ST20-C1 STMICROELECTRONICS [STMicroelectronics], ST20-C1 Datasheet - Page 90
ST20-C1
Manufacturer Part Number
ST20-C1
Description
Instruction Set Reference Manual
Manufacturer
STMICROELECTRONICS [STMicroelectronics]
Datasheet
1.ST20-C1.pdf
(205 pages)
- Current page: 90 of 205
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addc
Code: 21 F0
Description: Add Areg and Breg, unsigned, with carry propagation. This instruction
is provided for long arithmetic; address calculations may be performed with add , sub
and adc without affecting the carry flag.
Definition:
Status Register:
Comments:
See also: adc add subc
90/205
if (sum
{
}
else
{
}
Breg
Creg
where
Carry bit is set or cleared.
Secondary instruction.
section 4.4.
Areg
Status
Areg
Status
unsigned
unsigned
2
BitsPerWord
carry
carry
Creg
Areg
sum
– the value of sum is calculated to unlimited precision
Areg
)
unsigned
sum
clear
sum - 2
set
BitsPerWord
Breg
unsigned
+ Status
carry
add with carry
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