Chapter 16
Appendix
Extension Instruction Specification XVI - 61
MACIBU (unsigned byte data multiply and accumulate instruction: immediate to register)
[Instruction format (macro name)]
MACIBU imm, Dn
[Assembler mnemonic]
udfu33 imm8, Dn
[Operation]
This instruction performs multiply and accumulate operation by means of the multiplier and the adder provided in
the extension arithmetic unit.
The instruction multiplies imm 8-bit data (multiplicand) by the content of Dn (unsigned 8-bit integer: multiplier),
adds this product to the 32-bit accumulative sum that is stored in the multiply and accumulate register MCRL and
stores the 32-bit result in the multiply and accumulate register MCRL.
The register outputs a multiply and accumulate overflow detection flag “1” to the register MCVF if the
accumulative sum data overflows beyond 32 bits during addition of the product and the accumulative sum.
[Flag changes]
[Note for programming]
An instruction other than extension instructions that requires 1 or more cycles must be inserted between this
instruction and a next extension instruction.
Flag Change Condition
V-
C-
N-
Z-
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