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SPU LLVM Precompilation

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Implement function SPU function discovery in images or random SPU code
This commit is contained in:
Eladash 2023-08-26 11:23:42 +03:00 • committed by Elad Ashkenazi
parent 290ff5b839
commit b5faf5800b
12 changed files with 352 additions and 22 deletions
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59
rpcs3/Emu/Cell/SPUThread.cpp
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@ -487,7 +487,27 @@ std::array<u32, 2> op_branch_targets(u32 pc, spu_opcode_t op)
case spu_itype::BRASL:
{
const int index = (type == spu_itype::BR || type == spu_itype::BRA || type == spu_itype::BRSL || type == spu_itype::BRASL ? 0 : 1);
// if (type == spu_itype::BRASL || type == spu_itype::BRA)
// {
// res[index] = spu_branch_target(0, op.i16);
// }
// else
// {
// // Treat i16 as signed, this allows the caller to detect "overflows" and "underflows" in address in order to detect invalid branches
// // Example:
// // [0x3fffc] BR +4 -> BR 0 -> invalid
// // [0x3fffc] BR 0x3fff4 -> BR 0 -> invalid
// const u32 add = static_cast<s16>(op.si16);
// }
res[index] = (spu_branch_target(type == spu_itype::BRASL || type == spu_itype::BRA ? 0 : pc, op.i16));
if (res[0] == res[1])
{
res[1] = umax;
}
break;
}
case spu_itype::IRET:
@ -4013,7 +4033,7 @@ bool spu_thread::check_mfc_interrupts(u32 next_pc)
return false;
}
bool spu_thread::is_exec_code(u32 addr, const u8* ls_ptr)
bool spu_thread::is_exec_code(u32 addr, const void* ls_ptr)
{
if (addr & ~0x3FFFC)
{
@ -4022,8 +4042,8 @@ bool spu_thread::is_exec_code(u32 addr, const u8* ls_ptr)
for (u32 i = 0; i < 30; i++)
{
const u32 addr0 = addr + (i * 4);
const u32 op = read_from_ptr<be_t<u32>>(ls_ptr + addr0);
const u32 addr0 = spu_branch_target(addr);
const u32 op = read_from_ptr<be_t<u32>>(static_cast<const u8*>(ls_ptr) + addr0);
const auto type = s_spu_itype.decode(op);
if (type == spu_itype::UNK || !op)
@ -4033,9 +4053,38 @@ bool spu_thread::is_exec_code(u32 addr, const u8* ls_ptr)
if (type & spu_itype::branch)
{
// TODO
break;
const auto results = op_branch_targets(addr, spu_opcode_t{op});
if (results[0] == umax)
{
break;
}
for (usz res_i = 1; res_i < results.size(); res_i++)
{
const u32 route_pc = results[res_i];
if (route_pc >= SPU_LS_SIZE)
{
continue;
}
// Test the validity of a single instruction of the optional target
// This function can't be too slow and is unlikely to improve results by a great deal
const u32 op0 = read_from_ptr<be_t<u32>>(static_cast<const u8*>(ls_ptr) + route_pc);
const auto type0 = s_spu_itype.decode(op);
if (type == spu_itype::UNK || !op)
{
return false;
}
}
addr = spu_branch_target(results[0]);
continue;
}
addr += 4;
}
return true;