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Commute: Status -> Flags as per usual x86 naming.

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This commit is contained in:
Thomas Harte
2023-11-02 16:55:38 -04:00
parent 18820644b0
commit 83850d7596
5 changed files with 197 additions and 196 deletions
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48
InstructionSets/x86/Status.hpp → InstructionSets/x86/Flags.hpp
View File

@@ -1,19 +1,19 @@
//
// Status.hpp
// Flags.hpp
// Clock Signal
//
// Created by Thomas Harte on 05/10/2023.
// Copyright © 2023 Thomas Harte. All rights reserved.
//
#ifndef InstructionSets_x86_Status_hpp
#define InstructionSets_x86_Status_hpp
#ifndef InstructionSets_x86_Flags_hpp
#define InstructionSets_x86_Flags_hpp
#include "../../Numeric/Carry.hpp"
namespace InstructionSet::x86 {
namespace ConditionCode {
namespace FlagValue {
//
// Standard flags.
@@ -77,7 +77,7 @@ enum class Condition {
LessOrEqual
};
class Status {
class Flags {
public:
using FlagT = uint32_t;
@@ -156,33 +156,33 @@ class Status {
// Complete value get and set.
void set(uint16_t value) {
set_from<Flag::Carry>(value & ConditionCode::Carry);
set_from<Flag::AuxiliaryCarry>(value & ConditionCode::AuxiliaryCarry);
set_from<Flag::Overflow>(value & ConditionCode::Overflow);
set_from<Flag::Trap>(value & ConditionCode::Trap);
set_from<Flag::Interrupt>(value & ConditionCode::Interrupt);
set_from<Flag::Direction>(value & ConditionCode::Direction);
set_from<Flag::Carry>(value & FlagValue::Carry);
set_from<Flag::AuxiliaryCarry>(value & FlagValue::AuxiliaryCarry);
set_from<Flag::Overflow>(value & FlagValue::Overflow);
set_from<Flag::Trap>(value & FlagValue::Trap);
set_from<Flag::Interrupt>(value & FlagValue::Interrupt);
set_from<Flag::Direction>(value & FlagValue::Direction);
set_from<uint8_t, Flag::Sign>(value);
set_from<Flag::Zero>((~value) & ConditionCode::Zero);
set_from<Flag::ParityOdd>((~value) & ConditionCode::Parity);
set_from<Flag::Zero>((~value) & FlagValue::Zero);
set_from<Flag::ParityOdd>((~value) & FlagValue::Parity);
}
uint16_t get() const {
return
0xf002 |
(flag<Flag::Carry>() ? ConditionCode::Carry : 0) |
(flag<Flag::AuxiliaryCarry>() ? ConditionCode::AuxiliaryCarry : 0) |
(flag<Flag::Sign>() ? ConditionCode::Sign : 0) |
(flag<Flag::Overflow>() ? ConditionCode::Overflow : 0) |
(flag<Flag::Trap>() ? ConditionCode::Trap : 0) |
(flag<Flag::Interrupt>() ? ConditionCode::Interrupt : 0) |
(flag<Flag::Direction>() ? ConditionCode::Direction : 0) |
(flag<Flag::Zero>() ? ConditionCode::Zero : 0) |
(flag<Flag::Carry>() ? FlagValue::Carry : 0) |
(flag<Flag::AuxiliaryCarry>() ? FlagValue::AuxiliaryCarry : 0) |
(flag<Flag::Sign>() ? FlagValue::Sign : 0) |
(flag<Flag::Overflow>() ? FlagValue::Overflow : 0) |
(flag<Flag::Trap>() ? FlagValue::Trap : 0) |
(flag<Flag::Interrupt>() ? FlagValue::Interrupt : 0) |
(flag<Flag::Direction>() ? FlagValue::Direction : 0) |
(flag<Flag::Zero>() ? FlagValue::Zero : 0) |
(flag<Flag::ParityOdd>() ? 0 : ConditionCode::Parity);
(flag<Flag::ParityOdd>() ? 0 : FlagValue::Parity);
}
std::string to_string() const {
@@ -204,7 +204,7 @@ class Status {
return result;
}
bool operator ==(const Status &rhs) const {
bool operator ==(const Flags &rhs) const {
return get() == rhs.get();
}
@@ -230,4 +230,4 @@ class Status {
}
#endif /* InstructionSets_x86_Status_hpp */
#endif /* InstructionSets_x86_Flags_hpp */

268
InstructionSets/x86/Implementation/PerformImplementation.hpp
View File

@@ -236,12 +236,12 @@ void aaa(CPU::RegisterPair16 &ax, ContextT &context) { // P. 313
The AF and CF flags are set to 1 if the adjustment results in a decimal carry;
otherwise they are cleared to 0. The OF, SF, ZF, and PF flags are undefined.
*/
if((ax.halves.low & 0x0f) > 9 || context.status.template flag<Flag::AuxiliaryCarry>()) {
if((ax.halves.low & 0x0f) > 9 || context.flags.template flag<Flag::AuxiliaryCarry>()) {
ax.halves.low += 6;
++ax.halves.high;
context.status.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(1);
context.flags.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(1);
} else {
context.status.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(0);
context.flags.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(0);
}
ax.halves.low &= 0x0f;
}
@@ -260,7 +260,7 @@ void aad(CPU::RegisterPair16 &ax, uint8_t imm, ContextT &context) {
*/
ax.halves.low = ax.halves.low + (ax.halves.high * imm);
ax.halves.high = 0;
context.status.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(ax.halves.low);
context.flags.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(ax.halves.low);
}
template <typename ContextT>
@@ -284,7 +284,7 @@ void aam(CPU::RegisterPair16 &ax, uint8_t imm, ContextT &context) {
ax.halves.high = ax.halves.low / imm;
ax.halves.low = ax.halves.low % imm;
context.status.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(ax.halves.low);
context.flags.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(ax.halves.low);
}
template <typename ContextT>
@@ -306,12 +306,12 @@ void aas(CPU::RegisterPair16 &ax, ContextT &context) {
The AF and CF flags are set to 1 if there is a decimal borrow;
otherwise, they are cleared to 0. The OF, SF, ZF, and PF flags are undefined.
*/
if((ax.halves.low & 0x0f) > 9 || context.status.template flag<Flag::AuxiliaryCarry>()) {
if((ax.halves.low & 0x0f) > 9 || context.flags.template flag<Flag::AuxiliaryCarry>()) {
ax.halves.low -= 6;
--ax.halves.high;
context.status.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(1);
context.flags.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(1);
} else {
context.status.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(0);
context.flags.template set_from<Flag::Carry, Flag::AuxiliaryCarry>(0);
}
ax.halves.low &= 0x0f;
}
@@ -347,25 +347,25 @@ void daa(uint8_t &al, ContextT &context) {
The SF, ZF, and PF flags are set according to the result. The OF flag is undefined.
*/
const uint8_t old_al = al;
const auto old_carry = context.status.template flag<Flag::Carry>();
context.status.template set_from<Flag::Carry>(0);
const auto old_carry = context.flags.template flag<Flag::Carry>();
context.flags.template set_from<Flag::Carry>(0);
if((al & 0x0f) > 0x09 || context.status.template flag<Flag::AuxiliaryCarry>()) {
context.status.template set_from<Flag::Carry>(old_carry | (al > 0xf9));
if((al & 0x0f) > 0x09 || context.flags.template flag<Flag::AuxiliaryCarry>()) {
context.flags.template set_from<Flag::Carry>(old_carry | (al > 0xf9));
al += 0x06;
context.status.template set_from<Flag::AuxiliaryCarry>(1);
context.flags.template set_from<Flag::AuxiliaryCarry>(1);
} else {
context.status.template set_from<Flag::AuxiliaryCarry>(0);
context.flags.template set_from<Flag::AuxiliaryCarry>(0);
}
if(old_al > 0x99 || old_carry) {
al += 0x60;
context.status.template set_from<Flag::Carry>(1);
context.flags.template set_from<Flag::Carry>(1);
} else {
context.status.template set_from<Flag::Carry>(0);
context.flags.template set_from<Flag::Carry>(0);
}
context.status.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(al);
context.flags.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(al);
}
template <typename ContextT>
@@ -399,25 +399,25 @@ void das(uint8_t &al, ContextT &context) {
The SF, ZF, and PF flags are set according to the result. The OF flag is undefined.
*/
const uint8_t old_al = al;
const auto old_carry = context.status.template flag<Flag::Carry>();
context.status.template set_from<Flag::Carry>(0);
const auto old_carry = context.flags.template flag<Flag::Carry>();
context.flags.template set_from<Flag::Carry>(0);
if((al & 0x0f) > 0x09 || context.status.template flag<Flag::AuxiliaryCarry>()) {
context.status.template set_from<Flag::Carry>(old_carry | (al < 0x06));
if((al & 0x0f) > 0x09 || context.flags.template flag<Flag::AuxiliaryCarry>()) {
context.flags.template set_from<Flag::Carry>(old_carry | (al < 0x06));
al -= 0x06;
context.status.template set_from<Flag::AuxiliaryCarry>(1);
context.flags.template set_from<Flag::AuxiliaryCarry>(1);
} else {
context.status.template set_from<Flag::AuxiliaryCarry>(0);
context.flags.template set_from<Flag::AuxiliaryCarry>(0);
}
if(old_al > 0x99 || old_carry) {
al -= 0x60;
context.status.template set_from<Flag::Carry>(1);
context.flags.template set_from<Flag::Carry>(1);
} else {
context.status.template set_from<Flag::Carry>(0);
context.flags.template set_from<Flag::Carry>(0);
}
context.status.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(al);
context.flags.template set_from<uint8_t, Flag::Zero, Flag::Sign, Flag::ParityOdd>(al);
}
template <bool with_carry, typename IntT, typename ContextT>
@@ -428,16 +428,16 @@ void add(IntT &destination, IntT source, ContextT &context) {
/*
The OF, SF, ZF, AF, CF, and PF flags are set according to the result.
*/
const IntT result = destination + source + (with_carry ? context.status.template carry_bit<IntT>() : 0);
const IntT result = destination + source + (with_carry ? context.flags.template carry_bit<IntT>() : 0);
context.status.template set_from<Flag::Carry>(
context.flags.template set_from<Flag::Carry>(
Numeric::carried_out<true, Numeric::bit_size<IntT>() - 1>(destination, source, result));
context.status.template set_from<Flag::AuxiliaryCarry>(
context.flags.template set_from<Flag::AuxiliaryCarry>(
Numeric::carried_in<4>(destination, source, result));
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Overflow>(
Numeric::overflow<true, IntT>(destination, source, result));
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
destination = result;
}
@@ -450,16 +450,16 @@ void sub(IntT &destination, IntT source, ContextT &context) {
/*
The OF, SF, ZF, AF, CF, and PF flags are set according to the result.
*/
const IntT result = destination - source - (with_borrow ? context.status.template carry_bit<IntT>() : 0);
const IntT result = destination - source - (with_borrow ? context.flags.template carry_bit<IntT>() : 0);
context.status.template set_from<Flag::Carry>(
context.flags.template set_from<Flag::Carry>(
Numeric::carried_out<false, Numeric::bit_size<IntT>() - 1>(destination, source, result));
context.status.template set_from<Flag::AuxiliaryCarry>(
context.flags.template set_from<Flag::AuxiliaryCarry>(
Numeric::carried_in<4>(destination, source, result));
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Overflow>(
Numeric::overflow<false, IntT>(destination, source, result));
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
if constexpr (write_back) {
destination = result;
@@ -486,8 +486,8 @@ void test(IntT &destination, IntT source, ContextT &context) {
*/
const IntT result = destination & source;
context.status.template set_from<Flag::Carry, Flag::Overflow>(0);
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
context.flags.template set_from<Flag::Carry, Flag::Overflow>(0);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(result);
}
template <typename IntT>
@@ -519,7 +519,7 @@ void mul(IntT &destination_high, IntT &destination_low, IntT source, ContextT &c
*/
destination_high = (destination_low * source) >> (8 * sizeof(IntT));
destination_low *= source;
context.status.template set_from<Flag::Overflow, Flag::Carry>(destination_high);
context.flags.template set_from<Flag::Overflow, Flag::Carry>(destination_high);
}
template <typename IntT, typename ContextT>
@@ -554,7 +554,7 @@ void imul(IntT &destination_high, IntT &destination_low, IntT source, ContextT &
destination_low = IntT(sIntT(destination_low) * sIntT(source));
const auto sign_extension = (destination_low & Numeric::top_bit<IntT>()) ? IntT(~0) : 0;
context.status.template set_from<Flag::Overflow, Flag::Carry>(destination_high != sign_extension);
context.flags.template set_from<Flag::Overflow, Flag::Carry>(destination_high != sign_extension);
}
template <typename IntT, typename ContextT>
@@ -681,9 +681,9 @@ void inc(IntT &destination, ContextT &context) {
*/
++destination;
context.status.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
context.status.template set_from<Flag::AuxiliaryCarry>(((destination - 1) ^ destination) & 0x10);
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
context.flags.template set_from<Flag::AuxiliaryCarry>(((destination - 1) ^ destination) & 0x10);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -716,7 +716,7 @@ void loop(IntT &counter, OffsetT displacement, ContextT &context) {
template <typename IntT, typename OffsetT, typename ContextT>
void loope(IntT &counter, OffsetT displacement, ContextT &context) {
--counter;
if(counter && context.status.template flag<Flag::Zero>()) {
if(counter && context.flags.template flag<Flag::Zero>()) {
context.flow_controller.jump(context.registers.ip() + displacement);
}
}
@@ -724,7 +724,7 @@ void loope(IntT &counter, OffsetT displacement, ContextT &context) {
template <typename IntT, typename OffsetT, typename ContextT>
void loopne(IntT &counter, OffsetT displacement, ContextT &context) {
--counter;
if(counter && !context.status.template flag<Flag::Zero>()) {
if(counter && !context.flags.template flag<Flag::Zero>()) {
context.flow_controller.jump(context.registers.ip() + displacement);
}
}
@@ -738,12 +738,12 @@ void dec(IntT &destination, ContextT &context) {
The CF flag is not affected.
The OF, SF, ZF, AF, and PF flags are set according to the result.
*/
context.status.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
context.flags.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
--destination;
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.status.template set_from<Flag::AuxiliaryCarry>(((destination + 1) ^ destination) & 0x10);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::AuxiliaryCarry>(((destination + 1) ^ destination) & 0x10);
}
template <typename IntT, typename ContextT>
@@ -757,8 +757,8 @@ void and_(IntT &destination, IntT source, ContextT &context) {
*/
destination &= source;
context.status.template set_from<Flag::Overflow, Flag::Carry>(0);
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Overflow, Flag::Carry>(0);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -772,8 +772,8 @@ void or_(IntT &destination, IntT source, ContextT &context) {
*/
destination |= source;
context.status.template set_from<Flag::Overflow, Flag::Carry>(0);
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Overflow, Flag::Carry>(0);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -787,8 +787,8 @@ void xor_(IntT &destination, IntT source, ContextT &context) {
*/
destination ^= source;
context.status.template set_from<Flag::Overflow, Flag::Carry>(0);
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Overflow, Flag::Carry>(0);
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -804,13 +804,13 @@ void neg(IntT &destination, ContextT &context) {
The CF flag cleared to 0 if the source operand is 0; otherwise it is set to 1.
The OF, SF, ZF, AF, and PF flags are set according to the result.
*/
context.status.template set_from<Flag::AuxiliaryCarry>(Numeric::carried_in<4>(IntT(0), destination, IntT(-destination)));
context.flags.template set_from<Flag::AuxiliaryCarry>(Numeric::carried_in<4>(IntT(0), destination, IntT(-destination)));
destination = -destination;
context.status.template set_from<Flag::Carry>(destination);
context.status.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
context.status.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Carry>(destination);
context.flags.template set_from<Flag::Overflow>(destination == Numeric::top_bit<IntT>());
context.flags.template set_from<IntT, Flag::Zero, Flag::Sign, Flag::ParityOdd>(destination);
}
template <typename IntT>
@@ -915,7 +915,7 @@ void iret(ContextT &context) {
context.memory.preauthorise_stack_read(sizeof(uint16_t) * 3);
const auto ip = pop<uint16_t, true>(context);
const auto cs = pop<uint16_t, true>(context);
context.status.set(pop<uint16_t, true>(context));
context.flags.set(pop<uint16_t, true>(context));
context.flow_controller.jump(cs, ip);
}
@@ -984,7 +984,7 @@ void mov(IntT &destination, IntT source) {
template <typename ContextT>
void into(ContextT &context) {
if(context.status.template flag<Flag::Overflow>()) {
if(context.flags.template flag<Flag::Overflow>()) {
interrupt(Interrupt::OnOverflow, context);
}
}
@@ -994,11 +994,11 @@ void sahf(uint8_t &ah, ContextT &context) {
/*
EFLAGS(SF:ZF:0:AF:0:PF:1:CF) ← AH;
*/
context.status.template set_from<uint8_t, Flag::Sign>(ah);
context.status.template set_from<Flag::Zero>(!(ah & 0x40));
context.status.template set_from<Flag::AuxiliaryCarry>(ah & 0x10);
context.status.template set_from<Flag::ParityOdd>(!(ah & 0x04));
context.status.template set_from<Flag::Carry>(ah & 0x01);
context.flags.template set_from<uint8_t, Flag::Sign>(ah);
context.flags.template set_from<Flag::Zero>(!(ah & 0x40));
context.flags.template set_from<Flag::AuxiliaryCarry>(ah & 0x10);
context.flags.template set_from<Flag::ParityOdd>(!(ah & 0x04));
context.flags.template set_from<Flag::Carry>(ah & 0x01);
}
template <typename ContextT>
@@ -1007,12 +1007,12 @@ void lahf(uint8_t &ah, ContextT &context) {
AH ← EFLAGS(SF:ZF:0:AF:0:PF:1:CF);
*/
ah =
(context.status.template flag<Flag::Sign>() ? 0x80 : 0x00) |
(context.status.template flag<Flag::Zero>() ? 0x40 : 0x00) |
(context.status.template flag<Flag::AuxiliaryCarry>() ? 0x10 : 0x00) |
(context.status.template flag<Flag::ParityOdd>() ? 0x00 : 0x04) |
(context.flags.template flag<Flag::Sign>() ? 0x80 : 0x00) |
(context.flags.template flag<Flag::Zero>() ? 0x40 : 0x00) |
(context.flags.template flag<Flag::AuxiliaryCarry>() ? 0x10 : 0x00) |
(context.flags.template flag<Flag::ParityOdd>() ? 0x00 : 0x04) |
0x02 |
(context.status.template flag<Flag::Carry>() ? 0x01 : 0x00);
(context.flags.template flag<Flag::Carry>() ? 0x01 : 0x00);
}
template <typename IntT>
@@ -1034,32 +1034,32 @@ void cwd(IntT &dx, IntT ax) {
// TODO: changes to the interrupt flag do quite a lot more in protected mode.
template <typename ContextT>
void clc(ContextT &context) { context.status.template set_from<Flag::Carry>(0); }
void clc(ContextT &context) { context.flags.template set_from<Flag::Carry>(0); }
template <typename ContextT>
void cld(ContextT &context) { context.status.template set_from<Flag::Direction>(0); }
void cld(ContextT &context) { context.flags.template set_from<Flag::Direction>(0); }
template <typename ContextT>
void cli(ContextT &context) { context.status.template set_from<Flag::Interrupt>(0); }
void cli(ContextT &context) { context.flags.template set_from<Flag::Interrupt>(0); }
template <typename ContextT>
void stc(ContextT &context) { context.status.template set_from<Flag::Carry>(1); }
void stc(ContextT &context) { context.flags.template set_from<Flag::Carry>(1); }
template <typename ContextT>
void std(ContextT &context) { context.status.template set_from<Flag::Direction>(1); }
void std(ContextT &context) { context.flags.template set_from<Flag::Direction>(1); }
template <typename ContextT>
void sti(ContextT &context) { context.status.template set_from<Flag::Interrupt>(1); }
void sti(ContextT &context) { context.flags.template set_from<Flag::Interrupt>(1); }
template <typename ContextT>
void cmc(ContextT &context) {
context.status.template set_from<Flag::Carry>(!context.status.template flag<Flag::Carry>());
context.flags.template set_from<Flag::Carry>(!context.flags.template flag<Flag::Carry>());
}
template <typename ContextT>
void salc(uint8_t &al, ContextT &context) {
al = context.status.template flag<Flag::Carry>() ? 0xff : 0x00;
al = context.flags.template flag<Flag::Carry>() ? 0xff : 0x00;
}
template <typename IntT, typename ContextT>
void setmo(IntT &destination, ContextT &context) {
destination = ~0;
context.status.template set_from<Flag::Carry, Flag::AuxiliaryCarry, Flag::Overflow>(0);
context.status.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Carry, Flag::AuxiliaryCarry, Flag::Overflow>(0);
context.flags.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -1094,7 +1094,7 @@ void rcl(IntT &destination, uint8_t count, ContextT &context) {
it is undefined for multi-bit rotates. The SF, ZF, AF, and PF flags are not affected.
*/
const auto temp_count = count % (Numeric::bit_size<IntT>() + 1);
auto carry = context.status.template carry_bit<IntT>();
auto carry = context.flags.template carry_bit<IntT>();
switch(temp_count) {
case 0: break;
case Numeric::bit_size<IntT>(): {
@@ -1112,8 +1112,8 @@ void rcl(IntT &destination, uint8_t count, ContextT &context) {
} break;
}
context.status.template set_from<Flag::Carry>(carry);
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Carry>(carry);
context.flags.template set_from<Flag::Overflow>(
((destination >> (Numeric::bit_size<IntT>() - 1)) & 1) ^ carry
);
}
@@ -1134,8 +1134,8 @@ void rcr(IntT &destination, uint8_t count, ContextT &context) {
tempCOUNT ← tempCOUNT – 1;
OD;
*/
auto carry = context.status.template carry_bit<IntT>();
context.status.template set_from<Flag::Overflow>(
auto carry = context.flags.template carry_bit<IntT>();
context.flags.template set_from<Flag::Overflow>(
((destination >> (Numeric::bit_size<IntT>() - 1)) & 1) ^ carry
);
@@ -1157,7 +1157,7 @@ void rcr(IntT &destination, uint8_t count, ContextT &context) {
} break;
}
context.status.template set_from<Flag::Carry>(carry);
context.flags.template set_from<Flag::Carry>(carry);
}
template <typename IntT, typename ContextT>
@@ -1201,8 +1201,8 @@ void rol(IntT &destination, uint8_t count, ContextT &context) {
(destination >> (Numeric::bit_size<IntT>() - temp_count));
}
context.status.template set_from<Flag::Carry>(destination & 1);
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Carry>(destination & 1);
context.flags.template set_from<Flag::Overflow>(
((destination >> (Numeric::bit_size<IntT>() - 1)) ^ destination) & 1
);
}
@@ -1248,8 +1248,8 @@ void ror(IntT &destination, uint8_t count, ContextT &context) {
(destination << (Numeric::bit_size<IntT>() - temp_count));
}
context.status.template set_from<Flag::Carry>(destination & Numeric::top_bit<IntT>());
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Carry>(destination & Numeric::top_bit<IntT>());
context.flags.template set_from<Flag::Overflow>(
(destination ^ (destination << 1)) & Numeric::top_bit<IntT>()
);
}
@@ -1315,26 +1315,26 @@ void sal(IntT &destination, uint8_t count, ContextT &context) {
switch(count) {
case 0: return;
case Numeric::bit_size<IntT>():
context.status.template set_from<Flag::Carry, Flag::Overflow>(destination & 1);
context.flags.template set_from<Flag::Carry, Flag::Overflow>(destination & 1);
destination = 0;
break;
default:
if(count > Numeric::bit_size<IntT>()) {
context.status.template set_from<Flag::Carry, Flag::Overflow>(0);
context.flags.template set_from<Flag::Carry, Flag::Overflow>(0);
destination = 0;
} else {
const auto mask = (Numeric::top_bit<IntT>() >> (count - 1));
context.status.template set_from<Flag::Carry>(
context.flags.template set_from<Flag::Carry>(
destination & mask
);
context.status.template set_from<Flag::Overflow>(
context.flags.template set_from<Flag::Overflow>(
(destination ^ (destination << 1)) & mask
);
destination <<= count;
}
break;
}
context.status.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
context.flags.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -1346,14 +1346,14 @@ void sar(IntT &destination, uint8_t count, ContextT &context) {
const IntT sign = Numeric::top_bit<IntT>() & destination;
if(count >= Numeric::bit_size<IntT>()) {
destination = sign ? IntT(~0) : IntT(0);
context.status.template set_from<Flag::Carry>(sign);
context.flags.template set_from<Flag::Carry>(sign);
} else {
const IntT mask = 1 << (count - 1);
context.status.template set_from<Flag::Carry>(destination & mask);
context.flags.template set_from<Flag::Carry>(destination & mask);
destination = (destination >> count) | (sign ? ~(IntT(~0) >> count) : 0);
}
context.status.template set_from<Flag::Overflow>(0);
context.status.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
context.flags.template set_from<Flag::Overflow>(0);
context.flags.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
}
template <typename IntT, typename ContextT>
@@ -1362,29 +1362,29 @@ void shr(IntT &destination, uint8_t count, ContextT &context) {
return;
}
context.status.template set_from<Flag::Overflow>(Numeric::top_bit<IntT>() & destination);
context.flags.template set_from<Flag::Overflow>(Numeric::top_bit<IntT>() & destination);
if(count == Numeric::bit_size<IntT>()) {
context.status.template set_from<Flag::Carry>(Numeric::top_bit<IntT>() & destination);
context.flags.template set_from<Flag::Carry>(Numeric::top_bit<IntT>() & destination);
destination = 0;
} else if(count > Numeric::bit_size<IntT>()) {
context.status.template set_from<Flag::Carry>(0);
context.flags.template set_from<Flag::Carry>(0);
destination = 0;
} else {
const IntT mask = 1 << (count - 1);
context.status.template set_from<Flag::Carry>(destination & mask);
context.flags.template set_from<Flag::Carry>(destination & mask);
destination >>= count;
}
context.status.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
context.flags.template set_from<IntT, Flag::Sign, Flag::Zero, Flag::ParityOdd>(destination);
}
template <typename ContextT>
void popf(ContextT &context) {
context.status.set(pop<uint16_t, false>(context));
context.flags.set(pop<uint16_t, false>(context));
}
template <typename ContextT>
void pushf(ContextT &context) {
uint16_t value = context.status.get();
uint16_t value = context.flags.get();
push<uint16_t, false>(value, context);
}
@@ -1403,7 +1403,7 @@ void repeat(AddressT &eCX, ContextT &context) {
}
if constexpr (repetition != Repetition::Rep) {
// If this is RepE or RepNE, also test the zero flag.
if((repetition == Repetition::RepNE) == context.status.template flag<Flag::Zero>()) {
if((repetition == Repetition::RepNE) == context.flags.template flag<Flag::Zero>()) {
return;
}
}
@@ -1418,8 +1418,8 @@ void cmps(const InstructionT &instruction, AddressT &eCX, AddressT &eSI, Address
IntT lhs = context.memory.template access<IntT, AccessType::Read>(instruction.data_segment(), eSI);
const IntT rhs = context.memory.template access<IntT, AccessType::Read>(Source::ES, eDI);
eSI += context.status.template direction<AddressT>() * sizeof(IntT);
eDI += context.status.template direction<AddressT>() * sizeof(IntT);
eSI += context.flags.template direction<AddressT>() * sizeof(IntT);
eDI += context.flags.template direction<AddressT>() * sizeof(IntT);
Primitive::sub<false, false>(lhs, rhs, context);
@@ -1433,7 +1433,7 @@ void scas(AddressT &eCX, AddressT &eDI, IntT &eAX, ContextT &context) {
}
const IntT rhs = context.memory.template access<IntT, AccessType::Read>(Source::ES, eDI);
eDI += context.status.template direction<AddressT>() * sizeof(IntT);
eDI += context.flags.template direction<AddressT>() * sizeof(IntT);
Primitive::sub<false, false>(eAX, rhs, context);
@@ -1447,7 +1447,7 @@ void lods(const InstructionT &instruction, AddressT &eCX, AddressT &eSI, IntT &e
}
eAX = context.memory.template access<IntT, AccessType::Read>(instruction.data_segment(), eSI);
eSI += context.status.template direction<AddressT>() * sizeof(IntT);
eSI += context.flags.template direction<AddressT>() * sizeof(IntT);
repeat<AddressT, repetition>(eCX, context);
}
@@ -1461,8 +1461,8 @@ void movs(const InstructionT &instruction, AddressT &eCX, AddressT &eSI, Address
context.memory.template access<IntT, AccessType::Write>(Source::ES, eDI) =
context.memory.template access<IntT, AccessType::Read>(instruction.data_segment(), eSI);
eSI += context.status.template direction<AddressT>() * sizeof(IntT);
eDI += context.status.template direction<AddressT>() * sizeof(IntT);
eSI += context.flags.template direction<AddressT>() * sizeof(IntT);
eDI += context.flags.template direction<AddressT>() * sizeof(IntT);
repeat<AddressT, repetition>(eCX, context);
}
@@ -1474,7 +1474,7 @@ void stos(AddressT &eCX, AddressT &eDI, IntT &eAX, ContextT &context) {
}
context.memory.template access<IntT, AccessType::Write>(Source::ES, eDI) = eAX;
eDI += context.status.template direction<AddressT>() * sizeof(IntT);
eDI += context.flags.template direction<AddressT>() * sizeof(IntT);
repeat<AddressT, repetition>(eCX, context);
}
@@ -1489,7 +1489,7 @@ void outs(const InstructionT &instruction, AddressT &eCX, uint16_t port, Address
port,
context.memory.template access<IntT, AccessType::Read>(instruction.data_segment(), eSI)
);
eSI += context.status.template direction<AddressT>() * sizeof(IntT);
eSI += context.flags.template direction<AddressT>() * sizeof(IntT);
repeat<AddressT, repetition>(eCX, context);
}
@@ -1501,7 +1501,7 @@ void ins(AddressT &eCX, uint16_t port, AddressT &eDI, ContextT &context) {
}
context.memory.template access<IntT, AccessType::Write>(Source::ES, eDI) = context.io.template in<IntT>(port);
eDI += context.status.template direction<AddressT>() * sizeof(IntT);
eDI += context.flags.template direction<AddressT>() * sizeof(IntT);
repeat<AddressT, repetition>(eCX, context);
}
@@ -1722,22 +1722,22 @@ template <
case Operation::LEA: Primitive::lea(instruction, destination_w(), context); return;
case Operation::MOV: Primitive::mov(destination_w(), source_r()); break;
case Operation::JO: jcc(context.status.template condition<Condition::Overflow>()); return;
case Operation::JNO: jcc(!context.status.template condition<Condition::Overflow>()); return;
case Operation::JB: jcc(context.status.template condition<Condition::Below>()); return;
case Operation::JNB: jcc(!context.status.template condition<Condition::Below>()); return;
case Operation::JZ: jcc(context.status.template condition<Condition::Zero>()); return;
case Operation::JNZ: jcc(!context.status.template condition<Condition::Zero>()); return;
case Operation::JBE: jcc(context.status.template condition<Condition::BelowOrEqual>()); return;
case Operation::JNBE: jcc(!context.status.template condition<Condition::BelowOrEqual>()); return;
case Operation::JS: jcc(context.status.template condition<Condition::Sign>()); return;
case Operation::JNS: jcc(!context.status.template condition<Condition::Sign>()); return;
case Operation::JP: jcc(!context.status.template condition<Condition::ParityOdd>()); return;
case Operation::JNP: jcc(context.status.template condition<Condition::ParityOdd>()); return;
case Operation::JL: jcc(context.status.template condition<Condition::Less>()); return;
case Operation::JNL: jcc(!context.status.template condition<Condition::Less>()); return;
case Operation::JLE: jcc(context.status.template condition<Condition::LessOrEqual>()); return;
case Operation::JNLE: jcc(!context.status.template condition<Condition::LessOrEqual>()); return;
case Operation::JO: jcc(context.flags.template condition<Condition::Overflow>()); return;
case Operation::JNO: jcc(!context.flags.template condition<Condition::Overflow>()); return;
case Operation::JB: jcc(context.flags.template condition<Condition::Below>()); return;
case Operation::JNB: jcc(!context.flags.template condition<Condition::Below>()); return;
case Operation::JZ: jcc(context.flags.template condition<Condition::Zero>()); return;
case Operation::JNZ: jcc(!context.flags.template condition<Condition::Zero>()); return;
case Operation::JBE: jcc(context.flags.template condition<Condition::BelowOrEqual>()); return;
case Operation::JNBE: jcc(!context.flags.template condition<Condition::BelowOrEqual>()); return;
case Operation::JS: jcc(context.flags.template condition<Condition::Sign>()); return;
case Operation::JNS: jcc(!context.flags.template condition<Condition::Sign>()); return;
case Operation::JP: jcc(!context.flags.template condition<Condition::ParityOdd>()); return;
case Operation::JNP: jcc(context.flags.template condition<Condition::ParityOdd>()); return;
case Operation::JL: jcc(context.flags.template condition<Condition::Less>()); return;
case Operation::JNL: jcc(!context.flags.template condition<Condition::Less>()); return;
case Operation::JLE: jcc(context.flags.template condition<Condition::LessOrEqual>()); return;
case Operation::JNLE: jcc(!context.flags.template condition<Condition::LessOrEqual>()); return;
case Operation::RCL: Primitive::rcl(destination_rmw(), shift_count(), context); break;
case Operation::RCR: Primitive::rcr(destination_rmw(), shift_count(), context); break;
@@ -1923,9 +1923,9 @@ template <
const uint16_t ip = context.memory.template access<uint16_t, AccessType::PreauthorisedRead>(address);
const uint16_t cs = context.memory.template access<uint16_t, AccessType::PreauthorisedRead>(address + 2);
auto flags = context.status.get();
auto flags = context.flags.get();
Primitive::push<uint16_t, true>(flags, context);
context.status.template set_from<Flag::Interrupt, Flag::Trap>(0);
context.flags.template set_from<Flag::Interrupt, Flag::Trap>(0);
// Push CS and IP.
Primitive::push<uint16_t, true>(context.registers.cs(), context);

4
InstructionSets/x86/Perform.hpp
View File

@@ -11,7 +11,7 @@
#include "Instruction.hpp"
#include "Model.hpp"
#include "Status.hpp"
#include "Flags.hpp"
namespace InstructionSet::x86 {
@@ -44,7 +44,7 @@ template <
typename IOT
> struct ExecutionContext {
FlowControllerT flow_controller;
Status status;
Flags flags;
RegistersT registers;
MemoryT memory;
IOT io;

6
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
View File

@@ -1125,7 +1125,7 @@
/* Begin PBXFileReference section */
423BDC492AB24699008E37B6 /* 8088Tests.mm */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.objcpp; path = 8088Tests.mm; sourceTree = "<group>"; };
42437B342ACF02A9006DFED1 /* Status.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Status.hpp; sourceTree = "<group>"; };
42437B342ACF02A9006DFED1 /* Flags.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Flags.hpp; sourceTree = "<group>"; };
42437B352ACF0AA2006DFED1 /* Perform.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Perform.hpp; sourceTree = "<group>"; };
42437B382ACF2798006DFED1 /* PerformImplementation.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = PerformImplementation.hpp; sourceTree = "<group>"; };
42437B392AD07465006DFED1 /* Interrupts.hpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.h; path = Interrupts.hpp; sourceTree = "<group>"; };
@@ -4999,11 +4999,11 @@
4B69DEB52AB79E4F0055B217 /* Instruction.cpp */,
4BEDA3B825B25563000C2DBD /* Decoder.hpp */,
4BEDA3DB25B2588F000C2DBD /* Instruction.hpp */,
42437B392AD07465006DFED1 /* Interrupts.hpp */,
4BE3C69527CBC540000EAD28 /* Model.hpp */,
42437B352ACF0AA2006DFED1 /* Perform.hpp */,
42437B342ACF02A9006DFED1 /* Status.hpp */,
42437B342ACF02A9006DFED1 /* Flags.hpp */,
42437B372ACF2798006DFED1 /* Implementation */,
42437B392AD07465006DFED1 /* Interrupts.hpp */,
);
path = x86;
sourceTree = "<group>";

67
OSBindings/Mac/Clock SignalTests/8088Tests.mm
View File

@@ -21,6 +21,7 @@
#include "../../../InstructionSets/x86/Decoder.hpp"
#include "../../../InstructionSets/x86/Perform.hpp"
#include "../../../InstructionSets/x86/Flags.hpp"
#include "../../../Numeric/RegisterSizes.hpp"
namespace {
@@ -29,7 +30,7 @@ namespace {
// provide their real path here.
constexpr char TestSuiteHome[] = "/Users/tharte/Projects/ProcessorTests/8088/v1";
using Status = InstructionSet::x86::Status;
using Flags = InstructionSet::x86::Flags;
struct Registers {
CPU::RegisterPair16 ax_;
uint8_t &al() { return ax_.halves.low; }
@@ -287,8 +288,8 @@ struct IO {
};
class FlowController {
public:
FlowController(Memory &memory, Registers &registers, Status &status) :
memory_(memory), registers_(registers), status_(status) {}
FlowController(Memory &memory, Registers &registers, Flags &flags) :
memory_(memory), registers_(registers), flags_(flags) {}
// Requirements for perform.
void jump(uint16_t address) {
@@ -318,19 +319,19 @@ class FlowController {
private:
Memory &memory_;
Registers &registers_;
Status &status_;
Flags &flags_;
bool should_repeat_ = false;
};
struct ExecutionSupport {
InstructionSet::x86::Status status;
Flags flags;
Registers registers;
Memory memory;
FlowController flow_controller;
IO io;
static constexpr auto model = InstructionSet::x86::Model::i8086;
ExecutionSupport(): memory(registers), flow_controller(memory, registers, status) {}
ExecutionSupport(): memory(registers), flow_controller(memory, registers, flags) {}
void clear() {
memory.clear();
@@ -494,7 +495,7 @@ struct FailedExecution {
return isEqual;
}
- (void)populate:(Registers &)registers status:(InstructionSet::x86::Status &)status value:(NSDictionary *)value {
- (void)populate:(Registers &)registers flags:(Flags &)flags value:(NSDictionary *)value {
registers.ax_.full = [value[@"ax"] intValue];
registers.bx_.full = [value[@"bx"] intValue];
registers.cx_.full = [value[@"cx"] intValue];
@@ -510,25 +511,25 @@ struct FailedExecution {
registers.ss_ = [value[@"ss"] intValue];
registers.ip_ = [value[@"ip"] intValue];
const uint16_t flags = [value[@"flags"] intValue];
status.set(flags);
const uint16_t flags_value = [value[@"flags"] intValue];
flags.set(flags_value);
// Apply a quick test of flag packing/unpacking.
constexpr auto defined_flags = static_cast<uint16_t>(
InstructionSet::x86::ConditionCode::Carry |
InstructionSet::x86::ConditionCode::Parity |
InstructionSet::x86::ConditionCode::AuxiliaryCarry |
InstructionSet::x86::ConditionCode::Zero |
InstructionSet::x86::ConditionCode::Sign |
InstructionSet::x86::ConditionCode::Trap |
InstructionSet::x86::ConditionCode::Interrupt |
InstructionSet::x86::ConditionCode::Direction |
InstructionSet::x86::ConditionCode::Overflow
InstructionSet::x86::FlagValue::Carry |
InstructionSet::x86::FlagValue::Parity |
InstructionSet::x86::FlagValue::AuxiliaryCarry |
InstructionSet::x86::FlagValue::Zero |
InstructionSet::x86::FlagValue::Sign |
InstructionSet::x86::FlagValue::Trap |
InstructionSet::x86::FlagValue::Interrupt |
InstructionSet::x86::FlagValue::Direction |
InstructionSet::x86::FlagValue::Overflow
);
XCTAssert((status.get() & defined_flags) == (flags & defined_flags),
"Set status of %04x was returned as %04x",
flags & defined_flags,
(status.get() & defined_flags)
XCTAssert((flags.get() & defined_flags) == (flags_value & defined_flags),
"Set flags of %04x was returned as %04x",
flags_value & defined_flags,
(flags.get() & defined_flags)
);
}
@@ -544,7 +545,7 @@ struct FailedExecution {
NSDictionary *const final_state = test[@"final"];
// Apply initial state.
InstructionSet::x86::Status initial_status;
Flags initial_flags;
for(NSArray<NSNumber *> *ram in initial_state[@"ram"]) {
execution_support.memory.seed([ram[0] intValue], [ram[1] intValue]);
}
@@ -552,8 +553,8 @@ struct FailedExecution {
execution_support.memory.touch([ram[0] intValue]);
}
Registers initial_registers;
[self populate:initial_registers status:initial_status value:initial_state[@"regs"]];
execution_support.status = initial_status;
[self populate:initial_registers flags:initial_flags value:initial_state[@"regs"]];
execution_support.flags = initial_flags;
execution_support.registers = initial_registers;
// Execute instruction.
@@ -571,7 +572,7 @@ struct FailedExecution {
// Compare final state.
Registers intended_registers;
InstructionSet::x86::Status intended_status;
InstructionSet::x86::Flags intended_flags;
bool ramEqual = true;
int mask_position = 0;
@@ -602,21 +603,21 @@ struct FailedExecution {
break;
}
[self populate:intended_registers status:intended_status value:final_state[@"regs"]];
[self populate:intended_registers flags:intended_flags value:final_state[@"regs"]];
const bool registersEqual = intended_registers == execution_support.registers;
const bool statusEqual = (intended_status.get() & flags_mask) == (execution_support.status.get() & flags_mask);
const bool flagsEqual = (intended_flags.get() & flags_mask) == (execution_support.flags.get() & flags_mask);
if(!statusEqual || !registersEqual || !ramEqual) {
if(!flagsEqual || !registersEqual || !ramEqual) {
FailedExecution failure;
failure.instruction = decoded.second;
failure.test_name = std::string([test[@"name"] UTF8String]);
NSMutableArray<NSString *> *reasons = [[NSMutableArray alloc] init];
if(!statusEqual) {
Status difference;
difference.set((intended_status.get() ^ execution_support.status.get()) & flags_mask);
if(!flagsEqual) {
Flags difference;
difference.set((intended_flags.get() ^ execution_support.flags.get()) & flags_mask);
[reasons addObject:
[NSString stringWithFormat:@"status differs; errors in %s",
[NSString stringWithFormat:@"flags differs; errors in %s",
difference.to_string().c_str()]];
}
if(!registersEqual) {