Camelot: Kernel/f16spec.h File Reference

Function Documentation

BOOL IsMathCoprocInstalled

(

)

Gives a hint to those that need to know things about FPU performance.

Author:: Andy_Pennell (Xara Group Ltd) <camelotdev@xara.com>

Date:: 19/1/95

Returns:: TRUE if the hardware supports a real FPU, FALSE if emulated.
Errors: None.

Definition at line 213 of file f16spec.cpp.

00214 {
00215 #if defined(__WXMSW__)
00216     // the theoretically proper way to detect an FPU is to delve into the reigstry thus:
00217     // NT  entry lives at HKEY_LOCAL_MACHINE\HARDWARE\DESCRIPTION\System\FloatingPointProcessor\0
00218     // W95 entry lives at HKEY_LOCAL_MACHINE\Enum\Root\*PNP0C01\0000NDP (M7 liable to change)
00219     // W32s is only available by thunking to WinFlags() (ug).
00220     // Instead, we use a tiny bit of .asm, as suggested by Mr-Asm himself, Gavin
00221 
00222     WORD RegCR0;
00223     _asm
00224     {
00225         smsw    RegCR0                  // bit 2 of CR0 is the EM bit, set for emulation
00226     }
00227 
00228     return (RegCR0 & 4) ? FALSE : TRUE;
00229 #else
00230     return TRUE;
00231 #endif
00232 }

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1.4.4

f16spec.h File Reference

(r1785/r751)

Functions

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Functions
BOOL	IsMathCoprocInstalled ()
	Gives a hint to those that need to know things about FPU performance.