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Added sign function implementations and performance tests

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This commit is contained in:
Christophe Riccio 2014-10-28 20:31:39 +01:00
parent a88d8935be
commit d07a846539
1 changed files with 54 additions and 0 deletions
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54
test/core/core_func_common.cpp
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@ -739,6 +739,60 @@ int test_isinf()
return Error;
}
namespace sign
{
template <typename genFIType>
GLM_FUNC_QUALIFIER genFIType sign_if(genFIType x)
{
GLM_STATIC_ASSERT(
std::numeric_limits<genFIType>::is_iec559 ||
(std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer), "'sign' only accept signed inputs");
genFIType result;
if(x > genFIType(0))
result = genFIType(1);
else if(x < genFIType(0))
result = genFIType(-1);
else
result = genFIType(0);
return result;
}
template <typename genFIType>
GLM_FUNC_QUALIFIER genFIType sign_alu1(genFIType x)
{
GLM_STATIC_ASSERT(
std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer,
"'sign' only accept integer inputs");
return (x >> 31) | (-x >> 31);
}
template <typename genFIType>
GLM_FUNC_QUALIFIER genFIType sign_alu2(genFIType x)
{
GLM_STATIC_ASSERT(
std::numeric_limits<genFIType>::is_signed && std::numeric_limits<genFIType>::is_integer,
"'sign' only accept integer inputs");
return -(x >> 31) | (-x >> 31);
}
int test()
{
int Error = 0;
return Error;
}
int perf()
{
int Error = 0;
return Error;
}
}//namespace sign
int main()
{
int Error(0);