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//: jump to 8-bit offset
//:: jump
:(before "End Initialize Op Names")
put_new(Name, "eb", "jump disp8 bytes away (jmp)");
:(code)
void test_jump_rel8() {
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" eb 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: eb\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0xeb: { // jump rel8
int8_t offset = static_cast<int>(next());
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
break;
}
//:: jump if equal/zero
:(before "End Initialize Op Names")
put_new(Name, "74", "jump disp8 bytes away if equal, if ZF is set (jcc/jz/je)");
:(code)
void test_je_rel8_success() {
ZF = true;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 74 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 74\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x74: { // jump rel8 if ZF
const int8_t offset = static_cast<int>(next());
if (ZF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_je_rel8_fail() {
ZF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 74 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 74\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if not equal/not zero
:(before "End Initialize Op Names")
put_new(Name, "75", "jump disp8 bytes away if not equal, if ZF is not set (jcc/jnz/jne)");
:(code)
void test_jne_rel8_success() {
ZF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 75 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 75\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x75: { // jump rel8 unless ZF
const int8_t offset = static_cast<int>(next());
if (!ZF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_jne_rel8_fail() {
ZF = true;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 75 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 75\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if greater
:(before "End Initialize Op Names")
put_new(Name, "7f", "jump disp8 bytes away if greater, if ZF is unset and SF == OF (jcc/jg/jnle)");
:(code)
void test_jg_rel8_success() {
ZF = false;
SF = false;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7f 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7f\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x7f: { // jump rel8 if !SF and !ZF
const int8_t offset = static_cast<int>(next());
if (!ZF && SF == OF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_jg_rel8_fail() {
ZF = false;
SF = true;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7f 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7f\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if greater or equal
:(before "End Initialize Op Names")
put_new(Name, "7d", "jump disp8 bytes away if greater or equal, if SF == OF (jcc/jge/jnl)");
:(code)
void test_jge_rel8_success() {
SF = false;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7d 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7d\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x7d: { // jump rel8 if !SF
const int8_t offset = static_cast<int>(next());
if (SF == OF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_jge_rel8_fail() {
SF = true;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7d 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7d\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if lesser
:(before "End Initialize Op Names")
put_new(Name, "7c", "jump disp8 bytes away if lesser, if SF != OF (jcc/jl/jnge)");
:(code)
void test_jl_rel8_success() {
ZF = false;
SF = true;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7c 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7c\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x7c: { // jump rel8 if SF and !ZF
const int8_t offset = static_cast<int>(next());
if (SF != OF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_jl_rel8_fail() {
ZF = false;
SF = false;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7c 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7c\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
//:: jump if lesser or equal
:(before "End Initialize Op Names")
put_new(Name, "7e", "jump disp8 bytes away if lesser or equal, if ZF is set or SF != OF (jcc/jle/jng)");
:(code)
void test_jle_rel8_equal() {
ZF = true;
SF = false;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7e 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7e\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(code)
void test_jle_rel8_lesser() {
ZF = false;
SF = true;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7e 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7e\n"
"run: jump 5\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: 0x00000003 opcode: 05");
}
:(before "End Single-Byte Opcodes")
case 0x7e: { // jump rel8 if SF or ZF
const int8_t offset = static_cast<int>(next());
if (ZF || SF != OF) {
trace(Callstack_depth+1, "run") << "jump " << NUM(offset) << end();
EIP += offset;
}
break;
}
:(code)
void test_jle_rel8_greater() {
ZF = false;
SF = false;
OF = false;
run(
"== 0x1\n" // code segment
// op ModR/M SIB displacement immediate
" 7e 05 \n" // skip 1 instruction
" 05 00 00 00 01 \n"
" 05 00 00 00 02 \n"
);
CHECK_TRACE_CONTENTS(
"run: 0x00000001 opcode: 7e\n"
"run: 0x00000003 opcode: 05\n"
"run: 0x00000008 opcode: 05\n"
);
CHECK_TRACE_DOESNT_CONTAIN("run: jump 5");
}
|