Z3
 
Loading...
Searching...
No Matches
FPNumRef Class Reference
+ Inheritance diagram for FPNumRef:

Public Member Functions

 sign (self)
 
 sign_as_bv (self)
 
 significand (self)
 
 significand_as_long (self)
 
 significand_as_bv (self)
 
 exponent (self, biased=True)
 
 exponent_as_long (self, biased=True)
 
 exponent_as_bv (self, biased=True)
 
 isNaN (self)
 
 isInf (self)
 
 isZero (self)
 
 isNormal (self)
 
 isSubnormal (self)
 
 isPositive (self)
 
 isNegative (self)
 
 as_string (self)
 
 py_value (self)
 
- Public Member Functions inherited from FPRef
 sort (self)
 
 ebits (self)
 
 sbits (self)
 
 __le__ (self, other)
 
 __lt__ (self, other)
 
 __ge__ (self, other)
 
 __gt__ (self, other)
 
 __add__ (self, other)
 
 __radd__ (self, other)
 
 __sub__ (self, other)
 
 __rsub__ (self, other)
 
 __mul__ (self, other)
 
 __rmul__ (self, other)
 
 __pos__ (self)
 
 __neg__ (self)
 
 __div__ (self, other)
 
 __rdiv__ (self, other)
 
 __truediv__ (self, other)
 
 __rtruediv__ (self, other)
 
 __mod__ (self, other)
 
 __rmod__ (self, other)
 
- Public Member Functions inherited from ExprRef
 as_ast (self)
 
 get_id (self)
 
 sort_kind (self)
 
 __eq__ (self, other)
 
 __hash__ (self)
 
 __ne__ (self, other)
 
 params (self)
 
 decl (self)
 
 kind (self)
 
 num_args (self)
 
 arg (self, idx)
 
 children (self)
 
 from_string (self, s)
 
 serialize (self)
 
- Public Member Functions inherited from AstRef
 __init__ (self, ast, ctx=None)
 
 __del__ (self)
 
 __deepcopy__ (self, memo={})
 
 __str__ (self)
 
 __repr__ (self)
 
 __eq__ (self, other)
 
 __hash__ (self)
 
 __nonzero__ (self)
 
 __bool__ (self)
 
 sexpr (self)
 
 ctx_ref (self)
 
 eq (self, other)
 
 translate (self, target)
 
 __copy__ (self)
 
 hash (self)
 
- Public Member Functions inherited from Z3PPObject
 use_pp (self)
 

Additional Inherited Members

- Data Fields inherited from AstRef
 ast = ast
 
 ctx = _get_ctx(ctx)
 
- Protected Member Functions inherited from Z3PPObject
 _repr_html_ (self)
 

Detailed Description

The sign of the numeral.

>>> x = FPVal(+1.0, FPSort(8, 24))
>>> x.sign()
False
>>> x = FPVal(-1.0, FPSort(8, 24))
>>> x.sign()
True

Definition at line 9962 of file z3py.py.

Member Function Documentation

◆ as_string()

as_string ( self)
Return a Z3 floating point expression as a Python string.

Reimplemented from FPRef.

Definition at line 10093 of file z3py.py.

10093 def as_string(self):
10094 s = Z3_get_numeral_string(self.ctx.ref(), self.as_ast())
10095 return ("FPVal(%s, %s)" % (s, self.sort()))
10096
Z3_string Z3_API Z3_get_numeral_string(Z3_context c, Z3_ast a)
Return numeral value, as a decimal string of a numeric constant term.

◆ exponent()

exponent ( self,
biased = True )

Definition at line 10026 of file z3py.py.

10026 def exponent(self, biased=True):
10027 return Z3_fpa_get_numeral_exponent_string(self.ctx.ref(), self.as_ast(), biased)
10028
Z3_string Z3_API Z3_fpa_get_numeral_exponent_string(Z3_context c, Z3_ast t, bool biased)
Return the exponent value of a floating-point numeral as a string.

◆ exponent_as_bv()

exponent_as_bv ( self,
biased = True )

Definition at line 10047 of file z3py.py.

10047 def exponent_as_bv(self, biased=True):
10048 return BitVecNumRef(Z3_fpa_get_numeral_exponent_bv(self.ctx.ref(), self.as_ast(), biased), self.ctx)
10049
Z3_ast Z3_API Z3_fpa_get_numeral_exponent_bv(Z3_context c, Z3_ast t, bool biased)
Retrieves the exponent of a floating-point literal as a bit-vector expression.

◆ exponent_as_long()

exponent_as_long ( self,
biased = True )

Definition at line 10036 of file z3py.py.

10036 def exponent_as_long(self, biased=True):
10037 ptr = (ctypes.c_longlong * 1)()
10038 if not Z3_fpa_get_numeral_exponent_int64(self.ctx.ref(), self.as_ast(), ptr, biased):
10039 raise Z3Exception("error retrieving the exponent of a numeral.")
10040 return ptr[0]
10041
bool Z3_API Z3_fpa_get_numeral_exponent_int64(Z3_context c, Z3_ast t, int64_t *n, bool biased)
Return the exponent value of a floating-point numeral as a signed 64-bit integer.

◆ isInf()

isInf ( self)

Definition at line 10057 of file z3py.py.

10057 def isInf(self):
10058 return Z3_fpa_is_numeral_inf(self.ctx.ref(), self.as_ast())
10059
bool Z3_API Z3_fpa_is_numeral_inf(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is a +oo or -oo.

◆ isNaN()

isNaN ( self)

Definition at line 10052 of file z3py.py.

10052 def isNaN(self):
10053 return Z3_fpa_is_numeral_nan(self.ctx.ref(), self.as_ast())
10054
bool Z3_API Z3_fpa_is_numeral_nan(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is a NaN.

◆ isNegative()

isNegative ( self)

Definition at line 10082 of file z3py.py.

10082 def isNegative(self):
10083 return Z3_fpa_is_numeral_negative(self.ctx.ref(), self.as_ast())
10084
bool Z3_API Z3_fpa_is_numeral_negative(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is negative.

◆ isNormal()

isNormal ( self)

Definition at line 10067 of file z3py.py.

10067 def isNormal(self):
10068 return Z3_fpa_is_numeral_normal(self.ctx.ref(), self.as_ast())
10069
bool Z3_API Z3_fpa_is_numeral_normal(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is normal.

◆ isPositive()

isPositive ( self)

Definition at line 10077 of file z3py.py.

10077 def isPositive(self):
10078 return Z3_fpa_is_numeral_positive(self.ctx.ref(), self.as_ast())
10079
bool Z3_API Z3_fpa_is_numeral_positive(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is positive.

◆ isSubnormal()

isSubnormal ( self)

Definition at line 10072 of file z3py.py.

10072 def isSubnormal(self):
10073 return Z3_fpa_is_numeral_subnormal(self.ctx.ref(), self.as_ast())
10074
bool Z3_API Z3_fpa_is_numeral_subnormal(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is subnormal.

◆ isZero()

isZero ( self)

Definition at line 10062 of file z3py.py.

10062 def isZero(self):
10063 return Z3_fpa_is_numeral_zero(self.ctx.ref(), self.as_ast())
10064
bool Z3_API Z3_fpa_is_numeral_zero(Z3_context c, Z3_ast t)
Checks whether a given floating-point numeral is +zero or -zero.

◆ py_value()

py_value ( self)
Return a Python value that is equivalent to `self`.

Reimplemented from AstRef.

Definition at line 10097 of file z3py.py.

10097 def py_value(self):
10098 bv = simplify(fpToIEEEBV(self))
10099 binary = bv.py_value()
10100 if not isinstance(binary, int):
10101 return None
10102 # Decode the IEEE 754 binary representation
10103 import struct
10104 bytes_rep = binary.to_bytes(8, byteorder='big')
10105 return struct.unpack('>d', bytes_rep)[0]
10106
10107

◆ sign()

sign ( self)

Definition at line 9973 of file z3py.py.

9973 def sign(self):
9974 num = (ctypes.c_int)()
9975 nsign = Z3_fpa_get_numeral_sign(self.ctx.ref(), self.as_ast(), byref(num))
9976 if nsign is False:
9977 raise Z3Exception("error retrieving the sign of a numeral.")
9978 return num.value != 0
9979
bool Z3_API Z3_fpa_get_numeral_sign(Z3_context c, Z3_ast t, int *sgn)
Retrieves the sign of a floating-point literal.

◆ sign_as_bv()

sign_as_bv ( self)

Definition at line 9985 of file z3py.py.

9985 def sign_as_bv(self):
9986 return BitVecNumRef(Z3_fpa_get_numeral_sign_bv(self.ctx.ref(), self.as_ast()), self.ctx)
9987
Z3_ast Z3_API Z3_fpa_get_numeral_sign_bv(Z3_context c, Z3_ast t)
Retrieves the sign of a floating-point literal as a bit-vector expression.

◆ significand()

significand ( self)

Definition at line 9995 of file z3py.py.

9995 def significand(self):
9996 return Z3_fpa_get_numeral_significand_string(self.ctx.ref(), self.as_ast())
9997
Z3_string Z3_API Z3_fpa_get_numeral_significand_string(Z3_context c, Z3_ast t)
Return the significand value of a floating-point numeral as a string.

◆ significand_as_bv()

significand_as_bv ( self)

Definition at line 10016 of file z3py.py.

10016 def significand_as_bv(self):
10017 return BitVecNumRef(Z3_fpa_get_numeral_significand_bv(self.ctx.ref(), self.as_ast()), self.ctx)
10018
Z3_ast Z3_API Z3_fpa_get_numeral_significand_bv(Z3_context c, Z3_ast t)
Retrieves the significand of a floating-point literal as a bit-vector expression.

◆ significand_as_long()

significand_as_long ( self)

Definition at line 10005 of file z3py.py.

10005 def significand_as_long(self):
10006 ptr = (ctypes.c_ulonglong * 1)()
10007 if not Z3_fpa_get_numeral_significand_uint64(self.ctx.ref(), self.as_ast(), ptr):
10008 raise Z3Exception("error retrieving the significand of a numeral.")
10009 return ptr[0]
10010
bool Z3_API Z3_fpa_get_numeral_significand_uint64(Z3_context c, Z3_ast t, uint64_t *n)
Return the significand value of a floating-point numeral as a uint64.