End the indirect jump when potential hotspot is detected

Currently, the indirect jump does not switch to T1C when potential hotspot is detected, it would make execution stuck in interpreter mode. This modification make execution end when potential hotspot is detected.
sysprog21 · Mar 4, 2024 · c5625e8 · c5625e8 · jserv · Mar 4, 2024
1 parent 7ebe625
commit c5625e8
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/src/rv32_template.c b/src/rv32_template.c
@@ -226,8 +226,8 @@ RVOP(
         for (int i = 0; i < HISTORY_SIZE; i++) {                              \
             if (ir->branch_table->PC[i] == PC) {                              \
                 ir->branch_table->times[i]++;                                 \
-                MUST_TAIL return block->ir_head->impl(rv, block->ir_head,     \
-                                                      cycle, PC);             \
+                if (cache_hot(rv->block_cache, PC))                           \
+                    goto end_insn;                                            \
             }                                                                 \
         }                                                                     \
         /* update branch history table */                                     \
@@ -243,6 +243,8 @@ RVOP(
         }                                                                     \
         ir->branch_table->times[min_idx] = 1;                                 \
         ir->branch_table->PC[min_idx] = PC;                                   \
+        if (cache_hot(rv->block_cache, PC))                                   \
+            goto end_insn;                                                    \
         MUST_TAIL return block->ir_head->impl(rv, block->ir_head, cycle, PC); \
     }
 #endif
@@ -267,6 +269,7 @@ RVOP(
         RV_EXC_MISALIGN_HANDLER(pc, insn, false, 0);
 #endif
         LOOKUP_OR_UPDATE_BRANCH_HISTORY_TABLE();
+    end_insn:
         rv->csr_cycle = cycle;
         rv->PC = PC;
         return true;
@@ -2286,6 +2289,7 @@ RVOP(
     {
         PC = rv->X[ir->rs1];
         LOOKUP_OR_UPDATE_BRANCH_HISTORY_TABLE();
+    end_insn:
         rv->csr_cycle = cycle;
         rv->PC = PC;
         return true;
@@ -2338,6 +2342,7 @@ RVOP(
         rv->X[rv_reg_ra] = PC + 2;
         PC = jump_to;
         LOOKUP_OR_UPDATE_BRANCH_HISTORY_TABLE();
+    end_insn:
         rv->csr_cycle = cycle;
         rv->PC = PC;
         return true;