[PULL 04/17] target/mips: Convert Octeon LX instructions to decodetree

[Philippe Mathieu-Daudé]

Use Octeon decodetree to call gen_lx() for the LX instructions.

Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
Reviewed-by: Pavel Dovgalyuk <pavel.dovgal...@ispras.ru>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Message-Id: <20241111222936.59869-4-phi...@linaro.org>
---
 target/mips/tcg/octeon.decode      |  8 ++++++++
 target/mips/tcg/octeon_translate.c | 12 ++++++++++++
 target/mips/tcg/translate.c        |  4 +---
 3 files changed, 21 insertions(+), 3 deletions(-)

diff --git a/target/mips/tcg/octeon.decode b/target/mips/tcg/octeon.decode
index 0c787cb498c..102a05860df 100644
--- a/target/mips/tcg/octeon.decode
+++ b/target/mips/tcg/octeon.decode
@@ -1,6 +1,7 @@
 # Octeon Architecture Module instruction set
 #
 # Copyright (C) 2022 Pavel Dovgalyuk
+# Copyright (C) 2024 Philippe Mathieu-Daudé
 #
 # SPDX-License-Identifier: LGPL-2.1-or-later
 #
@@ -39,3 +40,10 @@ CINS         011100 ..... ..... ..... ..... 11001 . @bitfield
 POP          011100 rs:5 00000 rd:5 00000 10110 dw:1
 SEQNE        011100 rs:5 rt:5 rd:5 00000 10101 ne:1
 SEQNEI       011100 rs:5 rt:5 imm:s10 10111 ne:1
+
+&lx          base index rd
+@lx          ...... base:5 index:5 rd:5 ...... ..... &lx
+LWX          011111 ..... ..... ..... 00000 001010 @lx
+LHX          011111 ..... ..... ..... 00100 001010 @lx
+LBUX         011111 ..... ..... ..... 00110 001010 @lx
+LDX          011111 ..... ..... ..... 01000 001010 @lx
diff --git a/target/mips/tcg/octeon_translate.c 
b/target/mips/tcg/octeon_translate.c
index d9eb43716e2..b2eca29e06c 100644
--- a/target/mips/tcg/octeon_translate.c
+++ b/target/mips/tcg/octeon_translate.c
@@ -174,3 +174,15 @@ static bool trans_SEQNEI(DisasContext *ctx, arg_SEQNEI *a)
     }
     return true;
 }
+
+static bool trans_lx(DisasContext *ctx, arg_lx *a, MemOp mop)
+{
+    gen_lx(ctx, a->rd, a->base, a->index, mop);
+
+    return true;
+}
+
+TRANS(LBUX, trans_lx, MO_UB);
+TRANS(LHX,  trans_lx, MO_SW);
+TRANS(LWX,  trans_lx, MO_SL);
+TRANS(LDX,  trans_lx, MO_UQ);
diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index b9b2d8bb7e1..d91d6efe02c 100644
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -13607,9 +13607,7 @@ static void decode_opc_special3_legacy(CPUMIPSState 
*env, DisasContext *ctx)
         }
         break;
     case OPC_LX_DSP:
-        if (!(ctx->insn_flags & INSN_OCTEON)) {
-            check_dsp(ctx);
-        }
+        check_dsp(ctx);
         op2 = MASK_LX(ctx->opcode);
         switch (op2) {
 #if defined(TARGET_MIPS64)
-- 
2.49.0