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tcg/s390: Add support for fence

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Backports commit c9314d610e0e5da4d2cd5a36f3563d102b3294e0 from qemu
This commit is contained in:
Pranith Kumar 2018-02-26 03:19:38 -05:00 committed by Lioncash
parent bdd9cad15c
commit a6fdc24e28
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1 changed files with 11 additions and 0 deletions
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11
qemu/tcg/s390/tcg-target.inc.c
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@ -348,6 +348,7 @@ static tcg_insn_unit *tb_ret_addr;
#define FACILITY_EXT_IMM (1ULL << (63 - 21))
#define FACILITY_GEN_INST_EXT (1ULL << (63 - 34))
#define FACILITY_LOAD_ON_COND (1ULL << (63 - 45))
#define FACILITY_FAST_BCR_SER FACILITY_LOAD_ON_COND
static uint64_t facilities;
@ -2175,6 +2176,15 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tgen_deposit(s, args[0], args[2], args[3], args[4]);
break;
case INDEX_op_mb:
/* The host memory model is quite strong, we simply need to
serialize the instruction stream. */
if (args[0] & TCG_MO_ST_LD) {
tcg_out_insn(s, RR, BCR,
facilities & FACILITY_FAST_BCR_SER ? 14 : 15, 0);
}
break;
case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */
case INDEX_op_mov_i64:
case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */
@ -2296,6 +2306,7 @@ static const TCGTargetOpDef s390_op_defs[] = {
{ INDEX_op_movcond_i64, { "r", "r", "rC", "r", "0" } },
{ INDEX_op_deposit_i64, { "r", "0", "r" } },
{ INDEX_op_mb, { } },
{ -1 },
};