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[Operator Mechanism] Fix baddbmm_grad input_grad overflow for large tensors #79455

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[Operator Mechanism] Fix baddbmm_grad input_grad overflow for large tensors #79455

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4de9e57
Fix baddbmm_grad input_grad overflow for large tensors
feixi139 Jul 10, 2026
757e4fe
fix bugs
feixi139 Jul 10, 2026
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23 changes: 6 additions & 17 deletions paddle/phi/kernels/impl/baddbmm_grad_kernel_impl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -180,28 +180,17 @@ void BaddbmmGradKernel(const Context& dev_ctx,
.reshape(eigen_dinput_shape)
.template cast<T>();
}
} else {
// The VCOPY does not support the float16, bfloat16
if (!is_float16_or_bfloat16) {
mt_blas.VCOPY(
total_elems, out_grad.data<MPType>(), input_grad->data<MPType>());
} else {
funcs::ForRange<Context> for_range(dev_ctx, total_elems);
BCopyOrScaleFunctor<T> functor(
1, out_grad.data<T>(), input_grad->data<T>(), total_elems);
for_range(functor);
}
}

// The SCAL does not support the float16, bfloat16
if (!is_float16_or_bfloat16) {
mt_blas.SCAL(total_elems, beta, input_grad->data<MPType>());
} else {
funcs::ForRange<Context> for_range(dev_ctx, total_elems);
BCopyOrScaleFunctor<T> functor(
beta, input_grad->data<T>(), input_grad->data<T>(), total_elems);
1, out_grad.data<T>(), input_grad->data<T>(), total_elems);
for_range(functor);
}
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funcs::ForRange<Context> for_range(dev_ctx, total_elems);
BCopyOrScaleFunctor<T> functor(
beta, input_grad->data<T>(), input_grad->data<T>(), total_elems);
for_range(functor);
}
if (x_grad) {
dev_ctx.template Alloc<T>(x_grad);
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