diff options
| author | Richard Henderson <rth@twiddle.net> | 2013-09-06 09:31:37 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-02-03 12:06:37 -0800 |
| commit | 8612c935831647c193281992738f96292428b9e6 (patch) | |
| tree | c57edee8caed0955bb55fd049954a87c783bf9b4 /target-s390x | |
| parent | 16017c48547960539fcadb1f91d252124f442482 (diff) | |
target-s390: Implement SAM specification exception
Also, these are user-mode instructions; allow their use
in CONFIG_USER_ONLY.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-s390x')
| -rw-r--r-- | target-s390x/insn-data.def | 8 | ||||
| -rw-r--r-- | target-s390x/translate.c | 31 |
2 files changed, 31 insertions, 8 deletions
diff --git a/target-s390x/insn-data.def b/target-s390x/insn-data.def index 4d2feb6977..42b99b2746 100644 --- a/target-s390x/insn-data.def +++ b/target-s390x/insn-data.def @@ -566,6 +566,10 @@ /* SET ACCESS */ C(0xb24e, SAR, RRE, Z, 0, r2_o, 0, 0, sar, 0) +/* SET ADDRESSING MODE */ + D(0x010c, SAM24, E, Z, 0, 0, 0, 0, sam, 0, 0) + D(0x010d, SAM31, E, Z, 0, 0, 0, 0, sam, 0, 1) + D(0x010e, SAM64, E, Z, 0, 0, 0, 0, sam, 0, 3) /* SET FPC */ C(0xb384, SFPC, RRE, Z, 0, r1_o, 0, 0, sfpc, 0) /* SET FPC AND SIGNAL */ @@ -743,10 +747,6 @@ C(0xb22a, RRBE, RRE, Z, 0, r2_o, 0, 0, rrbe, 0) /* SERVICE CALL LOGICAL PROCESSOR (PV hypercall) */ C(0xb220, SERVC, RRE, Z, r1_o, r2_o, 0, 0, servc, 0) -/* SET ADDRESSING MODE */ - D(0x010c, SAM24, E, Z, 0, 0, 0, 0, sam, 0, 0) - D(0x010d, SAM31, E, Z, 0, 0, 0, 0, sam, 0, 1) - D(0x010e, SAM64, E, Z, 0, 0, 0, 0, sam, 0, 3) /* SET ADDRESS SPACE CONTROL FAST */ C(0xb279, SACF, S, Z, 0, a2, 0, 0, sacf, 0) /* SET CLOCK */ diff --git a/target-s390x/translate.c b/target-s390x/translate.c index ab01bc004e..1338bb5a34 100644 --- a/target-s390x/translate.c +++ b/target-s390x/translate.c @@ -2925,19 +2925,42 @@ static ExitStatus op_sacf(DisasContext *s, DisasOps *o) /* Addressing mode has changed, so end the block. */ return EXIT_PC_STALE; } +#endif static ExitStatus op_sam(DisasContext *s, DisasOps *o) { int sam = s->insn->data; - TCGv_i64 tsam = tcg_const_i64(sam); + TCGv_i64 tsam; + uint64_t mask; - /* Overwrite PSW_MASK_64 and PSW_MASK_32 */ - tcg_gen_deposit_i64(psw_mask, psw_mask, tsam, 31, 2); + switch (sam) { + case 0: + mask = 0xffffff; + break; + case 1: + mask = 0x7fffffff; + break; + default: + mask = -1; + break; + } + + /* Bizzare but true, we check the address of the current insn for the + specification exception, not the next to be executed. Thus the PoO + documents that Bad Things Happen two bytes before the end. */ + if (s->pc & ~mask) { + gen_program_exception(s, PGM_SPECIFICATION); + return EXIT_NORETURN; + } + s->next_pc &= mask; + tsam = tcg_const_i64(sam); + tcg_gen_deposit_i64(psw_mask, psw_mask, tsam, 31, 2); tcg_temp_free_i64(tsam); + + /* Always exit the TB, since we (may have) changed execution mode. */ return EXIT_PC_STALE; } -#endif static ExitStatus op_sar(DisasContext *s, DisasOps *o) { |