target/arm: Implement the SETG* instructionsfeat-mops

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>

1 files changed, 13 insertions, 5 deletions

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 9d66135170..6e2392b3ba 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -3954,11 +3954,16 @@ 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
@@ -3975,7 +3980,7 @@ static bool do_SET(DisasContext *s, arg_set *a, bool is_epilogue, SetFn fn)
      * We pass option_a == false, 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, false, a->rd, a->rs, a->rn);
 
     if (s->ata) {
@@ -3997,9 +4002,12 @@ 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_setp)
+TRANS_FEAT(SETGM, aa64_mops, do_SET, a, false, true, gen_helper_setm)
+TRANS_FEAT(SETGE, aa64_mops, do_SET, a, true, true, gen_helper_sete)
 
 typedef void ArithTwoOp(TCGv_i64, TCGv_i64, TCGv_i64);