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SPU LLVM: improve SHUFB with constant mask

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This commit is contained in:
Nekotekina 2018-07-05 15:34:11 +03:00
parent 622f2f7f66
commit 253e8b4466
1 changed files with 82 additions and 0 deletions
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82
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -3870,6 +3870,88 @@ public:
void SHUFB(spu_opcode_t op)
{
const auto c = get_vr<u8[16]>(op.rc);
if (auto ci = llvm::dyn_cast<llvm::Constant>(c.value))
{
// Optimization: SHUFB with constant mask
v128 mask = get_const_vector(ci, m_pos, 57216);
if (((mask._u64[0] | mask._u64[1]) & 0xe0e0e0e0e0e0e0e0) == 0)
{
// Trivial insert or constant shuffle (TODO)
static constexpr struct mask_info
{
u64 i1;
u64 i0;
decltype(&cpu_translator::get_type<void>) type;
u64 extract_from;
u64 insert_to;
} s_masks[30]
{
{ 0x0311121314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 15 },
{ 0x1003121314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 14 },
{ 0x1011031314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 13 },
{ 0x1011120314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 12 },
{ 0x1011121303151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 11 },
{ 0x1011121314031617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 10 },
{ 0x1011121314150317, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 9 },
{ 0x1011121314151603, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 8 },
{ 0x1011121314151617, 0x03191a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 7 },
{ 0x1011121314151617, 0x18031a1b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 6 },
{ 0x1011121314151617, 0x1819031b1c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 5 },
{ 0x1011121314151617, 0x18191a031c1d1e1f, &cpu_translator::get_type<u8[16]>, 12, 4 },
{ 0x1011121314151617, 0x18191a1b031d1e1f, &cpu_translator::get_type<u8[16]>, 12, 3 },
{ 0x1011121314151617, 0x18191a1b1c031e1f, &cpu_translator::get_type<u8[16]>, 12, 2 },
{ 0x1011121314151617, 0x18191a1b1c1d031f, &cpu_translator::get_type<u8[16]>, 12, 1 },
{ 0x1011121314151617, 0x18191a1b1c1d1e03, &cpu_translator::get_type<u8[16]>, 12, 0 },
{ 0x0203121314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 7 },
{ 0x1011020314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 6 },
{ 0x1011121302031617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 5 },
{ 0x1011121314150203, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 4 },
{ 0x1011121314151617, 0x02031a1b1c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 3 },
{ 0x1011121314151617, 0x181902031c1d1e1f, &cpu_translator::get_type<u16[8]>, 6, 2 },
{ 0x1011121314151617, 0x18191a1b02031e1f, &cpu_translator::get_type<u16[8]>, 6, 1 },
{ 0x1011121314151617, 0x18191a1b1c1d0203, &cpu_translator::get_type<u16[8]>, 6, 0 },
{ 0x0001020314151617, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u32[4]>, 3, 3 },
{ 0x1011121300010203, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u32[4]>, 3, 2 },
{ 0x1011121314151617, 0x000102031c1d1e1f, &cpu_translator::get_type<u32[4]>, 3, 1 },
{ 0x1011121314151617, 0x18191a1b00010203, &cpu_translator::get_type<u32[4]>, 3, 0 },
{ 0x0001020304050607, 0x18191a1b1c1d1e1f, &cpu_translator::get_type<u64[2]>, 1, 1 },
{ 0x1011121303151617, 0x0001020304050607, &cpu_translator::get_type<u64[2]>, 1, 0 },
};
// Check important constants from CWD-like constant generation instructions
for (const auto& cm : s_masks)
{
if (mask._u64[0] == cm.i0 && mask._u64[1] == cm.i1)
{
const auto t = (this->*cm.type)();
const auto a = get_vr(op.ra, t);
const auto b = get_vr(op.rb, t);
const auto e = m_ir->CreateExtractElement(a, cm.extract_from);
set_vr(op.rt4, m_ir->CreateInsertElement(b, e, cm.insert_to));
return;
}
}
// Generic constant shuffle without constant-generation bits
mask = mask ^ v128::from8p(0x1f);
if (op.ra == op.rb)
{
mask = mask & v128::from8p(0xf);
}
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
const auto c = make_const_vector(mask, get_type<u8[16]>());
set_vr(op.rt4, m_ir->CreateShuffleVector(b.value, op.ra == op.rb ? b.value : a.value, m_ir->CreateZExt(c, get_type<u32[16]>())));
return;
}
LOG_TODO(SPU, "[0x%x] Const SHUFB mask: %s", m_pos, mask);
}
const auto x = avg(sext<u8[16]>((c & 0xc0) == 0xc0), sext<u8[16]>((c & 0xe0) == 0xc0));
const auto cr = c ^ 0xf;
const auto a = pshufb(get_vr<u8[16]>(op.ra), cr);