Let finalize_memop_atom be the new basic function, with
finalize_memop and finalize_memop_pair testing FEAT_LSE2
to apply the appropriate atomicity.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
target/arm/tcg/translate.h | 39 +++++++++++++++++++++++++++++-----
target/arm/tcg/translate-a64.c | 2 ++
target/arm/tcg/translate.c | 1 +
3 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index a9d1f4adc2..9a33076c3d 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -85,6 +85,7 @@ typedef struct DisasContext {
uint64_t features; /* CPU features bits */
bool aarch64;
bool thumb;
+ bool lse2;
/* Because unallocated encodings generate different exception syndrome
* information from traps due to FP being disabled, we can't do a single
* "is fp access disabled" check at a high level in the decode tree.
@@ -552,12 +553,13 @@ static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour
flavour)
}
/**
- * finalize_memop:
+ * finalize_memop_atom:
* @s: DisasContext
* @opc: size+sign+align of the memory operation
+ * @atom: atomicity of the memory operation
*
- * Build the complete MemOp for a memory operation, including alignment
- * and endianness.
+ * Build the complete MemOp for a memory operation, including alignment,
+ * endianness, and atomicity.
*
* If (op & MO_AMASK) then the operation already contains the required
* alignment, e.g. for AccType_ATOMIC. Otherwise, this an optionally
@@ -567,12 +569,39 @@ static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour
flavour)
* and this is applied here. Note that there is no way to indicate that
* no alignment should ever be enforced; this must be handled manually.
*/
-static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
+static inline MemOp finalize_memop_atom(DisasContext *s, MemOp opc, MemOp atom)
{
if (s->align_mem && !(opc & MO_AMASK)) {
opc |= MO_ALIGN;
}
- return opc | s->be_data;
+ return opc | atom | s->be_data;
+}
+
+/**
+ * finalize_memop:
+ * @s: DisasContext
+ * @opc: size+sign+align of the memory operation
+ *
+ * Like finalize_memop_atom, but with default atomicity.
+ */
+static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
+{
+ MemOp atom = s->lse2 ? MO_ATOM_WITHIN16 : MO_ATOM_IFALIGN;
+ return finalize_memop_atom(s, opc, atom);
+}
+
+/**
+ * finalize_memop_pair:
+ * @s: DisasContext
+ * @opc: size+sign+align of the memory operation
+ *
+ * Like finalize_memop_atom, but with atomicity for a pair.
+ * C.f. Pseudocode for Mem[], operand ispair.
+ */
+static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
+{
+ MemOp atom = s->lse2 ? MO_ATOM_WITHIN16_PAIR : MO_ATOM_IFALIGN_PAIR;
+ return finalize_memop_atom(s, opc, atom);
}
/**
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 741a608739..967400ed68 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -14110,6 +14110,8 @@ static void
aarch64_tr_init_disas_context(DisasContextBase *dcbase,
tcg_debug_assert(dc->tbid & 1);
#endif
+ dc->lse2 = dc_isar_feature(aa64_lse2, dc);
+
/* Single step state. The code-generation logic here is:
* SS_ACTIVE == 0:
* generate code with no special handling for single-stepping (except
diff --git a/target/arm/tcg/translate.c b/target/arm/tcg/translate.c
index 7468476724..7a6a8029e5 100644
--- a/target/arm/tcg/translate.c
+++ b/target/arm/tcg/translate.c
@@ -9183,6 +9183,7 @@ static void arm_tr_init_disas_context(DisasContextBase
*dcbase, CPUState *cs)
dc->sme_trap_nonstreaming =
EX_TBFLAG_A32(tb_flags, SME_TRAP_NONSTREAMING);
}
+ dc->lse2 = false; /* applies only to aarch64 */
dc->cp_regs = cpu->cp_regs;
dc->features = env->features;
--
2.34.1
