Print Page - .if .else .elseif .endif

Title: .if .else .elseif .endif
Post by: bomz on February 27, 2013, 03:52:09 PM

		mov ax, KeyBoardBuffer.Flags
		test ax, KEY_MAKE
		.if ZERO?;(ax & KEY_MAKE);CARY?

what constructions possible else?

Title: Re: .if .else .elseif .endif
Post by: hutch-- on February 27, 2013, 04:01:33 PM

.if

.elseif

.else ; only 1, and must be 2nd last

.endif

Title: Re: .if .else .elseif .endif
Post by: bomz on February 27, 2013, 04:51:11 PM

I mean like this ZERO?;(ax & KEY_MAKE);CARY?. I don't know about them only
.if TRUE
.if !eax
.if eax==ebx.....

Title: Re: .if .else .elseif .endif
Post by: jj2007 on February 27, 2013, 05:22:50 PM

invoke GetKeyState, VK_SHIFT
.if ax & 7 ; test ax, 0007, je @F
nop
.elseif Carry?
nop
.elseif Zero?
nop
.elseif !Zero?
nop
.elseif Sign?
nop
.elseif !(Sign? || Zero?) ; combis are better done "by hand"
nop
.endif

Title: Re: .if .else .elseif .endif
Post by: dedndave on February 28, 2013, 12:37:36 AM

ZERO?
CARRY?
OVERFLOW?
SIGN?
PARITY?

Title: Re: .if .else .elseif .endif
Post by: jj2007 on February 28, 2013, 01:06:06 AM

The Masm developers forgot the Above? and Greater? flags, unfortunately...

Title: Re: .if .else .elseif .endif
Post by: dedndave on February 28, 2013, 01:09:35 AM

yes, those would have been nice
but, you can accomplish those using the "normal" conditional expressions

Title: Re: .if .else .elseif .endif
Post by: Magnum on February 28, 2013, 01:10:45 AM

Operator Meaning

== Equal
!= Not equal
> Greater than
>= Greater than or equal to
< Less than
<= Less than or equal to
& Bit test (format: expression & bitnumber)
! Logical NOT
&& Logical AND
|| Logical OR

CARRY? Carry bit set
OVERFLOW? Overflow bit set
PARITY? Parity bit set
SIGN? Sign bit set
ZERO? Zero bit set

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General => The Campus => Topic started by: bomz on February 27, 2013, 03:52:09 PM