[Qemu-devel] [PATCH v5 5/8] target/mips: R5900 DMULT[U], DDIV[U], LL[D] and SC[D] are user only

[Fredrik Noring]

These MIPS III instructions are unavailable and therefore trapped and
emulated by the Linux kernel.

Signed-off-by: Fredrik Noring <nor...@nocrew.org>
Reviewed-by: Philippe Mathieu-Daudé <f4...@amsat.org>
---
 target/mips/translate.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/target/mips/translate.c b/target/mips/translate.c
index 2fe46f8775..67a6070e4f 100644
--- a/target/mips/translate.c
+++ b/target/mips/translate.c
@@ -22457,6 +22457,7 @@ static void decode_opc_special_legacy(CPUMIPSState 
*env, DisasContext *ctx)
     case OPC_DDIV:
     case OPC_DDIVU:
         check_insn(ctx, ISA_MIPS3);
+        check_insn_opc_user_only(ctx, INSN_R5900);
         check_mips_64(ctx);
         gen_muldiv(ctx, op1, 0, rs, rt);
         break;
@@ -24960,6 +24961,7 @@ static void decode_opc(CPUMIPSState *env, DisasContext 
*ctx)
          break;
     case OPC_LL: /* Load and stores */
         check_insn(ctx, ISA_MIPS2);
+        check_insn_opc_user_only(ctx, INSN_R5900);
         /* Fallthrough */
     case OPC_LWL:
     case OPC_LWR:
@@ -24985,6 +24987,7 @@ static void decode_opc(CPUMIPSState *env, DisasContext 
*ctx)
     case OPC_SC:
         check_insn(ctx, ISA_MIPS2);
          check_insn_opc_removed(ctx, ISA_MIPS32R6);
+        check_insn_opc_user_only(ctx, INSN_R5900);
          gen_st_cond(ctx, op, rt, rs, imm);
          break;
     case OPC_CACHE:
@@ -25251,9 +25254,11 @@ static void decode_opc(CPUMIPSState *env, DisasContext 
*ctx)
 
 #if defined(TARGET_MIPS64)
     /* MIPS64 opcodes */
+    case OPC_LLD:
+        check_insn_opc_user_only(ctx, INSN_R5900);
+        /* fall through */
     case OPC_LDL:
     case OPC_LDR:
-    case OPC_LLD:
         check_insn_opc_removed(ctx, ISA_MIPS32R6);
         /* fall through */
     case OPC_LWU:
@@ -25274,6 +25279,7 @@ static void decode_opc(CPUMIPSState *env, DisasContext 
*ctx)
     case OPC_SCD:
         check_insn_opc_removed(ctx, ISA_MIPS32R6);
         check_insn(ctx, ISA_MIPS3);
+        check_insn_opc_user_only(ctx, INSN_R5900);
         check_mips_64(ctx);
         gen_st_cond(ctx, op, rt, rs, imm);
         break;
-- 
2.16.4