target/mips: Convert Rel6 LDL/LDR/SDL/SDR opcodes to decodetree
LDL/LDR/SDL/SDR opcodes have been removed from the Release 6. Add a single decodetree entry for the opcodes, triggering Reserved Instruction if ever used. Remove unreachable check_insn_opc_removed() calls. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20201208203704.243704-12-f4bug@amsat.org>
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@ -12,6 +12,13 @@
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&rtype rs rt rd sa !extern
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&REMOVED !extern
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@lsa ...... rs:5 rt:5 rd:5 ... sa:2 ...... &rtype
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DLSA 000000 ..... ..... ..... 000 .. 010101 @lsa
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REMOVED 011010 ----- ----- ---------------- # LDL
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REMOVED 011011 ----- ----- ---------------- # LDR
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REMOVED 101100 ----- ----- ---------------- # SDL
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REMOVED 101101 ----- ----- ---------------- # SDR
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@ -28870,11 +28870,10 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
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if (ctx->insn_flags & INSN_R5900) {
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check_insn_opc_user_only(ctx, INSN_R5900);
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}
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check_insn_opc_removed(ctx, ISA_MIPS_R6);
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/* fall through */
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case OPC_LDL:
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case OPC_LDR:
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check_insn_opc_removed(ctx, ISA_MIPS_R6);
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/* fall through */
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case OPC_LWU:
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case OPC_LD:
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check_insn(ctx, ISA_MIPS3);
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@ -28883,8 +28882,6 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
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break;
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case OPC_SDL:
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case OPC_SDR:
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check_insn_opc_removed(ctx, ISA_MIPS_R6);
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/* fall through */
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case OPC_SD:
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check_insn(ctx, ISA_MIPS3);
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check_mips_64(ctx);
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