Table 2.4 Arithmetic Operations Instructions (2) - Renesas H8S/2437 Hardware Manual

Table 2.4 Arithmetic Operations Instructions (2)
Instruction Size*
DIVXS B/W
CMP B/W/L
NEG B/W/L
EXTU W/L
EXTS W/L
2
TAS* B
MAC —
CLRMAC —
LDMAC L
STMAC
Notes: 1. Size refers to the operand size.
B: Byte
W: Word
L: Longword
2. Only register ER0, ER1, ER4, or ER5 should be used when using the TAS instruction.
1
Function
Rd ÷ Rs → Rd
Performs signed division on data in two general registers.
Either 16 bits ÷ 8 bits → 8-bit quotient and 8-bit remainder or
32 bits ÷ 16 bits → 16-bit quotient and 16-bit remainder.
Rd – Rs, Rd – #IMM
Compares data in a general register with data in another general
register or with immediate data, and sets CCR bits according to the
result.
0 – Rd → Rd
Takes the two's complement (arithmetic complement) of data in a
general register.
Rd (zero extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by padding with zeros on the
left.
Rd (sign extension) → Rd
Extends the lower 8 bits of a 16-bit register to word size, or the lower 16
bits of a 32-bit register to longword size, by extending the sign bit.
@ERd – 0, 1 → (<bit 7> of @ERd)
Tests memory contents, and sets the most significant bit (bit 7) to 1.
(EAs) × (EAd) + MAC → MAC
Performs signed multiplication on memory contents and adds the result
to the multiply-accumulate register. The following operations can be
performed:
16 bits × 16 bits + 32 bits → 32 bits, saturating
16 bits × 16 bits + 42 bits → 42 bits, non-saturating
0 → MAC
Clears the multiply-accumulate register to zero.
Rs → MAC, MAC → Rd
Transfers data between a general register and a multiply-accumulate
register.
Rev. 1.00, 09/03, page 35 of 704