OpenEuphoria

Ping Juergen - bit.e functions

• Posted by Pete Lomax <petelomax at blueyonder.co.uk> Sep 02, 2004
• 557 views

I was just looking at bit.e and noticed that there were several
opcodes not supported by asm.e, so I coded some example lines
up and then disassembled them with OllyDebug (although that does
not understand bts or btr). Anyway, I thought this partial listing
may be of interest, no worries if not:

--00402E7A   8B4424 04		MOV EAX,DWORD PTR SS:[ESP+4]
--00402E7E   58 		POP EAX
--00402E7F   8B4C24 08		MOV ECX,DWORD PTR SS:[ESP+8]
--00402E83   59 		POP ECX
--00402E84   0FABC8 		bts eax,ecx
--00402E87   0FB3C8		btr eax,ecx
--00402E8A   0FA3C8 		BT EAX,ECX
--00402E8D   0F92C0 		SETB AL
--00402E90   25 01000000	AND EAX,1
--00402E95   31C0		XOR EAX,EAX
--00402E97   0FBCC1 		BSF EAX,ECX
--00402E9A   0FBDC1 		BSR EAX,ECX
--00402E9D   C2 0800		RETN 8
--00402EA0   C3 		RETN

Regards,
Pete