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add asserts for sin shape

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This commit is contained in:
Alexander Ploshkin 2022-12-17 13:34:57 +04:00
parent c7c66976cc
commit ee8984d2be
1 changed files with 2 additions and 0 deletions
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2
flash_attn/layers/rotary.py
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@ -43,6 +43,7 @@ class ApplyRotaryEmb(torch.autograd.Function):
rotary_dim *= 2
assert rotary_dim <= headdim
assert seqlen <= rotary_seqlen
assert sin.shape == (rotary_seqlen, rotary_dim // 2)
x1, x2 = x[..., :rotary_dim].chunk(2, dim=-1)
out = torch.empty_like(x) if not inplace else x
o1, o2 = out[..., :rotary_dim].chunk(2, dim=-1) if not inplace else (x1, x2)
@ -90,6 +91,7 @@ class ApplyRotaryEmbQKV_(torch.autograd.Function):
rotary_dim *= 2
assert rotary_dim <= headdim
assert seqlen <= rotary_seqlen
assert sin.shape == (rotary_seqlen, rotary_dim // 2)
q1, q2 = qkv[:, :, 0, :, :rotary_dim].chunk(2, dim=-1)
rotary_emb.apply_rotary(q1, q2, rearrange(cos[:seqlen], 's d -> s 1 d'),
rearrange(sin[:seqlen], 's d -> s 1 d'), q1, q2, False)