tests/python/codegen/test_target_codegen_x86.py

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import platform
import re

import pytest

import tvm
from tvm import te

llvm_version = tvm.target.codegen.llvm_version_major()
machine = platform.machine()

if machine not in ["i386", "x86_64", "AMD64", "amd64"]:
    pytest.skip(f"Requires x86_64/i386, but machine is {machine}", allow_module_level=True)


@tvm.testing.requires_llvm
@pytest.mark.skipif(llvm_version < 6, reason=f"Requires LLVM 6+, got {llvm_version}")
def test_fp16_to_fp32():
    def fp16_to_fp32(target, width, match=None, not_match=None):
        elements = 64
        n = tvm.runtime.convert(elements)
        A = te.placeholder((n, width), dtype="float16", name="A")
        B = te.compute(A.shape, lambda *i: A(*i).astype("float32"), name="B")
        sch = tvm.tir.Schedule(te.create_prim_func([A, B]))
        sch.vectorize(sch.get_loops("B")[1])
        f = tvm.tir.build(sch.mod, target=target)

        assembly = f.inspect_source("asm").splitlines()
        if match:
            matches = [l for l in assembly if re.search(match, l)]
            assert matches
        if not_match:
            not_matches = [l for l in assembly if re.search(not_match, l)]
            assert not not_matches

    fp16_to_fp32("llvm -mcpu=skylake-avx512", 15, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=skylake-avx512", 16, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=skylake-avx512", 17, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=skylake-avx512", 49, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=skylake-avx512 -mattr=-avx512f", 49, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=skylake-avx512 -mattr=-f16c,-avx512f", 49, not_match="vcvtph2ps")
    fp16_to_fp32("llvm -mcpu=core-avx2", 8, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm -mcpu=core-avx2", 9, match="vcvtph2ps.*mm")
    fp16_to_fp32("llvm", 9, not_match="vcvtph2ps")


is_32bit = platform.architecture()[0] == "32bit"


if __name__ == "__main__":
    test_fp16_to_fp32()