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Restrict shift operand size, causing text output at last.

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This commit is contained in:
Thomas Harte 2025-04-03 17:42:15 -04:00
parent 88ed49a833
commit 7c7675179e
3 changed files with 8 additions and 3 deletions
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5
InstructionSets/x86/Decoder.cpp
View File

@ -791,6 +791,11 @@ std::pair<int, typename Decoder<model>::InstructionT> Decoder<model>::decode(
case ModRegRMFormat::MemRegROL_to_SAR:
destination_ = memreg;
// TODO: is this true? It appears empirically to be so from the PC AT BIOS, but find a source.
if(operand_size_ != DataSize::None) {
operand_size_ = DataSize::Byte;
}
switch(reg) {
default:
if constexpr (model == Model::i8086) {

4
InstructionSets/x86/Descriptors.hpp
View File

@ -25,12 +25,12 @@ struct Descriptor {
Descriptor() = default;
Descriptor(const uint16_t descriptor[4]) noexcept {
printf("%04x %04x %04x %04x", descriptor[0], descriptor[1], descriptor[2], descriptor[3]);
// printf("%04x %04x %04x %04x", descriptor[0], descriptor[1], descriptor[2], descriptor[3]);
base_ = uint32_t(descriptor[1] | ((descriptor[2] & 0xff) << 16));
limit_ = descriptor[0];
printf(" -> %04x -> +%04x\n", base_, limit_);
// printf(" -> %04x -> +%04x\n", base_, limit_);
present_ = descriptor[2] & 0x8000;
privilege_level_ = (descriptor[2] >> 13) & 3;

2
Machines/PCCompatible/Segments.hpp
View File

@ -69,7 +69,7 @@ public:
memory_.template access<uint16_t, AccessType::Read>(table_address + 6, table_end)
};
printf("%s [%04x -> %08x]: ", InstructionSet::x86::to_string(segment, InstructionSet::x86::DataSize::Word).c_str(), value, table_address);
// printf("%s [%04x -> %08x]: ", InstructionSet::x86::to_string(segment, InstructionSet::x86::DataSize::Word).c_str(), value, table_address);
const Descriptor incoming(entry);
// switch(segment) {