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authorPavel Pisa <pisa@cmp.felk.cvut.cz>2019-07-02 21:12:43 +0200
committerPavel Pisa <pisa@cmp.felk.cvut.cz>2019-07-02 21:12:43 +0200
commitaf72300b313141ff3d10e52bf170b21ec1759cc9 (patch)
tree8382d83ec6c858607ad37c64ffe89f6b944e7c8f /qtmips_machine
parent8cfa2c11ad3354e74d5ba9b50eb6cea222a85463 (diff)
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Extend instruction parsing to accept numeric value continuing by expression.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Diffstat (limited to 'qtmips_machine')
-rw-r--r--qtmips_machine/instruction.cpp35
1 files changed, 30 insertions, 5 deletions
diff --git a/qtmips_machine/instruction.cpp b/qtmips_machine/instruction.cpp
index f62605b..b851461 100644
--- a/qtmips_machine/instruction.cpp
+++ b/qtmips_machine/instruction.cpp
@@ -38,6 +38,8 @@
#include <QStringList>
#include <QChar>
#include <iostream>
+#include <cctype>
+#include <cstring>
#include "instruction.h"
#include "alu.h"
#include "memory.h"
@@ -1095,6 +1097,7 @@ ssize_t Instruction::code_from_string(std::uint32_t *code, size_t buffsize,
}
QString fl = inst_fields.at(field++);
foreach (QChar ao, arg) {
+ bool need_reloc = false;
const char *p;
char *r;
uint a = ao.toLatin1();
@@ -1116,6 +1119,7 @@ ssize_t Instruction::code_from_string(std::uint32_t *code, size_t buffsize,
}
uint bits = IMF_SUB_GET_BITS(adesc->loc);
uint shift = IMF_SUB_GET_SHIFT(adesc->loc);
+ int shift_right = adesc->shift;
std::uint64_t val = 0;
uint chars_taken = 0;
@@ -1132,7 +1136,9 @@ ssize_t Instruction::code_from_string(std::uint32_t *code, size_t buffsize,
FALLTROUGH
case 'o':
case 'n':
+ shift_right += options & 0xff;
if(fl.at(0).isDigit() || (reloc == nullptr)) {
+ std::uint64_t num_val;
int i;
// Qt functions are limited, toLongLong would be usable
// but does not return information how many characters
@@ -1144,31 +1150,51 @@ ssize_t Instruction::code_from_string(std::uint32_t *code, size_t buffsize,
cstr[i] = 0;
p = cstr;
if (adesc->min < 0)
- val += std::strtoll(p, &r, 0);
+ num_val = std::strtoll(p, &r, 0);
else
- val += std::strtoull(p, &r, 0);
+ num_val = std::strtoull(p, &r, 0);
+ while(*r && std::isspace(*r))
+ r++;
+ if (*r && std::strchr("+-/*|&^~", *r))
+ need_reloc = true;
+ else
+ val += num_val;
chars_taken = r - p;
} else {
+ need_reloc = true;
+ }
+ if (need_reloc && (reloc != nullptr)) {
reloc_append(reloc, fl, inst_addr, val, adesc, &chars_taken, line, options);
val = 0;
}
break;
case 'a':
+ shift_right += options & 0xff;
val -= (inst_addr + 4) & 0xf0000000;
if(fl.at(0).isDigit() || (reloc == nullptr)) {
+ std::uint64_t num_val;
int i;
char cstr[fl.count() + 1];
for (i = 0; i < fl.count(); i++)
cstr[i] = fl.at(i).toLatin1();
cstr[i] = 0;
p = cstr;
- val += std::strtoull(p, &r, 0);
+ num_val = std::strtoull(p, &r, 0);
+ while(*r && std::isspace(*r))
+ r++;
+ if (*r && std::strchr("+-/*|&^~", *r))
+ need_reloc = true;
+ else
+ val += num_val;
chars_taken = r - p;
- break;
} else {
+ need_reloc = true;
+ }
+ if (need_reloc && (reloc != nullptr)) {
reloc_append(reloc, fl, val, inst_addr, adesc, &chars_taken, line, options);
val = 0;
}
+ break;
}
if (chars_taken <= 0) {
field = -1;
@@ -1179,7 +1205,6 @@ ssize_t Instruction::code_from_string(std::uint32_t *code, size_t buffsize,
field = -1;
break;
}
- int shift_right = adesc->shift + (options & 0xff);
if (adesc->min >= 0)
val = (val >> shift_right) ;
else