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use "standard" _control87 _EM* flag names instead of our own names; also #undef (required since system header values aren't what we want)

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This was SVN commit r2965.
This commit is contained in:
janwas 2005-10-19 03:22:13 +00:00
parent b17fbf003d
commit 5213ca6f56
2 changed files with 22 additions and 22 deletions
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3
source/lib/detect.cpp
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@ -162,7 +162,8 @@ void cpu_init()
// to help catch bugs, enable as many floating-point exceptions as
// possible. that means only zero-divide, because the JS engine is
// triggering the rest.
_control87(_MCW_PM|_MCW_IM|_MCW_UM|_MCW_OM|_MCW_DM, _MCW_EM);
// note: passing a flag *disables* that exception.
_control87(_EM_INVALID|_EM_DENORMAL|_EM_OVERFLOW|_EM_UNDERFLOW|_EM_INEXACT, _MCW_EM);
// If possible, hook up capability-sensitive assembler routines
ia32_hook_capabilities();

41
source/lib/sysdep/ia32.h
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@ -41,32 +41,31 @@ extern u64 rdtsc(void);
// these may have been defined by system headers; we redefine them to
// the real IA-32 values for use with ia32_control87.
// Precision Control:
#undef _MCW_PC
#define _MCW_PC 0x0300 // Precision Control
#define _MCW_PC 0x0300
#undef _PC_24
#define _PC_24 0x0000 // 24 bits
#define _PC_24 0x0000
// Exception Mask:
#undef _MCW_EM
#define _MCW_EM 0x003f // Exception Mask
#undef _MCW_PM
#define _MCW_PM BIT(5)
#ifndef _MCW_IM
# define _MCW_IM 0x0001 // Invalid Operation Mask
#endif
#ifndef _MCW_DM
# define _MCW_DM 0x0002 // Denormal Operand Mask
#endif
#ifndef _MCW_OM
# define _MCW_OM 0x0008 // Overflow Mask
#endif
#ifndef _MCW_UM
# define _MCW_UM 0x00010 // Underflow Mask
#endif
#ifndef _MCW_PM
# define _MCW_PM 0x0020 // Precision Mask
#endif
#define _MCW_EM 0x003f
#undef _EM_INVALID
#define _EM_INVALID BIT(0)
#undef _EM_DENORMAL
#define _EM_DENORMAL BIT(1)
#undef _EM_ZERODIVIDE
#define _EM_ZERODIVIDE BIT(2)
#undef _EM_OVERFLOW
#define _EM_OVERFLOW BIT(3)
#undef _EM_UNDERFLOW
#define _EM_UNDERFLOW BIT(4)
#undef _EM_INEXACT
#define _EM_INEXACT BIT(5)
#define _control87 ia32_control87
extern uint ia32_control87(uint new_cw, uint mask); // asm
extern uint ia32_control87(uint new_val, uint mask); // asm
extern void ia32_debug_break(void);