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reactos/modules/rostests/apitests/crt/fpcontrol.c

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/*
* PROJECT: ReactOS api tests
* LICENSE: MIT (https://spdx.org/licenses/MIT)
* PURPOSE: Tests for fp control functions
* COPYRIGHT: Copyright 2022 Timo Kreuzer <timo.kreuzer@reactos.org>
*/
#include <ntstatus.h>
#define WIN32_NO_STATUS
#include <windows.h>
#include <apitest.h>
#include <xmmintrin.h>
#include <float.h>
#include <pseh/pseh2.h>
unsigned int get_native_fpcw(void)
{
#ifdef _M_AMD64
return _mm_getcsr();
#elif defined (_M_IX86)
unsigned short fpcw;
#if defined(_MSC_VER)
__asm fstsw[fpcw];
#else
__asm__ __volatile__("fstsw %0" : "=m" (fpcw) : );
#endif
return fpcw;
#else
#error "Unsupported architecture"
return 0;
#endif
}
void set_native_fpcw(unsigned int value)
{
#ifdef _M_AMD64
_mm_setcsr(value);
#elif defined (_M_IX86)
unsigned short fpcw = (unsigned short)value;
#if defined(_MSC_VER)
__asm fldcw[fpcw];
#else
__asm__ __volatile__("fldcw %0" : : "m" (fpcw));
#endif
#else
#error "Unsupported architecture"
#endif
}
/*
_clear87
_clearfp
_controlfp_s
_set_controlfp
_statusfp
__control87_2
*/
#ifdef _M_IX86
#define ON_IX86(x) x
#else
#define ON_IX86(x)
#endif
#ifdef _M_AMD64
#define ON_AMD64(x) x
#else
#define ON_AMD64(x)
#endif
#ifdef _M_ARM
#define ON_ARM(x) x
#else
#define ON_ARM(x)
#endif
struct
{
unsigned int Value;
unsigned int Mask;
unsigned int Result;
unsigned int Native;
} g_controlfp_Testcases[] =
{
{ 0xffffffff, 0xffffffff, ON_IX86(0x30e031f) ON_AMD64(0x308031f) ON_ARM(0), ON_IX86(0) ON_AMD64(0xff80) ON_ARM(0) },
{ 0, 0xffffffff, 0x80000, ON_IX86(0) ON_AMD64(0x100) ON_ARM(0) },
{ 0xffffffff, 0x14, 0x80014, ON_IX86(0) ON_AMD64(0x580) ON_ARM(0) },
{ _EM_INEXACT, 0xffffffff, _EM_INEXACT | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_INEXACT | _MM_MASK_DENORM) ON_ARM(0) },
{ _EM_UNDERFLOW, 0xffffffff, _EM_UNDERFLOW | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_UNDERFLOW | _MM_MASK_DENORM) ON_ARM(0) },
{ _EM_OVERFLOW, 0xffffffff, _EM_OVERFLOW | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_OVERFLOW | _MM_MASK_DENORM) ON_ARM(0) },
{ _EM_ZERODIVIDE, 0xffffffff, _EM_ZERODIVIDE | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_DIV_ZERO | _MM_MASK_DENORM) ON_ARM(0) },
{ _EM_INVALID, 0xffffffff, _EM_INVALID | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_INVALID | _MM_MASK_DENORM) ON_ARM(0) },
{ _RC_NEAR, 0xffffffff, _RC_NEAR | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_ROUND_NEAREST | _MM_MASK_DENORM) ON_ARM(0) },
{ _RC_DOWN, 0xffffffff, _RC_DOWN | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_ROUND_DOWN | _MM_MASK_DENORM) ON_ARM(0) },
{ _RC_UP, 0xffffffff, _RC_UP | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_ROUND_UP | _MM_MASK_DENORM) ON_ARM(0) },
{ _RC_CHOP, 0xffffffff, _RC_CHOP | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_ROUND_TOWARD_ZERO | _MM_MASK_DENORM) ON_ARM(0) },
{ _IC_AFFINE, 0xffffffff, _EM_DENORMAL ON_IX86(| _IC_AFFINE), ON_IX86(0) ON_AMD64(_MM_MASK_DENORM) ON_ARM(0)},
{ _IC_PROJECTIVE, 0xffffffff, _IC_PROJECTIVE | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_DENORM) ON_ARM(0) },
{ _DN_SAVE, 0xffffffff, _DN_SAVE | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_MASK_DENORM) ON_ARM(0) },
{ _DN_FLUSH, 0xffffffff, _DN_FLUSH | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_FLUSH_ZERO_ON | 0x40 | _MM_MASK_DENORM) ON_ARM(0) },
{ _DN_FLUSH_OPERANDS_SAVE_RESULTS, 0xffffffff, _DN_FLUSH_OPERANDS_SAVE_RESULTS | _EM_DENORMAL, ON_IX86(0) ON_AMD64(0x40 | _MM_MASK_DENORM) ON_ARM(0) },
{ _DN_SAVE_OPERANDS_FLUSH_RESULTS, 0xffffffff, _DN_SAVE_OPERANDS_FLUSH_RESULTS | _EM_DENORMAL, ON_IX86(0) ON_AMD64(_MM_FLUSH_ZERO_ON | _MM_MASK_DENORM) ON_ARM(0) },
};
void Test_controlfp(void)
{
unsigned int i, native_fpcw, fpcw;
for (i = 0; i < _countof(g_controlfp_Testcases); i++)
{
fpcw = _controlfp(g_controlfp_Testcases[i].Value, g_controlfp_Testcases[i].Mask);
ok(fpcw == g_controlfp_Testcases[i].Result, "[%u] _controlfp failed: expected 0x%x, got 0x%x\n", i, g_controlfp_Testcases[i].Result, fpcw);
native_fpcw = get_native_fpcw();
ok(native_fpcw == g_controlfp_Testcases[i].Native, "[%u] wrong native_fpcw: expected 0x%x, got 0x%x\n", i, g_controlfp_Testcases[i].Native, native_fpcw);
}
/* Restore sane state */
_fpreset();
}
#if defined(_M_IX86) || defined(_M_AMD64)
void Test_control87(void)
{
unsigned int native_fpcw, fpcw;
fpcw = _control87(0, 0xffffffff);
ok(fpcw == 0, "_control87 failed: expected 0x%x, got 0x%x\n", 0, fpcw);
native_fpcw = get_native_fpcw();
ok_hex(native_fpcw, ON_IX86(0) ON_AMD64(0));
/* Restore sane state */
_fpreset();
}
#endif
typedef enum _FP_OP
{
OP_Inexact,
OP_Underflow,
OP_Overflow,
OP_ZeroDivide,
OP_Invalid,
OP_Denormal
} FP_OP;
struct
{
FP_OP Operation;
unsigned int Fpcw;
unsigned int FpStatus;
unsigned int ExceptionCode;
unsigned int Native;
} g_exception_Testcases[] =
{
{ OP_Inexact, 0xffffffff, _SW_UNDERFLOW | _SW_INEXACT ON_IX86(| _SW_DENORMAL), 0, ON_IX86(0x32) ON_AMD64(0xffb0) ON_ARM(0)},
{ OP_Inexact, ~_EM_INEXACT, _SW_INEXACT ON_AMD64(| _SW_UNDERFLOW), STATUS_FLOAT_INEXACT_RESULT, ON_IX86(0x3800) ON_AMD64(0xefb0) ON_ARM(0)},
{ OP_Inexact, ~_MCW_EM, _SW_INEXACT ON_AMD64(| _SW_UNDERFLOW), ON_IX86(STATUS_FLOAT_INEXACT_RESULT) ON_AMD64(STATUS_FLOAT_UNDERFLOW) ON_ARM(STATUS_FLOAT_UNDERFLOW), ON_IX86(0x3800) ON_AMD64(0xe130) ON_ARM(0) },
{ OP_Underflow, 0xffffffff, _SW_UNDERFLOW | _SW_INEXACT, 0, ON_IX86(0x30) ON_AMD64(0xffb0) ON_ARM(0)},
{ OP_Underflow, ~_EM_UNDERFLOW, _SW_UNDERFLOW | _SW_INEXACT, STATUS_FLOAT_UNDERFLOW, ON_IX86(0x3800) ON_AMD64(0xf7b0) ON_ARM(0) },
{ OP_Underflow, ~_MCW_EM, _SW_INEXACT ON_AMD64(| _SW_UNDERFLOW), ON_IX86(STATUS_FLOAT_INEXACT_RESULT) ON_AMD64(STATUS_FLOAT_UNDERFLOW) ON_ARM(STATUS_FLOAT_UNDERFLOW), ON_IX86(0x3800) ON_AMD64(0xe130) ON_ARM(0) },
{ OP_Overflow, 0xffffffff, _SW_OVERFLOW | _SW_INEXACT, 0, ON_IX86(0x28) ON_AMD64(0xffa8) ON_ARM(0) },
{ OP_Overflow, ~_EM_OVERFLOW, _SW_OVERFLOW | _SW_INEXACT, STATUS_FLOAT_OVERFLOW, ON_IX86(0x3800) ON_AMD64(0xfba8) ON_ARM(0) },
{ OP_Overflow, ~_MCW_EM, _SW_INEXACT ON_AMD64(| _SW_OVERFLOW), ON_IX86(STATUS_FLOAT_INEXACT_RESULT) ON_AMD64(STATUS_FLOAT_OVERFLOW) ON_ARM(STATUS_FLOAT_OVERFLOW), ON_IX86(0x3800) ON_AMD64(0xe128) ON_ARM(0)},
{ OP_ZeroDivide, 0xffffffff, _SW_ZERODIVIDE, 0, ON_IX86(0x4) ON_AMD64(0xff84) ON_ARM(0) },
{ OP_ZeroDivide, ~_EM_ZERODIVIDE, _SW_ZERODIVIDE, STATUS_FLOAT_DIVIDE_BY_ZERO, ON_IX86(0x3000) ON_AMD64(0xfd84) ON_ARM(0) },
{ OP_ZeroDivide, ~_MCW_EM, _SW_ZERODIVIDE, STATUS_FLOAT_DIVIDE_BY_ZERO, ON_IX86(0x3000) ON_AMD64(0xe104) ON_ARM(0) },
{ OP_Invalid, 0xffffffff, _SW_INVALID, 0, ON_IX86(0x1) ON_AMD64(0xff81) ON_ARM(0) },
{ OP_Invalid, ~_EM_INVALID, _SW_INVALID, STATUS_FLOAT_INVALID_OPERATION, ON_IX86(0) ON_AMD64(0xff01) ON_ARM(0) },
{ OP_Invalid, ~_MCW_EM, _SW_INVALID, STATUS_FLOAT_INVALID_OPERATION, ON_IX86(0) ON_AMD64(0xe101) ON_ARM(0) },
#if defined(_M_IX86) || defined(_M_AMD64) // || defined(_M_ARM64) ?
{ OP_Denormal, 0xffffffff, _SW_DENORMAL | _SW_INEXACT ON_AMD64(| _SW_UNDERFLOW), 0, ON_IX86(0x22) ON_AMD64(0xffb2) ON_ARM(0)},
{ OP_Denormal, ~_EM_DENORMAL, _SW_DENORMAL, STATUS_FLOAT_INVALID_OPERATION, ON_IX86(0x3800) ON_AMD64(0xfe82) ON_ARM(0) },
{ OP_Denormal, ~_MCW_EM, _SW_DENORMAL, STATUS_FLOAT_INVALID_OPERATION, ON_IX86(0x3800) ON_AMD64(0xe002) ON_ARM(0) },
#endif
};
void Test_exceptions(void)
{
volatile double a, b;
unsigned long long ull;
volatile long status = 0;
unsigned int i, exp_fpstatus, native_fpcw, statusfp;
for (i = 0; i < _countof(g_exception_Testcases); i++)
{
/* Start clean */
status = 0;
_fpreset();
_clearfp();
ok_hex(_statusfp(), 0);
_controlfp(g_exception_Testcases[i].Fpcw, 0xffffffff);
#if defined(_M_IX86) || defined(_M_AMD64) // || defined(_M_ARM64) ?
if (g_exception_Testcases[i].Operation == OP_Denormal)
_control87(g_exception_Testcases[i].Fpcw, 0xffffffff);
#endif
_SEH2_TRY
{
switch (g_exception_Testcases[i].Operation)
{
case OP_Inexact:
a = 1e-40;
b = (float)(a + 1e-40);
break;
case OP_Underflow:
a = DBL_MIN;
b = a / 3.0e16;
break;
case OP_Overflow:
a = DBL_MAX;
b = a * 3.0;
break;
case OP_ZeroDivide:
a = 0.0;
b = 1.0 / a;
break;
case OP_Invalid:
ull = 0x7FF0000000000001ull;
a = *(double*)&ull;
b = a * 2;
break;
case OP_Denormal:
a = DBL_MIN;
b = a - 4.9406564584124654e-324;
break;
default:
(void)b;
}
native_fpcw = get_native_fpcw();
statusfp = _clearfp();
}
_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
#ifdef _M_IX86
/* On x86 we need to clear before doing any other fp operations, otherwise it will throw again */
statusfp = _clearfp();
native_fpcw = get_native_fpcw();
#else
native_fpcw = get_native_fpcw();
statusfp = _clearfp();
#endif
status = _SEH2_GetExceptionCode();
}
_SEH2_END;
exp_fpstatus = g_exception_Testcases[i].FpStatus;
ok(statusfp == exp_fpstatus, "[%u] Wrong value for _statusfp(). Expected 0x%lx, got 0x%lx\n", i, exp_fpstatus, statusfp);
ok(status == g_exception_Testcases[i].ExceptionCode, "[%u] Wrong value for status. Expected 0x%lx, got 0x%lx\n", i, g_exception_Testcases[i].ExceptionCode, status);
ok(native_fpcw == g_exception_Testcases[i].Native, "[%u] wrong native_fpcw: expected 0x%x, got 0x%x\n", i, g_exception_Testcases[i].Native, native_fpcw);
}
}
START_TEST(fpcontrol)
{
unsigned int native_fpcw, fpcw, fpstatus;
/* Test native start fpcw */
native_fpcw = get_native_fpcw();
ok_hex(native_fpcw, ON_IX86(0) ON_AMD64(0x1f80) ON_ARM(0) );
/* Test start fpcw */
fpcw = _controlfp(0, 0);
ok_hex(fpcw, ON_IX86(0x9001f) ON_AMD64(0x8001f) ON_ARM(0));
/* Test start status */
fpstatus = _statusfp();
ok_hex(fpstatus, 0);
/* Test _fpreset */
fpcw = _controlfp(0, 0xffffffff);
ok_hex(fpcw, 0x80000);
_fpreset();
fpcw = _controlfp(0, 0);
ok_hex(fpcw, ON_IX86(0x9001f) ON_AMD64(0x8001f) ON_ARM(0));
Test_controlfp();
#if defined(_M_IX86) || defined(_M_AMD64)
Test_control87();
#endif
Test_exceptions();
}
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