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tcg: Document INDEX_mul[us]h_*

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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Richard Henderson 2018-04-17 07:18:01 -10:00
parent 26bd8d98c4
commit d103021269
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tcg/README
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@ -431,6 +431,14 @@ double-word product T0. The later is returned in two single-word outputs.
Similar to mulu2, except the two inputs T1 and T2 are signed.
* mulsh_i32/i64 t0, t1, t2
* muluh_i32/i64 t0, t1, t2
Provide the high part of a signed or unsigned multiply, respectively.
If mulu2/muls2 are not provided by the backend, the tcg-op generator
can obtain the same results can be obtained by emitting a pair of
opcodes, mul+muluh/mulsh.
********* Memory Barrier support
* mb <$arg>