3.5 Instruction Set
3.5.1 Overview
The main features of the CPU instruction set are:
• A general-register architecture.
• Orthogonality. Addressing modes and data sizes can be specified independently in each instruction.
• 1.5 addressing modes (supporting register-register and register-memory operations)
• Affinity for high-level languages, particularly C, with short formats for frequently-used
instructions and addressing modes.
• Standard mnemonics, common throughout the H Series.
The CPU instruction set includes 63 types of instructions, listed by function in table 3-9.
Table 3-9 Instruction Classification
* Bcc is a conditional branch instruction in which cc represents a condition code.
Tables 3-10 to 3-16 give a concise summary of the instructions in each functional category. The
MOV, ADD, and CMP instructions have special short formats, which are listed in table 3-17. For
detailed descriptions of the instructions, refer to the H8/500 Series Programming Manual.
The notation used in tables 3-10 to 3-17 is defined below.
Function Instructions Types
Data transfer MOV, LDM, STM, XCH, SWAP, MOVTPE, MOVFPE 7
Arithmetic operations ADD, SUB, ADDS, SUBS, ADDX, SUBX, DADD, DSUB, 17
MULXU, DIVXU, CMP, EXTS, EXTU, TST, NEG, CLR,
TAS
Logic operations AND, OR, XOR, NOT 4
Shift SHAL, SHAR, SHLL, SHLR, ROTL, ROTR, ROTXL, 8
ROTXR
Bit manipulation BSET, BCLR, BTST, BNOT 4
Branch Bcc*, JMP, PJMP, BSR, JSR, PJSR, RTS, PRTD, 11
PRTS, RTD, SCB (/F, /NE, /EQ)
System control TRAPA, TRAP/VS, RTE, SLEEP, LDC, STC, ANDC, 12
ORC, XORC, NOP, LINK, UNLK
Total 63
50
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