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SPU LLVM: add alternative ROTQBY implementation

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Used if SSSE3 is not available (exec_rotqby).
This commit is contained in:
Nekotekina 2020-04-04 15:34:13 +03:00
parent 7f9d41ac47
commit a53d0d50b3
2 changed files with 26 additions and 0 deletions
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11
rpcs3/Emu/CPU/CPUTranslator.h
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@ -2842,6 +2842,17 @@ struct fmt_unveil<llvm::TypeSize, void>
}
};
#ifndef _MSC_VER
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wignored-attributes"
#endif
template <>
inline llvm::Type* cpu_translator::get_type<__m128i>()
{
return llvm::VectorType::get(llvm::Type::getInt8Ty(m_context), 16);
}
#ifndef _MSC_VER
#pragma GCC diagnostic pop
#endif

15
rpcs3/Emu/Cell/SPURecompiler.cpp
View File

@ -6462,10 +6462,25 @@ public:
set_vr(op.rt, fshl(a, zshuffle(a, 4, 0, 1, 2), b));
}
static __m128i exec_rotqby(__m128i a, u8 b)
{
alignas(32) const __m128i buf[2]{a, a};
return _mm_loadu_si128(reinterpret_cast<const __m128i*>(reinterpret_cast<const u8*>(buf) + (16 - (b & 0xf))));
}
void ROTQBY(spu_opcode_t op)
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
if (!m_use_ssse3)
{
value_t<u8[16]> r;
r.value = call("spu_rotqby", &exec_rotqby, a.value, eval(extract(b, 12)).value);
set_vr(op.rt, r);
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 - zshuffle(b, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12)) & 0xf);
set_vr(op.rt, pshufb(a, sh));