gbso/ex.py

from gbso.insn import *
from gbso.optimize import optimize
from gbso.program import Program
from gbso.regs import R8, R16

rLCDC = 0xFF40
rIE = 0xFFFF

IEF_VBLANK = 1 << 0

prgm = Program(
    outputs=set([R8.A]),
    insns=[
        LD_RR_NN(R16.HL, rLCDC),
        RES_N_HL(7),
        RES_N_HL(2),
        LD_RR_NN(R16.HL, rIE),
        LD_HL_N(IEF_VBLANK),
    ],
)

prgm_opt = optimize(prgm)
for insn in prgm_opt.insns:
    print(insn.pretty())