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Completes MOVE.blw <ea>, Dn/An/(An)/(An)+, implements MOVEq.

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This commit is contained in:
Thomas Harte 2019-03-29 23:13:41 -04:00
parent 25254255fe
commit a93a1ae40f
3 changed files with 334 additions and 199 deletions
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12
Processors/68000/Implementation/68000Implementation.hpp
View File

@ -50,6 +50,8 @@ template <class T, bool dtack_is_implicit> void Processor<T, dtack_is_implicit>:
// TODO: once all instructions are implemnted, this should be an instruction error.
std::cerr << "68000 Abilities exhausted; can't manage instruction " << std::hex << next_instruction << std::endl;
return;
} else {
std::cout << "Performing " << std::hex << next_instruction << std::endl;
}
active_program_ = &instructions[next_instruction];
@ -216,6 +218,16 @@ template <class T, bool dtack_is_implicit> void Processor<T, dtack_is_implicit>:
overflow_flag_ = carry_flag_ = 0;
break;
/*
MOVE.q: a single byte is moved from the current instruction, and sign extended.
*/
case Operation::MOVEq:
zero_result_ = active_program_->destination->full = prefetch_queue_.halves.high.halves.low;
negative_flag_ = zero_result_ & 0x80;
overflow_flag_ = carry_flag_ = 0;
active_program_->destination->full |= negative_flag_ ? 0xffffff00 : 0;
break;
/*
MOVEA.l: move the entire long word;
MOVEA.w: move the least significant word and sign extend it.

512
Processors/68000/Implementation/68000Storage.cpp
View File

@ -35,6 +35,8 @@ struct ProcessorStorageConstructor {
return (mode == 7) ? (0x10 | reg) : mode;
}
#define pseq(x, m) ((((m)&0xff) == 0x06) || (((m)&0xff) == 0x13) ? "n" x : x)
/*!
Installs BusSteps that implement the described program into the relevant
instance storage, returning the offset within @c all_bus_steps_ at which
@ -233,14 +235,15 @@ struct ProcessorStorageConstructor {
RegOpModeReg,
SizeModeRegisterImmediate,
DataSizeModeQuick,
RegisterModeModeRegister, // twelve lowest bits are register, mode, mode, register, for destination and source respectively.
ModeRegister, // six lowest bits are mode, then register.
MOVE, // twelve lowest bits are register, mode, mode, register, for destination and source respectively.
MOVEtoSR, // six lowest bits are [mode, register], decoding to MOVE SR
CMPI, // eight lowest bits are [size, mode, register], decoding to CMPI
BRA, // eight lowest bits are ignored, and an 'n np np' is scheduled
Bcc, // twelve lowest bits are ignored, only a PerformAction is scheduled
LEA, // decodes register, mode, register
MOVEq, // decodes just a destination register
};
using Operation = ProcessorStorage::Operation;
@ -277,9 +280,9 @@ struct ProcessorStorageConstructor {
// {0xff00, 0x0600, Operation::ADD, Decoder::DataSizeModeQuick}, // 4-11 (p115)
{0xf000, 0x1000, Operation::MOVEb, Decoder::RegisterModeModeRegister}, // 4-116 (p220)
{0xf000, 0x2000, Operation::MOVEl, Decoder::RegisterModeModeRegister}, // 4-116 (p220)
{0xf000, 0x3000, Operation::MOVEw, Decoder::RegisterModeModeRegister}, // 4-116 (p220)
{0xf000, 0x1000, Operation::MOVEb, Decoder::MOVE}, // 4-116 (p220)
{0xf000, 0x2000, Operation::MOVEl, Decoder::MOVE}, // 4-116 (p220)
{0xf000, 0x3000, Operation::MOVEw, Decoder::MOVE}, // 4-116 (p220)
{0xffc0, 0x46c0, Operation::MOVEtoSR, Decoder::MOVEtoSR}, // 6-19 (p473)
@ -290,6 +293,7 @@ struct ProcessorStorageConstructor {
{0xff00, 0x6000, Operation::BRA, Decoder::BRA}, // 4-55 (p159)
{0xf000, 0x6000, Operation::Bcc, Decoder::Bcc}, // 4-25 (p129)
{0xf1c0, 0x41c0, Operation::MOVEAl, Decoder::LEA}, // 4-110 (p214)
{0xf100, 0x7000, Operation::MOVEq, Decoder::MOVEq}, // 4-134 (p238)
};
std::vector<size_t> micro_op_pointers(65536, std::numeric_limits<size_t>::max());
@ -317,13 +321,11 @@ struct ProcessorStorageConstructor {
// This decoder actually decodes nothing; it just schedules a PerformOperation followed by an empty step.
case Decoder::Bcc: {
op(Action::PerformOperation);
op();
} break;
// A little artificial, there's nothing really to decode for BRA.
case Decoder::BRA: {
op(Action::PerformOperation, seq("n np np"));
op();
} break;
// Decodes the format used by ABCD and SBCD.
@ -343,7 +345,6 @@ struct ProcessorStorageConstructor {
storage_.instructions[instruction].destination = &storage_.data_[destination];
op(Action::PerformOperation, seq("np n"));
op();
}
} break;
@ -362,13 +363,11 @@ struct ProcessorStorageConstructor {
switch(mode) {
case 0x000: // CMPI.bw #, Dn
op(Action::PerformOperation, seq("np np"));
op();
break;
case 0x100: // CMPI.l #, Dn
op(Action::None, seq("np"));
op(Action::PerformOperation, seq("np np n"));
op();
break;
case 0x002: // CMPI.bw #, (An)
@ -382,7 +381,7 @@ struct ProcessorStorageConstructor {
case 0x102: // CMPI.l #, (An)
case 0x103: // CMPI.l #, (An)+
op(Action::CopyDestinationToEffectiveAddress, seq("np"));
op(int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask, seq("np"));
op(int(Action::AssembleLongWordDataFromPrefetch) | MicroOp::SourceMask, seq("np nR nr np", { &storage_.effective_address_[1].full }));
if(mode == 0x103) {
op(int(Action::Increment4) | MicroOp::DestinationMask);
@ -399,19 +398,17 @@ struct ProcessorStorageConstructor {
case 0x104: // CMPI.l #, -(An)
op(int(Action::Decrement4) | MicroOp::DestinationMask, seq("np"));
op(int(Action::AssembleWordDataFromPrefetch) | MicroOp::SourceMask, seq("np n"));
op(Action::CopyDestinationToEffectiveAddress, seq("nR nr np", { &storage_.effective_address_[1].full }));
op(int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask, seq("nR nr np", { &storage_.effective_address_[1].full }));
op(Action::PerformOperation);
break;
#define pseq(x) ((mode == 0x06) || (mode == 0x13) ? "n" x : x)
case 0x012: // CMPI.bw #, (d16, PC)
case 0x013: // CMPI.bw #, (d8, PC, Xn)
case 0x005: // CMPI.bw #, (d16, An)
case 0x006: // CMPI.bw #, (d8, An, Xn)
op(int(Action::AssembleWordDataFromPrefetch) | MicroOp::SourceMask, seq("np"));
op( calc_action_for_mode(mode) | MicroOp::DestinationMask,
seq(pseq("nr np"), { &storage_.effective_address_[1].full }, !is_byte_access));
seq(pseq("nr np", mode), { &storage_.effective_address_[1].full }, !is_byte_access));
op(Action::PerformOperation);
break;
@ -419,15 +416,13 @@ struct ProcessorStorageConstructor {
case 0x113: // CMPI.l #, (d8, PC, Xn)
case 0x105: // CMPI.l #, (d16, An)
case 0x106: // CMPI.l #, (d8, An, Xn)
op(Action::CopyDestinationToEffectiveAddress, seq("np"));
op(int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask, seq("np"));
op(int(Action::AssembleLongWordDataFromPrefetch) | MicroOp::SourceMask, seq("np"));
op( calc_action_for_mode(mode) | MicroOp::DestinationMask,
seq(pseq("np nR nr np"), { &storage_.effective_address_[1].full }));
seq(pseq("np nR nr np", mode), { &storage_.effective_address_[1].full }));
op(Action::PerformOperation);
break;
#undef pseq
case 0x010: // CMPI.bw #, (xxx).w
op(int(Action::AssembleWordDataFromPrefetch) | MicroOp::SourceMask, seq("np"));
op(int(Action::AssembleWordAddressFromPrefetch) | MicroOp::DestinationMask, seq("np nr np", { &storage_.effective_address_[1].full }, !is_byte_access));
@ -478,7 +473,6 @@ struct ProcessorStorageConstructor {
default: break;
case 0x04: // LEA (An), An (i.e. MOVEA)
op(Action::PerformOperation, seq("np"));
op();
break;
case 0x05: // LEA (d16, An), An
@ -516,7 +510,6 @@ struct ProcessorStorageConstructor {
switch(mode) {
case 0x00: // MOVE Dn, SR
op(Action::PerformOperation, seq("nn np"));
op();
break;
case 0x02: // MOVE (An), SR
@ -533,18 +526,14 @@ struct ProcessorStorageConstructor {
op(Action::PerformOperation);
break;
#define pseq(x) ((mode == 0x06) || (mode == 0x13) ? "n" x : x)
case 0x12: // MOVE (d16, PC), SR
case 0x13: // MOVE (d8, PC, Xn), SR
case 0x05: // MOVE (d16, An), SR
case 0x06: // MOVE (d8, An, Xn), SR
op(calc_action_for_mode(mode) | MicroOp::SourceMask, seq(pseq("np nr nn nn np"), { &storage_.effective_address_[0].full }));
op(calc_action_for_mode(mode) | MicroOp::SourceMask, seq(pseq("np nr nn nn np", mode), { &storage_.effective_address_[0].full }));
op(Action::PerformOperation);
break;
#undef pseq
case 0x10: // MOVE (xxx).W, SR
op(
int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
@ -556,21 +545,25 @@ struct ProcessorStorageConstructor {
op(Action::None, seq("np"));
op(int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask, seq("np nr", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation, seq("nn nn np"));
op();
break;
case 0x14: // MOVE #, SR
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op(int(Action::PerformOperation), seq("np nn nn np"));
op();
break;
default: continue;
}
} break;
case Decoder::MOVEq: {
const int destination_register = (instruction >> 9) & 7;
storage_.instructions[instruction].destination = &storage_.data_[destination_register];
op(Action::PerformOperation, seq("np"));
} break;
// Decodes the format used by most MOVEs and all MOVEAs.
case Decoder::RegisterModeModeRegister: {
case Decoder::MOVE: {
const int destination_mode = (instruction >> 6) & 7;
const int destination_register = (instruction >> 9) & 7;
@ -610,6 +603,9 @@ struct ProcessorStorageConstructor {
continue;
}
const int decrement_action = int(is_long_word_access ? Action::Decrement4 : (is_byte_access ? Action::Decrement1 : Action::Decrement2));
const int increment_action = int(is_long_word_access ? Action::Increment4 : (is_byte_access ? Action::Increment1 : Action::Increment2));
// Construct a single word to describe the addressing mode:
//
// 0xssdd, where ss or dd =
@ -632,85 +628,42 @@ struct ProcessorStorageConstructor {
// 14 = #
//
// ... for no reason other than to make the switch below easy to read.
const int both_modes =
int both_modes =
(combined_mode(source_mode, source_register) << 8) |
combined_mode(destination_mode, destination_register) |
(is_long_word_access ? 0x10000 : 0);
// If the move is to an address register, switch the MOVE to a MOVEA and
// pretend it's to a data register; if the move is from an address register
// then just call it a move from a data register.
if((both_modes & 0xff) == 0x01) {
both_modes &= ~0x00ff;
operation = is_long_word_access ? Operation::MOVEAl : Operation::MOVEAw;
}
if((both_modes & 0xff00) == 0x0100) {
both_modes &= ~0xff00;
}
switch(both_modes) {
//
// Source = Dn or An
// MOVE <ea>, Dn
//
case 0x10001: // MOVEA.l Dn, An
case 0x10101: // MOVEA.l An, An
case 0x00001: // MOVEA.w Dn, An
case 0x00101: // MOVEA.w An, An
operation = is_long_word_access ? Operation::MOVEAl : Operation::MOVEAw; // Substitute MOVEA for MOVE.
case 0x10000: // MOVE.l Dn, Dn
case 0x10100: // MOVE.l An, Dn
case 0x00000: // MOVE.bw Dn, Dn
case 0x00100: // MOVE.bw An, Dn
op(Action::PerformOperation, seq("np"));
op();
break;
case 0x0002: // MOVE Dn, (An)
case 0x0102: // MOVE An, (An)
case 0x0003: // MOVE Dn, (An)+
case 0x0103: // MOVE An, (An)+
op(is_byte_access ? Action::SetMoveFlagsb : Action::SetMoveFlagsw, seq("nw np", { &storage_.address_[destination_register].full }, !is_byte_access));
if(destination_mode == 0x3) {
op(int(is_byte_access ? Action::Increment1 : Action::Increment2) | MicroOp::DestinationMask);
} else {
op();
case 0x10200: // MOVE.l (An), Dn
case 0x10300: // MOVE.l (An)+, Dn
op(int(Action::CopyToEffectiveAddress) | MicroOp::SourceMask, seq("nR nr np", { &storage_.effective_address_[0].full }));
if(source_mode == 0x3) {
op(int(Action::Increment4) | MicroOp::SourceMask);
}
op(Action::PerformOperation);
break;
case 0x0004: // MOVE Dn, -(An)
case 0x0104: // MOVE An, -(An)
op( int(is_byte_access ? Action::Decrement1 : Action::Decrement2) | MicroOp::DestinationMask,
seq("np nw", { &storage_.address_[destination_register].full }, !is_byte_access));
op(is_byte_access ? Action::SetMoveFlagsb : Action::SetMoveFlagsw);
break;
case 0x0005: // MOVE Dn, (d16, An)
case 0x0105: // MOVE An, (d16, An)
op(int(Action::CalcD16An) | MicroOp::DestinationMask, seq("np"));
op(Action::PerformOperation, seq("nw np", { &storage_.effective_address_[1].full }));
op();
break;
case 0x0006: // MOVE Dn, (d8, An, Xn)
case 0x0106: // MOVE An, (d8, An, Xn)
op(int(Action::CalcD8AnXn) | MicroOp::DestinationMask, seq("n np"));
op(Action::PerformOperation, seq("nw np", { &storage_.effective_address_[1].full }));
op();
break;
case 0x0010: // MOVE Dn, (xxx).W
case 0x0110: // MOVE An, (xxx).W
op(int(Action::AssembleWordAddressFromPrefetch) | MicroOp::DestinationMask);
op(Action::PerformOperation, seq("np nw np", { &storage_.effective_address_[1].full }));
op();
break;
case 0x0011: // MOVE Dn, (xxx).L
case 0x0111: // MOVE An, (xxx).L
op(Action::None, seq("np"));
op(int(Action::AssembleLongWordAddressFromPrefetch) | MicroOp::DestinationMask);
op(Action::PerformOperation, seq("np nw np", { &storage_.effective_address_[1].full }));
op();
break;
//
// Source = (An) or (An)+
//
case 0x00201: // MOVEA.w (An), An
case 0x00301: // MOVEA.w (An)+, An
operation = Operation::MOVEAw;
case 0x00200: // MOVE.bw (An), Dn
case 0x00300: // MOVE.bw (An)+, Dn
op(Action::None, seq("nr np", { &storage_.address_[source_register].full }, !is_byte_access));
@ -720,18 +673,109 @@ struct ProcessorStorageConstructor {
op(Action::PerformOperation);
break;
case 0x10201: // MOVEA.l (An), An
case 0x10301: // MOVEA.l (An)+, An
operation = Operation::MOVEAl;
case 0x10200: // MOVE.l (An), Dn
case 0x10300: // MOVE.l (An)+, Dn
op(Action::CopySourceToEffectiveAddress, seq("nR nr np", { &storage_.effective_address_[0].full }));
if(source_mode == 0x3) {
op(int(Action::Increment4) | MicroOp::SourceMask);
}
case 0x10400: // MOVE.l -(An), Dn
op(decrement_action | MicroOp::SourceMask, seq("n nR nr np", { &storage_.address_[source_register].full }));
op(Action::PerformOperation);
break;
case 0x00400: // MOVE.bw -(An), Dn
op(decrement_action | MicroOp::SourceMask, seq("n nr np", { &storage_.address_[source_register].full }, !is_byte_access));
op(Action::PerformOperation);
break;
case 0x10500: // MOVE.l (d16, An), Dn
case 0x10600: // MOVE.l (d8, An, Xn), Dn
case 0x11200: // MOVE.l (d16, PC), Dn
case 0x11300: // MOVE.l (d8, PC, Xn), Dn
op( calc_action_for_mode(both_modes >> 8) | MicroOp::SourceMask,
seq(pseq("np nR nr np", both_modes >> 8), { &storage_.effective_address_[0].full }));
op(Action::PerformOperation);
break;
case 0x00500: // MOVE.bw (d16, An), Dn
case 0x00600: // MOVE.bw (d8, An, Xn), Dn
case 0x01200: // MOVE.bw (d16, PC), Dn
case 0x01300: // MOVE.bw (d8, PC, Xn), Dn
op( calc_action_for_mode(both_modes >> 8) | MicroOp::SourceMask,
seq(pseq("np nr np", both_modes >> 8), { &storage_.effective_address_[0].full },
!is_byte_access));
op(Action::PerformOperation);
break;
case 0x11000: // MOVE.l (xxx).W, Dn
op(
int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nR nr np", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation);
break;
case 0x01000: // MOVE.bw (xxx).W, Dn
op(
int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nr np", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation);
break;
case 0x11100: // MOVE.l (xxx).L, Dn
op(Action::None, seq("np"));
op(int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask, seq("np nR nr", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation, seq("np"));
break;
case 0x01100: // MOVE.bw (xxx).L, Dn
op(Action::None, seq("np"));
op(int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask, seq("np nr", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation, seq("np"));
break;
case 0x11400: // MOVE.l #, Dn
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op(Action::None, seq("np"));
op(int(Action::PerformOperation), seq("np np"));
break;
case 0x01400: // MOVE.bw #, Dn
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op(int(Action::PerformOperation), seq("np np"));
break;
//
// MOVE <ea>, (An)
// MOVE <ea>, (An)+
//
case 0x10002: // MOVE.l Dn, (An)
case 0x10003: // MOVE.l Dn, (An)+
op(int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask);
op(Action::SetMoveFlagsl, seq("nW nw np", { &storage_.effective_address_[1].full }));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x00002: // MOVE.bw Dn, (An)
case 0x00003: // MOVE.bw Dn, (An)+
op(is_byte_access ? Action::SetMoveFlagsb : Action::SetMoveFlagsw, seq("nw np", { &storage_.address_[destination_register].full }, !is_byte_access));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x10202: // MOVE.l (An), (An)
case 0x10302: // MOVE.l (An)+, (An)
case 0x10203: // MOVE.l (An), (An)+
case 0x10303: // MOVE.l (An)+, (An)+
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask | MicroOp::SourceMask,
seq("nR nr", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation, seq("nW nw np", { &storage_.effective_address_[1].full }));
if(source_mode == 0x3 || destination_mode == 0x3) {
op(
increment_action |
(source_mode == 0x3 ? MicroOp::SourceMask : 0) |
(source_mode == 0x3 ? MicroOp::DestinationMask : 0));
}
break;
case 0x00202: // MOVE.bw (An), (An)
case 0x00302: // MOVE.bw (An)+, (An)
case 0x00203: // MOVE.bw (An), (An)+
@ -740,35 +784,188 @@ struct ProcessorStorageConstructor {
op(Action::PerformOperation, seq("nw np", { &storage_.address_[destination_register].full }));
if(source_mode == 0x3 || destination_mode == 0x3) {
op(
int(is_byte_access ? Action::Increment1 : Action::Increment2) |
increment_action |
(source_mode == 0x3 ? MicroOp::SourceMask : 0) |
(source_mode == 0x3 ? MicroOp::DestinationMask : 0));
} else {
op();
}
break;
case 0x10202: // MOVE.l (An), (An)
case 0x10302: // MOVE.l (An)+, (An)
case 0x10203: // MOVE.l (An), (An)+
case 0x10303: // MOVE.l (An)+, (An)+
op(Action::CopyDestinationToEffectiveAddress);
op(Action::CopySourceToEffectiveAddress, seq("nR nr", { &storage_.effective_address_[0].full }));
case 0x10402: // MOVE.l -(An), (An)
case 0x10403: // MOVE.l -(An), (An)+
op(decrement_action | MicroOp::SourceMask);
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask | MicroOp::SourceMask,
seq("n nR nr", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation, seq("nW nw np", { &storage_.effective_address_[1].full }));
if(source_mode == 0x3 || destination_mode == 0x3) {
op(
int(Action::Increment4) |
(source_mode == 0x3 ? MicroOp::SourceMask : 0) |
(source_mode == 0x3 ? MicroOp::DestinationMask : 0));
} else {
op();
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x00402: // MOVE.bw -(An), (An)
case 0x00403: // MOVE.bw -(An), (An)+
op(decrement_action | MicroOp::SourceMask, seq("n nR nr", { &storage_.effective_address_[0].full }));
op(Action::PerformOperation, seq("nW nw np", { &storage_.effective_address_[1].full }));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x10502: // MOVE.bw (d16, An), (An)
case 0x10503: // MOVE.bw (d16, An), (An)+
case 0x10602: // MOVE.bw (d8, An, Xn), (An)
case 0x10603: // MOVE.bw (d8, An, Xn), (An)+
case 0x11202: // MOVE.bw (d16, PC), (An)
case 0x11203: // MOVE.bw (d16, PC), (An)+
case 0x11302: // MOVE.bw (d8, PC, Xn), (An)
case 0x11303: // MOVE.bw (d8, PC, Xn), (An)+
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask);
op( calc_action_for_mode(both_modes >> 8) | MicroOp::SourceMask,
seq(pseq("np nR nr", both_modes >> 8), { &storage_.effective_address_[0].full }));
op( Action::PerformOperation,
seq("nW nw np", { &storage_.effective_address_[1].full }));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x00502: // MOVE.bw (d16, An), (An)
case 0x00503: // MOVE.bw (d16, An), (An)+
case 0x00602: // MOVE.bw (d8, An, Xn), (An)
case 0x00603: // MOVE.bw (d8, An, Xn), (An)+
case 0x01202: // MOVE.bw (d16, PC), (An)
case 0x01203: // MOVE.bw (d16, PC), (An)+
case 0x01302: // MOVE.bw (d8, PC, Xn), (An)
case 0x01303: // MOVE.bw (d8, PC, Xn), (An)+
op( calc_action_for_mode(both_modes >> 8) | MicroOp::SourceMask,
seq(pseq("np nr", both_modes >> 8), { &storage_.effective_address_[0].full },
!is_byte_access));
op( Action::PerformOperation,
seq("nw np", { &storage_.address_[destination_register].full }, !is_byte_access));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x11002: // MOVE.l (xxx).W, (An)
case 0x11003: // MOVE.l (xxx).W, (An)+
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask );
op( int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nR nr", { &storage_.effective_address_[0].full }));
op( Action::PerformOperation,
seq("nW nw np", { &storage_.effective_address_[1].full }));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x01002: // MOVE.bw (xxx).W, (An)
case 0x01003: // MOVE.bw (xxx).W, (An)+
op( int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nr", { &storage_.effective_address_[0].full }, !is_byte_access));
op( Action::PerformOperation,
seq("nw np", { &storage_.address_[destination_register].full }, !is_byte_access));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x11102: // MOVE.l (xxx).l, (An)
case 0x11103: // MOVE.l (xxx).l, (An)+
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask, seq("np") );
op( int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nR nr", { &storage_.effective_address_[0].full }));
op( Action::PerformOperation,
seq("nW nw np", { &storage_.effective_address_[1].full }));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x01102: // MOVE.bw (xxx).l, (An)
case 0x01103: // MOVE.bw (xxx).l, (An)+
op( Action::None, seq("np"));
op( int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nr", { &storage_.effective_address_[0].full }, !is_byte_access));
op( Action::PerformOperation,
seq("nw np", { &storage_.address_[destination_register].full }, !is_byte_access));
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x11402: // MOVE.l #, (An)
case 0x11403: // MOVE.l #, (An)+
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op( int(Action::CopyToEffectiveAddress) | MicroOp::DestinationMask, seq("np") );
op( Action::PerformOperation, seq("np nW nw np", { &storage_.effective_address_[1].full }) );
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
case 0x01402: // MOVE.bw #, (An)
case 0x01403: // MOVE.bw #, (An)+
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op(Action::PerformOperation, seq("np nw np", { &storage_.data_[destination_register].full }, !is_byte_access) );
if(destination_mode == 0x3) {
op(increment_action | MicroOp::DestinationMask);
}
break;
//
// MOVE <ea>, -(An)
//
case 0x0004: // MOVE Dn, -(An)
op( decrement_action | MicroOp::DestinationMask,
seq("np nw", { &storage_.address_[destination_register].full }, !is_byte_access));
op(is_byte_access ? Action::SetMoveFlagsb : Action::SetMoveFlagsw);
break;
case 0x0005: // MOVE Dn, (d16, An)
op(int(Action::CalcD16An) | MicroOp::DestinationMask, seq("np"));
op(Action::PerformOperation, seq("nw np", { &storage_.effective_address_[1].full }));
break;
case 0x0006: // MOVE Dn, (d8, An, Xn)
op(int(Action::CalcD8AnXn) | MicroOp::DestinationMask, seq("n np"));
op(Action::PerformOperation, seq("nw np", { &storage_.effective_address_[1].full }));
break;
case 0x0010: // MOVE Dn, (xxx).W
op(int(Action::AssembleWordAddressFromPrefetch) | MicroOp::DestinationMask);
op(Action::PerformOperation, seq("np nw np", { &storage_.effective_address_[1].full }));
break;
case 0x0011: // MOVE Dn, (xxx).L
op(Action::None, seq("np"));
op(int(Action::AssembleLongWordAddressFromPrefetch) | MicroOp::DestinationMask);
op(Action::PerformOperation, seq("np nw np", { &storage_.effective_address_[1].full }));
break;
case 0x0204: // MOVE (An), -(An)
case 0x0304: // MOVE (An)+, -(An)
// nr np nw
continue;
case 0x0404: // MOVE -(An), -(An)
// n nr np nw
continue;
case 0x0504: // MOVE (d16, An), -(An)
case 0x0604: // MOVE (d8, An, Xn), -(An)
// np nr np nw
// n np nr np nw
continue;
case 0x1004: // MOVE (xxx).W, -(An)
// np nr np nw
continue;
//
// Source = (An) or (An)+
//
case 0x0205: // MOVE (An), (d16, An)
case 0x0305: // MOVE (An)+, (d16, An)
@ -794,22 +991,8 @@ struct ProcessorStorageConstructor {
// Source = -(An)
//
case 0x0401: // MOVEA -(An), An
operation = Operation::MOVEAw; // Substitute MOVEA for MOVE.
case 0x0400: // MOVE -(An), Dn
op( int(is_byte_access ? Action::Decrement1 : Action::Decrement2) | MicroOp::SourceMask,
seq("n nr np", { &storage_.address_[source_register].full }, !is_byte_access));
op(Action::PerformOperation);
break;
case 0x0402: // MOVE -(An), (An)
case 0x0403: // MOVE -(An), (An)+
// n nr nw np
continue;
case 0x0404: // MOVE -(An), -(An)
// n nr np nw
continue;
case 0x0405: // MOVE -(An), (d16, An)
// n nr np nw
@ -831,31 +1014,8 @@ struct ProcessorStorageConstructor {
// Source = (d16, An) or (d8, An, Xn)
//
#define action_calc() int(source_mode == 0x05 ? Action::CalcD16An : Action::CalcD8AnXn)
#define pseq(x) (source_mode == 0x06 ? "n" x : x)
case 0x0501: // MOVE (d16, An), An
case 0x0601: // MOVE (d8, An, Xn), An
operation = Operation::MOVEAw;
case 0x0500: // MOVE (d16, An), Dn
case 0x0600: // MOVE (d8, An, Xn), Dn
op(action_calc() | MicroOp::SourceMask, seq(pseq("np nr np"), { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation);
break;
case 0x0502: // MOVE (d16, An), (An)
case 0x0503: // MOVE (d16, An), (An)+
case 0x0602: // MOVE (d8, An, Xn), (An)
case 0x0603: // MOVE (d8, An, Xn), (An)+
// np nr nw np
// n np nr nw np
continue;
case 0x0504: // MOVE (d16, An), -(An)
case 0x0604: // MOVE (d8, An, Xn), -(An)
// np nr np nw
// n np nr np nw
continue;
case 0x0505: // MOVE (d16, An), (d16, An)
case 0x0605: // MOVE (d8, An, Xn), (d16, An)
@ -881,30 +1041,12 @@ struct ProcessorStorageConstructor {
// n np nr np nw np np
continue;
#undef action_calc
#undef prefix
//
// Source = (xxx).W
//
case 0x1001: // MOVEA (xxx).W, An
operation = Operation::MOVEAw;
case 0x1000: // MOVE (xxx).W, Dn
op(
int(MicroOp::Action::AssembleWordAddressFromPrefetch) | MicroOp::SourceMask,
seq("np nr np", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation);
break;
case 0x1002: // MOVE (xxx).W, (An)
case 0x1003: // MOVE (xxx).W, (An)+
// np nr nw np
continue;
case 0x1004: // MOVE (xxx).W, -(An)
// np nr np nw
continue;
case 0x1005: // MOVE (xxx).W, (d16, An)
// np nr np nw np
@ -926,44 +1068,21 @@ struct ProcessorStorageConstructor {
// Source = (xxx).L
//
case 0x1101: // MOVEA (xxx).L, Dn
operation = Operation::MOVEAw;
case 0x1100: // MOVE (xxx).L, Dn
op(Action::None, seq("np"));
op(int(MicroOp::Action::AssembleLongWordAddressFromPrefetch) | MicroOp::SourceMask, seq("np nr", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation, seq("np"));
op();
break;
//
// Source = (d16, PC)
//
case 0x1200: // MOVE (d16, PC), Dn
op(int(Action::CalcD16PC) | MicroOp::SourceMask, seq("n np nr np", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation);
break;
//
// Source = (d8, An, Xn)
//
case 0x1300: // MOVE (d8, An, Xn), Dn
op(int(Action::CalcD8PCXn) | MicroOp::SourceMask, seq("n np nr np", { &storage_.effective_address_[0].full }, !is_byte_access));
op(Action::PerformOperation);
break;
//
// Source = #
//
case 0x01401: // MOVE #, Dn
operation = Operation::MOVEAw;
case 0x01400: // MOVE #, Dn
storage_.instructions[instruction].source = &storage_.prefetch_queue_;
op(int(Action::PerformOperation), seq("np np"));
op();
break;
case 0x11411: // MOVE.l #, (xxx).l
op(int(Action::None), seq("np"));
@ -1007,6 +1126,11 @@ struct ProcessorStorageConstructor {
continue;
}
// Add a terminating micro operation if necessary.
if(!storage_.all_micro_ops_.back().is_terminal()) {
storage_.all_micro_ops_.emplace_back();
}
// Install the operation and make a note of where micro-ops begin.
storage_.instructions[instruction].operation = operation;
micro_op_pointers[instruction] = micro_op_start;
@ -1019,6 +1143,7 @@ struct ProcessorStorageConstructor {
#undef seq
#undef op
#undef pseq
// Finalise micro-op and program pointers.
for(size_t instruction = 0; instruction < 65536; ++instruction) {
@ -1079,3 +1204,4 @@ void CPU::MC68000::ProcessorStorage::set_is_supervisor(bool is_supervisor) {
address_[7] = stack_pointers_[is_supervisor_];
}
}

9
Processors/68000/Implementation/68000Storage.hpp
View File

@ -45,7 +45,7 @@ class ProcessorStorage {
ABCD, SBCD,
ADD, AND, EOR, OR, SUB,
MOVEb, MOVEw, MOVEl,
MOVEb, MOVEw, MOVEl, MOVEq,
MOVEAw, MOVEAl,
MOVEtoSR, MOVEfromSR,
@ -137,11 +137,8 @@ class ProcessorStorage {
/// Adds 4.
Increment4,
/// Copies whatever is this instruction's source to effective_address_[0].
CopySourceToEffectiveAddress,
/// Copies whatever is this instruction's destination to effective_address_[1].
CopyDestinationToEffectiveAddress,
/// Copies the source and/or destination to effective_address_.
CopyToEffectiveAddress,
/// Peeking into the end of the prefetch queue, calculates the proper target of (d16,An) addressing.
CalcD16An,