Jiawei-Shao opened a new pull request, #16976:
URL: https://github.com/apache/tvm/pull/16976
This patch adds the support of `__dp4a(int8x4, int8x4)` as a pure extern
method of WebGPU target. In the generated WGSL shader, `int8x4` will be
translated into `u32`, and `__dp4a(int8x4, int8x4)` will be translated into the
WGSL built-in function `dot4I8Packed(u32, u32)`.
Here is an example to use `__dp4a` in WebGPU target:
```
n = te.var("n")
A = te.placeholder((n,), "int8x4", name="A")
B = te.placeholder((n,), "int8x4", name="B")
C = te.compute(A.shape, lambda i: tvm.tir.call_pure_extern("int32",
"__dp4a", A[i], B[i]), name="C")
s = te.create_schedule(C.op)
bx, tx = s[C].split(C.op.axis[0], factor=64)
s[C].bind(bx, te.thread_axis("blockIdx.x"))
s[C].bind(tx, te.thread_axis("threadIdx.x"))
mod = tvm.build(s, [A, B, C], tgt, name="dp4aTest")
```
Issue: #16627
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