1 files changed, 88 insertions, 0 deletions
diff --git a/tcg/tcg-be-ldst.h b/tcg/tcg-be-ldst.h
new file mode 100644
index 00000000..40a2369b
--- /dev/null
+++ b/tcg/tcg-be-ldst.h
@@ -0,0 +1,88 @@
+/*
+ * TCG Backend Data: load-store optimization only.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#ifdef CONFIG_SOFTMMU
+
+typedef struct TCGLabelQemuLdst {
+    bool is_ld;             /* qemu_ld: true, qemu_st: false */
+    TCGMemOpIdx oi;
+    TCGType type;           /* result type of a load */
+    TCGReg addrlo_reg;      /* reg index for low word of guest virtual addr */
+    TCGReg addrhi_reg;      /* reg index for high word of guest virtual addr */
+    TCGReg datalo_reg;      /* reg index for low word to be loaded or stored */
+    TCGReg datahi_reg;      /* reg index for high word to be loaded or stored */
+    tcg_insn_unit *raddr;   /* gen code addr of the next IR of qemu_ld/st IR */
+    tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */
+    struct TCGLabelQemuLdst *next;
+} TCGLabelQemuLdst;
+
+typedef struct TCGBackendData {
+    TCGLabelQemuLdst *labels;
+} TCGBackendData;
+
+
+/*
+ * Initialize TB backend data at the beginning of the TB.
+ */
+
+static inline void tcg_out_tb_init(TCGContext *s)
+{
+    s->be->labels = NULL;
+}
+
+/*
+ * Generate TB finalization at the end of block
+ */
+
+static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
+static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l);
+
+static void tcg_out_tb_finalize(TCGContext *s)
+{
+    TCGLabelQemuLdst *lb;
+
+    /* qemu_ld/st slow paths */
+    for (lb = s->be->labels; lb != NULL; lb = lb->next) {
+        if (lb->is_ld) {
+            tcg_out_qemu_ld_slow_path(s, lb);
+        } else {
+            tcg_out_qemu_st_slow_path(s, lb);
+        }
+    }
+}
+
+/*
+ * Allocate a new TCGLabelQemuLdst entry.
+ */
+
+static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s)
+{
+    TCGBackendData *be = s->be;
+    TCGLabelQemuLdst *l = tcg_malloc(sizeof(*l));
+
+    l->next = be->labels;
+    be->labels = l;
+    return l;
+}
+#else
+#include "tcg-be-null.h"
+#endif /* CONFIG_SOFTMMU */