[RFC,15/25] exec/memory: Add methods for aligned pointer access (address space)

Commit Message

Philippe Mathieu-Daudé May 18, 2021, 6:36 p.m. UTC

Signed-off-by: Philippe Mathieu-Daudé <[e-mail]>
---
 include/exec/memory.h                 | 11 +++++++++++
 include/exec/memory_ldst_cached.h.inc | 20 ++++++++++++++++----
 2 files changed, 27 insertions(+), 4 deletions(-)

Patch

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 175d7151a5d..7eeabbceef3 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -2315,12 +2315,23 @@  static inline void address_space_stb_cached(MemoryRegionCache *cache,
     }
 }
 
+#define address_space_ldub_cached_aligned   address_space_ldub_cached
+#define address_space_stb_cached_aligned    address_space_stb_cached
+
 #define ENDIANNESS   _le
 #include "exec/memory_ldst_cached.h.inc"
 
 #define ENDIANNESS   _be
 #include "exec/memory_ldst_cached.h.inc"
 
+#define LDST_ALIGNED
+#define ENDIANNESS   _le
+#include "exec/memory_ldst_cached.h.inc"
+
+#define LDST_ALIGNED
+#define ENDIANNESS   _be
+#include "exec/memory_ldst_cached.h.inc"
+
 #define SUFFIX       _cached
 #define ARG1         cache
 #define ARG1_DECL    MemoryRegionCache *cache
diff --git a/include/exec/memory_ldst_cached.h.inc b/include/exec/memory_ldst_cached.h.inc
index d7834f852c4..db45e688c03 100644
--- a/include/exec/memory_ldst_cached.h.inc
+++ b/include/exec/memory_ldst_cached.h.inc
@@ -17,12 +17,21 @@ 
  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef LDST_ALIGNED
+#define FUNC_SUFFIX _cached_aligned
+#define LDST_SUFFIX _ap
+#undef LDST_ALIGNED
+#else
+#define FUNC_SUFFIX _cached
+#define LDST_SUFFIX _p
+#endif
+
 #define ADDRESS_SPACE_LD_CACHED(size) \
-    glue(glue(address_space_ld, size), glue(ENDIANNESS, _cached))
+    glue(glue(address_space_ld, size), glue(ENDIANNESS, FUNC_SUFFIX))
 #define ADDRESS_SPACE_LD_CACHED_SLOW(size) \
     glue(glue(address_space_ld, size), glue(ENDIANNESS, _cached_slow))
 #define LD_P(size) \
-    glue(glue(ld, size), glue(ENDIANNESS, _p))
+    glue(glue(ld, size), glue(ENDIANNESS, LDST_SUFFIX))
 
 static inline uint16_t ADDRESS_SPACE_LD_CACHED(uw)(MemoryRegionCache *cache,
     hwaddr addr, MemTxAttrs attrs, MemTxResult *result)
@@ -65,11 +74,11 @@  static inline uint64_t ADDRESS_SPACE_LD_CACHED(q)(MemoryRegionCache *cache,
 #undef LD_P
 
 #define ADDRESS_SPACE_ST_CACHED(size) \
-    glue(glue(address_space_st, size), glue(ENDIANNESS, _cached))
+    glue(glue(address_space_st, size), glue(ENDIANNESS, FUNC_SUFFIX))
 #define ADDRESS_SPACE_ST_CACHED_SLOW(size) \
     glue(glue(address_space_st, size), glue(ENDIANNESS, _cached_slow))
 #define ST_P(size) \
-    glue(glue(st, size), glue(ENDIANNESS, _p))
+    glue(glue(st, size), glue(ENDIANNESS, LDST_SUFFIX))
 
 static inline void ADDRESS_SPACE_ST_CACHED(w)(MemoryRegionCache *cache,
     hwaddr addr, uint16_t val, MemTxAttrs attrs, MemTxResult *result)
@@ -108,4 +117,7 @@  static inline void ADDRESS_SPACE_ST_CACHED(q)(MemoryRegionCache *cache,
 #undef ADDRESS_SPACE_ST_CACHED_SLOW
 #undef ST_P
 
+#undef FUNC_SUFFIX
+#undef LDST_SUFFIX
+
 #undef ENDIANNESS