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PEP8 formatting.

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This commit is contained in:
Jakob Stoklund Olesen
2016-05-12 13:37:03 -07:00
parent 6e17d229d0
commit ea46a17f56
8 changed files with 299 additions and 232 deletions
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3
meta/constant_hash.py
View File

@@ -6,6 +6,7 @@ don't attempt parfect hashing, but simply generate an open addressed
quadratically probed hash table. quadratically probed hash table.
""" """
def simple_hash(s): def simple_hash(s):
""" """
Compute a primitive hash of a string. Compute a primitive hash of a string.
@@ -21,6 +22,7 @@ def simple_hash(s):
h = ((h ^ ord(c)) + ((h >> 6) + (h << 26))) & 0xffffffff h = ((h ^ ord(c)) + ((h >> 6) + (h << 26))) & 0xffffffff
return h return h
def next_power_of_two(x): def next_power_of_two(x):
""" """
Compute the next power of two that is greater than `x`: Compute the next power of two that is greater than `x`:
@@ -41,6 +43,7 @@ def next_power_of_two(x):
s *= 2 s *= 2
return x + 1 return x + 1
def compute_quadratic(items, hash_function): def compute_quadratic(items, hash_function):
""" """
Compute an open addressed, quadratically probed hash table containing Compute an open addressed, quadratically probed hash table containing

63
meta/cretonne/__init__.py
View File

@@ -7,15 +7,20 @@ instructions.
import re import re
camel_re = re.compile('(^|_)([a-z])') camel_re = re.compile('(^|_)([a-z])')
def camel_case(s): def camel_case(s):
"""Convert the string s to CamelCase""" """Convert the string s to CamelCase"""
return camel_re.sub(lambda m: m.group(2).upper(), s) return camel_re.sub(lambda m: m.group(2).upper(), s)
# Concrete types. # Concrete types.
# #
# Instances (i8, i32, ...) are provided in the cretonne.types module. # Instances (i8, i32, ...) are provided in the cretonne.types module.
class Type(object): class Type(object):
"""A concrete value type.""" """A concrete value type."""
@@ -27,6 +32,7 @@ class Type(object):
def __str__(self): def __str__(self):
return self.name return self.name
class ScalarType(Type): class ScalarType(Type):
""" """
A concrete scalar (not vector) type. A concrete scalar (not vector) type.
@@ -55,6 +61,7 @@ class ScalarType(Type):
self._vectors[lanes] = v self._vectors[lanes] = v
return v return v
class VectorType(Type): class VectorType(Type):
""" """
A concrete SIMD vector type. A concrete SIMD vector type.
@@ -75,7 +82,9 @@ class VectorType(Type):
self.lanes = lanes self.lanes = lanes
def __repr__(self): def __repr__(self):
return 'VectorType(base={}, lanes={})'.format(self.base.name, self.lanes) return ('VectorType(base={}, lanes={})'
.format(self.base.name, self.lanes))
class IntType(ScalarType): class IntType(ScalarType):
"""A concrete scalar integer type.""" """A concrete scalar integer type."""
@@ -91,17 +100,20 @@ class IntType(ScalarType):
def __repr__(self): def __repr__(self):
return 'IntType(bits={})'.format(self.bits) return 'IntType(bits={})'.format(self.bits)
class FloatType(ScalarType): class FloatType(ScalarType):
"""A concrete scalar floating point type.""" """A concrete scalar floating point type."""
def __init__(self, bits, doc): def __init__(self, bits, doc):
assert bits > 0, 'FloatType must have positive number of bits' assert bits > 0, 'FloatType must have positive number of bits'
super(FloatType, self).__init__( name='f{:d}'.format(bits), membytes=bits/8, doc=doc) super(FloatType, self).__init__(name='f{:d}'.format(bits),
membytes=bits/8, doc=doc)
self.bits = bits self.bits = bits
def __repr__(self): def __repr__(self):
return 'FloatType(bits={})'.format(self.bits) return 'FloatType(bits={})'.format(self.bits)
class BoolType(ScalarType): class BoolType(ScalarType):
"""A concrete scalar boolean type.""" """A concrete scalar boolean type."""
@@ -116,9 +128,9 @@ class BoolType(ScalarType):
def __repr__(self): def __repr__(self):
return 'BoolType(bits={})'.format(self.bits) return 'BoolType(bits={})'.format(self.bits)
#
# Parametric polymorphism. # Parametric polymorphism.
#
class TypeVar(object): class TypeVar(object):
""" """
@@ -132,12 +144,13 @@ class TypeVar(object):
self.name = name self.name = name
self.__doc__ = doc self.__doc__ = doc
#
# Immediate operands. # Immediate operands.
# #
# Instances of immediate operand types are provided in the cretonne.immediates # Instances of immediate operand types are provided in the cretonne.immediates
# module. # module.
class ImmediateType(object): class ImmediateType(object):
""" """
The type of an immediate instruction operand. The type of an immediate instruction operand.
@@ -153,9 +166,9 @@ class ImmediateType(object):
def __repr__(self): def __repr__(self):
return 'ImmediateType({})'.format(self.name) return 'ImmediateType({})'.format(self.name)
#
# Defining instructions. # Defining instructions.
#
class InstructionGroup(object): class InstructionGroup(object):
""" """
@@ -178,7 +191,8 @@ class InstructionGroup(object):
added to this group. added to this group.
""" """
assert InstructionGroup._current is None, ( assert InstructionGroup._current is None, (
"Can't open {} since {} is already open".format(self, _current)) "Can't open {} since {} is already open"
.format(self, InstructionGroup._current))
InstructionGroup._current = self InstructionGroup._current = self
def close(self): def close(self):
@@ -187,7 +201,8 @@ class InstructionGroup(object):
opening another instruction group. opening another instruction group.
""" """
assert InstructionGroup._current is self, ( assert InstructionGroup._current is self, (
"Can't close {}, the open instuction group is {}".format(self, _current)) "Can't close {}, the open instuction group is {}"
.format(self, InstructionGroup._current))
InstructionGroup._current = None InstructionGroup._current = None
def __init__(self, name, doc): def __init__(self, name, doc):
@@ -198,9 +213,11 @@ class InstructionGroup(object):
@staticmethod @staticmethod
def append(inst): def append(inst):
assert InstructionGroup._current, "Open an instruction group before defining instructions." assert InstructionGroup._current, \
"Open an instruction group before defining instructions."
InstructionGroup._current.instructions.append(inst) InstructionGroup._current.instructions.append(inst)
class Operand(object): class Operand(object):
""" """
An instruction operand. An instruction operand.
@@ -212,12 +229,12 @@ class Operand(object):
concrete type. concrete type.
2. A :py:class:`TypeVar` instance indicates an SSA value operand, and the 2. A :py:class:`TypeVar` instance indicates an SSA value operand, and the
instruction is polymorphic over the possible concrete types that the type instruction is polymorphic over the possible concrete types that the
variable can assume. type variable can assume.
3. An :py:class:`ImmediateType` instance indicates an immediate operand 3. An :py:class:`ImmediateType` instance indicates an immediate operand
whose value is encoded in the instruction itself rather than being passed whose value is encoded in the instruction itself rather than being
as an SSA value. passed as an SSA value.
""" """
def __init__(self, name, typ, doc=''): def __init__(self, name, typ, doc=''):
@@ -231,19 +248,20 @@ class Operand(object):
else: else:
return self.typ.__doc__ return self.typ.__doc__
class Instruction(object): class Instruction(object):
""" """
An instruction. An instruction.
The operands to the instruction are specified as two tuples: ``ins`` and The operands to the instruction are specified as two tuples: ``ins`` and
``outs``. Since the Python singleton tuple syntax is a bit awkward, it is ``outs``. Since the Python singleton tuple syntax is a bit awkward, it is
allowed to specify a singleton as just the operand itself, i.e., `ins=x` and allowed to specify a singleton as just the operand itself, i.e., `ins=x`
`ins=(x,)` are both allowed and mean the same thing. and `ins=(x,)` are both allowed and mean the same thing.
:param name: Instruction mnemonic, also becomes opcode name. :param name: Instruction mnemonic, also becomes opcode name.
:param doc: Documentation string. :param doc: Documentation string.
:param ins: Tuple of input operands. This can be a mix of SSA value operands :param ins: Tuple of input operands. This can be a mix of SSA value
and immediate operands. operands and immediate operands.
:param outs: Tuple of output operands. The output operands can't be :param outs: Tuple of output operands. The output operands can't be
immediates. immediates.
""" """
@@ -258,8 +276,8 @@ class Instruction(object):
@staticmethod @staticmethod
def _to_operand_tuple(x): def _to_operand_tuple(x):
# Allow a single Operand instance instead of the awkward singleton tuple # Allow a single Operand instance instead of the awkward singleton
# syntax. # tuple syntax.
if isinstance(x, Operand): if isinstance(x, Operand):
x = (x,) x = (x,)
else: else:
@@ -268,9 +286,10 @@ class Instruction(object):
assert isinstance(op, Operand) assert isinstance(op, Operand)
return x return x
#
# Defining targets # Defining targets
#
class Target(object): class Target(object):
""" """
A target instruction set architecture. A target instruction set architecture.

155
meta/cretonne/base.py
View File

@@ -1,7 +1,8 @@
""" """
Cretonne base instruction set. Cretonne base instruction set.
This module defines the basic Cretonne instruction set that all targets support. This module defines the basic Cretonne instruction set that all targets
support.
""" """
from . import TypeVar, Operand, Instruction, InstructionGroup from . import TypeVar, Operand, Instruction, InstructionGroup
from types import i8, f32, f64 from types import i8, f32, f64
@@ -19,17 +20,19 @@ TxN = TypeVar('%Tx%N', 'A SIMD vector type')
N = Operand('N', imm64) N = Operand('N', imm64)
a = Operand('a', Int, doc='A constant integer scalar or vector value') a = Operand('a', Int, doc='A constant integer scalar or vector value')
iconst = Instruction('iconst', r""" iconst = Instruction(
'iconst', r"""
Integer constant. Integer constant.
Create a scalar integer SSA value with an immediate constant value, or an Create a scalar integer SSA value with an immediate constant value, or
integer vector where all the lanes have the same value. an integer vector where all the lanes have the same value.
""", """,
ins=N, outs=a) ins=N, outs=a)
N = Operand('N', ieee32) N = Operand('N', ieee32)
a = Operand('a', f32, doc='A constant integer scalar or vector value') a = Operand('a', f32, doc='A constant integer scalar or vector value')
f32const = Instruction('f32const', r""" f32const = Instruction(
'f32const', r"""
Floating point constant. Floating point constant.
Create a :type:`f32` SSA value with an immediate constant value, or a Create a :type:`f32` SSA value with an immediate constant value, or a
@@ -39,7 +42,8 @@ f32const = Instruction('f32const', r"""
N = Operand('N', ieee64) N = Operand('N', ieee64)
a = Operand('a', f64, doc='A constant integer scalar or vector value') a = Operand('a', f64, doc='A constant integer scalar or vector value')
f64const = Instruction('f64const', r""" f64const = Instruction(
'f64const', r"""
Floating point constant. Floating point constant.
Create a :type:`f64` SSA value with an immediate constant value, or a Create a :type:`f64` SSA value with an immediate constant value, or a
@@ -49,7 +53,8 @@ f64const = Instruction('f64const', r"""
N = Operand('N', immvector) N = Operand('N', immvector)
a = Operand('a', TxN, doc='A constant vector value') a = Operand('a', TxN, doc='A constant vector value')
vconst = Instruction('vconst', r""" vconst = Instruction(
'vconst', r"""
Vector constant (floating point or integer). Vector constant (floating point or integer).
Create a SIMD vector value where the lanes don't have to be identical. Create a SIMD vector value where the lanes don't have to be identical.
@@ -64,58 +69,65 @@ a = Operand('a', Int)
x = Operand('x', Int) x = Operand('x', Int)
y = Operand('y', Int) y = Operand('y', Int)
iadd = Instruction('iadd', r""" iadd = Instruction(
'iadd', r"""
Wrapping integer addition: :math:`a := x + y \pmod{2^B}`. Wrapping integer addition: :math:`a := x + y \pmod{2^B}`.
This instruction does not depend on the signed/unsigned interpretation of This instruction does not depend on the signed/unsigned interpretation
the operands. of the operands.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
isub = Instruction('isub', r""" isub = Instruction(
'isub', r"""
Wrapping integer subtraction: :math:`a := x - y \pmod{2^B}`. Wrapping integer subtraction: :math:`a := x - y \pmod{2^B}`.
This instruction does not depend on the signed/unsigned interpretation of This instruction does not depend on the signed/unsigned interpretation
the operands. of the operands.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
imul = Instruction('imul', r""" imul = Instruction(
'imul', r"""
Wrapping integer multiplication: :math:`a := x y \pmod{2^B}`. Wrapping integer multiplication: :math:`a := x y \pmod{2^B}`.
This instruction does not depend on the signed/unsigned interpretation of This instruction does not depend on the signed/unsigned interpretation
the of the
operands. operands.
Polymorphic over all integer types (vector and scalar). Polymorphic over all integer types (vector and scalar).
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
udiv = Instruction('udiv', r""" udiv = Instruction(
'udiv', r"""
Unsigned integer division: :math:`a := \lfloor {x \over y} \rfloor`. Unsigned integer division: :math:`a := \lfloor {x \over y} \rfloor`.
This operation traps if the divisor is zero. This operation traps if the divisor is zero.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
sdiv = Instruction('sdiv', r""" sdiv = Instruction(
Signed integer division rounded toward zero: :math:`a := sign(xy) \lfloor 'sdiv', r"""
{|x| \over |y|}\rfloor`. Signed integer division rounded toward zero: :math:`a := sign(xy)
\lfloor {|x| \over |y|}\rfloor`.
This operation traps if the divisor is zero, or if the result is not This operation traps if the divisor is zero, or if the result is not
representable in :math:`B` bits two's complement. This only happens when representable in :math:`B` bits two's complement. This only happens
:math:`x = -2^{B-1}, y = -1`. when :math:`x = -2^{B-1}, y = -1`.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
urem = Instruction('urem', """ urem = Instruction(
'urem', """
Unsigned integer remainder. Unsigned integer remainder.
This operation traps if the divisor is zero. This operation traps if the divisor is zero.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
srem = Instruction('srem', """ srem = Instruction(
'srem', """
Signed integer remainder. Signed integer remainder.
This operation traps if the divisor is zero. This operation traps if the divisor is zero.
@@ -132,7 +144,8 @@ a = Operand('a', iB)
x = Operand('x', iB) x = Operand('x', iB)
Y = Operand('Y', imm64) Y = Operand('Y', imm64)
iadd_imm = Instruction('iadd_imm', """ iadd_imm = Instruction(
'iadd_imm', """
Add immediate integer. Add immediate integer.
Same as :inst:`iadd`, but one operand is an immediate constant. Same as :inst:`iadd`, but one operand is an immediate constant.
@@ -142,50 +155,57 @@ iadd_imm = Instruction('iadd_imm', """
""", """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
imul_imm = Instruction('imul_imm', """ imul_imm = Instruction(
'imul_imm', """
Integer multiplication by immediate constant. Integer multiplication by immediate constant.
Polymorphic over all scalar integer types. Polymorphic over all scalar integer types.
""", """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
udiv_imm = Instruction('udiv_imm', """ udiv_imm = Instruction(
'udiv_imm', """
Unsigned integer division by an immediate constant. Unsigned integer division by an immediate constant.
This instruction never traps because a divisor of zero is not allowed. This instruction never traps because a divisor of zero is not allowed.
""", """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
sdiv_imm = Instruction('sdiv_imm', """ sdiv_imm = Instruction(
'sdiv_imm', """
Signed integer division by an immediate constant. Signed integer division by an immediate constant.
This instruction never traps because a divisor of -1 or 0 is not allowed. This instruction never traps because a divisor of -1 or 0 is not
""", allowed. """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
urem_imm = Instruction('urem_imm', """ urem_imm = Instruction(
'urem_imm', """
Unsigned integer remainder with immediate divisor. Unsigned integer remainder with immediate divisor.
This instruction never traps because a divisor of zero is not allowed. This instruction never traps because a divisor of zero is not allowed.
""", """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
srem_imm = Instruction('srem_imm', """ srem_imm = Instruction(
'srem_imm', """
Signed integer remainder with immediate divisor. Signed integer remainder with immediate divisor.
This instruction never traps because a divisor of 0 or -1 is not allowed. This instruction never traps because a divisor of 0 or -1 is not
""", allowed. """,
ins=(x, Y), outs=a) ins=(x, Y), outs=a)
# Swap x and y for isub_imm. # Swap x and y for isub_imm.
X = Operand('X', imm64) X = Operand('X', imm64)
y = Operand('y', iB) y = Operand('y', iB)
isub_imm = Instruction('isub_imm', """ isub_imm = Instruction(
'isub_imm', """
Immediate wrapping subtraction: :math:`a := X - y \pmod{2^B}`. Immediate wrapping subtraction: :math:`a := X - y \pmod{2^B}`.
Also works as integer negation when :math:`X = 0`. Use :inst:`iadd_imm` with a Also works as integer negation when :math:`X = 0`. Use :inst:`iadd_imm`
negative immediate operand for the reverse immediate subtraction. with a negative immediate operand for the reverse immediate
subtraction.
Polymorphic over all scalar integer types, but does not support vector Polymorphic over all scalar integer types, but does not support vector
types. types.
@@ -202,22 +222,26 @@ x = Operand('x', bits)
y = Operand('y', bits) y = Operand('y', bits)
a = Operand('a', bits) a = Operand('a', bits)
band = Instruction('band', """ band = Instruction(
'band', """
Bitwise and. Bitwise and.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
bor = Instruction('bor', """ bor = Instruction(
'bor', """
Bitwise or. Bitwise or.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
bxor = Instruction('bxor', """ bxor = Instruction(
'bxor', """
Bitwise xor. Bitwise xor.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
bnot = Instruction('bnot', """ bnot = Instruction(
'bnot', """
Bitwise not. Bitwise not.
""", """,
ins=x, outs=a) ins=x, outs=a)
@@ -227,21 +251,24 @@ x = Operand('x', Int, doc='Scalar or vector value to shift')
y = Operand('y', iB, doc='Number of bits to shift') y = Operand('y', iB, doc='Number of bits to shift')
a = Operand('a', Int) a = Operand('a', Int)
rotl = Instruction('rotl', r""" rotl = Instruction(
'rotl', r"""
Rotate left. Rotate left.
Rotate the bits in ``x`` by ``y`` places. Rotate the bits in ``x`` by ``y`` places.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
rotr = Instruction('rotr', r""" rotr = Instruction(
'rotr', r"""
Rotate right. Rotate right.
Rotate the bits in ``x`` by ``y`` places. Rotate the bits in ``x`` by ``y`` places.
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
ishl = Instruction('ishl', r""" ishl = Instruction(
'ishl', r"""
Integer shift left. Shift the bits in ``x`` towards the MSB by ``y`` Integer shift left. Shift the bits in ``x`` towards the MSB by ``y``
places. Shift in zero bits to the LSB. places. Shift in zero bits to the LSB.
@@ -257,9 +284,11 @@ ishl = Instruction('ishl', r"""
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
ushr = Instruction('ushr', r""" ushr = Instruction(
Unsigned shift right. Shift bits in ``x`` towards the LSB by ``y`` places, 'ushr', r"""
shifting in zero bits to the MSB. Also called a *logical shift*. Unsigned shift right. Shift bits in ``x`` towards the LSB by ``y``
places, shifting in zero bits to the MSB. Also called a *logical
shift*.
The shift amount is masked to the size of the register. The shift amount is masked to the size of the register.
@@ -273,9 +302,11 @@ ushr = Instruction('ushr', r"""
""", """,
ins=(x, y), outs=a) ins=(x, y), outs=a)
sshr = Instruction('sshr', r""" sshr = Instruction(
Signed shift right. Shift bits in ``x`` towards the LSB by ``y`` places, 'sshr', r"""
shifting in sign bits to the MSB. Also called an *arithmetic shift*. Signed shift right. Shift bits in ``x`` towards the LSB by ``y``
places, shifting in sign bits to the MSB. Also called an *arithmetic
shift*.
The shift amount is masked to the size of the register. The shift amount is masked to the size of the register.
@@ -290,34 +321,38 @@ sshr = Instruction('sshr', r"""
x = Operand('x', iB) x = Operand('x', iB)
a = Operand('a', i8) a = Operand('a', i8)
clz = Instruction('clz', r""" clz = Instruction(
'clz', r"""
Count leading zero bits. Count leading zero bits.
Starting from the MSB in ``x``, count the number of zero bits before Starting from the MSB in ``x``, count the number of zero bits before
reaching the first one bit. When ``x`` is zero, returns the size of x in reaching the first one bit. When ``x`` is zero, returns the size of x
bits. in bits.
""", """,
ins=x, outs=a) ins=x, outs=a)
cls = Instruction('cls', r""" cls = Instruction(
'cls', r"""
Count leading sign bits. Count leading sign bits.
Starting from the MSB after the sign bit in ``x``, count the number of Starting from the MSB after the sign bit in ``x``, count the number of
consecutive bits identical to the sign bit. When ``x`` is 0 or -1, returns consecutive bits identical to the sign bit. When ``x`` is 0 or -1,
one less than the size of x in bits. returns one less than the size of x in bits.
""", """,
ins=x, outs=a) ins=x, outs=a)
ctz = Instruction('ctz', r""" ctz = Instruction(
'ctz', r"""
Count trailing zeros. Count trailing zeros.
Starting from the LSB in ``x``, count the number of zero bits before Starting from the LSB in ``x``, count the number of zero bits before
reaching the first one bit. When ``x`` is zero, returns the size of x in reaching the first one bit. When ``x`` is zero, returns the size of x
bits. in bits.
""", """,
ins=x, outs=a) ins=x, outs=a)
popcnt = Instruction('popcnt', r""" popcnt = Instruction(
'popcnt', r"""
Population count Population count
Count the number of one bits in ``x``. Count the number of one bits in ``x``.

23
meta/cretonne/types.py
View File

@@ -5,7 +5,8 @@ The cretonne.types module predefines all the Cretonne scalar types.
from . import ScalarType, IntType, FloatType, BoolType from . import ScalarType, IntType, FloatType, BoolType
#: Boolean. #: Boolean.
b1 = ScalarType('b1', 0, b1 = ScalarType(
'b1', 0,
""" """
A boolean value that is either true or false. A boolean value that is either true or false.
""") """)
@@ -21,17 +22,17 @@ i32 = IntType(32) #: 32-bit int.
i64 = IntType(64) #: 64-bit int. i64 = IntType(64) #: 64-bit int.
#: IEEE single precision. #: IEEE single precision.
f32 = FloatType(32, f32 = FloatType(
""" 32, """
A 32-bit floating point type represented in the IEEE 754-2008 *binary32* A 32-bit floating point type represented in the IEEE 754-2008
interchange format. This corresponds to the :c:type:`float` type in most *binary32* interchange format. This corresponds to the :c:type:`float`
C implementations. type in most C implementations.
""") """)
#: IEEE double precision. #: IEEE double precision.
f64 = FloatType(64, f64 = FloatType(
""" 64, """
A 64-bit floating point type represented in the IEEE 754-2008 *binary64* A 64-bit floating point type represented in the IEEE 754-2008
interchange format. This corresponds to the :c:type:`double` type in *binary64* interchange format. This corresponds to the :c:type:`double`
most C implementations. type in most C implementations.
""") """)

10
meta/gen_instr.py
View File

@@ -5,6 +5,7 @@ Generate sources with instruction info.
import srcgen import srcgen
import constant_hash import constant_hash
def collect_instr_groups(targets): def collect_instr_groups(targets):
seen = set() seen = set()
groups = [] groups = []
@@ -15,6 +16,7 @@ def collect_instr_groups(targets):
seen.add(g) seen.add(g)
return groups return groups
def gen_opcodes(groups, out_dir): def gen_opcodes(groups, out_dir):
"""Generate opcode enumerations.""" """Generate opcode enumerations."""
fmt = srcgen.Formatter() fmt = srcgen.Formatter()
@@ -46,9 +48,12 @@ def gen_opcodes(groups, out_dir):
fmt.format('Opcode::{} => "{}",', i.camel_name, i.name) fmt.format('Opcode::{} => "{}",', i.camel_name, i.name)
# Generate an opcode hash table for looking up opcodes by name. # Generate an opcode hash table for looking up opcodes by name.
hash_table = constant_hash.compute_quadratic(instrs, hash_table = constant_hash.compute_quadratic(
instrs,
lambda i: constant_hash.simple_hash(i.name)) lambda i: constant_hash.simple_hash(i.name))
with fmt.indented('const OPCODE_HASH_TABLE: [Opcode; {}] = ['.format(len(hash_table)), '];'): with fmt.indented(
'const OPCODE_HASH_TABLE: [Opcode; {}] = ['
.format(len(hash_table)), '];'):
for i in hash_table: for i in hash_table:
if i is None: if i is None:
fmt.line('Opcode::NotAnOpcode,') fmt.line('Opcode::NotAnOpcode,')
@@ -57,6 +62,7 @@ def gen_opcodes(groups, out_dir):
fmt.update_file('opcodes.rs', out_dir) fmt.update_file('opcodes.rs', out_dir)
def generate(targets, out_dir): def generate(targets, out_dir):
groups = collect_instr_groups(targets) groups = collect_instr_groups(targets)
gen_opcodes(groups, out_dir) gen_opcodes(groups, out_dir)

3
meta/srcgen.py
View File

@@ -9,6 +9,7 @@ source code.
import sys import sys
import os import os
class Formatter(object): class Formatter(object):
""" """
Source code formatter class. Source code formatter class.
@@ -70,7 +71,7 @@ class Formatter(object):
self.after = after self.after = after
def __enter__(self): def __enter__(self):
self.fmt.indent_push(); self.fmt.indent_push()
def __exit__(self, t, v, tb): def __exit__(self, t, v, tb):
self.fmt.indent_pop() self.fmt.indent_pop()

1
meta/target/__init__.py
View File

@@ -8,6 +8,7 @@ set architecture supported by Cretonne.
from . import riscv from . import riscv
def all_targets(): def all_targets():
""" """
Get a list of all the supported targets. Each target is represented as a Get a list of all the supported targets. Each target is represented as a

7
meta/target/riscv/__init__.py
View File

@@ -2,9 +2,10 @@
RISC-V Target RISC-V Target
------------- -------------
`RISC-V <http://riscv.org/>`_ is an open instruction set architecture originally `RISC-V <http://riscv.org/>`_ is an open instruction set architecture
developed at UC Berkeley. It is a RISC-style ISA with either a 32-bit (RV32I) or originally developed at UC Berkeley. It is a RISC-style ISA with either a
64-bit (RV32I) base instruction set and a number of optional extensions: 32-bit (RV32I) or 64-bit (RV32I) base instruction set and a number of optional
extensions:
RV32M / RV64M RV32M / RV64M
Integer multiplication and division. Integer multiplication and division.