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

These `MOV`->`DUP` splats can just be a singular `MOVI` instruction
This commit is contained in:
Wunkolo 2024-06-12 14:32:36 -07:00
parent 2953e2e6fc
commit 3acd0a3c37
1 changed files with 6 additions and 12 deletions
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18
src/xenia/cpu/backend/a64/a64_seq_vector.cc
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@ -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