Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Bedienungsanleitung PDF herunterladen (Seite 90)

7 DETAILS OF INSTRUCTIONS

EPSON

S1C33 FAMILY C33 PE CORE MANUAL

jpr %rb / jpr.d %rb

Function

Unconditional PC relative jump

Standard) pc

← pc + rb

Extension 1) Unusable

Extension 2) Unusable

Code

15 12 11 8 7 4 3 0

0 0 0 0 0 0 1 d 1 1 0 0

r b

0x02C_, 0x03C_

jpr %rb when d bit (bit 8) = 0

jpr.d %rb when d bit (bit 8) = 1

Flag

IE C V Z N

– – – – –

Mode

CLK

jpr Three cycles

jpr.d Two cycles

Description

(1) Standard

jpr %rb

The content of the

rb register is added to the PC, and the program branches to that address.

(2) Delayed branch (d bit = 1)

jpr.d %rb

For the jpr.d instruction, the next instruction becomes a delayed instruction. A delayed

instruction is executed before the program branches. Exceptions are masked in intervals

between the jpr.d instruction and the next instruction, so no interrupts or exceptions occur.

Example

jpr %r0 ; PC ← PC + R0

Caution

When the jpr.d instruction (delayed branch) is used, be careful to ensure that the next instruction

is limited to those that can be used as a delayed instruction. If any other instruction is executed, the

program may operate indeterminately. For the usable instructions, refer to the instruction list in the

Appendix.

1 2 ... 85 86 87 88 89 90 91 92 93 94 95 ... 180 181

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Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Bedienungsanleitung Seite 90