natto1784/matar
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bus (feat): add cycle accuracy

Browse Source 
Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2024-06-15 03:49:10 +05:30
parent cb75ebf8ef
commit c22333812e
9 changed files with 657 additions and 108 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/cpu/cpu.cc
View File

@@ -129,11 +129,10 @@ Cpu::step() {
// word align
rst_bit(pc, 1);
uint32_t next_opcode = bus->read_word(pc);
arm::Instruction instruction(opcodes[0]);
opcodes[0] = opcodes[1];
opcodes[1] = next_opcode;
opcodes[1] = bus->read_word(pc, sequential);
#ifdef DISASSEMBLER
glogger.info("0x{:08X} : {}",
@@ -149,11 +148,10 @@ Cpu::step() {
} else
advance_pc_arm();
} else {
uint32_t next_opcode = bus->read_halfword(pc);
thumb::Instruction instruction(opcodes[0]);
opcodes[0] = opcodes[1];
opcodes[1] = next_opcode;
opcodes[1] = bus->read_halfword(pc, sequential);
#ifdef DISASSEMBLER
glogger.info("0x{:08X} : {}",
@@ -162,6 +160,7 @@ Cpu::step() {
#endif
instruction.exec(*this);
if (is_flushed) {
flush_pipeline();
is_flushed = false;