.if X > 0

[oex]

.if X > 0

OK I expected this to fail on X=-1.... What is signed equivelant?

I want:

cmp eax, 0
ja ....

But with nice formatted .if if possible

OK I have fixed the bug and might have had this the wrong way round but regardless still looking for .if equiv to jmp code signed/unsigned

[dedndave]

i think it's

Code Select Expand

.if X .ge 0

myself, i just write

Code Select Expand

cmp eax, 0
ja ....
or

Code Select Expand

or eax,eax
ja ....
:bg

[GregL]

Unsigned

Code Select Expand


.IF X > 0


Signed

Code Select Expand


.IF SDWORD PTR X > 0


Signed and Unsigned Operands

Expression operators generate unsigned jumps by default. However, if either side of the operation is signed, the assembler considers the entire operation signed.

You can use the PTR operator to tell the assembler that a particular operand in a register or constant is a signed number, as in these examples:

    .WHILE  SWORD PTR [bx] <= 0
    .IF SWORD PTR mem1 >  0

Without the PTR operator, the assembler would treat the contents of BX as an unsigned value.

You can also specify the size attributes of operands in memory locations with SBYTE, SWORD, and SDWORD, for use with .IF, .WHILE, and .REPEAT.

    .DATA
    mem1    SBYTE   ?
    mem2    WORD    ?
    .CODE
    .IF mem1 > 0
    .WHILE  mem2 < bx
    .WHILE  SWORD PTR ax < count

[oex]

Awesome ty guys, I was using all jumps until recently but .if syntax is a little neater in certain circumstances

[brethren]

What is signed equivelant?

I want:

cmp eax, 0
ja ....

for signed numbers use jg and jl. ja and jb are for unsigned comparison