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target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow

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* Only do carry-in or borrow-in if is masked (vm=0).
* Remove clear function from helper functions as the tail elements
  are unchanged in RVV 1.0.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20211210075704.23951-44-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2021-12-10 15:56:29 +08:00 • committed by Alistair Francis
parent a75ae09f2a
commit bb45485ad1
3 changed files with 17 additions and 26 deletions
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2
target/riscv/insn_trans/trans_rvv.c.inc
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@ -1547,7 +1547,7 @@ static bool trans_##NAME(DisasContext *s, arg_rmrr *a) \
/*
* For vadc and vsbc, an illegal instruction exception is raised if the
* destination vector register is v0 and LMUL > 1. (Section 12.3)
* destination vector register is v0 and LMUL > 1. (Section 12.4)
*/
static bool opivv_vadc_check(DisasContext *s, arg_rmrr *a)
{