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target/mips: Convert Rel6 LL/SC opcodes to decodetree

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LL/SC 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: <20201208203704.243704-14-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2020-11-26 11:59:21 +01:00
parent 1ff668dde2
commit 27ea1bc077
2 changed files with 2 additions and 2 deletions
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2
target/mips/mips32r6.decode
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@ -31,4 +31,6 @@ REMOVED 101010 ----- ----- ---------------- # SWL
REMOVED 101110 ----- ----- ---------------- # SWR
REMOVED 101111 ----- ----- ---------------- # CACHE
REMOVED 110000 ----- ----- ---------------- # LL
REMOVED 110011 ----- ----- ---------------- # PREF
REMOVED 111000 ----- ----- ---------------- # SC

2
target/mips/translate.c
View file

@ -28584,7 +28584,6 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
if (ctx->insn_flags & INSN_R5900) {
check_insn_opc_user_only(ctx, INSN_R5900);
}
check_insn_opc_removed(ctx, ISA_MIPS_R6);
/* Fallthrough */
case OPC_LWL:
case OPC_LWR:
@ -28605,7 +28604,6 @@ static bool decode_opc_legacy(CPUMIPSState *env, DisasContext *ctx)
break;
case OPC_SC:
check_insn(ctx, ISA_MIPS2);
check_insn_opc_removed(ctx, ISA_MIPS_R6);
if (ctx->insn_flags & INSN_R5900) {
check_insn_opc_user_only(ctx, INSN_R5900);
}