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Fix illegal memory access of compute_grad_kernel #64

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Apr 23, 2020
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Fix illegal memory access of compute_grad_kernel #64

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2 changes: 1 addition & 1 deletion include/detail/gpu_rnnt_kernel.h
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Original file line number Diff line number Diff line change
Expand Up @@ -168,7 +168,7 @@ __global__ void compute_grad_kernel(Tp* grads, const Tp* const acts, const Tp* c
if (idx == blank_ && t < T-1) {
grad -= exp(alphas[col] + logpk - logll[mb] + betas[col + maxU]);
}
if (idx == labels[u] && u < U-1) {
if (u < U-1 && idx == labels[u]) {
grad -= exp(alphas[col] + logpk - logll[mb] + betas[col+1]);
}
grads[col * alphabet_size + idx] = grad;
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