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target/arm: Implement the SETG* instructions

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The FEAT_MOPS SETG* instructions are very similar to the SET*
instructions, but as well as setting memory contents they also
set the MTE tags. They are architecturally required to operate
on tag-granule aligned regions only.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20230912140434.1333369-10-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2023-09-12 15:04:31 +01:00
parent 179e9a3bac
commit 6087df5744
6 changed files with 155 additions and 9 deletions
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20
target/arm/tcg/translate-a64.c
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@ -3964,11 +3964,16 @@ TRANS_FEAT(STZ2G, aa64_mte_insn_reg, do_STG, a, true, true)
typedef void SetFn(TCGv_env, TCGv_i32, TCGv_i32);
static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue, SetFn fn)
static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue,
bool is_setg, SetFn fn)
{
int memidx;
uint32_t syndrome, desc = 0;
if (is_setg && !dc_isar_feature(aa64_mte, s)) {
return false;
}
/*
* UNPREDICTABLE cases: we choose to UNDEF, which allows
* us to pull this check before the CheckMOPSEnabled() test
@ -3985,10 +3990,10 @@ static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue, SetFn fn)
* We pass option_a == true, matching our implementation;
* we pass wrong_option == false: helper function may set that bit.
*/
syndrome = syn_mop(true, false, (a->nontemp << 1) | a->unpriv,
syndrome = syn_mop(true, is_setg, (a->nontemp << 1) | a->unpriv,
is_epilogue, false, true, a->rd, a->rs, a->rn);
if (s->mte_active[a->unpriv]) {
if (is_setg ? s->ata[a->unpriv] : s->mte_active[a->unpriv]) {
/* We may need to do MTE tag checking, so assemble the descriptor */
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
@ -4007,9 +4012,12 @@ static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue, SetFn fn)
return true;
}
TRANS_FEAT(SETP, aa64_mops, do_SET, a, false, gen_helper_setp)
TRANS_FEAT(SETM, aa64_mops, do_SET, a, false, gen_helper_setm)
TRANS_FEAT(SETE, aa64_mops, do_SET, a, true, gen_helper_sete)
TRANS_FEAT(SETP, aa64_mops, do_SET, a, false, false, gen_helper_setp)
TRANS_FEAT(SETM, aa64_mops, do_SET, a, false, false, gen_helper_setm)
TRANS_FEAT(SETE, aa64_mops, do_SET, a, true, false, gen_helper_sete)
TRANS_FEAT(SETGP, aa64_mops, do_SET, a, false, true, gen_helper_setgp)
TRANS_FEAT(SETGM, aa64_mops, do_SET, a, false, true, gen_helper_setgm)
TRANS_FEAT(SETGE, aa64_mops, do_SET, a, true, true, gen_helper_setge)
typedef void ArithTwoOp(TCGv_i64, TCGv_i64, TCGv_i64);