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Removing reliance on fmodf and fabsf CRT functions.

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This commit is contained in:
Branimir Karadžić
2018-01-04 08:59:17 -08:00
parent 9545b84119
commit fddf8c3303
3 changed files with 24 additions and 10 deletions
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10
include/bx/inline/math.inl
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@@ -102,6 +102,11 @@ namespace bx
return _a + (_b - _a) * _t;
}
inline float fabs(float _a)
{
return _a < 0.0f ? -_a : _a;
}
inline float fsign(float _a)
{
return _a < 0.0f ? -1.0f : 1.0f;
@@ -132,6 +137,11 @@ namespace bx
return _a - ffloor(_a);
}
inline float fmod(float _a, float _b)
{
return _a - _b * ffloor(_a / _b);
}
inline bool fequal(float _a, float _b, float _epsilon)
{
// http://realtimecollisiondetection.net/blog/?p=89

10
src/math.cpp
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@@ -22,11 +22,6 @@ namespace bx
const float kHuge = HUGE_VALF;
#endif // BX_COMPILER_MSVC
float fabs(float _a)
{
return ::fabsf(_a);
}
float fsin(float _a)
{
return ::sinf(_a);
@@ -82,11 +77,6 @@ namespace bx
return ::ceilf(_f);
}
float fmod(float _a, float _b)
{
return ::fmodf(_a, _b);
}
void mtxLookAtImpl(float* _result, const float* _eye, const float* _view, const float* _up)
{
float up[3] = { 0.0f, 1.0f, 0.0f };

14
tests/math_test.cpp
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@@ -32,6 +32,20 @@ TEST_CASE("flog2", "")
flog2_test(256.0f);
}
TEST_CASE("fmod", "")
{
REQUIRE(389.0f == bx::fmod(1389.0f, 1000.0f) );
REQUIRE(bx::isNan(bx::fmod(0.0f, 0.0f) ) );
}
TEST_CASE("fabs", "")
{
REQUIRE(1389.0f == bx::fabs(-1389.0f) );
REQUIRE(1389.0f == bx::fabs( 1389.0f) );
REQUIRE( 0.0f == bx::fabs(-0.0f) );
REQUIRE( 0.0f == bx::fabs( 0.0f) );
}
TEST_CASE("ToBits", "")
{
REQUIRE(UINT32_C(0x12345678) == bx::floatToBits( bx::bitsToFloat( UINT32_C(0x12345678) ) ) );