#include <math.h>

#include "mtest.h"

#include "test.h"

enum {LESS,EQUAL,GREATER,UNORD};

#define TEST(f,want) do{ \

	int r, e; \

	feclearexcept(FE_ALL_EXCEPT); \

	r = (f); \

	e = fetestexcept(FE_ALL_EXCEPT); \

	if (r != (want)) \

		t_error(#f " failed: got %d want %d\n", r, (want)); \

	if (e & INVALID) \

		t_error(#f " raised the invalid exception\n"); \

}while(0)

#undef T

#define T(a,b,rel) do{ \

	TEST(isunordered(a, b), rel == UNORD); \

	TEST(isless(a, b), rel == LESS); \

	TEST(islessequal(a, b), rel == LESS || rel == EQUAL); \

	TEST(islessgreater(a, b), rel == LESS || rel == GREATER); \

	TEST(isgreater(a, b), rel == GREATER); \

	TEST(isgreaterequal(a, b), rel == GREATER || rel == EQUAL); \

}while(0)

int main()

{

	#pragma STDC FENV_ACCESS ON

	volatile double huge = DBL_MAX;

	volatile double tiny = DBL_MIN;

	volatile double eps = DBL_EPSILON;

	volatile float hugef = FLT_MAX;

	volatile float tinyf = FLT_MIN;

	volatile float epsf = FLT_EPSILON;

	volatile long double hugel = LDBL_MAX;

	volatile long double tinyl = LDBL_MIN;

	volatile long double epsl = LDBL_EPSILON;

	T(nan, 1.0, UNORD);

	T(1.0, nan, UNORD);

	T(nan, nan, UNORD);

	T(nan, nan+1.0, UNORD);

	T(nan, nan+1.0L, UNORD);

	T(1.0, 1.1, LESS);

	T(1.0, 1.0+eps, LESS);

	T(1.0+eps, 1.0, GREATER);

	T(huge-1, huge, EQUAL);

	T(huge, huge*huge, LESS);

	T(-0.0, 0.0, EQUAL);

	T(-tiny, 0.0, LESS);

	T(tiny, 2*tiny, LESS);

	T(tiny*0x1p-9, tiny*0x1p-8, LESS);

	T(1.0f, 1.1f, LESS);

	T(1.0f, 1.0f+epsf, LESS);

	T(1.0f+epsf, 1.0f, GREATER);

	T(hugef-1, hugef, EQUAL);

	T(hugef, hugef*hugef, LESS);

	T(-0.0f, 0.0f, EQUAL);

	T(-tinyf, 0.0f, LESS);

	T(tinyf, 2*tinyf, LESS);

	T(tinyf*0x1p-9f, tinyf*0x1p-8f, LESS);

	T(1.0L, 1.1L, LESS);

	T(1.0L, 1.0L+epsl, LESS);

	T(1.0L+epsl, 1.0L, GREATER);

	T(hugel-1, hugel, EQUAL);

	T(hugel, hugel*hugel, LESS);

	T(-0.0L, 0.0L, EQUAL);

	T(-tinyl, 0.0L, LESS);

	T(tinyl, 2*tinyl, LESS);

	T(tinyl*0x1p-9L, tinyl*0x1p-8L, LESS);

#if FLT_EVAL_METHOD == 2

	T(huge*huge, huge*huge*2, LESS);

	T(tiny*tiny*0.5, tiny*tiny, LESS);

	T(-tiny*tiny, 0.0, LESS);

	T(1.0, 1.0+eps*0.25, LESS);

#else

	T(huge*huge, huge*huge*2, EQUAL);

	T(tiny*tiny*0.5, tiny*tiny, EQUAL);

	T(-tiny*tiny, 0.0, EQUAL);

	T(1.0, 1.0+eps*0.25, EQUAL);

#endif

#if FLT_EVAL_METHOD >= 1

	T(hugef*hugef, hugef*hugef*2, LESS);

	T(tinyf*tinyf*0.5f, tinyf*tinyf, LESS);

	T(-tinyf*tinyf, 0.0f, LESS);

	T(1.0f, 1.0f+epsf*0.25f, LESS);

#else

	T(hugef*hugef, hugef*hugef*2, EQUAL);

	T(tinyf*tinyf*0.5f, tinyf*tinyf, EQUAL);

	T(-tinyf*tinyf, 0.0f, EQUAL);

	T(1.0f, 1.0f+epsf*0.25f, EQUAL);

#endif

	T(hugel*hugel, hugel*hugel*2, EQUAL);

	T(tinyl*tinyl*0.5L, tinyl*tinyl, EQUAL);

	T(-tinyl*tinyl, 0.0L, EQUAL);

	T(1.0L, 1.0L+epsl*0.25L, EQUAL);

	return t_status;

}