diff options
| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-04-11 02:24:14 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-04-11 02:24:14 +0000 |
| commit | b48cfdffd9f15432355c8e4ed9d2781eab9e4358 (patch) | |
| tree | 1f2fd6d73b632641afb3bbeb344247aa0647ae9c | |
| parent | 2423f6601a19fa0ac4eac360de9d3fe80a18d715 (diff) | |
Throw RI for invalid MFMC0-class instructions. Introduce optional
MIPS_STRICT_STANDARD define to adhere more to the spec than it makes
sense in normal operation.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2650 c046a42c-6fe2-441c-8c8c-71466251a162
| -rw-r--r-- | target-mips/mips-defs.h | 5 | ||||
| -rw-r--r-- | target-mips/translate.c | 16 |
2 files changed, 18 insertions, 3 deletions
diff --git a/target-mips/mips-defs.h b/target-mips/mips-defs.h index 8b29e8b2d4..14043be272 100644 --- a/target-mips/mips-defs.h +++ b/target-mips/mips-defs.h @@ -19,4 +19,9 @@ #define TARGET_LONG_BITS 32 #endif +/* Strictly follow the architecture standard: Disallow "special" + instruction handling for PMON/SPIM, force cycle-dependent + Count/Compare maintenance. */ +//#define MIPS_STRICT_STANDARD 1 + #endif /* !defined (__QEMU_MIPS_DEFS_H__) */ diff --git a/target-mips/translate.c b/target-mips/translate.c index 1701607620..96ae2cd676 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -305,7 +305,7 @@ enum { }; /* MFMC0 opcodes */ -#define MASK_MFMC0(op) MASK_CP0(op) | (op & ((0x0C << 11) | (1 << 5))) +#define MASK_MFMC0(op) MASK_CP0(op) | (op & 0xFFFF) enum { OPC_DI = (0 << 5) | (0x0C << 11) | OPC_MFMC0, @@ -4715,8 +4715,13 @@ static void decode_opc (CPUState *env, DisasContext *ctx) case OPC_MTLO: /* Move to HI/LO */ gen_HILO(ctx, op1, rs); break; - case OPC_PMON: /* Pmon entry point */ + case OPC_PMON: /* Pmon entry point, also R4010 selsl */ +#ifdef MIPS_STRICT_STANDARD + MIPS_INVAL("PMON / selsl"); + generate_exception(ctx, EXCP_RI); +#else gen_op_pmon(sa); +#endif break; case OPC_SYSCALL: generate_exception(ctx, EXCP_SYSCALL); @@ -4724,10 +4729,15 @@ static void decode_opc (CPUState *env, DisasContext *ctx) case OPC_BREAK: generate_exception(ctx, EXCP_BREAK); break; - case OPC_SPIM: /* SPIM ? */ + case OPC_SPIM: +#ifdef MIPS_STRICT_STANDARD + MIPS_INVAL("SPIM"); + generate_exception(ctx, EXCP_RI); +#else /* Implemented as RI exception for now. */ MIPS_INVAL("spim (unofficial)"); generate_exception(ctx, EXCP_RI); +#endif break; case OPC_SYNC: /* Treat as a noop. */ |