[Qemu-devel] [RFC v7 03/16] softmmu: Simplify helper_*_st_name, wrap MMIO code

[Alvise Rigo <a.rigo@virtualopensystems.com>]

Attempting to simplify the helper_*_st_name, wrap the MMIO code into an
inline function.

Based on this work, Alex proposed the following patch series
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg01136.html
that reduces code duplication of the softmmu_helpers.

Suggested-by: Jani Kokkonen <jani.kokkonen@huawei.com>
Suggested-by: Claudio Fontana <claudio.fontana@huawei.com>
Signed-off-by: Alvise Rigo <a.rigo@virtualopensystems.com>
---
 softmmu_template.h | 66 ++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 44 insertions(+), 22 deletions(-)

diff --git a/softmmu_template.h b/softmmu_template.h
index 7029a03..3d388ec 100644
--- a/softmmu_template.h
+++ b/softmmu_template.h
@@ -396,6 +396,26 @@ static inline void glue(helper_le_st_name, _do_unl_access)(CPUArchState *env,
     }
 }
 
+static inline void glue(helper_le_st_name, _do_mmio_access)(CPUArchState *env,
+                                                            DATA_TYPE val,
+                                                            target_ulong addr,
+                                                            TCGMemOpIdx oi,
+                                                            unsigned mmu_idx,
+                                                            int index,
+                                                            uintptr_t retaddr)
+{
+    CPUIOTLBEntry *iotlbentry = &env->iotlb[mmu_idx][index];
+
+    if ((addr & (DATA_SIZE - 1)) != 0) {
+        glue(helper_le_st_name, _do_unl_access)(env, val, addr, mmu_idx,
+                                                oi, retaddr);
+    }
+    /* ??? Note that the io helpers always read data in the target
+       byte ordering.  We should push the LE/BE request down into io.  */
+    val = TGT_LE(val);
+    glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
+}
+
 void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
                        TCGMemOpIdx oi, uintptr_t retaddr)
 {
@@ -423,17 +443,8 @@ void helper_le_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
 
     /* Handle an IO access.  */
     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
-        CPUIOTLBEntry *iotlbentry;
-        if ((addr & (DATA_SIZE - 1)) != 0) {
-            glue(helper_le_st_name, _do_unl_access)(env, val, addr, mmu_idx,
-                                                    oi, retaddr);
-        }
-        iotlbentry = &env->iotlb[mmu_idx][index];
-
-        /* ??? Note that the io helpers always read data in the target
-           byte ordering.  We should push the LE/BE request down into io.  */
-        val = TGT_LE(val);
-        glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
+        glue(helper_le_st_name, _do_mmio_access)(env, val, addr, oi,
+                                                 mmu_idx, index, retaddr);
         return;
     }
 
@@ -488,6 +499,26 @@ static inline void glue(helper_be_st_name, _do_unl_access)(CPUArchState *env,
     }
 }
 
+static inline void glue(helper_be_st_name, _do_mmio_access)(CPUArchState *env,
+                                                            DATA_TYPE val,
+                                                            target_ulong addr,
+                                                            TCGMemOpIdx oi,
+                                                            unsigned mmu_idx,
+                                                            int index,
+                                                            uintptr_t retaddr)
+{
+    CPUIOTLBEntry *iotlbentry = &env->iotlb[mmu_idx][index];
+
+    if ((addr & (DATA_SIZE - 1)) != 0) {
+        glue(helper_be_st_name, _do_unl_access)(env, val, addr, mmu_idx,
+                                                oi, retaddr);
+    }
+    /* ??? Note that the io helpers always read data in the target
+       byte ordering.  We should push the LE/BE request down into io.  */
+    val = TGT_BE(val);
+    glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
+}
+
 void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
                        TCGMemOpIdx oi, uintptr_t retaddr)
 {
@@ -515,17 +546,8 @@ void helper_be_st_name(CPUArchState *env, target_ulong addr, DATA_TYPE val,
 
     /* Handle an IO access.  */
     if (unlikely(tlb_addr & ~TARGET_PAGE_MASK)) {
-        CPUIOTLBEntry *iotlbentry;
-        if ((addr & (DATA_SIZE - 1)) != 0) {
-            glue(helper_be_st_name, _do_unl_access)(env, val, addr, mmu_idx,
-                                                    oi, retaddr);
-        }
-        iotlbentry = &env->iotlb[mmu_idx][index];
-
-        /* ??? Note that the io helpers always read data in the target
-           byte ordering.  We should push the LE/BE request down into io.  */
-        val = TGT_BE(val);
-        glue(io_write, SUFFIX)(env, iotlbentry, val, addr, retaddr);
+        glue(helper_be_st_name, _do_mmio_access)(env, val, addr, oi,
+                                                 mmu_idx, index, retaddr);
         return;
     }
 
-- 
2.7.0