[a64] Replace instances of MOV+DUP-splats to MOVI`

These `MOV`->`DUP` splats can just be a singular `MOVI` instruction
xenia-project · Jun 23, 2024 · 3acd0a3 · 3acd0a3
1 parent 2953e2e
commit 3acd0a3
Showing 1 changed file with 6 additions and 12 deletions.
diff --git a/src/xenia/cpu/backend/a64/a64_seq_vector.cc b/src/xenia/cpu/backend/a64/a64_seq_vector.cc
@@ -1138,13 +1138,11 @@ struct PERMUTE_V128
     }
 
     // Indices must be endian-swapped
-    e.MOV(W0, 0b11);
-    e.DUP(Q1.B16(), W0);
+    e.MOVI(Q1.B16(), 0b11);
     e.EOR(indices.B16(), indices.B16(), Q1.B16());
 
     // Modulo 32 the indices
-    e.MOV(W0, 0b0001'1111);
-    e.DUP(Q1.B16(), W0);
+    e.MOVI(Q1.B16(), 0b0001'1111);
     e.AND(indices.B16(), indices.B16(), Q1.B16());
 
     // Table-registers must be sequential indices
@@ -1186,22 +1184,18 @@ struct PERMUTE_V128
     }
 
     // Indices must be endian-swapped
-    e.MOV(W0, 0b1);
-    e.DUP(Q1.H8(), W0);
+    e.MOVI(Q1.H8(), 0b1);
     e.EOR(indices.B16(), indices.B16(), Q1.B16());
 
     // Modulo-16 the indices
-    e.MOV(W0, 0b0000'1111);
-    e.DUP(Q1.H8(), W0);
+    e.MOVI(Q1.H8(), 0b0000'1111);
     e.AND(indices.B16(), indices.B16(), Q1.B16());
 
     // Convert int16 indices into int8
-    e.MOV(W0, 0x02'02);
-    e.DUP(Q1.H8(), W0);
+    e.MOVI(Q1.B16(), 0x02);
     e.MUL(indices.H8(), indices.H8(), Q1.H8());
 
-    e.MOV(W0, 0x01'00);
-    e.DUP(Q1.H8(), W0);
+    e.MOVI(Q1.H8(), 0x01, LSL, 8);
     e.ADD(indices.H8(), indices.H8(), Q1.H8());
 
     // Table-registers must be sequential indices