def extract_model(tree, arch, skip_mem=True):
try:
isa = MachineModel.get_isa_for_arch(arch)
except Exception:
print("Skipping...", file=sys.stderr)
return None
mm = MachineModel(isa=isa)
parser = get_parser(isa)
for instruction_tag in tree.findall('.//instruction'):
ignore = False
mnemonic = instruction_tag.attrib['asm']
iform = instruction_tag.attrib['iform']
# skip any mnemonic which contain spaces (e.g., "REX CRC32")
if ' ' in mnemonic:
continue
# Extract parameter components
try:
parameters = extract_paramters(instruction_tag, parser, isa)
if isa == 'x86':
parameters.reverse()
except ValueError as e:
print(e, file=sys.stderr)
# Extract port occupation, throughput and latency
port_pressure, throughput, latency, uops = [], None, None, None
arch_tag = instruction_tag.find('architecture[@name="' + arch.upper() + '"]')
if arch_tag is None:
continue
# skip any instructions without port utilization
if not any(['ports' in x.attrib for x in arch_tag.findall('measurement')]):
print("Couldn't find port utilization, skip: ", iform, file=sys.stderr)
continue
# skip if computed and measured TP don't match
if not [x.attrib['TP_ports'] == x.attrib['TP'] for x in arch_tag.findall('measurement')][
0
]:
print(
"Calculated TP from port utilization doesn't match TP, skip: ",
iform,
file=sys.stderr,
)
continue
# skip if instruction contains memory operand
if skip_mem and any(
[x.attrib['type'] == 'mem' for x in instruction_tag.findall('operand')]
):
print("Contains memory operand, skip: ", iform, file=sys.stderr)
continue
# We collect all measurement and IACA information and compare them later
for measurement_tag in arch_tag.iter('measurement'):
if 'TP_ports' in measurement_tag.attrib:
throughput = measurement_tag.attrib['TP_ports']
else:
throughput = (
measurement_tag.attrib['TP'] if 'TP' in measurement_tag.attrib else None
)
uops = (
int(measurement_tag.attrib['uops']) if 'uops' in measurement_tag.attrib else None
)
if 'ports' in measurement_tag.attrib:
port_pressure.append(port_pressure_from_tag_attributes(measurement_tag.attrib))
latencies = [
int(l_tag.attrib['cycles'])
for l_tag in measurement_tag.iter('latency')
if 'cycles' in l_tag.attrib
]
if len(latencies) == 0:
latencies = [
int(l_tag.attrib['max_cycles'])
for l_tag in measurement_tag.iter('latency')
if 'max_cycles' in l_tag.attrib
]
if latencies[1:] != latencies[:-1]:
print(
"Contradicting latencies found, using smallest:",
iform,
latencies,
file=sys.stderr,
)
if latencies:
latency = min(latencies)
if ignore:
continue
# Ordered by IACA version (newest last)
for iaca_tag in sorted(
arch_tag.iter('IACA'), key=lambda i: StrictVersion(i.attrib['version'])
):
if 'ports' in iaca_tag.attrib:
port_pressure.append(port_pressure_from_tag_attributes(iaca_tag.attrib))
# Check if all are equal
if port_pressure:
if port_pressure[1:] != port_pressure[:-1]:
print("Contradicting port occupancies, using latest IACA:", iform, file=sys.stderr)
port_pressure = port_pressure[-1]
else:
# print("No data available for this architecture:", mnemonic, file=sys.stderr)
continue
# Adding Intel's 2D and 3D pipelines on Intel µarchs, without Ice Lake:
if arch.upper() in intel_archs and not arch.upper() in ['ICL']:
if any([p['class'] == 'memory' for p in parameters]):
# We have a memory parameter, if ports 2 & 3 are present, also add 2D & 3D
# TODO remove port7 on 'hsw' onward and split entries depending on addressing mode
port_23 = False
port_4 = False
for i, pp in enumerate(port_pressure):
if '2' in pp[1] and '3' in pp[1]:
port_23 = True
if '4' in pp[1]:
port_4 = True
# Add (X, ['2D', '3D']) if load ports (2 & 3) are used, but not the store port (4)
# X = 2 on SNB and IVB IFF used in combination with ymm register, otherwise X = 1
if arch.upper() in ['SNB', 'IVB'] and \
any([p['class'] == 'register' and p['name'] == 'ymm' for p in parameters]):
data_port_throughput = 2
else:
data_port_throughput = 1
if port_23 and not port_4:
port_pressure.append((data_port_throughput, ['2D', '3D']))
# Add missing ports:
for ports in [pp[1] for pp in port_pressure]:
for p in ports:
mm.add_port(p)
throughput = max(mm.average_port_pressure(port_pressure))
mm.set_instruction(mnemonic, parameters, latency, port_pressure, throughput, uops)
# TODO eliminate entries which could be covered by automatic load / store expansion
return mm
def extract_model(tree, arch, skip_mem=True):
try:
isa = MachineModel.get_isa_for_arch(arch)
except Exception:
print("Skipping...", file=sys.stderr)
return None
mm = MachineModel(isa=isa)
parser = get_parser(isa)
for instruction_tag in tree.findall(".//instruction"):
ignore = False
mnemonic = instruction_tag.attrib["asm"]
iform = instruction_tag.attrib["iform"]
# reduce to second part if mnemonic contain space (e.g., "REX CRC32")
if " " in mnemonic:
mnemonic = mnemonic.split(" ", 1)[1]
# Extract parameter components
try:
parameters = extract_paramters(instruction_tag, parser, isa)
if isa == "x86":
parameters.reverse()
except ValueError as e:
print(e, file=sys.stderr)
# Extract port occupation, throughput and latency
port_pressure, throughput, latency, uops = [], None, None, None
arch_tag = instruction_tag.find('architecture[@name="' + arch.upper() + '"]')
if arch_tag is None:
continue
# skip any instructions without port utilization
if not any(["ports" in x.attrib for x in arch_tag.findall("measurement")]):
print("Couldn't find port utilization, skip: ", iform, file=sys.stderr)
continue
# skip if measured TP is smaller than computed
if [float(x.attrib["TP_ports"]) > min(float(x.attrib["TP_loop"]),
float(x.attrib["TP_unrolled"]))
for x in arch_tag.findall("measurement")][0]:
print(
"Calculated TP is greater than measured TP.",
iform,
file=sys.stderr,
)
# skip if instruction contains memory operand
if skip_mem and any(
[x.attrib["type"] == "mem" for x in instruction_tag.findall("operand")]
):
print("Contains memory operand, skip: ", iform, file=sys.stderr)
continue
# We collect all measurement and IACA information and compare them later
for measurement_tag in arch_tag.iter("measurement"):
if "TP_ports" in measurement_tag.attrib:
throughput = float(measurement_tag.attrib["TP_ports"])
else:
throughput = min(
measurement_tag.attrib.get("TP_loop", float('inf')),
measurement_tag.attrib.get("TP_unroll", float('inf')),
measurement_tag.attrib.get("TP", float('inf')),
)
if throughput == float('inf'):
throughput = None
uops = int(measurement_tag.attrib["uops"]) if "uops" in measurement_tag.attrib else None
if "ports" in measurement_tag.attrib:
port_pressure.append(port_pressure_from_tag_attributes(measurement_tag.attrib))
latencies = [
int(l_tag.attrib["cycles"])
for l_tag in measurement_tag.iter("latency")
if "cycles" in l_tag.attrib
]
if len(latencies) == 0:
latencies = [
int(l_tag.attrib["max_cycles"])
for l_tag in measurement_tag.iter("latency")
if "max_cycles" in l_tag.attrib
]
if latencies[1:] != latencies[:-1]:
print(
"Contradicting latencies found, using smallest:",
iform,
latencies,
file=sys.stderr,
)
if latencies:
latency = min(latencies)
if ignore:
continue
# Ordered by IACA version (newest last)
for iaca_tag in sorted(
arch_tag.iter("IACA"), key=lambda i: StrictVersion(i.attrib["version"])
):
if "ports" in iaca_tag.attrib:
port_pressure.append(port_pressure_from_tag_attributes(iaca_tag.attrib))
# Check if all are equal
if port_pressure:
if port_pressure[1:] != port_pressure[:-1]:
print("Contradicting port occupancies, using latest IACA:", iform, file=sys.stderr)
port_pressure = port_pressure[-1]
else:
# print("No data available for this architecture:", mnemonic, file=sys.stderr)
continue
# Adding Intel's 2D and 3D pipelines on Intel µarchs, without Ice Lake:
if arch.upper() in intel_archs and not arch.upper() in ["ICL"]:
if any([p["class"] == "memory" for p in parameters]):
# We have a memory parameter, if ports 2 & 3 are present, also add 2D & 3D
# TODO remove port7 on 'hsw' onward and split entries depending on addressing mode
port_23 = False
port_4 = False
for i, pp in enumerate(port_pressure):
if "2" in pp[1] and "3" in pp[1]:
port_23 = True
if "4" in pp[1]:
port_4 = True
# Add (x, ['2D', '3D']) if load ports (2 & 3) are used, but not the store port (4)
if port_23 and not port_4:
if arch.upper() in ["SNB", "IVB"] and any(
[p.get('name', '') == 'ymm' for p in parameters]) and \
not '128' in mnemonic:
# x = 2 if SNB or IVB and ymm regiser in any operand and not '128' in
# instruction name
port2D3D_pressure = 2
else:
# otherwiese x = 1
port2D3D_pressure = 1
port_pressure.append((port2D3D_pressure, ["2D", "3D"]))
# Add missing ports:
for ports in [pp[1] for pp in port_pressure]:
for p in ports:
mm.add_port(p)
throughput = max(mm.average_port_pressure(port_pressure))
mm.set_instruction(mnemonic, parameters, latency, port_pressure, throughput, uops)
# TODO eliminate entries which could be covered by automatic load / store expansion
return mm
