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[PATCH 08/13] target/mips: Convert Rel6 CACHE/PREF opcodes to decodetree
From: |
Philippe Mathieu-Daudé |
Subject: |
[PATCH 08/13] target/mips: Convert Rel6 CACHE/PREF opcodes to decodetree |
Date: |
Tue, 8 Dec 2020 21:36:59 +0100 |
CACHE/PREF 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>
---
target/mips/isa-mips32r6.decode | 3 +++
target/mips/translate.c | 2 --
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/target/mips/isa-mips32r6.decode b/target/mips/isa-mips32r6.decode
index 7b12a1bff25..e3b3934539a 100644
--- a/target/mips/isa-mips32r6.decode
+++ b/target/mips/isa-mips32r6.decode
@@ -19,3 +19,6 @@ LSA 000000 ..... ..... ..... 000 .. 000101
@lsa
REMOVED 010011 ----- ----- ----- ----- ------ # COP1X (COP3)
REMOVED 011100 ----- ----- ----- ----- ------ # SPECIAL2
+
+REMOVED 101111 ----- ----- ---------------- # CACHE
+REMOVED 110011 ----- ----- ---------------- # PREF
diff --git a/target/mips/translate.c b/target/mips/translate.c
index 81ca1d45063..ba1b2360c50 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -28667,7 +28667,6 @@ static void decode_opc(CPUMIPSState *env, DisasContext
*ctx)
gen_st_cond(ctx, rt, rs, imm, MO_TESL, false);
break;
case OPC_CACHE:
- check_insn_opc_removed(ctx, ISA_MIPS32R6);
check_cp0_enabled(ctx);
check_insn(ctx, ISA_MIPS3 | ISA_MIPS32);
if (ctx->hflags & MIPS_HFLAG_ITC_CACHE) {
@@ -28676,7 +28675,6 @@ static void decode_opc(CPUMIPSState *env, DisasContext
*ctx)
/* Treat as NOP. */
break;
case OPC_PREF:
- check_insn_opc_removed(ctx, ISA_MIPS32R6);
if (ctx->insn_flags & INSN_R5900) {
/* Treat as NOP. */
} else {
--
2.26.2
- Re: [PATCH 03/13] target/mips: Introduce decodetree helpers for MSA LSA/DLSA opcodes, (continued)
- [PATCH 04/13] target/mips: Introduce decodetree helpers for Release6 LSA/DLSA opcodes, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 05/13] target/mips: Remove now unreachable LSA/DLSA opcodes code, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 06/13] target/mips: Convert Rel6 Special2 opcode to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 07/13] target/mips: Convert Rel6 COP1X opcode to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 08/13] target/mips: Convert Rel6 CACHE/PREF opcodes to decodetree,
Philippe Mathieu-Daudé <=
- [PATCH 09/13] target/mips: Convert Rel6 LWL/LWR/SWL/SWR opcodes to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 10/13] target/mips: Convert Rel6 LWLE/LWRE/SWLE/SWRE opcodes to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 11/13] target/mips: Convert Rel6 LDL/LDR/SDL/SDR opcodes to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 12/13] target/mips: Convert Rel6 LLD/SCD opcodes to decodetree, Philippe Mathieu-Daudé, 2020/12/08
- [PATCH 13/13] target/mips: Convert Rel6 LL/SC opcodes to decodetree, Philippe Mathieu-Daudé, 2020/12/08