ST20-C1 STMICROELECTRONICS [STMicroelectronics], ST20-C1 Datasheet - Page 128

• Manufacturer Part Number: ST20-C1
• Description: Instruction Set Reference Manual
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

mul
Code: F6
Description: Multiply Areg by Breg, with checking for overflow but no carry.
Definition:
Status Register:
Comments:
See also: add mac
128/205
Areg
if (prod > MostPos)
{
}
else if (prod < MostNeg)
{
}
Breg
Creg
where
Overflow or underflow bit may be set.
Secondary instruction.
section 4.4.
if (Status
if (Status
Status
Status
low_word prod)
Creg
Areg
prod = Areg Breg
– the value of prod is calculated to unlimited precision
underflo w
overflow
overflow
underflo w
set )
set )
set
set
multiply