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SPU LLVM: Optimize ROTQBY family for VBMI

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- Avoid masking pshufb index by 0xf by using vpermb instead.
- Also fix conversion of vperm2b index to ShuffleVector index.
This commit is contained in:
Malcolm Jestadt 2021-01-24 00:36:39 -05:00 • committed by Ivan
parent 8480674708
commit 486d48e4f8
2 changed files with 87 additions and 10 deletions
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45
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -6521,14 +6521,27 @@ public:
{
const auto as = byteswap(a);
const auto sc = build<u8[16]>(15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
const auto sh = (sc + (splat_scalar(get_vr<u8[16]>(op.rb)) >> 3)) & 0xf;
set_vr(op.rt, pshufb(as, sh));
const auto sh = sc + (splat_scalar(get_vr<u8[16]>(op.rb)) >> 3);
if (m_use_avx512_icl)
{
set_vr(op.rt, vpermb(as, sh));
return;
}
set_vr(op.rt, pshufb(as, (sh & 0xf)));
return;
}
const auto sc = build<u8[16]>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
const auto sh = sc - (splat_scalar(get_vr<u8[16]>(op.rb)) >> 3);
if (m_use_avx512_icl)
{
set_vr(op.rt, vpermb(a, sh));
return;
}
const auto sc = build<u8[16]>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
const auto sh = (sc - (splat_scalar(get_vr<u8[16]>(op.rb)) >> 3)) & 0xf;
set_vr(op.rt, pshufb(a, sh));
set_vr(op.rt, pshufb(a, (sh & 0xf)));
}
void ROTQMBYBI(spu_opcode_t op)
@ -6651,14 +6664,28 @@ public:
{
const auto as = byteswap(a);
const auto sc = build<u8[16]>(15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
const auto sh = eval((sc + splat_scalar(b)) & 0xf);
set_vr(op.rt, pshufb(as, sh));
const auto sh = eval(sc + splat_scalar(b));
if (m_use_avx512_icl)
{
set_vr(op.rt, vpermb(as, sh));
return;
}
set_vr(op.rt, pshufb(as, (sh & 0xf)));
return;
}
const auto sc = build<u8[16]>(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15);
const auto sh = eval((sc - splat_scalar(b)) & 0xf);
set_vr(op.rt, pshufb(a, sh));
const auto sh = eval(sc - splat_scalar(b));
if (m_use_avx512_icl)
{
set_vr(op.rt, vpermb(a, sh));
return;
}
set_vr(op.rt, pshufb(a, (sh & 0xf)));
}
void ROTQMBY(spu_opcode_t op)