Effective Address Calculation; Table 2.13 Effective Address Calculation (1) - Renesas H8S/2158 User Manual

Section 2 CPU
2.7.9

Effective Address Calculation

Table 2.13 indicates how effective addresses are calculated in each addressing mode. In normal
mode, the upper 8 bits of the effective address are ignored in order to generate a 16-bit address.

Table 2.13 Effective Address Calculation (1)

Addressing Mode and Instruction Format
Register direct (Rn)
Register indirect (@ERn)
Register indirect with post-increment or
pre-decrement
• Register indirect with post-increment @ERn+
• Register indirect with pre-decrement @-ERn
Rev. 3.00 Jan 25, 2006 page 48 of 872
REJ09B0286-0300
Effective Address Calculation
General register contents
General register contents
Sign extension
General register contents
1, 2, or 4
General register contents
1, 2, or 4
Operand Size
Byte
Word
Longword
Effective Address (EA)
Operand is general register contents.