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X-Received-From: 2607:f8b0:400e:c01::244 Subject: [Qemu-devel] [PATCH v1 2/2] RISC-V: Fix incorrect disassembly for addiw 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 , Sagar Karandikar , Bastian Koppelmann , Palmer Dabbelt , Michael Clark , patches@groups.riscv.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_6 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This fixes a bug in the disassembler constraints used to lift instructions into pseudo-instructions, whereby addiw instructions are always lifted to sext.w instead of just lifting addiw with a zero immediate. An associated fix has been made to the metadata used to machine generate the disseasembler: https://github.com/michaeljclark/riscv-meta/ commit/4a6b2f3898430768acfe201405224d2ea31e1477 Cc: Sagar Karandikar Cc: Bastian Koppelmann Cc: Palmer Dabbelt Cc: Peter Maydell Signed-off-by: Michael Clark Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson --- disas/riscv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/disas/riscv.c b/disas/riscv.c index 3c17501..74ad16e 100644 --- a/disas/riscv.c +++ b/disas/riscv.c @@ -600,7 +600,7 @@ static const rvc_constraint rvcc_mv[] =3D { rvc_imm_eq_= zero, rvc_end }; static const rvc_constraint rvcc_not[] =3D { rvc_imm_eq_n1, rvc_end }; static const rvc_constraint rvcc_neg[] =3D { rvc_rs1_eq_x0, rvc_end }; static const rvc_constraint rvcc_negw[] =3D { rvc_rs1_eq_x0, rvc_end }; -static const rvc_constraint rvcc_sext_w[] =3D { rvc_rs2_eq_x0, rvc_end }; +static const rvc_constraint rvcc_sext_w[] =3D { rvc_imm_eq_zero, rvc_end }; static const rvc_constraint rvcc_seqz[] =3D { rvc_imm_eq_p1, rvc_end }; static const rvc_constraint rvcc_snez[] =3D { rvc_rs1_eq_x0, rvc_end }; static const rvc_constraint rvcc_sltz[] =3D { rvc_rs2_eq_x0, rvc_end }; --=20 2.7.0