Processor Description Languages

266 CHAPTER 10 ADL++: Object-Oriented Specification

The specification of the addressing modes using regular expressions is given here.

In these expressions,the instruction fields,sets of registers,and other sets of values

appear as artifacts:

#- Instruction fields

#

type

.....

s8 signed integer variable 8 bit,

s16 signed integer variable 16 bit,

s32 signed integer variable 32 bit;

set

scaleVals { 1, 2, 4, 8 };

addressing modes

disp32 s32,

base "[" reg32_noESBP "]",

base_index "[" reg32_noEBP [-+] reg32_noESP "]",

base_index_scale "[" reg32_noEBP [-+] reg32_noESP "*" scaleVals "]",

index_scale_disp32 "[" reg32_noESP "*" scaleVals [-+] s32 "]",

base_disp8 "[" reg32_noESP ...