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Updated SIMD benchmark.

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This commit is contained in:
Branimir Karadžić
2017-02-27 20:00:28 -08:00
parent 9e02183e63
commit b2d34254a7
1 changed files with 39 additions and 21 deletions
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60
tests/simd_bench.cpp
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@@ -43,24 +43,8 @@ void simd_rsqrt_bench(bx::simd128_t* _dst, bx::simd128_t* _src, uint32_t _numVer
}
}
void simd_bench()
void simd_bench_pass(bx::simd128_t* _dst, bx::simd128_t* _src, uint32_t _numVertices)
{
bx::CrtAllocator allocator;
bx::RngMwc rng;
const uint32_t numVertices = 1024*1024;
uint8_t* data = (uint8_t*)BX_ALIGNED_ALLOC(&allocator, 2*numVertices*sizeof(bx::simd128_t), 16);
bx::simd128_t* src = (bx::simd128_t*)data;
bx::simd128_t* dst = &src[numVertices];
for (uint32_t ii = 0; ii < numVertices; ++ii)
{
float* ptr = (float*)&src[ii];
randUnitSphere(ptr, &rng);
ptr[3] = 1.0f;
}
const uint32_t numIterations = 10;
{
@@ -69,7 +53,7 @@ void simd_bench()
{
flushCache();
elapsed += -bx::getHPCounter();
simd_rsqrt_bench<bx::simd_rsqrt_est>(dst, src, numVertices);
simd_rsqrt_bench<bx::simd_rsqrt_est>(_dst, _src, _numVertices);
elapsed += bx::getHPCounter();
}
printf(" simd_rsqrt_est: %15f\n", double(elapsed) );
@@ -81,7 +65,7 @@ void simd_bench()
{
flushCache();
elapsed += -bx::getHPCounter();
simd_rsqrt_bench<bx::simd_rsqrt_nr>(dst, src, numVertices);
simd_rsqrt_bench<bx::simd_rsqrt_nr>(_dst, _src, _numVertices);
elapsed += bx::getHPCounter();
}
printf(" simd_rsqrt_nr: %15f\n", double(elapsed) );
@@ -93,7 +77,7 @@ void simd_bench()
{
flushCache();
elapsed += -bx::getHPCounter();
simd_rsqrt_bench<bx::simd_rsqrt_carmack>(dst, src, numVertices);
simd_rsqrt_bench<bx::simd_rsqrt_carmack>(_dst, _src, _numVertices);
elapsed += bx::getHPCounter();
}
printf("simd_rsqrt_carmack: %15f\n", double(elapsed) );
@@ -105,11 +89,45 @@ void simd_bench()
{
flushCache();
elapsed += -bx::getHPCounter();
simd_rsqrt_bench<bx::simd_rsqrt>(dst, src, numVertices);
simd_rsqrt_bench<bx::simd_rsqrt>(_dst, _src, _numVertices);
elapsed += bx::getHPCounter();
}
printf(" simd_rsqrt: %15f\n", double(elapsed) );
}
}
void simd_bench()
{
bx::CrtAllocator allocator;
bx::RngMwc rng;
const uint32_t numVertices = 1024*1024;
uint8_t* data = (uint8_t*)BX_ALIGNED_ALLOC(&allocator, 2*numVertices*sizeof(bx::simd128_t), 16);
bx::simd128_t* src = (bx::simd128_t*)data;
bx::simd128_t* dst = &src[numVertices];
printf("\n -- positive & negative --\n");
for (uint32_t ii = 0; ii < numVertices; ++ii)
{
float* ptr = (float*)&src[ii];
randUnitSphere(ptr, &rng);
ptr[3] = 1.0f;
}
simd_bench_pass(dst, src, numVertices);
printf("\n -- positive only --\n");
for (uint32_t ii = 0; ii < numVertices; ++ii)
{
float* ptr = (float*)&src[ii];
ptr[0] = bx::fabsolute(ptr[0]);
ptr[1] = bx::fabsolute(ptr[1]);
ptr[2] = bx::fabsolute(ptr[2]);
ptr[3] = bx::fabsolute(ptr[3]);
}
simd_bench_pass(dst, src, numVertices);
BX_ALIGNED_FREE(&allocator, data, 16);
}