diff mbox series

[v2,16/26] target/arm: Implement the STGP instruction

Message ID 20190211010829.29869-17-richard.henderson@linaro.org
State New
Headers show
Series target/arm: Implement ARMv8.5-MemTag | expand

Commit Message

Richard Henderson Feb. 11, 2019, 1:08 a.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

---
 target/arm/translate-a64.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

-- 
2.17.2
diff mbox series

Patch

diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 539c25a80b..9bd68d522c 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -2701,7 +2701,7 @@  static void disas_ld_lit(DisasContext *s, uint32_t insn)
  * +-----+-------+---+---+-------+---+-------+-------+------+------+
  *
  * opc: LDP/STP/LDNP/STNP        00 -> 32 bit, 10 -> 64 bit
- *      LDPSW                    01
+ *      LDPSW/STGP               01
  *      LDP/STP/LDNP/STNP (SIMD) 00 -> 32 bit, 01 -> 64 bit, 10 -> 128 bit
  *   V: 0 -> GPR, 1 -> Vector
  * idx: 00 -> signed offset with non-temporal hint, 01 -> post-index,
@@ -2726,6 +2726,7 @@  static void disas_ldst_pair(DisasContext *s, uint32_t insn)
     bool is_signed = false;
     bool postindex = false;
     bool wback = false;
+    bool set_tag = false;
 
     TCGv_i64 clean_addr, dirty_addr;
 
@@ -2738,6 +2739,14 @@  static void disas_ldst_pair(DisasContext *s, uint32_t insn)
 
     if (is_vector) {
         size = 2 + opc;
+    } else if (opc == 1 && !is_load) {
+        /* STGP */
+        if (!dc_isar_feature(aa64_mte_insn_reg, s) || index == 0) {
+            unallocated_encoding(s);
+            return;
+        }
+        size = 3;
+        set_tag = true;
     } else {
         size = 2 + extract32(opc, 1, 1);
         is_signed = extract32(opc, 0, 1);
@@ -2788,7 +2797,12 @@  static void disas_ldst_pair(DisasContext *s, uint32_t insn)
     if (!postindex) {
         tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
     }
-    clean_addr = clean_data_tbi(s, dirty_addr, wback || rn != 31);
+    if (set_tag) {
+        clean_addr = new_tmp_a64(s);
+        gen_helper_stg(clean_addr, cpu_env, dirty_addr);
+    } else {
+        clean_addr = clean_data_tbi(s, dirty_addr, wback || rn != 31);
+    }
 
     if (is_vector) {
         if (is_load) {