aboutsummaryrefslogtreecommitdiff
path: root/qtmips_machine
diff options
context:
space:
mode:
authorPavel Pisa <pisa@cmp.felk.cvut.cz>2019-07-03 09:15:26 +0200
committerPavel Pisa <pisa@cmp.felk.cvut.cz>2019-07-03 09:19:03 +0200
commita3929e9fbe17f859f6835c50b0fd039ecb60a8f9 (patch)
tree4199fc20b07b44162828fa96bf74ecc5a37e127e /qtmips_machine
parentb2d8910f3f60b50bf3fc359dfa37a4da2414cd2f (diff)
downloadqtmips-a3929e9fbe17f859f6835c50b0fd039ecb60a8f9.tar.gz
qtmips-a3929e9fbe17f859f6835c50b0fd039ecb60a8f9.tar.bz2
qtmips-a3929e9fbe17f859f6835c50b0fd039ecb60a8f9.zip
Add option to parse and show symbolic registers names.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Diffstat (limited to 'qtmips_machine')
-rw-r--r--qtmips_machine/instruction.cpp76
-rw-r--r--qtmips_machine/instruction.h3
2 files changed, 78 insertions, 1 deletions
diff --git a/qtmips_machine/instruction.cpp b/qtmips_machine/instruction.cpp
index 49604ca..3713cdb 100644
--- a/qtmips_machine/instruction.cpp
+++ b/qtmips_machine/instruction.cpp
@@ -48,6 +48,8 @@
using namespace machine;
+bool Instruction::symbolic_registers_fl = false;
+
#define IMF_SUB_ENCODE(bits, shift) (((bits) << 8) | (shift))
#define IMF_SUB_GET_BITS(subcode) (((subcode) >> 8) & 0xff)
#define IMF_SUB_GET_SHIFT(subcode) ((subcode) & 0xff)
@@ -135,6 +137,49 @@ static bool fill_argdesbycode() {
bool argdesbycode_filled = fill_argdesbycode();
+struct RegisterDesc {
+ int kind;
+ int number;
+ const char *name;
+};
+
+#define REGISTER_CODES 32
+
+const RegisterDesc regbycode[REGISTER_CODES] = {
+ [0] = {0, 0, "zero"},
+ [1] = {0, 1, "at"},
+ [2] = {0, 2, "v0"},
+ [3] = {0, 3, "v1"},
+ [4] = {0, 4, "a0"},
+ [5] = {0, 5, "a1"},
+ [6] = {0, 6, "a2"},
+ [7] = {0, 7, "a3"},
+ [8] = {0, 8, "t0"},
+ [9] = {0, 9, "t1"},
+ [10] = {0, 10, "t2"},
+ [11] = {0, 11, "t3"},
+ [12] = {0, 12, "t4"},
+ [13] = {0, 13, "t5"},
+ [14] = {0, 14, "t6"},
+ [15] = {0, 15, "t7"},
+ [16] = {0, 16, "s0"},
+ [17] = {0, 17, "s1"},
+ [18] = {0, 18, "s2"},
+ [19] = {0, 19, "s3"},
+ [20] = {0, 20, "s4"},
+ [21] = {0, 21, "s5"},
+ [22] = {0, 22, "s6"},
+ [23] = {0, 23, "s7"},
+ [24] = {0, 24, "t8"},
+ [25] = {0, 25, "t9"},
+ [26] = {0, 26, "k0"},
+ [27] = {0, 27, "k1"},
+ [28] = {0, 28, "gp"},
+ [29] = {0, 29, "sp"},
+ [30] = {0, 30, "s8"},
+ [31] = {0, 31, "ra"},
+};
+
#define FLAGS_ALU_I_NO_RS (IMF_SUPPORTED | IMF_ALUSRC | IMF_REGWRITE)
#define FLAGS_ALU_I (IMF_SUPPORTED | IMF_ALUSRC | IMF_REGWRITE | IMF_ALU_REQ_RS)
#define FLAGS_ALU_I_ZE (FLAGS_ALU_I | IMF_ZERO_EXTEND)
@@ -958,7 +1003,10 @@ QString Instruction::to_str(std::int32_t inst_addr) const {
field <<= adesc->shift;
switch (adesc->kind) {
case 'g':
- res += "$" + QString::number(field);
+ if (symbolic_registers_fl)
+ res += "$" + QString(regbycode[field].name);
+ else
+ res += "$" + QString::number(field);
break;
case 'o':
case 'n':
@@ -1024,6 +1072,19 @@ static int parse_reg_from_string(QString str, uint *chars_taken = nullptr)
uint ctk;
if (str.count() < 2 || str.at(0) != '$')
return -1;
+
+ if (str.at(1).isLetter()) {
+ str = str.mid(1);
+ for (i = 0 ; i < REGISTER_CODES; i++) {
+ if (str == regbycode[i].name) {
+ if (chars_taken != nullptr)
+ *chars_taken = str.count() + 1;
+ return regbycode[i].number;
+ }
+ }
+ return -1;
+ }
+
char cstr[str.count() + 1];
for (i = 0; i < str.count(); i++)
cstr[i] = str.at(i).toLatin1();
@@ -1354,3 +1415,16 @@ void Instruction::append_recognized_instructions(QStringList &list) {
list.append("LI");
list.append("NOP");
}
+
+void Instruction::set_symbolic_registers(bool enable) {
+ symbolic_registers_fl = enable;
+}
+
+void Instruction::append_recognized_registers(QStringList &list) {
+ int i;
+ for (i = 0 ; i < REGISTER_CODES; i++) {
+ QString name = regbycode[i].name;
+ if (name != "")
+ list.append(name);
+ }
+}
diff --git a/qtmips_machine/instruction.h b/qtmips_machine/instruction.h
index 03b8f65..b07a0e8 100644
--- a/qtmips_machine/instruction.h
+++ b/qtmips_machine/instruction.h
@@ -162,8 +162,11 @@ public:
bool update(std::int64_t val, RelocExpression *relocexp);
static void append_recognized_instructions(QStringList &list);
+ static void set_symbolic_registers(bool enable);
+ static void append_recognized_registers(QStringList &list);
private:
std::uint32_t dt;
+ static bool symbolic_registers_fl;
};
}