diff options
| author | Pranith Kumar <bobby.prani@gmail.com> | 2016-07-14 16:20:18 -0400 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-09-16 08:12:11 -0700 |
| commit | 6f0b99104a396905870edc3049310ece29b6b8d6 (patch) | |
| tree | c3a7f3a1333883781b597832e828d3fb5a758c1e /tcg | |
| parent | 5bbadbdfd6d9fb8729901124233dfca9f1f9554d (diff) | |
tcg/mips: Add support for fence
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20160714202026.9727-7-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/mips/tcg-target.inc.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tcg/mips/tcg-target.inc.c b/tcg/mips/tcg-target.inc.c index acb6ff06c6..abce6026f8 100644 --- a/tcg/mips/tcg-target.inc.c +++ b/tcg/mips/tcg-target.inc.c @@ -292,6 +292,7 @@ typedef enum { OPC_JALR = OPC_SPECIAL | 0x09, OPC_MOVZ = OPC_SPECIAL | 0x0A, OPC_MOVN = OPC_SPECIAL | 0x0B, + OPC_SYNC = OPC_SPECIAL | 0x0F, OPC_MFHI = OPC_SPECIAL | 0x10, OPC_MFLO = OPC_SPECIAL | 0x12, OPC_MULT = OPC_SPECIAL | 0x18, @@ -339,6 +340,14 @@ typedef enum { * backwards-compatible at the assembly level. */ OPC_MUL = use_mips32r6_instructions ? OPC_MUL_R6 : OPC_MUL_R5, + + /* MIPS r6 introduced names for weaker variants of SYNC. These are + backward compatible to previous architecture revisions. */ + OPC_SYNC_WMB = OPC_SYNC | 0x04 << 5, + OPC_SYNC_MB = OPC_SYNC | 0x10 << 5, + OPC_SYNC_ACQUIRE = OPC_SYNC | 0x11 << 5, + OPC_SYNC_RELEASE = OPC_SYNC | 0x12 << 5, + OPC_SYNC_RMB = OPC_SYNC | 0x13 << 5, } MIPSInsn; /* @@ -1384,6 +1393,22 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64) #endif } +static void tcg_out_mb(TCGContext *s, TCGArg a0) +{ + static const MIPSInsn sync[] = { + /* Note that SYNC_MB is a slightly weaker than SYNC 0, + as the former is an ordering barrier and the latter + is a completion barrier. */ + [0 ... TCG_MO_ALL] = OPC_SYNC_MB, + [TCG_MO_LD_LD] = OPC_SYNC_RMB, + [TCG_MO_ST_ST] = OPC_SYNC_WMB, + [TCG_MO_LD_ST] = OPC_SYNC_RELEASE, + [TCG_MO_LD_ST | TCG_MO_ST_ST] = OPC_SYNC_RELEASE, + [TCG_MO_LD_ST | TCG_MO_LD_LD] = OPC_SYNC_ACQUIRE, + }; + tcg_out32(s, sync[a0 & TCG_MO_ALL]); +} + static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args, const int *const_args) { @@ -1653,6 +1678,9 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const_args[4], const_args[5], true); break; + case INDEX_op_mb: + tcg_out_mb(s, a0); + break; case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ case INDEX_op_call: /* Always emitted via tcg_out_call. */ @@ -1733,6 +1761,8 @@ static const TCGTargetOpDef mips_op_defs[] = { { INDEX_op_qemu_ld_i64, { "L", "L", "lZ", "lZ" } }, { INDEX_op_qemu_st_i64, { "SZ", "SZ", "SZ", "SZ" } }, #endif + + { INDEX_op_mb, { } }, { -1 }, }; |