IEMAllThreadedPython.py@ 99208

Last change on this file since 99208 was 98969, checked in by vboxsync, 21 months ago
VMM/IEM: More work on processing MC blocks, mainly related to reworking common functions for binary operations into body macros. bugref:10369
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1	#!/usr/bin/env python
2	# -- coding: utf-8 --
3	# $Id: IEMAllThreadedPython.py 98969 2023-03-15 00:24:47Z vboxsync $
4	# pylint: disable=invalid-name
5
6	"""
7	Annotates and generates threaded functions from IEMAllInstructions*.cpp.h.
8	"""
9
10	from __future__ import print_function;
11
12	__copyright__ = \
13	"""
14	Copyright (C) 2023 Oracle and/or its affiliates.
15
16	This file is part of VirtualBox base platform packages, as
17	available from https://www.virtualbox.org.
18
19	This program is free software; you can redistribute it and/or
20	modify it under the terms of the GNU General Public License
21	as published by the Free Software Foundation, in version 3 of the
22	License.
23
24	This program is distributed in the hope that it will be useful, but
25	WITHOUT ANY WARRANTY; without even the implied warranty of
26	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27	General Public License for more details.
28
29	You should have received a copy of the GNU General Public License
30	along with this program; if not, see <https://www.gnu.org/licenses>.
31
32	SPDX-License-Identifier: GPL-3.0-only
33	"""
34	__version__ = "$Revision: 98969 $"
35
36	# Standard python imports.
37	import copy;
38	import datetime;
39	import os;
40	import sys;
41	import argparse;
42
43	import IEMAllInstructionsPython as iai;
44
45
46	# Python 3 hacks:
47	if sys.version_info[0] >= 3:
48	long = int; # pylint: disable=redefined-builtin,invalid-name
49
50	## Number of generic parameters for the thread functions.
51	g_kcThreadedParams = 3;
52
53	g_kdTypeInfo = {
54	# type name: (cBits, fSigned, C-type )
55	'int8_t': ( 8, True, 'uint8_t', ),
56	'int16_t': ( 16, True, 'int16_t', ),
57	'int32_t': ( 32, True, 'int32_t', ),
58	'int64_t': ( 64, True, 'int64_t', ),
59	'uint4_t': ( 4, False, 'uint8_t', ),
60	'uint8_t': ( 8, False, 'uint8_t', ),
61	'uint16_t': ( 16, False, 'uint16_t', ),
62	'uint32_t': ( 32, False, 'uint32_t', ),
63	'uint64_t': ( 64, False, 'uint64_t', ),
64	'uintptr_t': ( 64, False, 'uintptr_t', ), # ASSUMES 64-bit host pointer size.
65	'bool': ( 1, False, 'bool', ),
66	'IEMMODE': ( 2, False, 'IEMMODE', ),
67	};
68
69	g_kdIemFieldToType = {
70	# Illegal ones:
71	'offInstrNextByte': ( None, ),
72	'cbInstrBuf': ( None, ),
73	'pbInstrBuf': ( None, ),
74	'uInstrBufPc': ( None, ),
75	'cbInstrBufTotal': ( None, ),
76	'offCurInstrStart': ( None, ),
77	'cbOpcode': ( None, ),
78	'offOpcode': ( None, ),
79	'offModRm': ( None, ),
80	# Okay ones.
81	'fPrefixes': ( 'uint32_t', ),
82	'uRexReg': ( 'uint8_t', ),
83	'uRexB': ( 'uint8_t', ),
84	'uRexIndex': ( 'uint8_t', ),
85	'iEffSeg': ( 'uint8_t', ),
86	'enmEffOpSize': ( 'IEMMODE', ),
87	'enmDefAddrMode': ( 'IEMMODE', ),
88	'enmEffAddrMode': ( 'IEMMODE', ),
89	'enmDefOpSize': ( 'IEMMODE', ),
90	'idxPrefix': ( 'uint8_t', ),
91	'uVex3rdReg': ( 'uint8_t', ),
92	'uVexLength': ( 'uint8_t', ),
93	'fEvexStuff': ( 'uint8_t', ),
94	'uFpuOpcode': ( 'uint16_t', ),
95	};
96
97	class ThreadedParamRef(object):
98	"""
99	A parameter reference for a threaded function.
100	"""
101
102	def __init__(self, sOrgRef, sType, oStmt, iParam = None, offParam = 0):
103	self.sOrgRef = sOrgRef; ##< The name / reference in the original code.
104	self.sStdRef = ''.join(sOrgRef.split()); ##< Normalized name to deal with spaces in macro invocations and such.
105	self.sType = sType; ##< The type (typically derived).
106	self.oStmt = oStmt; ##< The statement making the reference.
107	self.iParam = iParam; ##< The parameter containing the references. None if implicit.
108	self.offParam = offParam; ##< The offset in the parameter of the reference.
109
110	self.sNewName = 'x'; ##< The variable name in the threaded function.
111	self.iNewParam = 99; ##< The this is packed into.
112	self.offNewParam = 1024 ##< The bit offset in iNewParam.
113
114
115	class ThreadedFunctionVariation(object):
116	""" Threaded function variation. """
117
118	## @name Variations.
119	## These variations will match translation block selection/distinctions as well.
120	## @note Effective operand size is generally handled in the decoder, at present
121	## we only do variations on addressing and memory accessing.
122	## @{
123	ksVariation_Default = ''; ##< No variations.
124	ksVariation_Addr16 = '_Addr16'; ##< 16-bit addressing mode.
125	ksVariation_Addr32 = '_Addr32'; ##< 32-bit addressing mode.
126	ksVariation_Addr32Flat = '_Addr32Flat'; ##< 32-bit addressing mode with CS, DS, ES and SS flat and 4GB wide.
127	ksVariation_Addr64 = '_Addr64'; ##< 64-bit addressing mode.
128	ksVariation_Addr64_32 = '_Addr6432'; ##< 32-bit addressing in 64-bit mode.
129	kasVariations_EffAddr = (
130	ksVariation_Addr16, ksVariation_Addr32, ksVariation_Addr32Flat, ksVariation_Addr64, ksVariation_Addr64_32
131	);
132	## @}
133
134	def __init__(self, oThreadedFunction, sVariation = ksVariation_Default):
135	self.oParent = oThreadedFunction # type: ThreadedFunction
136	##< ksVariation_Xxxx.
137	self.sVariation = sVariation
138
139	## Threaded function parameter references.
140	self.aoParamRefs = [] # type: list(ThreadedParamRef)
141	## Unique parameter references.
142	self.dParamRefs = {} # type: dict(str,list(ThreadedParamRef))
143	## Minimum number of parameters to the threaded function.
144	self.cMinParams = 0;
145
146	## List/tree of statements for the threaded function.
147	self.aoStmtsForThreadedFunction = [] # type list(McStmt)
148
149	def getIndexName(self):
150	sName = self.oParent.oMcBlock.sFunction;
151	if sName.startswith('iemOp_'):
152	sName = sName[len('iemOp_'):];
153	if self.oParent.oMcBlock.iInFunction == 0:
154	return 'kIemThreadedFunc_%s%s' % ( sName, self.sVariation, );
155	return 'kIemThreadedFunc_%s_%s%s' % ( sName, self.oParent.oMcBlock.iInFunction, self.sVariation, );
156
157	def getFunctionName(self):
158	sName = self.oParent.oMcBlock.sFunction;
159	if sName.startswith('iemOp_'):
160	sName = sName[len('iemOp_'):];
161	if self.oParent.oMcBlock.iInFunction == 0:
162	return 'iemThreadedFunc_%s%s' % ( sName, self.sVariation, );
163	return 'iemThreadedFunc_%s_%s%s' % ( sName, self.oParent.oMcBlock.iInFunction, self.sVariation, );
164
165	#
166	# Analysis and code morphing.
167	#
168
169	def raiseProblem(self, sMessage):
170	""" Raises a problem. """
171	self.oParent.raiseProblem(sMessage);
172
173	def analyzeReferenceToType(self, sRef):
174	"""
175	Translates a variable or structure reference to a type.
176	Returns type name.
177	Raises exception if unable to figure it out.
178	"""
179	ch0 = sRef[0];
180	if ch0 == 'u':
181	if sRef.startswith('u32'):
182	return 'uint32_t';
183	if sRef.startswith('u8') or sRef == 'uReg':
184	return 'uint8_t';
185	if sRef.startswith('u64'):
186	return 'uint64_t';
187	if sRef.startswith('u16'):
188	return 'uint16_t';
189	elif ch0 == 'b':
190	return 'uint8_t';
191	elif ch0 == 'f':
192	return 'bool';
193	elif ch0 == 'i':
194	if sRef.startswith('i8'):
195	return 'int8_t';
196	if sRef.startswith('i16'):
197	return 'int32_t';
198	if sRef.startswith('i32'):
199	return 'int32_t';
200	if sRef.startswith('i64'):
201	return 'int64_t';
202	if sRef in ('iReg', 'iGReg', 'iSegReg', 'iSrcReg', 'iDstReg'):
203	return 'uint8_t';
204	elif ch0 == 'p':
205	if sRef.find('-') < 0:
206	return 'uintptr_t';
207	if sRef.startswith('pVCpu->iem.s.'):
208	sField = sRef[len('pVCpu->iem.s.') : ];
209	if sField in g_kdIemFieldToType:
210	if g_kdIemFieldToType[sField][0]:
211	return g_kdIemFieldToType[sField][0];
212	self.raiseProblem('Reference out-of-bounds decoder field: %s' % (sRef,));
213	elif ch0 == 'G' and sRef.startswith('GCPtr'):
214	return 'uint64_t';
215	elif ch0 == 'e':
216	if sRef == 'enmEffOpSize':
217	return 'IEMMODE';
218	elif sRef == 'cShift': ## @todo risky
219	return 'uint8_t';
220
221	self.raiseProblem('Unknown reference: %s' % (sRef,));
222	return None; # Shut up pylint 2.16.2.
223
224	def analyzeMorphStmtForThreaded(self, aoStmts, iParamRef = 0):
225	"""
226	Transforms (copy) the statements into those for the threaded function.
227
228	Returns list/tree of statements (aoStmts is not modified) and the new
229	iParamRef value.
230	"""
231	#
232	# We'll be traversing aoParamRefs in parallel to the statements, so we
233	# must match the traversal in analyzeFindThreadedParamRefs exactly.
234	#
235	#print('McBlock at %s:%s' % (os.path.split(self.oMcBlock.sSrcFile)[1], self.oMcBlock.iBeginLine,));
236	aoThreadedStmts = [];
237	for oStmt in aoStmts:
238	# Skip C++ statements that is purely related to decoding.
239	if not oStmt.isCppStmt() or not oStmt.fDecode:
240	# Copy the statement. Make a deep copy to make sure we've got our own
241	# copies of all instance variables, even if a bit overkill at the moment.
242	oNewStmt = copy.deepcopy(oStmt);
243	aoThreadedStmts.append(oNewStmt);
244	#print('oNewStmt %s %s' % (oNewStmt.sName, len(oNewStmt.asParams),));
245
246	# If the statement has parameter references, process the relevant parameters.
247	# We grab the references relevant to this statement and apply them in reserve order.
248	if iParamRef < len(self.aoParamRefs) and self.aoParamRefs[iParamRef].oStmt == oStmt:
249	iParamRefFirst = iParamRef;
250	while True:
251	iParamRef += 1;
252	if iParamRef >= len(self.aoParamRefs) or self.aoParamRefs[iParamRef].oStmt != oStmt:
253	break;
254
255	#print('iParamRefFirst=%s iParamRef=%s' % (iParamRefFirst, iParamRef));
256	for iCurRef in range(iParamRef - 1, iParamRefFirst - 1, -1):
257	oCurRef = self.aoParamRefs[iCurRef];
258	if oCurRef.iParam is not None:
259	assert oCurRef.oStmt == oStmt;
260	#print('iCurRef=%s iParam=%s sOrgRef=%s' % (iCurRef, oCurRef.iParam, oCurRef.sOrgRef));
261	sSrcParam = oNewStmt.asParams[oCurRef.iParam];
262	assert sSrcParam[oCurRef.offParam : oCurRef.offParam + len(oCurRef.sOrgRef)] == oCurRef.sOrgRef, \
263	'offParam=%s sOrgRef=%s sSrcParam=%s<eos>' % (oCurRef.offParam, oCurRef.sOrgRef, sSrcParam);
264	oNewStmt.asParams[oCurRef.iParam] = sSrcParam[0 : oCurRef.offParam] \
265	+ oCurRef.sNewName \
266	+ sSrcParam[oCurRef.offParam + len(oCurRef.sOrgRef) : ];
267
268	# Morph IEM_MC_CALC_RM_EFF_ADDR into IEM_MC_CALC_RM_EFF_ADDR_THREADED ...
269	if oNewStmt.sName == 'IEM_MC_CALC_RM_EFF_ADDR':
270	assert self.sVariation != self.ksVariation_Default;
271	oNewStmt.sName = 'IEM_MC_CALC_RM_EFF_ADDR_THREADED' + self.sVariation.upper();
272	assert len(oNewStmt.asParams) == 3;
273	if self.sVariation == self.ksVariation_Addr16:
274	oNewStmt.asParams = [
275	oNewStmt.asParams[0], oNewStmt.asParams[1], self.dParamRefs['u16Disp'][0].sNewName,
276	];
277	elif self.sVariation in (self.ksVariation_Addr32, self.ksVariation_Addr32Flat):
278	oNewStmt.asParams = [
279	oNewStmt.asParams[0], oNewStmt.asParams[1], self.dParamRefs['bSib'][0].sNewName,
280	self.dParamRefs['u32Disp'][0].sNewName,
281	];
282	else:
283	oNewStmt.asParams = [
284	oNewStmt.asParams[0], self.dParamRefs['bRmEx'][0].sNewName, self.dParamRefs['bSib'][0].sNewName,
285	self.dParamRefs['u32Disp'][0].sNewName, self.dParamRefs['cbInstr'][0].sNewName,
286	];
287	# ... and IEM_MC_ADVANCE_RIP_AND_FINISH into *_THREADED ...
288	elif oNewStmt.sName in ('IEM_MC_ADVANCE_RIP_AND_FINISH', 'IEM_MC_REL_JMP_S8_AND_FINISH',
289	'IEM_MC_REL_JMP_S16_AND_FINISH', 'IEM_MC_REL_JMP_S32_AND_FINISH'):
290	oNewStmt.sName += '_THREADED';
291	oNewStmt.asParams.append(self.dParamRefs['cbInstr'][0].sNewName);
292	# ... and IEM_MC_CALL_CIMPL_[0-5] into *_THREADED ...
293	elif oNewStmt.sName.startswith('IEM_MC_CALL_CIMPL_'):
294	oNewStmt.sName += '_THREADED';
295	oNewStmt.asParams.insert(0, self.dParamRefs['cbInstr'][0].sNewName);
296
297	# Process branches of conditionals recursively.
298	if isinstance(oStmt, iai.McStmtCond):
299	(oNewStmt.aoIfBranch, iParamRef) = self.analyzeMorphStmtForThreaded(oStmt.aoIfBranch, iParamRef);
300	if oStmt.aoElseBranch:
301	(oNewStmt.aoElseBranch, iParamRef) = self.analyzeMorphStmtForThreaded(oStmt.aoElseBranch, iParamRef);
302
303	return (aoThreadedStmts, iParamRef);
304
305	def analyzeConsolidateThreadedParamRefs(self):
306	"""
307	Consolidate threaded function parameter references into a dictionary
308	with lists of the references to each variable/field.
309	"""
310	# Gather unique parameters.
311	self.dParamRefs = {};
312	for oRef in self.aoParamRefs:
313	if oRef.sStdRef not in self.dParamRefs:
314	self.dParamRefs[oRef.sStdRef] = [oRef,];
315	else:
316	self.dParamRefs[oRef.sStdRef].append(oRef);
317
318	# Generate names for them for use in the threaded function.
319	dParamNames = {};
320	for sName, aoRefs in self.dParamRefs.items():
321	# Morph the reference expression into a name.
322	if sName.startswith('IEM_GET_MODRM_REG'): sName = 'bModRmRegP';
323	elif sName.startswith('IEM_GET_MODRM_RM'): sName = 'bModRmRmP';
324	elif sName.startswith('IEM_GET_MODRM_REG_8'): sName = 'bModRmReg8P';
325	elif sName.startswith('IEM_GET_MODRM_RM_8'): sName = 'bModRmRm8P';
326	elif sName.startswith('IEM_GET_EFFECTIVE_VVVV'): sName = 'bEffVvvvP';
327	elif sName.find('.') >= 0 or sName.find('->') >= 0:
328	sName = sName[max(sName.rfind('.'), sName.rfind('>')) + 1 : ] + 'P';
329	else:
330	sName += 'P';
331
332	# Ensure it's unique.
333	if sName in dParamNames:
334	for i in range(10):
335	if sName + str(i) not in dParamNames:
336	sName += str(i);
337	break;
338	dParamNames[sName] = True;
339
340	# Update all the references.
341	for oRef in aoRefs:
342	oRef.sNewName = sName;
343
344	# Organize them by size too for the purpose of optimize them.
345	dBySize = {} # type: dict(str,str)
346	for sStdRef, aoRefs in self.dParamRefs.items():
347	if aoRefs[0].sType[0] != 'P':
348	cBits = g_kdTypeInfo[aoRefs[0].sType][0];
349	assert(cBits <= 64);
350	else:
351	cBits = 64;
352
353	if cBits not in dBySize:
354	dBySize[cBits] = [sStdRef,]
355	else:
356	dBySize[cBits].append(sStdRef);
357
358	# Pack the parameters as best as we can, starting with the largest ones
359	# and ASSUMING a 64-bit parameter size.
360	self.cMinParams = 0;
361	offNewParam = 0;
362	for cBits in sorted(dBySize.keys(), reverse = True):
363	for sStdRef in dBySize[cBits]:
364	if offNewParam < 64:
365	offNewParam += cBits;
366	else:
367	self.cMinParams += 1;
368	offNewParam = cBits;
369	assert(offNewParam <= 64);
370
371	for oRef in self.dParamRefs[sStdRef]:
372	oRef.iNewParam = self.cMinParams;
373	oRef.offNewParam = offNewParam - cBits;
374
375	if offNewParam > 0:
376	self.cMinParams += 1;
377
378	# Currently there are a few that requires 4 parameters, list these so we can figure out why:
379	if self.cMinParams >= 4:
380	print('debug: cMinParams=%s cRawParams=%s - %s:%d'
381	% (self.cMinParams, len(self.dParamRefs), self.oParent.oMcBlock.sSrcFile, self.oParent.oMcBlock.iBeginLine,));
382
383	return True;
384
385	ksHexDigits = '0123456789abcdefABCDEF';
386
387	def analyzeFindThreadedParamRefs(self, aoStmts):
388	"""
389	Scans the statements for things that have to passed on to the threaded
390	function (populates self.aoParamRefs).
391	"""
392	for oStmt in aoStmts:
393	# Some statements we can skip alltogether.
394	if isinstance(oStmt, iai.McCppPreProc):
395	continue;
396	if oStmt.isCppStmt() and oStmt.fDecode:
397	continue;
398
399	if isinstance(oStmt, iai.McStmtVar):
400	if oStmt.sConstValue is None:
401	continue;
402	aiSkipParams = { 0: True, 1: True, 3: True };
403	else:
404	aiSkipParams = {};
405
406	# Several statements have implicit parameters.
407	if oStmt.sName in ('IEM_MC_ADVANCE_RIP_AND_FINISH', 'IEM_MC_REL_JMP_S8_AND_FINISH', 'IEM_MC_REL_JMP_S16_AND_FINISH',
408	'IEM_MC_REL_JMP_S32_AND_FINISH', 'IEM_MC_CALL_CIMPL_0', 'IEM_MC_CALL_CIMPL_1',
409	'IEM_MC_CALL_CIMPL_2', 'IEM_MC_CALL_CIMPL_3', 'IEM_MC_CALL_CIMPL_4', 'IEM_MC_CALL_CIMPL_5', ):
410	self.aoParamRefs.append(ThreadedParamRef('cbInstr', 'uint4_t', oStmt));
411
412	if oStmt.sName == 'IEM_MC_CALC_RM_EFF_ADDR':
413	## @todo figure out how to do this in the input part...
414	if self.sVariation == self.ksVariation_Addr16:
415	self.aoParamRefs.append(ThreadedParamRef('bRm', 'uint8_t', oStmt));
416	self.aoParamRefs.append(ThreadedParamRef('u16Disp', 'uint16_t', oStmt));
417	elif self.sVariation in (self.ksVariation_Addr32, self.ksVariation_Addr32Flat):
418	self.aoParamRefs.append(ThreadedParamRef('bRm', 'uint8_t', oStmt));
419	self.aoParamRefs.append(ThreadedParamRef('bSib', 'uint8_t', oStmt));
420	self.aoParamRefs.append(ThreadedParamRef('u32Disp', 'uint32_t', oStmt));
421	else:
422	assert self.sVariation in (self.ksVariation_Addr64, self.ksVariation_Addr64_32);
423	self.aoParamRefs.append(ThreadedParamRef('bRmEx', 'uint8_t', oStmt));
424	self.aoParamRefs.append(ThreadedParamRef('bSib', 'uint8_t', oStmt));
425	self.aoParamRefs.append(ThreadedParamRef('u32Disp', 'uint32_t', oStmt));
426	self.aoParamRefs.append(ThreadedParamRef('cbInstr', 'uint4_t', oStmt));
427
428	# Inspect the target of calls to see if we need to pass down a
429	# function pointer or function table pointer for it to work.
430	if isinstance(oStmt, iai.McStmtCall):
431	if oStmt.sFn[0] == 'p':
432	self.aoParamRefs.append(ThreadedParamRef(oStmt.sFn, 'uintptr_t', oStmt, oStmt.idxFn));
433	elif ( oStmt.sFn[0] != 'i'
434	and not oStmt.sFn.startswith('IEMTARGETCPU_EFL_BEHAVIOR_SELECT')
435	and not oStmt.sFn.startswith('IEM_SELECT_HOST_OR_FALLBACK') ):
436	self.raiseProblem('Bogus function name in %s: %s' % (oStmt.sName, oStmt.sFn,));
437	aiSkipParams[oStmt.idxFn] = True;
438
439	# Check all the parameters for bogus references.
440	for iParam, sParam in enumerate(oStmt.asParams):
441	if iParam not in aiSkipParams and sParam not in self.oParent.dVariables:
442	# The parameter may contain a C expression, so we have to try
443	# extract the relevant bits, i.e. variables and fields while
444	# ignoring operators and parentheses.
445	offParam = 0;
446	while offParam < len(sParam):
447	# Is it the start of an C identifier? If so, find the end, but don't stop on field separators (->, .).
448	ch = sParam[offParam];
449	if ch.isalpha() or ch == '_':
450	offStart = offParam;
451	offParam += 1;
452	while offParam < len(sParam):
453	ch = sParam[offParam];
454	if not ch.isalnum() and ch != '_' and ch != '.':
455	if ch != '-' or sParam[offParam + 1] != '>':
456	# Special hack for the 'CTX_SUFF(pVM)' bit in pVCpu->CTX_SUFF(pVM)->xxxx:
457	if ( ch == '('
458	and sParam[offStart : offParam + len('(pVM)->')] == 'pVCpu->CTX_SUFF(pVM)->'):
459	offParam += len('(pVM)->') - 1;
460	else:
461	break;
462	offParam += 1;
463	offParam += 1;
464	sRef = sParam[offStart : offParam];
465
466	# For register references, we pass the full register indexes instead as macros
467	# like IEM_GET_MODRM_REG implicitly references pVCpu->iem.s.uRexReg and the
468	# threaded function will be more efficient if we just pass the register index
469	# as a 4-bit param.
470	if ( sRef.startswith('IEM_GET_MODRM')
471	or sRef.startswith('IEM_GET_EFFECTIVE_VVVV') ):
472	offParam = iai.McBlock.skipSpacesAt(sParam, offParam, len(sParam));
473	if sParam[offParam] != '(':
474	self.raiseProblem('Expected "(" following %s in "%s"' % (sRef, oStmt.renderCode(),));
475	(asMacroParams, offCloseParam) = iai.McBlock.extractParams(sParam, offParam);
476	if asMacroParams is None:
477	self.raiseProblem('Unable to find ")" for %s in "%s"' % (sRef, oStmt.renderCode(),));
478	offParam = offCloseParam + 1;
479	self.aoParamRefs.append(ThreadedParamRef(sParam[offStart : offParam], 'uint8_t',
480	oStmt, iParam, offStart));
481
482	# We can skip known variables.
483	elif sRef in self.oParent.dVariables:
484	pass;
485
486	# Skip certain macro invocations.
487	elif sRef in ('IEM_GET_HOST_CPU_FEATURES',
488	'IEM_GET_GUEST_CPU_FEATURES',
489	'IEM_IS_GUEST_CPU_AMD'):
490	offParam = iai.McBlock.skipSpacesAt(sParam, offParam, len(sParam));
491	if sParam[offParam] != '(':
492	self.raiseProblem('Expected "(" following %s in "%s"' % (sRef, oStmt.renderCode(),));
493	(asMacroParams, offCloseParam) = iai.McBlock.extractParams(sParam, offParam);
494	if asMacroParams is None:
495	self.raiseProblem('Unable to find ")" for %s in "%s"' % (sRef, oStmt.renderCode(),));
496	offParam = offCloseParam + 1;
497	while offParam < len(sParam) and (sParam[offParam].isalnum() or sParam[offParam] in '_.'):
498	offParam += 1;
499
500	# Skip constants, globals, types (casts), sizeof and macros.
501	elif ( sRef.startswith('IEM_OP_PRF_')
502	or sRef.startswith('IEM_ACCESS_')
503	or sRef.startswith('IEMINT_')
504	or sRef.startswith('X86_GREG_')
505	or sRef.startswith('X86_SREG_')
506	or sRef.startswith('X86_EFL_')
507	or sRef.startswith('X86_FSW_')
508	or sRef.startswith('X86_FCW_')
509	or sRef.startswith('X86_XCPT_')
510	or sRef.startswith('IEMMODE_')
511	or sRef.startswith('g_')
512	or sRef in ( 'int8_t', 'int16_t', 'int32_t',
513	'INT8_C', 'INT16_C', 'INT32_C', 'INT64_C',
514	'UINT8_C', 'UINT16_C', 'UINT32_C', 'UINT64_C',
515	'UINT8_MAX', 'UINT16_MAX', 'UINT32_MAX', 'UINT64_MAX',
516	'INT8_MAX', 'INT16_MAX', 'INT32_MAX', 'INT64_MAX',
517	'INT8_MIN', 'INT16_MIN', 'INT32_MIN', 'INT64_MIN',
518	'sizeof', 'NOREF', 'RT_NOREF', 'IEMMODE_64BIT',
519	'NIL_RTGCPTR' ) ):
520	pass;
521
522	# Skip certain macro invocations.
523	# Any variable (non-field) and decoder fields in IEMCPU will need to be parameterized.
524	elif ( ( '.' not in sRef
525	and '-' not in sRef
526	and sRef not in ('pVCpu', ) )
527	or iai.McBlock.koReIemDecoderVars.search(sRef) is not None):
528	self.aoParamRefs.append(ThreadedParamRef(sRef, self.analyzeReferenceToType(sRef),
529	oStmt, iParam, offStart));
530	# Number.
531	elif ch.isdigit():
532	if ( ch == '0'
533	and offParam + 2 <= len(sParam)
534	and sParam[offParam + 1] in 'xX'
535	and sParam[offParam + 2] in self.ksHexDigits ):
536	offParam += 2;
537	while offParam < len(sParam) and sParam[offParam] in self.ksHexDigits:
538	offParam += 1;
539	else:
540	while offParam < len(sParam) and sParam[offParam].isdigit():
541	offParam += 1;
542	# Whatever else.
543	else:
544	offParam += 1;
545
546	# Traverse the branches of conditionals.
547	if isinstance(oStmt, iai.McStmtCond):
548	self.analyzeFindThreadedParamRefs(oStmt.aoIfBranch);
549	self.analyzeFindThreadedParamRefs(oStmt.aoElseBranch);
550	return True;
551
552	def analyzeVariation(self, aoStmts):
553	"""
554	2nd part of the analysis, done on each variation.
555
556	The variations may differ in parameter requirements and will end up with
557	slightly different MC sequences. Thus this is done on each individually.
558
559	Returns dummy True - raises exception on trouble.
560	"""
561	# Now scan the code for variables and field references that needs to
562	# be passed to the threaded function because they are related to the
563	# instruction decoding.
564	self.analyzeFindThreadedParamRefs(aoStmts);
565	self.analyzeConsolidateThreadedParamRefs();
566
567	# Morph the statement stream for the block into what we'll be using in the threaded function.
568	(self.aoStmtsForThreadedFunction, iParamRef) = self.analyzeMorphStmtForThreaded(aoStmts);
569	if iParamRef != len(self.aoParamRefs):
570	raise Exception('iParamRef=%s, expected %s!' % (iParamRef, len(self.aoParamRefs),));
571
572	return True;
573
574
575	class ThreadedFunction(object):
576	"""
577	A threaded function.
578	"""
579
580	def __init__(self, oMcBlock):
581	self.oMcBlock = oMcBlock # type: IEMAllInstructionsPython.McBlock
582	## Variations for this block. There is at least one.
583	self.aoVariations = [] # type: list(ThreadedFunctionVariation)
584	## Dictionary of local variables (IEM_MC_LOCAL[_CONST]) and call arguments (IEM_MC_ARG*).
585	self.dVariables = {} # type: dict(str,McStmtVar)
586
587	@staticmethod
588	def dummyInstance():
589	""" Gets a dummy instance. """
590	return ThreadedFunction(iai.McBlock('null', 999999999, 999999999, 'nil', 999999999));
591
592	def raiseProblem(self, sMessage):
593	""" Raises a problem. """
594	raise Exception('%s:%s: error: %s' % (self.oMcBlock.sSrcFile, self.oMcBlock.iBeginLine, sMessage, ));
595
596	def analyzeFindVariablesAndCallArgs(self, aoStmts):
597	""" Scans the statements for MC variables and call arguments. """
598	for oStmt in aoStmts:
599	if isinstance(oStmt, iai.McStmtVar):
600	if oStmt.sVarName in self.dVariables:
601	raise Exception('Variable %s is defined more than once!' % (oStmt.sVarName,));
602	self.dVariables[oStmt.sVarName] = oStmt.sVarName;
603
604	# There shouldn't be any variables or arguments declared inside if/
605	# else blocks, but scan them too to be on the safe side.
606	if isinstance(oStmt, iai.McStmtCond):
607	cBefore = len(self.dVariables);
608	self.analyzeFindVariablesAndCallArgs(oStmt.aoIfBranch);
609	self.analyzeFindVariablesAndCallArgs(oStmt.aoElseBranch);
610	if len(self.dVariables) != cBefore:
611	raise Exception('Variables/arguments defined in conditional branches!');
612	return True;
613
614	def analyze(self):
615	"""
616	Analyzes the code, identifying the number of parameters it requires and such.
617
618	Returns dummy True - raises exception on trouble.
619	"""
620
621	# Decode the block into a list/tree of McStmt objects.
622	aoStmts = self.oMcBlock.decode();
623
624	# Scan the statements for local variables and call arguments (self.dVariables).
625	self.analyzeFindVariablesAndCallArgs(aoStmts);
626
627	# Create variations if needed.
628	if iai.McStmt.findStmtByNames(aoStmts, {'IEM_MC_CALC_RM_EFF_ADDR' : True,}):
629	self.aoVariations = [ThreadedFunctionVariation(self, sVar)
630	for sVar in ThreadedFunctionVariation.kasVariations_EffAddr];
631	else:
632	self.aoVariations = [ThreadedFunctionVariation(self),];
633
634	# Continue the analysis on each variation.
635	for oVariation in self.aoVariations:
636	oVariation.analyzeVariation(aoStmts);
637
638	return True;
639
640	def generateInputCode(self):
641	"""
642	Modifies the input code.
643	"""
644	assert len(self.oMcBlock.asLines) > 2, "asLines=%s" % (self.oMcBlock.asLines,);
645	cchIndent = (self.oMcBlock.cchIndent + 3) // 4 * 4;
646	return iai.McStmt.renderCodeForList(self.oMcBlock.aoStmts, cchIndent = cchIndent).replace('\n', ' /* gen */\n', 1);
647
648
649	class IEMThreadedGenerator(object):
650	"""
651	The threaded code generator & annotator.
652	"""
653
654	def __init__(self):
655	self.aoThreadedFuncs = [] # type: list(ThreadedFunction)
656	self.oOptions = None # type: argparse.Namespace
657	self.aoParsers = [] # type: list(IEMAllInstructionsPython.SimpleParser)
658
659	#
660	# Processing.
661	#
662
663	def processInputFiles(self):
664	"""
665	Process the input files.
666	"""
667
668	# Parse the files.
669	self.aoParsers = iai.parseFiles(self.oOptions.asInFiles);
670
671	# Create threaded functions for the MC blocks.
672	self.aoThreadedFuncs = [ThreadedFunction(oMcBlock) for oMcBlock in iai.g_aoMcBlocks];
673
674	# Analyze the threaded functions.
675	dRawParamCounts = {};
676	dMinParamCounts = {};
677	for oThreadedFunction in self.aoThreadedFuncs:
678	oThreadedFunction.analyze();
679	for oVariation in oThreadedFunction.aoVariations:
680	dRawParamCounts[len(oVariation.dParamRefs)] = dRawParamCounts.get(len(oVariation.dParamRefs), 0) + 1;
681	dMinParamCounts[oVariation.cMinParams] = dMinParamCounts.get(oVariation.cMinParams, 0) + 1;
682	print('debug: param count distribution, raw and optimized:', file = sys.stderr);
683	for cCount in sorted({cBits: True for cBits in list(dRawParamCounts.keys()) + list(dMinParamCounts.keys())}.keys()):
684	print('debug: %s params: %4s raw, %4s min'
685	% (cCount, dRawParamCounts.get(cCount, 0), dMinParamCounts.get(cCount, 0)),
686	file = sys.stderr);
687
688	return True;
689
690	#
691	# Output
692	#
693
694	def generateLicenseHeader(self):
695	"""
696	Returns the lines for a license header.
697	"""
698	return [
699	'/*',
700	' * Autogenerated by $Id: IEMAllThreadedPython.py 98969 2023-03-15 00:24:47Z vboxsync $ ',
701	' * Do not edit!',
702	' */',
703	'',
704	'/*',
705	' * Copyright (C) 2023-' + str(datetime.date.today().year) + ' Oracle and/or its affiliates.',
706	' *',
707	' * This file is part of VirtualBox base platform packages, as',
708	' * available from https://www.virtualbox.org.',
709	' *',
710	' * This program is free software; you can redistribute it and/or',
711	' * modify it under the terms of the GNU General Public License',
712	' * as published by the Free Software Foundation, in version 3 of the',
713	' * License.',
714	' *',
715	' * This program is distributed in the hope that it will be useful, but',
716	' * WITHOUT ANY WARRANTY; without even the implied warranty of',
717	' * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU',
718	' * General Public License for more details.',
719	' *',
720	' * You should have received a copy of the GNU General Public License',
721	' * along with this program; if not, see <https://www.gnu.org/licenses>.',
722	' *',
723	' * The contents of this file may alternatively be used under the terms',
724	' * of the Common Development and Distribution License Version 1.0',
725	' * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included',
726	' * in the VirtualBox distribution, in which case the provisions of the',
727	' * CDDL are applicable instead of those of the GPL.',
728	' *',
729	' * You may elect to license modified versions of this file under the',
730	' * terms and conditions of either the GPL or the CDDL or both.',
731	' *',
732	' * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0',
733	' */',
734	'',
735	'',
736	'',
737	];
738
739
740	def generateThreadedFunctionsHeader(self, oOut):
741	"""
742	Generates the threaded functions header file.
743	Returns success indicator.
744	"""
745
746	asLines = self.generateLicenseHeader();
747
748	# Generate the threaded function table indexes.
749	asLines += [
750	'typedef enum IEMTHREADEDFUNCS',
751	'{',
752	' kIemThreadedFunc_Invalid = 0,',
753	];
754	for oThreadedFunction in self.aoThreadedFuncs:
755	for oVariation in oThreadedFunction.aoVariations:
756	asLines.append(' ' + oVariation.getIndexName() + ',');
757	asLines += [
758	' kIemThreadedFunc_End',
759	'} IEMTHREADEDFUNCS;',
760	'',
761	];
762
763	# Prototype the function table.
764	sFnType = 'typedef IEM_DECL_IMPL_TYPE(VBOXSTRICTRC, FNIEMTHREADEDFUNC, (PVMCPU pVCpu';
765	for iParam in range(g_kcThreadedParams):
766	sFnType += ', uint64_t uParam' + str(iParam);
767	sFnType += '));'
768
769	asLines += [
770	sFnType,
771	'typedef FNIEMTHREADEDFUNC *PFNIEMTHREADEDFUNC;',
772	'',
773	'extern const PFNIEMTHREADEDFUNC g_apfnIemThreadedFunctions[kIemThreadedFunc_End];',
774	];
775
776	oOut.write('\n'.join(asLines));
777	return True;
778
779	ksBitsToIntMask = {
780	1: "UINT64_C(0x1)",
781	2: "UINT64_C(0x3)",
782	4: "UINT64_C(0xf)",
783	8: "UINT64_C(0xff)",
784	16: "UINT64_C(0xffff)",
785	32: "UINT64_C(0xffffffff)",
786	};
787	def generateThreadedFunctionsSource(self, oOut):
788	"""
789	Generates the threaded functions source file.
790	Returns success indicator.
791	"""
792
793	asLines = self.generateLicenseHeader();
794	oOut.write('\n'.join(asLines));
795
796	# Prepare the fixed bits.
797	sParamList = '(PVMCPU pVCpu';
798	for iParam in range(g_kcThreadedParams):
799	sParamList += ', uint64_t uParam' + str(iParam);
800	sParamList += '))\n';
801
802	#
803	# Emit the function definitions.
804	#
805	for oThreadedFunction in self.aoThreadedFuncs:
806	oMcBlock = oThreadedFunction.oMcBlock;
807	for oVariation in oThreadedFunction.aoVariations:
808	# Function header
809	oOut.write( '\n'
810	+ '\n'
811	+ '/**\n'
812	+ ' * %s at line %s offset %s in %s%s\n'
813	% (oMcBlock.sFunction, oMcBlock.iBeginLine, oMcBlock.offBeginLine,
814	os.path.split(oMcBlock.sSrcFile)[1],
815	' (macro expansion)' if oMcBlock.iBeginLine == oMcBlock.iEndLine else '')
816	+ ' */\n'
817	+ 'static IEM_DECL_IMPL_DEF(VBOXSTRICTRC, ' + oVariation.getFunctionName() + ',\n'
818	+ ' ' + sParamList
819	+ '{\n');
820
821	aasVars = [];
822	for aoRefs in oVariation.dParamRefs.values():
823	oRef = aoRefs[0];
824	if oRef.sType[0] != 'P':
825	cBits = g_kdTypeInfo[oRef.sType][0];
826	sType = g_kdTypeInfo[oRef.sType][2];
827	else:
828	cBits = 64;
829	sType = oRef.sType;
830
831	sTypeDecl = sType + ' const';
832
833	if cBits == 64:
834	assert oRef.offNewParam == 0;
835	if sType == 'uint64_t':
836	sUnpack = 'uParam%s;' % (oRef.iNewParam,);
837	else:
838	sUnpack = '(%s)uParam%s;' % (sType, oRef.iNewParam,);
839	elif oRef.offNewParam == 0:
840	sUnpack = '(%s)(uParam%s & %s);' % (sType, oRef.iNewParam, self.ksBitsToIntMask[cBits]);
841	else:
842	sUnpack = '(%s)((uParam%s >> %s) & %s);' \
843	% (sType, oRef.iNewParam, oRef.offNewParam, self.ksBitsToIntMask[cBits]);
844
845	sComment = '/* %s - %s ref%s */' % (oRef.sOrgRef, len(aoRefs), 's' if len(aoRefs) != 1 else '',);
846
847	aasVars.append([ '%s:%02u' % (oRef.iNewParam, oRef.offNewParam), sTypeDecl, oRef.sNewName, sUnpack, sComment ]);
848	acchVars = [0, 0, 0, 0, 0];
849	for asVar in aasVars:
850	for iCol, sStr in enumerate(asVar):
851	acchVars[iCol] = max(acchVars[iCol], len(sStr));
852	sFmt = ' %%-%ss %%-%ss = %%-%ss %%s\n' % (acchVars[1], acchVars[2], acchVars[3]);
853	for asVar in sorted(aasVars):
854	oOut.write(sFmt % (asVar[1], asVar[2], asVar[3], asVar[4],));
855
856	# RT_NOREF for unused parameters.
857	if oVariation.cMinParams < g_kcThreadedParams:
858	oOut.write(' RT_NOREF('
859	+ ', '.join(['uParam%u' % (i,) for i in range(oVariation.cMinParams, g_kcThreadedParams)])
860	+ ');\n');
861
862	# Now for the actual statements.
863	oOut.write(iai.McStmt.renderCodeForList(oVariation.aoStmtsForThreadedFunction, cchIndent = 4));
864
865	oOut.write('}\n');
866
867
868	#
869	# Emit the function table.
870	#
871	oOut.write( '\n'
872	+ '\n'
873	+ '/**\n'
874	+ ' * Function table.\n'
875	+ ' */\n'
876	+ 'const PFNIEMTHREADEDFUNC g_apfnIemThreadedFunctions[kIemThreadedFunc_End] =\n'
877	+ '{\n'
878	+ ' /Invalid/ NULL, \n');
879	iThreadedFunction = 0;
880	for oThreadedFunction in self.aoThreadedFuncs:
881	for oVariation in oThreadedFunction.aoVariations:
882	iThreadedFunction += 1;
883	oOut.write(' /%4u/ %s,\n' % (iThreadedFunction, oVariation.getFunctionName(),));
884	oOut.write('};\n');
885
886	return True;
887
888	def getThreadedFunctionByIndex(self, idx):
889	"""
890	Returns a ThreadedFunction object for the given index. If the index is
891	out of bounds, a dummy is returned.
892	"""
893	if idx < len(self.aoThreadedFuncs):
894	return self.aoThreadedFuncs[idx];
895	return ThreadedFunction.dummyInstance();
896
897	def findEndOfMcEndStmt(self, sLine, offEndStmt):
898	"""
899	Helper that returns the line offset following the 'IEM_MC_END();'.
900	"""
901	assert sLine[offEndStmt:].startswith('IEM_MC_END');
902	off = sLine.find(';', offEndStmt + len('IEM_MC_END'));
903	assert off > 0, 'sLine="%s"' % (sLine, );
904	return off + 1 if off > 0 else 99999998;
905
906	def generateModifiedInput(self, oOut):
907	"""
908	Generates the combined modified input source/header file.
909	Returns success indicator.
910	"""
911	#
912	# File header.
913	#
914	oOut.write('\n'.join(self.generateLicenseHeader()));
915
916	#
917	# ASSUMING that g_aoMcBlocks/self.aoThreadedFuncs are in self.aoParsers
918	# order, we iterate aoThreadedFuncs in parallel to the lines from the
919	# parsers and apply modifications where required.
920	#
921	iThreadedFunction = 0;
922	oThreadedFunction = self.getThreadedFunctionByIndex(0);
923	for oParser in self.aoParsers: # IEMAllInstructionsPython.SimpleParser
924	oOut.write("\n\n/* **** BEGIN %s ***** */\n" % (oParser.sSrcFile,));
925
926	iLine = 0;
927	while iLine < len(oParser.asLines):
928	sLine = oParser.asLines[iLine];
929	iLine += 1; # iBeginLine and iEndLine are 1-based.
930
931	# Can we pass it thru?
932	if ( iLine not in [oThreadedFunction.oMcBlock.iBeginLine, oThreadedFunction.oMcBlock.iEndLine]
933	or oThreadedFunction.oMcBlock.sSrcFile != oParser.sSrcFile):
934	oOut.write(sLine);
935	#
936	# Single MC block. Just extract it and insert the replacement.
937	#
938	elif oThreadedFunction.oMcBlock.iBeginLine != oThreadedFunction.oMcBlock.iEndLine:
939	assert sLine.count('IEM_MC_') == 1;
940	oOut.write(sLine[:oThreadedFunction.oMcBlock.offBeginLine]);
941	sModified = oThreadedFunction.generateInputCode().strip();
942	oOut.write(sModified);
943
944	iLine = oThreadedFunction.oMcBlock.iEndLine;
945	sLine = oParser.asLines[iLine - 1];
946	assert sLine.count('IEM_MC_') == 1;
947	oOut.write(sLine[self.findEndOfMcEndStmt(sLine, oThreadedFunction.oMcBlock.offEndLine) : ]);
948
949	# Advance
950	iThreadedFunction += 1;
951	oThreadedFunction = self.getThreadedFunctionByIndex(iThreadedFunction);
952	#
953	# Macro expansion line that have sublines and may contain multiple MC blocks.
954	#
955	else:
956	offLine = 0;
957	while iLine == oThreadedFunction.oMcBlock.iBeginLine:
958	oOut.write(sLine[offLine : oThreadedFunction.oMcBlock.offBeginLine]);
959
960	sModified = oThreadedFunction.generateInputCode().strip();
961	assert sModified.startswith('IEM_MC_BEGIN'), 'sModified="%s"' % (sModified,);
962	oOut.write(sModified);
963
964	offLine = self.findEndOfMcEndStmt(sLine, oThreadedFunction.oMcBlock.offEndLine);
965
966	# Advance
967	iThreadedFunction += 1;
968	oThreadedFunction = self.getThreadedFunctionByIndex(iThreadedFunction);
969
970	# Last line segment.
971	if offLine < len(sLine):
972	oOut.write(sLine[offLine : ]);
973
974	oOut.write("/* **** END %s ***** */\n" % (oParser.sSrcFile,));
975
976	return True;
977
978	#
979	# Main
980	#
981
982	def main(self, asArgs):
983	"""
984	C-like main function.
985	Returns exit code.
986	"""
987
988	#
989	# Parse arguments
990	#
991	sScriptDir = os.path.dirname(__file__);
992	oParser = argparse.ArgumentParser(add_help = False);
993	oParser.add_argument('asInFiles', metavar = 'input.cpp.h', nargs = '*',
994	default = [os.path.join(sScriptDir, asFM[0]) for asFM in iai.g_aasAllInstrFilesAndDefaultMap],
995	help = "Selection of VMMAll/IEMAllInstructions*.cpp.h files to use as input.");
996	oParser.add_argument('--out-funcs-hdr', metavar = 'file-funcs.h', dest = 'sOutFileFuncsHdr', action = 'store',
997	default = '-', help = 'The output header file for the functions.');
998	oParser.add_argument('--out-funcs-cpp', metavar = 'file-funcs.cpp', dest = 'sOutFileFuncsCpp', action = 'store',
999	default = '-', help = 'The output C++ file for the functions.');
1000	oParser.add_argument('--out-mod-input', metavar = 'file-instr.cpp.h', dest = 'sOutFileModInput', action = 'store',
1001	default = '-', help = 'The output C++/header file for the modified input instruction files.');
1002	oParser.add_argument('--help', '-h', '-?', action = 'help', help = 'Display help and exit.');
1003	oParser.add_argument('--version', '-V', action = 'version',
1004	version = 'r%s (IEMAllThreadedPython.py), r%s (IEMAllInstructionsPython.py)'
1005	% (__version__.split()[1], iai.__version__.split()[1],),
1006	help = 'Displays the version/revision of the script and exit.');
1007	self.oOptions = oParser.parse_args(asArgs[1:]);
1008	print("oOptions=%s" % (self.oOptions,));
1009
1010	#
1011	# Process the instructions specified in the IEM sources.
1012	#
1013	if self.processInputFiles():
1014	#
1015	# Generate the output files.
1016	#
1017	aaoOutputFiles = (
1018	( self.oOptions.sOutFileFuncsHdr, self.generateThreadedFunctionsHeader ),
1019	( self.oOptions.sOutFileFuncsCpp, self.generateThreadedFunctionsSource ),
1020	( self.oOptions.sOutFileModInput, self.generateModifiedInput ),
1021	);
1022	fRc = True;
1023	for sOutFile, fnGenMethod in aaoOutputFiles:
1024	if sOutFile == '-':
1025	fRc = fnGenMethod(sys.stdout) and fRc;
1026	else:
1027	try:
1028	oOut = open(sOutFile, 'w'); # pylint: disable=consider-using-with,unspecified-encoding
1029	except Exception as oXcpt:
1030	print('error! Failed open "%s" for writing: %s' % (sOutFile, oXcpt,), file = sys.stderr);
1031	return 1;
1032	fRc = fnGenMethod(oOut) and fRc;
1033	oOut.close();
1034	if fRc:
1035	return 0;
1036
1037	return 1;
1038
1039
1040	if __name__ == '__main__':
1041	sys.exit(IEMThreadedGenerator().main(sys.argv));
1042

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source: vbox/trunk/src/VBox/VMM/VMMAll/IEMAllThreadedPython.py@ 99208

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