[Qemu-devel] [RFC 18/38] tcg: add fences

[Emilio G. Cota]

Signed-off-by: Emilio G. Cota <address@hidden>
---
 tcg/tcg-op.c  |  5 +++++
 tcg/tcg-op.h  | 18 ++++++++++++++++++
 tcg/tcg-opc.h |  5 +++++
 3 files changed, 28 insertions(+)

diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c
index 45098c3..6d5b1df 100644
--- a/tcg/tcg-op.c
+++ b/tcg/tcg-op.c
@@ -57,6 +57,11 @@ static void tcg_emit_op(TCGContext *ctx, TCGOpcode opc, int 
args)
     };
 }
 
+void tcg_gen_op0(TCGContext *ctx, TCGOpcode opc)
+{
+    tcg_emit_op(ctx, opc, -1);
+}
+
 void tcg_gen_op1(TCGContext *ctx, TCGOpcode opc, TCGArg a1)
 {
     int pi = ctx->gen_next_parm_idx;
diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h
index d1d763f..52482c0 100644
--- a/tcg/tcg-op.h
+++ b/tcg/tcg-op.h
@@ -28,6 +28,7 @@
 
 /* Basic output routines.  Not for general consumption.  */
 
+void tcg_gen_op0(TCGContext *, TCGOpcode);
 void tcg_gen_op1(TCGContext *, TCGOpcode, TCGArg);
 void tcg_gen_op2(TCGContext *, TCGOpcode, TCGArg, TCGArg);
 void tcg_gen_op3(TCGContext *, TCGOpcode, TCGArg, TCGArg, TCGArg);
@@ -698,6 +699,23 @@ static inline void tcg_gen_trunc_i64_i32(TCGv_i32 ret, 
TCGv_i64 arg)
     tcg_gen_trunc_shr_i64_i32(ret, arg, 0);
 }
 
+/* fences */
+
+static inline void tcg_gen_fence_load(void)
+{
+    tcg_gen_op0(&tcg_ctx, INDEX_op_fence_load);
+}
+
+static inline void tcg_gen_fence_store(void)
+{
+    tcg_gen_op0(&tcg_ctx, INDEX_op_fence_store);
+}
+
+static inline void tcg_gen_fence_full(void)
+{
+    tcg_gen_op0(&tcg_ctx, INDEX_op_fence_full);
+}
+
 /* QEMU specific operations.  */
 
 #ifndef TARGET_LONG_BITS
diff --git a/tcg/tcg-opc.h b/tcg/tcg-opc.h
index 13ccb60..85de953 100644
--- a/tcg/tcg-opc.h
+++ b/tcg/tcg-opc.h
@@ -167,6 +167,11 @@ DEF(muls2_i64, 2, 2, 0, IMPL64 | 
IMPL(TCG_TARGET_HAS_muls2_i64))
 DEF(muluh_i64, 1, 2, 0, IMPL(TCG_TARGET_HAS_muluh_i64))
 DEF(mulsh_i64, 1, 2, 0, IMPL(TCG_TARGET_HAS_mulsh_i64))
 
+/* fences */
+DEF(fence_load, 0, 0, 0, 0)
+DEF(fence_store, 0, 0, 0, 0)
+DEF(fence_full, 0, 0, 0, 0)
+
 /* QEMU specific */
 #if TARGET_LONG_BITS > TCG_TARGET_REG_BITS
 DEF(debug_insn_start, 0, 0, 2, TCG_OPF_NOT_PRESENT)
-- 
1.9.1