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Agree that JZ/JNZ are clearer (for me) of the synonyms.

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This commit is contained in:
Thomas Harte 2023-09-19 13:38:08 -04:00
parent 2d928199d6
commit e5dfc882cb
5 changed files with 53 additions and 30 deletions
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8
InstructionSets/x86/Decoder.cpp
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@ -261,8 +261,8 @@ std::pair<int, typename Decoder<model>::InstructionT> Decoder<model>::decode(con
case 0x71: Displacement(JNO, DataSize::Byte); break;
case 0x72: Displacement(JB, DataSize::Byte); break;
case 0x73: Displacement(JNB, DataSize::Byte); break;
case 0x74: Displacement(JE, DataSize::Byte); break;
case 0x75: Displacement(JNE, DataSize::Byte); break;
case 0x74: Displacement(JZ, DataSize::Byte); break;
case 0x75: Displacement(JNZ, DataSize::Byte); break;
case 0x76: Displacement(JBE, DataSize::Byte); break;
case 0x77: Displacement(JNBE, DataSize::Byte); break;
case 0x78: Displacement(JS, DataSize::Byte); break;
@ -497,8 +497,8 @@ std::pair<int, typename Decoder<model>::InstructionT> Decoder<model>::decode(con
case 0x71: RequiresMin(i80386); Displacement(JNO, data_size_); break;
case 0x72: RequiresMin(i80386); Displacement(JB, data_size_); break;
case 0x73: RequiresMin(i80386); Displacement(JNB, data_size_); break;
case 0x74: RequiresMin(i80386); Displacement(JE, data_size_); break;
case 0x75: RequiresMin(i80386); Displacement(JNE, data_size_); break;
case 0x74: RequiresMin(i80386); Displacement(JZ, data_size_); break;
case 0x75: RequiresMin(i80386); Displacement(JNZ, data_size_); break;
case 0x76: RequiresMin(i80386); Displacement(JBE, data_size_); break;
case 0x77: RequiresMin(i80386); Displacement(JNBE, data_size_); break;
case 0x78: RequiresMin(i80386); Displacement(JS, data_size_); break;

4
InstructionSets/x86/Instruction.cpp
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@ -45,8 +45,8 @@ std::string InstructionSet::x86::to_string(Operation operation, DataSize size) {
case Operation::JNO: return "jno";
case Operation::JB: return "jb";
case Operation::JNB: return "jnb";
case Operation::JE: return "jo";
case Operation::JNE: return "jne";
case Operation::JZ: return "jz";
case Operation::JNZ: return "jnz";
case Operation::JBE: return "jbe";
case Operation::JNBE: return "jnbe";
case Operation::JS: return "js";

26
InstructionSets/x86/Instruction.hpp
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@ -87,7 +87,7 @@ enum class Operation: uint8_t {
OUT,
// Various jumps; see the displacement to calculate targets.
JO, JNO, JB, JNB, JE, JNE, JBE, JNBE,
JO, JNO, JB, JNB, JZ, JNZ, JBE, JNBE,
JS, JNS, JP, JNP, JL, JNL, JLE, JNLE,
/// Near call.
@ -340,18 +340,26 @@ enum class Operation: uint8_t {
MOVtoTr, MOVfromTr,
};
constexpr int num_operands(Operation operation) {
constexpr bool has_displacement(Operation operation) {
switch(operation) {
default: return 2;
default: return false;
case Operation::JO: case Operation::JNO:
case Operation::JB: case Operation::JNB:
case Operation::JE: case Operation::JNE:
case Operation::JZ: case Operation::JNZ:
case Operation::JBE: case Operation::JNBE:
case Operation::JS: case Operation::JNS:
case Operation::JP: case Operation::JNP:
case Operation::JL: case Operation::JNL:
case Operation::JLE: case Operation::JNLE:
return true;
}
}
constexpr int num_operands(Operation operation) {
switch(operation) {
default: return 2;
case Operation::INC: case Operation::DEC:
case Operation::POP: case Operation::PUSH:
case Operation::MUL:
@ -360,6 +368,16 @@ constexpr int num_operands(Operation operation) {
case Operation::ESC:
return 1;
// Pedantically, these have an displacement rather than an operand.
case Operation::JO: case Operation::JNO:
case Operation::JB: case Operation::JNB:
case Operation::JZ: case Operation::JNZ:
case Operation::JBE: case Operation::JNBE:
case Operation::JS: case Operation::JNS:
case Operation::JP: case Operation::JNP:
case Operation::JL: case Operation::JNL:
case Operation::JLE: case Operation::JNLE:
// Genuine zero-operand instructions:
case Operation::CMPS: case Operation::LODS:
case Operation::MOVS: case Operation::SCAS:
case Operation::STOS:

41
OSBindings/Mac/Clock SignalTests/8088Tests.mm
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@ -104,7 +104,19 @@ constexpr char TestSuiteHome[] = "/Users/tharte/Projects/ProcessorTests/8088/v1"
operation += to_string(decoded.second.operation, decoded.second.operation_size());
auto to_string = [] (InstructionSet::x86::DataPointer pointer, const auto &instruction) -> std::string {
auto to_hex = [] (int value, int digits) -> std::string {
auto stream = std::stringstream();
stream << std::setfill('0') << std::uppercase << std::hex << std::setw(digits);
switch(digits) {
case 2: stream << +uint8_t(value); break;
case 4: stream << +uint16_t(value); break;
default: stream << value; break;
}
stream << 'h';
return stream.str();
};
auto to_string = [&to_hex] (InstructionSet::x86::DataPointer pointer, const auto &instruction) -> std::string {
std::string operand;
using Source = InstructionSet::x86::Source;
@ -113,17 +125,11 @@ constexpr char TestSuiteHome[] = "/Users/tharte/Projects/ProcessorTests/8088/v1"
// to_string handles all direct register names correctly.
default: return InstructionSet::x86::to_string(source, instruction.operation_size());
case Source::Immediate: {
auto stream = std::stringstream();
stream << std::setfill('0') << std::uppercase << std::hex;
if(instruction.operation_size() == InstructionSet::x86::DataSize::Byte) {
stream << std::setw(2) << uint8_t(instruction.operand());
} else {
stream << std::setw(4) << instruction.operand();
}
stream << 'h';
return stream.str();
}
case Source::Immediate:
return to_hex(
instruction.operand(),
instruction.operation_size() == InstructionSet::x86::DataSize::Byte ? 2 : 4
);
case Source::Indirect:
return (std::stringstream() <<
@ -139,18 +145,17 @@ constexpr char TestSuiteHome[] = "/Users/tharte/Projects/ProcessorTests/8088/v1"
};
const int operands = num_operands(decoded.second.operation);
const bool displacement = has_displacement(decoded.second.operation);
operation += " ";
if(operands > 1) {
operation += " ";
operation += to_string(decoded.second.destination(), decoded.second);
operation += ",";
operation += ", ";
}
if(operands > 0) {
operation += " ";
operation += to_string(decoded.second.source(), decoded.second);
}
if(!operands) {
// These tests always leave a space after the operation.
operation += " ";
if(displacement) {
operation += to_hex(decoded.second.displacement(), 2);
}
const NSString *objcOperation = [NSString stringWithUTF8String:operation.c_str()];

4
OSBindings/Mac/Clock SignalTests/x86DecoderTests.mm
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@ -533,11 +533,11 @@ decode(const std::initializer_list<uint8_t> &stream, bool set_32_bit = false) {
// cmp ecx,DWORD PTR [ebp+0x2c87445f]
// jecxz 0x00000084 (from 0x82)
// sahf
// je 0x000000f3 (from 0x85)
// jz 0x000000f3 (from 0x85)
test(instructions[52], DataSize::DWord, Operation::CMP, ScaleIndexBase(Source::eBP), Source::eCX, 0, 0x2c87445f);
test(instructions[53], Operation::JPCX, 0, 0x02);
test(instructions[54], Operation::SAHF);
test(instructions[55], Operation::JE, 0, 0x6e);
test(instructions[55], Operation::JZ, 0, 0x6e);
// sbb ecx,DWORD PTR [edi+0x433c54d]
// lahf