From d103021269ca9307ed7ca0d845d2b9e6c387509a Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 17 Apr 2018 07:18:01 -1000 Subject: tcg: Document INDEX_mul[us]h_* Signed-off-by: Richard Henderson --- tcg/README | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'tcg') diff --git a/tcg/README b/tcg/README index bb2ea5121b..a5237a9edb 100644 --- a/tcg/README +++ b/tcg/README @@ -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> -- cgit v1.2.1