SPU LLVM: Minor SUMB AVX-512 path optimization

- Tweak shuffle to allow LLVM to emit a cheap blend instruction instead of the expensive VPERMI2W instruction
RPCS3 · Jan 27, 2023 · 813f7b5 · 813f7b5
1 parent 6532d2b
commit 813f7b5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/rpcs3/Emu/Cell/SPURecompiler.cpp b/rpcs3/Emu/Cell/SPURecompiler.cpp
@@ -7709,7 +7709,7 @@ class spu_llvm_recompiler : public spu_recompiler_base, public cpu_translator
 
 			const auto ax = vdbpsadbw(a, zeroes, 0);
 			const auto bx = vdbpsadbw(b, zeroes, 0);
-			set_vr(op.rt, shuffle2(ax, bx, 0, 8, 2, 10, 4, 12, 6, 14));
+			set_vr(op.rt, shuffle2(ax, bx, 0, 9, 2, 11, 4, 13, 6, 15));
 			return;
 		}