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Fix aliasing

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This commit is contained in:
posophe 2015-11-16 15:41:41 +01:00
parent 8e20c5bda1
commit 80d5ca6c4c
1 changed files with 48 additions and 22 deletions
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70
test/core/core_func_common.cpp
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@ -222,7 +222,8 @@ namespace floatBitsToInt
float A = 1.0f; float A = 1.0f;
int B = glm::floatBitsToInt(A); int B = glm::floatBitsToInt(A);
float C = glm::intBitsToFloat(B); float C = glm::intBitsToFloat(B);
int D = *(int*)&A; int D;
std::memcpy(&D, &A, sizeof(D));
Error += B == D ? 0 : 1; Error += B == D ? 0 : 1;
Error += A == C ? 0 : 1; Error += A == C ? 0 : 1;
} }
@ -231,8 +232,11 @@ namespace floatBitsToInt
glm::vec2 A(1.0f, 2.0f); glm::vec2 A(1.0f, 2.0f);
glm::ivec2 B = glm::floatBitsToInt(A); glm::ivec2 B = glm::floatBitsToInt(A);
glm::vec2 C = glm::intBitsToFloat(B); glm::vec2 C = glm::intBitsToFloat(B);
Error += B.x == *(int*)&(A.x) ? 0 : 1; int D;
Error += B.y == *(int*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.x == D ? 0 : 1;
std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -240,9 +244,13 @@ namespace floatBitsToInt
glm::vec3 A(1.0f, 2.0f, 3.0f); glm::vec3 A(1.0f, 2.0f, 3.0f);
glm::ivec3 B = glm::floatBitsToInt(A); glm::ivec3 B = glm::floatBitsToInt(A);
glm::vec3 C = glm::intBitsToFloat(B); glm::vec3 C = glm::intBitsToFloat(B);
Error += B.x == *(int*)&(A.x) ? 0 : 1; int D;
Error += B.y == *(int*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.z == *(int*)&(A.z) ? 0 : 1; Error += B.x == D ? 0 : 1;
std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
std::memcpy(&D, &A.z, sizeof(D));
Error += B.z == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -250,10 +258,15 @@ namespace floatBitsToInt
glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f); glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f);
glm::ivec4 B = glm::floatBitsToInt(A); glm::ivec4 B = glm::floatBitsToInt(A);
glm::vec4 C = glm::intBitsToFloat(B); glm::vec4 C = glm::intBitsToFloat(B);
Error += B.x == *(int*)&(A.x) ? 0 : 1; int D;
Error += B.y == *(int*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.z == *(int*)&(A.z) ? 0 : 1; Error += B.x == D ? 0 : 1;
Error += B.w == *(int*)&(A.w) ? 0 : 1; std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
std::memcpy(&D, &A.z, sizeof(D));
Error += B.z == D ? 0 : 1;
std::memcpy(&D, &A.w, sizeof(D));
Error += B.w == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -271,7 +284,9 @@ namespace floatBitsToUint
float A = 1.0f; float A = 1.0f;
glm::uint B = glm::floatBitsToUint(A); glm::uint B = glm::floatBitsToUint(A);
float C = glm::intBitsToFloat(B); float C = glm::intBitsToFloat(B);
Error += B == *(glm::uint*)&A ? 0 : 1; glm::uint D;
std::memcpy(&D, &A, sizeof(D));
Error += B == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -279,8 +294,11 @@ namespace floatBitsToUint
glm::vec2 A(1.0f, 2.0f); glm::vec2 A(1.0f, 2.0f);
glm::uvec2 B = glm::floatBitsToUint(A); glm::uvec2 B = glm::floatBitsToUint(A);
glm::vec2 C = glm::uintBitsToFloat(B); glm::vec2 C = glm::uintBitsToFloat(B);
Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1; glm::uint D;
Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.x == D ? 0 : 1;
std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
Error += A == C ? 0 : 1; Error += A == C ? 0 : 1;
} }
@ -288,9 +306,13 @@ namespace floatBitsToUint
glm::vec3 A(1.0f, 2.0f, 3.0f); glm::vec3 A(1.0f, 2.0f, 3.0f);
glm::uvec3 B = glm::floatBitsToUint(A); glm::uvec3 B = glm::floatBitsToUint(A);
glm::vec3 C = glm::uintBitsToFloat(B); glm::vec3 C = glm::uintBitsToFloat(B);
Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1; glm::uint D;
Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.z == *(glm::uint*)&(A.z) ? 0 : 1; Error += B.x == D ? 0 : 1;
std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
std::memcpy(&D, &A.z, sizeof(D));
Error += B.z == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -298,10 +320,15 @@ namespace floatBitsToUint
glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f); glm::vec4 A(1.0f, 2.0f, 3.0f, 4.0f);
glm::uvec4 B = glm::floatBitsToUint(A); glm::uvec4 B = glm::floatBitsToUint(A);
glm::vec4 C = glm::uintBitsToFloat(B); glm::vec4 C = glm::uintBitsToFloat(B);
Error += B.x == *(glm::uint*)&(A.x) ? 0 : 1; glm::uint D;
Error += B.y == *(glm::uint*)&(A.y) ? 0 : 1; std::memcpy(&D, &A.x, sizeof(D));
Error += B.z == *(glm::uint*)&(A.z) ? 0 : 1; Error += B.x == D ? 0 : 1;
Error += B.w == *(glm::uint*)&(A.w) ? 0 : 1; std::memcpy(&D, &A.y, sizeof(D));
Error += B.y == D ? 0 : 1;
std::memcpy(&D, &A.z, sizeof(D));
Error += B.z == D ? 0 : 1;
std::memcpy(&D, &A.w, sizeof(D));
Error += B.w == D ? 0 : 1;
Error += A == C? 0 : 1; Error += A == C? 0 : 1;
} }
@ -1100,7 +1127,7 @@ namespace sign
{ {
int Error = 0; int Error = 0;
glm::int32 const Count = static_cast<glm::int32>(Samples); glm::uint32 const Count = Samples;
std::clock_t Timestamp0 = std::clock(); std::clock_t Timestamp0 = std::clock();
glm::int32 Sum = 0; glm::int32 Sum = 0;
@ -1179,4 +1206,3 @@ int main()
return Error; return Error;
} }