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SPU LLVM: implement SQRT and DIV pattern detection (xf)

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This commit is contained in:
Nekotekina 2021-09-13 21:56:01 +03:00
parent d28b0ba2fa
commit 9e62ca562b
1 changed files with 69 additions and 1 deletions
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70
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -7354,6 +7354,39 @@ public:
if constexpr (std::extent_v<VT> == 4) // u32[4]
{
// Match division (adjusted) (TODO)
if (auto a = match_vr<f32[4]>(op.ra))
{
static const auto MT = match<f32[4]>();
if (auto [div_ok, diva, divb] = match_expr(a, MT / MT); div_ok)
{
if (auto b = match_vr<s32[4]>(op.rb))
{
if (auto [add1_ok] = match_expr(b, bitcast<s32[4]>(a) + splat<s32[4]>(1)); add1_ok)
{
if (auto [fm_ok, a1, b1] = match_expr(x, bitcast<s32[4]>(fm(MT, MT)) > splat<s32[4]>(-1)); fm_ok)
{
if (auto [fnma_ok] = match_expr(a1, fnms(divb, bitcast<f32[4]>(b), diva)); fnma_ok)
{
if (fabs(b1).eval(m_ir) == fsplat<f32[4]>(1.0).eval(m_ir))
{
set_vr(op.rt4, diva / divb);
return true;
}
if (auto [sel_ok] = match_expr(b1, bitcast<f32[4]>((bitcast<u32[4]>(diva) & 0x80000000) | 0x3f800000)); sel_ok)
{
set_vr(op.rt4, diva / divb);
return true;
}
}
}
}
}
}
}
if (auto [a, b] = match_vrs<f64[4]>(op.ra, op.rb); a || b)
{
set_vr(op.rt4, select(x, get_vr<f64[4]>(op.rb), get_vr<f64[4]>(op.ra)));
@ -8449,7 +8482,42 @@ public:
}
});
set_vr(op.rt4, fma(get_vr<f32[4]>(op.ra), get_vr<f32[4]>(op.rb), get_vr<f32[4]>(op.rc)));
const auto [a, b, c] = get_vrs<f32[4]>(op.ra, op.rb, op.rc);
static const auto MT = match<f32[4]>();
// Match sqrt
if (auto [ok_fnma, a1, b1] = match_expr(a, fnms(MT, MT, fsplat<f32[4]>(1.00000011920928955078125))); ok_fnma)
{
if (auto [ok_fm2, a2] = match_expr(b, fm(MT, fsplat<f32[4]>(0.5))); ok_fm2 && a2.eq(b1))
{
if (auto [ok_fm1, a3, b3] = match_expr(c, fm(MT, MT)); ok_fm1 && a3.eq(a1))
{
if (auto [ok_sqrte, src] = match_expr(a3, spu_rsqrte(MT)); ok_sqrte && src.eq(b3))
{
erase_stores(a, b, c, a3);
set_vr(op.rt4, fsqrt(fabs(src)));
return;
}
}
}
}
// Match division (fast)
if (auto [ok_fnma, divb, diva] = match_expr(a, fnms(c, MT, MT)); ok_fnma)
{
if (auto [ok_fm] = match_expr(c, fm(diva, b)); ok_fm)
{
if (auto [ok_re] = match_expr(b, spu_re(divb)); ok_re)
{
erase_stores(b, c);
set_vr(op.rt4, diva / divb);
return;
}
}
}
set_vr(op.rt4, fma(a, b, c));
}
template <typename T, typename U, typename V>