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target/mips: Convert Rel6 COP1X opcode to decodetree 

COP1x opcode has been removed from the Release 6.

Add a single decodetree entry for it, triggering
Reserved Instruction if ever used.

Remove unreachable check_insn_opc_removed() call.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20201208203704.243704-8-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-11-24 11:53:46 +01:00
parent aac357ec89
commit ddc7ef8dfe
2 changed files with 2 additions and 1 deletions
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2
target/mips/mips32r6.decode
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@ -16,4 +16,6 @@
LSA 000000 ..... ..... ..... 000 .. 000101 @lsa
REMOVED 010011 ----- ----- ----- ----- ------ # COP1X (COP3)
REMOVED 011100 ----- ----- ----- ----- ------ # SPECIAL2

1
target/mips/translate.c
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@ -28826,7 +28826,6 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
break;
case OPC_CP3:
check_insn_opc_removed(ctx, ISA_MIPS_R6);
if (ctx->CP0_Config1 & (1 << CP0C1_FP)) {
check_cp1_enabled(ctx);
op1 = MASK_CP3(ctx->opcode);