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[97.113.2.170]) by smtp.gmail.com with ESMTPSA id y2-v6sm18014596pgp.92.2018.05.02.10.47.55 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 02 May 2018 10:47:56 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Wed, 2 May 2018 10:47:49 -0700 Message-Id: <20180502174753.16133-2-richard.henderson@linaro.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180502174753.16133-1-richard.henderson@linaro.org> References: <20180502174753.16133-1-richard.henderson@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c00::243 Subject: [Qemu-devel] [PULL 1/5] tcg: Document INDEX_mul[us]h_* X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Richard Henderson --- tcg/README | 8 ++++++++ 1 file changed, 8 insertions(+) -- 2.14.3 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>