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target/riscv/cpu.h: use 'vlenb' in vext_get_vlmax()

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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>
This commit is contained in:
Daniel Henrique Barboza 2024-01-22 13:11:04 -03:00 committed by Alistair Francis
parent bd2c82283d
commit 24a6aeecfe
1 changed files with 9 additions and 2 deletions
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11
target/riscv/cpu.h
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@ -690,9 +690,16 @@ static inline RISCVMXL riscv_cpu_sxl(CPURISCVState *env)
*/ */
static inline uint32_t vext_get_vlmax(RISCVCPU *cpu, target_ulong vtype) 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); 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, void cpu_get_tb_cpu_state(CPURISCVState *env, vaddr *pc,