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target/riscv: rvv-1.0: take fractional LMUL into vector max elements calculation

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Update vext_get_vlmax() and MAXSZ() to take fractional LMUL into
calculation for RVV 1.0.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-27-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2021-12-10 15:56:12 +08:00 • committed by Alistair Francis
parent 5a9f8e1552
commit a689a82b7f
3 changed files with 42 additions and 13 deletions
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12
target/riscv/insn_trans/trans_rvv.c.inc
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@ -1049,7 +1049,17 @@ GEN_LDST_WHOLE_TRANS(vs8r_v, 8, true)
/*
*** Vector Integer Arithmetic Instructions
*/
#define MAXSZ(s) (s->vlen >> (3 - s->lmul))
/*
* 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
* to accerlate vector operation.
*/
static inline uint32_t MAXSZ(DisasContext *s)
{
int scale = s->lmul - 3;
return scale < 0 ? s->vlen >> -scale : s->vlen << scale;
}
static bool opivv_check(DisasContext *s, arg_rmrr *a)
{