mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-09 07:00:18 +02:00
Ryan Houdek
921867de7e
Some of the newer CPU cores in LLVM's source claim to be a Cortex-A73, which means they become limited to an ARMv8.0 feature set. This is what you get if you compile FEX with -mcpu=native To work around this issue, manually parse /proc/cpuinfo ourselves and pull out the CPU type to pass to clang directly. This also fixes the issue that we were using -march on AArch64, which no longer works on newer clang versions. We instead need to use mcpu or mtune. Should improve all atomic op performance outside of the JITs, where they were turning in to loadstore exclusive pairs.
69 lines
2.1 KiB
Python
69 lines
2.1 KiB
Python
#!/usr/bin/python3
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import re
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import sys
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import subprocess
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# Order this list from oldest to newest
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# try not to list something newer than our minimum compiler supported version
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BigCoreIDs = {
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# ARM
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tuple([0x41, 0xd07]): "cortex-a57",
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tuple([0x41, 0xd08]): "cortex-a72",
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tuple([0x41, 0xd09]): "cortex-a73",
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tuple([0x41, 0xd0a]): "cortex-a75",
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tuple([0x41, 0xd0b]): "cortex-a76",
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tuple([0x41, 0xd0d]): "cortex-a77",
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tuple([0x41, 0xd41]): "cortex-a78",
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tuple([0x41, 0xd44]): "cortex-x1",
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tuple([0x41, 0xd0c]): "neoverse-n1",
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tuple([0x41, 0xd49]): "neoverse-n2",
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## Nvidia
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tuple([0x4e, 0x004]): "carmel", # Carmel
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# Qualcomm
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tuple([0x51, 0x800]): "cortex-a73", # Kryo 2xx Gold
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tuple([0x51, 0x802]): "cortex-a75", # Kryo 3xx Gold
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tuple([0x51, 0x804]): "cortex-a76", # Kryo 4xx Gold
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}
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LittleCoreIDs = {
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# ARM
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tuple([0x41, 0xd04]): "cortex-a35",
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tuple([0x41, 0xd03]): "cortex-a53",
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tuple([0x41, 0xd05]): "cortex-a55",
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# Qualcomm
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tuple([0x51, 0x801]): "cortex-a53", # Kryo 2xx Silver
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tuple([0x51, 0x803]): "cortex-a55", # Kryo 3xx Silver
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tuple([0x51, 0x805]): "cortex-a55", # Kryo 4xx/5xx Silver
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}
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# Args: </proc/cpuinfo file>
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if (len(sys.argv) < 2):
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sys.exit()
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cpuinfo = []
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with open(sys.argv[1]) as cpuinfo_file:
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current_implementer = 0
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current_part = 0
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for line in cpuinfo_file:
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line = line.strip()
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if "CPU implementer" in line:
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current_implementer = int(re.findall(r'0x[0-9A-F]+', line, re.I)[0], 16)
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if "CPU part" in line:
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current_part = int(re.findall(r'0x[0-9A-F]+', line, re.I)[0], 16)
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cpuinfo += {tuple([current_implementer, current_part])}
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largest_big = "native"
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largest_little = "native"
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for core in cpuinfo:
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if BigCoreIDs.get(core):
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largest_big = BigCoreIDs.get(core)
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if LittleCoreIDs.get(core):
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largest_little = LittleCoreIDs.get(core)
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# We only want the big core output
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print(largest_big)
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# print(largest_little)
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