Mercurial > repos > blastem
comparison cpu_dsl.py @ 1701:4fd34fde390c
Added adc instruction to CPU DSL
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Sun, 27 Jan 2019 05:55:08 -0800 |
| parents | e4b4e21a37fa |
| children | 73ac2e59fa3f |
comparison
equal
deleted
inserted
replaced
| 1700:e4b4e21a37fa | 1701:4fd34fde390c |
|---|---|
| 383 if params[0] == 16: | 383 if params[0] == 16: |
| 384 fmt = '\n\t{dst} = {src} & 0x80 ? {src} | 0xFF00 : {src};' | 384 fmt = '\n\t{dst} = {src} & 0x80 ? {src} | 0xFF00 : {src};' |
| 385 else: | 385 else: |
| 386 fmt = '\n\t{dst} = {src} & 0x8000 ? {src} | 0xFFFF0000 : {src};' | 386 fmt = '\n\t{dst} = {src} & 0x8000 ? {src} | 0xFFFF0000 : {src};' |
| 387 return fmt.format(src=params[1], dst=params[2]) | 387 return fmt.format(src=params[1], dst=params[2]) |
| 388 | 388 |
| 389 def _adcCImpl(prog, params, rawParams): | |
| 390 carryFlag = None | |
| 391 for flag in prog.flags.flagCalc: | |
| 392 if prog.flags.flagCalc[flag] == 'carry': | |
| 393 carryFlag = flag | |
| 394 if carryFlag is None: | |
| 395 raise Exception('adc requires a defined carry flag') | |
| 396 base = '\n\t{dst} = {a} + {b} + ('.format(dst = params[2], a = params[0], b = params[1]) | |
| 397 carryStorage = prog.flags.getStorage(carryFlag) | |
| 398 if type(carryStorage) is tuple: | |
| 399 reg,bit = carryStorage | |
| 400 reg = prog.resolveReg(reg, None, (), False) | |
| 401 check = '({reg} & 1 << {bit})'.format(reg=reg, bit=bit) | |
| 402 else: | |
| 403 check = prog.resolveReg(carryStorage, None, (), False) | |
| 404 return base + check + ' ? 1 : 0);' | |
| 405 | |
| 389 _opMap = { | 406 _opMap = { |
| 390 'mov': Op(lambda val: val).cUnaryOperator(''), | 407 'mov': Op(lambda val: val).cUnaryOperator(''), |
| 391 'not': Op(lambda val: ~val).cUnaryOperator('~'), | 408 'not': Op(lambda val: ~val).cUnaryOperator('~'), |
| 392 'lnot': Op(lambda val: 0 if val else 1).cUnaryOperator('!'), | 409 'lnot': Op(lambda val: 0 if val else 1).cUnaryOperator('!'), |
| 393 'neg': Op(lambda val: -val).cUnaryOperator('-'), | 410 'neg': Op(lambda val: -val).cUnaryOperator('-'), |
| 394 'add': Op(lambda a, b: a + b).cBinaryOperator('+'), | 411 'add': Op(lambda a, b: a + b).cBinaryOperator('+'), |
| 412 'adc': Op().addImplementation('c', 2, _adcCImpl), | |
| 395 'sub': Op(lambda a, b: b - a).cBinaryOperator('-'), | 413 'sub': Op(lambda a, b: b - a).cBinaryOperator('-'), |
| 396 'lsl': Op(lambda a, b: a << b).cBinaryOperator('<<'), | 414 'lsl': Op(lambda a, b: a << b).cBinaryOperator('<<'), |
| 397 'lsr': Op(lambda a, b: a >> b).cBinaryOperator('>>'), | 415 'lsr': Op(lambda a, b: a >> b).cBinaryOperator('>>'), |
| 398 'asr': Op(lambda a, b: a >> b).addImplementation('c', 2, _asrCImpl), | 416 'asr': Op(lambda a, b: a >> b).addImplementation('c', 2, _asrCImpl), |
| 399 'and': Op(lambda a, b: a & b).cBinaryOperator('&'), | 417 'and': Op(lambda a, b: a & b).cBinaryOperator('&'), |