arch: Split the operand types out of the ISA parser.
These conceptually go together and don't depend on any other parts of
the parser.
Change-Id: Ia8bff0d0ec210bdeeb080808968faf9528ee03dd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/35278
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/src/arch/isa_parser/isa_parser.py b/src/arch/isa_parser/isa_parser.py
index 955d4e2..c147caf 100755
--- a/src/arch/isa_parser/isa_parser.py
+++ b/src/arch/isa_parser/isa_parser.py
@@ -46,6 +46,7 @@
from types import *
from m5.util.grammar import Grammar
+from .operand_types import *
debug=False
@@ -390,737 +391,6 @@
else:
return [ arg ]
-class Operand(object):
- '''Base class for operand descriptors. An instance of this class
- (or actually a class derived from this one) represents a specific
- operand for a code block (e.g, "Rc.sq" as a dest). Intermediate
- derived classes encapsulates the traits of a particular operand
- type (e.g., "32-bit integer register").'''
-
- def buildReadCode(self, func = None):
- subst_dict = {"name": self.base_name,
- "func": func,
- "reg_idx": self.reg_spec,
- "ctype": self.ctype}
- if hasattr(self, 'src_reg_idx'):
- subst_dict['op_idx'] = self.src_reg_idx
- code = self.read_code % subst_dict
- return '%s = %s;\n' % (self.base_name, code)
-
- def buildWriteCode(self, func = None):
- subst_dict = {"name": self.base_name,
- "func": func,
- "reg_idx": self.reg_spec,
- "ctype": self.ctype,
- "final_val": self.base_name}
- if hasattr(self, 'dest_reg_idx'):
- subst_dict['op_idx'] = self.dest_reg_idx
- code = self.write_code % subst_dict
- return '''
- {
- %s final_val = %s;
- %s;
- if (traceData) { traceData->setData(final_val); }
- }''' % (self.dflt_ctype, self.base_name, code)
-
- def __init__(self, parser, full_name, ext, is_src, is_dest):
- self.full_name = full_name
- self.ext = ext
- self.is_src = is_src
- self.is_dest = is_dest
- # The 'effective extension' (eff_ext) is either the actual
- # extension, if one was explicitly provided, or the default.
- if ext:
- self.eff_ext = ext
- elif hasattr(self, 'dflt_ext'):
- self.eff_ext = self.dflt_ext
-
- if hasattr(self, 'eff_ext'):
- self.ctype = parser.operandTypeMap[self.eff_ext]
-
- # Finalize additional fields (primarily code fields). This step
- # is done separately since some of these fields may depend on the
- # register index enumeration that hasn't been performed yet at the
- # time of __init__(). The register index enumeration is affected
- # by predicated register reads/writes. Hence, we forward the flags
- # that indicate whether or not predication is in use.
- def finalize(self, predRead, predWrite):
- self.flags = self.getFlags()
- self.constructor = self.makeConstructor(predRead, predWrite)
- self.op_decl = self.makeDecl()
-
- if self.is_src:
- self.op_rd = self.makeRead(predRead)
- self.op_src_decl = self.makeDecl()
- else:
- self.op_rd = ''
- self.op_src_decl = ''
-
- if self.is_dest:
- self.op_wb = self.makeWrite(predWrite)
- self.op_dest_decl = self.makeDecl()
- else:
- self.op_wb = ''
- self.op_dest_decl = ''
-
- def isMem(self):
- return 0
-
- def isReg(self):
- return 0
-
- def isFloatReg(self):
- return 0
-
- def isIntReg(self):
- return 0
-
- def isCCReg(self):
- return 0
-
- def isControlReg(self):
- return 0
-
- def isVecReg(self):
- return 0
-
- def isVecElem(self):
- return 0
-
- def isVecPredReg(self):
- return 0
-
- def isPCState(self):
- return 0
-
- def isPCPart(self):
- return self.isPCState() and self.reg_spec
-
- def hasReadPred(self):
- return self.read_predicate != None
-
- def hasWritePred(self):
- return self.write_predicate != None
-
- def getFlags(self):
- # note the empty slice '[:]' gives us a copy of self.flags[0]
- # instead of a reference to it
- my_flags = self.flags[0][:]
- if self.is_src:
- my_flags += self.flags[1]
- if self.is_dest:
- my_flags += self.flags[2]
- return my_flags
-
- def makeDecl(self):
- # Note that initializations in the declarations are solely
- # to avoid 'uninitialized variable' errors from the compiler.
- return self.ctype + ' ' + self.base_name + ' = 0;\n';
-
-
-src_reg_constructor = '\n\t_srcRegIdx[_numSrcRegs++] = RegId(%s, %s);'
-dst_reg_constructor = '\n\t_destRegIdx[_numDestRegs++] = RegId(%s, %s);'
-
-
-class IntRegOperand(Operand):
- reg_class = 'IntRegClass'
-
- def isReg(self):
- return 1
-
- def isIntReg(self):
- return 1
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
- if self.hasReadPred():
- c_src = '\n\tif (%s) {%s\n\t}' % \
- (self.read_predicate, c_src)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
- c_dest += '\n\t_numIntDestRegs++;'
- if self.hasWritePred():
- c_dest = '\n\tif (%s) {%s\n\t}' % \
- (self.write_predicate, c_dest)
-
- return c_src + c_dest
-
- def makeRead(self, predRead):
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to read integer register as FP')
- if self.read_code != None:
- return self.buildReadCode('readIntRegOperand')
-
- int_reg_val = ''
- if predRead:
- int_reg_val = 'xc->readIntRegOperand(this, _sourceIndex++)'
- if self.hasReadPred():
- int_reg_val = '(%s) ? %s : 0' % \
- (self.read_predicate, int_reg_val)
- else:
- int_reg_val = 'xc->readIntRegOperand(this, %d)' % self.src_reg_idx
-
- return '%s = %s;\n' % (self.base_name, int_reg_val)
-
- def makeWrite(self, predWrite):
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to write integer register as FP')
- if self.write_code != None:
- return self.buildWriteCode('setIntRegOperand')
-
- if predWrite:
- wp = 'true'
- if self.hasWritePred():
- wp = self.write_predicate
-
- wcond = 'if (%s)' % (wp)
- windex = '_destIndex++'
- else:
- wcond = ''
- windex = '%d' % self.dest_reg_idx
-
- wb = '''
- %s
- {
- %s final_val = %s;
- xc->setIntRegOperand(this, %s, final_val);\n
- if (traceData) { traceData->setData(final_val); }
- }''' % (wcond, self.ctype, self.base_name, windex)
-
- return wb
-
-class FloatRegOperand(Operand):
- reg_class = 'FloatRegClass'
-
- def isReg(self):
- return 1
-
- def isFloatReg(self):
- return 1
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
- c_dest += '\n\t_numFPDestRegs++;'
-
- return c_src + c_dest
-
- def makeRead(self, predRead):
- if self.read_code != None:
- return self.buildReadCode('readFloatRegOperandBits')
-
- if predRead:
- rindex = '_sourceIndex++'
- else:
- rindex = '%d' % self.src_reg_idx
-
- code = 'xc->readFloatRegOperandBits(this, %s)' % rindex
- if self.ctype == 'float':
- code = 'bitsToFloat32(%s)' % code
- elif self.ctype == 'double':
- code = 'bitsToFloat64(%s)' % code
- return '%s = %s;\n' % (self.base_name, code)
-
- def makeWrite(self, predWrite):
- if self.write_code != None:
- return self.buildWriteCode('setFloatRegOperandBits')
-
- if predWrite:
- wp = '_destIndex++'
- else:
- wp = '%d' % self.dest_reg_idx
-
- val = 'final_val'
- if self.ctype == 'float':
- val = 'floatToBits32(%s)' % val
- elif self.ctype == 'double':
- val = 'floatToBits64(%s)' % val
-
- wp = 'xc->setFloatRegOperandBits(this, %s, %s);' % (wp, val)
-
- wb = '''
- {
- %s final_val = %s;
- %s\n
- if (traceData) { traceData->setData(final_val); }
- }''' % (self.ctype, self.base_name, wp)
- return wb
-
-class VecRegOperand(Operand):
- reg_class = 'VecRegClass'
-
- def __init__(self, parser, full_name, ext, is_src, is_dest):
- Operand.__init__(self, parser, full_name, ext, is_src, is_dest)
- self.elemExt = None
- self.parser = parser
-
- def isReg(self):
- return 1
-
- def isVecReg(self):
- return 1
-
- def makeDeclElem(self, elem_op):
- (elem_name, elem_ext) = elem_op
- (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
- if elem_ext:
- ext = elem_ext
- else:
- ext = dflt_elem_ext
- ctype = self.parser.operandTypeMap[ext]
- return '\n\t%s %s = 0;' % (ctype, elem_name)
-
- def makeDecl(self):
- if not self.is_dest and self.is_src:
- c_decl = '\t/* Vars for %s*/' % (self.base_name)
- if hasattr(self, 'active_elems'):
- if self.active_elems:
- for elem in self.active_elems:
- c_decl += self.makeDeclElem(elem)
- return c_decl + '\t/* End vars for %s */\n' % (self.base_name)
- else:
- return ''
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- numAccessNeeded = 1
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
- c_dest += '\n\t_numVecDestRegs++;'
-
- return c_src + c_dest
-
- # Read destination register to write
- def makeReadWElem(self, elem_op):
- (elem_name, elem_ext) = elem_op
- (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
- if elem_ext:
- ext = elem_ext
- else:
- ext = dflt_elem_ext
- ctype = self.parser.operandTypeMap[ext]
- c_read = '\t\t%s& %s = %s[%s];\n' % \
- (ctype, elem_name, self.base_name, elem_spec)
- return c_read
-
- def makeReadW(self, predWrite):
- func = 'getWritableVecRegOperand'
- if self.read_code != None:
- return self.buildReadCode(func)
-
- if predWrite:
- rindex = '_destIndex++'
- else:
- rindex = '%d' % self.dest_reg_idx
-
- c_readw = '\t\t%s& tmp_d%s = xc->%s(this, %s);\n'\
- % ('TheISA::VecRegContainer', rindex, func, rindex)
- if self.elemExt:
- c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (self.base_name,
- rindex, self.parser.operandTypeMap[self.elemExt])
- if self.ext:
- c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (self.base_name,
- rindex, self.parser.operandTypeMap[self.ext])
- if hasattr(self, 'active_elems'):
- if self.active_elems:
- for elem in self.active_elems:
- c_readw += self.makeReadWElem(elem)
- return c_readw
-
- # Normal source operand read
- def makeReadElem(self, elem_op, name):
- (elem_name, elem_ext) = elem_op
- (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
-
- if elem_ext:
- ext = elem_ext
- else:
- ext = dflt_elem_ext
- ctype = self.parser.operandTypeMap[ext]
- c_read = '\t\t%s = %s[%s];\n' % \
- (elem_name, name, elem_spec)
- return c_read
-
- def makeRead(self, predRead):
- func = 'readVecRegOperand'
- if self.read_code != None:
- return self.buildReadCode(func)
-
- if predRead:
- rindex = '_sourceIndex++'
- else:
- rindex = '%d' % self.src_reg_idx
-
- name = self.base_name
- if self.is_dest and self.is_src:
- name += '_merger'
-
- c_read = '\t\t%s& tmp_s%s = xc->%s(this, %s);\n' \
- % ('const TheISA::VecRegContainer', rindex, func, rindex)
- # If the parser has detected that elements are being access, create
- # the appropriate view
- if self.elemExt:
- c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % \
- (name, rindex, self.parser.operandTypeMap[self.elemExt])
- if self.ext:
- c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % \
- (name, rindex, self.parser.operandTypeMap[self.ext])
- if hasattr(self, 'active_elems'):
- if self.active_elems:
- for elem in self.active_elems:
- c_read += self.makeReadElem(elem, name)
- return c_read
-
- def makeWrite(self, predWrite):
- func = 'setVecRegOperand'
- if self.write_code != None:
- return self.buildWriteCode(func)
-
- wb = '''
- if (traceData) {
- traceData->setData(tmp_d%d);
- }
- ''' % self.dest_reg_idx
- return wb
-
- def finalize(self, predRead, predWrite):
- super(VecRegOperand, self).finalize(predRead, predWrite)
- if self.is_dest:
- self.op_rd = self.makeReadW(predWrite) + self.op_rd
-
-class VecElemOperand(Operand):
- reg_class = 'VecElemClass'
-
- def isReg(self):
- return 1
-
- def isVecElem(self):
- return 1
-
- def makeDecl(self):
- if self.is_dest and not self.is_src:
- return '\n\t%s %s;' % (self.ctype, self.base_name)
- else:
- return ''
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- numAccessNeeded = 1
-
- if self.is_src:
- c_src = ('\n\t_srcRegIdx[_numSrcRegs++] = RegId(%s, %s, %s);' %
- (self.reg_class, self.reg_spec, self.elem_spec))
-
- if self.is_dest:
- c_dest = ('\n\t_destRegIdx[_numDestRegs++] = RegId(%s, %s, %s);' %
- (self.reg_class, self.reg_spec, self.elem_spec))
- c_dest += '\n\t_numVecElemDestRegs++;'
- return c_src + c_dest
-
- def makeRead(self, predRead):
- c_read = 'xc->readVecElemOperand(this, %d)' % self.src_reg_idx
-
- if self.ctype == 'float':
- c_read = 'bitsToFloat32(%s)' % c_read
- elif self.ctype == 'double':
- c_read = 'bitsToFloat64(%s)' % c_read
-
- return '\n\t%s %s = %s;\n' % (self.ctype, self.base_name, c_read)
-
- def makeWrite(self, predWrite):
- if self.ctype == 'float':
- c_write = 'floatToBits32(%s)' % self.base_name
- elif self.ctype == 'double':
- c_write = 'floatToBits64(%s)' % self.base_name
- else:
- c_write = self.base_name
-
- c_write = ('\n\txc->setVecElemOperand(this, %d, %s);' %
- (self.dest_reg_idx, c_write))
-
- return c_write
-
-class VecPredRegOperand(Operand):
- reg_class = 'VecPredRegClass'
-
- def __init__(self, parser, full_name, ext, is_src, is_dest):
- Operand.__init__(self, parser, full_name, ext, is_src, is_dest)
- self.parser = parser
-
- def isReg(self):
- return 1
-
- def isVecPredReg(self):
- return 1
-
- def makeDecl(self):
- return ''
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
- c_dest += '\n\t_numVecPredDestRegs++;'
-
- return c_src + c_dest
-
- def makeRead(self, predRead):
- func = 'readVecPredRegOperand'
- if self.read_code != None:
- return self.buildReadCode(func)
-
- if predRead:
- rindex = '_sourceIndex++'
- else:
- rindex = '%d' % self.src_reg_idx
-
- c_read = '\t\t%s& tmp_s%s = xc->%s(this, %s);\n' % (
- 'const TheISA::VecPredRegContainer', rindex, func, rindex)
- if self.ext:
- c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % (
- self.base_name, rindex,
- self.parser.operandTypeMap[self.ext])
- return c_read
-
- def makeReadW(self, predWrite):
- func = 'getWritableVecPredRegOperand'
- if self.read_code != None:
- return self.buildReadCode(func)
-
- if predWrite:
- rindex = '_destIndex++'
- else:
- rindex = '%d' % self.dest_reg_idx
-
- c_readw = '\t\t%s& tmp_d%s = xc->%s(this, %s);\n' % (
- 'TheISA::VecPredRegContainer', rindex, func, rindex)
- if self.ext:
- c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (
- self.base_name, rindex,
- self.parser.operandTypeMap[self.ext])
- return c_readw
-
- def makeWrite(self, predWrite):
- func = 'setVecPredRegOperand'
- if self.write_code != None:
- return self.buildWriteCode(func)
-
- wb = '''
- if (traceData) {
- traceData->setData(tmp_d%d);
- }
- ''' % self.dest_reg_idx
- return wb
-
- def finalize(self, predRead, predWrite):
- super(VecPredRegOperand, self).finalize(predRead, predWrite)
- if self.is_dest:
- self.op_rd = self.makeReadW(predWrite) + self.op_rd
-
-class CCRegOperand(Operand):
- reg_class = 'CCRegClass'
-
- def isReg(self):
- return 1
-
- def isCCReg(self):
- return 1
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
- if self.hasReadPred():
- c_src = '\n\tif (%s) {%s\n\t}' % \
- (self.read_predicate, c_src)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
- c_dest += '\n\t_numCCDestRegs++;'
- if self.hasWritePred():
- c_dest = '\n\tif (%s) {%s\n\t}' % \
- (self.write_predicate, c_dest)
-
- return c_src + c_dest
-
- def makeRead(self, predRead):
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to read condition-code register as FP')
- if self.read_code != None:
- return self.buildReadCode('readCCRegOperand')
-
- int_reg_val = ''
- if predRead:
- int_reg_val = 'xc->readCCRegOperand(this, _sourceIndex++)'
- if self.hasReadPred():
- int_reg_val = '(%s) ? %s : 0' % \
- (self.read_predicate, int_reg_val)
- else:
- int_reg_val = 'xc->readCCRegOperand(this, %d)' % self.src_reg_idx
-
- return '%s = %s;\n' % (self.base_name, int_reg_val)
-
- def makeWrite(self, predWrite):
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to write condition-code register as FP')
- if self.write_code != None:
- return self.buildWriteCode('setCCRegOperand')
-
- if predWrite:
- wp = 'true'
- if self.hasWritePred():
- wp = self.write_predicate
-
- wcond = 'if (%s)' % (wp)
- windex = '_destIndex++'
- else:
- wcond = ''
- windex = '%d' % self.dest_reg_idx
-
- wb = '''
- %s
- {
- %s final_val = %s;
- xc->setCCRegOperand(this, %s, final_val);\n
- if (traceData) { traceData->setData(final_val); }
- }''' % (wcond, self.ctype, self.base_name, windex)
-
- return wb
-
-class ControlRegOperand(Operand):
- reg_class = 'MiscRegClass'
-
- def isReg(self):
- return 1
-
- def isControlReg(self):
- return 1
-
- def makeConstructor(self, predRead, predWrite):
- c_src = ''
- c_dest = ''
-
- if self.is_src:
- c_src = src_reg_constructor % (self.reg_class, self.reg_spec)
-
- if self.is_dest:
- c_dest = dst_reg_constructor % (self.reg_class, self.reg_spec)
-
- return c_src + c_dest
-
- def makeRead(self, predRead):
- bit_select = 0
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to read control register as FP')
- if self.read_code != None:
- return self.buildReadCode('readMiscRegOperand')
-
- if predRead:
- rindex = '_sourceIndex++'
- else:
- rindex = '%d' % self.src_reg_idx
-
- return '%s = xc->readMiscRegOperand(this, %s);\n' % \
- (self.base_name, rindex)
-
- def makeWrite(self, predWrite):
- if (self.ctype == 'float' or self.ctype == 'double'):
- error('Attempt to write control register as FP')
- if self.write_code != None:
- return self.buildWriteCode('setMiscRegOperand')
-
- if predWrite:
- windex = '_destIndex++'
- else:
- windex = '%d' % self.dest_reg_idx
-
- wb = 'xc->setMiscRegOperand(this, %s, %s);\n' % \
- (windex, self.base_name)
- wb += 'if (traceData) { traceData->setData(%s); }' % \
- self.base_name
-
- return wb
-
-class MemOperand(Operand):
- def isMem(self):
- return 1
-
- def makeConstructor(self, predRead, predWrite):
- return ''
-
- def makeDecl(self):
- # Declare memory data variable.
- return '%s %s = {};\n' % (self.ctype, self.base_name)
-
- def makeRead(self, predRead):
- if self.read_code != None:
- return self.buildReadCode()
- return ''
-
- def makeWrite(self, predWrite):
- if self.write_code != None:
- return self.buildWriteCode()
- return ''
-
-class PCStateOperand(Operand):
- def makeConstructor(self, predRead, predWrite):
- return ''
-
- def makeRead(self, predRead):
- if self.reg_spec:
- # A component of the PC state.
- return '%s = __parserAutoPCState.%s();\n' % \
- (self.base_name, self.reg_spec)
- else:
- # The whole PC state itself.
- return '%s = xc->pcState();\n' % self.base_name
-
- def makeWrite(self, predWrite):
- if self.reg_spec:
- # A component of the PC state.
- return '__parserAutoPCState.%s(%s);\n' % \
- (self.reg_spec, self.base_name)
- else:
- # The whole PC state itself.
- return 'xc->pcState(%s);\n' % self.base_name
-
- def makeDecl(self):
- ctype = 'TheISA::PCState'
- if self.isPCPart():
- ctype = self.ctype
- # Note that initializations in the declarations are solely
- # to avoid 'uninitialized variable' errors from the compiler.
- return '%s %s = 0;\n' % (ctype, self.base_name)
-
- def isPCState(self):
- return 1
-
class OperandList(object):
'''Find all the operands in the given code block. Returns an operand
descriptor list (instance of class OperandList).'''
diff --git a/src/arch/isa_parser/operand_types.py b/src/arch/isa_parser/operand_types.py
new file mode 100755
index 0000000..cd341d0
--- /dev/null
+++ b/src/arch/isa_parser/operand_types.py
@@ -0,0 +1,768 @@
+# Copyright (c) 2014, 2016, 2018-2019 ARM Limited
+# All rights reserved
+#
+# The license below extends only to copyright in the software and shall
+# not be construed as granting a license to any other intellectual
+# property including but not limited to intellectual property relating
+# to a hardware implementation of the functionality of the software
+# licensed hereunder. You may use the software subject to the license
+# terms below provided that you ensure that this notice is replicated
+# unmodified and in its entirety in all distributions of the software,
+# modified or unmodified, in source code or in binary form.
+#
+# Copyright (c) 2003-2005 The Regents of The University of Michigan
+# Copyright (c) 2013,2015 Advanced Micro Devices, Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+class Operand(object):
+ '''Base class for operand descriptors. An instance of this class
+ (or actually a class derived from this one) represents a specific
+ operand for a code block (e.g, "Rc.sq" as a dest). Intermediate
+ derived classes encapsulates the traits of a particular operand
+ type (e.g., "32-bit integer register").'''
+
+ src_reg_constructor = '\n\t_srcRegIdx[_numSrcRegs++] = RegId(%s, %s);'
+ dst_reg_constructor = '\n\t_destRegIdx[_numDestRegs++] = RegId(%s, %s);'
+
+ def buildReadCode(self, func = None):
+ subst_dict = {"name": self.base_name,
+ "func": func,
+ "reg_idx": self.reg_spec,
+ "ctype": self.ctype}
+ if hasattr(self, 'src_reg_idx'):
+ subst_dict['op_idx'] = self.src_reg_idx
+ code = self.read_code % subst_dict
+ return '%s = %s;\n' % (self.base_name, code)
+
+ def buildWriteCode(self, func = None):
+ subst_dict = {"name": self.base_name,
+ "func": func,
+ "reg_idx": self.reg_spec,
+ "ctype": self.ctype,
+ "final_val": self.base_name}
+ if hasattr(self, 'dest_reg_idx'):
+ subst_dict['op_idx'] = self.dest_reg_idx
+ code = self.write_code % subst_dict
+ return '''
+ {
+ %s final_val = %s;
+ %s;
+ if (traceData) { traceData->setData(final_val); }
+ }''' % (self.dflt_ctype, self.base_name, code)
+
+ def __init__(self, parser, full_name, ext, is_src, is_dest):
+ self.full_name = full_name
+ self.ext = ext
+ self.is_src = is_src
+ self.is_dest = is_dest
+ # The 'effective extension' (eff_ext) is either the actual
+ # extension, if one was explicitly provided, or the default.
+ if ext:
+ self.eff_ext = ext
+ elif hasattr(self, 'dflt_ext'):
+ self.eff_ext = self.dflt_ext
+
+ if hasattr(self, 'eff_ext'):
+ self.ctype = parser.operandTypeMap[self.eff_ext]
+
+ # Finalize additional fields (primarily code fields). This step
+ # is done separately since some of these fields may depend on the
+ # register index enumeration that hasn't been performed yet at the
+ # time of __init__(). The register index enumeration is affected
+ # by predicated register reads/writes. Hence, we forward the flags
+ # that indicate whether or not predication is in use.
+ def finalize(self, predRead, predWrite):
+ self.flags = self.getFlags()
+ self.constructor = self.makeConstructor(predRead, predWrite)
+ self.op_decl = self.makeDecl()
+
+ if self.is_src:
+ self.op_rd = self.makeRead(predRead)
+ self.op_src_decl = self.makeDecl()
+ else:
+ self.op_rd = ''
+ self.op_src_decl = ''
+
+ if self.is_dest:
+ self.op_wb = self.makeWrite(predWrite)
+ self.op_dest_decl = self.makeDecl()
+ else:
+ self.op_wb = ''
+ self.op_dest_decl = ''
+
+ def isMem(self):
+ return 0
+
+ def isReg(self):
+ return 0
+
+ def isFloatReg(self):
+ return 0
+
+ def isIntReg(self):
+ return 0
+
+ def isCCReg(self):
+ return 0
+
+ def isControlReg(self):
+ return 0
+
+ def isVecReg(self):
+ return 0
+
+ def isVecElem(self):
+ return 0
+
+ def isVecPredReg(self):
+ return 0
+
+ def isPCState(self):
+ return 0
+
+ def isPCPart(self):
+ return self.isPCState() and self.reg_spec
+
+ def hasReadPred(self):
+ return self.read_predicate != None
+
+ def hasWritePred(self):
+ return self.write_predicate != None
+
+ def getFlags(self):
+ # note the empty slice '[:]' gives us a copy of self.flags[0]
+ # instead of a reference to it
+ my_flags = self.flags[0][:]
+ if self.is_src:
+ my_flags += self.flags[1]
+ if self.is_dest:
+ my_flags += self.flags[2]
+ return my_flags
+
+ def makeDecl(self):
+ # Note that initializations in the declarations are solely
+ # to avoid 'uninitialized variable' errors from the compiler.
+ return self.ctype + ' ' + self.base_name + ' = 0;\n';
+
+
+class IntRegOperand(Operand):
+ reg_class = 'IntRegClass'
+
+ def isReg(self):
+ return 1
+
+ def isIntReg(self):
+ return 1
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+ if self.hasReadPred():
+ c_src = '\n\tif (%s) {%s\n\t}' % \
+ (self.read_predicate, c_src)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+ c_dest += '\n\t_numIntDestRegs++;'
+ if self.hasWritePred():
+ c_dest = '\n\tif (%s) {%s\n\t}' % \
+ (self.write_predicate, c_dest)
+
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to read integer register as FP')
+ if self.read_code != None:
+ return self.buildReadCode('readIntRegOperand')
+
+ int_reg_val = ''
+ if predRead:
+ int_reg_val = 'xc->readIntRegOperand(this, _sourceIndex++)'
+ if self.hasReadPred():
+ int_reg_val = '(%s) ? %s : 0' % \
+ (self.read_predicate, int_reg_val)
+ else:
+ int_reg_val = 'xc->readIntRegOperand(this, %d)' % self.src_reg_idx
+
+ return '%s = %s;\n' % (self.base_name, int_reg_val)
+
+ def makeWrite(self, predWrite):
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to write integer register as FP')
+ if self.write_code != None:
+ return self.buildWriteCode('setIntRegOperand')
+
+ if predWrite:
+ wp = 'true'
+ if self.hasWritePred():
+ wp = self.write_predicate
+
+ wcond = 'if (%s)' % (wp)
+ windex = '_destIndex++'
+ else:
+ wcond = ''
+ windex = '%d' % self.dest_reg_idx
+
+ wb = '''
+ %s
+ {
+ %s final_val = %s;
+ xc->setIntRegOperand(this, %s, final_val);\n
+ if (traceData) { traceData->setData(final_val); }
+ }''' % (wcond, self.ctype, self.base_name, windex)
+
+ return wb
+
+class FloatRegOperand(Operand):
+ reg_class = 'FloatRegClass'
+
+ def isReg(self):
+ return 1
+
+ def isFloatReg(self):
+ return 1
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+ c_dest += '\n\t_numFPDestRegs++;'
+
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ if self.read_code != None:
+ return self.buildReadCode('readFloatRegOperandBits')
+
+ if predRead:
+ rindex = '_sourceIndex++'
+ else:
+ rindex = '%d' % self.src_reg_idx
+
+ code = 'xc->readFloatRegOperandBits(this, %s)' % rindex
+ if self.ctype == 'float':
+ code = 'bitsToFloat32(%s)' % code
+ elif self.ctype == 'double':
+ code = 'bitsToFloat64(%s)' % code
+ return '%s = %s;\n' % (self.base_name, code)
+
+ def makeWrite(self, predWrite):
+ if self.write_code != None:
+ return self.buildWriteCode('setFloatRegOperandBits')
+
+ if predWrite:
+ wp = '_destIndex++'
+ else:
+ wp = '%d' % self.dest_reg_idx
+
+ val = 'final_val'
+ if self.ctype == 'float':
+ val = 'floatToBits32(%s)' % val
+ elif self.ctype == 'double':
+ val = 'floatToBits64(%s)' % val
+
+ wp = 'xc->setFloatRegOperandBits(this, %s, %s);' % (wp, val)
+
+ wb = '''
+ {
+ %s final_val = %s;
+ %s\n
+ if (traceData) { traceData->setData(final_val); }
+ }''' % (self.ctype, self.base_name, wp)
+ return wb
+
+class VecRegOperand(Operand):
+ reg_class = 'VecRegClass'
+
+ def __init__(self, parser, full_name, ext, is_src, is_dest):
+ Operand.__init__(self, parser, full_name, ext, is_src, is_dest)
+ self.elemExt = None
+ self.parser = parser
+
+ def isReg(self):
+ return 1
+
+ def isVecReg(self):
+ return 1
+
+ def makeDeclElem(self, elem_op):
+ (elem_name, elem_ext) = elem_op
+ (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
+ if elem_ext:
+ ext = elem_ext
+ else:
+ ext = dflt_elem_ext
+ ctype = self.parser.operandTypeMap[ext]
+ return '\n\t%s %s = 0;' % (ctype, elem_name)
+
+ def makeDecl(self):
+ if not self.is_dest and self.is_src:
+ c_decl = '\t/* Vars for %s*/' % (self.base_name)
+ if hasattr(self, 'active_elems'):
+ if self.active_elems:
+ for elem in self.active_elems:
+ c_decl += self.makeDeclElem(elem)
+ return c_decl + '\t/* End vars for %s */\n' % (self.base_name)
+ else:
+ return ''
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ numAccessNeeded = 1
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+ c_dest += '\n\t_numVecDestRegs++;'
+
+ return c_src + c_dest
+
+ # Read destination register to write
+ def makeReadWElem(self, elem_op):
+ (elem_name, elem_ext) = elem_op
+ (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
+ if elem_ext:
+ ext = elem_ext
+ else:
+ ext = dflt_elem_ext
+ ctype = self.parser.operandTypeMap[ext]
+ c_read = '\t\t%s& %s = %s[%s];\n' % \
+ (ctype, elem_name, self.base_name, elem_spec)
+ return c_read
+
+ def makeReadW(self, predWrite):
+ func = 'getWritableVecRegOperand'
+ if self.read_code != None:
+ return self.buildReadCode(func)
+
+ if predWrite:
+ rindex = '_destIndex++'
+ else:
+ rindex = '%d' % self.dest_reg_idx
+
+ c_readw = '\t\t%s& tmp_d%s = xc->%s(this, %s);\n'\
+ % ('TheISA::VecRegContainer', rindex, func, rindex)
+ if self.elemExt:
+ c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (self.base_name,
+ rindex, self.parser.operandTypeMap[self.elemExt])
+ if self.ext:
+ c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (self.base_name,
+ rindex, self.parser.operandTypeMap[self.ext])
+ if hasattr(self, 'active_elems'):
+ if self.active_elems:
+ for elem in self.active_elems:
+ c_readw += self.makeReadWElem(elem)
+ return c_readw
+
+ # Normal source operand read
+ def makeReadElem(self, elem_op, name):
+ (elem_name, elem_ext) = elem_op
+ (elem_spec, dflt_elem_ext, zeroing) = self.elems[elem_name]
+
+ if elem_ext:
+ ext = elem_ext
+ else:
+ ext = dflt_elem_ext
+ ctype = self.parser.operandTypeMap[ext]
+ c_read = '\t\t%s = %s[%s];\n' % \
+ (elem_name, name, elem_spec)
+ return c_read
+
+ def makeRead(self, predRead):
+ func = 'readVecRegOperand'
+ if self.read_code != None:
+ return self.buildReadCode(func)
+
+ if predRead:
+ rindex = '_sourceIndex++'
+ else:
+ rindex = '%d' % self.src_reg_idx
+
+ name = self.base_name
+ if self.is_dest and self.is_src:
+ name += '_merger'
+
+ c_read = '\t\t%s& tmp_s%s = xc->%s(this, %s);\n' \
+ % ('const TheISA::VecRegContainer', rindex, func, rindex)
+ # If the parser has detected that elements are being access, create
+ # the appropriate view
+ if self.elemExt:
+ c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % \
+ (name, rindex, self.parser.operandTypeMap[self.elemExt])
+ if self.ext:
+ c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % \
+ (name, rindex, self.parser.operandTypeMap[self.ext])
+ if hasattr(self, 'active_elems'):
+ if self.active_elems:
+ for elem in self.active_elems:
+ c_read += self.makeReadElem(elem, name)
+ return c_read
+
+ def makeWrite(self, predWrite):
+ func = 'setVecRegOperand'
+ if self.write_code != None:
+ return self.buildWriteCode(func)
+
+ wb = '''
+ if (traceData) {
+ traceData->setData(tmp_d%d);
+ }
+ ''' % self.dest_reg_idx
+ return wb
+
+ def finalize(self, predRead, predWrite):
+ super(VecRegOperand, self).finalize(predRead, predWrite)
+ if self.is_dest:
+ self.op_rd = self.makeReadW(predWrite) + self.op_rd
+
+class VecElemOperand(Operand):
+ reg_class = 'VecElemClass'
+
+ def isReg(self):
+ return 1
+
+ def isVecElem(self):
+ return 1
+
+ def makeDecl(self):
+ if self.is_dest and not self.is_src:
+ return '\n\t%s %s;' % (self.ctype, self.base_name)
+ else:
+ return ''
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ numAccessNeeded = 1
+
+ if self.is_src:
+ c_src = ('\n\t_srcRegIdx[_numSrcRegs++] = RegId(%s, %s, %s);' %
+ (self.reg_class, self.reg_spec, self.elem_spec))
+
+ if self.is_dest:
+ c_dest = ('\n\t_destRegIdx[_numDestRegs++] = RegId(%s, %s, %s);' %
+ (self.reg_class, self.reg_spec, self.elem_spec))
+ c_dest += '\n\t_numVecElemDestRegs++;'
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ c_read = 'xc->readVecElemOperand(this, %d)' % self.src_reg_idx
+
+ if self.ctype == 'float':
+ c_read = 'bitsToFloat32(%s)' % c_read
+ elif self.ctype == 'double':
+ c_read = 'bitsToFloat64(%s)' % c_read
+
+ return '\n\t%s %s = %s;\n' % (self.ctype, self.base_name, c_read)
+
+ def makeWrite(self, predWrite):
+ if self.ctype == 'float':
+ c_write = 'floatToBits32(%s)' % self.base_name
+ elif self.ctype == 'double':
+ c_write = 'floatToBits64(%s)' % self.base_name
+ else:
+ c_write = self.base_name
+
+ c_write = ('\n\txc->setVecElemOperand(this, %d, %s);' %
+ (self.dest_reg_idx, c_write))
+
+ return c_write
+
+class VecPredRegOperand(Operand):
+ reg_class = 'VecPredRegClass'
+
+ def __init__(self, parser, full_name, ext, is_src, is_dest):
+ Operand.__init__(self, parser, full_name, ext, is_src, is_dest)
+ self.parser = parser
+
+ def isReg(self):
+ return 1
+
+ def isVecPredReg(self):
+ return 1
+
+ def makeDecl(self):
+ return ''
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+ c_dest += '\n\t_numVecPredDestRegs++;'
+
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ func = 'readVecPredRegOperand'
+ if self.read_code != None:
+ return self.buildReadCode(func)
+
+ if predRead:
+ rindex = '_sourceIndex++'
+ else:
+ rindex = '%d' % self.src_reg_idx
+
+ c_read = '\t\t%s& tmp_s%s = xc->%s(this, %s);\n' % (
+ 'const TheISA::VecPredRegContainer', rindex, func, rindex)
+ if self.ext:
+ c_read += '\t\tauto %s = tmp_s%s.as<%s>();\n' % (
+ self.base_name, rindex,
+ self.parser.operandTypeMap[self.ext])
+ return c_read
+
+ def makeReadW(self, predWrite):
+ func = 'getWritableVecPredRegOperand'
+ if self.read_code != None:
+ return self.buildReadCode(func)
+
+ if predWrite:
+ rindex = '_destIndex++'
+ else:
+ rindex = '%d' % self.dest_reg_idx
+
+ c_readw = '\t\t%s& tmp_d%s = xc->%s(this, %s);\n' % (
+ 'TheISA::VecPredRegContainer', rindex, func, rindex)
+ if self.ext:
+ c_readw += '\t\tauto %s = tmp_d%s.as<%s>();\n' % (
+ self.base_name, rindex,
+ self.parser.operandTypeMap[self.ext])
+ return c_readw
+
+ def makeWrite(self, predWrite):
+ func = 'setVecPredRegOperand'
+ if self.write_code != None:
+ return self.buildWriteCode(func)
+
+ wb = '''
+ if (traceData) {
+ traceData->setData(tmp_d%d);
+ }
+ ''' % self.dest_reg_idx
+ return wb
+
+ def finalize(self, predRead, predWrite):
+ super(VecPredRegOperand, self).finalize(predRead, predWrite)
+ if self.is_dest:
+ self.op_rd = self.makeReadW(predWrite) + self.op_rd
+
+class CCRegOperand(Operand):
+ reg_class = 'CCRegClass'
+
+ def isReg(self):
+ return 1
+
+ def isCCReg(self):
+ return 1
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+ if self.hasReadPred():
+ c_src = '\n\tif (%s) {%s\n\t}' % \
+ (self.read_predicate, c_src)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+ c_dest += '\n\t_numCCDestRegs++;'
+ if self.hasWritePred():
+ c_dest = '\n\tif (%s) {%s\n\t}' % \
+ (self.write_predicate, c_dest)
+
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to read condition-code register as FP')
+ if self.read_code != None:
+ return self.buildReadCode('readCCRegOperand')
+
+ int_reg_val = ''
+ if predRead:
+ int_reg_val = 'xc->readCCRegOperand(this, _sourceIndex++)'
+ if self.hasReadPred():
+ int_reg_val = '(%s) ? %s : 0' % \
+ (self.read_predicate, int_reg_val)
+ else:
+ int_reg_val = 'xc->readCCRegOperand(this, %d)' % self.src_reg_idx
+
+ return '%s = %s;\n' % (self.base_name, int_reg_val)
+
+ def makeWrite(self, predWrite):
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to write condition-code register as FP')
+ if self.write_code != None:
+ return self.buildWriteCode('setCCRegOperand')
+
+ if predWrite:
+ wp = 'true'
+ if self.hasWritePred():
+ wp = self.write_predicate
+
+ wcond = 'if (%s)' % (wp)
+ windex = '_destIndex++'
+ else:
+ wcond = ''
+ windex = '%d' % self.dest_reg_idx
+
+ wb = '''
+ %s
+ {
+ %s final_val = %s;
+ xc->setCCRegOperand(this, %s, final_val);\n
+ if (traceData) { traceData->setData(final_val); }
+ }''' % (wcond, self.ctype, self.base_name, windex)
+
+ return wb
+
+class ControlRegOperand(Operand):
+ reg_class = 'MiscRegClass'
+
+ def isReg(self):
+ return 1
+
+ def isControlReg(self):
+ return 1
+
+ def makeConstructor(self, predRead, predWrite):
+ c_src = ''
+ c_dest = ''
+
+ if self.is_src:
+ c_src = self.src_reg_constructor % (self.reg_class, self.reg_spec)
+
+ if self.is_dest:
+ c_dest = self.dst_reg_constructor % (self.reg_class, self.reg_spec)
+
+ return c_src + c_dest
+
+ def makeRead(self, predRead):
+ bit_select = 0
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to read control register as FP')
+ if self.read_code != None:
+ return self.buildReadCode('readMiscRegOperand')
+
+ if predRead:
+ rindex = '_sourceIndex++'
+ else:
+ rindex = '%d' % self.src_reg_idx
+
+ return '%s = xc->readMiscRegOperand(this, %s);\n' % \
+ (self.base_name, rindex)
+
+ def makeWrite(self, predWrite):
+ if (self.ctype == 'float' or self.ctype == 'double'):
+ error('Attempt to write control register as FP')
+ if self.write_code != None:
+ return self.buildWriteCode('setMiscRegOperand')
+
+ if predWrite:
+ windex = '_destIndex++'
+ else:
+ windex = '%d' % self.dest_reg_idx
+
+ wb = 'xc->setMiscRegOperand(this, %s, %s);\n' % \
+ (windex, self.base_name)
+ wb += 'if (traceData) { traceData->setData(%s); }' % \
+ self.base_name
+
+ return wb
+
+class MemOperand(Operand):
+ def isMem(self):
+ return 1
+
+ def makeConstructor(self, predRead, predWrite):
+ return ''
+
+ def makeDecl(self):
+ # Declare memory data variable.
+ return '%s %s = {};\n' % (self.ctype, self.base_name)
+
+ def makeRead(self, predRead):
+ if self.read_code != None:
+ return self.buildReadCode()
+ return ''
+
+ def makeWrite(self, predWrite):
+ if self.write_code != None:
+ return self.buildWriteCode()
+ return ''
+
+class PCStateOperand(Operand):
+ def makeConstructor(self, predRead, predWrite):
+ return ''
+
+ def makeRead(self, predRead):
+ if self.reg_spec:
+ # A component of the PC state.
+ return '%s = __parserAutoPCState.%s();\n' % \
+ (self.base_name, self.reg_spec)
+ else:
+ # The whole PC state itself.
+ return '%s = xc->pcState();\n' % self.base_name
+
+ def makeWrite(self, predWrite):
+ if self.reg_spec:
+ # A component of the PC state.
+ return '__parserAutoPCState.%s(%s);\n' % \
+ (self.reg_spec, self.base_name)
+ else:
+ # The whole PC state itself.
+ return 'xc->pcState(%s);\n' % self.base_name
+
+ def makeDecl(self):
+ ctype = 'TheISA::PCState'
+ if self.isPCPart():
+ ctype = self.ctype
+ # Note that initializations in the declarations are solely
+ # to avoid 'uninitialized variable' errors from the compiler.
+ return '%s %s = 0;\n' % (ctype, self.base_name)
+
+ def isPCState(self):
+ return 1
