diff options
Diffstat (limited to 'target/s390x/tcg/translate.c')
| -rw-r--r-- | target/s390x/tcg/translate.c | 42 |
1 files changed, 17 insertions, 25 deletions
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index fd2433d625..e2ee005671 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -149,6 +149,7 @@ struct DisasContext { uint64_t pc_tmp; uint32_t ilen; enum cc_op cc_op; + bool exit_to_mainloop; }; /* Information carried about a condition to be evaluated. */ @@ -1123,19 +1124,9 @@ typedef struct { exiting the TB. */ #define DISAS_PC_UPDATED DISAS_TARGET_0 -/* We have emitted one or more goto_tb. No fixup required. */ -#define DISAS_GOTO_TB DISAS_TARGET_1 - /* We have updated the PC and CC values. */ #define DISAS_PC_CC_UPDATED DISAS_TARGET_2 -/* We are exiting the TB, but have neither emitted a goto_tb, nor - updated the PC for the next instruction to be executed. */ -#define DISAS_PC_STALE DISAS_TARGET_3 - -/* We are exiting the TB to the main loop. */ -#define DISAS_PC_STALE_NOCHAIN DISAS_TARGET_4 - /* Instruction flags */ #define IF_AFP1 0x0001 /* r1 is a fp reg for HFP/FPS instructions */ @@ -1189,7 +1180,7 @@ static DisasJumpType help_goto_direct(DisasContext *s, uint64_t dest) tcg_gen_goto_tb(0); tcg_gen_movi_i64(psw_addr, dest); tcg_gen_exit_tb(s->base.tb, 0); - return DISAS_GOTO_TB; + return DISAS_NORETURN; } else { tcg_gen_movi_i64(psw_addr, dest); per_branch(s, false); @@ -1258,7 +1249,7 @@ static DisasJumpType help_branch(DisasContext *s, DisasCompare *c, tcg_gen_movi_i64(psw_addr, dest); tcg_gen_exit_tb(s->base.tb, 1); - ret = DISAS_GOTO_TB; + ret = DISAS_NORETURN; } else { /* Fallthru can use goto_tb, but taken branch cannot. */ /* Store taken branch destination before the brcond. This @@ -3029,7 +3020,8 @@ static DisasJumpType op_lctl(DisasContext *s, DisasOps *o) tcg_temp_free_i32(r1); tcg_temp_free_i32(r3); /* Exit to main loop to reevaluate s390_cpu_exec_interrupt. */ - return DISAS_PC_STALE_NOCHAIN; + s->exit_to_mainloop = true; + return DISAS_TOO_MANY; } static DisasJumpType op_lctlg(DisasContext *s, DisasOps *o) @@ -3040,7 +3032,8 @@ static DisasJumpType op_lctlg(DisasContext *s, DisasOps *o) tcg_temp_free_i32(r1); tcg_temp_free_i32(r3); /* Exit to main loop to reevaluate s390_cpu_exec_interrupt. */ - return DISAS_PC_STALE_NOCHAIN; + s->exit_to_mainloop = true; + return DISAS_TOO_MANY; } static DisasJumpType op_lra(DisasContext *s, DisasOps *o) @@ -3996,7 +3989,7 @@ static DisasJumpType op_sacf(DisasContext *s, DisasOps *o) { gen_helper_sacf(cpu_env, o->in2); /* Addressing mode has changed, so end the block. */ - return DISAS_PC_STALE; + return DISAS_TOO_MANY; } #endif @@ -4032,7 +4025,7 @@ static DisasJumpType op_sam(DisasContext *s, DisasOps *o) tcg_temp_free_i64(tsam); /* Always exit the TB, since we (may have) changed execution mode. */ - return DISAS_PC_STALE; + return DISAS_TOO_MANY; } static DisasJumpType op_sar(DisasContext *s, DisasOps *o) @@ -4290,7 +4283,8 @@ static DisasJumpType op_ssm(DisasContext *s, DisasOps *o) { tcg_gen_deposit_i64(psw_mask, psw_mask, o->in2, 56, 8); /* Exit to main loop to reevaluate s390_cpu_exec_interrupt. */ - return DISAS_PC_STALE_NOCHAIN; + s->exit_to_mainloop = true; + return DISAS_TOO_MANY; } static DisasJumpType op_stap(DisasContext *s, DisasOps *o) @@ -4555,7 +4549,8 @@ static DisasJumpType op_stnosm(DisasContext *s, DisasOps *o) } /* Exit to main loop to reevaluate s390_cpu_exec_interrupt. */ - return DISAS_PC_STALE_NOCHAIN; + s->exit_to_mainloop = true; + return DISAS_TOO_MANY; } static DisasJumpType op_stura(DisasContext *s, DisasOps *o) @@ -6565,13 +6560,13 @@ static DisasJumpType translate_one(CPUS390XState *env, DisasContext *s) /* io should be the last instruction in tb when icount is enabled */ if (unlikely(icount && ret == DISAS_NEXT)) { - ret = DISAS_PC_STALE; + ret = DISAS_TOO_MANY; } #ifndef CONFIG_USER_ONLY if (s->base.tb->flags & FLAG_MASK_PER) { /* An exception might be triggered, save PSW if not already done. */ - if (ret == DISAS_NEXT || ret == DISAS_PC_STALE) { + if (ret == DISAS_NEXT || ret == DISAS_TOO_MANY) { tcg_gen_movi_i64(psw_addr, s->pc_tmp); } @@ -6598,6 +6593,7 @@ static void s390x_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs) dc->cc_op = CC_OP_DYNAMIC; dc->ex_value = dc->base.tb->cs_base; + dc->exit_to_mainloop = (dc->base.tb->flags & FLAG_MASK_PER) || dc->ex_value; } static void s390x_tr_tb_start(DisasContextBase *db, CPUState *cs) @@ -6634,12 +6630,9 @@ static void s390x_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs) DisasContext *dc = container_of(dcbase, DisasContext, base); switch (dc->base.is_jmp) { - case DISAS_GOTO_TB: case DISAS_NORETURN: break; case DISAS_TOO_MANY: - case DISAS_PC_STALE: - case DISAS_PC_STALE_NOCHAIN: update_psw_addr(dc); /* FALLTHRU */ case DISAS_PC_UPDATED: @@ -6649,8 +6642,7 @@ static void s390x_tr_tb_stop(DisasContextBase *dcbase, CPUState *cs) /* FALLTHRU */ case DISAS_PC_CC_UPDATED: /* Exit the TB, either by raising a debug exception or by return. */ - if ((dc->base.tb->flags & FLAG_MASK_PER) || - dc->base.is_jmp == DISAS_PC_STALE_NOCHAIN) { + if (dc->exit_to_mainloop) { tcg_gen_exit_tb(NULL, 0); } else { tcg_gen_lookup_and_goto_ptr(); |