diff options
Diffstat (limited to 'trunk/src/emu/cpu/dsp56k/opcode.c')
-rw-r--r-- | trunk/src/emu/cpu/dsp56k/opcode.c | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/trunk/src/emu/cpu/dsp56k/opcode.c b/trunk/src/emu/cpu/dsp56k/opcode.c new file mode 100644 index 00000000000..0e9ad3706dc --- /dev/null +++ b/trunk/src/emu/cpu/dsp56k/opcode.c @@ -0,0 +1,81 @@ +#include <stdio.h> + +#include "opcode.h" + +namespace DSP56K +{ + +Opcode::Opcode(UINT16 w0, UINT16 w1) : m_word0(w0), m_word1(w1) +{ + m_instruction = Instruction::decodeInstruction(this, w0, w1); + m_parallelMove = ParallelMove::decodeParallelMove(this, w0, w1); +} + + +Opcode::~Opcode() +{ + global_free(m_instruction); + global_free(m_parallelMove); +} + + +astring Opcode::disassemble() const +{ + // Duck out early if there isn't a valid op + if (!m_instruction) + return dcString(); + + // Duck out if either has had an explicit error. + if (m_instruction && !m_instruction->valid()) + return dcString(); + if (m_parallelMove && !m_parallelMove->valid()) + return dcString(); + + // Disassemble what you can. + astring opString = ""; + astring pmString = ""; + if (m_instruction) m_instruction->disassemble(opString); + if (m_parallelMove) m_parallelMove->disassemble(pmString); + + return opString + " " + pmString; +} + + +void Opcode::evaluate(dsp56k_core* cpustate) const +{ + if (m_instruction) m_instruction->evaluate(cpustate); + if (m_parallelMove) m_parallelMove->evaluate(); +} + + +size_t Opcode::size() const +{ + if (m_instruction && m_instruction->valid()) + return m_instruction->size() + m_instruction->sizeIncrement(); + + // Opcode failed to decode, so push it past dc + return 1; +} + +size_t Opcode::evalSize() const +{ + if (m_instruction && m_instruction->valid()) + return m_instruction->evalSize(); // Probably doesn't matter : + m_instruction->sizeIncrement(); + + // Opcode failed to decode, so push it past dc + return 1; +} + + +const reg_id& Opcode::instSource() const { return m_instruction->source(); } +const reg_id& Opcode::instDestination() const { return m_instruction->destination(); } +const size_t Opcode::instAccumulatorBitsModified() const { return m_instruction->accumulatorBitsModified(); } + +astring Opcode::dcString() const +{ + char tempStr[1024]; + sprintf(tempStr, "dc $%x", m_word0); + return astring(tempStr); +} + +} |