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target/mips: Convert Octeon LX instructions to decodetree

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

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241111222936.59869-4-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé
2025-07-15 00:23:09 +02:00
parent f0be3f9769
commit 23ecff81ac
3 changed files with 21 additions and 3 deletions
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target/mips/tcg/octeon.decode
+8
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@@ -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
target/mips/tcg/octeon_translate.c
+12
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@@ -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);
target/mips/tcg/translate.c
+1 -3
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@@ -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)