diff options
| author | Daniel Henrique Barboza <dbarboza@ventanamicro.com> | 2024-01-22 13:11:04 -0300 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2024-02-09 20:43:14 +1000 |
| commit | 24a6aeecfe2721f953bb3d8ebca71ec7688041b7 (patch) | |
| tree | 86edae249cb7762bb03bcc5b4c915b28aecde203 /target | |
| parent | bd2c82283d21e3400d7d89676a221935904c2fe6 (diff) | |
target/riscv/cpu.h: use 'vlenb' in vext_get_vlmax()
Rename the existing 'sew' variable to 'vsew' for extra clarity.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240122161107.26737-11-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/riscv/cpu.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index 20997b0886..1c5a363e4b 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -690,9 +690,16 @@ static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env) */ static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype) { - uint8_t sew = FIELD_EX64(vtype, VTYPE, VSEW); + uint8_t vsew = FIELD_EX64(vtype, VTYPE, VSEW); int8_t lmul = sextract32(FIELD_EX64(vtype, VTYPE, VLMUL), 0, 3); - return cpu->cfg.vlen >> (sew + 3 - lmul); + uint32_t vlen = cpu->cfg.vlenb << 3; + + /* + * We need to use 'vlen' instead of 'vlenb' to + * preserve the '+ 3' in the formula. Otherwise + * we risk a negative shift if vsew < lmul. + */ + return vlen >> (vsew + 3 - lmul); } void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc, |