From 90ff09bc10c5652396fabef39a969713ffc45afb Mon Sep 17 00:00:00 2001
From: fridtjof <fridtjof@das-labor.org>
Date: Fri, 8 May 2026 19:08:49 +0200
Subject: [PATCH] add runtime printing for call/return

this makes it easier to follow execution and figure out what's currently running
---
 target/cr16c/helper.c    | 4 ++++
 target/cr16c/helper.h    | 1 +
 target/cr16c/translate.c | 9 +++++++++
 3 files changed, 14 insertions(+)

diff --git a/target/cr16c/helper.c b/target/cr16c/helper.c
index 0f43a2ab28..9a558ae947 100644
--- a/target/cr16c/helper.c
+++ b/target/cr16c/helper.c
@@ -29,3 +29,7 @@ void helper_dump_regs(CPUCR16CState* env) {
     qemu_printf("State dump requested:\n");
     cr16c_debug_dump_state(env_cpu(env));
 }
+
+void helper_print_addr(const void * insn, uint32_t addr) {
+    qemu_printf("%s to: 0x%x\n", (const char *) insn, addr);
+}
diff --git a/target/cr16c/helper.h b/target/cr16c/helper.h
index a5d74d1ca9..8c7d4da74a 100644
--- a/target/cr16c/helper.h
+++ b/target/cr16c/helper.h
@@ -2,3 +2,4 @@ DEF_HELPER_1(raise_illegal_instruction, void, env);
 DEF_HELPER_1(raise_unimplemented_instruction, void, env);
 DEF_HELPER_1(exit, void, env);
 DEF_HELPER_1(dump_regs, void, env);
+DEF_HELPER_2(print_addr, void, cptr, i32);
diff --git a/target/cr16c/translate.c b/target/cr16c/translate.c
index 72d75768fb..a46c4c1a71 100644
--- a/target/cr16c/translate.c
+++ b/target/cr16c/translate.c
@@ -1367,6 +1367,10 @@ static bool trans_JCOND(DisasContext* ctx, arg_JCOND *a) {
 
     gen_set_label(l);
 
+    if (a->cond == CR16C_COND_ALWAYS && a->ra == CR16C_REGNO_RA) {
+        gen_helper_print_addr(tcg_constant_ptr("JUMP ra"), r[a->ra]);
+    }
+
     tcg_gen_mov_i32(pc, r[a->ra]);
     tcg_gen_lookup_and_goto_ptr();
 
@@ -1395,6 +1399,8 @@ static bool trans_JAL(DisasContext* ctx, arg_JAL *a) {
     tcg_gen_extract2_i32(pc, r[a->destrp], r[a->destrp+1], 0);
     tcg_gen_andi_i32(pc, pc, 0xffffff);
     tcg_gen_shli_i32(pc, pc, 1);
+
+    gen_helper_print_addr(tcg_constant_ptr("JAL"), pc);
     tcg_gen_lookup_and_goto_ptr();
 
     // TODO CFG.SR handling
@@ -1723,6 +1729,8 @@ static bool trans_BAL_ra(DisasContext *ctx, arg_BAL_ra *a) {
     // 2) sign extend from 23 -> "25" bits
     int32_t dest_sextend = sextract32(dest_offset, 0, 23);
 
+    gen_helper_print_addr(tcg_constant_ptr("BAL"), tcg_constant_i32(pc_this + dest_sextend));
+
     ctx->base.is_jmp = DISAS_NORETURN;
     gen_goto(&ctx->base, pc_this + dest_sextend, 0);
 
@@ -1759,6 +1767,7 @@ static bool trans_pop(DisasContext  *ctx, arg_pop *a) {
 
     if (a->rt) {
         // basically, JUMP RA
+        gen_helper_print_addr(tcg_constant_ptr("POPRET"), r[CR16C_REGNO_RA]);
         ctx->base.is_jmp = DISAS_NORETURN;
 
         tcg_gen_mov_i32(pc, r[CR16C_REGNO_RA]);