EQU inside if...else...end

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AL-CHEMIST

Joined: 16 Nov 2009
Posts: 3
Location: Russia

AL-CHEMIST 07 May 2023, 00:36

Code:

something equ 1
if something eq 1
else
end if
xdi
; xdi EQ xdi
; OK

Code:

something equ 1
if something eq 1
 xdi equ rdi
else
end if
xdi
; xdi EQ rdi
; OK

Code:

something equ 1
if something eq 1
 xdi equ rdi
else
 xdi equ edi
end if
xdi
; xdi EQ edi
; ??? xdi NOT EQ rdi

Code:

something equ 1
if something eq 1
else
 xdi equ edi
end if
xdi
; xdi EQ edi
; ??? xdi NOT EQ xdi

Why so?

07 May 2023, 00:36

macomics

Joined: 26 Jan 2021
Posts: 1143
Location: Russia

macomics 07 May 2023, 07:00

equ - preprocessor
if .. else .. end if - assembler
To control conditional assignment of values by equ, you need to use match instead of if .. else .. end if.

07 May 2023, 07:00

Roman

Joined: 21 Apr 2012
Posts: 1933

Roman 07 May 2023, 10:23

Quote:

if .. else .. end if - assembler

How about if in match ?

Code:

match x , something {
if x = 1
end if
)

07 May 2023, 10:23

macomics

Joined: 26 Jan 2021
Posts: 1143
Location: Russia

macomics 07 May 2023, 10:43

Roman wrote:

How about if in match ?

Code:

define something 1
define some_else 2
match x , something {
if x = 1
define a 5
end if
display `x, 13, 10
match u, a \{ display \`u, 13, 10 \}
}
match x , some_else {
if x = 1
define b 4
end if
display `x, 13, 10
match u, b \{ display \`u, 13, 10 \}
}

-preprocessor>

Code:

; define something 1
; define some_else 2
; match x, something {
if 1 = 1
; define a 5
end if
display '1', 13, 10
; match u, a \{
display '5', 13, 10
; \}
;}
; match x, some_else {
if 2 = 1
; define b 4
end if
display '2', 13, 10
; match u, b \{
display '4', 13, 10
; \}
;}

-assembler>

Code:

if 1 = 1 ; true
end if
display '1', 13, 10 ; show 1
display '5', 13, 10 ; show 5
if 2 = 1 ; false
end if
display '2', 13, 10 ; show 2
display '4', 13, 10 ; show 4

Code:

$ fasm main.asm -m 64
flat assembler  version 1.73.30  (64 kilobytes memory)
1
5
2
4
1 passes, 0 bytes.

07 May 2023, 10:43

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