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Added Z-order experiments

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master
Christophe Riccio ago%!(EXTRA string=8 years)
parent ff64d51a1c
commit 96adec5f5e
1 changed files with 100 additions and 17 deletions
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  1. 117
      test/gtc/gtc_bitfield.cpp

117
test/gtc/gtc_bitfield.cpp
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@ -628,9 +628,9 @@ namespace bitfieldInterleave5
GLM_FUNC_QUALIFIER glm::uint16 bitfieldInterleave_u8vec2(glm::uint8 x, glm::uint8 y)
{
glm::uint32 Result = (glm::uint32(y) << 16) | glm::uint32(x);
Result = ((Result << 4) | Result) & glm::uint32(0x0F0F0F0F);
Result = ((Result << 2) | Result) & glm::uint32(0x33333333);
Result = ((Result << 1) | Result) & glm::uint32(0x55555555);
Result = ((Result << 4) | Result) & 0x0F0F0F0F;
Result = ((Result << 2) | Result) & 0x33333333;
Result = ((Result << 1) | Result) & 0x55555555;
return static_cast<glm::uint16>((Result & 0x0000FFFF) | (Result >> 15));
}
@ -638,28 +638,34 @@ namespace bitfieldInterleave5
{
glm::uint32 Result(InterleavedBitfield);
Result = ((Result << 15) | Result) & 0x55555555;
Result = ((Result >> 1) | Result) & glm::uint32(0x33333333);
Result = ((Result >> 2) | Result) & glm::uint32(0x0F0F0F0F);
Result = ((Result >> 4) | Result) & glm::uint32(0x00FF00FF);
Result = ((Result >> 1) | Result) & 0x33333333;
Result = ((Result >> 2) | Result) & 0x0F0F0F0F;
Result = ((Result >> 4) | Result) & 0x00FF00FF;
return glm::u8vec2(Result & 0x0000FFFF, Result >> 16);
}
GLM_FUNC_QUALIFIER glm::uint32 bitfieldInterleave_u8vec4(glm::uint8 x, glm::uint8 y, glm::uint8 z, glm::uint8 w)
{
glm::uint64 Result = (glm::uint64(w) << 48) | (glm::uint64(z) << 32) | (glm::uint64(y) << 16) | glm::uint64(x);
Result = ((Result << 4) | Result) & 0x0F0F0F0F0F0F0F0Full;
Result = ((Result << 2) | Result) & 0x3333333333333333ull;
Result = ((Result << 1) | Result) & 0x5555555555555555ull;
return static_cast<glm::uint32>((Result & 0x0000FFFF) | (Result >> 15));
Result = ((Result << 12) | Result) & 0x000F000F000F000Full;
Result = ((Result << 6) | Result) & 0x0303030303030303ull;
Result = ((Result << 3) | Result) & 0x1111111111111111ull;
const glm::uint32 a = static_cast<glm::uint32>((Result & 0x000000000000FFFF) >> ( 0 - 0));
const glm::uint32 b = static_cast<glm::uint32>((Result & 0x00000000FFFF0000) >> (16 - 3));
const glm::uint32 c = static_cast<glm::uint32>((Result & 0x0000FFFF00000000) >> (32 - 6));
const glm::uint32 d = static_cast<glm::uint32>((Result & 0xFFFF000000000000) >> (48 - 12));
return a | b | c | d;
}
GLM_FUNC_QUALIFIER glm::u8vec4 bitfieldDeinterleave_u8vec4(glm::uint32 InterleavedBitfield)
{
glm::uint64 Result(InterleavedBitfield);
Result = ((Result << 15) | Result) & 0x5555555555555555ull;
Result = ((Result >> 1) | Result) & 0x3333333333333333ull;
Result = ((Result >> 2) | Result) & 0x0F0F0F0F0F0F0F0Full;
Result = ((Result >> 4) | Result) & 0x00FF00FF00FF00FFull;
Result = ((Result << 15) | Result) & 0x9249249249249249ull;
Result = ((Result >> 1) | Result) & 0x30C30C30C30C30C3ull;
Result = ((Result >> 2) | Result) & 0xF00F00F00F00F00Full;
Result = ((Result >> 4) | Result) & 0x00FF0000FF0000FFull;
return glm::u8vec4(
(Result >> 0) & 0x000000000000FFFFull,
(Result >> 16) & 0x00000000FFFF0000ull,
@ -707,10 +713,24 @@ namespace bitfieldInterleave5
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
{
glm::uint32 A = bitfieldInterleave_u16vec2(glm::uint16(i), glm::uint16(j));
glm::u8vec2 C = bitfieldDeinterleave_u8vec2(A);
glm::uint32 A = bitfieldInterleave_u8vec4(glm::uint8(i), glm::uint8(j), glm::uint8(i), glm::uint8(j));
glm::uint32 B = glm::bitfieldInterleave(glm::uint8(i), glm::uint8(j), glm::uint8(i), glm::uint8(j));
Error += A == B ? 0 : 1;
/*
glm::u8vec4 C = bitfieldDeinterleave_u8vec4(A);
Error += C.x == glm::uint8(i) ? 0 : 1;
Error += C.y == glm::uint8(j) ? 0 : 1;
Error += C.z == glm::uint8(i) ? 0 : 1;
Error += C.w == glm::uint8(j) ? 0 : 1;
*/
}
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
{
glm::uint32 A = bitfieldInterleave_u16vec2(glm::uint16(i), glm::uint16(j));
glm::uint32 B = glm::bitfieldInterleave(glm::uint16(i), glm::uint16(j));
Error += A == B ? 0 : 1;
}
return Error;
@ -729,7 +749,7 @@ namespace bitfieldInterleave5
const std::clock_t EndTime = std::clock();
std::printf("glm::bitfieldInterleave Time %d clocks\n", static_cast<unsigned int>(EndTime - BeginTime));
std::printf("glm::bitfieldInterleave<u8vec2> Time %d clocks\n", static_cast<unsigned int>(EndTime - BeginTime));
return Error;
}
@ -752,6 +772,60 @@ namespace bitfieldInterleave5
return Error;
}
int perf_old_u8vec4(std::vector<glm::uint32>& Result)
{
int Error = 0;
const std::clock_t BeginTime = std::clock();
for(glm::size_t k = 0; k < 10000; ++k)
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
Error += Result[j * 256 + i] == glm::bitfieldInterleave(glm::uint8(i), glm::uint8(j), glm::uint8(i), glm::uint8(j)) ? 0 : 1;
const std::clock_t EndTime = std::clock();
std::printf("glm::bitfieldInterleave<u8vec4> Time %d clocks\n", static_cast<unsigned int>(EndTime - BeginTime));
return Error;
}
int perf_new_u8vec4(std::vector<glm::uint32>& Result)
{
int Error = 0;
const std::clock_t BeginTime = std::clock();
for(glm::size_t k = 0; k < 10000; ++k)
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
Error += Result[j * 256 + i] == bitfieldInterleave_u8vec4(glm::uint8(i), glm::uint8(j), glm::uint8(i), glm::uint8(j)) ? 0 : 1;
const std::clock_t EndTime = std::clock();
std::printf("bitfieldInterleave_u8vec4 Time %d clocks\n", static_cast<unsigned int>(EndTime - BeginTime));
return Error;
}
int perf_old_u16vec2(std::vector<glm::uint32>& Result)
{
int Error = 0;
const std::clock_t BeginTime = std::clock();
for(glm::size_t k = 0; k < 10000; ++k)
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
Error += Result[j * 256 + i] == glm::bitfieldInterleave(glm::uint16(i), glm::uint16(j)) ? 0 : 1;
const std::clock_t EndTime = std::clock();
std::printf("glm::bitfieldInterleave<u16vec2> Time %d clocks\n", static_cast<unsigned int>(EndTime - BeginTime));
return Error;
}
int perf_new_u16vec2(std::vector<glm::uint32>& Result)
{
int Error = 0;
@ -784,11 +858,20 @@ namespace bitfieldInterleave5
Error += perf_old_u8vec2(Result_u8vec2);
Error += perf_new_u8vec2(Result_u8vec2);
std::vector<glm::uint32> Result_u8vec4(256 * 256, 0);
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
Result_u8vec4[j * 256 + i] = glm::bitfieldInterleave(glm::uint8(i), glm::uint8(j), glm::uint8(i), glm::uint8(j));
Error += perf_old_u8vec4(Result_u8vec4);
Error += perf_new_u8vec4(Result_u8vec4);
std::vector<glm::uint32> Result_u16vec2(256 * 256, 0);
for(glm::size_t j = 0; j < 256; ++j)
for(glm::size_t i = 0; i < 256; ++i)
Result_u16vec2[j * 256 + i] = glm::bitfieldInterleave(glm::uint16(i), glm::uint16(j));
Error += perf_old_u16vec2(Result_u16vec2);
Error += perf_new_u16vec2(Result_u16vec2);
std::printf("bitfieldInterleave perf: %d Errors\n", Error);

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