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That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-Mailman-Approved-At: Fri, 10 Jul 2020 08:57:17 -0400 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sagar Karandikar , Frank Chang , Bastian Koppelmann , Alistair Francis , Palmer Dabbelt , LIU Zhiwei Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: LIU Zhiwei Signed-off-by: LIU Zhiwei Signed-off-by: Frank Chang --- target/riscv/cpu_bits.h | 7 +++++++ target/riscv/csr.c | 21 +++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h index 8117e8b5a7..202440e5eb 100644 --- a/target/riscv/cpu_bits.h +++ b/target/riscv/cpu_bits.h @@ -60,9 +60,16 @@ #define CSR_VSTART 0x008 #define CSR_VXSAT 0x009 #define CSR_VXRM 0x00a +#define CSR_VCSR 0x00f #define CSR_VL 0xc20 #define CSR_VTYPE 0xc21 =20 +/* VCSR fields */ +#define VCSR_VXSAT_SHIFT 0 +#define VCSR_VXSAT (0x1 << VCSR_VXSAT_SHIFT) +#define VCSR_VXRM_SHIFT 1 +#define VCSR_VXRM (0x3 << VCSR_VXRM_SHIFT) + /* User Timers and Counters */ #define CSR_CYCLE 0xc00 #define CSR_TIME 0xc01 diff --git a/target/riscv/csr.c b/target/riscv/csr.c index ac01c835e1..34ce509e64 100644 --- a/target/riscv/csr.c +++ b/target/riscv/csr.c @@ -238,6 +238,26 @@ static int write_vstart(CPURISCVState *env, int csrno,= target_ulong val) return 0; } =20 +static int read_vcsr(CPURISCVState *env, int csrno, target_ulong *val) +{ + *val =3D (env->vxrm << VCSR_VXRM_SHIFT) | (env->vxsat << VCSR_VXSAT_SH= IFT); + return 0; +} + +static int write_vcsr(CPURISCVState *env, int csrno, target_ulong val) +{ +#if !defined(CONFIG_USER_ONLY) + if (!env->debugger && !riscv_cpu_vector_enabled(env)) { + return -1; + } + env->mstatus |=3D MSTATUS_VS; +#endif + + env->vxrm =3D (val & VCSR_VXRM) >> VCSR_VXRM_SHIFT; + env->vxsat =3D (val & VCSR_VXSAT) >> VCSR_VXSAT_SHIFT; + return 0; +} + /* User Timers and Counters */ static int read_instret(CPURISCVState *env, int csrno, target_ulong *val) { @@ -1255,6 +1275,7 @@ static riscv_csr_operations csr_ops[CSR_TABLE_SIZE] = =3D { [CSR_VSTART] =3D { vs, read_vstart, write_vstart = }, [CSR_VXSAT] =3D { vs, read_vxsat, write_vxsat = }, [CSR_VXRM] =3D { vs, read_vxrm, write_vxrm = }, + [CSR_VCSR] =3D { vs, read_vcsr, write_vcsr = }, [CSR_VL] =3D { vs, read_vl = }, [CSR_VTYPE] =3D { vs, read_vtype = }, /* User Timers and Counters */ --=20 2.17.1