[RFC PATCH 09/25] qemu/bswap: Introduce LD_CONVERT() macro

[Philippe Mathieu-Daudé]

To be able to add more load/store operations,
introduce the LD_CONVERT() macro.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 include/qemu/bswap.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/qemu/bswap.h b/include/qemu/bswap.h
index 4e2bd2e97ee..c2fd4f31d20 100644
--- a/include/qemu/bswap.h
+++ b/include/qemu/bswap.h
@@ -434,18 +434,37 @@ static inline void stq_be_p(void *ptr, uint64_t v)
     stq_he_p(ptr, be_bswap(v, 64));
 }
 
+#define LD_CONVERT_UNALIGNED(bits, rtype, vtype, size)\
+static inline rtype ld ## size ## _he_p(const void *ptr)\
+{\
+    vtype r;\
+    __builtin_memcpy(&r, ptr, sizeof(r));\
+    return r;\
+}
+
 #define ST_CONVERT_UNALIGNED(bits, vtype, size)\
 static inline void st ## size ## _he_p(void *ptr, vtype v)\
 {\
     __builtin_memcpy(ptr, &v, sizeof(v));\
 }
 
+#define LD_CONVERT_END(endian, bits, rtype, vtype, size)\
+static inline rtype ld ## size ## _ ## endian ## _p(const void *ptr)\
+{\
+    return (vtype)glue(endian, _bswap)(ld ## size ## _he_p(ptr), bits);\
+}
+
 #define ST_CONVERT_END(endian, bits, vtype, size)\
 static inline void st ## size ## _ ## endian ## _p(void *ptr, vtype v)\
 {\
     st ## size ## _he_p(ptr, glue(endian, _bswap)(v, bits));\
 }
 
+#define LD_CONVERT(bits, rtype, vtype, size)\
+    LD_CONVERT_UNALIGNED(bits, rtype, vtype, size)\
+    LD_CONVERT_END(le, bits, rtype, vtype, size)\
+    LD_CONVERT_END(be, bits, rtype, vtype, size)
+
 #define ST_CONVERT(bits, vtype, size)\
     ST_CONVERT_UNALIGNED(bits, vtype, size)\
     ST_CONVERT_END(le, bits, vtype, size)\
-- 
2.26.3