[Qemu-devel] [PATCH v2 01/12] Introduce TCGOpcode for fence instruction

[Richard Henderson <rth@twiddle.net>]

This commit introduces the TCGOpcode for fence instruction.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Message-Id: <20160524171856.1000-2-bobby.prani@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
---
 tcg/tcg-op.c  | 6 ++++++
 tcg/tcg-op.h  | 2 ++
 tcg/tcg-opc.h | 2 ++
 3 files changed, 10 insertions(+)

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 54c0277..2a7af95 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -146,6 +146,12 @@ void tcg_gen_op6(TCGContext *ctx, TCGOpcode opc, TCGArg a1, TCGArg a2,
     tcg_emit_op(ctx, opc, pi);
 }
 
+void tcg_gen_fence(void)
+{
+    /* ??? Enable only when MTTCG is enabled.  */
+    tcg_gen_op1(&tcg_ctx, INDEX_op_fence, 0);
+}
+
 /* 32 bit ops */
 
 void tcg_gen_addi_i32(TCGv_i32 ret, TCGv_i32 arg1, int32_t arg2)
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index f217e80..2293720 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -261,6 +261,8 @@ static inline void tcg_gen_br(TCGLabel *l)
     tcg_gen_op1(&tcg_ctx, INDEX_op_br, label_arg(l));
 }
 
+void tcg_gen_fence(void);
+
 /* Helper calls. */
 
 /* 32 bit ops */
diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h
index 6d0410c..b772d90 100644
--- a/tcg/tcg-opc.h
+++ b/tcg/tcg-opc.h
@@ -42,6 +42,8 @@ DEF(br, 0, 0, 1, TCG_OPF_BB_END)
 # define IMPL64  TCG_OPF_64BIT
 #endif
 
+DEF(fence, 0, 0, 0, TCG_OPF_SIDE_EFFECTS)
+
 DEF(mov_i32, 1, 1, 0, TCG_OPF_NOT_PRESENT)
 DEF(movi_i32, 1, 0, 1, TCG_OPF_NOT_PRESENT)
 DEF(setcond_i32, 1, 2, 1, 0)
-- 
2.5.5