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Thu, 25 Jul 2024 16:46:41 -0700 (PDT) From: Deepak Gupta To: qemu-riscv@nongnu.org, qemu-devel@nongnu.org, jim.shu@sifive.com, andy.chiu@sifive.com, jesse.huang@sifive.com, kito.cheng@sifive.com Cc: palmer@dabbelt.com, Alistair.Francis@wdc.com, laurent@vivier.eu, bmeng.cn@gmail.com, liwei1518@gmail.com, dbarboza@ventanamicro.com, zhiwei_liu@linux.alibaba.com, Deepak Gupta Subject: [PATCH 14/24] target/riscv: compressed encodings for sspush and sspopchk Date: Thu, 25 Jul 2024 16:46:03 -0700 Message-ID: <20240725234614.3850142-15-debug@rivosinc.com> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240725234614.3850142-1-debug@rivosinc.com> References: <20240725234614.3850142-1-debug@rivosinc.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::129; envelope-from=debug@rivosinc.com; helo=mail-il1-x129.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @rivosinc-com.20230601.gappssmtp.com) X-ZM-MESSAGEID: 1721951362485116600 Content-Type: text/plain; charset="utf-8" sspush/sspopchk have compressed encodings carved out of zcmops. compressed sspush is designated as c.mop.1 while compressed sspopchk is designated as c.mop.5. Note that c.sspush x1 exists while c.sspush x5 doesn't. Similarly c.sspopchk x5 exists while c.sspopchk x1 doesn't. Signed-off-by: Deepak Gupta Co-developed-by: Jim Shu Co-developed-by: Andy Chiu --- target/riscv/insn16.decode | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/target/riscv/insn16.decode b/target/riscv/insn16.decode index 3953bcf82d..d9fb74fef6 100644 --- a/target/riscv/insn16.decode +++ b/target/riscv/insn16.decode @@ -69,10 +69,12 @@ # Formats 16: @cr .... ..... ..... .. &r rs2=3D%rs2_5 rs1=3D%rd = %rd @ci ... . ..... ..... .. &i imm=3D%imm_ci rs1=3D%rd = %rd +@c_sspop ... . ..... ..... .. &i imm=3D0 rs1=3D5 rd=3D0 @cl_q ... . ..... ..... .. &i imm=3D%uimm_cl_q rs1=3D%rs1_3 = rd=3D%rs2_3 @cl_d ... ... ... .. ... .. &i imm=3D%uimm_cl_d rs1=3D%rs1_3 = rd=3D%rs2_3 @cl_w ... ... ... .. ... .. &i imm=3D%uimm_cl_w rs1=3D%rs1_3 = rd=3D%rs2_3 @cs_2 ... ... ... .. ... .. &r rs2=3D%rs2_3 rs1=3D%rs1_3 = rd=3D%rs1_3 +@c_sspush ... ... ... .. ... .. &s imm=3D0 rs1=3D0 rs2=3D1 @cs_q ... ... ... .. ... .. &s imm=3D%uimm_cl_q rs1=3D%rs1_3 = rs2=3D%rs2_3 @cs_d ... ... ... .. ... .. &s imm=3D%uimm_cl_d rs1=3D%rs1_3 = rs2=3D%rs2_3 @cs_w ... ... ... .. ... .. &s imm=3D%uimm_cl_w rs1=3D%rs1_3 = rs2=3D%rs2_3 @@ -140,6 +142,8 @@ sw 110 ... ... .. ... 00 @cs_w addi 000 . ..... ..... 01 @ci addi 010 . ..... ..... 01 @c_li { + sspush 011 0 00001 00000 01 @c_sspush # c.sspush x1 carving o= ut of zcmops + sspopchk 011 0 00101 00000 01 @c_sspop # c.sspopchk x5 carving = out of zcmops c_mop_n 011 0 0 n:3 1 00000 01 illegal 011 0 ----- 00000 01 # c.addi16sp and c.lui, RES nzimm= =3D0 addi 011 . 00010 ..... 01 @c_addi16sp --=20 2.44.0