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Prepare for greater nuance on testing sign extensions by text.

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This commit is contained in:
Thomas Harte 2023-09-27 17:06:34 -04:00
parent 2d882d2153
commit 02aeec0173
1 changed files with 37 additions and 28 deletions
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65
OSBindings/Mac/Clock SignalTests/8088Tests.mm
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@ -41,17 +41,44 @@ template <typename InstructionT>
std::string to_string(InstructionSet::x86::DataPointer pointer, const InstructionT &instruction, int offset_length) {
std::string operand;
auto append = [](std::stringstream &stream, auto value, int length, const char *prefix) {
switch(length) {
case 0:
if(!value) {
break;
}
[[fallthrough]];
case 2:
// If asked to pretend the offset was originally two digits then either of: an unsigned
// 8-bit value or a sign-extended 8-bit value as having been originally 8-bit.
//
// This kicks the issue of whether sign was extended appropriately to functionality tests.
if(
!(value & 0xff00) ||
((value & 0xff80) == 0xff80) ||
((value & 0xff80) == 0x0000)
) {
stream << prefix << to_hex(value, 2);
break;
}
[[fallthrough]];
default:
stream << prefix << to_hex(value, 4);
break;
}
};
using Source = InstructionSet::x86::Source;
const Source source = pointer.source<false>();
switch(source) {
// to_string handles all direct register names correctly.
default: return InstructionSet::x86::to_string(source, instruction.operation_size());
case Source::Immediate:
return to_hex(
instruction.operand(),
instruction.operation_size() == InstructionSet::x86::DataSize::Byte ? 2 : 4
);
case Source::Immediate: {
std::stringstream stream;
append(stream, instruction.operand(), instruction.operation_size() == InstructionSet::x86::DataSize::Byte ? 2 : 4, "");
return stream.str();
}
case Source::DirectAddress:
case Source::Indirect:
@ -91,25 +118,7 @@ std::string to_string(InstructionSet::x86::DataPointer pointer, const Instructio
break;
}
if(addOffset) {
switch(offset_length) {
case 0:
if(!instruction.offset()) {
break;
}
[[fallthrough]];
case 2:
// TODO: this mismatches some tests because it doesn't eliminate sign extensions.
// But when is it permissible to eliminate sign extensions? Always for now, and deal
// with it when testing actual execution?
if(!(instruction.offset() & 0xff00)) {
stream << '+' << to_hex(instruction.offset(), 2);
break;
}
[[fallthrough]];
default:
stream << '+' << to_hex(instruction.offset(), 4);
break;
}
append(stream, instruction.offset(), offset_length, "+");
}
stream << ']';
return stream.str();
@ -128,10 +137,10 @@ std::string to_string(InstructionSet::x86::DataPointer pointer, const Instructio
- (NSArray<NSString *> *)testFiles {
NSString *path = [NSString stringWithUTF8String:TestSuiteHome];
NSSet *allowList = nil; /*
[[NSSet alloc] initWithArray:@[
@"D0.5.json.gz",
]]; */
NSSet *allowList = nil;
// [[NSSet alloc] initWithArray:@[
// @"83.0.json.gz",
// ]];
// Unofficial opcodes; ignored for now.
NSSet *ignoreList =