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-rw-r--r--qtmips_machine/core.cpp20
-rw-r--r--qtmips_machine/core.h4
-rw-r--r--qtmips_machine/machinedefs.h2
3 files changed, 22 insertions, 4 deletions
diff --git a/qtmips_machine/core.cpp b/qtmips_machine/core.cpp
index 45b08ec..64c309b 100644
--- a/qtmips_machine/core.cpp
+++ b/qtmips_machine/core.cpp
@@ -275,6 +275,7 @@ struct Core::dtFetch Core::fetch(bool skip_break) {
.inst_addr = inst_addr,
.excause = excause,
.in_delay_slot = false,
+ .is_valid = true,
};
}
@@ -316,7 +317,7 @@ struct Core::dtDecode Core::decode(const struct dtFetch &dt) {
excause = dt.inst.encoded_exception();
}
- emit decode_inst_addr_value(dt.inst_addr);
+ emit decode_inst_addr_value(dt.is_valid? dt.inst_addr: STAGEADDR_NONE);
emit instruction_decoded(dt.inst, dt.inst_addr, excause);
emit decode_instruction_value(dt.inst.data());
emit decode_reg1_value(val_rs);
@@ -374,6 +375,7 @@ struct Core::dtDecode Core::decode(const struct dtFetch &dt) {
.in_delay_slot = dt.in_delay_slot,
.stall = false,
.stop_if = !!(flags & IMF_STOP_IF),
+ .is_valid = dt.is_valid,
};
}
@@ -447,7 +449,7 @@ struct Core::dtExecute Core::execute(const struct dtDecode &dt) {
}
}
- emit execute_inst_addr_value(dt.inst_addr);
+ emit execute_inst_addr_value(dt.is_valid? dt.inst_addr: STAGEADDR_NONE);
emit instruction_executed(dt.inst, dt.inst_addr, excause);
emit execute_alu_value(alu_val);
emit execute_reg1_value(dt.val_rs);
@@ -485,6 +487,7 @@ struct Core::dtExecute Core::execute(const struct dtDecode &dt) {
.excause = excause,
.in_delay_slot = dt.in_delay_slot,
.stop_if = dt.stop_if,
+ .is_valid = dt.is_valid,
};
}
@@ -514,7 +517,7 @@ struct Core::dtMemory Core::memory(const struct dtExecute &dt) {
regwrite = false;
}
- emit memory_inst_addr_value(dt.inst_addr);
+ emit memory_inst_addr_value(dt.is_valid? dt.inst_addr: STAGEADDR_NONE);
emit instruction_memory(dt.inst, dt.inst_addr, dt.excause);
emit memory_alu_value(dt.alu_val);
emit memory_rt_value(dt.val_rt);
@@ -537,11 +540,12 @@ struct Core::dtMemory Core::memory(const struct dtExecute &dt) {
.excause = dt.excause,
.in_delay_slot = dt.in_delay_slot,
.stop_if = dt.stop_if,
+ .is_valid = dt.is_valid,
};
}
void Core::writeback(const struct dtMemory &dt) {
- emit writeback_inst_addr_value(dt.inst_addr);
+ emit writeback_inst_addr_value(dt.is_valid? dt.inst_addr: STAGEADDR_NONE);
emit instruction_writeback(dt.inst, dt.inst_addr, dt.excause);
emit writeback_value(dt.towrite_val);
emit writeback_regw_value(dt.regwrite);
@@ -600,6 +604,7 @@ void Core::dtFetchInit(struct dtFetch &dt) {
dt.inst = Instruction(0x00);
dt.excause = EXCAUSE_NONE;
dt.in_delay_slot = false;
+ dt.is_valid = false;
}
void Core::dtDecodeInit(struct dtDecode &dt) {
@@ -632,6 +637,7 @@ void Core::dtDecodeInit(struct dtDecode &dt) {
dt.in_delay_slot = false;
dt.stall = false;
dt.stop_if = false;
+ dt.is_valid = false;
}
void Core::dtExecuteInit(struct dtExecute &dt) {
@@ -646,6 +652,7 @@ void Core::dtExecuteInit(struct dtExecute &dt) {
dt.excause = EXCAUSE_NONE;
dt.in_delay_slot = false;
dt.stop_if = false;
+ dt.is_valid = false;
}
void Core::dtMemoryInit(struct dtMemory &dt) {
@@ -658,6 +665,7 @@ void Core::dtMemoryInit(struct dtMemory &dt) {
dt.excause = EXCAUSE_NONE;
dt.in_delay_slot = false;
dt.stop_if = false;
+ dt.is_valid = false;
}
CoreSingle::CoreSingle(Registers *regs, MemoryAccess *mem_program, MemoryAccess *mem_data,
@@ -742,16 +750,19 @@ void CorePipelined::do_step(bool skip_break) {
if (excpt_in_progress) {
dtExecuteInit(dt_e);
emit instruction_executed(dt_e.inst, dt_e.inst_addr, dt_e.excause);
+ emit execute_inst_addr_value(STAGEADDR_NONE);
}
excpt_in_progress = excpt_in_progress || dt_e.excause != EXCAUSE_NONE;
if (excpt_in_progress) {
dtDecodeInit(dt_d);
emit instruction_decoded(dt_d.inst, dt_d.inst_addr, dt_d.excause);
+ emit decode_inst_addr_value(STAGEADDR_NONE);
}
excpt_in_progress = excpt_in_progress || dt_e.excause != EXCAUSE_NONE;
if (excpt_in_progress) {
dtFetchInit(dt_f);
emit instruction_fetched(dt_f.inst, dt_f.inst_addr, dt_f.excause);
+ emit fetch_inst_addr_value(STAGEADDR_NONE);
if (dt_m.excause != EXCAUSE_NONE) {
regs->pc_abs_jmp(dt_e.inst_addr);
handle_exception(this, regs, dt_m.excause, dt_m.inst_addr,
@@ -867,6 +878,7 @@ void CorePipelined::do_step(bool skip_break) {
if (dt_d.nb_skip_ds) {
dtFetchInit(dt_f);
emit instruction_fetched(dt_f.inst, dt_f.inst_addr, dt_f.excause);
+ emit fetch_inst_addr_value(STAGEADDR_NONE);
}
}
} else {
diff --git a/qtmips_machine/core.h b/qtmips_machine/core.h
index 52cadb4..5658726 100644
--- a/qtmips_machine/core.h
+++ b/qtmips_machine/core.h
@@ -186,6 +186,7 @@ protected:
uint32_t inst_addr; // Address of instruction
enum ExceptionCause excause;
bool in_delay_slot;
+ bool is_valid;
};
struct dtDecode {
Instruction inst;
@@ -222,6 +223,7 @@ protected:
bool in_delay_slot;
bool stall;
bool stop_if;
+ bool is_valid;
};
struct dtExecute {
Instruction inst;
@@ -236,6 +238,7 @@ protected:
enum ExceptionCause excause;
bool in_delay_slot;
bool stop_if;
+ bool is_valid;
};
struct dtMemory {
Instruction inst;
@@ -248,6 +251,7 @@ protected:
enum ExceptionCause excause;
bool in_delay_slot;
bool stop_if;
+ bool is_valid;
};
struct dtFetch fetch(bool skip_break = false);
diff --git a/qtmips_machine/machinedefs.h b/qtmips_machine/machinedefs.h
index d8219b6..9f85240 100644
--- a/qtmips_machine/machinedefs.h
+++ b/qtmips_machine/machinedefs.h
@@ -141,6 +141,8 @@ enum LocationStatus {
LOCSTAT_ILLEGAL = 1 << 3,
};
+const std::uint32_t STAGEADDR_NONE = 0xffffffff;
+
}
#endif // MACHINEDEFS_H
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 02:33:08 +0000