accel/tcg: Implement translator_ld*_end

Add a new family of translator load functions which take
an absolute endianness value in the form of MO_BE/MO_LE.
Expand the other translator_ld* functions on top of this.
Remove exec/tswap.h from translator.c.

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

accel/tcg/translator.c

@@ -8,6 +8,7 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/bswap.h"
 #include "qemu/log.h"
 #include "qemu/error-report.h"
 #include "exec/exec-all.h"
@@ -15,7 +16,6 @@
 #include "accel/tcg/cpu-mmu-index.h"
 #include "exec/translator.h"
 #include "exec/plugin-gen.h"
-#include "exec/tswap.h"
 #include "tcg/tcg-op-common.h"
 #include "internal-target.h"
 #include "disas/disas.h"
@@ -468,7 +468,8 @@ uint8_t translator_ldub(CPUArchState *env, DisasContextBase *db, vaddr pc)
     return val;
 }
 
-uint16_t translator_lduw(CPUArchState *env, DisasContextBase *db, vaddr pc)
+uint16_t translator_lduw_end(CPUArchState *env, DisasContextBase *db,
+                             vaddr pc, MemOp endian)
 {
     uint16_t val;
 
@@ -477,10 +478,14 @@ uint16_t translator_lduw(CPUArchState *env, DisasContextBase *db, vaddr pc)
         val = cpu_ldw_code_mmu(env, pc, oi, 0);
         record_save(db, pc, &val, sizeof(val));
     }
-    return tswap16(val);
+    if (endian & MO_BSWAP) {
+        val = bswap16(val);
+    }
+    return val;
 }
 
-uint32_t translator_ldl(CPUArchState *env, DisasContextBase *db, vaddr pc)
+uint32_t translator_ldl_end(CPUArchState *env, DisasContextBase *db,
+                            vaddr pc, MemOp endian)
 {
     uint32_t val;
 
@@ -489,10 +494,14 @@ uint32_t translator_ldl(CPUArchState *env, DisasContextBase *db, vaddr pc)
         val = cpu_ldl_code_mmu(env, pc, oi, 0);
         record_save(db, pc, &val, sizeof(val));
     }
-    return tswap32(val);
+    if (endian & MO_BSWAP) {
+        val = bswap32(val);
+    }
+    return val;
 }
 
-uint64_t translator_ldq(CPUArchState *env, DisasContextBase *db, vaddr pc)
+uint64_t translator_ldq_end(CPUArchState *env, DisasContextBase *db,
+                            vaddr pc, MemOp endian)
 {
     uint64_t val;
 
@@ -501,7 +510,10 @@ uint64_t translator_ldq(CPUArchState *env, DisasContextBase *db, vaddr pc)
         val = cpu_ldq_code_mmu(env, pc, oi, 0);
         record_save(db, pc, &val, sizeof(val));
     }
-    return tswap64(val);
+    if (endian & MO_BSWAP) {
+        val = bswap64(val);
+    }
+    return val;
 }
 
 void translator_fake_ld(DisasContextBase *db, const void *data, size_t len)

include/exec/translator.h

@@ -18,7 +18,7 @@
  * member in your target-specific DisasContext.
  */
 
-#include "qemu/bswap.h"
+#include "exec/memop.h"
 #include "exec/vaddr.h"
 
 /**
@@ -181,42 +181,53 @@ bool translator_io_start(DisasContextBase *db);
  */
 
 uint8_t translator_ldub(CPUArchState *env, DisasContextBase *db, vaddr pc);
-uint16_t translator_lduw(CPUArchState *env, DisasContextBase *db, vaddr pc);
+uint16_t translator_lduw_end(CPUArchState *env, DisasContextBase *db,
-uint32_t translator_ldl(CPUArchState *env, DisasContextBase *db, vaddr pc);
+                             vaddr pc, MemOp endian);
-uint64_t translator_ldq(CPUArchState *env, DisasContextBase *db, vaddr pc);
+uint32_t translator_ldl_end(CPUArchState *env, DisasContextBase *db,
+                            vaddr pc, MemOp endian);
+uint64_t translator_ldq_end(CPUArchState *env, DisasContextBase *db,
+                            vaddr pc, MemOp endian);
+
+#ifdef COMPILING_PER_TARGET
+static inline uint16_t
+translator_lduw(CPUArchState *env, DisasContextBase *db, vaddr pc)
+{
+    return translator_lduw_end(env, db, pc, MO_TE);
+}
+
+static inline uint32_t
+translator_ldl(CPUArchState *env, DisasContextBase *db, vaddr pc)
+{
+    return translator_ldl_end(env, db, pc, MO_TE);
+}
+
+static inline uint64_t
+translator_ldq(CPUArchState *env, DisasContextBase *db, vaddr pc)
+{
+    return translator_ldq_end(env, db, pc, MO_TE);
+}
 
 static inline uint16_t
 translator_lduw_swap(CPUArchState *env, DisasContextBase *db,
                      vaddr pc, bool do_swap)
 {
-    uint16_t ret = translator_lduw(env, db, pc);
+    return translator_lduw_end(env, db, pc, MO_TE ^ (do_swap * MO_BSWAP));
-    if (do_swap) {
-        ret = bswap16(ret);
-    }
-    return ret;
 }
 
 static inline uint32_t
 translator_ldl_swap(CPUArchState *env, DisasContextBase *db,
                     vaddr pc, bool do_swap)
 {
-    uint32_t ret = translator_ldl(env, db, pc);
+    return translator_ldl_end(env, db, pc, MO_TE ^ (do_swap * MO_BSWAP));
-    if (do_swap) {
-        ret = bswap32(ret);
-    }
-    return ret;
 }
 
 static inline uint64_t
 translator_ldq_swap(CPUArchState *env, DisasContextBase *db,
                     vaddr pc, bool do_swap)
 {
-    uint64_t ret = translator_ldq(env, db, pc);
+    return translator_ldq_end(env, db, pc, MO_TE ^ (do_swap * MO_BSWAP));
-    if (do_swap) {
-        ret = bswap64(ret);
-    }
-    return ret;
 }
+#endif /* COMPILING_PER_TARGET */
 
 /**
  * translator_fake_ld - fake instruction load