Writing ARM and Thumb Assembly Language
ARM DUI 0068B Copyright © 2000, 2001 ARM Limited. All r ights reserved. 2-21
2.5.2 Execution conditionsThe relation of condition code suffixes to the N
, Z
, C
and V
flags is shown in Table 2-1.Examples ADD r0, r1, r2 ; r0 = r1 + r2, don't update flags
ADDS r0, r1, r2 ; r0 = r1 + r2, and update flags
ADDCSS r0, r1, r2 ; If C flag set then r0 = r1 + r2, and update flags
CMP r0, r1 ; update flags based on r0-r1.
Table2-1 Condition code suffixes
Suffix Flags Meaning
EQ Z
set Equal
NE Z
clear Not equal
CS/HS C
set Higher or same (unsigned >= )
CC/LO C
clear Lower (unsigned < )
MI N
set Negative
PL N
clear Positive or zero
VS V
set Overflow
VC V
clear No overflow
HI C
set and
Z
clear Higher (unsigned > )
LS C
clear or
Z
set Lower or same (uns igned <= )
GE N
and
V
the same Signed >=
LT N
and
V
differ Signed <
GT Z
clear,
N
and
V
the same Signed >
LE Z
set,
N
and
V
differ Signed <=
AL
Any Always. T his suffix is normally omitted.