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avoid generating useless exceptions (Jocelyn Mayer) 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1656 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-11-23 21:36:30 +00:00
parent 7668a27f1d
commit f24e5695e5
1 changed files with 26 additions and 11 deletions
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37
target-ppc/translate.c
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@ -177,17 +177,16 @@ RET_EXCP((ctx), EXCP_PROGRAM, EXCP_INVAL | EXCP_PRIV_OPC)
#define RET_PRIVREG(ctx) \
RET_EXCP((ctx), EXCP_PROGRAM, EXCP_INVAL | EXCP_PRIV_REG)
#define RET_MTMSR(ctx) \
RET_EXCP((ctx), EXCP_MTMSR, 0)
/* Stop translation */
static inline void RET_STOP (DisasContext *ctx)
{
RET_EXCP(ctx, EXCP_MTMSR, 0);
gen_op_update_nip((ctx)->nip);
ctx->exception = EXCP_MTMSR;
}
/* No need to update nip here, as execution flow will change */
static inline void RET_CHG_FLOW (DisasContext *ctx)
{
gen_op_raise_exception_err(EXCP_MTMSR, 0);
ctx->exception = EXCP_MTMSR;
}
@ -2051,11 +2050,19 @@ static inline void gen_op_mfspr (DisasContext *ctx)
gen_op_store_T0_gpr(rD(ctx->opcode));
} else {
/* Privilege exception */
if (loglevel) {
fprintf(logfile, "Trying to read priviledged spr %d %03x\n",
sprn, sprn);
}
printf("Trying to read priviledged spr %d %03x\n", sprn, sprn);
RET_PRIVREG(ctx);
}
} else {
/* Not defined */
if (loglevel) {
fprintf(logfile, "Trying to read invalid spr %d %03x\n",
sprn, sprn);
}
printf("Trying to read invalid spr %d %03x\n", sprn, sprn);
RET_EXCP(ctx, EXCP_PROGRAM, EXCP_INVAL | EXCP_INVAL_SPR);
}
@ -2093,7 +2100,7 @@ GEN_HANDLER(mtmsr, 0x1F, 0x12, 0x04, 0x001FF801, PPC_MISC)
gen_op_load_gpr_T0(rS(ctx->opcode));
gen_op_store_msr();
/* Must stop the translation as machine state (may have) changed */
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}
@ -2115,11 +2122,19 @@ GEN_HANDLER(mtspr, 0x1F, 0x13, 0x0E, 0x00000001, PPC_MISC)
(*write_cb)(ctx, sprn);
} else {
/* Privilege exception */
if (loglevel) {
fprintf(logfile, "Trying to write priviledged spr %d %03x\n",
sprn, sprn);
}
printf("Trying to write priviledged spr %d %03x\n", sprn, sprn);
RET_PRIVREG(ctx);
}
} else {
/* Not defined */
if (loglevel) {
fprintf(logfile, "Trying to write invalid spr %d %03x\n",
sprn, sprn);
}
printf("Trying to write invalid spr %d %03x\n", sprn, sprn);
RET_EXCP(ctx, EXCP_PROGRAM, EXCP_INVAL | EXCP_INVAL_SPR);
}
@ -2278,7 +2293,7 @@ GEN_HANDLER(mtsr, 0x1F, 0x12, 0x06, 0x0010F801, PPC_SEGMENT)
}
gen_op_load_gpr_T0(rS(ctx->opcode));
gen_op_store_sr(SR(ctx->opcode));
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}
@ -2295,7 +2310,7 @@ GEN_HANDLER(mtsrin, 0x1F, 0x12, 0x07, 0x001F0001, PPC_SEGMENT)
gen_op_load_gpr_T0(rS(ctx->opcode));
gen_op_load_gpr_T1(rB(ctx->opcode));
gen_op_store_srin();
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}
@ -2314,7 +2329,7 @@ GEN_HANDLER(tlbia, 0x1F, 0x12, 0x0B, 0x03FFFC01, PPC_MEM_TLBIA)
return;
}
gen_op_tlbia();
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}
@ -2330,7 +2345,7 @@ GEN_HANDLER(tlbie, 0x1F, 0x12, 0x09, 0x03FF0001, PPC_MEM)
}
gen_op_load_gpr_T0(rB(ctx->opcode));
gen_op_tlbie();
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}
@ -2347,7 +2362,7 @@ GEN_HANDLER(tlbsync, 0x1F, 0x16, 0x11, 0x03FFF801, PPC_MEM)
/* This has no effect: it should ensure that all previous
* tlbie have completed
*/
RET_MTMSR(ctx);
RET_STOP(ctx);
#endif
}