);
ASSERT_VEC8_EQUAL(f3, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0);
ASSERT_VEC8_EQUAL_INT(i3, 2, 3, 4, 5, 6, 7, 8, 9); ASSERT_VEC8_EQUAL_INT(i3, 2, 3, 4, 5, 6, 7, 8, 9);
ASSERT_EQUAL(f3.lowerVec()[0], 2.5);
ASSERT_EQUAL(f3.lowerVec()[1], 3.0);
ASSERT_EQUAL(f3.lowerVec()[2], 3.5);
ASSERT_EQUAL(f3.lowerVec()[3], 4.0);
ASSERT_EQUAL(f3.upperVec()[0], 4.5);
ASSERT_EQUAL(f3.upperVec()[1], 5.0);
ASSERT_EQUAL(f3.upperVec()[2], 5.5);
ASSERT_EQUAL(f3.upperVec()[3], 6.0);
ASSERT_EQUAL(i3.lowerVec()[0], 2); ASSERT_EQUAL(i3.lowerVec()[0], 2);
ASSERT_EQUAL(i3.lowerVec()[1], 3); ASSERT_EQUAL(i3.lowerVec()[1], 3);
ASSERT_EQUAL(i3.lowerVec()[2], 4); ASSERT_EQUAL(i3.lowerVec()[2], 4);
...@@ -112,27 +96,6 @@ void testLoadStore() { ...@@ -112,27 +96,6 @@ void testLoadStore() {
ASSERT_EQUAL(overwriteTest[3], 9); ASSERT_EQUAL(overwriteTest[3], 9);
} }
void testArithmetic() {
fvec8 f1(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
ASSERT_VEC8_EQUAL(f1+fvec8(1, 2, 3, 4, 5, 6, 7, 8), 1.5, 3. , 4.5, 6. , 7.5, 9. , 10.5, 12.);
ASSERT_VEC8_EQUAL(f1-fvec8(1, 2, 3, 4, 5, 6, 7, 8), -0.5, -1. , -1.5, -2. , -2.5, -3. , -3.5, -4.);
ASSERT_VEC8_EQUAL(f1*fvec8(1, 2, 3, 4, 5, 6, 7, 8), 0.5, 2. , 4.5, 8. , 12.5, 18. , 24.5, 32.);
ASSERT_VEC8_EQUAL(f1/fvec8(1, 2, 3, 4, 5, 6, 7, 8), 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5);
f1 = fvec8(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
f1 += fvec8(1, 2, 3, 4, 5, 6, 7, 8);
ASSERT_VEC8_EQUAL(f1, 1.5, 3. , 4.5, 6. , 7.5, 9. , 10.5, 12.);
f1 = fvec8(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
f1 -= fvec8(1, 2, 3, 4, 5, 6, 7, 8);
ASSERT_VEC8_EQUAL(f1, -0.5, -1. , -1.5, -2. , -2.5, -3. , -3.5, -4.);
f1 = fvec8(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
f1 *= fvec8(1, 2, 3, 4, 5, 6, 7, 8);
ASSERT_VEC8_EQUAL(f1, 0.5, 2. , 4.5, 8. , 12.5, 18. , 24.5, 32.);
f1 = fvec8(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
f1 /= fvec8(1, 2, 3, 4, 5, 6, 7, 8);
ASSERT_VEC8_EQUAL(f1, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5);
}
void testLogic() { void testLogic() {
int allBits = -1; int allBits = -1;
float allBitsf = *((float*) &allBits); float allBitsf = *((float*) &allBits);
...@@ -154,134 +117,6 @@ void testLogic() { ...@@ -154,134 +117,6 @@ void testLogic() {
ASSERT_VEC8_EQUAL_INT(i1|mask, 1, allBits, allBits, 4, 5, allBits, allBits, 8); ASSERT_VEC8_EQUAL_INT(i1|mask, 1, allBits, allBits, 4, 5, allBits, allBits, 8);
} }
void testComparisons() {
fvec8 v1(0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
fvec8 v2(1.5, 1.5, 1.5, 1.5, 1.5, 1.5, 1.5, 1.5);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)==fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
0.0, 1.5, 1.5, 0.0, 0.0, 1.5, 1.5, 0.0);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)!=fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
1.5, 0.0, 0.0, 1.5, 1.5, 0.0, 0.0, 1.5);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)<fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
1.5, 0.0, 0.0, 0.0, 1.5, 0.0, 0.0, 0.0);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)>fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
0.0, 0.0, 0.0, 1.5, 0.0, 0.0, 0.0, 1.5);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)<=fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
1.5, 1.5, 1.5, 0.0, 1.5, 1.5, 1.5, 0.0);
ASSERT_VEC8_EQUAL(blend(v1, v2,
fvec8(1.0, 1.5, 3.0, 2.2, 10.0, 10.5, 13.0, 12.2)>=fvec8(1.1, 1.5, 3.0, 2.1, 10.1, 10.5, 13.0, 12.1)),
0.0, 1.5, 1.5, 1.5, 0.0, 1.5, 1.5, 1.5);
}
void testMathFunctions() {
fvec8 f1(0.4, 1.9, -1.2, -3.8, 0.4, 1.9, -1.2, -3.8);
fvec8 f2(1.1, 1.2, 1.3, -5.0, 1.1, 1.2, 1.3, -5.0);
ASSERT_VEC8_EQUAL(floor(f1), 0.0, 1.0, -2.0, -4.0, 0.0, 1.0, -2.0, -4.0);
ASSERT_VEC8_EQUAL(ceil(f1), 1.0, 2.0, -1.0, -3.0, 1.0, 2.0, -1.0, -3.0);
ASSERT_VEC8_EQUAL(round(f1), 0.0, 2.0, -1.0, -4.0, 0.0, 2.0, -1.0, -4.0);
ASSERT_VEC8_EQUAL(abs(f1), 0.4, 1.9, 1.2, 3.8, 0.4, 1.9, 1.2, 3.8);
ASSERT_VEC8_EQUAL(min(f1, f2), 0.4, 1.2, -1.2, -5.0, 0.4, 1.2, -1.2, -5.0);
ASSERT_VEC8_EQUAL(max(f1, f2), 1.1, 1.9, 1.3, -3.8, 1.1, 1.9, 1.3, -3.8);
ASSERT_VEC8_EQUAL(sqrt(fvec8(1.5, 3.1, 4.0, 15.0, 1.5, 3.1, 4.0, 15.0)), sqrt(1.5), sqrt(3.1), sqrt(4.0), sqrt(15.0), sqrt(1.5), sqrt(3.1), sqrt(4.0), sqrt(15.0));
ASSERT_VEC8_EQUAL(rsqrt(fvec8(1.5, 3.1, 4.0, 15.0, 1.5, 3.1, 4.0, 15.0)), 1.0/sqrt(1.5), 1.0/sqrt(3.1), 1.0/sqrt(4.0), 1.0/sqrt(15.0), 1.0/sqrt(1.5), 1.0/sqrt(3.1), 1.0/sqrt(4.0), 1.0/sqrt(15.0));
ASSERT_EQUAL_TOL(f1.lowerVec()[0]*f2.lowerVec()[0]+f1.lowerVec()[1]*f2.lowerVec()[1]+f1.lowerVec()[2]*f2.lowerVec()[2]+f1.lowerVec()[3]*f2.lowerVec()[3]+f1.upperVec()[0]*f2.upperVec()[0]+f1.upperVec()[1]*f2.upperVec()[1]+f1.upperVec()[2]*f2.upperVec()[2]+f1.upperVec()[3]*f2.upperVec()[3], dot8(f1, f2), 1e-6);
ASSERT(any(f1 > 0.5));
ASSERT(!any(f1 > 2.0));
ASSERT_VEC8_EQUAL(blend(f1, f2, ivec8(-1, 0, -1, 0, -1, 0, -1, 0)), 1.1, 1.9, 1.3, -3.8, 1.1, 1.9, 1.3, -3.8);
}
void testTranspose() {
fvec4 f[8] = {
{0.0, 1.0, 2.0, 3.0},
{10.0, 11.0, 12.0, 13.0},
{20.0, 21.0, 22.0, 23.0},
{30.0, 31.0, 32.0, 33.0},
{40.0, 41.0, 42.0, 43.0},
{50.0, 51.0, 52.0, 53.0},
{60.0, 61.0, 62.0, 63.0},
{70.0, 71.0, 72.0, 73.0}
};
fvec8 o1, o2, o3, o4;
transpose(f[0], f[1], f[2], f[3], f[4], f[5], f[6], f[7], o1, o2, o3, o4);
ASSERT_VEC8_EQUAL(o1, 0.0, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0);
ASSERT_VEC8_EQUAL(o2, 1.0, 11.0, 21.0, 31.0, 41.0, 51.0, 61.0, 71.0);
ASSERT_VEC8_EQUAL(o3, 2.0, 12.0, 22.0, 32.0, 42.0, 52.0, 62.0, 72.0);
ASSERT_VEC8_EQUAL(o4, 3.0, 13.0, 23.0, 33.0, 43.0, 53.0, 63.0, 73.0);
fvec8 q1, q2, q3, q4;
transpose(f, q1, q2, q3, q4);
ASSERT_VEC8_EQUAL(q1, 0.0, 10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0);
ASSERT_VEC8_EQUAL(q2, 1.0, 11.0, 21.0, 31.0, 41.0, 51.0, 61.0, 71.0);
ASSERT_VEC8_EQUAL(q3, 2.0, 12.0, 22.0, 32.0, 42.0, 52.0, 62.0, 72.0);
ASSERT_VEC8_EQUAL(q4, 3.0, 13.0, 23.0, 33.0, 43.0, 53.0, 63.0, 73.0);
fvec4 g[8];
transpose(o1, o2, o3, o4, g[0], g[1], g[2], g[3], g[4], g[5], g[6], g[7]);
ASSERT_VEC4_EQUAL(g[0], 0.0, 1.0, 2.0, 3.0);
ASSERT_VEC4_EQUAL(g[1], 10.0, 11.0, 12.0, 13.0);
ASSERT_VEC4_EQUAL(g[2], 20.0, 21.0, 22.0, 23.0);
ASSERT_VEC4_EQUAL(g[3], 30.0, 31.0, 32.0, 33.0);
ASSERT_VEC4_EQUAL(g[4], 40.0, 41.0, 42.0, 43.0);
ASSERT_VEC4_EQUAL(g[5], 50.0, 51.0, 52.0, 53.0);
ASSERT_VEC4_EQUAL(g[6], 60.0, 61.0, 62.0, 63.0);
ASSERT_VEC4_EQUAL(g[7], 70.0, 71.0, 72.0, 73.0);
fvec4 h[8];
transpose(o1, o2, o3, o4, h);
ASSERT_VEC4_EQUAL(h[0], 0.0, 1.0, 2.0, 3.0);
ASSERT_VEC4_EQUAL(h[1], 10.0, 11.0, 12.0, 13.0);
ASSERT_VEC4_EQUAL(h[2], 20.0, 21.0, 22.0, 23.0);
ASSERT_VEC4_EQUAL(h[3], 30.0, 31.0, 32.0, 33.0);
ASSERT_VEC4_EQUAL(h[4], 40.0, 41.0, 42.0, 43.0);
ASSERT_VEC4_EQUAL(h[5], 50.0, 51.0, 52.0, 53.0);
ASSERT_VEC4_EQUAL(h[6], 60.0, 61.0, 62.0, 63.0);
ASSERT_VEC4_EQUAL(h[7], 70.0, 71.0, 72.0, 73.0);
}
void testUtility() {
fvec8 f1(0.4, 1.9, -1.2, -3.8, 0.4, 1.9, -6.8, -3.8);
fvec8 f2(1, 2, 4, 7, 19, 31, 64, 5);
fvec8 f3(0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0);
// Reduce-add across three vectors into a single vec3.
const auto computedVec3 = reduceToVec3(f1, f2, f3);
ASSERT_EQUAL(-11, computedVec3[0]);
ASSERT_EQUAL(133, computedVec3[1]);
ASSERT_EQUAL(18, computedVec3[2]);
// Gather values from a table. Variants for both one vector and two vector gathers are provided.
float table[2048];
for (int i=0; i<2048;++i)
table[i] = -i; // Same index to make it easy to debug, but negative to avoid copying idx.
// Single vector gather.
const int vidx[8] = {4, 8, 156, 1987, 23, 65, 33, 1003};
fvec8 g(table, vidx);
ASSERT_VEC8_EQUAL(g, -4, -8, -156, -1987, -23, -65, -33, -1003);
// Pair-wise vector gather.
fvec8 p0, p1;
gatherVecPair(table, ivec8(57, 105, 1976, 91, 636, 1952, 345, 12), p0, p1);
ASSERT_VEC8_EQUAL(p0, -57, -105, -1976, -91, -636, -1952, -345, -12);
ASSERT_VEC8_EQUAL(p1, -58, -106, -1977, -92, -637, -1953, -346, -13);
// Verify building blend mask from integer. The mask isn't checked directly, as different platforms
// use different types of mask. Instead, check the side effect of using the mask in a blend.
const auto elements = fvec8(1, 2, 3, 4, 5, 6, 7, 8);
const auto maskZero = fvec8::expandBitsToMask(0);
ASSERT_VEC8_EQUAL_INT(blendZero(elements, maskZero), 0, 0, 0, 0, 0, 0, 0, 0);
const auto maskOne = fvec8::expandBitsToMask(0b11111111);
ASSERT_VEC8_EQUAL_INT(blendZero(elements, maskOne), 1, 2, 3, 4, 5, 6, 7, 8);
const auto maskMix = fvec8::expandBitsToMask(0b01101001);
ASSERT_VEC8_EQUAL_INT(blendZero(elements, maskMix), 1, 0, 0, 4, 0, 6, 7, 0);
}
int main(int argc, char* argv[]) { int main(int argc, char* argv[]) {
try { try {
if (!isVec8Supported()) { if (!isVec8Supported()) {
...@@ -289,12 +124,10 @@ int main(int argc, char* argv[]) { ...@@ -289,12 +124,10 @@ int main(int argc, char* argv[]) {
return 0; return 0;
} }
testLoadStore(); testLoadStore();
testArithmetic();
testLogic(); testLogic();
testComparisons();
testMathFunctions(); TestFvec<fvec8>::testAll();
testTranspose();
testUtility();
} }
catch(const exception& e) { catch(const exception& e) {
cout << "exception: " << e.what() << endl; cout << "exception: " << e.what() << endl;
......
tests/TestVectorizeGeneric.h 0 → 100644
View file @ 154e2854
/* -------------------------------------------------------------------------- *
* OpenMM *
* -------------------------------------------------------------------------- *
* This is part of the OpenMM molecular simulation toolkit originating from *
* Simbios, the NIH National Center for Physics-Based Simulation of *
* Biological Structures at Stanford, funded under the NIH Roadmap for *
* Medical Research, grant U54 GM072970. See https://simtk.org. *
* *
* Portions copyright (c) 2014-2020 Stanford University and the Authors. *
* Authors: Daniel Towner *
* Contributors: *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS, CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE *
* USE OR OTHER DEALINGS IN THE SOFTWARE. *
* -------------------------------------------------------------------------- */
#pragma once
/**
* This tests all sizes of vectorized operations using templated test code.
*/
#include <array>
#include <functional>
#include <iostream>
#include <iterator>
#include <numeric>
#include <memory.h>
#include <sstream>
#include <typeinfo>
/**
* Return the 32-bit integer bit pattern from the given floating-point value.
*/
static int32_t floatAsIntBits(float f) {
int32_t i;
memcpy(&i, &f, 4);
return i;
}
/**
* Compare two floating-point values using units-in-last-place (ULP) as a measure of equality. Two values
* which are only a few representable values apart can be considered to be equal. Note that IEEE
* operations (add, mul, etc.) will always be exact, but sequences of operations might be more than
* a few ULP apart, but still close enough to be considered equal. ULP comparisons work at any scale of
* number, unlike an epsilon-based approach.
*/
static bool almostEqual(float a, float b) {
// Maybe they really are equal.
if (a == b)
return true;
// Infinities and NANs are never equal to anything, even other nans and infinities.
if (std::isnan(a) || std::isinf(a) ||
std::isnan(b) || std::isinf(b))
return false;
// If they are different signs then they can't be equal. For two very small denormal values they might
// be very close to each other but either side of 0, but denormals are a corner case which don't deserve
// to be equal.
if (std::signbit(a) != std::signbit(b))
return false;
// The two numbers must be valid values with the same sign, so treat then as basic integers to
// get at their ULP values. If they are only a few ULP apart, then they are essentially equal.
int32_t intDiff = std::abs(floatAsIntBits(a) - floatAsIntBits(b));
return intDiff < 4;
}
static bool exactlyEqual(float a, float b) { return a == b; }
/**
* Write the contents of the given array-like object to a stream. No formatting is applied.
*/
template<typename FVEC>
void VecToStream(std::ostream& stream, const FVEC& vec)
{
constexpr int numElements = sizeof(FVEC) / sizeof(float);
const float* vptr = (const float*)&vec;
for (int i=0; i<numElements; ++i)
stream << vptr[i] << ", ";
}
/**
* Given two vector-like objects compared each of their elements for equality. The vector objects can be
* anything which in memory is a list of 32-bit floating-point values, so SIMD vectors, C arrays or
* C++ arrays would all be valid.
*/
template<typename S, typename T>
static void checkElementsEqual(const S& computed, const T& expected,
std::function<bool(float, float)> equal_fn,
const char* file, int line) {
// Both S and T should be arrays of floats of the same length.
static_assert(sizeof(T) == sizeof(S), "Array-like elements must have the same size");
constexpr int numElements = sizeof(S) / sizeof(float);
const float* computedPtr = (const float*)&computed;
const float* expectedPtr = (const float*)&expected;
std::ostringstream details;
details << "Error during test for type " << typeid(S).name() << '\n';
bool passed = true;
for (int i=0; i<numElements; ++i)
{
if (!equal_fn(computedPtr[i], expectedPtr[i]))
passed = false;
}
if (!passed)
{
details << "Values differ. ";
VecToStream(details, computed);
details << " and ";
VecToStream(details, expected);
OpenMM::throwException(file, line, details.str());
}
}
#define ASSERT_VEC_EQUAL(computed, expected) {checkElementsEqual(computed, expected, exactlyEqual, __FILE__, __LINE__);}
#define ASSERT_VEC_ALMOST_EQUAL(computed, expected) {checkElementsEqual(computed, expected, almostEqual, __FILE__, __LINE__);}
static float getRandomFloat () {
// Between -50 and 50.
return float(rand()) / float(RAND_MAX/100.0f) - 50.0f;
}
/**
* Given an array-like memory object containing floats, apply the given function to every element.
*/
template<typename FVEC>
FVEC applyUnaryFn(const FVEC& v, std::function<float(float)> fn) {
constexpr int numElements = sizeof(FVEC) / sizeof(float);
FVEC result;
float* rp = (float*)&result;
const float* vp = (const float*)&v;
for (int i=0; i<numElements; ++i)
rp[i] = fn(vp[i]);
return result;
}
/**
* Given an array-like memory object containing floats, apply the given function to every element.
*/
template<typename FVEC>
FVEC applyBinaryFn(const FVEC& a, const FVEC& b, std::function<float(float, float)> fn) {
constexpr int numElements = sizeof(FVEC) / sizeof(float);
FVEC result;
float* rp = (float*)&result;
const float* ap = (const float*)&a;
const float* bp = (const float*)&b;
for (int i=0; i<numElements; ++i)
rp[i] = fn(ap[i], bp[i]);
return result;
}
/**
* Provide a test fixture class which underpins all verification for a given
* type of vector SIMD implementation, as well as providing common utility functions
*/
template<typename FVEC>
class TestFvec {
public:
static constexpr int numElements = sizeof(FVEC) / sizeof(float);
void testInitializers() const;
void testUnaryOps() const;
void testBinaryOps() const;
void testUtilities() const;
void testBlendAndCompare() const;
void testTranspose() const;
static void testAll() {
TestFvec<FVEC> testUnit;
testUnit.testInitializers();
testUnit.testUnaryOps();
testUnit.testBinaryOps();
testUnit.testUtilities();
testUnit.testBlendAndCompare();
testUnit.testTranspose();
}
FVEC getRandomFvec() const {
union {
FVEC v;
float f[numElements];
};
for (auto& e : f)
e = getRandomFloat();
return v;
}
};
template<typename FVEC>
void TestFvec<FVEC>::testInitializers() const {
FVEC computedZero = {};
float expectedZero[numElements] = {};
ASSERT_VEC_EQUAL(computedZero, expectedZero);
FVEC computedBroadcast(14.5f);
float expectedBroadcast[numElements];
std::fill_n(expectedBroadcast, numElements, 14.5f);
ASSERT_VEC_EQUAL(computedBroadcast, expectedBroadcast);
float expectedArray[numElements];
std::iota(expectedArray, expectedArray + numElements, 23);
FVEC computedFromLoad(expectedArray);
ASSERT_VEC_EQUAL(computedFromLoad, expectedArray);
// Gather values from a table. Variants for both one vector and two vector gathers are provided.
// The indexes to gather (multiples of 7) are also generated, along with the expected answers.
float gatherTable[2048];
for (int i=0; i<2048;++i)
gatherTable[i] = -i; // Same index to make it easy to debug, but negative to avoid copying idx.
int gatherIndexes[numElements];
float gatherIndexesAsFloat[numElements]; // Same as above, but in float format.
float expectedGather0[numElements];
float expectedGather1[numElements];
for (int i=0; i<numElements; ++i)
{
gatherIndexes[i] = i * 7;
gatherIndexesAsFloat[i] = float(gatherIndexes[i]);
expectedGather0[i] = -(i * 7);
expectedGather1[i] = -(i * 7) - 1; // Each value is one less than previous.
}
// Single value gather
FVEC computedFromGather(gatherTable, gatherIndexes);
ASSERT_VEC_EQUAL(computedFromGather, expectedGather0);
// Pair-wise vector gather. The first values should be the same as a normal gather, and the
// second are just increments from the first. Note that there musty be some suitable conversion
// from a floating-point index (i.e., an integer value in float format), and the type required
// for the second operand of gatherVecPair. gatherVecPair can then take either an actual
// float vector, or some suitable format like ivec4 or ivec8.
FVEC findex(gatherIndexesAsFloat);
FVEC p0, p1;
gatherVecPair(gatherTable, findex, p0, p1);
ASSERT_VEC_EQUAL(p0, expectedGather0);
ASSERT_VEC_EQUAL(p1, expectedGather1);
}
template<typename FVEC>
void TestFvec<FVEC>::testUnaryOps() const {
const auto v = getRandomFvec();
// Note that these are exact comparisons because all these SIMD operators are
// just applying the scalar operator, so there should be no loss of precision.
ASSERT_VEC_EQUAL(abs(v), applyUnaryFn(v, [](float x) { return std::abs(x);} ));
ASSERT_VEC_EQUAL(-v, applyUnaryFn(v, [](float x) { return 0 - x;} ));
ASSERT_VEC_EQUAL(floor(v), applyUnaryFn(v, [](float x) { return std::floor(x);} ));
ASSERT_VEC_EQUAL(ceil(v), applyUnaryFn(v, [](float x) { return std::ceil(x);} ));
ASSERT_VEC_EQUAL(round(v), applyUnaryFn(v, [](float x) { return std::round(x);} ));
// Borrow a few other functions to test sqrt neatly.
const auto positiveValue = abs(v) + 1;
ASSERT_VEC_ALMOST_EQUAL(sqrt(positiveValue * positiveValue), positiveValue);
ASSERT_VEC_ALMOST_EQUAL(rsqrt(positiveValue * positiveValue), 1.0f / abs(positiveValue));
}
template<typename FVEC>
void TestFvec<FVEC>::testBinaryOps() const {
const auto v0 = getRandomFvec();
const auto v1 = getRandomFvec();
// Note that most of these are exact comparisons because all these SIMD operators are
// just applying the scalar operator, so there should be no loss of precision. The one
// exception is division, which does often do something slightly different
// since division is an expensive operation (e.g., multiply by reciprocal).
// Binary operators.
ASSERT_VEC_EQUAL(v0 + v1, applyBinaryFn(v0, v1, std::plus<float>()));
ASSERT_VEC_EQUAL(v0 - v1, applyBinaryFn(v0, v1, std::minus<float>()));
ASSERT_VEC_EQUAL(v0 * v1, applyBinaryFn(v0, v1, std::multiplies<float>()));
ASSERT_VEC_ALMOST_EQUAL(v0 / v1, applyBinaryFn(v0, v1, std::divides<float>()));
// Assignment operators.
auto addAssign = v0;
addAssign += v1;
ASSERT_VEC_EQUAL(addAssign, applyBinaryFn(v0, v1, std::plus<float>()));
auto subAssign = v0;
subAssign -= v1;
ASSERT_VEC_EQUAL(subAssign, applyBinaryFn(v0, v1, std::minus<float>()));
auto mulAssign = v0;
mulAssign *= v1;
ASSERT_VEC_EQUAL(mulAssign, applyBinaryFn(v0, v1, std::multiplies<float>()));
auto divAssign = v0;
divAssign /= v1;
ASSERT_VEC_ALMOST_EQUAL(divAssign, applyBinaryFn(v0, v1, std::divides<float>()));
// Binary ops between SIMD and scalar.
const float f = getRandomFloat();
const FVEC fdup(f);
ASSERT_VEC_EQUAL(v0 + f, applyBinaryFn(v0, fdup, std::plus<float>()));
ASSERT_VEC_EQUAL(f + v0, applyBinaryFn(fdup, v0, std::plus<float>()));
ASSERT_VEC_EQUAL(v0 - f, applyBinaryFn(v0, fdup, std::minus<float>()));
ASSERT_VEC_EQUAL(f - v0, applyBinaryFn(fdup, v0, std::minus<float>()));
ASSERT_VEC_EQUAL(v0 * f, applyBinaryFn(v0, fdup, std::multiplies<float>()));
ASSERT_VEC_EQUAL(f * v0, applyBinaryFn(fdup, v0, std::multiplies<float>()));
ASSERT_VEC_ALMOST_EQUAL(v0 / f, applyBinaryFn(v0, fdup, std::divides<float>()));
ASSERT_VEC_ALMOST_EQUAL(f / v0, applyBinaryFn(fdup, v0, std::divides<float>()));
// Binary functions.
using std::min;
using std::max;
ASSERT_VEC_EQUAL(min(v0, v1),
applyBinaryFn(v0, v1, [](float x, float y) { return min(x, y); }));
ASSERT_VEC_EQUAL(max(v0, v1),
applyBinaryFn(v0, v1, [](float x, float y) { return max(x, y); }));
}
template<typename FVEC>
void TestFvec<FVEC>::testTranspose() const {
// A table of random data to transpose.
float table[numElements * 4];
for (auto& e : table) e = std::round(getRandomFloat());
// Load the table row data into vectors.
const auto i0 = FVEC(table + 0 * numElements);
const auto i1 = FVEC(table + 1 * numElements);
const auto i2 = FVEC(table + 2 * numElements);
const auto i3 = FVEC(table + 3 * numElements);
// Manually transpose the data.
std::array<float, numElements * 4> expectedTranspose;
for (auto r=0; r<4; ++r)
{
for (auto c=0; c<numElements; ++c)
{
expectedTranspose[c * 4 + r] = table[r * numElements + c];
}
}
fvec4 computedTranspose[numElements];
transpose(i0, i1, i2, i3, computedTranspose);
ASSERT_VEC_EQUAL(computedTranspose, expectedTranspose);
FVEC o0, o1, o2, o3;
transpose(computedTranspose, o0, o1, o2, o3);
ASSERT_VEC_EQUAL(i0, o0);
ASSERT_VEC_EQUAL(i1, o1);
ASSERT_VEC_EQUAL(i2, o2);
ASSERT_VEC_EQUAL(i3, o3);
}
template<typename FVEC>
void TestFvec<FVEC>::testBlendAndCompare() const {
const FVEC zero = {};
const FVEC allOne(1.0f);
const FVEC allTwo(2.0f);
// Note that different targets use different types of mask, so rather than checking
// the mask directly, instead check the output of using the mask as a blend to provide
// an indirect test.
const auto maskNone = FVEC::expandBitsToMask(0);
ASSERT_VEC_EQUAL(blend(allOne, allTwo, maskNone), allOne);
ASSERT_VEC_EQUAL(blendZero(allOne, maskNone), zero);
const auto maskAll = FVEC::expandBitsToMask(-1);
ASSERT_VEC_EQUAL(blend(allOne, allTwo, maskAll), allTwo);
ASSERT_VEC_EQUAL(blendZero(allOne, maskAll), allOne);
// Repeating pattern big enough to do most SIMD lengths.
const int bitmask = 0b1100001101101001;
const auto maskSome = FVEC::expandBitsToMask(bitmask);
float expectedMaskSome[numElements];
float expectedZeroMaskSome[numElements];
for (int i=0; i<numElements; ++i)
{
expectedMaskSome[i] = (bitmask & (1 << i)) ? 2.0f : 1.0f;
expectedZeroMaskSome[i] = (bitmask & (1 << i)) ? 2.0f : 0.0f;
}
ASSERT_VEC_EQUAL(blend(allOne, allTwo, maskSome), expectedMaskSome);
ASSERT_VEC_EQUAL(blendZero(allTwo, maskSome), expectedZeroMaskSome);
// Test comparisons too, using random numbers, and then blending in either 0 or 1.
const auto v0 = getRandomFvec();
const auto v1 = getRandomFvec();
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 < v1),
applyBinaryFn(v0, v1, [](float x, float y) { return x < y ? 2.0f : 1.0f; }));
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 <= v1),
applyBinaryFn(v0, v1, [](float x, float y) { return x <= y ? 2.0f : 1.0f; }));
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 <= v0), allTwo);
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 > v1),
applyBinaryFn(v0, v1, [](float x, float y) { return x > y ? 2.0f : 1.0f; }));
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 >= v1),
applyBinaryFn(v0, v1, [](float x, float y) { return x >= y ? 2.0f : 1.0f; }));
ASSERT_VEC_EQUAL(blend(allOne, allTwo, v0 >= v0), allTwo);
}
template<typename FVEC>
void TestFvec<FVEC>::testUtilities() const {
/** Use rounded (i.e., integer) values for the reductions. Reduction operations are very sensitive
* to ordering. The correct result is found by sorting values into ascending order to ensure that
* similar sized numbers are accumulated earlier than less similar numbers. If completely random
* numbers were used, this effect would show up here, making it more a test of what random numbers
* you got, than of the code itself. By rounding to integers, the numbers will behave sanely for the
* reduction, meaning it is a test of the reduction, and not of the format.
*/
const auto v0 = round(getRandomFvec());
const auto v1 = round(getRandomFvec());
const auto v2 = round(getRandomFvec());
const float* v0p = (const float*)&v0;
const float* v1p = (const float*)&v1;
const float* v2p = (const float*)&v2;
const auto expectedRedAddV0 = std::accumulate(v0p, v0p + numElements, 0.0f);
const auto expectedRedAddV1 = std::accumulate(v1p, v1p + numElements, 0.0f);
const auto expectedRedAddV2 = std::accumulate(v2p, v2p + numElements, 0.0f);
ASSERT_VEC_EQUAL(reduceAdd(v0), expectedRedAddV0);
// Reduction of three vectors by addition into a single 3-element vector. Note that the final element
// of the reduction is undefined, so the expected value copies over whatever that undefined value is.
const auto computedRed3 = reduceToVec3(v0, v1, v2);
const auto expectedRed3 = fvec4(expectedRedAddV0, expectedRedAddV1, expectedRedAddV2, computedRed3[3]);
ASSERT_VEC_EQUAL(computedRed3, expectedRed3);
}
\ No newline at end of file
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