Motorola HC12 Refrence Manual page 245

SEX
If r1 bit 7 = 0, then $00 : (r1) ⇒ r2
Operation:
If r1 bit 7 = 1, then $FF : (r1) ⇒ r2
Description: This instruction is an alternate mnemonic for the TFR r1,r2 instruction,
where r1 is an 8-bit register and r2 is a 16-bit register. The result in r2 is
the 16-bit sign extended representation of the original two's complement
number in r1. The content of r1 is unchanged in all cases except that of
SEX A,D (D is A : B).
Condition Codes and Boolean Formulas:
S
–
None affected.
Addressing Modes, Machine Code, and Execution Times:
Source Form
SEX abc,dxys
Notes:
1. Legal coding for eb is summarized in the following table. Columns represent the high-order digit, and rows rep-
resent the low-order digit in hexadecimal (MSB is a don't-care).
CPU12
REFERENCE MANUAL
Sign Extend into 16-bit Register
X H I N Z
– – – – –
Address Mode
INH
B7 eb
0
sex:A ⇒ TMP2 sex:B ⇒ TMP2
3
sex:A ⇒ D sex:B ⇒ D
4
SEX A,D SEX B,D
sex:A ⇒ X sex:B ⇒ X
5
SEX A,X SEX B,X
sex:A ⇒ Y sex:B ⇒ Y
6
SEX A,Y SEX B,Y
sex:A ⇒ SP sex:B ⇒ SP
7
SEX A,SP SEX B,SP
INSTRUCTION GLOSSARY
V C
– –
1
Object Code
1 2
sex:CCR ⇒ TMP2
sex:CCR ⇒ D
SEX CCR,D
sex:CCR ⇒ X
SEX CCR,X
sex:CCR ⇒ Y
SEX CCR,Y
sex:CCR ⇒ SP
SEX CCR,SP
SEX
Cycles Access Detail
1
P
MOTOROLA
6-185