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Extension Instructions
Description of symbols
Symbols used for description of extension instructions are listed below.
OP :
Instruction operation
Am, An :
Address register (m, n=3 to 0)
Dm, Dn :
Data register (m, n=3 to 0 )
SP :
Stack pointer
imm :
Immediate (used in a general sense)
imm8 :
8-bit immediate
imm16 :
16-bit immediate
imm32 :
32-bit immediate
d8 :
8-bit displacement
d16 :
16-bit displacement
d32 :
32-bit displacement
abs16 :
16-bit absolute
abs32 :
32-bit absolute
MDR :
Multiply-divide register (built into core)
MDRQ :
High-speed multiply register (built into extension arith-
metic unit)
MCRL :
Multiply and accumulate register (built into extension
arithmetic unit)
MCRH :
Multiply and accumulate register (built into extension
arithmetic unit)
MCVF :
Multiply and accumulate flag (built into extension arith-
metic unit)
LIR :
Loop instruction register
LAR :
Loop address register
PSW :
Processor status word
PC :
Program counter
( ) :
Indirect addressing
regs :
Multiple registers specification
0x.... :
Hexadecimal number (number following "0x" represents
hexadecimal number)
Refer to "@ Addressing Modes" for more information on indirect addressing.
..
..
Extension Instruction Specification
Chapter 16
Appendix
XVI - 39
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