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target/riscv/insn_trans/trans_rvv.c.inc: use 'vlenb' in MAXSZ()

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Calculate the maximum vector size possible, 'max_sz', which is the size
in bytes 'vlenb' multiplied by the max value of LMUL (LMUL = 8, when
s->lmul = 3).

'max_sz' is then shifted right by 'scale', expressed as '3 - s->lmul',
which is clearer than doing 'scale = lmul - 3' and then using '-scale'
in the shift right.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240122161107.26737-10-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Daniel Henrique Barboza 2024-01-22 13:11:03 -03:00 • committed by Alistair Francis
parent 7aa4d519cb
commit bd2c82283d
1 changed files with 3 additions and 3 deletions
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6
target/riscv/insn_trans/trans_rvv.c.inc
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@ -1160,12 +1160,12 @@ GEN_LDST_WHOLE_TRANS(vs8r_v, 8, 1, true)
/* /*
* MAXSZ returns the maximum vector size can be operated in bytes, * MAXSZ returns the maximum vector size can be operated in bytes,
* which is used in GVEC IR when vl_eq_vlmax flag is set to true * which is used in GVEC IR when vl_eq_vlmax flag is set to true
* to accerlate vector operation. * to accelerate vector operation.
*/ */
static inline uint32_t MAXSZ(DisasContext *s) static inline uint32_t MAXSZ(DisasContext *s)
{ {
int scale = s->lmul - 3; int max_sz = s->cfg_ptr->vlenb * 8;
return s->cfg_ptr->vlen >> -scale; return max_sz >> (3 - s->lmul);
} }
static bool opivv_check(DisasContext *s, arg_rmrr *a) static bool opivv_check(DisasContext *s, arg_rmrr *a)