mirror/rpcs3
1
0
Fork 0
mirror of https://github.com/RPCS3/rpcs3.git synced 2024-11-16 23:17:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

SPU LLVM: Optimize common SFI+ROTQMBY pattern

Browse Source
This commit is contained in:
Whatcookie 2023-07-28 03:26:40 -04:00 committed by GitHub
parent 375bc4cc69
commit 4ecb06c901
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 11 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
rpcs3/Emu/Cell/SPURecompiler.cpp
View File

@ -7788,19 +7788,27 @@ public:
void ROTQMBY(spu_opcode_t op)
{
const auto a = get_vr<u8[16]>(op.ra);
const auto b = get_vr<u8[16]>(op.rb);
const auto b = get_vr<u32[4]>(op.rb);
auto minusb = eval(-b);
if (auto [ok, x] = match_expr(b, -match<u32[4]>()); ok)
{
minusb = eval(x);
}
const auto minusbx = bitcast<u8[16]>(minusb);
// 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);
const auto sh = sc - (splat_scalar(minusbx) & 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);
const auto sh = sc + (splat_scalar(minusbx) & 0x1f);
set_vr(op.rt, pshufb(a, sh));
}