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[SPU ASMJIT] SSE2 Vectorized ROTH

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Add vectorized 16-bit left rotate using power of two multiply. SSE2 compatible.

Also added AVX512-ICL rotate via funnel shift.
This commit is contained in:
Walter 2026-06-18 12:31:08 +10:00
parent 6a15f9dc8e
commit ca22cd6b99
1 changed files with 31 additions and 11 deletions
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42
rpcs3/Emu/Cell/SPUASMJITRecompiler.cpp
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@ -1863,10 +1863,18 @@ void spu_recompiler::SHL(spu_opcode_t op)
void spu_recompiler::ROTH(spu_opcode_t op) //nf
{
const XmmLink& va = XmmGet(op.ra, XmmType::Int);
const XmmLink& vb = XmmGet(op.rb, XmmType::Int);
if (utils::has_avx512_icl())
{
c->vpshldvw(va, va, vb);
c->vmovdqa(SPU_OFF_128(gpr, op.rt), va);
return;
}
if (utils::has_avx512())
{
const XmmLink& va = XmmGet(op.ra, XmmType::Int);
const XmmLink& vb = XmmGet(op.rb, XmmType::Int);
const XmmLink& vt = XmmAlloc();
const XmmLink& v4 = XmmAlloc();
c->vmovdqa(v4, XmmConst(v128::from32r(0x0d0c0d0c, 0x09080908, 0x05040504, 0x01000100)));
@ -1883,21 +1891,33 @@ void spu_recompiler::ROTH(spu_opcode_t op) //nf
if (utils::has_xop())
{
const XmmLink& va = XmmGet(op.ra, XmmType::Int);
const XmmLink& vb = XmmGet(op.rb, XmmType::Int);
const XmmLink& vt = XmmAlloc();
c->vprotw(vt, va, vb);
c->movdqa(SPU_OFF_128(gpr, op.rt), vt);
return;
}
for (u32 i = 0; i < 8; i++) // unrolled loop
{
c->movzx(qw0->r32(), SPU_OFF_16(gpr, op.ra, &v128::_u16, i));
c->movzx(asmjit::x86::ecx, SPU_OFF_16(gpr, op.rb, &v128::_u16, i));
c->rol(qw0->r16(), asmjit::x86::cl);
c->mov(SPU_OFF_16(gpr, op.rt, &v128::_u16, i), qw0->r16());
}
// Turn shift amount into power of 2 using a float's exponent
// Calculating a negative power makes truncation cheaper
const XmmLink& v1 = XmmAlloc();
const XmmLink& v2 = XmmAlloc();
c->psllw(vb, 12);
c->psrlw(vb, 5);
c->paddw(vb, XmmConst(v128::from16p(std::bit_cast<uint32_t>(-1.0f) >> 16)));
c->pxor(v1, v1);
c->pxor(v2, v2);
c->punpcklwd(v1, vb); // "shifts" the amount into the exponent
c->punpckhwd(v2, vb);
c->cvttps2dq(v1, v1);
c->cvttps2dq(v2, v2);
c->packssdw(v1, v2); // positive power (1<<15) would have saturated
c->pxor(vb, vb);
c->psubw(vb, v1);
c->movdqa(v2, va);
c->pmullw(v2, vb);
c->pmulhuw(va, vb);
c->por(va, v2);
c->vmovdqa(SPU_OFF_128(gpr, op.rt), va);
}
void spu_recompiler::ROTHM(spu_opcode_t op)