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SPU LLVM: Expand byteswap elimination to more instructions

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This commit is contained in:
Malcolm Jestadt 2021-08-28 20:54:18 -04:00 committed by Ivan
parent ae491f04a1
commit a86b278115
1 changed files with 48 additions and 4 deletions
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52
rpcs3/Emu/Cell/SPURecompiler.cpp
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@ -6696,16 +6696,40 @@ public:
void ROTQMBYBI(spu_opcode_t op)
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
// Data with swapped endian from a load instruction
if (auto [ok, as] = match_expr(a, byteswap(match<u8[16]>())); ok)
{
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(b) >> 3) & 0x1f);
set_vr(op.rt, pshufb(as, sh));
return;
}
const auto sc = build<u8[16]>(112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127);
const auto sh = sc + (-(splat_scalar(get_vr<u8[16]>(op.rb)) >> 3) & 0x1f);
set_vr(op.rt, pshufb(get_vr<u8[16]>(op.ra), sh));
const auto sh = sc + (-(splat_scalar(b) >> 3) & 0x1f);
set_vr(op.rt, pshufb(a, sh));
}
void SHLQBYBI(spu_opcode_t op)
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
// Data with swapped endian from a load instruction
if (auto [ok, as] = match_expr(a, byteswap(match<u8[16]>())); ok)
{
const auto sc = build<u8[16]>(127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112);
const auto sh = sc + (splat_scalar(b) >> 3);
set_vr(op.rt, pshufb(as, 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);
set_vr(op.rt, pshufb(get_vr<u8[16]>(op.ra), sh));
const auto sh = sc - (splat_scalar(b) >> 3);
set_vr(op.rt, pshufb(a, sh));
}
template <typename RT, typename T>
@ -6841,6 +6865,16 @@ public:
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
// Data with swapped endian from a load instruction
if (auto [ok, as] = match_expr(a, byteswap(match<u8[16]>())); ok)
{
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(b) & 0x1f);
set_vr(op.rt, pshufb(as, sh));
return;
}
const auto sc = build<u8[16]>(112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127);
const auto sh = sc + (-splat_scalar(b) & 0x1f);
set_vr(op.rt, pshufb(a, sh));
@ -6850,6 +6884,16 @@ public:
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
// Data with swapped endian from a load instruction
if (auto [ok, as] = match_expr(a, byteswap(match<u8[16]>())); ok)
{
const auto sc = build<u8[16]>(127, 126, 125, 124, 123, 122, 121, 120, 119, 118, 117, 116, 115, 114, 113, 112);
const auto sh = sc + (splat_scalar(b) & 0x1f);
set_vr(op.rt, pshufb(as, 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(b) & 0x1f);
set_vr(op.rt, pshufb(a, sh));