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SPU LLVM: detect mpy32 pattern

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This commit is contained in:
Nekotekina 2019-11-23 19:31:42 +03:00
parent e735346d26
commit 4caf747729
1 changed files with 30 additions and 2 deletions
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32
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -6110,6 +6110,18 @@ public:
// Check SPUInterpreter for notes.
}
template <typename TA, typename TB>
static auto mpyh(TA&& a, TB&& b)
{
return (std::forward<TA>(a) >> 16) * (std::forward<TB>(b) << 16);
}
template <typename TA, typename TB>
static auto mpyu(TA&& a, TB&& b)
{
return (std::forward<TA>(a) << 16 >> 16) * (std::forward<TB>(b) << 16 >> 16);
}
void SF(spu_opcode_t op)
{
set_vr(op.rt, get_vr(op.rb) - get_vr(op.ra));
@ -6268,6 +6280,22 @@ public:
void A(spu_opcode_t op)
{
if (auto [a, b] = match_vrs<u32[4]>(op.ra, op.rb); a && b)
{
static const auto MP = match<u32[4]>();
if (auto [ok, a0, b0, b1, a1] = match_expr(a, mpyh(MP, MP) + mpyh(MP, MP)); ok)
{
if (auto [ok, a2, b2] = match_expr(b, mpyu(MP, MP)); ok && a2.eq(a0, a1) && b2.eq(b0, b1))
{
// 32-bit multiplication
LOG_NOTICE(SPU, "mpy32 in %s at 0x%05x", m_hash, m_pos);
set_vr(op.rt, a0 * b0);
return;
}
}
}
set_vr(op.rt, get_vr(op.ra) + get_vr(op.rb));
}
@ -6729,7 +6757,7 @@ public:
void MPYH(spu_opcode_t op)
{
set_vr(op.rt, (get_vr(op.ra) >> 16) * (get_vr(op.rb) << 16));
set_vr(op.rt, mpyh(get_vr(op.ra), get_vr(op.rb)));
}
void MPYHH(spu_opcode_t op)
@ -6749,7 +6777,7 @@ public:
void MPYU(spu_opcode_t op)
{
set_vr(op.rt, (get_vr(op.ra) << 16 >> 16) * (get_vr(op.rb) << 16 >> 16));
set_vr(op.rt, mpyu(get_vr(op.ra), get_vr(op.rb)));
}
void CEQB(spu_opcode_t op)